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OALib Journal期刊
ISSN: 2333-9721
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Ba~(2+)掺杂FeVO_4光催化剂的制备及光催化性能
Abstract:
用液相沉淀法制备了钡掺杂钒酸铁(FeVO4)光催化剂。采用X射线衍射、扫描电子显微镜、能谱、比表面积、紫外-可见漫反射光谱和X射线光电子能谱对样品进行表征,并以甲基橙为模拟污染物对光催化性能进行测定。结果表明Ba2+掺杂没有改变FeVO4晶型,部分Ba2+进入FeVO4晶格中引起晶格膨胀,晶胞体积增大。掺杂后表面形貌产生了较大变化,掺杂的钡生成新相BaV2O6附着在FeVO4晶体表面,起到表面修饰作用,但其比表面积基本无变化。掺杂Ba2+后其光吸收能力增强,禁带宽度减小。光催化脱色甲基橙溶液表明,适量Ba2+掺杂可提高FeVO4的光催化性能,在所进行的实验条件下,钒酸钡最佳掺杂量为12%(质量分数)时,掺杂后FeVO4对甲基橙溶液的脱色率较未掺杂前的提高31%左右。
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