摘要
采用丙三醇水热法还原制备氧缺陷BiOI催化剂,利用XRD,SEM,N2吸附-脱附,EPR,XPS及点化学方法对样品的性能进行了表征,考察了样品在可见光下(λ>420 nm)对气相甲醛的光催化降解性能。结果表明:催化剂经过丙三醇处理后形成了Bi-Ov氧缺陷中心;缺陷的生成有效抑制了光生电子-空穴对的复合,催化剂的活性明显的增强;氧缺陷BiOI降解甲醛的转化率是BiOI的5倍。
Oxygen-deficient BiOI catalyst was prepared by glycerol reduction. The catalyst were characterized by XRD, SEM,N_2 iso-thermal,EPR,XPS and electrochemical analyses. The Photocatalytic performance of catalysts was evaluated by the degradation of gaseous HCHO under visible-light irradiation(λ > 420 nm). The results indicate that the oxygen-deficient BiOI possesses Bi-Ov oxygen vacancies. The formation of oxygen defects hinders photoinduced electron-hole pairs from recombination, which enhances the photocatalytic activity. The conversion rates of HCHO on the oxygen-deficient BiOI was five times as high as that on the pristine BiOI.
引文
[1]Fan,W;Li,H.;Zhao,F.;Xiao,X.;Huang,Y.;Ji,H.;Tong,Y.Chem.Commun.2016,DOI:10.1039/c6cc00903d.
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