Syntheses, Li Insertion, and Photoactivity of Mesoporous Crystalline TiO2

被引：124
作者：
Yue, Wenbo [1 ]
Randorn, Chamnan [1 ]
Attidekou, Pierrot S. [1 ]
Su, Zixue [1 ]
Irvine, John T. S. [1 ]
Zhou, Wuzong [1 ]
机构：
[1] Univ St Andrews, Sch Chem, St Andrews KY16 9ST, Fife, Scotland
来源：
ADVANCED FUNCTIONAL MATERIALS | 2009年 / 19卷 / 17期
基金：
英国工程与自然科学研究理事会;
关键词：
POROUS SINGLE-CRYSTALS; SOLAR-CELL PERFORMANCE; PHOTOCATALYTIC ACTIVITY; METAL-OXIDES; NEGATIVE ELECTRODE; LITHIUM INSERTION; METHYLENE-BLUE; ANATASE TIO2; SILICA; TITANIA;
D O I：
10.1002/adfm.200900658
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Ordered mesoporous rutile and anatase TiO2 samples are prepared using mesoporous silica SBA-15 as template and freshly synthesize titanium nitrate and titanium chloride solutions as precursors. The rutile material formed from the nitrate solution is monocrystalline and contains minimal amounts of Si with a Si:Ti ratio of 0.031(4), whereas the anatase material formed from the chloride solution comprises nanocrystals and contains a higher content of Si with a Si:Ti ratio of 0.18(3). It is found that control of temperature and selection of Ti-containing precursor play important roles in determining the crystal phase and crystallinity. A possible formation mechanism of porous crystalline TiO2 is suggested. Characterization of these porous materials is performed by XRD, HRTEM, and nitrogen adsorption/desorption. SBA-15-templated mesoporous rutile TiO2 exhibits higher Li ion insertion capability than KIT-6-templated TiO2 due to its larger surface area. Likewise mesoporous anatase TiO2:SiO2 composite has a better photoactivity than bulk TiO2 or TiO2-loaded SBA-15 for bleaching methylen blue.
引用
收藏
页码：2826 / 2833
页数：8
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