▎ 摘　　要

NOVELTY - A porous graphene-silver nano-diamond composite material comprises a porous graphene and a silver nano-square block, where the pores of the porous graphene micro-pore diameter is 3-50 mu m, the one side of the porous graphene is connected with a silver nano-diamond with hole wall adsorption and the side length of the silver nano-square block is 60-80 nm. USE - Porous graphene-silver nano-diamond composite material for use as active substrate of laser raman spectrometer meter that is utilized for measuring chemical components of pesticide, such as thiram, ferric dimethyldithiocarbamate or ziram (claimed). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing a porous graphene-silver nano-diamond composite material.