Enhancement of photocatalytic activity of synthesized ZnO nanoparticles with oxygen plasma treatment

被引：15

作者：

Nam, Sang-Hun ^{[1
]}

Boo, Jin-Hyo ^{[1
,2
]}

机构：

[1] Sungkyunkwan Univ, Inst Basic Sci, 300 Cheoncheon Dong, Suwon 440746, South Korea

[2] Sungkyunkwan Univ, Dept Chem, 300 Cheoncheon Dong, Suwon 440746, South Korea

来源：

CATALYSIS TODAY | 2016年 / 265卷

基金：

新加坡国家研究基金会;

关键词：

Oxygen plasma; OH radical; Photocatalyst; X-ray photoelectron spectroscopy; SEMICONDUCTOR PHOTOCATALYSIS; THIN-FILMS; TIO2; MECHANISMS; TIO2/SIO2; SURFACES; WATER;

D O I：

10.1016/j.cattod.2015.11.003

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

ZnO nanoparticles were synthesized by the spray-pyrolysis method. There were exposed to oxygen plasma treatment to increase OH radicals on their surfaces. ZnO nanoparticles were spherical grains with a narrow size range of about 7-10 nm, and these small particles agglomerated together to form larger clusters. Synthesized ZnO nanoparticles and a p-25 mixed MB solution exposed to UV illustrate that p-25 has a better photo-degradation response than synthesized ZnO nanoparticles using UV light. Therefore, we did oxygen plasma treatment to increase OH radicals on the surface of synthesized ZnO nanoparticles. As a result, the photocatalytic activity of oxygen plasma treated ZnO nanoparticles was enhanced by about 60% based on the absorption peak of the decomposed MB solution. Also, we have analyzed the surface of oxygen plasma treated ZnO nanoparticles by XPS. Results showed that OH radicals and molecular water on the ZnO surface are enhanced by oxygen plasma treatment. Also, treatment reduced oxygen and zinc vacancies on the treated ZnO surface. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：84 / 89

页数：6

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