Visible-light absorptivity of a zincoxysulfide (ZnOxS1-x) composite semiconductor and its photocatalytic activities for degradation of organic pollutants under visible-light irradiation

被引：74

作者：

Kim, Cham ^{[1
]}

Doh, Seok Joo ^{[1
]}

Lee, Se Geun ^{[1
]}

Lee, Sung Jun ^{[1
]}

Kim, Ho Young ^{[1
]}

机构：

[1] Daegu Gyeongbuk Inst Sci & Technol, Adv Nano Mat Res Team, Taegu 704, South Korea

来源：

APPLIED CATALYSIS A-GENERAL | 2007年 / 330卷

关键词：

photocatalyst; visible light; ZnS; ZnO; zincoxysulfide (ZnOxS1-x);

D O I：

10.1016/j.apcata.2007.07.016

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：

This work reports the development of a visible-light sensible photocatalyst and the photocatalytic degradation of organic pollutants under visible-light irradiation. A composite semiconductor of ZnS and ZnO was prepared through co-precipitation process of Zn(NO3)(2) in the mixed solution of aqueous Na2S and NaOH followed by calcination at 400 degrees C in N-2 atmosphere. It was revealed that the composite semiconductor was a solid solution of ZnS and ZnO, a zincoxysulfide (ZnOxS1-x) having advanced visible-light absorptivity. It was assured that the visible-light absorptivity was caused by modification of band structure while the solid solution had been prepared, thus we suggested a reasonable band structure model involved in a zincoxysulfide. To observe its photocatalytic activity under visible-light illumination, photodegradation test was done and we confirmed that zincoxysulfide showed predominant photocatalytic activity due to its superior visible-light absorptivity to pure ZnS and ZnO. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：127 / 133

页数：7

共 45 条

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