采用液相沉淀法制备了银(Ag~+)掺杂钒酸铁(FeVO_4)光催化剂.采用XRD、SEM、EDS、BET和XPS等手段对样品的性能进行了表征分析,并以甲基橙为目标降解物,考察了催化剂在节能灯照射下的光催化活性.结果表明,Ag的掺杂没有改变FeVO_4晶型,但引起了晶格畸变和膨胀.适量Ag的掺杂可提高FeVO_4的光催化性能,在所进行实验的条件下,钒酸银最佳掺杂量为1%(质量分数)时,掺杂后的FeVO_4对甲基橙溶液的脱色率较未掺杂前提高21%左右.
Silver(Ag~+) doped iron(Ⅲ) vanadate( FeVO_4) sanples were prepared by the liquid phase precipitation method.The obtained samples were characterized by XRD,SEM,BET and XPS and their photocatalytic activity was studied by photocatalytic oxidation of methyl orange under energy-saving lamp irradiation.The XRD patterns indicated that Ag~+/FeV_O4 photocatalysts consist of triclinic phase and the lattice was distorted beacause of doping Ag.Doping with the appropriate Ag content can improve the photocatalytic activity of FeVO_4.In the experimental conditions used,the optimal photocatalytic activity for all the prepared samples is reached when the Ag doping was 1wt%.The decoloration rate of MO was more 20% or so than that of pure FeVO_4.
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