4.6 Article

Preparation of magnetic porous graphene oxide by intercalating rigid molecule and subsequent magnetization for enhancing pharmaceuticals removal from water

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MATERIALS TODAY COMMUNICATIONS
卷 34, 期 -, 页码 -

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ELSEVIER
DOI: 10.1016/j.mtcomm.2022.105119

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Pharmaceuticals; Graphene oxide; Adsorption; Mechanism; Adsorption capacity

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A novel magnetic porous graphene oxide (GO-DFe) was prepared by growing Fe3O4 via an impregnation method in the nanoscale channel of porous GO (GO-DFP), which was fabricated by chemically intercalating 4,4 '-Diaminooctafluorodiphenyl (DFP) into the GO sheets. The effects of solution pH, ions (Cland NO3- ) and co-existed matters in effluent of municipal wastewater on the adsorption behavior of SD and CBZ on GO-DFe5 were further clarified. Additionally, the cyclic reuse performance of GO-DFe5 for SD and CBZ were also evaluated, and the potential adsorption mechanism was proposed by theoretical calculation. The as-prepared GO-DFe5 adsorbent exhibited high adsorption capacities for SD (380.67 mu mol/g) and CBZ (350.70 mu mol/g).
A novel magnetic porous graphene oxide (GO-DFe) was prepared by growing Fe3O4 via an impregnation method in the nanoscale channel of porous GO (GO-DFP), which was fabricated by chemically intercalating 4,4 '-Diaminooctafluorodiphenyl (DFP) into the GO sheets. In this study, the concentrations of Fe2+/Fe3+ was optimized to obtain the GO-DFe5 adsorbent with good adsorption and separation performance. The adsorption performance of magnetic GO-DFe5 towards sulfadiazine (SD) and carbamazepine (CBZ) was evaluated, and adsorption kinetic models (the first-order, the second-order, Elovich and intra-particle models) and isotherm models (Langmuir and Freundlich models) were applied to study the adsorption rate and capacity. The effects of solution pH, ions (Cland NO3- ) and co-existed matters in effluent of municipal wastewater on the adsorption behavior of SD and CBZ on GO-DFe5 were further clarified. Additionally, the cyclic reuse performance of GO-DFe5 for SD and CBZ were also evaluated, and the potential adsorption mechanism was proposed by theoretical calculation. The asprepared GO-DFe5 adsorbent exhibited high adsorption capacities for SD (380.67 mu mol/g) and CBZ (350.70 mu mol/g). The adsorption amounts of GO-DFe5 for two pharmaceuticals about were 3.0 and 2.1 times higher than that of GO according to the second-order model. pi-pi interaction, hydrogen bonding and electrostatic interaction were involved in the adsorption of SD and CBZ on GO-DFe5. GO-DFe5 in water can be easily recovered by a magnet and exhibited a well reuse performance for SD and CBZ within 6 cycles.

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