Photocatalytic degradation of ofloxacin by ZnO/CsxWO3 composite synthesized by two-step method: A kinetic study

Wenwen Ning, Zhihuan Zhao, Honghong Chang, Zhanyong Gu, Bing Zhang, Shu Yin, Jimin Fan

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1 Citation (Scopus)

Abstract

The composite of ZnO/CsxWO3 with heterojunction was prepared by a two-step solvothermal method and the degradation of ofloxacin solution under full-spectrum light irradiation was carried out to evaluate the performance. The composites were characterized by XRD, SEM, EDS and UV-Vis-NIR reflectance. The result shows that the prepared composite has an ideal optical absorption in the spectral region of 200-2500nm and higher photocatalytic performance compared with ZnO and CsxWO3. Moreover, h+, ·OH and ·O2- radicals are determined to be the active species. It is suggested that the heterojunction between ZnO and CsxWO3 for ZnO/CsxWO3 composite is important for improving the charge separation and thus restraining the recombination of photogenerated electrons and holes. Photodegradation of ofloxacin catalyzed by ZnO/CsxWO3 followed the first-order kinetics and the degradation rate of ZnO/2CsxWO3 was about two times higher than those of CsxWO3 and ZnO.

Original languageEnglish
Article number1950068
JournalFunctional Materials Letters
Volume12
Issue number5
DOIs
Publication statusPublished - 2019 Oct 1

Keywords

  • ZnO/CsxWO
  • active species
  • full-spectrum
  • two-step approach

ASJC Scopus subject areas

  • Materials Science(all)

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