Sonochemical assisted synthesis of a novel TiO₂/graphene composite for solar energy conversion

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• 作者：YuLin Min^a ; ^b ; ^{ahaqmylin@yahoo.com.cn} ; Kan Zhang^c ; ^{zhangkan112255@hotmail.com} ; LiHua Chen^a ; ^b ; YouCun Chen^a ; ^b ; YuanGuang Zhang^a ; ^b
• 关键词：Sonochemical synthesis ; TiO2/graphene ; PEC activity ; Solar energy conversion
• 刊名：Synthetic Metals
• 出版年：2012
• 期刊代码：77_03796779
• 类别：ph
• 出版时间：June, 2012
• 卷：162
• 期：9-10
• 页码：827-833
• 文件大小：1444 K

摘要

In this paper, sonication as a common laboratory tool was used to drive chemical reaction between graphene oxide (GO) and titanium alkoxide. Firstly, we activated the GO using poly (acrylic acid) (PAA) in order to increase carboxylic groups on graphene surface. Secondly, a hydrolysis product of Ti(OH)_X from tetrabutyl titanate (TNB) were assembled on activated GO surface using sonochemical reaction (100 W, 50 Hz). After annealed at 400 掳C in Ar, a high quality TiO₂/graphene composite with great visible response were obtained, which was attributed to sonication improving GO sheets dispersion degree and accelerating chemical reaction resulted in partial formation of a TiC and TiOC bonds. The results of both the Rh.B degradation and photocurrent tests indicated that the photocatalytic and photoelectrochemical (PEC) activities of the TiO₂/graphene composite are much higher than those of commercial P25.