Chinese Journal of Catalysis ›› 2017, Vol. 38 ›› Issue (10): 1726-1735.DOI: 10.1016/S1872-2067(17)62902-4

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Synthesis of Ag/AgCl/Fe-S plasmonic catalyst for bisphenol A degradation in heterogeneous photo-Fenton system under visible light irradiation

Yun Liu, Yanyan Mao, Xiaoxiao Tang, Yin Xu, Chengcheng Li, Feng Li   

  1. Department of Environmental Science and Engineering, College of Environment and Resources, Xiangtan University, Xiangtan 411105, Hunan, China
  • Received:2017-05-18 Revised:2017-08-05 Online:2017-10-18 Published:2017-10-28
  • Contact: 10.1016/S1872-2067(17)62902-4
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (41573118), Research Foundation of Education Bureau of Hunan Province, China (14B177), and Special Project of Xiangtan University.

Abstract:

A novel plasmonic photo-Fenton catalyst of Ag/AgCl/Fe-S was synthesized by ion exchange and photoreduction methods. The obtained catalyst was characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscope imaging, and Brunauer-Emmett-Teller measurements. Moreover, the photocatalytic activity of Ag/AgCl/Fe-S was investigated for its degradation activity towards bisphenol A (BPA) as target pollutant under visible light irradiation. The effects of H2O2 concentration, pH value, illumination intensity, and catalyst dosage on BPA degradation were examined. Our results indicated that the Ag/AgCl material was successfully loaded onto Fe-sepiolite and showed a high photocatalytic activity under illumination by visible light. Furthermore, active species capture experiments were performed to explore the photocatalytic mechanism of the Ag/AgCl/Fe-S in this heterogeneous photo-Fenton process, where the major active species included hydroxyl radicals (·OH) and holes (h+).

Key words: Visible light, Photo-Fenton, Plasmonic catalyst, Ag/AgCl/Fe-S, Sepiolite