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Issue 12, 2011
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Size-controlled synthesis of BiPO4 nanocrystals for enhanced photocatalytic performance

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Abstract

Well dispersed BiPO4 nanocrystals with a diameter of ∼9 nm are synthesized in oleic acid (OA) and bis(2-ethylhexyl) phosphate (BEHP) media by a high-temperature hydrolysis reaction. OA absorbed on the surface of the nanocrystals helps make a monodispersion. In this reaction, the diameters of the as prepared BiPO4 nanocrystals can be controlled from 9 nm to 250 nm by changing the OA/BEHP ratio (v/v). The roles of BEHP and OA during the formation of the nanocrystals and for tuning the grain size of the particles have been discussed, and a possible formation mechanism of the nanocrystals is proposed. BiPO4 nanocrystals with a diameter of ∼9 nm after OA removal show the highest activity for degradation of methylene blue solution in the UV region, which is also nearly twice the reported activity of BiPO4, and 2.6 times higher than that of P25. The high Brunauer–Emmett–Teller (BET) surface, large band gap, surface effect, and short mobility distance for carriers to the surface are recognized as the key factors for the high photocatalytic activity of nanocrystals.

Graphical abstract: Size-controlled synthesis of BiPO4 nanocrystals for enhanced photocatalytic performance

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Publication details

The article was received on 27 Oct 2010, accepted on 21 Dec 2010 and first published on 03 Feb 2011


Article type: Paper
DOI: 10.1039/C0JM03655B
Citation: J. Mater. Chem., 2011,21, 4235-4241
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    Size-controlled synthesis of BiPO4 nanocrystals for enhanced photocatalytic performance

    C. Pan and Y. Zhu, J. Mater. Chem., 2011, 21, 4235
    DOI: 10.1039/C0JM03655B

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