| 稀土改性Ni/TiO_2光催化剂及其重复利用催化活性 |
| |
| 引用本文： | 陈英,刘宝生,岑小龙.稀土改性Ni/TiO_2光催化剂及其重复利用催化活性[J].稀土,2010,31(1). |
| |
| 作者姓名： | 陈英 刘宝生 岑小龙 |
| |
| 作者单位： | 1. 浙江海洋学院,石油化工学院,浙江,舟山,316000
2. 茂名学院,化工与环境工程学院,广东,茂名,525000 |
| |
| 基金项目： | 国家自然科学基金项目资助，广东省自然科学基金项目资助，茂名市科技计划项目 |
| |
| 摘 要： | 用溶胶-凝胶法制备了La或Ce改性的0.3%Ni/TiO2(即La-Ni/TiO2或Ce-Ni/TiO2),考察了La-Ni/TiO2或Ce-Ni/TiO2在催化降解甲基橙水溶液过程中的重复利用性能,并用XRD、N2吸附-脱附以及XPS等手段对催化剂进行了表征分析。研究表明,适宜La和Ce掺杂量(La/Ti、Ce/Ti摩尔比)分别为0.15%和0.1%,适宜焙烧温度为400℃。在酸性条件下(pH=3),La-Ni/TiO2和Ce-Ni/TiO2与Ni/TiO2光降解甲基橙的能力相当,但La或Ce掺杂使Ni/TiO2催化剂的重复使用能力提高。催化剂上存在低结合能的低价钛离子(如Ti3+),低价钛离子的含量和结合能大小是衡量催化剂光催化降解活性的重要因素。可能是La或Ce使催化剂在使用过程中低价钛离子得到较好保留,从而使催化剂活性得到较好维持,催化剂重复使用性能提高。
|
| 关 键 词： | Ni/TiO_2光催化剂 重复使用性能 N_2吸附-脱附 甲基橙 |
The Rare Earth Modified Ni/TiO_2 Catalyst and Its Photocatalytic Activities in Recycle Process |
| |
| CHEN Ying,LIU Bao-sheng,CEN Xiao-long.The Rare Earth Modified Ni/TiO_2 Catalyst and Its Photocatalytic Activities in Recycle Process[J].Chinese Rare Earths,2010,31(1). |
| |
| Authors: | CHEN Ying LIU Bao-sheng CEN Xiao-long |
| |
| Affiliation: | CHEN Ying1,LIU Bao-sheng2,CEN Xiao-long2(1.College of Petrochemical Engneering,Zhejiang Ocean University,Zhejiang 316000,China,2.College of Chemical , Environmental Engineering,Maoming University,Maoming 525000,China) |
| |
| Abstract: | La-Ni/TiO2 and Ce-Ni/TiO2 were prepared by the sol-gel method and characterized by X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS) and N2 adsorption-desorption.The photocatalytic activities of the catalysts were investigated by degradation of methyl orange in aqueous solution.Both La-Ni/TiO2 and Ce-Ni/TiO2 photocatalytic activities were almost equal to that of Ni/TiO2in acid aqueous solution(pH=3).The photocataltic activities onused La-Ni/TiO2 and Ce-Ni/TiO2were much more than that on used Ni/T... |
| |
| Keywords: | La Ce XRD XPS photocatalyst Ni/TiO_2 lanthanum cerium photoactivity in recycling XRD XPS N_2 absorption-desorption methyl orange |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
