Volume 38 Issue 7
Jul.  2021
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DU Chunyan, SONG Jiahao, TAN Shiyang, et al. Preparation of graphene bridged ZnO/Ag3PO4 composite and its degradation performance for ciprofloxacin[J]. Acta Materiae Compositae Sinica, 2021, 38(7): 2254-2264. doi: 10.13801/j.cnki.fhclxb.20200909.001
Citation: DU Chunyan, SONG Jiahao, TAN Shiyang, et al. Preparation of graphene bridged ZnO/Ag3PO4 composite and its degradation performance for ciprofloxacin[J]. Acta Materiae Compositae Sinica, 2021, 38(7): 2254-2264. doi: 10.13801/j.cnki.fhclxb.20200909.001

Preparation of graphene bridged ZnO/Ag3PO4 composite and its degradation performance for ciprofloxacin

doi: 10.13801/j.cnki.fhclxb.20200909.001
  • Received Date: 2020-07-16
  • Accepted Date: 2020-08-27
  • Available Online: 2020-09-10
  • Publish Date: 2021-07-15
  • Graphene-bridged ZnO/Ag3PO4 composite photocatalytic material, with excellent visible light catalytic performance, was prepared with the method of precipitation and deposition. Some characterization methods, includingXRD, XPS, SEM, EDS, BET, FTIR, UV-Vis DRS, PLand ESR were adopted to characterize and analyze the crystal structure, morphology, and optical properties of ZnO/Ag3PO4 composite photocatalytic material. Meanwhile, the photocatalytic degradation performance of GO-ZnO/Ag3PO4 with different ratios of graphene oxideto simulation antibiotics wastewater ciprofloxacin (CIP) was explored. The introduction of GO and ZnO enhances the visible light absorption of GO-ZnO/Ag3PO4, and makes GO-ZnO/Ag3PO4 have better separation efficiency of electron-hole pairs. When the mass fraction of GO is 1wt%, GO-ZnO/Ag3PO4 displays the best photocatalytic activity, and the degradation rate of CIP can reach 85.3% after 60 minutes of visible light. The capture experimentprove that, in the reaction process, superoxide radical (·O2) is the main active substance, and a heterojunction is formed between ZnO and Ag3PO4, which conforms to the Z-scheme electron transfer mechanism. The introduction of GO furtherly improves the rapid transfer of electrons and makes the Z-scheme system more stable. After six photocatalytic cycles, the degradation rate remained above 70%, indicating that the GO-ZnO/Ag3PO4 composite material has excellent stability.

     

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