钇施主掺杂二氧化钛的制备及对久效磷的降解  

Preparing way and photo-catalytic activity for monocrotophos of Y donor doped TiO_2

作　　者：邓昭平[1] 李思平[1] 陈建梨[1] 胡景川[1] 

机构地区：[1]成都理工大学材料与化学化工学院,四川成都610059

出　　处：《生态环境》2008年第4期1399-1402,共4页Ecology and Environmnet

基　　金：四川省应用科学基金项目(04JY029-008-2)

摘　　要：介绍一种用氧化二钇对TiO2进行施主掺杂来改善TiO2的光作用范围的方法，并研究用该方法制备的掺杂二氧化钛对久效磷的降解情况。钇离子以草酸盐化合物形式按比例掺杂到草酸氧钛酸中，经过结晶析出针状钇掺杂草酸氧钛酸晶体，再经过热分解和焙烧获得钇掺杂二氧化钛光催化剂粉体。钇掺杂二氧化钛光催化剂粉体中金红石矿型TiO2和锐钛矿型TiO2都分别控制为质最百分数45％和55％左右，粒度分布在0．2-0．5um范围，颗粒接近球形，掺钇杂量为质量百分数0．2％时光催化效果较佳，日光灯降解6h后，久效磷的无机磷回收率达到质量百分数96．4％。A method of expanding the light absorption range of TiO2 by the way of doping Y2O5 into TiO2 is introduced here, and the effect of the photo-catalytic degradation for Monocrotophos with the dopped TiO2 is also discussed. Ion y^5＋ in the solution of oxalate acid is doped into titanyl oxalate acid proportionally, and then, needle-like crystals come out, and finally, the powders of Y-doped TiO2 photo-catalytic degradation agent are obtained through heat decomposition and calcine. In the Y2O5 doped TiO2 photo-catalytic degradation agent, the contents ofrutile crystal and anatase crystal are controlled at about 45% and 55%, the distribution of granularity is from 0.2 to 0.5 ~m, the granules are nearly spherical. The effect of the photo-catalytic degradation for Monocrotophos is better when the content of doped Y2O3 is about 0.2%, on the condition of which, the inorganic phosphorous reception ratio from Monocrotophos is up to 96.4% through 6 hrs fluorescent lamp irradiation

关 键 词：二氧化钛 光催化降解 久效磷 掺杂二氧化钛 

分 类 号：X13[环境科学与工程—环境科学]