COMPARISON OF TIO2 POWDER SUSPENSIONS AND TIO2 CERAMIC MEMBRANES SUPPORTED ON GLASS AS PHOTOCATALYTIC SYSTEMS IN THE REDUCTION OF CHROMIUM(VI)

被引：82

作者：

SABATE, J

ANDERSON, MA

AGUADO, MA

GIMENEZ, J

CERVERAMARCH, S

HILL, CG

机构：

[1] UNIV WISCONSIN,WATER CHEM PROGRAM,MADISON,WI 53706

[2] UNIV BARCELONA,DEPT CHEM ENGN,E-08028 BARCELONA,SPAIN

[3] UNIV WISCONSIN,DEPT CHEM ENGN,MADISON,WI 53706

来源：

JOURNAL OF MOLECULAR CATALYSIS | 1992年 / 71卷 / 01期

关键词：

D O I：

10.1016/0304-5102(92)80007-4

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：

A comparative study of semiconductor particle suspensions and semiconductor membranes as photocatalytic systems is presented. Both suspensions of TiO2 powder and TiO2 ceramic membranes supported on glass act as photocatalysts for the reduction of chromium(VI) to chromium(III). In both cases, the overall kinetic characteristics were the same. The reaction rate increases as pH decreases, and the order of reaction with respect to Cr(VI) is 0.5 at low pH (< 2). For this pH no deactivation of the catalyst is noted. The efficiency of the suspended particles was ca. four times higher than that of the membrane system.

引用

页码：57 / 68

页数：12

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