Synthesis of porous Bi0.5La0.5VO4 solid solution via a template method to improve photocatalytic activity for CO2 reduction
Photocatalytic CO2 reduction provides an ideal way to alleviate the greenhouse effect and obtain valuable chemicals.In this work,the porous Bi0.5La0.5VO4(BLV)solid solution photocatalytic materials with the specific surface area were synthesized by inhibiting the growth of photocatalyst particles by nano-spherical SiO2 template.Due to the confinement effect of nano-SiO2,the particle size of the solid solution prepared by the hard template method is significantly smaller than that of the solid solution prepared by the solid phase method.The results of the N2 adsorption-desorption test showed that the specific surface area of porous BLV prepared by calcination at 950℃ was 11.9 times that of bulk BLV.The evaluation of photocatalytic CO2 reduction activity shows that the CO evolution rate of porous BLV-950 solid solution is 0.58 μmol·g-1·h-1,which is 3.9 times that of bulk BLV.This is attributed to the fact that porous BLV has higher carrier separation efficiency and lower CO2 reduction interface resistance than bulk BLV.
photocatalytic CO2 reductionBi0.5La0.5VO4 solid solutiontemplate methodcharge separation
孙雨平、马洋博、刘小强、高丽、陈威
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河南大学,化学与分子科学学院,河南开封 475004
光催化CO2还原 Bi0.5La0.5VO4固溶体 模板法 电荷分离
国家自然科学基金Project of Department of Science and Technology,Henan Province
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