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双介孔结构的纳米TiO2/I2复合材料的制备及其可见光催化性能
引用本文:许璞,高善民,徐彦宾,黄柏标,戴瑛,于忠玺,王玉宝.双介孔结构的纳米TiO2/I2复合材料的制备及其可见光催化性能[J].化学学报,2010,68(9).
作者姓名:许璞  高善民  徐彦宾  黄柏标  戴瑛  于忠玺  王玉宝
作者单位:1. 鲁东大学化学与材料科学学院,烟台,264025
2. 鲁东大学化学与材料科学学院,烟台,264025;山东大学晶体材料国家重点实验室,济南,250100
3. 山东大学晶体材料国家重点实验室,济南,250100
基金项目:国家重点基础研究发展规划(973计划),山东省中青年科学家科研奖励基金,山东省教育厅科研计划 
摘    要:以钛酸丁酯为前驱体,碘溶胶为碘源,在室温下采用水解沉淀法制备了单质碘和纳米TiO2复合的双介孔结构光催化剂(M-I2-TiO2).采用X射线衍射(XRD)、透射电子显微镜(TEM)、比表面分析(BET)、紫外-可见(UV-Vis)漫反射光谱和傅里叶变换-红外光谱(FT-IR)对M-I2-TiO2进行了表征.以次甲基蓝(MB)溶液为模拟废水,对M-I2-TiO2的光催化性能进行了评价,研究了不同热处理温度对光催化活性的影响.结果表明,M-I2-TiO2在可见光区有显著的吸收,300℃热处理得到的样品比表面积高达227.6 m2/g,600℃热处理所得样品的比表面积仍高达111.8 m2/g,而400℃热处理所得样品具有最好的光催化降解性能.双介孔结构纳米TiO2/I2复合材料的光催化降解性能显著高于相同方法制备的纯TiO2和Degussa P-25商业产品.催化剂经6次重复使用其光催化活性基本保持不变.

关 键 词:  介孔  复合  光催化

Preparation and Visible Light Photocatalytic Activity of Bimodal Mesoporous TiO2/I2 Composite Nanomaterials
Xu Pu,Gao Shanmin,Xu Yanbin,Huang Baibiao,Dai Ying,Yu Zhongxi,Wang Yubao.Preparation and Visible Light Photocatalytic Activity of Bimodal Mesoporous TiO2/I2 Composite Nanomaterials[J].Acta Chimica Sinica,2010,68(9).
Authors:Xu Pu  Gao Shanmin  Xu Yanbin  Huang Baibiao  Dai Ying  Yu Zhongxi  Wang Yubao
Abstract:An accessible, template-free process to fabricate bimodal mesoporous TiO2/I2 composite nanocrystallites was developed by using tetrabutylorthotitanate TiO(C4H9)4, TBOT] and iodine hydrosol as precursor by hydrolysis precipitation method. The samples were characterized by XRD, TEM, BET,UV-Vis-DRS and FT-IR, respectively. The relation of the heat treatment temperatures and the photocatalysis activity of M-I2-TiO2 were also studied. The photocatalytic activity of samples was evaluated by degradation of methylene blue (MB) as target pollutant. The results show that the bimodal mesoporous structured M-I2-TiO2 exhibited stronger absorption in visible light region. The specific surface area of the bimodal mesoporous I2-doped TiO2 thermal treatment in air at 300 ℃ exceeded 227.6 m2/g, and that of the samples thermal treatment in air at 600 ℃ still have 111.8 m2/g, which indicated the samples have relative high thermal stability. The TiO2/I2 composite sample thermal treatment at 400 ℃ manifested the highest photocatalytic activity for photodecomposition of MB solution compared with thermal treatment at other temperatures, the uncomposite TiO2 and Degussa P-25 under the irradiation of visible-light. Little difference of the activity was observed between the samples used for 6 times.
Keywords:TiO2  TiO2  I2  mesoporous  composite  photocatalytic
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