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weak-reduction graphene oxide membrane for improving water purification performance

Journal of Materials Science & Technology 2020年第4期39卷 106-112页

作者： Hao Yu Yi He Guoqing Xiao Yi Fan Jing Ma Yixuan Gao Ruitong Hou Jingyu Chen State Key Laboratory of Oil&Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500China College of Chemistry and Chemical Engineering Southwest Petroleum UniversityChengdu610500China Chengdu Graphene Application Institute of Industrial Technology Chengdu611130China Deakin University Institute for Frontier MaterialsVIC 3220Australia

Two-dimensional(2 D) materials are promising candidates for advanced water purification *** this work, UV reduced GO(Ur GO) membranes on the support of polyvinylidene fluoride(PVDF) had been fabricated for wastewater treatment. The reduction degree of GO membrane on the effect of water purification performance was investigated, and it was found that the weak-reduction GO membrane exhibited the optimal performance of removing pollutant from wastewater than GO membrane. Besides,scanning electron microscopy, X-ray photoelectron spectroscopy, Raman spectra and contact angle tests were used to characterize the physical and chemical properties of the Ur GO membranes, and the permeance and rejection ability of the as-prepared filtration membranes were determined. Due to the weak-reduction of GO, pristine graphitic sp2 domains increased with slightly decreasing D-spacing. Thus,the Ur GO membrane showed a higher water flux of 38.27 L m-2h-1 bar-1, which was improved more than 270% compared to GO membrane, and dyes rejection increased. Those outstanding performances indicated that the Ur GO membrane could effectively regulate the contradiction of the trade-off balance between flux and rejection, and hold great potential in real-world waste-water purification.

关键词： Graphene oxide Membrane UV irradiation weak-reduction Purification

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