Efficiency of different methods of oxidation of graphite: a key route of graphene preparation

Oxidation of graphite is the first important step for industrial-scale preparation graphene by a top-down method using as starting material. In this study, was oxidized thermal, chemical (sulphuric acid, ozone, peracetic benzoyl peroxide), thermo-chemical (heat treatment in presence sulphuric acid) and mechano-chemical (sonication with acid ozone environment) methods efficiency different oxidation studied through characterization techniques crystal simulation. From results, it evident that maximum percentage functional groups (1.8%) introduced without much breaking hexagonal graphitic structure when mixture peroxide (1:20 w/w) heated at 110 °C 15 min. However, defects generated introduction well sonicated (1:10 environment 80 The simulation result revealed virgin has monoclinic symmetry, but after BPO converted to triclinic symmetry significant increase unit-cell volume from 738.6 Ǻ3 1655.8 Ǻ3.