【摘要】 采用水热法制备了铜修饰钒酸铋/膨润土（Cu-BiVO₄/BTT）复合材料,借助X射线衍射（XRD）、扫描电子显微镜（SEM）、X射线光电子能谱（XPS）和紫外-可见漫反射吸收光谱（DRS）对其进行表征。XRD分析显示,所制备的催化剂中BiVO₄均保持单斜结构,SEM结果证实了钒酸铋负载到了膨润土上,XPS结果显示Cu元素以CuO形式存在于催化剂表面,DRS结果显示复合材料在可见光区域的吸收增强。研究表明,当Cu与Bi的摩尔比为1.2时,复合材料光催化活性最高,经可见光照射3h,对模型汽油脱硫率达91%。更多还原

【Abstract】 Copper modified bismuth vanadate/bentonite（Cu-BiVO₄/BTT）nanocomposites were hydrothermally synthesized,and characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,X-ray photoelectron spectroscopy（XPS）,and UV-Vis diffuse reflectance spectroscopy（DRS）.XRD showed that all the photocatalysts had the same single monoclinic sheelite structure.SEM results confirmed that BiVO₄ was loaded to BTT.XPS results shown that Cu existed on the surface of the BiVO₄ catalysts as their stable oxide cation species CuO.DRS results shown the absorption of nanocomposites was enhanced in the visible region.The highest desulfurization rate of model oil can reach 91% under the visible light irradiation for 3 hwhen the molar ratio of Cu to Bi was equal to 1.2.更多还原