Cu、Ag、Au掺杂BiVO_4可见光催化剂的制备及性能研究  

Study on Synthesis and Photocatalytic Activity of Cu、Ag、Au Doped BiVO_4 Photocatalysts

作　　者：张爱平[1] 张进治[1] 

机构地区：[1]北方工业大学理学院,北京100144

出　　处：《分子催化》2010年第1期51-56,共6页Journal of Molecular Catalysis(China)

基　　金：北京市教委面上项目(No.KM200910009011)资助

摘　　要：水热法制备了币族金属(Cu、Ag和Au)掺杂的BiVO4可见光催化剂,借助X-射线衍射(XRD)、X-射线光电子能谱(XPS)、紫外-可见漫反射光谱(DRS)和扫描电子显微镜(SEM)对其进行表征.XRD分析显示所有催化剂都呈现单斜结构.XPS结果显示掺杂元素均以其稳定氧化态形式存在与催化剂表面.DRS谱中掺杂样品的吸收边界比纯BiVO4都有不同程度的红移.以甲基橙的可见光催化降解反应为探针,研究了催化剂的可见光催化性能.结果表明,经币族金属掺杂改性的催化剂催化能力比纯BiVO4有所提高.对其掺杂增强催化能力的可能原因进行了分析讨论.The coin metal （Cu-, Ag- and Au-） doped BiVO4 were hydrothermal synthesized and characterized by X-ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS）, UV-vis diffused reflectance spectroscopy （DRS） and scanning electron microscopy （SEM）. The XRD analysis showed that all photoeatalysts had the same crystal forms with the single monoclinic sheelite structure. The XPS results showed that coin metal existed on the surface of M-BiVO4 catalysts （M = Cu, Ag and Au） as their stable oxide cation species. The red-shift of their absorption edge by DRS studies was obtained. The photocatalytie activity was investigated using methyl orange as a photocatalytic degradation model reactant. The results showed that all the M-doped catalysts have enhanced photocatalytic activities under visible-light irradiation. The enhanced photocatalytic mechanism was also discussed.

关 键 词：BIVO4 掺杂 光催化 可见光 水热法. 

分 类 号：O643.3[理学—物理化学]