高效吸油石墨烯气凝胶的制备及其吸附性能OA

Graphene aerogel,with its advantages of low density,high porosity,and a substantial specific surface area,holds promise for diverse applications in oil absorption.In this study,we employ ethylenediamine chemical grafting and a hydrothermal technique to synthesize graphene aerogel.To further refine its structure,carbon nanotubes(CNTs)are grown within the aerogel matrix using chemical vapor deposition.Subsequently,an octadecylamine surface treatment is applied further to enhance the oil absorption capacity of the material.We conduct a comprehensive investigation of the chemical composition,micromorphology,phase composition,and oil absorption properties of the prepared graphene aerogel material.The results reveal that the formability of the graphene aerogel is significantly influenced by the concentration of graphene oxide and the amount of ethylenediamine.Moreover,following structural optimization and surface modification,the oil absorption capability of the graphene aerogel increases dramatically.The modified three-dimensional graphene aerogel exhibits exceptional oil absorption capacity,with an adsorption capacity of up to 98.2 g·g-1 and an adsorption flux of 9.98×104 L·m-2·h-1.The technological insights obtained from this work will serve as a valuable reference for developing high-performance 3D graphene oil-absorbing materials.The results of this study offer a promising technical foundation for advancements in this field.