▎ 摘　　要

Herein an overview of the graphene preparation from waste and bio-precursors is given which is simple yet adaptable approach excluding usual hydrocarbon or graphite as graphene precursor. Recently precursors such as paper cups, glucose, hemp, rice husk, cockroach legs, cookies, and grass has been identified for graphene production. We believe this review facilitates researchers in the better use of biomass and other waste as precursor material and so it can expectantly paves the way for the exploration of untouched biomass and other waste for graphene preparation. (C) 2017 Elsevier Ltd. All rights reserved.