LIAO Qili 1, JIANG Weihui 2, FENG Guo 2, PENG Yongfeng 3
(1. Foshan Huaxia Building Ceramic R & D Center Co., Ltd., Foshan 528061, Guangdong, China; 2. Jingdezhen Ceramic Institute, Jingdezhen 333001, Jiangxi, China; 3. Zschimmer-Schwarz Chemical (Foshan) Co., Ltd., Foshan 528000, Guangdong, China)
Abstract：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.
Key words: titanium dioxide; nonhydrolytic sol–gel method; ethanol; lithium iodide