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Scalable Preparation of Graphene: Effect of Synthesis Methods on the Material Characteristics

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Synthesis of graphene with scalable characteristics, quality, and quantity has drawn much attention because of its massive potential application. Herein, we introduce a facile and scalable synthesis of graphene by directreduction and hydrothermal methods. The direct-reduction method involved the reduction of graphene oxide using ascorbic acid at 60 °C, whereas the hydrothermal method was performed using the same precursor under high pressure and at 160 °C. The effects of the synthesis pathways on the graphene characteristics and quality were investigated through Raman spectroscopy, scanning electron microscopy, transmission electron microscopy, and gas sensing measurements. Results demonstrated that the hydrothermal method was effective for the fabrication of graphene with scalable quantity. Gas-sensing characteristics of the high-quality synthesized graphene were tested against NO2 and Cl2 gases at different temperatures. The results demonstrated that the graphene sensors could detect the toxic oxidizing gases investigated with reasonable response and good response/recovery characteristics, suggesting a great potential application in air pollution monitoring.
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Document Type: Research Article

Publication date: 01 June 2015

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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