纳米复合Y2O3/TiO2的制备、表征及其光催化性能研究

中国稀土学报, 2001, 19(3): 225-228.

纳米复合Y2O3/TiO2的制备、表征及其光催化性能研究

李芳柏 ^1, , 万洪富 ^2, , 黄志尧 ^3, , 古国榜 ^4, , 李新军 ^5,

1.广东省生态环境与土壤研究所，广东广州 510650

2.广东省生态环境与土壤研究所，广东广州 510650

3.广东省生态环境与土壤研究所，广东广州 510650

4.华南理工大学化工学院，广东广州 510642

5.华南理工大学化工学院，广东广州 510642

基金项目: 广东省重点实验室基金广东省环保科技研究开发基金(2000-06)

关键词：稀土 , 光催化 , 二氧化钛 , 三氧化二钇 , 复合半导体 , 亚甲基蓝

Preparation, Characterization and Photo-Catalytic Behavior of Y2O3/TiO2 Composite Semiconductor Nanopowder

采用溶胶-凝胶法制备复合半导体Y2O3/TiO2。掺入Y2O3会阻碍锐钛矿晶相的出现，掺入浓度越大，TiO2锐钛矿(101)峰强度减小越大、平均晶粒直径与颗粒直径减小、比表面积增大；Y2O3/TiO2具有高热稳定性与高比表面积，由于量子尺寸效应，掺入Y2O3使光催化剂的拉曼峰发生微小位移，在380～460nm范围内，使反射率增强。以亚甲基蓝与甲基橙溶液光催化降解为模型反应，掺入Y2O3，复合光催化剂对亚甲基蓝溶液的光催化脱色降解一级动力学常数明显低于纯TiO2的；掺入5%和10%Y2O3，复合光催化剂对甲基橙溶液的光催化脱色降解一级动力学均常数高于纯TiO2的，掺入浓度太高反而有害。讨论了掺入Y2O3后光物理性质的变化与其光催化活性的关系。

参考文献

[1]	Hoffmann M R;MARTIN S T;CHOI W Y et al.Environmental application of semiconductor photocatalysis[J].Chemical Reviews,1995,95:69-96.
[2]	D. Y. Goswami .A Review of Engineering Developments of Aqueous Phase Solar Photocatalytic Detoxification and Disinfection Processes[J].Journal of Solar Energy Engineering,1997(2):101-107.
[3]	SUN Feng-yu;WU Ming;LI Wen zhao et al.Relationship between optical surface properties and photocatalytic activity of titanium dioxide[J].催化学报,2002,19(02):121-124.
[4]	Bedja I;KAMAT P V .Capped semiconductor colloids: synthesis and photo-electrochemical behavior of TiO2-capped SnO2 nanocrystallites[J].Journal of Physical Chemistry,1995,99:9182-9188.
[5]	Engweiler J.;Baiker A.;Harf J. .WOX/TIO2 CATALYSTS PREPARED BY GRAFTING OF TUNGSTEN ALKOXIDES - MORPHOLOGICAL PROPERTIES AND CATALYTIC BEHAVIOR IN THE SELECTIVE REDUCTION OF NO BY NH3[J].Journal of Catalysis,1996(2):259-269.
[6]	WONG W K;MALATI M A .Doped TiO2 for solar energy applications[J].Solar Energy,1986,36:163-168.
[7]	XIANZHI FU;LOUIS A. CLARK;QING YANG;MARC A. ANDERSON .Enhanced Photocatalytic Performance of Titania-Based Binary Metal Oxides: TiO_2/SiO_2 and TiO_2/ZrO_2[J].Environmental Science & Technology: ES&T,1996(2):647-653.
[8]	Alemany LJ.;Ferlazzo N.;Forzatti P.;Busca G.;Giamello E. Bregani F.;Lietti L. .REACTIVITY AND PHYSICOCHEMICAL CHARACTERISATION OF V2O5-WO3/TIO2 DE-NOX CATALYSTS[J].Journal of Catalysis,1995(1):117-130.
[9]	LI Fang-bai;GU Guo-bang;LI Yong-jin .Enhanced rates of photocatalytic behavior using WO3/TiO2 coupled semiconductor nanopowder[J].Environmental Science(in Chin),1999,20:75-78.
[10]	LI Fang-bai .The preparation, characterization of modified titanium dioxide and its application of photo-catalytic degradation of dyes wastewater[D].Guangzhou:South China University of Technology,1999.

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