Ti incorporation in MCM-41 mesoporous molecular sieves using hydrothermal synthesis

被引：0
作者：
Shengping Wang
Changqing Ma
Yun Shi
Xinbin Ma
机构：
[1] Tianjin University; Collaborative Innovation Center of Chemical Science and Engineering,Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology
[2] Patent Examination Cooperation Center of the Patent Office,undefined
[3] SIPO,undefined
来源：
Frontiers of Chemical Science and Engineering | 2014年 / 8卷
关键词：
Ti-MCM-41; mesoporous molecular sieve; acid sites; transesterification; hydrothermal synthesis;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Titanium-containing mesoporous materials (Ti-MCM-41) were obtained by hydrothermal synthesis. Such materials are active catalysts for the transesterification of dimethyl oxalate and phenol to produce diphenyl oxalate. To understand the role of the Ti in the catalytic process, Ti-MCM-41 samples with different Si/Ti ratios (from 5 to 100) were prepared and the samples were analyzed by Fourier transform infrared spectroscopy, UV-visible spectroscopy, and ammonia temperature programmed desorption. It was concluded that the Ti is incorporated into the framework of the MCM-41 and formed weak Lewis acid sites. In addition, the number of Ti(IV) sites increased as the amount of titanium increased. X-ray powder diffraction, N2 adsorption-desorption and transmission electron microscopy results showed that the Ti-MCM-41 samples have a hexagonal arrangement of mono-dimensional pores. A large number of Ti(IV) sites coupled with the mesoporous structure and large pore diameters are favorable for the transesterification catalytic properties of Ti-MCM-41.
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页码：95 / 103
页数：8
相关论文
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