EFFECT OF ISOPROPYL-ALCOHOL ON THE SURFACE LOCALIZATION AND RECOMBINATION OF CONDUCTION-BAND ELECTRONS IN DEGUSSA P25 TIO2 - A PULSE-RADIOLYSIS TIME-RESOLVED MICROWAVE CONDUCTIVITY STUDY

被引：64

作者：

WARMAN, JM

DEHAAS, MP

PICHAT, P

SERPONE, N

机构：

[1] ECOLE CENT LYON,CNRS,URA PHOTOCATALYSE CATALYSE & ENVIRONM,F-69131 ECULLY,FRANCE

[2] CONCORDIA UNIV,DEPT CHEM,MONTREAL H3G 1M8,QUEBEC,CANADA

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1991年 / 95卷 / 22期

关键词：

D O I：

10.1021/j100175a081

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：

Conduction-band electrons, formed by pulse radiolysis of Degussa P25 TiO2 particles, have been monitored by time-resolved microwave conductivity and found to undergo equilibrium localization and eventual recombination at the particle surface. In the presence of isopropyl alcohol recombination is retarded due to surface hole scavenging. The particle bulk can then be pumped with mobile electrons, which survive for seconds.

引用

页码：8858 / 8861

页数：4

共 26 条

[1] DETECTION OF THE INTERMEDIATES OF COLLOIDAL TIO2-CATALYZED PHOTOREACTIONS [J].

BAHNEMANN, D ;

HENGLEIN, A ;

SPANHEL, L .

FARADAY DISCUSSIONS, 1984, 78 :151-163

[2]

BICKLEY RI, 1990, 8TH P INT C PHOT CON, P197

[3] PHOTOSENSITIZED CHARGE INJECTION INTO TIO2 PARTICLES AS STUDIED BY MICROWAVE-ABSORPTION [J].

FESSENDEN, RW ;

KAMAT, PV .

CHEMICAL PHYSICS LETTERS, 1986, 123 (03) :233-238

[4]

FOX MA, 1987, TOP CURR CHEM, V142, P71

[5]

GRATZEL M, 1988, PHOTOINDUCED ELECT D, P394

[6] COLLOIDAL TIO2 CATALYZED PHOTO AND RADIATION CHEMICAL PROCESSES IN AQUEOUS-SOLUTION [J].

HENGLEIN, A .

BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1982, 86 (03) :241-246

[7]

HENGLEIN A, 1988, TOP CURR CHEM, V143, P113

[8] HETEROGENEOUS PHOTOCATALYTIC DECOMPOSITION OF SATURATED CARBOXYLIC-ACIDS ON TIO2 POWDER - DECARBOXYLATIVE ROUTE TO ALKANES [J].

KRAEUTLER, B ;

BARD, AJ .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1978, 100 (19) :5985-5992

[9]

MATTHEWS RW, IN PRESS PHOTOCHEMIC

[10] 2 STEP OXIDATION REACTIONS OF ALCOHOLS ON AN ILLUMINATED RUTILE ELECTRODE [J].

MIYAKE, M ;

YONEYAMA, H ;

TAMURA, H .

CHEMISTRY LETTERS, 1976, (06) :635-640

← 1 2 3 →