Article

Microemulsion synthesis and photocatalytic activity of visible light-active BiVO4 nanoparticles

Science China-Chemistry (impact factor: 1.02). 04/2012; 54(5):724-729. DOI:10.1007/s11426-010-4156-z pp.724-729

ABSTRACT A water-in-oil microemulsion made up of a cyclohexane/n-hexyl alcohol/Polyethylene glycol tertoctylphenyl/aqueous solution
including Bi3+ and VO3+ ions yields the spherical BiVO4 precursors with the size from 5 to 300 nm. Well-crystallized monoclinic scheelite BiVO4 particles with nanometer or micrometer size are fabricated in control by heating microemulsion precursors under various temperatures.
The corresponding nucleation and growth process of as-prepared samples has also been investigated via TEM, which demonstrates
the detailed morphological evolution of nuclei inside the precursors. As-prepared BiVO4 photocatalysts exhibit enhanced photocatalytic activity under visible-light irradiation in comparison with the bulk BiVO4 prepared by solid-state reaction. The highest RB degrading efficiency of 98% in 180 min under visible-light irradiation is
observed for the sample calcined at 600 °C.

Keywordsbismuth–vanadium–microemulsion–chemical synthesis–photochemistry

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Keywords

As-prepared BiVO4 photocatalysts exhibit
 
as-prepared samples
 
corresponding nucleation
 
cyclohexane/n-hexyl alcohol/Polyethylene glycol tertoctylphenyl/aqueous solution
 
heating microemulsion precursors
 
highest RB degrading efficiency
 
Keywordsbismuth–vanadium–microemulsion–chemical synthesis–photochemistry
 
micrometer size
 
photocatalytic activity
 
sample calcined
 
solid-state reaction
 
VO3+ ions yields
 
water-in-oil microemulsion
 
Well-crystallized monoclinic scheelite BiVO4 particles