Photodegradation of phenol and benzoic acid by sol-gel-synthesized alkali metal-doped ZnO

被引：43

作者：

Benhebal, Hadj ^{[1
]}

Chaib, Messaoud ^{[1
]}

Leonard, Angelique ^{[2
]}

Lambert, Stephanie D. ^{[2
]}

Crine, Michel ^{[2
]}

机构：

[1] Univ Tiaret, Lab Chim & Environm, Tiaret 14000, Algeria

[2] Univ Liege, Lab Genie Chim, B-4000 Liege, Belgium

来源：

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2012年 / 15卷 / 03期

关键词：

Zinc oxide; Sol-gel process; Alkali metals; Photocatalytic activity; OPTICAL-CONSTANTS; THIN-FILMS; NANOWIRES; NANOPARTICLES; DEGRADATION; PARTICLES; GROWTH;

D O I：

10.1016/j.mssp.2011.12.001

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The effect of three alkali metal dopants on the photocatalytic properties of zinc oxide (ZnO) was investigated. Crystallized powders of ZnO doped with 10% lithium, sodium and potassium synthesized by a sol-gel process with zinc acetate and oxalic acid precursors were characterized by X-ray diffraction, scanning electron microscopy. UV-Vis diffuse reflectance and nitrogen adsorption isotherms. Photocatalytic activity under ultraviolet irradiation of undoped and doped ZnO powders was tested by degradation of phenol and benzoic acid, chosen as model organic pollutants. Doping ZnO with lithium, sodium and potassium increases the crystallinity of powders and reduces band gap energy. Comparison of photocatalytic activity of undoped and doped ZnO powders demonstrates that doping with sodium and lithium increases the efficiency of degradation of both phenol and benzoic acid. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：264 / 269

页数：6

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