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Mixed matrix membrane containing metal oxide nanosheets for efficient CO_(2)separation

Green Chemical Engineering 2021年第1期2卷 132-143页

作者： Weifang Zhu Fu Liu Minmin Gou Ruili Guo Xueqin Li School of Chemistry and Chemical Engineering Key Laboratory for Green Process of Chemical Engineering of Xinjiang BingtuanShihezi UniversityXinjiangShihezi832003China

The two-dimensional(2D)nanosheet zinc cobaltate(ZnCo_(2)O_(4))was added into polyether block amide(Pebax)matrix to prepare mixing matrix membrane(MMM)for separating carbon dioxide(CO_(2))/methane(CH4)gas *** 2D porous ZnCo_(2)O_(4)nanosheets were composed of chemically interconnected metal oxide *** ZnCo_(2)O_(4)nanoparticles in the nanosheets constructed large-quantity pores of 11.78 nm and provided abundant transfer channels for gas ***,the synergistic effect of bimetallic Zn^(2+)and Co^(2+)would promote the generation of oxygen vacancies(Oδ-),which could provide more CO_(2)(Cδ+)adsorption sites,thereby increased the selectivity of the *** large aspect ratio of the ultra-thin ZnCo_(2)O_(4)nanosheets showed better dispersion in the *** pure gas separation performance data showed the CO_(2)permeability and CO_(2)/CH4 selectivity of Pebax/ZnCo_(2)O_(4)membrane were 139.10 Barrer and 15.38,respectively,when the filling amount was 0.5 wt%.Compared with pure Pebax membrane,the separation performance(permeability and selectivity)were increased with 165.67%and 75.57%,respectively.

关键词： CO_(2)separation ZnCo_(2)O_(4)nanosheets The mixed matrix membranes Synergistic effect bimetallic oxide

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Co-Fe quantum dots coupled with ultrathin g-C_(3)N_(4) nanosheets as efficient and stable photo-Fenton catalysts

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Rare Metals 2023年第6期42卷 1877-1887页

作者： Jia-Yu Li Xin-Yu Wang Jian Tian Xiao-Li Zhang Feng Shi School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao266590China School of Materials Science and Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan250353China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450001China

The Fenton reaction has been widely used in the environmental ***,the sharp decline of photo-Fenton catalysts activity under neutral conditions is still an urgent problem to be *** study reports a Co/Fe bimetallic oxide quantum dots-coupled g-C_(3)N_(4)nanosheets(CoFeO QDs/g-C_(3)N_(4) NSs) composites with efficient degradation of organic pollutants under neutral *** the photo-Fenton condition,rhodamine B(RhB) degradation efficiency reached 98.32% within 90min for CoFeO QDs/g-C_(3)N_(4) NSs *** formed heterojunction between CoFeO QDs and g-C_(3)N_(4) NSs achieves enhanced charge transfer and efficient charge ***-Fe bimetals make g-C_(3)N_(4) NSs easier to excite the production of·OH by H_(2)O_(2),achieving excellent degradation efficiency and cycle stability for organic pollutants in a wide pH ***,CoFeO QDs/g-C_(3)N_(4)NSs composites can be used as efficient and stable photoFenton catalysts to degrade organic contaminants in practical applications.

关键词： bimetallic oxide Quantum dots(QDs) gC_(3)N_(4) Wastewater treatment Photo-Fenton

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