Abstract

Pickering emulsion were used as soft template for the preparation of two different kinds of graphene-based aerogels (graphene aerogels, named AGAs and graphene/polyvinyl alcohol (PVA) aerogels, named BGAs) in this work. The Pickering emulsions show good control effect on the pore sizes, density and porosity of the two kinds of graphene-based aerogels. The increase of the oil/water ratio in the emulsion can leads to increase of pore size and porosity and decrease of density of AGAs and BGAs. And the increase of agitation speed during the emulsion preparation leads to the decrease of the pore sizes of AGAs and BGAs, while shows slight influence on the porosity and density of the materials. Volume filling behavior was found when AGAs and BGAs adsorbing organics, so it is considered that high porosity and high open pore fraction in the aerogels will favor the adsorption capacity on organics.

摘要

在这项工作中，Pickering乳液用作软模板，用于制备两种不同类型的石墨烯气凝胶（石墨烯气凝胶，称为AGA和石墨烯/聚乙烯醇（PVA）气凝胶，称为BGA）。Pickering乳液对两种石墨烯基气凝胶的孔径，密度和孔隙率显示出良好的控制效果。乳液中油/水比的增加会导致孔径和孔隙率增加，以及AGA和BGA的密度降低。乳液制备过程中搅拌速度的提高导致AGA和BGA孔径的减小，而对材料的孔隙率和密度影响很小。当AGA和BGA吸附有机物时，发现了体积填充行为，