高等学校化学学报Issue(3)：455-460,6.DOI:10.7503/cjcu20130983
ZnO/ZnSe复合纳米结构的制备及可见光光催化性能
Preparation of ZnO/ZnSe Nanostructures and Their Photocatalytic Properties Under Visible Light Irradiation
摘要
Abstract
Homogeneous ZnO/ZnSe nanostructure photocatalytic materials with diameters of 500 nm were successfully prepared by a pyrohydrolytic method in which ZnO nanospheres with diameters of 600 nm were used as sacrificial templates. In order to compare the effect of different O/Se ratios on photocatalytic proper-ties, ZnO/ZnSe nanostructures with different degrees of selenylation were obtained by keeping other reaction parameters unchanged and adjusting the amount of hydrazine hydrate. The structures and morphologies of pure ZnO and ZnO/ZnSe nanostructures were investigated by field emission scanning electron microscopy ( SEM ) and X-ray diffraction( XRD) . And their photocatalytic activities were investigated by degradation of methylene blue( MB) solution. The results indicate that ZnO/ZnSe nanostructures show wider absorption bands in the visible region as well as in the UV region and exhibit superior photocatalytic performance compared with pure ZnO. This is mainly attributed to narrow-band ZnSe, which could effectively absorb visible light and make electrons excited. Photoexcited electrons could be transferred to the conduction band of ZnO under the power of diffusion potential, while the holes remain in the ZnSe valence band, which facilitates charge separation of electron-hole pair, decreases recombination probability, and thus improves the photocatalytic efficiency.关键词
ZnO/ZnO/ZnSe/亚甲基蓝/光催化效率Key words
ZnO/ZnO/ZnSe/Methylene blue( MB)/Photocatalytic efficiency分类
化学化工引用本文复制引用
梁建,何霞,董海亮,刘海瑞,张华,许并社..ZnO/ZnSe复合纳米结构的制备及可见光光催化性能[J].高等学校化学学报,2014,(3):455-460,6.基金项目
国家自然科学基金(批准号:51002102)和山西省自然科学基金(批准号:2012011046-7)资助.@@@@Supported by the National Natural Science Foundation of China(No.51002102) and the Natural Science Foundation of Shanxi Province, China(No.2012011046-7) （批准号:51002102）
