Development of new photocatalysts and luminescent materials with one-dimensional pillared structures

新型一维柱状结构光催化剂和发光材料的开发

• 批准号: 09640696
• 负责人: KUDO Akihiko
• 金额: $ 2.3万
• 依托单位: Science University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640696/
• 关键词: Photocatalyst; Water splitting; Visible light response; Tantalate; Zinc sulfide; Bismuth vanadate; 硫化亜鉛; バナジン酸ビスマス; 発光; タンタル酸化物; インジウム酸化物; ガリウム酸化物; ビスマス酸化物

K_3Ta_3Si_2O_<13> with a microporous structure showed an activity for water splitting into H_2 and O_2 in stoichiometric amounts. Moreover, alkali and alkali earth tantalates were found to be active photocatalysts for the water splitting. Among them, NaTaO_3 with a NiO co-catalyst was the most active and the quantum yield of the NiO/NaTaO_3 photocatalyst at amounted to ca. 30% at 270 nm. On the other hand, BiVO_4 with 2.3 eV band gap showed an activity for O_2 evolution from an aqueous silver nitrate solution under visible light irradiation. Cu-ZnS with 2.5 eV band gap was also active for H_2 evolution from an aqueous potassium sulfite solution under visible light irradiation. The activities of BiVO_4 and Cu-ZnS photocatalysts were comparable to those of WO_3 and Pt/CdS which were representative photocatalysts working under visible light irradiation. In_2O_3(ZnO)_m with a laminal structure was able to produce H_2 or O_2 from aqueous solutions containing sacrificial reagents under visible light irradiation. Ga_<2-x>In_xO_3 solid solutions have arisen as unique photocatalysts whose band structure was controlled by changing the composition.

具有<13>微孔结构的K_3Ta_3Si_2O_2具有化学计量比的水分解活性。此外，碱金属和碱土金属钽酸盐被发现是水裂解的活性光催化剂。其中以NaTaO_3和NiO为助催化剂的催化活性最高，量子产率约为100%。在270 nm处为30%。另一方面，带隙为2.3 eV的BiVO_4在可见光照射下表现出从硝酸银水溶液中析氧的活性。带隙为2.5eV的Cu-ZnS在可见光照射下也具有从亚硫酸钾水溶液中析氢的活性。BiVO_4和Cu-ZnS光催化剂的活性可与WO_3和Pt/CdS这两种典型的可见光催化剂相媲美。具有层状结构的In_2O_3（ZnO）_m在可见光照射下，能从含牺牲试剂的水溶液中产生H_2或O_2。Ga_<2-x>In_xO_3固溶体是一种独特的光催化剂，其能带结构可以通过改变固溶体的组成来控制。

项目成果

工藤: "層状化合物の基礎と光化学ヘの応用" 色材協会誌. 71[7]. 440-448 (1998)

Kudo：“层状化合物的基础知识及其在光化学中的应用”，着色材料协会杂志 71[7]（1998 年）。

H.Kato and A.Kudo: "New Tantalate Photocatalysts for Water Decomposition into H_2 and O_2" Chem.Phys.Lett.295[5-6]. 487-492 (1998)

H.Kato 和 A.Kudo：“用于水分解为 H_2 和 O_2 的新型钽酸盐光催化剂”Chem.Phys.Lett.295[5-6]。

A.Kudo and E.Kaneko: "Photoluminescent Properties of Ion-Exchangeable Layered Oxides" Microporous Mesoporous Mater.21[4-6]. 615-620 (1998)

A.Kudo 和 E.Kaneko：“离子交换层状氧化物的光致发光特性”微孔介孔材料.21[4-6]。

A.Kudo, and H.Nagayoshi: "Photocatalytic Reduction of N_2O on Metal-supported TiO_2 Powder at Room Temperature in the Presence of H_2O and CH_3OH Vapor" Catal.Lett.52[1/2]. 109-111 (1998)

A.Kudo 和 H.Nagayoshi：“在 H_2O 和 CH_3OH 蒸气存在下，室温下金属负载 TiO_2 粉末上 N_2O 的光催化还原”Catal.Lett.52[1/2]。

工藤: "層状化合物の基礎と光化学への応用" 色材協会誌. 71[7]. 440-448 (1998)

Kudo：“层状化合物的基础知识及其在光化学中的应用”，彩色材料协会杂志 71[7]（1998 年）。