碱处理改性对TiO_2光催化及吸附性能的影响  

Effects of Alkali Treatment for Modification on Photocatalytic and Adsorption Performance of TiO_2

作　　者：李征然[1] 莫世清[1] 陈衍夏[1] 肖红艳[1] 施亦东[1] 

机构地区：[1]四川大学轻纺与食品学院,四川成都610065

出　　处：《皮革科学与工程》2011年第3期18-22,39,共6页Leather Science and Engineering

基　　金：国家科技支撑计划(2006BAC02A09)资助项目

摘　　要：研究了对纳米TiO2进行碱处理表面修饰改性的方法和工艺,通过改变其表面形貌和化学活性,改善其吸附分解能力,提高了对有机污染物的降解效果。碱处理后TiO2样品表面变得相对粗糙,比表面积从28.07 m2/g提高到了79.83 m2/g,平均孔径由10 nm下降到了4.135 nm;碘吸附值从35.6 mg/g增加到了102.79 mg/g,其吸附回线属于IUPAC吸附回线中的H1类型;对二氯甲烷的降解率均达到未处理试样的数倍。The methods and technology of surface modification of the TiO2 by using NaOH as the modification agent were analyzed.The capacity of adsorption and the effect of degradation on the organic pollutants were improved by changing the surface morphology and the chemical activities of the nano-TiO2.After modification,the specific surface area increased from 28.07 m2/g to 79.83 m2/g and the surface of the sample become larger more rough.While the average pore size of the nano-TiO2 decreased from 10nm to 4.135 nm,and its iodine adsorption values increased from 35.6 mg/g to 102.79 mg/g.The iodine adsorption loop of the TiO2 after modification showed that it was belong to the H1 type of IUPAC adsorption loop.The catalysising degradation rate of Dichloromethane（DCM） by the modification nano-TiO2 was increased several times than that of Dichloromethane（DCM） by the untreated.

关 键 词：纳米TIO2 碱处理 表面改性 吸附 光催化 

分 类 号：O643.36[理学—物理化学]