Journal of Inorganic Materials ›› 2016, Vol. 31 ›› Issue (7): 731-738.DOI: 10.15541/jim20150567

• Orginal Article • Previous Articles     Next Articles

Photocatalytic Reduction of CO2 over Sulfied-Loaded ZnO/ZnAl2O4 Composite Hollow Sphere

ZHANG Li1, ZHANG Xiu-Xiu1, 2, DAI Chao-Hua1, OUYANG Jie1, YAN Jian-Hui1, 2   

  1. (1. School of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China; 2. College of Chemical Engineering, Xiang Tan University, Xiangtan 411105, China)
  • Received:2015-11-17 Revised:2016-01-04 Published:2016-07-20 Online:2016-06-22
  • About author:ZHANG Li. E-mail: hgx.zl@163.com
  • Supported by:
    National Natural Science Young Foundation of China(21306041);National Natural Science Foundation of China(21271071);Scientific Research Foundation of Hunan Provincial Education Department of China (15A076)

Abstract:

ZnO/ZnAl2O4 nanocomposites were successfully synthetized by a facile one-pot hydrothermal process. CuS, CdS and Bi2S3 were loaded on the ZnO/ZnAl2O4 by an impregnation process to investigate their photocatalytic activities under simulated sunlight irradiation. The as-prepared samples were characterized by XRD, SEM, TEM, BET and FL techniques. Meanwhile, photocatalytic reduction of CO2 from water over the samples was explored using NaOH and Na2SO3 as sacrificial reagents. The effects of the type and the amount of sulfides on photocatalytic reduction efficiency were investigated. The results indicated that Bi2S3-loading lowered down the photocatalytic activity of ZnO/ZnAl2O4, while CuS or CdS loading enhanced the photocatalytic activity. After ZnO/ZnAl2O4 loaded with 1wt% CuS, the maximum yield of 8.21 mmol/gcat methanol within 6 h was obtained, which increased by up to 3.2 times as compared to ZnO/ZnAl2O4 under the same conditions. The photocatalytic mechanism of the as-prepared CuS/ZnO/ZnAl2O4 were preliminarily discussed.

Key words: ZnO/ZnAl2O4, sulfide, photocatalytic reduction of CO2

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