Synthesis of a sulfur-graphene composite as an enhanced metal-free photocatalyst

A novel metal-free photocatalyst--sulfur/graphene （S/GR） composite--has been synthesized using a facile one-pot, two-step hydrothermal method with thiosulfate and graphene oxide （GO） as precursors. A green reductant--L-ascorbic add--was used to transform GO to GR under mild conditions. The photocata...

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Bibliographic Details
Published inNano research Vol. 6; no. 4; pp. 286 - 292
Main Authors Peng, Wenchao, Li, Xiaoyan
Format Journal Article
LanguageEnglish
Published Heidelberg Tsinghua Press 01.04.2013
Tsinghua University Press
Subjects
Adsorption
Atomic/Molecular Structure and Spectra
Biomedicine
Biotechnology
Catalysis
Catalysts
Chemistry and Materials Science
Composite materials
Condensed Matter Physics
Diffraction
Fourier transforms
Graphene
Graphite
Infrared spectroscopy
Light
Materials Science
Metal oxides
Nanomaterials
Nanostructure
Nanotechnology
Photocatalysis
Quantum dots
Research Article
Scanning electron microscopy
Spectrum analysis
Sulfur
Synergistic effect
Transmission electron microscopy
X-ray diffraction
傅里叶变换红外光谱
光催化剂
增强型
复合材料
氧化石墨
水热法合成
硫代硫酸盐
金属
China
organic degradation
sulfur
metal-free catalyst
photocatalysis
methyl orange
graphene
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Summary:A novel metal-free photocatalyst--sulfur/graphene （S/GR） composite--has been synthesized using a facile one-pot, two-step hydrothermal method with thiosulfate and graphene oxide （GO） as precursors. A green reductant--L-ascorbic add--was used to transform GO to GR under mild conditions. The photocatalyst powders were characterized by Fourier transform infrared spectroscop, X-ray diffraction, transmission electron microscopy, scanning electron microscopy, and energy dispersive spectroscopy. Experimental tests were conducted on the photocatalytic decomposition of methyl orange （MO） by different catalysts. Compared to pure oL-S, the as-prepared S/GR composite showed much enhanced photocatalytic activity for the degradation of MO under both UV and solar light. The presence of GR also greatly increased the hydrophilicity and adsorption capacity of the catalyst material. The results indicate that the incorporation of GR with a-S results in a synergistic effect for the S-based photocatalysts offering more effective environmental applications.
Bibliography:metal-free catalyst,a-sulfur,graphene,photocatalysis,methyl orange,organic degradation
11-5974/O4
A novel metal-free photocatalyst--sulfur/graphene （S/GR） composite--has been synthesized using a facile one-pot, two-step hydrothermal method with thiosulfate and graphene oxide （GO） as precursors. A green reductant--L-ascorbic add--was used to transform GO to GR under mild conditions. The photocatalyst powders were characterized by Fourier transform infrared spectroscop, X-ray diffraction, transmission electron microscopy, scanning electron microscopy, and energy dispersive spectroscopy. Experimental tests were conducted on the photocatalytic decomposition of methyl orange （MO） by different catalysts. Compared to pure oL-S, the as-prepared S/GR composite showed much enhanced photocatalytic activity for the degradation of MO under both UV and solar light. The presence of GR also greatly increased the hydrophilicity and adsorption capacity of the catalyst material. The results indicate that the incorporation of GR with a-S results in a synergistic effect for the S-based photocatalysts offering more effective environmental applications.
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ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-013-0306-x