One-step hydrothermal synthesis of anatase TiO₂/reduced graphene oxide nanocomposites with enhanced photocatalytic activity

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• 作者：Dayu Liang ; Can Cui ; Haihua Hu ; Yaping Wang ; Sheng Xu ; Beili Ying ; Peigang Li ; Bingqing Lu ; Honglei Shen
• 关键词：TiO2 ; Reduced graphene oxide ; Hydrothermal ; Photocatalysis
• 刊名：Journal of Alloys and Compounds
• 出版年：2014
• 出版时间：5 January, 2014
• 年：2014
• 卷：582
• 期：Complete
• 页码：236-240
• 全文大小：1852 K

文摘

A facile and efficient one-step hydrothermal approach has been developed to synthesize chemically bonded TiO₂/reduced graphene oxide (RGO) nanocomposites with Ti(SO₄)₂ and graphene oxide (GO) as precursors and ethanol/water solvent as a reducing agent. This approach aims to realize a partial reduction of GO and a growth of anatase TiO₂ nanoparticles on RGO sheets simultaneously. The morphology and microstructure characterizations of TiO₂/RGO nanocomposites reveal that this method leads to close interfacial contact of TiO₂/RGO and efficient dispersion of TiO₂ nanocrystals on the surface of RGO sheets. The TiO₂/RGO nanocomposites exhibit superior photocatalytic activity compared to bare TiO₂ nanoparticles and a mechanical mixing TiO₂ + RGO sample in the degradation of Rhodamine B. Based on the photoluminescence spectrum and photocurrent response measurements, the enhanced photocatalytic activity of TiO₂/RGO is mainly attributed to the excellent electron trapping and transportation properties of RGO.