TiO2 supported on rod-like mesoporous silica SBA-15: Preparation, characterization and photocatalytic behaviour

被引：20

作者：

Li, Yanjuan ^{[1
]}

Li, Nan ^{[1
]}

Tu, Jinchun ^{[1
,2
]}

Li, Xiaotian ^{[1
]}

Wang, Beibei ^{[1
]}

Chi, Yue ^{[1
]}

Liu, Darui ^{[1
]}

Yang, Dianfan ^{[1
]}

机构：

[1] Jilin Univ, Coll Mat Sci & Engn, Key Lab Automobile Mat, Minist Educ, Changchun 130012, Peoples R China

[2] Hainan Univ, Minist Educ, Coll Mat & Chem Engn, Key Lab Trop Biol Resources, Haikou 570228, Peoples R China

来源：

MATERIALS RESEARCH BULLETIN | 2011年 / 46卷 / 12期

基金：

中国国家自然科学基金;

关键词：

Oxides; Chemical synthesis; X-ray diffraction; Catalytic properties; COMPOSITE NANOPARTICLES; BIOMATERIAL SYSTEM; MAGNETIC CORE; TITANIA; DEGRADATION; TEMPERATURE; MATRIX; SHELL;

D O I：

10.1016/j.materresbull.2011.08.044

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

TiO2 nanoparticles have been successfully incorporated in the pores of mesoporous silica SBA-15 with different morphologies by a wet impregnation method. The composites were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), inductively coupled plasma (ICP) emission spectroscopy, transmission electron microscopy (TEM), N-2-sorption and UV-Vis diffuse reflectance spectroscopy. The photodegradation of methyl orange (MO) was used to study their photocatalytic property. It is indicated that the morphology of SBA-15 had a great influence on the photocatalytic activity of the composites. When TiO2/SBA-15 composite was prepared by loading TiO2 nanoparticles on uniform rod-like SBA-15 of 1 mu m length, it showed higher photocatalytic degradation rate than that on less regular but much larger SBA-15 support. This difference was rationalized in terms of the homogeneously distributed and shorter channels of rod-like SBA-15, which favored mass transport and improved the efficient utilization of the pore surface. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：2317 / 2322

页数：6

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