Synthesis of TiO2 nanoparticles on mesoporous aluminosilicate Al-SBA-15 in supercritical CO2 for photocatalytic decolorization of methylene blue

被引：21

作者：

Chang, Fei ^{[1
]}

Wang, Gang ^{[1
]}

Xie, Yunchao ^{[1
]}

Zhang, Min ^{[1
]}

Zhang, Jian ^{[1
]}

Yang, Hai-Jian ^{[2
,3
]}

Hu, Xuefeng ^{[4
]}

机构：

[1] Shanghai Univ Sci & Technol, Sch Environm & Architecture, Shanghai 200093, Peoples R China

[2] South Cent Univ Nationalities, Key Lab Catalysis & Mat Sci, State Ethn Affairs Commiss, Coll Chem & Mat Sci, Wuhan 430074, Peoples R China

[3] South Cent Univ Nationalities, Coll Chem & Mat Sci, Minist Educ, Key Lab Analyt Chem,State Ethn Affairs Commiss, Wuhan 430074, Hubei Province, Peoples R China

[4] Chinese Acad Sci, Key Lab Coastal Zone Environm Proc, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2013年 / 39卷 / 04期

基金：

中国国家自然科学基金;

关键词：

TiO2; Aluminosilicate; SBA-15; Supercritical carbon dioxide; WATER-TREATMENT; GAS-PHASE; SBA-15; OXIDATION; SILICA; PARTICLES; COPOLYMER; TRIBLOCK; DESIGN;

D O I：

10.1016/j.ceramint.2012.10.223

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In the present study, titania nanoparticles were first constructed on mesoporous aluminosilicate Al-SBA-15 in supercritical carbon dioxide (Sc-CO2) and the resultant samples were characterized by a combination of Various techniques, such as X-ray diffraction (XRD), nitrogen physisorption, Al-27 MAS NMR, UV-vis diffuse reflectance spectroscopy, and transmission electron microscopy (TEM). It was identified that the Al species incorporated samples retained structures similar to that of the parent SBA-15. In addition, the content of titania loading varied with reaction temperature and time in Sc-CO2. As-synthesized TiO2/Al-SBA-15 samples were evaluated in terms of photocatalytic decolorization of methylene blue in aqueous solutions. It was observed that all TiO2/Al-SBA-15 samples showed satisfactory decolorization efficiency that was much higher than those of TiO2/SBA-15 and commercial TiO2 under identical conditions, which could be mainly attributed to the effective adsorption capability, resulting from the extension of specific surface area after substitution of Si species with Al species. (C) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：3823 / 3829

页数：7

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