▎ 摘　　要

NOVELTY - Preparing graphene oxide modified corn straw bio-char involves adding graphene oxide suspension followed by ultrasonic treatment to obtain dispersed single layer oxidized graphene suspension, adding carboxymethyl cellulose solution to obtain graphene oxide-cellulose suspension, adjusting the pH value of cellulose solution is 5-8, mixing corn straw powder at 100-180 degrees C, stirring for 2-5 hours, standing and aging for 3-4 hours, filtering and collecting precipitate, oxidizing precipitate into graphene modified carbon to obtain graphene oxide modified bio-char, washing with water, then performing vacuum drying to obtain graphene oxide modified primary biological carbon composite material in anaerobic environment to obtain graphene oxide modified bio-char primary, pyrolyzing for 1-4 hours at 100-400 degrees C under rising speed of temperature to pyrolysis temperature to 8-15 degrees C/minute, crushing and sieving pyrolysis product to obtain graphene oxide modified corn straw bio-char. USE - Method for preparing graphene oxide modified corn straw bio-char. ADVANTAGE - The method enables to prepare graphene oxide modified corn straw bio-char in eco-friendly manner.