▎ 摘　　要

NOVELTY - Preparation of functional group-modified mesoporous graphene composite involves acidifying graphite, dispersing acidified graphite and cetyltrimethylammonium bromide in water, adding base, ethyl orthosilicate, ethanol and alkylsilane, coating the resultant mesoporous silica material in inner wall of 1-18C hydrophobic chain and processing. USE - Preparation of functional group-modified mesoporous graphene composite used for detecting toxic substance in body fluid, liquid food (all claimed) and environmental sample. ADVANTAGE - The method efficiently provides functional group-modified mesoporous graphene composite having high specific surface area, by simple process. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for usage method of functional group-modified mesoporous graphene composite in detection of toxic substance in body fluid and liquid food.