Spongy Graphene as a Highly Efficient and Recyclable Sorbent for Oils and Organic Solvents
Hengchang Bi(Southeast University), Xiao Xie(Southeast University), Kuibo Yin(Southeast University), Yilong Zhou(Southeast University), Shu Wan(Southeast University), Longbing He(Southeast University), Feng Xu(Southeast University), Florian Banhart(Centre National de la Recherche Scientifique), Litao Sun(Southeast University), Rodney S. Ruoff(Southeast University)
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Abstract
Abstract In this work, spongy graphene (SG), a shape‐mouldable and nanoporous material with a high specific surface area used as a versatile and recyclable sorbent material, is proposed and studied. SG shows highly efficient absorption of not only petroleum products and fats, but also toxic solvents such as toluene and chloroform (up to 86 times of its own weight), requiring no further pretreatment, which is tens of times higher than that of conventional absorbers. Moreover, SG can be regenerated (>10 times) by heat treatment, yielding the full release of adsorbates (>99%). The present work suggests SG a widespread potential for applications in industry as well as topics regarding environmental protection.