1998 Fiscal Year Annual Research Report

環境浄化のための酸化チタン光触媒反応の基礎的研究

Research Project

Project/Area Number	09555268
Research Institution	The University of Tokyo
Principal Investigator	藤嶋昭東京大学, 大学院・工学系研究科, 教授 (30078307)
Co-Investigator(Kenkyū-buntansha)	橋本和仁東京大学, 先端科学技術研究センター, 教授 (00172859)
Keywords	環境浄化 / 酸化チタン / 光触媒 / 紫外線 / 空気の清浄化 / 酸化チタン内添紙
Research Abstract	我々は、環境保全の問題の一つである水および空気の清浄化に注目し、比較的少量の有害物質をターゲットとした場合、光触媒の適用は実用観点から非常に有用であることを見いだした。吸着剤との組み合わせなどで多量の物質も対象としてできるような発展も考えられた。その技術を確立することを最終目的として研究を遂行してきた。光触媒反応で通常の生活空間内に存在する微弱な紫外線のみを消費して、空気の清浄化や雑菌の除去,さらに空気中窒素酸化物の固定化などの環境化機能を発現する全く新しいタイプの建築材料を開発することが可能になりつつある。この光インテリジェント建材と呼ぶ材料は、地球規模の環境問題から身近な院内感染問題を解決するものとして、社会へ与える影響は非常に大きいと予想され、これらのことを踏まえた上で、研究を遂行してきた。本年度は、反応機構の解明や高活性酸化チタン材料の作製と長期安定性と、多くの課題が残されていたが、精密な表面観察の大型装置を導入したことにより、より精密な表面と反応物との相関をみてきた。藤嶋らは酸化チタン内添紙や活性炭とのハイブリッドなど昨年度に引き続き新たな材料の作製に取り組んできた。また、拡散プロセスのない油の分解や抗菌試験の立ち上げも行い、本材料の大きな特徴の一つである殺菌についても成果を上げることが出来た。研究成果を下記に述べる。 1. 光触媒の長期安定性 (1) 光触媒の表面への吸着種が光触媒反応に与える影響の解明とその処理 2. 各用途における光触媒の適用とその反応機構の確立 (1) 殺菌に関する反応機構の確立 (2) 様々な悪臭・有害物質に対する光触媒の適用

Research Products
(18 results)

All Other

All Publications (18 results)

[Publications] Y.Komoda: "Influence of the Rotation Rate of a Rotary Viscometer on the Photoelectrorheological Properties of TiO_2 Particle Suspensions" J.Electrochem.459. 155-165 (1998)
[Publications] K.Kobayakawa: "Continuous-Flow Photoreactor Packed with Titanium Dioxide Immobilized on Large Silica Gel Beads to Decompose Oxalic Acid in Excess Water" J.Photochem.Photopicel.A:Chem.118. 65-69 (1998)
[Publications] Y.Einaga: "Mossbauer Study on Characterization of Co[Fe(CN)_5NH_3]・xH_2O" Hyperfine Interaction. 116. 159-166 (1998)
[Publications] K.Hirota: "Photoelectrochemical Reduction of CO_2 in a High-Pressure CO_2+Methanol Medium at p-Type Semiconductor Electrodes" J.Phys.Chem.B. 102(49). 9834-9843 (1998)
[Publications] R.D.Sun: "Formation of Catalytic Pd on ZnO Thin Films for Electroless Metal Deposition" J.Electrochem.Soc.145(10). 3378-3382 (1998)
[Publications] S.I.Matsushita: "New Mesostructured Porous TiO_2 Surface Prepared Using a Two-Dimensional Array-Bassed Template of Silica Particles" Langmuir. 14(22). 6441-6447 (1998)
[Publications] A.Fujishima: "Titanium Oxide-Coated Glass: Self-Cleaning and Anti-Fogging Propertied and Applictions Effect of Ultrasonic Treatment on Highly Hydrophilic TiO_2 Surfaces" Inter.Glass Review-Flat Glass Processing. 114-116 (1998)
[Publications] B.Ohtani: "Surface Functionalization of Doped CVD Diamond Via Covalent Bond. An XPS Study on the Formation of Surface-Bound Quanternary Pyridinium Solt." Chem.Lett.953-954 (1998)
[Publications] X.M.Yang: "Surface-Enhanced Raman Imaging(SERI)as a Technique for Imaging Molecular Monolayers with Chemical Selectivity Under Ambient Conditions" J.Raman,Spectroscopy. 29. 725-732 (1998)
[Publications] L.Jiang: "Photoinduced Dislocation Lines on the(111)Face of C60 Single Crystals" J.Phys.Chem.B. 102(33). 6351-6359 (1998)
[Publications] K.Sunada: "Bactericidal and Detoxification Effects of TiO_2 Thin Film Photocatalysts" Enviromental Sci.& Technology. 32(5). 726-728 (1998)
[Publications] N.Sakai: "Effect of Adsorbed Water on the Photoelectrorheology of TiO_2 Particle Suspensions" J.Electroanal.Chem.445. 1-6 (1998)
[Publications] L.Jiang: "Soliton Superlattices on the(0001)Surface of C70 Single Crystals" Sar.Sci.408. 112-122 (1998)
[Publications] Y.Kim: "AFM Study of Surface Phenomena Based on C_<60> Film Growth" Appl.Sur.Sci.130-132. 602-609 (1998)
[Publications] T.Yamamoto: "Electrochemical Reduction of CO_2 in Micropores" Chem.Lett.825-826 (1998)
[Publications] Y.Amono: "Photo-thermally Induced Phase Transition in Vanadyl Phthalocyanine Thin Film" Chem.Lett.639-640 (1998)
[Publications] Y.Einaga: "External Magnetic Field Effect on the Photoinduced Magnetization in a Cobalt Iron Cyanide" Chem.Lett.585-586 (1998)
[Publications] X.M.Yang: "Examination of the Photoreaction of p-Nitrobenzoic Acid on Electrochemically Roughened Silver Using Surface-Enhanced Raman Imaging(SERI)" J.Phys.Chem.B. 102. 4933-4934 (1998)

1998 Fiscal Year Annual Research Report

環境浄化のための酸化チタン光触媒反応の基礎的研究

Principal Investigator

藤嶋 昭 東京大学, 大学院・工学系研究科, 教授 (30078307)

Research Products

[Publications] Y.Komoda: "Influence of the Rotation Rate of a Rotary Viscometer on the Photoelectrorheological Properties of TiO_2 Particle Suspensions" J.Electrochem.459. 155-165 (1998)

[Publications] K.Kobayakawa: "Continuous-Flow Photoreactor Packed with Titanium Dioxide Immobilized on Large Silica Gel Beads to Decompose Oxalic Acid in Excess Water" J.Photochem.Photopicel.A:Chem.118. 65-69 (1998)

[Publications] Y.Einaga: "Mossbauer Study on Characterization of Co[Fe(CN)_5NH_3]・xH_2O" Hyperfine Interaction. 116. 159-166 (1998)

[Publications] K.Hirota: "Photoelectrochemical Reduction of CO_2 in a High-Pressure CO_2+Methanol Medium at p-Type Semiconductor Electrodes" J.Phys.Chem.B. 102(49). 9834-9843 (1998)

[Publications] R.D.Sun: "Formation of Catalytic Pd on ZnO Thin Films for Electroless Metal Deposition" J.Electrochem.Soc.145(10). 3378-3382 (1998)

[Publications] S.I.Matsushita: "New Mesostructured Porous TiO_2 Surface Prepared Using a Two-Dimensional Array-Bassed Template of Silica Particles" Langmuir. 14(22). 6441-6447 (1998)

[Publications] A.Fujishima: "Titanium Oxide-Coated Glass: Self-Cleaning and Anti-Fogging Propertied and Applictions Effect of Ultrasonic Treatment on Highly Hydrophilic TiO_2 Surfaces" Inter.Glass Review-Flat Glass Processing. 114-116 (1998)

[Publications] B.Ohtani: "Surface Functionalization of Doped CVD Diamond Via Covalent Bond. An XPS Study on the Formation of Surface-Bound Quanternary Pyridinium Solt." Chem.Lett.953-954 (1998)

[Publications] X.M.Yang: "Surface-Enhanced Raman Imaging(SERI)as a Technique for Imaging Molecular Monolayers with Chemical Selectivity Under Ambient Conditions" J.Raman,Spectroscopy. 29. 725-732 (1998)

[Publications] L.Jiang: "Photoinduced Dislocation Lines on the(111)Face of C60 Single Crystals" J.Phys.Chem.B. 102(33). 6351-6359 (1998)

[Publications] K.Sunada: "Bactericidal and Detoxification Effects of TiO_2 Thin Film Photocatalysts" Enviromental Sci.& Technology. 32(5). 726-728 (1998)

[Publications] N.Sakai: "Effect of Adsorbed Water on the Photoelectrorheology of TiO_2 Particle Suspensions" J.Electroanal.Chem.445. 1-6 (1998)

[Publications] L.Jiang: "Soliton Superlattices on the(0001)Surface of C70 Single Crystals" Sar.Sci.408. 112-122 (1998)

[Publications] Y.Kim: "AFM Study of Surface Phenomena Based on C_<60> Film Growth" Appl.Sur.Sci.130-132. 602-609 (1998)

[Publications] T.Yamamoto: "Electrochemical Reduction of CO_2 in Micropores" Chem.Lett.825-826 (1998)

[Publications] Y.Amono: "Photo-thermally Induced Phase Transition in Vanadyl Phthalocyanine Thin Film" Chem.Lett.639-640 (1998)

[Publications] Y.Einaga: "External Magnetic Field Effect on the Photoinduced Magnetization in a Cobalt Iron Cyanide" Chem.Lett.585-586 (1998)

[Publications] X.M.Yang: "Examination of the Photoreaction of p-Nitrobenzoic Acid on Electrochemically Roughened Silver Using Surface-Enhanced Raman Imaging(SERI)" J.Phys.Chem.B. 102. 4933-4934 (1998)

藤嶋昭東京大学, 大学院・工学系研究科, 教授 (30078307)