▎ 摘　　要

NOVELTY - Graphene silkworm excrement carbon core-shell composite material comprises a three-dimensional pore structure having Langmuir specific surface area of 1100-1400 m2/g and total pore volume of 0.5-0.7 cm3/g. The microporous specific surface area and the pore volume accounts for the total surface area and pore volume to more than 80%. USE - The graphene silkworm excrement carbon core-shell composite material is useful in slow release pesticides (claimed). ADVANTAGE - The material has high absorption capacity and good slow-release effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing graphene silkworm sand carbon core-shell composite material, comprising: (i) mixing the silkworm excrement and water, swelling and freeze-drying, then subjecting to high-temperature carbonation reaction under protective gas to obtain carbonized silkworm excrement; (ii) mixing the carbonized silkworm excrement with potassium hydroxide, activating under protective gas, cleaning, centrifuging and drying to obtain high specific surface silkworm excrement based microporous carbon material; and (iii) mixing the silkworm excrement based microporous carbon material with graphene oxide aqueous solution, centrifuging, reacting in a plasma reactor under hydrogen atmosphere with plasma device input voltage of 20-30 V, modification time of 10-20 minutes, washing with water, then drying.