| Literature DB >> 21482166 |
Jingjing Guo1, Shenmin Zhu, Zhixin Chen, Yao Li, Ziyong Yu, Qinglei Liu, Jingbo Li, Chuanliang Feng, Di Zhang.
Abstract
Using ultrasonication we succeed in a controlled incorporation of TiO(2) nanoparticles on the graphene layers homogeneously in a few hours. The average size of the TiO(2) nanoparticles was controlled at around 4-5 nm on the sheets without using any surfactant, which is attributed to the pyrolysis and condensation of the dissolved TiCl(4) into TiO(2) by ultrasonic waves. The photocatalytic activity of the resultant graphene-TiO(2) composites containing 25 wt.% TiO(2) is better than that of commercial pure TiO(2). This is partly due to the extremely small size of the TiO(2) nanoparticles and partly due to the graphene-TiO(2) composite structure consisting of homogeneous dispersion of crystalline TiO(2) nanoparticles on the graphene sheets. As the graphene in the composites has a very good contact with the TiO(2) nanoparticles it enhances the photo-electron conversion of TiO(2) by reducing the recombination of photo-generated electron-hole pairs.Entities:
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Year: 2011 PMID： 21482166 DOI： 10.1016/j.ultsonch.2011.03.021
Source DB: PubMed Journal: Ultrason Sonochem ISSN： 1350-4177 Impact factor: 7.491