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BiVO4 hollow microplates: controlled synthesis and enhanced photocatalytic activity achieved through one-step boron doping and Co(OH)2 loading

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Abstract

The fabrication of hollow micro- and nanocrystals can not only increase the specific surface area of the materials but also benefit the understanding of the crystal facet-dependent catalytic activity. On the other hand, both the rational doping of heteroatoms and loading of co-catalysts can enhance the photocatalytic activity of semiconductor-based photocatalysts. However, up to now, there have been only a few reports on the synergetic effect of the two. In this work, BiVO4 hollow microplates (HMPs) and solid microplates (SMPs) were synthesized by a facile hydrothermal route, and B3+ ion-doped BiVO4 HMPs loaded with Co(OH)2 nanoparticles [Co(OH)2/B–BiVO4] were prepared through a one-step impregnation method. The as-prepared products were characterized in detail. The formation mechanism of BiVO4 HMPs was also proposed on the basis of time-dependent SEM observations and XRD analyses. Taking rhodamine B (RhB) as a kind of pollutant model, the photocatalytic activities of BiVO4 HMPs, BiVO4 SMPs, B3+ ion-doped BiVO4 HMPs, BiVO4 HMPs loaded with Co(OH)2 nanoparticles, and Co(OH)2/B–BiVO4 HMPs were systematically studied. The results show that {010}-dominant BiVO4 SMPs exhibited better photocatalytic activity for the degradation of RhB than {010} and {110}-dominant BiVO4 HMPs. In addition, the doping of B3+ ions and loading of Co(OH)2 nanoparticles could synergistically enhance the photocatalytic activity of BiVO4 HMPs. The present study not only provides reliable evidence for the crystal facet-dependent photocatalytic activity of BiVO4 but also develops a new strategy for enhancing its photocatalytic activity.

Graphical abstract: BiVO4 hollow microplates: controlled synthesis and enhanced photocatalytic activity achieved through one-step boron doping and Co(OH)2 loading

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Publication details

The article was received on 26 Jul 2017, accepted on 19 Sep 2017 and first published on 19 Sep 2017


Article type: Paper
DOI: 10.1039/C7CE01369H
Citation: CrystEngComm, 2017, Advance Article
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    BiVO4 hollow microplates: controlled synthesis and enhanced photocatalytic activity achieved through one-step boron doping and Co(OH)2 loading

    A. Adenle, D. Ma, D. Qu, W. Chen and S. Huang, CrystEngComm, 2017, Advance Article , DOI: 10.1039/C7CE01369H

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