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Title: One-step in situ synthesis of graphene–TiO{sub 2} nanorod hybrid composites with enhanced photocatalytic activity

Abstract

Chemically bonded graphene/TiO{sub 2} nanorod hybrid composites with superior dispersity were synthesized by a one-step in situ hydrothermal method using graphene oxide (GO) and TiO{sub 2} (P25) as the starting materials. The as-prepared samples were characterized by XRD, XPS, TEM, FE-SEM, EDX, Raman, N{sub 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/TiO{sub 2} nanorod hybrid composite photocatalysts, as 3.7 times larger than that of pristine TiO{sub 2} nanorods. This work demonstrated that the synthesis of TiO{sub 2} 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/TiO{sub 2} nanorod hybrid composites with enhanced photocatalytic performance.

Authors:
; ; ; ; ;
Publication Date:
OSTI Identifier:
22420767
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 61; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ADSORPTION; CARBON OXIDES; CHEMICAL BONDS; COMPOSITE MATERIALS; GRAPHENE; HYDROTHERMAL SYNTHESIS; IRRADIATION; METHYLENE BLUE; NANOSTRUCTURES; PHOTOCATALYSIS; RED SHIFT; SCANNING ELECTRON MICROSCOPY; SPECTRAL REFLECTANCE; TITANIUM OXIDES; TRANSMISSION ELECTRON MICROSCOPY; ULTRAVIOLET RADIATION; VISIBLE RADIATION; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Sun, Mingxuan, E-mail: mingxuansun@sues.edu.cn, Li, Weibin, Sun, Shanfu, He, Jia, Zhang, Qiang, and Shi, Yuying. One-step in situ synthesis of graphene–TiO{sub 2} nanorod hybrid composites with enhanced photocatalytic activity. United States: N. p., 2015. Web. doi:10.1016/J.MATERRESBULL.2014.10.040.
Sun, Mingxuan, E-mail: mingxuansun@sues.edu.cn, Li, Weibin, Sun, Shanfu, He, Jia, Zhang, Qiang, & Shi, Yuying. One-step in situ synthesis of graphene–TiO{sub 2} nanorod hybrid composites with enhanced photocatalytic activity. United States. doi:10.1016/J.MATERRESBULL.2014.10.040.
Sun, Mingxuan, E-mail: mingxuansun@sues.edu.cn, Li, Weibin, Sun, Shanfu, He, Jia, Zhang, Qiang, and Shi, Yuying. Thu . "One-step in situ synthesis of graphene–TiO{sub 2} nanorod hybrid composites with enhanced photocatalytic activity". United States. doi:10.1016/J.MATERRESBULL.2014.10.040.
@article{osti_22420767,
title = {One-step in situ synthesis of graphene–TiO{sub 2} nanorod hybrid composites with enhanced photocatalytic activity},
author = {Sun, Mingxuan, E-mail: mingxuansun@sues.edu.cn and Li, Weibin and Sun, Shanfu and He, Jia and Zhang, Qiang and Shi, Yuying},
abstractNote = {Chemically bonded graphene/TiO{sub 2} nanorod hybrid composites with superior dispersity were synthesized by a one-step in situ hydrothermal method using graphene oxide (GO) and TiO{sub 2} (P25) as the starting materials. The as-prepared samples were characterized by XRD, XPS, TEM, FE-SEM, EDX, Raman, N{sub 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/TiO{sub 2} nanorod hybrid composite photocatalysts, as 3.7 times larger than that of pristine TiO{sub 2} nanorods. This work demonstrated that the synthesis of TiO{sub 2} 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/TiO{sub 2} nanorod hybrid composites with enhanced photocatalytic performance.},
doi = {10.1016/J.MATERRESBULL.2014.10.040},
journal = {Materials Research Bulletin},
number = ,
volume = 61,
place = {United States},
year = {Thu Jan 15 00:00:00 EST 2015},
month = {Thu Jan 15 00:00:00 EST 2015}
}