Facile photoinduced self-assembly synthesis of Ti-substituted mesoporous silica

被引：1

作者：

Wu, Mei ^{[1
,2
]}

Li, Xinhao ^{[1
]}

Jiang, Wenbing ^{[1
]}

Xu, Wen ^{[1
]}

Ni, Lingli ^{[1
,2
]}

Li, Shuang ^{[1
]}

Gao, Yuan ^{[1
]}

Han, Haifeng ^{[1
,3
]}

Jiang, Jinlong ^{[1
,2
]}

Chen, Jing ^{[1
,2
]}

机构：

[1] Huaiyin Inst Technol, Fac Chem Engn, Key Lab Palygorskite Sci & Appl Technol Jiangsu P, Huaian 223003, Peoples R China

[2] Natl & Local Joint Engn Res Ctr Deep Utilizat Tec, Huaian 223003, Peoples R China

[3] Jiangsu HanbonSci & Tech Co Ltd, 1-9 Jixian Rd, Huaian 223003, Peoples R China

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2020年 / 294卷

基金：

中国国家自然科学基金;

关键词：

Photoinduced; Mesoporous structure; Ti-substituted; Silica; Ti coordination; MOLECULAR-SIEVES; SCALING-UP; OXIDATION; TS-1; CYCLOHEXANE; CATALYST; ZEOLITE; FILMS; PHASE;

D O I：

10.1016/j.micromeso.2019.109876

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Series of mesoporous Ti-substituted silica catalysts (PSMTS) with different silicon to titanium ratios and highly ordered mesoporous structures were prepared by facile photoinduced self-assembly method. The effects of Ti loading and synthesis conditions including irradiation time/strength and the photo-acid generator content on mesoporous structure and Ti coordination environment were thoroughly studied using various characterization methods. Catalytic performances were evaluated by the selective cyclohexane oxidation, which revealed that catalysts with Si/Ti molar ratio higher than 40 had ordered mesoporous channels and isolated framework Ti in tetrahedral coordination, and showing the optimum catalytic performances (52% conversion of cyclohexane and ca. 99% selectivity to cyclohexanone and cyclohexanol). Nevertheless, the increase of Ti loading resulted in relative disordered mesoporous channels and more extra-framework octahedral Ti species, and in turn giving rise to inferior catalytic performances. Moreover, it testified that the optimum photoinduced conditions for Ti incorporation are 15min irradiation time, 18 mW/cm(2) irradiation strength and 3 wt% photo-acid generator.

引用

页数：7

共 28 条

[1] TEMPLATING OF MESOPOROUS MOLECULAR-SIEVES BY NONIONIC POLYETHYLENE OXIDE SURFACTANTS [J].