PEG辅助纳米TiO_2的可控制备及其光催化活性  

Controllable Synthesis of Nano-Sized TiO_2 with PEG and Its Photocatalytic Activity

作　　者：包南[1] 孙剑[1] 谢晴[2] 马志会[1] 

机构地区：[1]山东大学环境科学与工程学院,济南250100 [2]大连理工大学环境与生命学院,大连116024

出　　处：《传感技术学报》2006年第05B期2354-2358,共5页Chinese Journal of Sensors and Actuators

基　　金：国家高技术研究发展"863"计划课题资助(2003AA601060-01-04);山东大学校青年基金资助(11440053187025)

摘　　要：以不同浓度的聚乙二醇(PEG)为模板剂,采用一步水热法制备了一系列晶型和形貌可控的TiO2纳米粉体,并采用XRD、TEM、SEM、TG-DTA、IR及N2吸附-脱附等手段对样品进行了表征.结果表明,可以通过调节PEG浓度来控制对样品的形貌和晶相,且可形成具有介孔结构的纳米晶体,从而为TiO2纳米晶的可控制备提供了一个简便的方法.最佳模板剂浓度下合成的水热产物具有较高的比表面积(约279.5m2/g),在紫外光照1h后,对水中X-3B的降解率达到94.4%,比不加PEG时有较明显的增强.Nano-sized titanium dioxide powders with controllable morphology and crystallite phase were synthesized via a one-step hydrothermal process assisted by polyethylene glycol （PEG）. XRD, TEM, SEM, TG-DTA, IR and N2 adsorption-desorption isotherms were used to character different samples. The morphology and crystallite phase of nanoparticles can be controlled by concentration of PEG in this reaction system. The mesoporous structure of obtained nanoparticles was revealed by the adsorption and desorption isotherms and the pore size distribution curve. The optimum nanocrystals were of high BET surface area （279. 5 m^2/g）. Photocatalytic experiments under UV light demonstrated that the sample with PEG assisted exhibited better photocatalytic degradation effect （94.4%） of X-3B than TiO2 without PEG assisted done.

关 键 词：水热法 可控 聚乙二醇 二氧化钛 介孔 

分 类 号：TB383[一般工业技术—材料科学与工程]