Effects of templates on the structure, stability and photocatalytic activity of mesostructured TiO2

被引：55

作者：

Dai, Q

Shi, LY

Luo, YG

Blin, JL

Li, D

Yuan, CW

Su, BL

机构：

[1] Southeast Univ, Inst Thermal & Energy Engn, Natl Lab Mol & Biomol Elect, Nanjing 210096, Peoples R China

[2] Univ Namur, ISIS, Lab Chim Mat Inorgan, B-5000 Namur, Belgium

[3] Univ Notre Dame, Ctr Mol Engn Mat, Notre Dame, IN 46556 USA

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2002年 / 148卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

TiO2; mesoporous materials; photocatalysis; pollutants;

D O I：

10.1016/S1010-6030(02)00056-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Using long-chain alkylphosphate and alkylamine surfactants as templates. two kinds of purely mesoporous TiO2 molecular sieves (Ti-TMS) were prepared by hydrolysis of titanium isopropoxide under completely different conditions. The templates can be successfully removed by refluxing the samples in an EtOH/H2O/HNO3 solution. Properties of the samples were characterized by means of SEM, FT-IR, DR-UV, TEM, XRD and TG-DTA techniques, XRD patterns and TEM images confirm that the uniformity and stability of Ti-TMS1 synthesized with dodecylphosphate, hexadecylphosphate, or octadecylphosphate as templates is superior to that of Ti-TMS2 prepared with dodecylamine. Furthermore, after the removal of the templates, the stability and the structure of the mesoporous Ti-TMS1 are better than that of Ti-TMS2. Effects of other factors on the structure and stability of Ti-TMS are discussed. The photocatalytic activities of Ti-TMS were also investigated by using polychlorophenol (TCP) and reactive red dye (X-3B) solutions as model pollutants. It was found that the amount of the templates greatly affects the photoactivity of these kind of mesoporous materials. 0 2002 Published by Elsevier Science B.V.

引用

页码：295 / 301

页数：7

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