自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 23    No. 12    December 2016

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Preparation and photocatalytic performance of ZnO/ZnGa2O4 composite microspheres
ZHANG Li(张丽)1, DAI Chao-hua(戴超华)1, ZHANG Xiu-xiu(张秀秀)2, LIU You-nian(刘又年)3, YAN Jian-hui(阎建辉)1, 2, 3

1. College of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China;
2. College of Chemical Engineering, Xiangtan University, Xiangtan 411105, China;
3. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China

Abstract:ZnO/ZnGa2O4 composite microspheres with heterojunction were successfully synthesized by one-pot hydrothermal method. These samples were characterized by TG/DTA, XRD, TEM, HRTEM, UV-vis DRS, FL and BET techniques. The results indicated the as-prepared samples showed better degree of crystalline and large specific surface area. The photocatalytic activity was evaluated by degradation of methyl orange with the concentration of 50 mg/L under the irradiation of simulated sunlight. The effects of molar ratio of Zn to Ga and calcination temperature on the photocatalytic activity were investigated in detail. The results showed that the highest photocatalytic degradation efficiency was observed at the molar ratio of Zn to Ga of 1:0.5 in the starting materials and the calcination temperature of 400 °C. The maximum photocatalytic degradation rate of MO was 97.1% within 60 min under the simulated sunlight irradiation, which is greatly higher than that of ZnO and ZnGa2O4.

 

Key words: ZnO/ZnGa2O4; photocatalytic performance; microspheres; simulated sunlight

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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