Morphologies of zinc oxide particles and their effects on photocatalysis

被引:452
作者
Li, D [1 ]
Haneda, H [1 ]
机构
[1] NIMS, Adv Mat Lab, Tsukuba, Ibaraki 3050047, Japan
关键词
zinc oxide; morphology; crystallinity; photocatalysis; acetaldehyde;
D O I
10.1016/S0045-6535(02)00787-7
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
ZnO powders with different morphologies were synthesized by alkali precipitation, organo-zinc hydrolysis, and spray pyrolysis. Acetaldehyde decomposition was used as a probe reaction to evaluate the photocatalysis of these ZnO powders. We investigated the relationship between photocatalytic activity and crystallinity, surface area, or morphology. Results indicate that the photocatalytic activity of ZnO powder depends on crystallinity rather than surface area for the same original ZnO powders prepared by equal conditions other than the difference in calcination temperature. However, no direct relationship between photocatalytic activity and crystallinity or surface area was found for the differently original ZnO powders prepared by different methods, or the same method with different conditions. Instead, we find that the particle morphology significantly affects its photocatalysis. (C) 2003 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:129 / 137
页数:9
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