Authors: Jianliang Xiao Weiyang Lv Zhou Xie Yihu Song Qiang Zheng
Publish Date: 2017/01/20
Volume: 52, Issue: 10, Pages: 5807-5821
Abstract
It is a challenge to develop broadspectrum highefficiency easyrecyclable adsorbents for the removal of water contaminants Herein lcysteinereduced graphene oxide/polyvinyl alcohol CRG/PVA ultralight aerogels with good mechanical strength and reusability are prepared via a direct sol–aerogel transition strategy by freeze drying At optimized composition the aerogel shows high adsorption efficiency toward both cationic and anionic dyes overcoming the defect of many traditional adsorbents that usually can only remove one type of organic dyes The adsorption is proved to involve in π–π interaction between CRG and dyes endowing the aerogel with universality in adsorbing a wide range of conjugated dyes Moreover a remarkable synergetic effect is observed for removal of two oppositely charged dyes from aqueous system yielding exceptionally high total adsorption capacities surpassing all known adsorbents examined for removing binary dyes Thus the CRG/PVA aerogel demonstrates great potential for usage as reusable highefficiency and broadspectrum adsorbent in water treatmentThis work was supported by the National Natural Science Foundation of Zhejiang Province Grant No R14E030003 the National Natural Science Foundation of China Grant Nos 51573157 51333004 and 51373149 and the Major Projects of Science and Technology Plan of Guizhou Province Grant No 2013 6016
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