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oapen-20.500.12657-491612021-11-23T14:03:11Z Chapter Optimization of the Synthesis Procedures of Graphene and Graphite Oxide Luis Valverde Palomino, José Romero Izquierdo, Amaya Sánchez Silva, MaríaLuz del Prado Lavín López, María graphene, graphite oxide, CVD, Improved Hummers method, thickness value bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues::TBN Nanotechnology The optimization of both the chemical vapor deposition (CVD) synthesis method to prepare graphene and the Improved Hummers method to prepare graphite oxide is reported. Copper and nickel were used as catalysts in the CVD-graphene synthesis, CH4 and H2being used as precursor gases. Synthesis variables were optimized according to a thickness value, calculated using a homemade Excel-VBA application. In the case of copper, the maximum thickness value was obtained for those samples synthesized at 1050°C, a CH4/H2 flow rate ratio of 0.07 v/v, a total flow of 60 Nml/min, and a time on stream of 10 min. In the case of nickel, a reaction temperature of 980°C, a CH4/H2 flow rate ratio of 0.07 v/v, a total flow of 80 Nml/min, and a time on stream of 1 min were required to obtain a high thickness value. On the other hand, the Improved Hummers method used in the synthesis of graphite oxide was optimized. The resultant product was similar to that reported in literature in terms of quality and characteristics but both time and cost of the synthesis procedure were considerably decreased. 2021-06-02T10:08:06Z 2021-06-02T10:08:06Z 2016 chapter ONIX_20210602_10.5772/63752_275 https://library.oapen.org/handle/20.500.12657/49161 eng application/pdf n/a 51090.pdf InTechOpen 10.5772/63752 10.5772/63752 09f6769d-48ed-467d-b150-4cf2680656a1 H2020-NMP-PILOTS-2014 646397 open access
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The optimization of both the chemical vapor deposition (CVD) synthesis method to prepare graphene and the Improved Hummers method to prepare graphite oxide is reported. Copper and nickel were used as catalysts in the CVD-graphene synthesis, CH4 and H2being used as precursor gases. Synthesis variables were optimized according to a thickness value, calculated using a homemade Excel-VBA application. In the case of copper, the maximum thickness value was obtained for those samples synthesized at 1050°C, a CH4/H2 flow rate ratio of 0.07 v/v, a total flow of 60 Nml/min, and a time on stream of 10 min. In the case of nickel, a reaction temperature of 980°C, a CH4/H2 flow rate ratio of 0.07 v/v, a total flow of 80 Nml/min, and a time on stream of 1 min were required to obtain a high thickness value. On the other hand, the Improved Hummers method used in the synthesis of graphite oxide was optimized. The resultant product was similar to that reported in literature in terms of quality and characteristics but both time and cost of the synthesis procedure were considerably decreased.
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