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Flower-like structured Fe3O4−MQDs/Bi2WO6/GNs heterojunction with high-efficiently charge transfer for organic contaminants degradation

F. Wang,Jian Zhang,D. Jia,Yanqing Ma,Lei Ma,Gongxuan Lu

Published 2019 in Journal of the Taiwan Institute of Chemical Engineers / Elsevier

ABSTRACT

Abstract A novel flower-like ternary Fe3O4-magnetic quantum dots / Bi2WO6/ Graphene nanosheet (Fe3O4−MQDs/Bi2WO6/GNs) composite was successfully prepared by a facile one-pot hydrothermal method. The prepared samples were characterized by XRD, FTIR, UV–vis, SEM, HRTEM, EDS, BET and VSM technologies. Compared with the Bi2WO6 and Fe3O4/Bi2WO6, the Fe3O4/Bi2WO6/GNs catalyst exhibited higher photodegradation ratio of 98.2% for methylene blue (MB) and 90% for Tetracycline hydrochloride (TC) within 210 min irradiation at pH 7, and stability over 80% even after six cycles. Characterization results showed that the enhanced photocatalytic activity was mainly due to the strong interactions of MQDs/Bi2WO6 heterojunction and high specific surface area. A possible photocatalytic degradation mechanism was proposed on the basis of the identified intermediates. Furthermore, the Fe3O4/Bi2WO6/GNs composite could be easily recovered from the reaction system under an external magnetic field owing to its sufficient magnetism, therefore which has certain potential applications in water treatment process.

PUBLICATION RECORD

  • Publication year

    2019

  • Venue

    Journal of the Taiwan Institute of Chemical Engineers / Elsevier

  • Publication date

    2019-06-01

  • Fields of study

    Materials Science, Chemistry, Environmental Science

  • Identifiers
    DOI 10.1016/J.JTICE.2019.04.001
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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