Direct synthesis of Cerium(III)-incorporated SBA-15 mesoporous molecular sieves by two-step synthesis method

被引：86

作者：

Dai, Qiguang ^{[1
]}

Wang, Xingyi ^{[1
]}

Chen, Guoping ^{[1
]}

Zheng, Yi ^{[1
]}

Lu, Guanzhong ^{[1
]}

机构：

[1] E China Univ Sci & Technol, Adv Mat Lab, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2007年 / 100卷 / 1-3期

基金：

中国国家自然科学基金;

关键词：

SBA-15; cerium; acid media; two-step synthesis method; pore size;

D O I：

10.1016/j.micromeso.2006.11.015

中图分类号：

O69 [应用化学];

学科分类号：

081704 [应用化学];

摘要：

Cerium(III)-incorporated SBA-15 (Cc-SBA-15) mesoporous molecular sieves were successfully synthesized by a two-step direct synthesis method in acid media, and characterized by XRD, UV-vis, ESR, TEM, N-2 adsorption and FT-IR. The Ce-SBA-15 samples prepared show highly ordered mesostructures with larger pore diameter, pore volume and uniform mesopore size distribution. The valence of cerium species incorporated into the frameworks of SBA-15 can be controlled by adjusting the pH value of the synthesis solution accurately. When the pH value of the solution is <= 6.0, Ce(III)-SBA-15 can be synthesized. If the pH value is higher than 6.0, the cerium species exist in the SBA-15 sample in form of Ce(IV). Moreover, it can be found that the two-step synthesis method is a feasible, effective and simple method to expand the pore size and the pore volume of SBA-15. (c) 2006 Elsevier Inc. All rights reserved.

引用

页码：268 / 275

页数：8

共 31 条

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