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, CH 4 and H 2 being 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 CH 4 /H 2 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 CH 4 /H 2 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.
En el presente trabajo se presenta un ejemplo para la aplicación de las estrategias de simulación, haciendo uso de un simulador profesional. Se explica la concepción del ejercicio a desarrollar por el colectivo de estudiantes y se ejemplifican los resultados. El ejemplo desarrollado permite la aplicación de los elementos de simulación a la vez que los alumnos ejercitan habilidades como la búsqueda de información para el autoaprendizaje, la aplicación de las consideraciones para el cuidado del medio ambiente que se exigen en los procesos de generación de energía, el trabajo en equipo, la modelación de los resultados, y otros.
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