纳米复合Y2O3/TiO2的制备、表征及其光催化性能研究

被引：35

作者：

李芳柏

古国榜

李新军

万洪富

黄志尧

机构：

[1] 广东省生态环境与土壤研究所!广东广州

[2] 华南理工大学化工学院!广东广州

来源：

中国稀土学报 | 2001年 / 03期

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;

D O I：

暂无

中图分类号：

O643.3 [催化];

学科分类号：

081705 ;

摘要：

采用溶胶凝胶法制备复合半导体Y2 O3/TiO2 。掺入Y2 O3会阻碍锐钛矿晶相的出现 ,掺入浓度越大 ,TiO2 锐钛矿 (10 1)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 ;Y2 O3/TiO2 具有高热稳定性与高比表面积 ,由于量子尺寸效应 ,掺入Y2 O3使光催化剂的拉曼峰发生微小位移 ,在 3 80～ 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Y2 O3,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 %Y2 O3,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Y2 O3后光物理性质的变化与其光催化活性的关系

引用

页码：225 / 228

页数：4

共 10 条

[1]

Capped semiconductor colloids: synthesis and photo-electrochemical behavior of TiO2-capped SnO2 nanocrystallites. BEDJA I,KAMAT P V. The Journal of Physical Chemistry . 1995

[2]

Doped TiO2 for solar energy applications. WONG W K,MALATI M A. Solar Energy . 1986

[3]

Enhanced rates of photocatalytic behavior using WO3 /TiO2 coupled semiconductor nanopowder. LI Fang-bai,GU Guo-bang,LI Yong-jin. Environmental Science (in Chin. ) . 1999

[4]

WOx /TiO2 catalysts prepared by grafting of tungsten alkoxides: morphological properties and catalytic behavior in the selective reduction of NO by NH3. ENGWEILER J,HARF J,BAIKER A. Journal of Catalysis . 1996

[5]

Enhanced photocatalytic performance of titania-based binary metal oxides:TiO2 /SiO2 and TiO2 /ZrO2. FU Xian-zhi,LOUIS A C,YANG Qing,et al. Environmental Science and Technology . 1996

[6]

The preparation, characterization of modified titanium dioxide and its application of photo-catalytic degradation of dyes wastewater. LI Fang-bai. . 1999

[7]

Reactivity and physicochemical characterization of V2O5-WO3 /TiO2 de-NOx catalysts. ALEMANY L J,LIETTI L,FERLAZZO N,et al. Journal of Catalysis . 1995

[8]

A review of engineering developments of aqueous phase solar photocatalytic detoxification and disinfection processes. GOSWAMI D Y. Journal of Solar Energy Engineering Transactions of the ASME . 1997

[9]

Relationship between optical surface properties and photocatalytic activity of titanium dioxide. SUN Feng-yu,WU Ming,LI Wen-zhao,et al. Chinese Journal of Catalysis . 1998

[10]

Environmental application of semiconductor photocatalysis. HOFFMANN M R,MARTIN S T,CHOI W Y,et al. Chemical Reviews . 1995

← 1 →