Microemulsion synthesis and photocatalytic activity of visible light-active BiVO_4 nanoparticles  

作　　者：LIU Wei WANG XiangFei CAO LiXin SU Ge ZHANG Lan WANG Yong Gang 

机构地区：[1]Institute of Materials Science and Engineering,Ocean University of China,Qingdao 266100,China

出　　处：《Science China Chemistry》2011年第5期724-729,共6页中国科学（化学英文版）

基　　金：supported by the Foundation for Outstanding Young Scientist of Shandong Province (BS2010CL049);the Program for New Cen-tury Excellent Talents in University (NCET-08-0511)

摘　　要：A water-in-oil microemulsion made up of a cyclohexane/n-hexyl alcohol/Polyethylene glycol tertoctylphenyl/aqueous solution including Bi3+ and VO+3 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.A water-in-oil microemulsion made up of a cyclohexane/n-hexyl alcohol/Polyethylene glycol tertoctylphenyl/aqueous solution including Bi3＋ and VO＋3 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.

关 键 词：BISMUTH VANADIUM MICROEMULSION chemical synthesis PHOTOCHEMISTRY 

分 类 号：O643.36[理学—物理化学] O648.23[理学—化学]