2020 Fiscal Year Annual Research Report
Project Area | Synthesis of Mixed Anion Compounds toward Novel Functionalities |
Project/Area Number |
16H06441
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Research Institution | Tokyo Institute of Technology |
Principal Investigator |
前田 和彦 東京工業大学, 理学院, 准教授 (40549234)
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Co-Investigator(Kenkyū-buntansha) |
長谷川 哲也 東京大学, 大学院理学系研究科(理学部), 教授 (10189532)
田部 勢津久 京都大学, 人間・環境学研究科, 教授 (20222119)
松石 聡 東京工業大学, 元素戦略研究センター, 准教授 (30452006)
内本 喜晴 京都大学, 人間・環境学研究科, 教授 (50193909)
森 孝雄 国立研究開発法人物質・材料研究機構, 機能性材料研究拠点, グループリーダー (90354430)
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Project Period (FY) |
2016-06-30 – 2021-03-31
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Keywords | 光触媒 / 電池活物質 / 熱電材料 / 蛍光体 / 光電極 / 磁性体 |
Outline of Annual Research Achievements |
光触媒: 前田、桑原(A02分担)との協働により、N/F共ドープルチル型TiO2 (TiO2:N,F)について計算化学と実験を組み合わせた研究を行い、N/F共ドープにおけるNとFそれぞれの役割を実験および計算の双方から明らかにした。また実験においては、ルチル型TiO2:N,Fナノ粒子の合成法を最適化し、代表的な酸素生成光触媒であるBiVO4に匹敵する活性を示すことを見出した。 電池材料: 内本、陰山(A01分担)が中心となり、マンガン系の層状ペロブスカイト酸フッ化物が従来のリチウム電池に匹敵するほどの高容量を示すことを発見した。この発見により、従来のリチウム電池からフッ素電池へのパラダイムシフトをもたらす展開も見えつつある。 蛍光体: 松石が合成した新規酸水素化物Sr3-xAxAlO4H (A = Ca, Ba) において、ヒドリドイオン混合配位による高い電子雲膨張効果の結果、賦活されたCe3+やEu2+の最低5d励起準位の低エネルギー化が起こることを発見した。この結果、同構造の酸フッ化物ホストと比べて、励起帯・発光帯が長波長側にシフトすることを認めた。さらに田部らは、K2MgH4 とKMgH3をホスト材料に用いて、ヒドリドイオンがもたらす電子雲膨張効果をホストの結晶構造の観点から明らかとした。 熱電材料: 森が中心となり、熱電性能の極めて低い絶縁性の酸化物MgTi2O5をTiNと複合アニオンコンポジット化することで、熱電特性の大幅な改善に成功した。 電子材料: 長谷川、荻野(A01代表)の協働により、層状ペロブスカイトSr2IrO4薄膜について、フッ化に伴う物性、電子状態変化を調べた。SrO岩塩層へのFの挿入とOの部分的除去がIrの4価の電子状態を維持したまま起こること、Sr2IrO4-xF2x薄膜が半導体的挙動を示すことを明らかとした。
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Research Progress Status |
令和2年度が最終年度であるため、記入しない。
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Strategy for Future Research Activity |
令和2年度が最終年度であるため、記入しない。
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Research Products
(199 results)
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[Journal Article] Novel Method of Search for Transparent Optical Materials with Extremely High Melting Point2021
Author(s)
Yutaro Kurashima, Shunsuke Kurosawa, Rikito Murakami, Akihiro Yamaji, Shiori Ishikawa, Jan Pejchal, Kei Kamada, Masao Yoshino, Satoshi Toyoda, Hiroki Sato, Yuui Yokota, Yuji Ohashi, and Akira Yoshikawa
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Journal Title
Crystal Growth & Design
Volume: 21
Pages: 572-578
DOI
Peer Reviewed / Int'l Joint Research
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[Journal Article] Light Absorption Properties and Electronic Band Structures of Lead-Vanadium Oxyhalide Apatites Pb5(VO4)3X (X = F, Cl, Br, I)2020
Author(s)
Masashi Nakamura, Kenji Oqmhula, Keishu Utimula, Miharu Eguchi, Kengo Oka, Kenta Hongo, Ryo Maezono, Kazuhiko Maeda
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Journal Title
Chem. Asian J.
Volume: 15
Pages: 540-545
DOI
Peer Reviewed
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[Journal Article] Two-Dimensional Perovskite Oxynitride K2LaTa2O6N with an H+/K+ Exchangeability in Aqueous Solution to Form Stable Photocatalyst for Visible-Light H2 Evolution2020
Author(s)
Takayoshi Oshima, Tom Ichibha, Kenji Oqmhula, Keisuke Hibino, Shunsuke Yamashita, Kotaro Fujii, Yugo Miseki, Kenta Hongo, Daling Lu, Ryo Maezono, Kazuhiro Sayama, Masatomo Yashima, Koji Kimoto, Hideki Kato, Masato Kakihana, Hiroshi Kageyama, Kazuhiko Maeda
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Journal Title
Angew. Chem. Int. Ed.
Volume: 59
Pages: 9736-9743
DOI
Peer Reviewed
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[Journal Article] Activation of a Pt-loaded Pb2Ti2O5.4F1.2 photocatalyst by alkaline chloride treatment for improved H2 evolution under visible light2020
Author(s)
Haruki Wakayama, Kosaku Kato, Kodai Kashihara, Tomoki Uchiyama, Akinobu Miyoshi, Hiroko Nakata, Daling Lu, Kengo Oka, Akira Yamakata, Yoshiharu Uchimoto, Kazuhiko Maeda
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Journal Title
J. Mater. Chem. A
Volume: 8
Pages: 9099-9108
DOI
Peer Reviewed
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[Journal Article] Synthesis of Three-layer Perovskite Oxynitride K2Ca2Ta3O9N-2H2O and Photocatalytic Activity for H2 Evolution under Visible Light2020
Author(s)
Ya Tang, Kosaku Kato, Takayoshi Oshima, Hiroto Mogi, Akinobu Miyoshi, Kotaro Fujii, Kei-ichi Yanagisawa, Koji Kimoto, Akira Yamakata, Masatomo Yashima, Kazuhiko Maeda
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Journal Title
Inorg. Chem.
Volume: 59
Pages: 11122-11128
DOI
Peer Reviewed
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[Journal Article] An Artificial Z-Scheme Constructed from Dye-Sensitized Metal Oxide Nanosheets for Visible Light-Driven Overall Water Splitting2020
Author(s)
Takayoshi Oshima, Shunta Nishioka, Yuka Kikuchi, Shota Hirai, Kei-ichi Yanagisawa, Miharu Eguchi, Yugo Miseki, Toshiyuki Yokoi, Tatsuto Yui, Koji Kimoto, Kazuhiro Sayama, Osamu Ishitani, Thomas E. Mallouk, Kazuhiko Maeda
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Journal Title
J. Am. Chem. Soc.
Volume: 142
Pages: 8412-8420
DOI
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Thermoelectric and magnetic properties of spark plasma sintered REB66 (RE = Y, Sm, Ho, Tm, Yb)2020
Author(s)
P. Sauerschnig, J.B. Vaney, Y. Michiue, K. Kouzu, T. Yamasaki, S. Okada, A. Yoshikawa, T. Shishido, and T. Mori
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Journal Title
Journal of the European Ceramic Society
Volume: 40
Pages: 3585-3591
DOI
Peer Reviewed / Open Access
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[Journal Article] Screening of Transition (Y, Zr, Hf, V, Nb, Mo, and Ru) and Rare-earth (La, Pr) Elements as Potential Effective Dopants for Thermoelectric GeTe - an Experimental and Theoretical Appraisal2020
Author(s)
Bhuvanesh Srinivasan, Sylvain Le Tonquesse, Alain Gell-, C-dric Bourg-s, Leo Monier, Isao Ohkubo, Jean-Fran-ois Halet, David Berthebaud, and Takao Mori
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Journal Title
Journal of Materials Chemistry A
Volume: 8
Pages: 19805-19821
DOI
Int'l Joint Research
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[Journal Article] Tailoring the Thermoelectric and Structural Properties of Cu-Sn Based Thiospinel Compounds [CuM1+xSn1-xS4 (M = Ti, V, Cr, Co)]2020
Author(s)
C-dric Bourg-s, Bhuvanesh Srinivasan, Bruno Fontaine, Philipp Sauerschnig, Aliz-e Minard, Jean-Fran-ois Halet, Yuzuru Miyazaki, David Berthebaud, and Takao Mori
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Journal Title
Journal of Materials Chemistry C
Volume: 8
Pages: 16368-16383
DOI
Int'l Joint Research
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[Journal Article] Structural, electrical, magnetic, and optical properties of iron-based ladder compounds BaFe2(S1-xSex)32020
Author(s)
Satoshi Imaizumi, Takuya Aoyama, Ryota Kimura, Koya Sasaki, Yusuke Nambu, Maxim Avdeev, Yasuyuki Hirata, Yuka Ikemoto, Taro Moriwaki, Yoshinori Imai, and Kenya Ohgushi
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Journal Title
Physical review B
Volume: 102
Pages: 35104
DOI
Peer Reviewed / Int'l Joint Research
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[Journal Article] Luminescent ionic liquid formed from a melted rhenium(V) cluster2020
Author(s)
J. Yanagisawa, T. Hiraoka, F. Kobayashi, D. Saito, M. Yoshida, M. Kato, F. Takeiri, G. Kobayashi, M. Ohba, L. F. Lindoy, R. Ohtani, S. Hayami
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Journal Title
Chem. Commun.
Volume: 56
Pages: 7957-7960
DOI
Peer Reviewed / Int'l Joint Research
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[Journal Article] Strain-induced creation and switching of anion vacancy layers in perovskite oxynitrides2020
Author(s)
Yamamoto T., Chikamatsu A., Kitagawa S., Izumo N., Yamashita S., Takatsu H., Ochi M., Maruyama T., Namba M., Sun W., Nakashima T., Takeiri F., Fujii K., Yashima M., Sugisawa Y., Sano M., Hirose Y., Sekiba D., Brown C M., Honda T., Ikeda K., Otomo T., Kuroki K., Ishida K., Mori T., Kimoto K., Hasegawa T., Kageyama H.
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Journal Title
Nature Communications(10.1038/s41467-020-19217-7)
Volume: 11
Pages: -
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Kitaev Spin Liquid Candidate OsxCl3 Comprised of Honeycomb Nano-Domains2020
Author(s)
Kota Kataoka, Daigoro Hirai, Takeshi Yajima, Daisuke Nishio-Hamane, Rieko Ishii, Kwang-Yong Choi, Dirk Wulferding, Peter Lemmens, Shunichiro Kittaka, Toshiro Sakakibara, Hajime Ishikawa, Akira Matsuo, Koichi Kindo, and Zenji Hiroi
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Journal Title
Journal of the Physical Society of Japan
Volume: 89
Pages: 114709-1-9
DOI
Peer Reviewed / Int'l Joint Research
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[Journal Article] Growth and scintillation properties of a new red-emitting scintillator Rb2HfI6 for the fiber-reading radiation monitor2020
Author(s)
Shohei Kodama, Shunsuke Kurosawa, Yuki Morishita, Hiroshi Usami, Tatsuo Torii, Masateru Hayashi, Makoto Sasano, Tetsushi Azuma, Hiroki Tanaka, Vladimir Kochurikhin, Jan Pejchal, Robert Kral, Masao Yoshino, Akihiro Yamaji, Satoshi Toyoda, Hiroki Sato, Yuji Ohashi, Yuui Yokota, Kei Kamada, Martin Nikl, Akira Yoshikawa
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Journal Title
IEEE Transactions on Nuclear Science
Volume: 67
Pages: 1055-1062
DOI
Peer Reviewed / Int'l Joint Research
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[Journal Article] Fiber-reading radiation monitoring system using an optical fiber and red-emitting scintillator for ultra-high dose condition2020
Author(s)
Shohei Kodama, Shunsuke Kurosawa, Maki Ohno, Yuki Morishita, Hiroshi Usai, Masateru Hayashi, Makoto Sasano, Tetsushi Azuma, Hiroki Tanaka, Vladimir Kochurikhin, Akihiro Yamaji, Masao Yoshino, Satoshi Toyoda, Hiroki Sato, Yuji OHASHI, Kei Kamada, Yuui Yokota, Akira Yoshikawa, Tatsuo Torii
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Journal Title
Applied Physics Express}
Volume: 13
Pages: 47002
DOI
Peer Reviewed / Int'l Joint Research
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[Journal Article] Single-crystal growth, structure and luminescence properties of Cs2HfCl3Br32020
Author(s)
Shohei Kodama, Shunsuke Kurosawa, Kotaro Fujii, Taito Murakami, Masatomo Yashima, Jan Pejchal, Robert Kral, Martin Nikl, Akihiro Yamaji, Masao Yoshino, Satoshi Toyoda, Hiroki Sato, Yuji Ohashi, Kei Kamada, Yuui Yokota, Akira Yoshikawa
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Journal Title
Optical Materials
Volume: 106
Pages: 109942
DOI
Peer Reviewed / Int'l Joint Research
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