WEDNESDAY 11:00
GRAPHENE OXIDE MULTILAYERS OBTAINED FROM BAMBOO: NOVEL SYNTHESIS METHOD, BASIC PROPERTIES AND FUTURE APPLICATIONS
Katherine Gross
Universidad del Valle, Colombia
ABSTRACT
In recent years, graphene oxide (GO) has received special interest in physics, chemistry, and materials science, among others, because of its unique and superior physicochemical properties. GO can be described as an oxidized form of graphene. The multifunctionality given by the oxides, in combination with the exceptional properties of graphene permit consider GO as a versatile candidate material for next-generation, electronics and optoelectronics, as well as in energy conversion and storage technologies. This talk presents a novel and cost-effective pyrolytic method to synthetize graphene oxide-based samples by using the Colombian bamboo (Guadua angustifolia Kunth) pyroligneous acid (BPA) as source. The morphological, structural, elemental, vibrational and magneto-electrical properties in our GO-BPA samples were investigated. High- resolution transmission electron microscopy and electron energy-loss spectroscopy have provided a complete structural and chemical description at the local scale in GO-BPA. In particular, temperature dependence on electrical conductivity shows typical semiconductor behavior, which could be described by the Mott 3D variable-range hopping mechanism. Estimations of band gap energy showed variation from 0.30 to 0.11 eV by decreasing oxygen content. These results confirm that GO-BPA offer future opportunities to obtain advanced functional materials by using an environmentally-sustainable and commercially feasible synthesis method from renewable natural resources.