| SO42-改性后的TiO2(锐钛和/或金红石)表面上MoO3的分散性质研究 |
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| 引用本文： | 张丽萍,朱海洋,李晓伟,万海勤,董林.SO42-改性后的TiO2(锐钛和/或金红石)表面上MoO3的分散性质研究[J].无机化学学报,2007,23(4):577-583. |
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| 作者姓名： | 张丽萍 朱海洋 李晓伟 万海勤 董林 |
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| 作者单位： | 1. 四川理工学院材料与化学工程系,自贡,643000
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 |
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| 摘 要： | 采用红外(IR)、拉曼(Raman)、X-射线衍射(XRD)、程序升温还原(TPR)等方法考察了经硫酸根改性后的金红石(SR)与锐钛矿(SA)的混合比例变化时的负载型催化剂，MoO3 / TiO2(SR+SA)，的一些物理化学性质(如活性组分MoO3的分散行为、表面酸碱性、氧化还原性)的变化规律。结果表明：对于MoO3 / TiO2(SR+SA)样品，低含量MoO3表面分散时倾向于优先与混合载体中的改性金红石(SR)发生作用；TiO2载体表面SO42-的存在，使得载体表面产生了新的酸性位，导致样品中表面分散的钼物种主要以聚合八面体状态存在。
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| 关 键 词： | MoO3 SO42- TiO2 |
| 文章编号： | 1001-4861(2007)04-0577-07 |
| 修稿时间： | 2006-11-28 |
Dispersion Behaviors of Molybdena on SO42--modified TiO2 (Rutile and/or Anatase) |
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| ZHANG Li-Ping,ZHU Hai-Yang,LI Xiao-Wei,WAN Hai-Qin and DONG Lin.Dispersion Behaviors of Molybdena on SO42--modified TiO2 (Rutile and/or Anatase)[J].Chinese Journal of Inorganic Chemistry,2007,23(4):577-583. |
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| Authors: | ZHANG Li-Ping ZHU Hai-Yang LI Xiao-Wei WAN Hai-Qin and DONG Lin |
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| Institution: | Department of Materials and Chemical Engineering, Sichuan Institute of Science and Technology, Zigong, Sichuan 643000,Key Laboratory of Mesoscopic Chemistry of MOE, Department of Chemistry, Nanjing University, Nanjing 210093,Key Laboratory of Mesoscopic Chemistry of MOE, Department of Chemistry, Nanjing University, Nanjing 210093,Key Laboratory of Mesoscopic Chemistry of MOE, Department of Chemistry, Nanjing University, Nanjing 210093 and Key Laboratory of Mesoscopic Chemistry of MOE, Department of Chemistry, Nanjing University, Nanjing 210093 |
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| Abstract: | FTIR, Raman, XRD and TPR were employed to investigate the influence of SO42- on the physical che-mistry properties (such as dispersion of molybdena, surface acidity, oxidation and reduction) of MoO3 supported on mixed TiO2 with different rutile (SR) and anatase (SA) ratios. The results indicated that (1) molybdena would preferentially disperse on SR surface in the mixed TiO2 (SR+SA); (2) the existence of surface SO42- would create the Br?nsted acid sites on rutile surface and lead to the formation of polymeric octahedral molybdena species instead of the isolated molybdena species. |
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| Keywords: | MoO3 SO42- TiO2 |
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