▎ 摘　　要

NOVELTY - Producing graphene comprises (a) providing a cellulose substrate containing sodium ions; and (b) forming graphene by irradiating a laser into the cellulose substrate. USE - The method is useful for producing graphene. ADVANTAGE - The method is economical aspects, and environmentally friendly, can be performed in atmospheric conditions without need to create separate environment i.e. inert conditions, and quickly and easily produces pattern through which electricity can flow. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for graphene containing sodium ions derived from cellulose.