LIGHT-INTENSITY DEPENDENCE IN PHOTOCATALYTIC DECOMPOSITION OF WATER OVER K4NB6O17 CATALYST

被引：31

作者：

TABATA, S ^{[1
]}

OHNISHI, H ^{[1
]}

YAGASAKI, E ^{[1
]}

IPPOMMATSU, M ^{[1
]}

DOMEN, K ^{[1
]}

机构：

[1] TOKYO INST TECHNOL,RESOURCES UTILIZAT RES LAB,MIDORI KU,YOKOHAMA,KANAGAWA 227,JAPAN

来源：

CATALYSIS LETTERS | 1994年 / 28卷 / 2-4期

关键词：

PHOTOCATALYSIS; WATER DECOMPOSITION; LIGHT-INTENSITY DEPENDENCE; K4NB6O17;

D O I：

10.1007/BF00806072

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have measured, for the first time, the light-intensity dependence in photocatalytic decomposition of water over K4Nb6O17. In higher light-intensity region, the rate of reaction is proportional to the square root of the light intensity. In lower light-intensity region, on the contrary, the rate is almost linearly proportional to the light intensity. We propose a reaction model whose main path of the reaction loss is the recombination of the charges generated under band-gap radiation. This model describes the light-intensity dependence of this reaction well.

引用

页码：417 / 422

页数：6

共 14 条

[1] PHOTODECOMPOSITION OF WATER AND HYDROGEN EVOLUTION FROM AQUEOUS METHANOL SOLUTION OVER NOVEL NIOBATE PHOTOCATALYSTS [J].

DOMEN, K ;

KUDO, A ;

SHINOZAKI, A ;

TANAKA, A ;

MARUYA, K ;

ONISHI, T .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1986, (04) :356-357

[2] HYDRATION MECHANISM OF LAMELLAR ALKALINE NIOBATES WITH THE FORMULA A4NB4O17(A=K, RB, CS) [J].

GASPERIN, M ;

LEBIHAN, MT .

JOURNAL OF SOLID STATE CHEMISTRY, 1982, 43 (03) :346-353

[3] A MECHANISM OF ELECTRON-HOLE PAIR SEPARATION IN ILLUMINATED SEMICONDUCTOR PARTICLES [J].

GERISCHER, H .

JOURNAL OF PHYSICAL CHEMISTRY, 1984, 88 (25) :6096-6097

[4] STABLE PHOTOCATALYTIC ACTIVITY OF BATI4O9 COMBINED WITH RUTHENIUM OXIDE FOR DECOMPOSITION OF WATER [J].

INOUE, Y ;

NIIYAMA, T ;

ASAI, Y ;

SATO, K .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1992, (07) :579-580

[5] PHOTOCATALYTIC ACTIVITY OF ALKALI-METAL TITANATES COMBINED WITH RU IN THE DECOMPOSITION OF WATER [J].

INOUE, Y ;

KUBOKAWA, T ;

SATO, K .

JOURNAL OF PHYSICAL CHEMISTRY, 1991, 95 (10) :4059-4063

[6] NICKEL-LOADED K4NB6O17 PHOTOCATALYST IN THE DECOMPOSITION OF H2O INTO H-2 AND O-2 - STRUCTURE AND REACTION-MECHANISM [J].

KUDO, A ;

SAYAMA, K ;

TANAKA, A ;

ASAKURA, K ;

DOMEN, K ;

MARUYA, K ;

ONISHI, T .

JOURNAL OF CATALYSIS, 1989, 120 (02) :337-352

[7]

LEHN JM, 1982, ISRAEL J CHEM, V22, P168

[8]

SATO S, 1988, NEW J CHEM, V12, P859

[9] PHOTOCATALYTIC WATER DECOMPOSITION AND WATER-GAS SHIFT REACTIONS OVER NAOH-COATED, PLATINIZED TIO2 [J].

SATO, S ;

WHITE, JM .

JOURNAL OF CATALYSIS, 1981, 69 (01) :128-139

[10] PHOTOCATALYTIC DECOMPOSITION OF WATER OVER A NI-LOADED RB4NB6O17 CATALYST [J].

SAYAMA, K ;

TANAKA, A ;

DOMEN, K ;

MARUYA, K ;

ONISHI, T .

JOURNAL OF CATALYSIS, 1990, 124 (02) :541-547

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