期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 117, 期 23, 页码 12218-12228出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp403478q
关键词
-
资金
- project RGC CRF [CityU6/CRF/08]
- University of Hong Kong
We investigated the influence of native defects on the adsorption and photocatalytic degradation of anionic and cationic dyes for different ZnO nanoparticles. We found that there was no relationship between the dye adsorption onto ZnO nanoparticles and their photocatalytic activity. Fast photocatalytic degradation could be observed for samples having a low concentration of nonradiative defects (and thus low recombination losses of photogenerated carriers), regardless of the amount of dye adsorbed onto the surface. While the absorption of cationic dyes was not significantly affected by ZnO nanoparticle properties, dye adsorption of several anionic dyes was strongly affected by native defects in ZnO. The defects involved in the dye adsorption are likely shallow donor centers exhibiting an electron spin resonance peak at g approximate to 1.957, resulting in positively charged sites at the surface.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据