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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