Fabrication of macroporous polystyrene/graphene oxide composite monolith and its adsorption property for tetracycline |
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| Authors: | Le-Chen Chen;Shan Lei;Mo-Zhen Wang;Jun Yang;Xue-Wu Ge; |
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| Institution: | a The USTC-Anhui Tobacco Joint Laboratory of Tobacco Chemistry, CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China;
b The USTC-Anhui Tobacco Joint Laboratory of Tobacco Chemistry, Research Center of Tobacco and Health, University of Science and Technology of China, Hefei 230052, China |
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| Abstract: | Macroporous polystyrene microsphere/graphene oxide (PS/GO) composite monolith was first prepared using Pickering emulsion droplets as the soft template. The Pickering emulsion was stabilized by PS/GO composite particles in-situ formed in an acidic water phase. With the evaporation of water and the oil phase (octane), the Pickering emulsion droplets agglomerated and combined with each other, forming a three-dimensional macroporous PS/GO composite matrix with excellent mechanical strength. The size of the macrospores ranged from 4 μm to 20 μm. The macroporous PS/GO composite monolith exhibited high adsorption capacity for tetracycline (TC) in an aqueous solution at pH 4-6. The maximum adsorption capacity reached 197.9 mg g-1 at pH 6. The adsorption behaviour of TC fitted well with the Langmuir model and pseudo-second-order kinetic model. This work offers a simple and efficient approach to fabricate macroporous GO-based monolith with high strength and adsorption ability for organic pollutants. |
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| Keywords: | Graphene oxide Polystyrene microsphere Macroporousm Adsorption Tetracycline |
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