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Browsing by Author "Pham Khac Vu"

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    Control of crystal phase of BiVO4 nanoparticles synthesized by microwave assisted method
    (2016-06)
    Nguyen Dang Phu
    ;
    Luc Huy Hoang
    ;
    Pham Khac Vu
    ;
    Kong, Meng-Hong
    ;
    Chen, Xiang-Bai
    Different crystalline phases BiVO4 nanoparticles (tetragonal-zircon, monoclinic-scheelite, and tetragonal-zircon/monoclinic-scheelite heterophase) have been prepared by fast microwave assisted method and annealing treatment. For the heterophase, the ratio of tetragonal-zircon and monoclinic-scheelite phases can be well controlled by controlling the annealing temperature. Furthermore, a tight interface junction has been formed between tetragonal-zircon BiVO4 and monoclinic-scheelite BiVO4 in a nanosize level. This tight interface junction can modify the electronic structure of BiVO4 nanoparticles, which would be very helpful for achieving high photocatalytic activity.