两种络合剂对CeSnO复合氧化物结构与性能的影响.pdfVIP

理化学学报(Wuli Huaxue Xuebao) May Acta Phys. Chim. Sin., 2007, 23(5) ：659-663 659 [Article] 两种络合剂对Ce Sn O 复合氧化物结构与性能的影响 晓菲 胡瑞生 高官俊 孟 和 苏海全 ( 内蒙古大学化学化工学院稀土材料重点实验室, 内蒙古呼和浩特 010021) 摘要： 分别以柠檬酸、葡萄糖为络合剂, 用溶胶凝胶法制备了CeO2 和掺杂少量Sn 的Ce Sn O 复合氧化 , 利 用XRD 、TPR 、FT IR 、比表面法、TEM 等方法表征了四种催化剂的 理化学性质, 同时以甲烷催化燃烧反应为 针对其进行了活性评价. 结果表明, 以葡萄糖为络合剂合成的掺杂锡后的样品其甲烷完全转化温度较低, 比表面 积较大, 通过透射电子显微镜观察, 平均晶粒大小为14 nm 左右, 且分散性良好, 而相比之下柠檬酸为络合剂合 成的样品出现明显的团聚现象. 关键词： 葡萄糖; 柠檬酸; 溶胶凝胶法; 甲烷燃烧 中图分类号： O643 Influence of Two Complexants on Structure and Performance of Ce Sn O Complex Oxides ZHANG Xiao Fei HU Rui Sheng GAO Guan Jun MENG He SU Hai Quan (Key Laboratory of Rare Earth Materials, College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, P. R. China) Abstract ： The CeO and Ce Sn O complex oxides were prepared by sol gel method using citric acid and glucose as 2 complexing agents, respectively. The complex oxides were characterized by XRD, TPR, FT IR, BET, and TEM, and their catalytic activities for the combustion of methane were evaluted. The results showed that the Ce Sn O complex oxide which used glucose as complexing agent, had lower complete methane conversion temperature and larger specific surface area. The TEM analysis of the Ce Sn O complex oxide, which used glucose as complexing agent revealed that the particles had