| Ce及N共掺杂改性TiO_2光催化性能及Ce组分的作用 |
| |
| 引用本文： | 吴俊明,王亚平,杨汉培,范以宁,许波连.Ce及N共掺杂改性TiO_2光催化性能及Ce组分的作用[J].无机化学学报,2010,26(2):203-210. |
| |
| 作者姓名： | 吴俊明 王亚平 杨汉培 范以宁 许波连 |
| |
| 作者单位： | 1. 河海大学水文水资源与水利工程科学国家重点实验室,河海大学环境科学与工程学院,"浅水湖泊综合治理与资源开发"教育部重点实验室,南京,210098
2. 南京大学化学化工学院,介观化学教育部重点实验室,南京,210093 |
| |
| 基金项目： | 河海大学自然科学基金(理科类) |
| |
| 摘 要： | 以钛酸正丁酯、硝酸亚铈及氨水为前驱体运用溶胶-凝胶法对TiO2进行Ce及N单一和共掺杂改性,以甲基橙光催化降解为探针考察掺杂组分对催化剂的紫外、可见光活性影响,观察到了Ce及N的单一掺杂及共掺杂催化剂紫外、可见光活性的明显提升。运用X射线衍射(XRD)、低温氮气吸附(BET)、紫外-可见漫反射吸收光谱(DRS)、程序升温氧脱附(TPD)和程序升温氧化(TPO)等表征手段从催化剂的晶体结构及形貌、比表面积、紫外及可见光响应特性、表面吸附氧量及吸附氧循环性能等方面尝试理解掺杂组分的光活性影响机制。实验结果表明掺杂改性催化剂中适量Ce组分的作用在于通过抑制催化剂的晶粒长大、团聚和锐钛结构向金红石结构的相转变,提高催化剂的光相应强度和拓展光响应范围,增加催化剂表面吸附氧容量和促进催化剂的表面氧循环,有效捕获光生载流子,衍生各类高活性自由基物种和增大催化剂比表面积等方面增进催化剂的光催化性能。
|
| 关 键 词： | 二氧化钛 光催化 掺杂改性 铈 氮 |
Photocatalytic Properties and the Role of Ce in Co-Doped TiO2 with Ce and N |
| |
| WU Jun-Ming,WANG Ya-Ping,YANG Han-Pei,FAN Yi-Ning and XU Bo-Lian.Photocatalytic Properties and the Role of Ce in Co-Doped TiO2 with Ce and N[J].Chinese Journal of Inorganic Chemistry,2010,26(2):203-210. |
| |
| Authors: | WU Jun-Ming WANG Ya-Ping YANG Han-Pei FAN Yi-Ning and XU Bo-Lian |
| |
| Institution: | State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, College of Environment Science and Engineering, Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hehai University, Nanjin,State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, College of Environment Science and Engineering, Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hehai University, Nanjin,State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, College of Environment Science and Engineering, Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hehai University, Nanjin,Department of Chemistry, Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Nanjing University, Nanjing 210093 and Department of Chemistry, Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Nanjing University, Nanjing 210093 |
| |
| Abstract: | Ce and/or N doped TiO2 catalysts were prepared by sol-gel process with tetrabutyl titanate,cerium nitrate and ammonia as raw materials.The photo catalytic activity of the as-prepared catalysts under both ultraviolet and visible light irradiation was evaluated by degradation of methyl orange.Significant improvement of photocatalytic activity were observed by codoping of TiO2 with Ce and N.X-ray diffraction(XRD),low temperature N2 adsorption(BET),UV-Vis diffuse reflectance spectroscopy(DRS),temperature progra... |
| |
| Keywords: | titanium dioxide photocatalysis codoping modification cerium nitrogen |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《无机化学学报》浏览原始摘要信息 |
| 点击此处可从《无机化学学报》下载免费的PDF全文 |
|
