【作者】 燕宁宁； 张莹； 龚昌杰； 朱忠其； 柳清菊；

【Author】 Yan ningning,Zhang ying,Gong changjie,Zhu zhongqi,LIU Qing-ju~* (Yunnan Key laboratory of nanomaterials & technology,Yunnan University,Kunming 650091,China)

【机构】 云南省高校纳米材料与技术重点实验室云南大学；

【摘要】 本文采用溶胶-凝胶法制备了稀土Ce离子掺杂的纳米TiO₂光催化剂（Ce-TiO₂）,通过XRD、UV-Vis、纳米粒度分析仪等对Ce-TiO₂样品进行了表征和分析,并以亚甲基蓝（MB）作为目标降解物,主要考察经不同温度热处理后的Ce-TiO₂样品对MB的光催化降解效果,结果表明:所制备样品的晶型均为锐钛矿相和金红石相的混晶相,Ce离子的掺杂拓展了TiO₂在可见光区的光谱响应范围,提高了其光催化活性。在本实验范围内,经600℃热处理所制备的光催化剂的催化活性显著高于Degussa P25。更多还原

【Abstract】 The nano-TiO₂ doped with Ce was prepared by sol-gel method.The samples were analyzed by X-ray diffraction（XRD）,UV-Vis,Nano Particle Size Analyzer,et al.The photocatalytic activity of Ce-TiO₂ was investigated at different calcinated temperatures by measuring the degradation rate of methyl blue（MB） under the irradiation of fluorescent lamp.The results show that crystal phase of Ce-TiO₂ samples are all mixed phase of anatase and rutile.The existence of the doped element Ce expands TiO₂’s spectrum absorption under the visible light,and increases the photocatalytic activity of TiO₂.Meanwhile,the photocatalytic activity of the sample at the calcinated temperature of 600℃is the best,and it is obvious higher than that of P25.更多还原