Synthesis of hollow WO3/ZnO compound nanospheres and photocatalystic degradation on methylene blue

被引：0
作者：
Tian L. [1 ,2 ,3 ,4 ]
Wu J.-L. [1 ,2 ,3 ,4 ]
Chen S.-M. [1 ,2 ,3 ,4 ]
Liu Q. [1 ,2 ,3 ,4 ]
Yi Y.-T. [1 ,2 ,3 ,4 ]
机构：
[1] School of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan
[2] Hunan Provincial Key Defense Laboratory of High Temperature Wear-resisting Materials and Preparation Technology, Hunan University of Science and Technology, Xiangtan
[3] Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, Hunan University of Science and Technology, Xiangtan
[4] Hunan Provincial Key Laboratory of Advanced Materials for New Energy Storage and Conversion, Hunan University of Science and Technology, Xiangtan
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2021年 / 31卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Compound-semiconductor; Hollow microsphere; Nanoparticle; Photocatalyst; WO[!sub]3[!/sub]/ZnO;
D O I：
10.11817/j.ysxb.1004.0609.2021-40143
中图分类号：
学科分类号：
摘要：
ZnO/WO3 compound semiconductor photocatalysts were prepared with carbon spheres as templates, zinc acetate and sodium tungstate as reaction source. The phase, morphology, composition and microstructure of the products were characterized by XRD, SEM and EDS technique. The results show that n-WO3/n-ZnO composite has red shift of a strong absorption peak at 664 nm on methylene blue (MB) with the band gap of 3.64 eV. The degradation rate of n-WO3/n-ZnO composite on 10 mg/L methylene blue solution reaches 90% in 40 min and the degradation finishes completely after 60 min. The WO3/ZnO composite photocatalyst shows excellent cycle stability. The degradation process confirms to the one-order kinetic model and ka=5.58×10-2 h-1. The research result on the mechanism of degradation of WO3/ZnO composite shows that the energy level matching between WO3 and ZnO can form n-n heterojunction and benefit to enhance photocatalytic performance of WO3/ZnO composite due to improving electron mobility and photo generated electron-hole pairs separation. © 2021, China Science Publishing & Media Ltd. All right reserved.
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页码：3592 / 3600
页数：8
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