Preparation of graphene-MoS2 hybrid aerogels as multifunctional sorbents for water remediation
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The increasing demand of clean water and effective way to recycle industrial wastewater has offered a new application for carbon-based three-dimensional (3D) porous networks as sorbents due to their superior sorption abilities. Through the surface modification and hybridization with functional materials, the physical and chemical properties of the 3D carbon-based materials can be engineered. In this work, graphene-MoS2 aerogels (GMAs) with bulky shape are synthesized via a one-pot hydrothermal method. The obtained GMAs show quick sorption rate and high sorption capacity towards a wide variety of contaminants. The sorption covers not only organic solvents or organic dyes, but also toxic heavy metals ions such as Hg2+ and Pb2+. More importantly, the sorption capacity towards metal ions can be optimized by simply changing the loading amount of MoS2.
KeywordsGraphene MoS2 aerogels multifunctional sorbents water remediation
三维碳基多孔材料因其独特的结掏和超高的吸附性能, 已成为最有水污染处理应用前景的吸附材料之一. 本文通过有效的调控, 合成了多种具有不同孔道结掏和成分组成的石墨烯-二硫化钼复合气凝胶材料. 这种材料在吸附重金属离子, 有机染料, 油及有机溶剂方面都有很多优异的表现. 通过调控二硫化钼的比例, 可以有效改善材料的吸附性能. 得益于此, 其吸附重金属汞离子的效率可以达到 1245mg g−1.
This work was supported by Ministry of Education (Singapore) under AcRF Tier 2 (ARC 19/15, MOE2014-T2-2-093, MOE2015-T2-2-057 and MOE2016-T2-2-103) and AcRF Tier 1 (2016-T1-001-147 and 2016-T1-002-051), NTU under Start-Up Grant (M4081296.070.500000), and NOL Fellowship Programme Research Grant in Singapore. This research grant is supported by the Singapore National Research Foundation under its Environmental & Water Technologies Strategic Research Programme and administered by the Environment & Water Industry Programme Office (EWI) of the PUB (project No.: 1301-IRIS-47). This research is supported by the National Research Foundation, Prime Minister’s Office, Singapore under its Campus for Research Excellence and Technological Enterprise (CREATE) programme. We would like to acknowledge the Facility for Analysis, Characterization, Testing and Simulation, Nanyang Technological University, Singapore, for use of their electron microscopy facilities.