四丁基锡在MCM-41表面的接枝反应及其产物表征  

Grafting Reaction of Tetrabutyltin on the MCM-41 Surface and Characterization of the Grafted Product

作　　者：徐海兵[1] 王绪绪[1] 付贤智[1] 

机构地区：[1]福州大学光催化研究所,福建福州350002

出　　处：《光谱学与光谱分析》2005年第3期470-472,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金 (2 0 1 730 0 9;2 0 3730 1 1 )资助项目

摘　　要：采用XRD ,FTIR ,UV -VisDRS和TG等手段对四丁基锡改性的MCM 4 1及其在高纯氧气流中焙烧后得到的Sn- O- MCM- 4 1介孔分子筛进行了表征 ,发现焙烧前后样品的水热稳定性、表面酸性以及表面锡物种的配位形式明显不同。焙烧后表面锡原子仍保持四配位形式 ,水热稳定性提高 ,表面L酸酸性增强。据此对Sn -O- MCM- 4 1样品催化活性提高的原因进行了讨论。MCM-41 modified with tetrabutyltin and Sn-O-MCM-41 obtained from calcination of the modified MCM-41 in pure oxygen were characterized by XRD, FTIR, UV-Vis DRS, and TG analysis. It was found that the hydrothermal stability, surface acidity, and coordinative states of tin atoms on both samples were evidently different. After calcination, the surface tin atoms of sample remained in the tetrahedronal structure, and the hydrothermal stability and surface acidity were improved. According to the results, the reason for the enhancement of catalytic activity of Sn-O-MCM-41 was discussed.

关 键 词：四丁基锡 MCM-41 接枝反应 水热稳定性 表征 增强 改性 配位 原子 表面 

分 类 号：O643[理学—物理化学] TQ264.22[理学—化学]