Reaction Dynamics on the Liquid/Solid "Soft" Interface

• Project Area: Science on Function of Soft Molecular Systems by Cooperation of Theory and Experiment
• Project/Area Number: 16H00852
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Toyota Technological Institute
• Principal Investigator: 山方 啓 豊田工業大学, 工学(系)研究科(研究院), 准教授 (60321915)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000); Fiscal Year 2017: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000); Fiscal Year 2016: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
• Keywords: 時間分解赤外分光 / 光電極反応 / 電荷分離 / キャリアーダイナミクス / 酸化チタン電極 / 固液界面反応 / 水の酸化反応 / 反応中間体 / 時間分解赤外分光測定 / 固液界面 / 半導体光電極反応 / 時間分解分光測定 / 酸化チタン / 光触媒 / 光励起キャリアー / 再結合過程 / 光電極

Outline of Annual Research Achievements

酸化チタン電極に紫外光レーザーパルスを照射して可視から近赤外域の過渡吸収スペクトルを測定するとトラップ電子と正孔の減衰過程を調べることができる。そこで、本研究では、酸化チタン電極に電位を印加しながら光励起キャリアーの挙動を調べた。その結果、正電位を印加してレーザーパルスを照射すると、光励起されて生成したキャリアーの寿命が長くなる様子が観測された。この結果は正電位の印加によってn型半導体と水の界面に形成された上向きのバンドベンディングが大きくなり、電荷分離が促進されたためである。一方、中赤外域の時間分解スペクトルには、伝導帯に励起された自由電子による吸収の他に、水分子の構造変化による吸収変化が観察された。水の酸化反応が進行する電位で酸化チタンのバンドギャップを励起すると、水素結合した水に帰属される吸収（3350 cm-1と3120 cm-1）が減少した。この減少量は水の分解反応がより進行しやすい正電位にすればするほどが増加することから、水分子の酸化反応によるものと考えることができる。一方、水の酸化が定常的に進行する電位よりもわずかに低い電位では、3620 cm-1に水素結合していない水に帰属される吸収が観測された。この水素結合していない水の吸収の出現は、酸化チタンのバンドギャップを励起すると電極界面における水素結合ネットワークが切断されることを意味している。従来、酸化チタンに光を照射すると超親水性が発現されるので界面の水素結合ネットワークは強くなると考えられてきた。しかし、水の酸化反応が進行する際には、水分子に正孔が移動して生成するOHラジカルやH2O2などの反応中間体との相互作用により、界面の水素結合ネットワークは逆に弱くなることを、時間分解赤外分光観察によりはじめて明らかにした。

Research Progress Status

平成29年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

平成29年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] POSTECH(韓国)
• [Int'l Joint Research] Mindanao State University(フィリピン)
• [Int'l Joint Research] 中興大学(台湾)
• [Journal Article] Effect of CuFe2O4 ferrite on photocatalysis and carrier dynamics of electrospun α-Fe2O3 nanofibers by time-resolved transient absorption spectroscopy (2019)
  • Author(s): Hung Pei-Hsuan、Vequizo Junie Jhon M.、Wu Ren-An、Yamakata Akira、Tseng Wenjea J.
  • Journal Title: Ceramics International Volume: － Issue: 12 Pages: 15676-15680
  • DOI: 10.1016/j.ceramint.2019.05.080
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Improvement of photocatalytic activity under visible-light irradiation by heterojunction of Cu ion loaded WO3 and Cu ion loaded N-TiO2 (2019)
  • Author(s): Iihoshi Tomoya、Ohwaki Takeshi、Vequizo Junie Jhon M.、Yamakata Akira
  • Journal Title: Applied Catalysis B: Environmental Volume: 248 Pages: 249-254
  • DOI: 10.1016/j.apcatb.2019.01.046
  • Peer Reviewed
• [Journal Article] Clear and transparent nanocrystals for infrared-responsive carrier transfer (2019)
  • Author(s): Sakamoto Masanori、Kawawaki Tokuhisa、Kimura Masato、Vequizo Junie Jhon M.、Matsunaga Hironori、Ranasinghe Chandana Sampath Kumara、Yamakata Akira、Matsuzaki Hiroyuki、Furube Akihiro、Teranishi Toshiharu
  • Journal Title: Nature Communications Volume: 10 Issue: 1 Pages: 406-406
  • DOI: 10.1038/s41467-018-08226-2
  • NAID: 120006554836
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Sodium titanium oxide bronze nanoparticles synthesized via concurrent reduction and Na+-doping into TiO2(B) (2019)
  • Author(s): George Hasegawa,* Moeko Tanaka, Junie Jhon M. Vequizo, Akira Yamakata, Hajime Hojo, Makoto Kobayashi, Masato Kakihana, Miki Inada, Hirofumi Akamatsu, Katsuro Hayashi*
  • Journal Title: Nanoscale Volume: in press Issue: 3 Pages: 1442-1450
  • DOI: 10.1039/c8nr08372j
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Curious behaviors of photogenerated electrons and holes at the defects on anatase, rutile, and brookite TiO2 powders: A review (2018)
  • Author(s): Yamakata Akira、Vequizo Junie Jhon M.
  • Journal Title: Journal of Photochemistry and Photobiology C: Photochemistry Reviews Volume: － Pages: 234-243
  • DOI: 10.1016/j.jphotochemrev.2018.12.001
  • Peer Reviewed
• [Journal Article] Plasmonic p-n Junction for Infrared Light to Chemical Energy Conversion (2018)
  • Author(s): Lian Zichao, Sakamoto Masanori, Vequizo Junie J. M., Ranasinghe C. S. Kumara, Yamakata Akira, Nagai Takuro, Kimoto Koji, Kobayashi Yoichi, Tamai Naoto, Teranishi Toshiharu
  • Journal Title: Journal of the American Chemical Society Volume: 141 Issue: 6 Pages: 2446-2450
  • DOI: 10.1021/jacs.8b11544
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Enhanced Photocatalytic NOx Decomposition of Visible-light Responsive F-TiO2/(N,C)-TiO2 by Charge Transfer Between F-TiO2 and (N,C)-TiO2 through their Doping Levels (2018)
  • Author(s): S. KOMATSUDA, Y. ASAKURA, J. J. M. VEQUIZO, A. YAMAKATA, S. YIN
  • Journal Title: Appl. Catal. B: Environ. Volume: 238 Pages: 358-364
  • DOI: 10.1016/j.apcatb.2018.07.038
  • Peer Reviewed
• [Journal Article] Expansion of the photoresponse window of a BiVO4 photocatalyst by doping with chromium(vi) (2018)
  • Author(s): Okuno Kazuya、Kato Hideki、Vequizo Junie Jhon M.、Yamakata Akira、Kobayashi Hisayoshi、Kobayashi Makoto、Kakihana Masato
  • Journal Title: RSC Advances Volume: 8 Issue: 67 Pages: 38140-38145
  • DOI: 10.1039/c8ra07830k
  • Peer Reviewed / Open Access
• [Journal Article] A Copolymerization Approach to Improving Ru(II)-Complex/C3N4 Hybrid Photocatalysts for Visible-Light CO2 Reduction (2018)
  • Author(s): Constantine Tsounis, Ryo Kuriki, Kengo Shibata, Junie Jhon M. Vequizo, Daling Lu, Akira Yamakata, Osamu Ishitani, Rose Amal, Kazuhiko Maeda
  • Journal Title: ACS Sustainable Chem. Eng. Volume: 6 Issue: 11 Pages: 15333-15340
  • DOI: 10.1021/acssuschemeng.8b03782
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Effects of Interfacial Electron Transfer in Metal Complex - Semiconductor Hybrid Photocatalysts on Z-scheme CO2 Reduction under Visible Light (2018)
  • Author(s): Akinobu Nakada, Ryo Kuriki, Keita Sekizawa, Shunta Nishioka, Junie Jhon M. Vequizo, Tomoki Uchiyama, Nozomi Kawakami, Daling Lu, Akira Yamakata, Yoshiharu Uchimoto, Osamu Ishitani, Kazuhiko Maeda
  • Journal Title: ACS Catal. Volume: 8 Issue: 10 Pages: 9744-9754
  • DOI: 10.1021/acscatal.8b03062
  • Peer Reviewed
• [Journal Article] Binary flux-promoted formation of trigonal ZnIn2S4 layered crystals using ZnS-containing industrial waste and their photocatalytic performance for H2 production (2018)
  • Author(s): Hojamberdiev Mirabbos、Cai Yanfei、Vequizo Junie Jhon M.、Khan Mohammad Mansoob、Vargas Ronald、Yubuta Kunio、Yamakata Akira、Teshima Katsuya、Hasegawa Masashi
  • Journal Title: Green Chemistry Volume: 20 Issue: 16 Pages: 3845-3856
  • DOI: 10.1039/c8gc01746h
  • Peer Reviewed
• [Journal Article] Excited-State Dynamics of Graphitic Carbon Nitride Photocatalyst and Ultrafast Electron Injection to a Ru(II) Mononuclear Complex for Carbon Dioxide Reduction (2018)
  • Author(s): Ryo Kuriki, Chandana Sampath Kumara Ranasinghe, Yasuomi Yamazaki, Akira Yamakata, Osamu Ishitani, Kazuhiko Maeda
  • Journal Title: J. Phys. Chem. C Volume: 122 Issue: 29 Pages: 16795-16802
  • DOI: 10.1021/acs.jpcc.8b03996
  • Peer Reviewed
• [Journal Article] Homogeneous Electron Doping into Nonstoichiometric Strontium Titanate Improves Its Photocatalytic Activity for Hydrogen and Oxygen Evolution (2018)
  • Author(s): Nishioka Shunta、Hyodo Junji、Vequizo Junie Jhon M.、Yamashita Shunsuke、Kumagai Hiromu、Kimoto Koji、Yamakata Akira、Yamazaki Yoshihiro、Maeda Kazuhiko
  • Journal Title: ACS Catalysis Volume: 8 Issue: 8 Pages: 7190-7200
  • DOI: 10.1021/acscatal.8b01379
  • Peer Reviewed
• [Journal Article] Near Infrared Light Induced Plasmonic Hot Hole Transfer at a Nano-Heterointerface (2018)
  • Author(s): Z. Lian M. Sakamoto H. Matsunaga J. J. M. Vequizo A. Yamakata M. Haruta H. Kurata W. Ota T. Sato T. Teranishi
  • Journal Title: Nat. Commun. Volume: 9 Issue: 1 Pages: 23141-7
  • DOI: 10.1038/s41467-018-04630-w
  • NAID: 120006488580
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Nitrogen/fluorine-codoped rutile titania as a stable oxygen-evolution photocatalyst for solar-driven Z-scheme water splitting (2018)
  • Author(s): Miyoshi Akinobu、Vequizo Junie Jhon?M.、Nishioka Shunta、Kato Yuma、Yamamoto Muneaki、Yamashita Shunsuke、Yokoi Toshiyuki、Iwase Akihide、Nozawa Shunsuke、Yamakata Akira、Yoshida Tomoko、Kimoto Koji、Kudo Akihiko、Maeda Kazuhiko
  • Journal Title: Sustainable Energy & Fuels Volume: 2 Issue: 9 Pages: 2025-2035
  • DOI: 10.1039/c8se00191j
  • Peer Reviewed
• [Journal Article] Undoped Layered Perovskite Oxynitride Li2LaTa2O6N for Photocatalytic CO2 Reduction with Visible Light (2018)
  • Author(s): Oshima, T.、 Ichibha, T、Qin K, S、Muraoka, K.、Vequizo, J. J. M.、Hibino, K.、Kuriki, R.、Yamashita, S.、Hongo, K.、Uchiyama, T.、Fujii, K.、Lu, D.、Maezono, R.、Yamakata, A.、Kato, H.、Kimoto, K.、Yashima, M.、Uchimoto, Y.、Kakihana, M.、Ishitani, O.、Kageyama, H.、Maeda, K.
  • Journal Title: Angewandte Chemie International Edition Volume: 57 Issue: 27 Pages: 8154-8158
  • DOI: 10.1002/anie.201803931
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Characterization of silver species on graphitic carbon nitride nanosheets as promoters for photocatalytic carbon dioxide reduction under visible light with a ruthenium(II) complex (2018)
  • Author(s): Kazuhiko Maeda, Daehyeon An, Chandana Sampath Kumara Ranasinghe, Tomoki Uchiyama, Ryo Kuriki, Tomoki Kanazawa, Daling Lu, Shunsuke Nozawa, Akira Yamakata, Yoshiharu Uchimoto, Osamu Ishitani
  • Journal Title: J. Mater. Chem. A Volume: 印刷中 Issue: 20 Pages: 9708-9715
  • DOI: 10.1039/c8ta03245a
  • Peer Reviewed
• [Journal Article] Structural Changes of Water Molecules during Photoelectrochemical Water Oxidation on TiO2 Thin Film Electrodes (2018)
  • Author(s): S. Chandana, R. Kumara, *A Yamakata
  • Journal Title: Physical Chemistry and Chemical Physics Volume: 20 Issue: 5 Pages: 3388-3394
  • DOI: 10.1039/c7cp06646e
  • Peer Reviewed
• [Journal Article] Oxygen induced enhancement of NIR emission in brookite TiO2 powders: comparison with rutile and anatase TiO2 powders (2018)
  • Author(s): Vequizo Junie Jhon M.、Kamimura Sunao、Ohno Teruhisa、Yamakata Akira
  • Journal Title: Physical Chemistry Chemical Physics Volume: 20 Issue: 5 Pages: 3241-3248
  • DOI: 10.1039/c7cp06975h
  • Peer Reviewed
• [Journal Article] Fabrication of robust TiO2 thin films by atomized spray pyrolysis deposition for photoelectrochemical water oxidation (2018)
  • Author(s): Ranasinghe Chandana Sampath Kumara、Vequizo Junie Jhon M.、Yamakata Akira
  • Journal Title: Journal of Photochemistry and Photobiology A: Chemistry Volume: 358 Pages: 320-326
  • DOI: 10.1016/j.jphotochem.2017.09.006
  • Peer Reviewed
• [Journal Article] Role of CoOx cocatalyst on Ta3N5 photocatalysts studied by transient visible to mid-infrared absorption spectroscopy (2018)
  • Author(s): Vequizo Junie Jhon M.、Hojamberdiev Mirabbos、Teshima Katsuya、Yamakata Akira
  • Journal Title: Journal of Photochemistry and Photobiology A: Chemistry Volume: 358 Pages: 315-319
  • DOI: 10.1016/j.jphotochem.2017.09.005
  • Peer Reviewed
• [Journal Article] Engaging the Flux-Grown La1-xSrxFe1-yTiyO3 Crystals in Visible-Light-Driven Photocatalytic Hydrogen Generation (2017)
  • Author(s): Hojamberdiev Mirabbos、Kawashima Kenta、Kumar Mahesh、Yamakata Akira、Yubuta Kunio、Gurlo Aleksander、Hasegawa Masashi、Domen Kazunari、Teshima Katsuya
  • Journal Title: International Journal of Hydrogen Energy Volume: 42 Issue: 44 Pages: 27024-27033
  • DOI: 10.1016/j.ijhydene.2017.09.036
  • Peer Reviewed
• [Journal Article] Elucidating the impact of A-site cation change on photocatalytic H2 and O2 evolution activities of perovskite-type LnTaON2 (Ln = La and Pr) (2017)
  • Author(s): Hojamberdiev Mirabbos、Bekheet Maged F.、Hart Judy N.、Vequizo Junie Jhon M.、Yamakata Akira、Yubuta Kunio、Gurlo Aleksander、Hasegawa Masashi、Domen Kazunari、Teshima Katsuya
  • Journal Title: Physical Chemistry Chemical Physics Volume: 19 Issue: 33 Pages: 22210-22220
  • DOI: 10.1039/c7cp03714g
  • Peer Reviewed
• [Journal Article] Interfacial Manipulation by Rutile TiO2 Nanoparticles to Boost CO2 Reduction into CO on a Metal-Complex/Semiconductor Hybrid Photocatalyst (2017)
  • Author(s): Keisuke Wada, Chandana Sampath Kumara Ranasinghe, Ryo Kuriki, Akira Yamakata, Osamu Ishitani, Kazuhiko Maeda
  • Journal Title: ACS Appl. Mater. Interfaces Volume: 9 Issue: 28 Pages: 23869-23877
  • DOI: 10.1021/acsami.7b07484
  • Peer Reviewed
• [Journal Article] Trapping-Induced Enhancement of Photocatalytic Activity on Brookite TiO2 Powders: Comparison with Anatase and Rutile TiO2 Powders (2017)
  • Author(s): Vequizo Junie Jhon M.、Matsunaga Hironori、Ishiku Tatsuya、Kamimura Sunao、Ohno Teruhisa、Yamakata Akira
  • Journal Title: ACS Catalysis Volume: 7 Issue: 4 Pages: 2644-2651
  • DOI: 10.1021/acscatal.7b00131
  • Peer Reviewed
• [Journal Article] Solar-driven Z-scheme water splitting using tantalum/nitrogen co-doped rutile titania nanorod as an oxygen evolution photocatalyst (2017)
  • Author(s): A. Nakada, S. Nishioka, J. J. M. Vequizo, K. Muraoka, T. Kanazawa A. Yamakata, S. Nozawa, H. Kumagai, S. Adachi, O. Ishitani, K. Maeda
  • Journal Title: Journal of Materials Chemistry A Volume: . Issue: 23 Pages: 11710-11719
  • DOI: 10.1039/c6ta10541f
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Cation-dependent restructure of the electric double layer on CO-covered Pt electrodes: Difference between hydrophilic and hydrophobic cations (2017)
  • Author(s): Yamakata Akira、Osawa Masatoshi
  • Journal Title: Journal of Electroanalytical Chemistry Volume: 800 Pages: 19-24
  • DOI: 10.1016/j.jelechem.2016.12.034
  • Peer Reviewed
• [Journal Article] Enhancement of photoelectrochemical activity of SnS thin-film photoelectrodes using TiO2, Nb2O5, and Ta2O5metal oxide layers (2016)
  • Author(s): Vequizo Junie Jhon M.、Yokoyama Masanori、Ichimura Masaya、Yamakata Akira
  • Journal Title: Applied Physics Express Volume: 9 Issue: 6 Pages: 067101-067101
  • DOI: 10.7567/apex.9.067101
  • NAID: 210000155729
  • Peer Reviewed
• [Journal Article] The contrasting effect of the Ta/Nb ratio in (111)-layered B-site deficient hexagonal perovskite Ba5Nb4?xTaxO15 crystals on visible-light-induced photocatalytic water oxidation activity of their oxynitride derivatives (2016)
  • Author(s): Hojamberdiev Mirabbos、Bekheet Maged F.、Zahedi Ehsan、Wagata Hajime、Vequizo Junie Jhon M.、Yamakata Akira、Yubuta Kunio、Gurlo Aleksander、Domen Kazunari、Teshima Katsuya
  • Journal Title: Dalton Transactions Volume: 45 Issue: 31 Pages: 12559-12568
  • DOI: 10.1039/c6dt02095j
  • Peer Reviewed
• [Journal Article] 酸化チタン光触媒のキャリアーダイナミクス－粉末におけるアナターゼとルチルの特異的な挙動－ (2016)
  • Author(s): 山方啓
  • Journal Title: 光化学 Volume: 47 Pages: 25-32
  • NAID: 40020839233
  • Peer Reviewed
• [Journal Article] Nature-Inspired, Highly Durable CO2 Reduction System Consisting of a Binuclear Ruthenium(II) Complex and an Organic Semiconductor Using Visible Light (2016)
  • Author(s): Ryo Kuriki, Hironori Matsunaga, Takuya Nakashima, Keisuke Wada, Akira Yamakata, Osamu Ishitani, Kazuhiko Maeda
  • Journal Title: J. Am. Chem. Soc. Volume: 138 Issue: 15 Pages: 5159-5170
  • DOI: 10.1021/jacs.6b01997
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Dynamics of Photogenerated Charge Carriers on Ni- and Ta-Doped SrTiO3 Photocatalysts Studied by Time-Resolved Absorption and Emission Spectroscopy (2016)
  • Author(s): Akira Yamakata, Masayuki Kawaguchi, Ryosuke Murachi, Masahiro Okawa, Itaru Kamiya
  • Journal Title: J. Phys. Chem. C Volume: 120 Issue: 15 Pages: 7997-8004
  • DOI: 10.1021/acs.jpcc.6b01494
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Photocatalytic property of metal ion added SrTiO3 to Overall H2O splitting (2015)
  • Author(s): Yoshihisa Sakata, Yoshiko Miyoshi, Tatsuya Maeda, Kohki Ishikiriyama, Yuki Yamazaki, Hayao Imamura, Yeilin Ham, Takashi Hisatomi, Jun Kubota, Akira Yamakata, Kazunari Domen
  • Journal Title: Applied Catalysis A: General Volume: 印刷中 Pages: 227-232
  • DOI: 10.1016/j.apcata.2015.12.013
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Curious Behaviors of Photogenerated Charge Carriers at the Defects on Powder Photocatalysts (2019)
  • Author(s): Akira Yamakata
  • Organizer: International Workshop on Crystalline Materials and Applications (IWCMA-2019)
  • Int'l Joint Research / Invited
• [Presentation] 高性能光触媒の設計を目指した反応機構の解明 (2019)
  • Author(s): 山方啓
  • Organizer: 中央大学理工学部 研究セミナー
  • Invited
• [Presentation] 各種助触媒担持による層状酸ハロゲン化物光触媒の水分解活性向上 (2019)
  • Author(s): 小川 幹太, 中田明伸, 鈴木肇, 冨田修, 東正信, 山方啓, 佐伯昭紀, 阿部竜
  • Organizer: 第123回触媒討論会
• [Presentation] BiVO4光触媒へのボールミル処理効果 (2019)
  • Author(s): 奥野和哉, Junie Jhon M. Vequizo, 山方啓, 垣花眞人, 加藤英樹
  • Organizer: 第123回触媒討論会
• [Presentation] 酸素分圧制御下で合成した不定比SrTiO3-δの光触媒活性への電子ドーピング効果 (2019)
  • Author(s): 西岡駿太, 兵頭潤次, Junie Jhon M. Vequizo, 山下俊介, 熊谷啓, 木本浩司, 山方啓, 山崎仁丈, 前田和彦
  • Organizer: 第123回触媒討論会
• [Presentation] Trapping-Induced Enhancement of Photocatalytic Activity on TiO2 Powders (2018)
  • Author(s): Akira Yamakata, Junie Jhon M. Vequizo
  • Organizer: International Congress on Pure & Applied Chemistry (ICPAC) 2018
  • Int'l Joint Research / Invited
• [Presentation] Oxygen-Doped Ta3N5 as a Building Block for Z-scheme CO2 Reduction with a Binuclear Ru(II) Complex Workable under a Wide Range of Visible Light (2018)
  • Author(s): Kanemichi Muraoka, Junie Jhon M. Vequizo, Akira Yamakata, Osamu Ishitani, Kazuhiko Maeda
  • Organizer: 日本化学会第98春季年会
• [Presentation] Improvement of photocatalytic activity under visible light irradiation by composite with Cu/WO3 and Cu/N-TiO2. (2018)
  • Author(s): Takeshi Ohwaki, Akira Yamakata, Junie Jhon M. Vequizo, Tomoya IIhoshi
  • Organizer: 日本化学会第98春季年会
• [Presentation] Synthesis and photocatalytic activity of a layered perovskite oxynitride Li2LaTa2O6N (2018)
  • Author(s): Takayoshi Oshima, Kanemichi Muraoka, Junie Jhon M. Vequizo, Shunsuke Yamashita, Akira Yamakata, Koji Kimoto, Osamu Ishitani, Kazuhiko Maeda
  • Organizer: 日本化学会第98春季年会
• [Presentation] C3N4の光励起キャリアダイナミクスと錯体触媒への電子移動過程の観察 (2018)
  • Author(s): 栗木亮, Chandana Sampath Kumara Ranasinghe, 山方啓, 石谷治, 前田和彦
  • Organizer: 第121回触媒討論会
• [Presentation] How the Defects Affects the Photocatalytic Activity on Powder and Single Crystalline TiO2 (2018)
  • Author(s): Akira Yamakata
  • Organizer: International Conference on Ceramic Materials and Components for Energy and Environmental Applications (CMCEE 2018)
  • Int'l Joint Research / Invited
• [Presentation] Defects Induced Enhancement of Ga2O3 Based Photocatalysts Studied by Time-Resolved Absorption Spectroscopy (2018)
  • Author(s): Akira Yamakata, Junie Jhon M. Vequizo, Yoshihisa Sakata
  • Organizer: 2018 International Symposium on Advancement and Prospect of Catalysis Science & Technology
  • Int'l Joint Research / Invited
• [Presentation] The Role of Powder Defects for Efficient Photocatalytic Reactions (2018)
  • Author(s): Akira Yamakata, Junie Jhon M. Vequizo
  • Organizer: The 22nd International Conference on Photochemical Conversion and Storage of Solar Energy (IPS-22)
  • Int'l Joint Research / Invited
• [Presentation] Remarkable Activity Enhancement of Ca and Zn Doped Ga2O3 Photocatalysts Studied by Transient Absorption Spectroscopy (2018)
  • Author(s): Junie Jhon M. Vequizo, Shouta Ishiyama, Yoshihisa Sakata, Akira Yamakata
  • Organizer: The 22nd International Conference on Photochemical Conversion and Storage of Solar Energy (IPS-22)
  • Int'l Joint Research
• [Presentation] Effects of Surface Defects on Powder Photocatalysts Studied by Time-resolved Visible to Mid-IR Absorption Spectroscopy (2018)
  • Author(s): Akira Yamakata, Junie Jhon M. Vequizo
  • Organizer: International Workshop on Water Splitting: Challenges and Opportunity
  • Int'l Joint Research / Invited
• [Presentation] Synthesis of 2D perovskite oxynitride Li2LaTa2O6N and the photocatalytic performance for CO2 reduction (2018)
  • Author(s): Takayoshi Oshima, Kanemichi Muraoka, Junie Jhon M. Vequizo, Sunsuke Yamashita, Akira Yamakata, Koji Kimoto, Osamu Ishitani, Kazuhiko Maeda
  • Organizer: The 8th Tokyo Conference on Advanced Catalytic Science and Technology (TOCAT8)
  • Int'l Joint Research
• [Presentation] Effects of electron doping with oxygen defect introduction on photocatalytic hydrogen/oxygen evolution activity of non-stoichiometric SrTiO3-δ (2018)
  • Author(s): Shunta Nishioka, Junji Hyodo, Junie Jhon M. Vequizo, Shunsuke Yamashita, Hiromu Kumagai, Koji Kimoto, Akira Yamakata, Yoshihiro Yamazaki, Kazuhiko Maeda
  • Organizer: The 8th Tokyo Conference on Advanced Catalytic Science and Technology (TOCAT8)
  • Int'l Joint Research
• [Presentation] Oxygen-doped Ta3N5 modified with a Ru(II) binuclear complex having the ability to reduce CO2 under a wide range of visible light (2018)
  • Author(s): Kanemichi Muraoka, Junie Jhon M. Vequizo, Akira Yamakata, Osamu Ishitani, Kazuhiko Maeda
  • Organizer: The 8th Tokyo Conference on Advanced Catalytic Science and Technology (TOCAT8)
  • Int'l Joint Research
• [Presentation] Nitrogen/fluorine codoped rutile titanium(IV) oxide as a visible-light-driven photocatalyst for water oxidation (2018)
  • Author(s): Akinobu Miyoshi, Yuma Kato, Junie Jhon M. Vequizo, Shunsuke Yamashita, Shunsuke Nozawa, Akira Yamakata, Tomoko Yoshida, Koji Kimoto, Kazuhiko Maeda
  • Organizer: The 8th Tokyo Conference on Advanced Catalytic Science and Technology (TOCAT8)
  • Int'l Joint Research
• [Presentation] Photocatalytic CO2 reduction under visible light using carbon nitride and a binuclear Ru(II) complex (2018)
  • Author(s): Ryo Kuriki, Akira Yamakata, Osamu Ishitani, Kazuhiko Maeda
  • Organizer: The 8th Tokyo Conference on Advanced Catalytic Science and Technology (TOCAT8)
  • Int'l Joint Research
• [Presentation] Behavior of Photogenerated Charge Carriers on Highly Efficient Photocatalysts (2018)
  • Author(s): Akira Yamakata, Junie Jhon M. Vequizo
  • Organizer: The 8th Advanced Functional Materials and Devices (AFMD 2018)
  • Int'l Joint Research / Invited
• [Presentation] ソルボサーマル反応をベースとした光触媒コンポジットの合成と活性向上 (2018)
  • Author(s): 小松田紫央, 朝倉裕介, Junie Jhon M. Vequizo, 山方啓, 殷シュウ
  • Organizer: (公社) 日本セラミックス協会 第31回秋季シンポジウム 特定セッション 水溶液プロセスが可能にするセラミックス合成
• [Presentation] 時間分解分光測定を利用した高活性光触媒の反応機構解明 (2018)
  • Author(s): 山方啓, Junie Jhon M. Vequizo
  • Organizer: (公社) 日本セラミックス協会 第31回秋季シンポジウム 特定セッション 先進的な構造科学と分析技術
  • Invited
• [Presentation] Synthesis of nitrogen/fluorine codoped rutile TiO2 photocatalyst and its application for Z-scheme water splitting (2018)
  • Author(s): Akinobu Miyoshi, Junie Jhon M. Vequizo, Shunta Nishioka, Shunsuke Yamashita, Akihide Iwase, Shunsuke Nozawa, Akira Yamakata, Koji Kimoto, Akihiko Kudo, Kazuhiko Maeda
  • Organizer: 2018年光化学討論会
• [Presentation] Dynamics of photocarriers in reduced TiO2 studied by transient visible to mid-IR absorption spectroscopy (2018)
  • Author(s): Junie Jhon M. Vequizo, Fumiaki Amano, Akira Yamakata
  • Organizer: 2018年光化学討論会
• [Presentation] 光触媒粒子における電子のトラップ過程と蓄積過程 (2018)
  • Author(s): 山方啓, Junie Jhon M. Vequizo, 岡村翔, 白木恭平
  • Organizer: 第12回分子科学討論会
• [Presentation] 金属酸窒化物光触媒における光励起キャリアーの過渡吸収 (2018)
  • Author(s): 山方啓, Junie Jhon M. Vequizo, Mirabbos Hojamberdiev, Shanshan Chen, 手島勝弥, 堂免一成
  • Organizer: 第122回触媒討論会
• [Presentation] Impact of Cocatalyst on the Dynamics of Photocarriers in Ga2O3 Powders Studied by Time-Resolved Absorption Spectroscopy (2018)
  • Author(s): Junie Jhon M. Vequizo, Shouta Ishiyama, Yoshihisa Sakata, Akira Yamakata
  • Organizer: 第122回触媒討論会
• [Presentation] Electron Transfer to Water Molecules on Rh-loaded Ga2O3 Photocatalysts (2018)
  • Author(s): Junie Jhon M. Vequizo, Shoya Tsuboi, Shouta Ishiyama, Yoshihisa Sakata, Akira Yamakata
  • Organizer: グリーン電子素子・材料研究センター 最終年度シンポジウム
• [Presentation] 過渡吸収分光測定を用いた光触媒粒子の光励起ダイナミクス (2018)
  • Author(s): 山方啓
  • Organizer: 第49回中部化学関係学協会支部連合秋季大会
  • Invited
• [Presentation] ポンププローブ法による界面ダイナミクス (2018)
  • Author(s): 山方啓
  • Organizer: 2018年電気化学会関東支部セミナー 先端計測技術による電極界面分析の新展開
  • Invited
• [Presentation] 高活性光触媒の実現を目指した新しい分光測定技術の開発 (2018)
  • Author(s): 山方啓
  • Organizer: 第11回ワークショップ 固体材料合成および評価技術の新展開
  • Invited
• [Presentation] Time-resolved Absorption Study on the Behavior of Photogenerated Electrons and Holes in Highly Active Photocatalysts (2018)
  • Author(s): Akira Yamakata, Junie Jhon M. Vequizo
  • Organizer: Functional Ceramics forum for the upcoming Annual Materials Science Conference
  • Int'l Joint Research / Invited
• [Presentation] Curious Behavior of Photogenerated Electrons and Holes in Single-crystalline and Powder Photocatalysts (2018)
  • Author(s): Akira Yamakata
  • Organizer: Research Seminar at National Chung Hsing University
  • Int'l Joint Research / Invited
• [Presentation] Time-Resolved Visible to mid-IR Absorption Study of Photodynamics on Powder Photocatalysts (2018)
  • Author(s): Akira Yamakata
  • Organizer: Research Seminar at National Chiao Tung University
  • Int'l Joint Research / Invited
• [Presentation] 超高活性Ga2O3系水分解光触媒の光励起ダイナミクス (2018)
  • Author(s): 山方啓, Junie Jhon M. Vequizo, 石山翔太, 酒多喜久
  • Organizer: 表面・界面スペクトロスコピー2018
• [Presentation] 時間分解分光測定による高活性光触媒反応のメカニズム解明 (2018)
  • Author(s): 山方啓
  • Organizer: 熊本大学工学部研究セミナー
  • Invited
• [Presentation] Photocatalytic Activity of Oxygen Deficient SrTiO3-d Prepared by Reduced Atmosphere Calcination (2017)
  • Author(s): Shunta Nishioka, Junji Hyodo, Akira Yamakata, Yoshihiro Yamazaki, Kazuhiko Maeda
  • Organizer: 16th Korea-Japan Symposium on Catalysis & 3rd International Symposium of Institute for Catalysis
  • Int'l Joint Research
• [Presentation] Behavior of Photogenerated Charge Carriers in BiVO4 Based Heterojunctions (2017)
  • Author(s): Chandana Sampath Kumara Ranasinghe, Akira Yamakata
  • Organizer: 16th Korea-Japan Symposium on Catalysis & 3rd International Symposium of Institute for Catalysis
  • Int'l Joint Research
• [Presentation] Dynamics of Photocarriers in Ga2O3-based Photocatalyst Studied by Transient Absorption Spectroscopy (2017)
  • Author(s): Junie Jhon M. Vequizo, Shouta Ishiyama, Yoshihisa Sakata, Akira Yamakata
  • Organizer: 16th Korea-Japan Symposium on Catalysis & 3rd International Symposium of Institute for Catalysis
  • Int'l Joint Research
• [Presentation] Water Splitting and CO2 Fixation on Visible-Light-Responsive Rutile TiO2-based Photocatalysts (2017)
  • Author(s): Kazuhiko Maeda, Akinobu Nakada, Koki Ishimaki, Junie Jhon M. Vequizo, Akira Yamakata, Osamu Ishitani
  • Organizer: 16th Korea-Japan Symposium on Catalysis & 3rd International Symposium of Institute for Catalysis
  • Int'l Joint Research
• [Presentation] Difference in the Behavior of Photogenerated Electrons and Holes on Anatase and Rutile TiO2 Powders (2017)
  • Author(s): Akira Yamakata, Junie Jhon M. Vequizo, Hironori Matsunaga
  • Organizer: 16th Korea-Japan Symposium on Catalysis & 3rd International Symposium of Institute for Catalysis
  • Int'l Joint Research
• [Presentation] Behaviors of Photogenerated Electrons and Holes in Photoelectrochemical Interfaces (2017)
  • Author(s): Akira Yamakata
  • Organizer: International Symposium on Pure & Applied Chemistry (ISPAC) 2017
  • Int'l Joint Research / Invited
• [Presentation] Reaction dynamics at the liquid/solid soft-interfaces (2017)
  • Author(s): Akira Yamakata
  • Organizer: KAKENHI International Symposium on “Studying the Function of Soft Molecular Systems”
  • Int'l Joint Research / Invited
• [Presentation] 金属酸窒化物複合アニオン型光触媒のキャリアーダイナミクス (2017)
  • Author(s): 山方啓
  • Organizer: 新学術領域研究 (平成28-32年度) 複合アニオン化合物の創製と新機能 第2回トピカル会議 (機能)
  • Invited
• [Presentation] Effects of the Preparation Methods of Na ion Doped SrTiO3 to the Photocatalytic Property of Overall H2O Splitting (2017)
  • Author(s): Kohki Ishikiriyama, Yosuke Goto, Takashi Hisatomi, Toshiya Yokogawa, Akira Yamakata, Yoshihisa Sakata, Kazunari Domen
  • Organizer: 13th European Congress on Catalysis (EUROPACAT 2017)
  • Int'l Joint Research
• [Presentation] Influences of the Metal Ion Addition to Ga2O3 to the Photocatalytic Property of Overall H2O Splitting (2017)
  • Author(s): Shota Ishiyama, Shiqi Zhang, Akira Yamakata, Toshiya Yokogawa, Yoshihisa Sakata
  • Organizer: 13th European Congress on Catalysis (EUROPACAT 2017)
  • Int'l Joint Research
• [Presentation] Development of hybrid photocatalysts for visible-light CO2 reduction using carbon nitride and a binuclear Ru(II) complex (2017)
  • Author(s): Ryo Kuriki, Akira Yamakata, Osamu Ishitani, Kazuhiko Maeda
  • Organizer: 2017年光化学討論会
• [Presentation] Fabrication of Highly Efficient TiO2 Photoanodes by Atomized Spray Pyrolysis Deposition (2017)
  • Author(s): Chandana Sampath Kumara Ranasinghe, Akira Yamakata
  • Organizer: 2017年光化学討論会
• [Presentation] Dynamics of Photocarriers in Metal Ion Doped Ga2O3 Photocatalysts Studied by Transient Absorption Spectroscopy (2017)
  • Author(s): Junie Jhon M. Vequizo, Shouta Ishiyama, Yoshihisa Sakata, Akira Yamakata
  • Organizer: 2017年光化学討論会
• [Presentation] 金属イオン添加Ga2O3光触媒のH2O完全分解反応に対する光触媒特性 (2017)
  • Author(s): 石山翔太, 横川俊哉, 山方啓, 酒多喜久
  • Organizer: 第120回触媒討論会
• [Presentation] コバルト酸化物を担持した酸化チタンのキャリアーダイナミクス (2017)
  • Author(s): 汪雨濃, Junie Jhon M. Vequizo, 岡崎めぐみ, 前田和彦, 山方啓
  • Organizer: 第120回触媒討論会
• [Presentation] Behavior of Photogenerated Charge Carriers in SnO2/BiVO4/CoOx Heterostructure Studied by Transient Absorption Spectroscopy (2017)
  • Author(s): Chandana Sampath Kumara Ranasinghe, Akira Yamakata
  • Organizer: 第120回触媒討論会
• [Presentation] Effects of Metal Ion-Doping on Ga2O3 Photocatalysts Studied by Transient Absorption Spectroscopy (2017)
  • Author(s): Junie Jhon M. Vequizo, Shouta Ishiyama, Yoshihisa Sakata, Akira Yamakata
  • Organizer: 第120回触媒討論会
• [Presentation] 金属イオンをドープしたGa2O3の光励起ダイナミクス (2017)
  • Author(s): 山方啓, Junie Jhon M. Vequizo, 石山翔太, 酒多喜久
  • Organizer: 第11回分子科学討論会
• [Presentation] Transient Absorption Study of Photogenerated Charge Carriers in Electrochemical Systems (2017)
  • Author(s): Chandana Sampath Kumara Ranasinghe, Akira Yamakata
  • Organizer: スマートエネルギー技術研究センター 第10回シンポジウム
• [Presentation] Effects of Surface Modification on Powder Photocatalysts Studied by Transient Absorption Spectroscopy (2017)
  • Author(s): Junie Jhon M. Vequizo, Chandana Sampath Kumara Ranasinghe, Shouta Ishiyama, Yoshihisa Sakata, Akira Yamakata
  • Organizer: スマートエネルギー技術研究センター 第10回シンポジウム
• [Presentation] 超高活性Ga2O3系水分解光触媒の反応機構 (2017)
  • Author(s): 山方啓
  • Organizer: スマートエネルギー技術研究センター 第10回シンポジウム
• [Presentation] Impact of Metal Ion Doping on Ga2O3 Photocatalysts Studied by Transient Absorption Spectroscopy (2017)
  • Author(s): Junie Jhon M. Vequizo, Akira Yamakata
  • Organizer: 2017 ASEAN Conference on Advanced Functional Materials and Nanotechnology (ASEAN-AFMN)
  • Int'l Joint Research / Invited
• [Presentation] Mechanism of Photocatalytic Reactions on TiO2 Powders (2017)
  • Author(s): Akira Yamakata
  • Organizer: 19th SPVM National Physics Conference, 2017 ASEAN Conference on Advanced Functional Materials and Nanotechnology (ASEAN-AFMN), and 5th International Meeting on Complex Systems (IMCS)
  • Int'l Joint Research / Invited
• [Presentation] Carrier Dynamics on TiO2 Powders Studied by Time-Resolved IR Absorption Spectroscopy (2017)
  • Author(s): Pei-Hsuan Hung, Junie Jhon M. Vequizo, Akira Yamakata, Wenjea J. Tseng
  • Organizer: 6th International Symposium on Advanced Ceramics and Technology for Sustainable Energy Applications toward a Low Carbon Society (ACTSEA 2017)
  • Int'l Joint Research
• [Presentation] Trapping States and Behavior of Photocarriers in Brookite TiO2 Powders Studied by Transient Absorption and Emission Spectroscopies (2017)
  • Author(s): Junie Jhon M. Vequizo, Hironori Matsunaga, Teruhisa Ohno, Akira Yamakata
  • Organizer: The 6th Toyota RIKEN International Workshop 2017
  • Int'l Joint Research
• [Presentation] Behaviors of Electrons and Holes in Photocatalysts Studied by Time-resolved Visible to Mid-IR Absorption Spectroscopy (2017)
  • Author(s): Akira Yamakata
  • Organizer: International Conference on Photochemistry and Its Applications (ICPA 2017)
  • Int'l Joint Research / Invited
• [Presentation] Behaviors of Photogenerated Electrons and Holes on TiO2 Powder Photocatalysts (2017)
  • Author(s): Akira Yamakata, Junie Jhon M. Vequizo, Hironori Matsunaga
  • Organizer: The 22nd International Conference on Semiconductor Photocatalysis and Solar Energy Conversion (SPASEC-22)
  • Int'l Joint Research / Invited
• [Presentation] Principal Difference in the Behaviors of Photogenerated e- and h+ in Anatase and Rutile TiO2 Powders (2017)
  • Author(s): Akira Yamakata
  • Organizer: 東京大学第5回伊藤国際学術研究センター会議 (IIRC5) －Forefront of Molecular Dynamics at Surfaces and Interfaces: From a single molecule to catalytic reaction－
  • Int'l Joint Research
• [Presentation] 酸素空孔濃度および電子濃度を制御したSrTiO3における光触媒特性 －欠陥化学と光化学反応－ (2017)
  • Author(s): 兵頭潤次, 西岡駿太, 熊谷啓, 前田和彦, Junie Jhon M. Vequizo, 山方啓, 山崎仁丈
  • Organizer: 第43回固体イオニクス討論会
• [Presentation] Photodynamics of Brookite TiO2 Photocatalyst Studied by Time-resolved Vis to mid-IR Absorption Spectroscopy (2017)
  • Author(s): Junie Jhon M. Vequizo, Hironori Matsunaga, Sunao Kamimura, Teruhisa Ohno, Akira Yamakata
  • Organizer: Artificial Photosynthesis: Faraday Discussion
  • Int'l Joint Research
• [Presentation] Behavior of photogenerated electrons and holes at the defects on anatase and rutile TiO2 powders studied by transient absorption spectroscopy from visible to mid-IR region (2017)
  • Author(s): Akira Yamakata, Junie Jhon M. Vequizo, Hironori Matsunaga
  • Organizer: 2017 International Conference on Artificial Photosynthesis (ICARP2017)
  • Int'l Joint Research
• [Presentation] 光励起キャリアーの動きとエネルギー制御 (2017)
  • Author(s): 山方啓
  • Organizer: JSTさきがけ 「光エネルギーと物質変換」 第3期研究者研究成果報告会
  • Int'l Joint Research
• [Presentation] Visible-light-driven photocatalytic CO2 reduction reaction using hybrid with an organic semiconductor and a Ru(II) binuclear complex (2017)
  • Author(s): Ryo Kuriki, Akira Yamakata, Osamu Ishitani, Kazuhiko Maeda
  • Organizer: 日本化学会第97春季年会
• [Presentation] Time-resolved Absorption Study on the Behavior of Photogenerated Charge Carriers in Visible-Light Active Photoelectrochemical Systems (2017)
  • Author(s): Chandana Sampath Kumara Ranasinghe, Akira Yamakata
  • Organizer: 「スマートエネルギー技術研究センター」 第9回シンポジウム
• [Presentation] Enhancement of Photocatalytic Activity in BiVO4 Based Visible Active Photoanodes (2017)
  • Author(s): Chandana Sampath Kumara Ranasinghe, Akira Yamakata
  • Organizer: 先進触媒開発研究センター 第1回シンポジウム
• [Presentation] Photodynamics of Anatase, Rutile and Brookite TiO2 Powders Studied by Transient Absorption Spectroscopy (2017)
  • Author(s): Junie Jhon M. Vequizo, Hironori Matsunaga, Akira Yamakata, Teruhisa Ohno
  • Organizer: 「スマートエネルギー技術研究センター」 第9回シンポジウム
• [Presentation] Distinctive Behavior of Photocarriers in TiO2 Powders (Anatase, Rutile, and Brookite) Studied by Transient Absorption Spectroscopy (2017)
  • Author(s): Junie Jhon M. Vequizo, Hironori Matsunaga, Akira Yamakata, Teruhisa Ohno
  • Organizer: 先進触媒開発研究センター 第1回シンポジウム
• [Presentation] 半導体光触媒の光励起ダイナミクス (2017)
  • Author(s): 山方啓
  • Organizer: 先進触媒開発研究センター 第1回シンポジウム
• [Presentation] フェムト秒時間分解分光法による単結晶と粉末TiO2の光励起キャリアの挙動とエネルギー状態 (2017)
  • Author(s): 松永大典, Junie Jhon M. Vequizo, 山方啓
  • Organizer: 先進触媒開発研究センター 第1回シンポジウム
• [Presentation] Caイオンを添加したGa2O3のH2O完全分解反応に対する光触媒特性 (2017)
  • Author(s): 石山翔太, 張仕麒, 横川俊哉, 山方啓, 酒多喜久
  • Organizer: 第119回触媒討論会
• [Presentation] Time-resolved IR absorption study of photogenerated charge carrier dynamics in BiVO4/SnO2 and BiVO4/CoOX hetero junctions (2016)
  • Author(s): Chandana Sampath Kumara Ranasinghe, Akira Yamakata
  • Organizer: 4th Conference on Sri Lanka - Japan Collaborative Research - 2016 (SLJCR2016)
  • Int'l Joint Research
• [Presentation] Dynamics of Photocarriers of Brookite TiO2 Studied by Spectroscopic Techniques: A Comparison with Anatase and Rutile TiO2 Photocatalysts (2016)
  • Author(s): Junie Jhon M. Vequizo, Hironori Matsunaga, Teruhisa Ohno, Akira Yamakata
  • Organizer: 第26回日本MRS年次大会
  • Int'l Joint Research
• [Presentation] Dynamics of Photocarriers of Metal Nitrides/Oxynitrides Studied by Transient Absorption Spectroscopy: Controlling the Effects of Defects (2016)
  • Author(s): Junie Jhon M. Vequizo, Akira Yamakata, Mirabbos Hojamberdiev, Kenta Kawashima, Hajime Wagata, Kunio Yubuta, Shuji Oishi, Kazunari Domen, Katsuya Teshima
  • Organizer: 2016 International Conference on Materials Science and Nanotechnology (ICMSN)
  • Int'l Joint Research
• [Presentation] Behavior of Photogenerated Electrons and Holes on Anatase and Rutile TiO2 Powders (2016)
  • Author(s): Akira Yamakata
  • Organizer: Collaborative Conference on 3D and Materials Research (CC3DMR) 2016
  • Int'l Joint Research / Invited
• [Presentation] Curious Behaviors of Photogenerated e- and h+ in Anatase and Rutile TiO2 Powders (2016)
  • Author(s): Akira Yamakata
  • Organizer: IKM International Symposium on Pure & Applied Chemistry (ISPAC) 2016
  • Int'l Joint Research / Invited
• [Presentation] Transient Absorption Study of Photogenerated Charge Carriers in Electrochemical Systems (2016)
  • Author(s): Chandana Sampath Kumara Ranasinghe, Akira Yamakata
  • Organizer: 第118回触媒討論会
• [Presentation] 柔らかな固液界面における化学反応ダイナミクス －TiO2 光電極における光励起ダイナミクス－ (2016)
  • Author(s): Chandana Sampath Kumara Ranasinghe, Akira Yamakata
  • Organizer: 新学術領域研究 柔らかな分子系 第4回公開シンポジウム
• [Presentation] Photogenerated Electron-Hole Dynamics in BiVO4 Based Photoelectrodes (2016)
  • Author(s): Chandana Sampath Kumara Ranasinghe, Akira Yamakata
  • Organizer: 「スマートエネルギー技術研究センター」 第8回シンポジウム
• [Presentation] Behaviors of Photogenerated Electrons and Holes in SnO2/BiVO4/CoOx Heterojunctions (2016)
  • Author(s): Chandana Sampath Kumara Ranasinghe, Akira Yamakata
  • Organizer: 第16回日本表面科学会中部支部 学術講演会
• [Presentation] Transient Absorption and FT-IR Analysis of the Carrier Dynamics of TiO2 Photocatalysts (2016)
  • Author(s): Junie Jhon M. Vequizo, Hironori Matsunaga, Shou Okamura, Teruhisa Ohno, Akira Yamakata
  • Organizer: 第36回表面科学学術講演会
• [Presentation] Dynamics of Photocarriers of Brookite TiO2 Photocatalyst Studied by Transient Absorption and Emission Spectroscopy (2016)
  • Author(s): Junie Jhon M. Vequizo, Hironori Matsunaga, Akira Yamakata, Teruhisa Ohno
  • Organizer: 「スマートエネルギー技術研究センター」 第8回シンポジウム
• [Presentation] Transient Visible to Mid-IR Absorption Spectroscopic Analysis of the Dynamics of Photocarriers in Metal Nitride/Oxynitride Photocatalysts (2016)
  • Author(s): Junie Jhon M. Vequizo, Akira Yamakata, Mirabbos Hojamberdiev, Kenta Kawashima, Hajime Wagata, Kunio Yubuta, Shuji Oishi, Kazunari Domen, Katsuya Teshima
  • Organizer: 第118回触媒討論会
• [Presentation] ブルッカイト酸化チタンのキャリアーダイナミクス (2016)
  • Author(s): Junie Jhon M. Vequizo, 松永大典, 山方啓, 横野照尚
  • Organizer: 第35回光がかかわる触媒化学シンポジウム
• [Presentation] 有機半導体と金属錯体との複合体を光触媒とした可視光駆動型CO2還元光触媒反応 (2016)
  • Author(s): 栗木亮, 松永大典, 中島拓哉, 山方啓, 石谷治, 前田和彦
  • Organizer: 第118回触媒討論会
• [Presentation] 半導体光触媒の光励起ダイナミクス (2016)
  • Author(s): 山方啓
  • Organizer: 第2回 「半導体による太陽光－水素エネルギー変換技術研究会」
• [Presentation] 時間分解分光測定を利用した金属微粒子を担持した光触媒のキャリアーダイナミクス (2016)
  • Author(s): 山方啓
  • Organizer: 第36回表面科学学術講演会
• [Presentation] 新しい分光技術を利用した光触媒反応の機構解明 (2016)
  • Author(s): 山方啓
  • Organizer: 山口大学 光・エネルギー研究センターシンポジウム 光科学が生み出す新しい世界－光制御と分光技術の最前線－
• [Presentation] 時間分解可視赤外分光法を用いた粉末酸化チタンのキャリアーダイナミクス (2016)
  • Author(s): 山方啓, Junie Jhon M. Vequizo, 松永大典
  • Organizer: 第10回分子科学討論会2016
• [Presentation] フェムト秒時間分解分光法を用いたTiO2 粉末と単結晶のキャリアダイナミクス (2016)
  • Author(s): 松永大典, Junie Jhon M. Vequizo, 山方啓
  • Organizer: 2016年光化学討論会
• [Presentation] フェムト秒時間分解分光法による酸化チタン光触媒のキャリアダイナミクス (2016)
  • Author(s): 松永大典, Junie Jhon M. Vequizo, 山方啓
  • Organizer: 2016年電気化学会北海道支部・東海支部合同シンポジウム
• [Presentation] フェムト秒時間分解分光測定を用いた光触媒のキャリアダイナミクス (2016)
  • Author(s): 松永大典, Junie Jhon M. Vequizo, 山方啓
  • Organizer: 第36回表面科学学術講演会
• [Presentation] フェムト秒時間分解分光測定を用いた酸化チタン表面欠陥におけるキャリアダイナミクス (2016)
  • Author(s): 松永大典, Junie Jhon M. Vequizo, 山方啓
  • Organizer: 第16回日本表面科学会中部支部 学術講演会
• [Presentation] 柔らかな固液界面における化学反応ダイナミクス －フェムト秒時間分解分光法による光触媒の光励起ダイナミクス－ (2016)
  • Author(s): 松永大典, 山方啓
  • Organizer: 新学術領域研究 柔らかな分子系 第4回公開シンポジウム
• [Presentation] 酸素欠陥濃度を制御した不定比SrTiO3-δの水分解光触媒活性 (2016)
  • Author(s): 西岡駿太 兵頭潤次 山方啓 山崎仁丈 前田和彦
  • Organizer: 第35回光がかかわる触媒化学シンポジウム
• [Presentation] 酸素欠損型不定比SrTiO3-δの水分解光触媒活性 (2016)
  • Author(s): 西岡駿太, 兵頭潤次, 山方啓, 山崎仁丈, 前田和彦
  • Organizer: 第118回触媒討論会
• [Book] エネルギー変換型光触媒；コラム 9 「時間分解過渡吸収分光法によるキャリアダイナミクスの解明」 (2017)
  • Author(s): 日本化学会、久富 隆史、久保田 純、堂免 一成；山方啓 (コラム執筆)
  • Total Pages: 136
  • Publisher: 共立出版
  • ISBN: 9784320044623
• [Book] 『光触媒/光半導体を利用した人工光合成 ～最先端科学から実装技術への発展を目指して～』第3編第5章 (2017)
  • Author(s): 山方啓 (章著)
  • Total Pages: 238
  • Publisher: ㈱エヌ・ティー・エス
• [Patent(Industrial Property Rights)] 構造物及びその製造方法 (2018)
  • Inventor(s): 山方啓
  • Industrial Property Rights Holder: 山方啓
  • Industrial Property Rights Type: 特許
  • Filing Date: 2018
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