Preparation and photocatalytic properties of TiO2-ZnO composite hollow microspheres

被引：0
|
作者：
Yu Y. [1 ,2 ]
Yao B. [1 ,2 ]
Yang F. [1 ]
Ma W. [1 ]
机构：
[1] Faculty of Science, Xi'an University of Technology, Xi'an
[2] Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources, Shangluo University, Shangluo
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2019年 / 36卷 / 01期
关键词：
Hollow microspheres; Methylene blue; Photocatalysis; TiO[!sub]2[!/sub; ZnO;
D O I：
10.13801/j.cnki.fhclxb.20180420.001
中图分类号：
学科分类号：
摘要：
The photocatalysts of TiO2-ZnO composite hollow microspheres were obtained by using Ti(SO4)2 and Zn(NO3)2 as raw materials through hydrothermal method. The structures and properties of as-prepared TiO2-ZnO samples were characterized by FTIR, XRD, SEM, UV-Vis diffuse reflection spectrum (UV-Vis DRS), XPS and N2 adsorption-desorption analysis. Methylene blue (MB), as a photocatalytic degradation target, was used to evaluate the photocatalytic performance of the prepared photocatalysts. The results show that the prepared TiO2-ZnO photocatalyst has a hollow microsphere structure with a particle size of 1-2 μm and a specific surface area of 30.46 m2/g. The light absorption ability of ZnO is improved by the addition of TiO2 and reduces the electron hole recombination rate effectively. Under high pressure Hg lamp irradiation, the photocatalytic activity of TiO2-ZnO composite hollow microspheres is higher than that of pure ZnO, and the TiO2-ZnO sample with Zn(NO3)2:Ti(SO4)2 molar ratio of 1:0.7 has the best photocatalytic activity among all the samples. The degradation rate of MB can reach 95.8% in 60 min, and the photocatalytic degradation rate of TiO2-ZnO composite hollow microspheres is 4.3 times that of ZnO. © 2019, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.
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页码：200 / 206
页数：6
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