ENVIRONMENTAL PHOTOCHEMISTRY - ELECTRON-TRANSFER FROM EXCITED HUMIC-ACID TO TIO2 COLLOIDS AND SEMICONDUCTOR MEDIATED REDUCTION OF OXAZINE DYES BY HUMIC-ACID

被引：14

作者：

VINODGOPAL, K

机构：

[1] Department of Chemistry, Indiana University Northwest, Gary, Indiana

来源：

RESEARCH ON CHEMICAL INTERMEDIATES | 1994年 / 20卷 / 08期

关键词：

D O I：

10.1163/156856794X00577

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The ability of naturally occurring Suwanee River Humic acid to sensitize a large bandgap semiconductor such as colloidal TiO2 has been investigated by fluorescence emission. The charge injected from the humic acid sensitizer into the semiconductor was used to reduce a series of oxazine dyes viz:, N,N,N',N'-tetraethyloxonine and Nile Blue A. The mechanism of such a sensitized reduction process was elucidated by laser flash photolysis methods. The quantum yield for such a reduction calculated from these transient absorption techniques was 0.005.

引用

页码：825 / 833

页数：9

共 24 条

[1]

CHOUDHRY G G, 1981, Toxicological and Environmental Chemistry, V4, P261, DOI 10.1080/02772248109356964

[2] PHOTOENOLIZATION OF ORTHO-ALKYL-SUBSTITUTED CARBONYL-COMPOUNDS - USE OF ELECTRON-TRANSFER PROCESSES TO CHARACTERIZE TRANSIENT INTERMEDIATES [J].