Photocatalytic reduction of hexavalent chromium in aqueous solution over titania pillared zirconium phosphate and titanium phosphate under solar radiation

被引：85

作者：

Das, DP

Parida, K ^{[1
]}

De, BR

机构：

[1] CSIR, BP & EM Dept, Reg Res Lab, Bhubaneswar 751013, Orissa, India

[2] Vidyasagar Univ, Dept Chem & Chem Technol, Midnapore, W Bengal, India

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2006年 / 245卷 / 1-2期

关键词：

photo-reduction; titania pillared; surface area; solar-radiation; kinetics;

D O I：

10.1016/j.molcata.2005.10.001

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：

The photo-reduction of hexavalent chromium was carried out varying different parameters such as pH, titania loading on zirconium phosphate (ZrP) and titanium phosphate (TiP), initial substrate concentration, irradiation time and catalyst dose. The reduction rate of chromium was favorable under acidic pH than in the alkaline pH. The dissolved oxygen imparts the minimum effect on the reduction of Cr(VI) as oxygen competes with the hexavalent chromium for the electron in the acidic solutions. Hexavalent chromium was completely reduced over titania pillared ZrP and TiP under solar radiation. This process of photo-reduction follows approximately pseudo first-order kinetics. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：217 / 224

页数：8

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