One-step in situ synthesis of graphene-TiO2 nanorod hybrid composites with enhanced photocatalytic activity

被引：28
作者：
Sun, Mingxuan [1 ]
Li, Weibin [1 ]
Sun, Shanfu [1 ]
He, Jia [1 ]
Zhang, Qiang [1 ]
Shi, Yuying [1 ]
机构：
[1] Shanghai Univ Engn Sci, Sch Mat Engn, Shanghai 201620, Peoples R China
来源：
MATERIALS RESEARCH BULLETIN | 2015年 / 61卷
关键词：
Composites; Nanostructures; Chemical synthesis; Catalytic properties; SOLVOTHERMAL SYNTHESIS; TIO2; OXIDE; NANOCOMPOSITES; ARRAYS; CARBON; NANOPARTICLES; REDUCTION; SHEETS; GROWTH;
D O I：
10.1016/j.materresbull.2014.10.040
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Chemically bonded graphene/TiO2 nanorod hybrid composites with superior dispersity were synthesized by a one-step in situ hydrothermal method using graphene oxide (GO) and TiO2 (P25) as the starting materials. The as-prepared samples were characterized by XRD, XPS, TEM, FE-SEM, EDX, Raman, N-2 adsorption, and UV-vis DRS techniques. Enhanced light absorption and a red shift of absorption edge were observed for the composites in the ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS). Their effective photocatalytic activity was evaluated by the photodegradation of methylene blue under visible light irradiation. An enhancement of photocatalytic performance was observed over graphene/TiO2 nanorod hybrid composite photocatalysts, as 3.7 times larger than that of pristine TiO2 nanorods. This work demonstrated that the synthesis of TiO2 nanorods and simultaneous conversion of GO to graphene "without using reducing agents" had shown to be a rapid, direct and clean approach to fabricate chemically bonded graphene/TiO2 nanorod hybrid composites with enhanced photocatalytic performance. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：280 / 286
页数：7
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