A Process for Preparing High Graphene Sheet Content Carbon Materials from Biochar Materials

Abstract

Graphene is monolayer graphite and has higher electron mobility than silicon, high heat conduction, and special optical properties. In this study, we have attempted to use a two-step process an acid pretreatment followed by a heat treatment for producing high graphene sheet content > % carbon materials GSCCMs from monocotyledonous and dicotyledonous biochar materials prepared at °C. The highest graphene sheet content of . % is found with the CH COOH pretreatment followed by a °C heat treatment of monocotyledonous biochar materials, and its conductivity was measured at . S/cm. Therefore, preparing GSCCMs from biochar materials could highly reduce the cost.

Biobased Functional Carbon Materials: Production, Characterization, and Applications—A Review

“…The crystalline structure of activated carbons is an important property that directly influences other properties; it is also relevant for other applications. One example is electrical conductivity, which is essential in energy storage systems or fuel cells [ 76 ]. Rosalind E. Franklin stated in her work that precursors with a very high oxygen content lead to non-graphitizable carbons, which is the case of biomass.…”

“…However, this occurs only within the basal plane since the graphene layers are stalked together due to van der Waals forces, which explains the anisotropic character of graphite. Bio-based microporous materials possess microcrystallites of graphene sheets; however, the graphene sheets are randomly oriented (turbostratic) and their content and size depend on the production process [ 76 , 96 ].…”

NanoRefinery of carbonaceous nanomaterials: Complementing dairy manure gasification and their applications in cellular imaging and heavy metal sensing

“…Liou and Huang developed a two-step method to produce high graphene sheet content carbon materials from Elaeis guineensis and Cryptomeria japonica biochars. To produce 84% yield graphene materials, the biochars were pre-treated with acetic acid for 14 days followed by a 1500 °C heat treatment (Liou and Huang, 2015). Zhu et al introduced the production of 3D graphene by incorporating hierarchical porous carbon.…”

Preliminary Investigation of Possible Biochar Use as Carbon Source in Polyacrylonitrile Electrospun Fiber Production

“…Nowadays, biochar has well-documented applications, such as geopolymers additivation [2], insulation materials production [3], water remediation [4,5], and soil amendment [6,7]. Biomass-derived char is also gaining interest in high-tech carbon-based materials, i.e., using biochar as a graphene precursor [8,9] or blending graphene and biochar to produce new materials [10].…”