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超亲水纳孔分离膜的制备及其分子分离性能和稳定性研究

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Science China materials 2024年第8期67卷 2477-2485页

作者：赵璐张丰高守建靳健 College of Chemistry Chemical Engineering and Materials ScienceCollaborative Innovation Center of Suzhou Nano Science and TechnologySuzhou Key Laboratory of Macromolecular Design and Precision SynthesisJiangsu Key Laboratory of Advanced Negative Carbon TechnologiesSoochow UniversitySuzhou 215123China i-Lab CAS Key Laboratory of Nano-Bio InterfaceSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China

膜分离技术在有机分子污水的处理中具有广泛应用,其面临的难题之一是制备具有超亲水性质的纳孔膜以抵御有机污染物的污染,实现高效、稳定的分子分离.在本文中,我们通过全膜交联的方法在保持水凝胶纳孔膜超亲水性质的前提下大幅提升了其... 详细信息

膜分离技术在有机分子污水的处理中具有广泛应用,其面临的难题之一是制备具有超亲水性质的纳孔膜以抵御有机污染物的污染,实现高效、稳定的分子分离.在本文中,我们通过全膜交联的方法在保持水凝胶纳孔膜超亲水性质的前提下大幅提升了其机械强度,制备了高强度超亲水纳孔膜.该膜实现了有机分子的高效分离,水通量达到220 L m^(-2)h^(-1)bar^(-1),考马斯亮蓝(CBB)截留率达到~99.9%,分子/盐(CBB/Na_(2)SO_(4))选择性达到747.在以腐殖酸为污染物的分子分离中,该膜表现出优异的抗污染性能,通量恢复率接近100%.该膜还具有出色的抗压性能,在高达8 bar的跨膜压力下保持了稳定的分子分离性能.本工作为制备超亲水纳孔膜实现有机分子废水的高效分离提供了一种新的思路.

关键词：超亲水跨膜压力抗污染性能分离性能膜分离技术高效分离抗压性能孔膜

Fabrication of Porous N-Gan/Cuxzn1-Xs Heterojunctions for Ultraviolet Photodetector Application

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SSRN 2025年

作者： Jia, KaiDa Jia, Wei Lia, TianBao Zhai, GuangMei Ren, HengLei Dong, HaiLiang Dong, PengQi Xu, BingShe Key Laboratory of Interface Science and Engineering in Advanced Materials Taiyuan University of Technology Taiyuan030024 China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan030000 China Institute of Atomic and Molecular Science Shanxi University of Science and Technology Xi’an710021 China The Institute of Architectural Design and Research of Taiyuan University of Technology Co. Ltd Taiyuan030024 China

Porous n-GaN/CuxZn1-xS UV Photodetectors fabricated by a heterojunction between porous n-GaN and CuxZn1-xS films were prepared by thermal annealing and chemical bath deposition. By adjusting the ratio of Cu and Zn in the CuxZn1-xS films, with x defined as Cu (mol%)/(Cu+Zn) (mol%),distinct transparency, conductivity, and energy banding properties are achieved, which thereby significantly influences the optoelectronic performance of the UV PDs. The findings of the study demonstrated that the devices exhibit excellent rectification characteristics and repeatable photocurrent responses. When the value of x is 0.4, in particular, exhibits pronounced performances working under a ultraviolet light of 43.5 μW/cm2 at 0 V, including high on/off ratio (~5.27×104), remarkable responsivity (0. 574 A/W), ultrahigh specific detectivity (8.75×1014 Jones), high external quantum efficiency (195.02%) and fast response speed (0.09/36 ms). This study provides theoretical insights and experimental evidence to facilitate the development of next-generation optoelectronic devices utilizing CuxZn1-xS /GaN heterojunctions. © 2025, The Authors. All rights reserved.

关键词： Gallium nitride

Core-Shell Metal-Organic Frameworks with Tunable Shell Structure as Stationary Phase for High Performance Liquid Chromatography

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SSRN 2023年

作者： Wang, Jiafei He, Yuqing Wan, Xiang Xie, Fazhi Sun, Yuanshe Li, Tong Xu, Qin Zhao, Donglin Qu, Qishu Key Laboratory of Functional Molecule Design and Interface Process Anhui Province Engineering Laboratory of Advanced Building Materials School of Materials and Chemical Engineering Anhui Jianzhu University Hefei230601 China Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical Engineering Hefei University of Technology Hefei230009 China Dalian Elite Analytical Instruments Co. Ltd. Dalian116023 China College of Chemistry and Chemical Engineering Yangzhou University Yangzhou225002 China

Composite SSU spheres were prepared by coating SiO2 core-shell spheres (SiO2@dSiO2) with a metal-organic framework UiO-66. By controlling the concentration of Zr4+, the obtained SSU spheres have two different morphologies: layer-on-sphere and spheres-on-sphere. The structure of the layer-on-sphere is the surface of SiO2@dSiO2 covered with a layer of UiO-66 nanocrystals. SSU with this structure has only a characteristic pore size of about 1 nm belonging to UiO-66 and is therefore not suitable as a packed stationary phase for high performance liquid chromatography. The spheres-in-sphere structure of SSU has a 45 nm mesopores formed by the accumulation of UiO-66 nanocrystals on the surface of SiO2@dSiO2 in addition to the characteristic micropores of UiO-66 of about 1 nm. Moreover, SiO2@dSiO2 was coated with UiO-66 both inside and outside the pores, resulting in a 27% loading of UiO-66 in the SSU. The SSU spheres were packed into columns and tested for the separation of xylene isomers, aromatics, biomolecules, acidic and basic mixtures. With both micropores and mesopores, SSU achieves excellent separation of both small and large molecules. Efficiencies up to 48150, 50452 and 41318 plates m-1 were achieved for m-xylene, p-xylene and o-xylene, respectively. The relative standard deviations of the retention times of anilines for run-to-run, day-to-day and column-to-column were all lower than 6.1%. The results demonstrate the SSU possessing great prospect for high performance chromatographic separation. © 2023, The Authors. All rights reserved.

关键词： High performance liquid chromatography

Facilitating H+ Ion Heterolysis Using Lattice Strained Pd-Tipped AU Nanorods for Direct H2o2 Synthesis in Pure Water

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SSRN 2023年

作者： Zhang, Fengjun Zhang, Defang Wang, Luyang Zhang, Kan Key Laboratory of Functional Molecule Design and Interface Process Anhui Key Laboratory of Advanced Building Materials Anhui Jianzhu University Anhui Hefei230601 China School of Materials Science and Engineering School of Chemistry and Chemical Engineering Nanjing University of Science and Technology Nanjing210094 China College of New Materials and New Energies Shenzhen Technology University Guangdong Shenzhen518118 China Department of Chemical and Biomolecular Engineering China

Direct H2O2 synthesis (DHS) from H2 and O2 over Pd catalyst is a potentially rewarding strategy to replace the industrial anthraquinone method, but the sluggish hydrogenation process seriously impedes production efficiency in pure water. Here, we report a lattice strained Pd catalyst which is formed on Au nanorods (NRs) tips by taking advantage of curvature. The lattice strained Pd tipped Au NRs (PTA) is found to be able to facilitate the H+ ion heterolysis, in particular with light illumination, thereby remarkably enhancing the DHS performance. The lattice strain effect together with light-induced hot electrons enables a production rate of 0.12 mol/g/h for H2O2 generation, which is 3.11 and 3.56 times higher than that of no light assistance or strain effect ones, respectively. Finally, a porous PTA film was assembled, which achieves a H2O2 concentration of ~2.3% within 24 h that is expected to make for direct medical use ( © 2023, The Authors. All rights reserved.

关键词： Surface plasmons

Research on the Ablation Resistance of Al2O3/PF Composite Coatings Deposited by Supersonic Plasma Spraying on Resin Matrix Surfaces

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SSRN 2024年

作者： Zhu, Yunlong Xu, Xiang Zhang, Jie Meng, Xiang Gao, Rui Wang, Cong Chen, Shuying Peng, Qiqing Wang, Haidou Liu, Ming Hubei Key Laboratory of Hydroelectric Machinery Design & Maintenance China Three Gorges University Yichang443002 China National Key Laboratory for Remanufacturing Army Academy of Armored Forces Beijing100072 China Faculty of Materials Xi’an University of Technology Xi’an710048 China Institute of Surface/Interface Science and Technology Key Laboratory of Superlight Material and Surface Technology of Ministry of Education College of Material Science and Chemical Engineering Harbin Engineering University Harbin150001 China National Key Laboratory of Human Factors Engineering China Astronaut Researchand Training Center Beijing100094 China

Resin material is currently the most widely used insulating support body component in electromagnetic railguns. This is done to enhance the ablation resistance of the resin material and prolong its service life. In this study, three types of Al2O3/PF composite coatings with varying structures were successfully applied to the resin matrix using supersonic plasma spraying technology. The three composite coatings were evaluated for their microscopic morphology, mechanical properties, and tribological properties before and after ablation. It was found that the composite coatings, which were sprayed using alternating layers of pure Al2O3 and Al2O3/PF composite powders, exhibited superior ablation resistance. The alternately sprayed coatings benefited from the reinforcement of the interlayer skeleton, which more effectively promoted the formation of the Al2O3 film. This enhancement conferred the coatings with greater resistance to ablation by the plasma jet. After the ablation treatment, the surface resistivity of the coating remains high at 1014 Ω, demonstrating excellent electrical insulation properties. The formation of an Al2O3 layer on the surface significantly enhances the hardness of the coating, despite the reduction in the modulus of elasticity. In addition, the minimal change in residual stresses enhances the reliability of the coating. Notably, the coefficient of friction was significantly reduced from 0.475 to 0.283, indicating that the alternate coatings are advantageous in reducing energy loss. The comprehensive evaluation results reveal that the overall performance of the alternate coatings reaches the optimum level after undergoing the ablation process. This finding provides an important basis for material selection to enhance the ablation resistance of insulating materials inside EMRL transmitters. It also establishes a solid foundation for the future development and application of related materials. © 2024, The Authors. All rights reserved.

关键词： Composite coatings

Fabrication of Multi-Scale Cds/Zno Heteroarchitectures with Boosted Dual Photocatalytic Activities for Hydrogen Generation and Organic Dye Degradation Under Solar Light

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SSRN 2022年

作者： He, Yunyun Hu, Hanmei Wang, Jian Wang, Xueying Sun, Mei Tian, Changan Deng, Chonghai Key Laboratory of Functional Molecule Design and Interface Process Anhui Jianzhu University Hefei230601 China Anhui Province Key Laboratory of Advanced Building Materials Anhui Jianzhu University Hefei230601 China School of Chemistry and Civil Engineering Shaoguan University Shaoguan512005 China School of Energy Materials and Chemical Engineering Hefei University Hefei230601 China

Binary multi-scale CdS/ZnO heterogeneous architectures comprised of zero-dimensional (0D) CdS nanoparticles depositing onto 3D flower-like architectures self-aggregated by 2D ZnO nanoflakes have been successfully fabricated by a facile aqueous chemical process. The H2-generation rate of the optimized CZ-3 is calculated to be 15.682 mmol·g-1·h-1 under simulated solar irradiation, which is 15.25, 101.17 and 39.70 times higher than that of pristine ZnO, bare CdS, and the physical mixture, respectively. The photocatalytic oxidation kinetics rate constant over the optimal CZ-3 in degradation of Congo red is measured to be 0.05686 min-1 under simulated sunlight, which reaches 7.21, 9.07, 5.82 folds higher than that of pristine ZnO, pure CdS, and the physical mixture, respectively. The dual boosted photocatalytic performance of CdS/ZnO composite is assigned to the synergetic multi-scale heteroarchitecture with the interfacial heterojunction. The photocatalytic electron transfer mechanism is proposed based on the perfect band matching and the free radical experiments. © 2022, The Authors. All rights reserved.

关键词： Cadmium sulfide

Electrochemical Realization of 3D Interconnected MoS_(3)/PPy Nanowire Frameworks as Sulfur-Equivalent Cathode materials for Li-S Batteries

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Energy & Environmental materials 2024年第2期7卷 9-17页

作者： Hongtao Yu Andreas Siebert Shilin Mei Raul Garcia-Diez Roberto Félix Ting Quan Yaolin Xu Johannes Frisch Regan G.Wilks Marcus Bär Chun Pei Yan Lu Department for Electrochemical Energy Storage Helmholtz-Zentrum Berlin für Materialien und Energie GmbH(HZB)Hahn-Meitner Platz 114109 BerlinGermany Guangdong Province Key Laboratory of Durability for Marine Civil Engineering School of Civil EngineeringShenzhen UniversityShenzhenGuangdong 518060China Department of Interface Design HZBAlbert-Einstein-Str.1512489 BerlinGermany Energy Materials In-Situ Laboratory Berlin(EMIL) Albert-Einstein-Str.1512489 BerlinGermany Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy(HI ERN) Albert-Einstein-Str.1512489 BerlinGermany Department of Chemistry and Pharmacy Friedrich-Alexander-Universität Erlangen-NürnbergEgerlandstr.391058Erlangen Germany Institute of Chemistry University of Potsdam14467Potsdam Germany

The development of freestanding and binder-free electrode is an effective approach to perform the inherent capacity of active materials and promote the mechanism study by minimizing the interference from ***,we construct a freestanding cathode composed of MoS_(3)/PPy nanowires(NWs)deposited on porous nickel foam(NF)(MoS_(3)/PPy/NF)through electrochemical methods,which can work efficiently as sulfur-equivalent cathode material for Li-S *** structural stability of the MoS_(3)/PPy/NF cathode is greatly enhanced due to its significant tolerance to the volume expansion of MoS_(3)during the lithiation process,which we ascribe to the flexible 3D framework of PPy NWs,leading to superior cycling performance compared to the bulk-MoS_(3)/NF *** the interference of binder and carbon additives,the evolution of the chemical and electronic structure of Mo and S species during the discharge/charge was studied by X-ray absorption near-edge spectroscopy(XANES).The formation of lithium polysulfides was excluded as the driving cathode reaction mechanism,suggesting the great potential of MoS_(3)as a promising sulfur-equivalent cathode material to evade the shuttle effect for Li-S *** present study successfully demonstrates the importance of structural design of freestanding electrode enhancing the cycling performances and revealing the corresponding mechanisms.

关键词： 3D-Network electrochemical lithium-sulfur battery MoS_(3) PPy

Tio2 Coated Sio2 Core-Shell Stationary Phase with Uniform and Tunable Tio2 Thickness for High Performance Liquid Chromatography Separation

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SSRN 2023年

作者： Wang, Dian Wan, Xiang Wang, Jiafei Mangelings, Debby Sun, Yuanshe Li, Tong Xu, Qin Xie, Fazhi Li, Weihua Qu, Qishu Key Laboratory of Functional Molecule Design and Interface Process Anhui Province Engineering Laboratory of Advanced Building Materials School of Materials Science and Chemical Engineering Anhui Jianzhu University Hefei230601 China Department of Analytical Chemistry Applied Chemometrics and Molecular Modelling Vrije Universiteit Brussel Laarbeeklaan 103 BrusselsB-1090 Belgium Dalian Elite Analytical Instruments Co. Ltd. Dalian116023 China College of Chemistry and Chemical Engineering Yangzhou University Yangzhou225002 China Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse School of Environment and Energy Engineering Anhui Jianzhu University Hefei230601 China

In this work, SiO2 core-shell spheres with a dendritic pore structure were used as chromatographic support and TiO2 was coated into the pores of the SiO2@dSiO2 shell using tetrabutyl orthotitanate (TBOT) as the titanium source. By simply prolonging the reaction time, a TiO2 layer with a uniform and controllable thickness was obtained on the surface of SiO2 core-shell spheres by Ostwald ripening. The thickness of the TiO2 layer can be achieved by either controlling the reaction time or controlling the amount of TBOT. When the concentration of TBOT was 0.06 mol L-1, the thickness of the TiO2 layer can be tuned from 15 to about 44 nm by changing the reaction time. When the concentration of TBOT was 0.08 mol L-1, the thickness of the TiO2 layer can be tuned from 21 to about 71 nm by changing the reaction time. C18-derived core-shell spheres with a TiO2 layer thicknesses of 40 nm (C18-SST-0.5-60) and 70 nm (C18-SST-0.7-30) were used as packings to evaluate the effect of TiO2 layer thickness on the chromatographic separation performance. The separation performance of C18-SST-0.5-60 was better than that of C18-SST-0.7-30. The separation efficiency of C18-SST-0.5-60 and C18-SST-0.7-30 for fluorene was 115112 plates m-1 and 83189 plates m-1, respectively. The columns were also used for the separation of basic, acidic and nucleoside mixtures. Both TiO2-coated core-shell packings showed good peak symmetry for basic samples, with peak asymmetry factors below 1.11. The relative standard deviations of the retention time of polycyclic aromatic hydrocarbons and anilines for intraday, interday and column-to-column variation were all lower than 6%. The results demonstrate that the TiO2 based stationary phase possesses great potential for high performance liquid chromatographic separation. © 2023, The Authors. All rights reserved.

关键词： Silica

Short Stick-Shaped Mn0.5cd0.5s Grown in Situ on Cuse Nanosheets for Efficient Photocatalytic Hydrogen Evolution

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SSRN 2022年

作者： Jiang, Jingjing Zhang, Fengjun Liu, Chao Wang, Yingrui Meng, Zeda Mi, Chaoqun Key Laboratory of Functional Molecule Design and Interface Process Anhui Jianz hu University Anhui Hefei230601 China Anhui Key Laboratory of Advanced Building Materials Anhui Jianzhu University Anhui Hefei230022 China Key Laboratory of Functional Molecule Design and Interface Process Anhui Jianzhu University Anhui Hefei230601 China Construction Economy and Real Estate Management Research Center Anhui Jianzhu University Anhui Hefei230601 China Suzhou University of Science and Technology School of Chemistry and Life Scienc Suzhou215009 China Third Engineering Group of China Railway Shanghai Engineering Bureau Co. Ltd Anhui Hefei230051 China

The development of efficient and stable photocatalysts is very important for photocatalytic hydrogen evolution. In this work, a series of CuSe/Mn0.5Cd0.5S composites with high hydrogen evolution performance were synthesized by a simple hydrothermal method. The synthesized products were characterized by X-ray diffraction, Scanning electron microscopy, Transmission electron microscope, Mapping, X-ray photoelectron spectroscopy, UV-Vis diffuse reflection spectroscopy, Mott–Schottky, Transient photocurrent response, Electrochemical Impedance Spectroscopy, and Photoluminescence Spectroscopy. The obtained products showed efficient photocatalytic hydrogen evolution efficiency in Na2S·9H2O-Na2SO3 solution under visible light, with the highest photocatalytic hydrogen evolution efficiency reaching 24.73 mmol g-1 h-1, which was 4.1 times higher than pure Mn0.5Cd0.5S (5.99 mmol h-1 g-1) and 6.3 times higher than pure CdS (3.59 mmol h-1 g-1). A possible mechanism of photocatalytic hydrogen production was proposed. The addition of CuSe effectively enhances the photogenerated electron-hole separation efficiency and reduces the electron-hole pair complexation rate of CuSe/Mn0.5Cd0.5S composites. This work provides an effective way to improve the photocatalytic activity of Mn0.5Cd0.5S using transition metal selenide co-catalysts. © 2022, The Authors. All rights reserved.

关键词： Scanning electron microscopy