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      저자 : Jiefeng Meng (검색결과 2 건)
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        Hierarchical polyurethane/RGO/BiOI fiber composite as flexible, selfsupporting and recyclable photocatalysts for RhB degradation under visible light

        Meng Lan,Manli Wang,Nan Zheng,Xiaoli Dong,Yu Wang,Jiefeng Gao 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.108 No.-

        Increasing organic pollutants have seriously affected the ecological environment and human health, photocatalytictechnology is considered as one of the most effective and environmentally friendly treatmentmethods. In this work, a novel hierarchical polyurethane (PU)/reduced graphene oxide (RGO)/bismuthoxyiodide (BiOI) composite fiber photocatalyst is constructed via an energy-saving route consisted ofultrasonic-assisted and co-precipitation method by utilizing PU nanofibers as substrate. The RGO are firstevenly wrapped in the PU nanofiber surface and BiOI nanosheets are then uniformly grown on the PU/RGO surface to form the hierarchical PU/RGO/BiOI composite fibers with a core–shell structure. The composition,morphology and electrochemical performance of the obtained PU/RGO/BiOI were characterizedby XRD, XPS, SEM, BET, I-t and EIS. Benefited from the high specific surface area of the PU nanofiber andthe excellent electron transfer ability of the RGO, a remarkable photocatalytic activity was achieved forthe PU/RGO/BiOI composite fibers and the degradation rate of RhB is 93.2% within 180 min. Notably, comparedto the traditional suspended nanoparticles, the PU/RGO/BiOI fibers exhibit excellent flexibility andself-supporting property, and can be easily separated and recovered from the contaminated water. Thus,the obtained PU/RGO/BiOI composite fibers with high photocatalytic activity and easily separable propertyare expected to possess great potential in water purification.

      • KCI등재

        Z-scheme Bi2O3/Bi/ZnIn2S4 photocatalyst for enhancing the removal performance of Cr(VI), 2,4-dinitrophenol and tetracycline

        Jing Luo,Zhaoxia Shi,Jiefeng Meng,Feng Li,Taohai Li,Meng Zhang,Rossella Greco,Wei Cao 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.124 No.-

        Construction of heterojunctions is conventionally regarded as the prevailing technique to enhance solardrivenphotocatalytic water splitting and photodegradation of pollutants. Herein, we report a noveldesign of a ternary Bi2O3/Bi/ZnIn2S4 system, which was facilely synthesized to satisfy these stringent criteriafor sunlight photocatalytic removal of organic and ionic pollutants and hydrogen evolution. Bi2O3/Bi/ZnIn2S4 could degrade 2,4-dinitrophenol (94.6%), tetracycline (96.5%), and Cr6+ (96.3%) effectivelyunder visible light and give a hydrogen production rate of 482.5 lmolg1h1 under visible light. Based on first-principles calculations and electrochemical results, our system could be identified as aZ-scheme. Photocorrosion of the sulfide is prohibited while the catalytic capabilities are simultaneouslybenefited due to lowered bandgap in light harvesting, internal electric fields in charge separations, andsurface plasmonic resonance enhanced electron boost.

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