Preparation, Characterization and Photo-Catalytic Behavior of Y_2O_3/TiO_2 Composite Semiconductor Nanopowder

作     者：李芳柏 古国榜 李新军 万洪富 黄志尧 LI Fang-bai;GU Guo-bang;LI Xin-jun;WAN Hong-fu;HUANG Zhi-yao

作者机构：Guangdong Inst Ecoenvironm & Soil Sci Guangzhou 510650 Peoples R China S China Univ Technol Coll Chem Engn Guangzhou 510642 Peoples R China Chinese Acad Sci Guangzhou Inst Energy Convers Guangzhou 510070 Peoples R China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2001年第19卷第3期

页      面：187-191页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：GuangdongNaturalScienceFoundation ( 980 0 12 )andGuangdongKeyLaboratoryofAgro EnvironmentIntegratedControl 

主　　题：rare earths photo-catalysis titanium dioxide yttrium oxide composite semiconductor methylene blue 

摘      要：Y 2O 3/TiO 2 samples were prepared by sol-gel process and characterized by means of X-ray diffraction (XRD), laser Raman spectra (LRS), UV-visible diffuse reflectance spectra (DRS), specific surface area (BET), and transmission electron microscopy (TEM). The results show that the relative intensity of 101 peak of anatase and 002 peak of rutile, the mean crystal diameter and mean particle diameter of Y 2O 3/TiO 2 samples decrease while specific surface area increases owing to doping Y 2O 3. Y 2O 3/TiO 2 samples have a larger specific surface area and higher thermal stability. Owing to quantum size effect, the reflectance of Y 2O 3/TiO 2 samples is larger than that of pure TiO 2 in the range of 380～460 nm and the position of Raman peaks varies slightly. Being a model reaction, the photo-catalytic degradation of methylene blue (MB) with positive charge and methyl orange (MO) with negative charge was investigated in TiO 2 and Y 2O 3/TiO 2 nanopowder suspension irradiated by high-pressure mercury lamp. As a result, the addition of Y 2O 3 to TiO 2 is detrimental to photo-activity of TiO 2 for MB photo-degradation and photo-catalytic behavior is enhanced due to 5%, 10% Y 2O 3 deposited on TiO 2 for the photo-degradation of MO. And the relationship between photo-physical properties and photo-activity was discussed.