摘要
以四氯化钛为钛源、无水乙醇为氧供体兼溶剂,通过引入催化剂碘化锂,采用非水解溶胶-凝胶法88℃低温制备了锐钛矿型纳米氧化钛。借助XRD、TEM和FT-IR等测试手段研究了催化剂对氧化钛低温形成的影响。结果发现:催化剂的引入促进了在溶胶非水解缩聚反应过程中Ti-O-Ti键合的形成,有利于在后续的回流工艺中Ti-O-Ti键合的过饱和析晶,这是非水解低温制备氧化钛的关键;制备的纳米氧化钛具有非常高的光催化活性,加入甲基橙溶液后就有明显的降解效果,光降解率达38.8%;紫外光照2h后的光降解率达76.8%。
Nanosized anatase titania has been prepared by non-hydrolytic sol-gel method at 88 ℃ by using titanium tetrachloride as titanium source,ethanol as oxygen donor and solvent,LiI as catalyst.The effects of the catalyst on the low temperature synthesis of nanosized titania has been studied by XRD,TEM and FT-IR.The results showed that：the introduction of the catalyst promotes the formation of Ti-O-Ti bond in the sol which is favorable to supersaturated crystallization of Ti-O-Ti bond.It is also the key to low temperature synthesis of titania.Meanwhile the photo catalytic degradation of methyl orange shows the titania has excellent photo catalytic activity,and the photodegradation rate reaches 38.8％ with the titania added to the methyl orange solution and 76.8％ under 2h ultraviolet irradiation.
出处
《陶瓷学报》
CAS
北大核心
2014年第1期17-21,共5页
Journal of Ceramics
基金
广东省部产学研结合项目(项目编号:2011A091000024)专项资金资助
关键词
氧化钛
非水解溶胶-凝胶法
乙醇
碘化锂
titanium dioxide
nonhydrolytic sol-gel method
ethanol
lithium iodide
