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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 mm to 20 mm. The macroporous PS/GO composite monolith exhibited high adsorption capacity for tetracycline(TC) in an aqueous solution at p H 4–6. The maximum adsorption capacity reached 197.9 mg g 1at p H 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.
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 mm to 20 mm. macroporous PS / GO composite monolith exhibited high adsorption capacity for tetracycline (TC) in an aqueous solution at p H 4-6. The maximum adsorption capacity reached 197.9 mg g 1 at p H 6. The adsorption behavior of TC fitted well with the Langmuir model This work offers a simple and efficient approach to fabricate macroporous GO-based monoliths with high strength and adhesion ability for organic pollutants ants.