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    One-pot approach for synthesis of N-doped TiO2/ZnFe2O4 hybrid as an efficient photocatalyst for degradation of aqueous organic pollutants

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    Authors
    Yao, Y.
    Qin, J.
    Chen, H.
    Wei, F.
    Liu, X.
    Wang, J.
    Wang, Shaobin
    Date
    2015
    Type
    Journal Article
    
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    Citation
    Yao, Y. and Qin, J. and Chen, H. and Wei, F. and Liu, X. and Wang, J. and Wang, S. 2015. One-pot approach for synthesis of N-doped TiO2/ZnFe2O4 hybrid as an efficient photocatalyst for degradation of aqueous organic pollutants. Journal of Hazardous Materials. 291: pp. 28-37.
    Source Title
    Journal of Hazardous Materials
    DOI
    10.1016/j.jhazmat.2015.02.042
    ISSN
    0304-3894
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/30264
    Collection
    • Curtin Research Publications
    Abstract

    N-doped TiO2/ZnFe2O4 showed to be a promising catalyst and simple separation. N-doped TiO2/ZnFe2O4 catalysts were successfully prepared by coupling nitrogen modified TiO2 with ZnFe2O4 via a one-pot vapor-thermal method. The physicochemical properties of the as-prepared catalysts have been characterized using various spectroscopic and microscopic techniques. The UV-vis-light-driven photocatalytic activities of the hybrids were evaluated and the effects of the amount of photocatalyst, different types of dyes, catalyst stability on photodegradation of organic dyes were investigated. Moreover, degradation kinetics and mechanism as well as the roles of N doping, ZnFe2O4 and TiO2 have been analyzed. It was revealed that N-doped TiO2/ZnFe2O4 exhibited an improved performance compared with TiO2/ZnFe2O4 or ZnFe2O4 because of the formation of a heterostructure at the interface as well as the introduction of N species. Active species such as holes, electrons, hydroxyl radicals, and superoxide radicals involved in the photodegradation process were detected by using different types of scavengers. Because of ZnFe2O4 in the hybrid, the catalyst shows ferromagnetism, and thus, the hybrid catalyst is easily isolated from the reaction mixture after the photocatalytic experiments. This work not only offers a simple method for the fabrication of N doped TiO2/ZnFe2O4 hybrids, but also provides an effective and conveniently recyclable photocatalyst for the purification of water.

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