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Recent progress in ternary mixed matrix membranes for CO_(2) separation

Green Energy & Environment 2024年第5期9卷 831-858页

作者： Zikang Qin Yulei Ma Jing Wei Hongfang Guo Bangda Wang Jing Deng chunhai Yi Nanwen Li Shouliang Yi Yi Deng Wentao Du Jian Shen Wenju jiang Lu Yao Lin Yang Zhongde Dai College of Architecture and Environment Sichuan UniversityChengdu610065China College of Carbon Neutrality Future Technology Sichuan UniversityChengdu610065China National Engineering Research Centre for Flue Gas Desulfurization Chengdu610065China Carbon Neutral Technology Innovation Center of Sichuan Chengdu610065China School of Chemical Biological and Materials EngineeringUniversity of OklahomaNormanOK73019USA Shaanxi Key Laboratory of Energy Chemical Process Intensification School of Chemical Engineering and TechnologyXi'an Jiaotong UniversityXi'an710049China State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan030001China US DOE Natl Energy Technol Lab626 Cochrans Mill RdPittsburghPA 15236USA DongFang Boiler Co. Ltd.China Clean Combustion and Flue Gas Purification Key Laboratory of Sichuan Province Chengdu611731China College of Environment and Resources Xiangtan UniversityXiangtan411105China

Mixed matrix membranes(MMMs)could combine the advantages of both polymeric membranes and porousﬁllers,making them an effective alternative to conventional polymer membranes.However,interfacial incompatibility issues,such as the presence of interfacial voids,hardening of polymer chains,and blockage of micropores by polymers between common MMMsﬁllers and the polymer matrix,currently limit the gas sep-aration performance of MMMs.Ternary phase MMMs(consisting of aﬁller,an additive,and a matrix)made by adding a third compound,usually functionalized additives,can overcome the structural problems of binary phase MMMs and positively impact membrane separation performance.This review introduces the structure and fabrication processes for ternary MMMs,categorizes various nanoﬁllers and the third component,and summarizes and analyzes in detail the CO_(2) separation performance of newly developed ternary MMMs based on both rubbery and glassy polymers.Based on this separation data,the challenges of ternary MMMs are also discussed.Finally,future directions for ternary MMMs are proposed.

关键词： CO_(2) separation Mixed matrix membranes Ternary phase

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Nanoengineering Titania for High Rate Lithium Storage: A Review

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Journal of Materials Science & Technology 2013年第2期29卷 97-122页

作者： chunhai jiang Jinsong Zhang Institute of Metal Research Chinese Academy of Sciences

Nanostructured titania have been intensively investigated as anode materials of Li-ion batteries for their excellent high rate performance. The size effects of TiO2 polymorphs （mainly rutile, anatase and TiO2-B） on their electrochemical performance and the latest efforts in nanoengineering titania anodes through enhancing their ionic or electronic transportation or both are reviewed in this work. We suppose that micron- or submicron- sized porous structures assembled by TiO2 nanoparticles, nanowires/nanotubes or nanosheets with a high percentage of exposing high reactive facets together with a conductive percolating network are ideal anodes not only for high rate lithium storage but also for high packing densities of the active materials.

关键词： Li-ion batteries Titania： Nanostructures Rate capability

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Nitrogen-doped amorphous carbon coated mesocarbon microbeads as excellent high rate Li storage anode materials

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Journal of Materials Science & Technology 2019年第4期35卷 644-650页

作者： Zhimin Zou chunhai jiang Fujian Provincial Key Laboratory of Functional Materials and Applications Institute of Advanced Energy MaterialsSchool of Materials Science and EngineeringXiamen University of Technology

A composite anode material consisting of a stable inner core of mesocarbon microbeads and a porous nitrogen-doped amorphous carbon shell active for lithium storage is prepared. The thin birnessite MnO_2 nanosheets hydrothermally deposited on mesocarbon microbeads are in situ replaced by polypyrrole,which is then transformed to nitrogen-doped amorphous carbon layer by calcination in nitrogen atmosphere. The surface modified mesocarbon microbeads exhibit average discharge capacities of 444 and103 m A h g^(-1) at the current densities of 0.1 and 3 A g^(-1) , respectively, obvious higher than the corresponding values of the bare sample, 371 and 60 mA h g^(-1) . Moreover, the composite anode maintains a discharge capacity of 306 mA h g^(-1) after 500 cycles at 1 A g^(-1) , suggesting an excellent cycle stability. It is believed that the nitrogen-doped amorphous carbon layer has provided additional lithium storage capacity and stabilized the structure integrity of mesocarbon microbeads. This work demonstrates that the capacity and rate performance of commercial graphitic carbons can be much improved by simply introducing a nitrogen-doped carbon coating layer active for Li storage, making them attractive for high power Li-ion batteries.

关键词： Li-ion batteries MCMBs Anode Carbon coating Rate capability

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Nitrogen and oxygen co-doped mesoporous carbon spheres as capacitive anode for high performance sodium-ion capacitors

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Journal of Materials Science & Technology 2021年第24期83卷 188-195页

作者： chunhai jiang Wenyang Zhou Zhimin Zou Fujian Provincial Key Laboratory of Functional Materials and Applications Institute of Advanced Energy MaterialsSchool of Materials Science and EngineeringXiamen University of TechnologyXiamen361024China

The poor rate capability of battery-type anode is usually the bottleneck of the power-energy outputs of a hybrid alkaline metal ion capacitor.In this work,nitrogen and oxygen co-doped mesoporous carbon spheres with excellent rate performance and cycle stability are used as anode materials of sodium ion capacitors(SICs).The high N and O element doping levels as well as the amorphous and mesoporous structure have enabled prominent capacitive Na ion storage behavior,which in turn match well with the capacitive cathode in the hybrid device.Under optimum conditions,the SIC delivers a high energy density of 103.1 Wh kg^(-1)at a power density of 205.6 W kg^(-1).Even at a high power density of 7520 W kg^(-1),an energy density of 23.5 Wh kg^(-1)is still maintained.Moreover,a robust cycle stability with capacity retention of 84.6%after 2500 cycles at 1 A g^(-1)is maintained.Such excellent electrochemical performances convincingly demonstrate that the all-carbon based SICs with the highly capacitive N and O co-doped mesoporous carbon anode can be promising Na ion-based energy storage devices alternative to their Li ion-based counterparts.

关键词： N and O co-doping Carbon anode Na-ion capacitors Energy density Cycle stability

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Hydrochlorination of Acetylene Using SiC Foam Supported Structured C/Au Catalysts

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Journal of Materials Science & Technology 2014年第5期30卷 434-440页

作者： Xiaodan Yang chunhai jiang Zhenming Yang Jinsong Zhang Institute of Metal Research Chinese Academy of Sciences

AuCl3 loaded structured catalysts were prepared on SiC foam supported with pre-coated activated carbon layers. The catalytic properties of the structured catalysts towards hydrochlorination of acetylene were tested in a fixed- bed reactor with the AuCl3 loaded on activated carbon pellets as a reference. For isopyknic catalysts, the structured catalyst with only one fifth of the Au amount as that was used on the reference catalyst exhibited even a little higher acetylene conversion and much better stability than the latter no matter what the gas hourly space velocities of acetylene were used. The results indicated that the more homogeneous distribution of AuCl3 particles and better heat transfer along the fixed-bed reactor originated from the low pressure drop and high thermal conductivity of the SiC foam supported structured catalysts might be able to account for their improved efficiency and stability. It is befieved that these novel structured C/Au catalysts can be potentially applied in VCM industrialization in view of their greatly reduced cost and much prolonged life.

关键词： Structured catalysts Acetylene hydrochlorination Silicon carbide foams Carbon coating Heterogeneous reaction

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Photocatalytic Activities of TiO_2 Coated on Different Semiconductive SiC Foam Supports

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Journal of Materials Science & Technology 2013年第11期29卷 1074-1078页

作者： Dong Hao Zhenming Yang chunhai jiang Jinsong Zhang Institute of Metal Research Chinese Academy of Sciences University of Chinese Academy of Sciences

Different semiconductive SiC foam supports were prepared by varying the sintering temperature and atmosphere, and with or without alkaline solution treatment and high temperature oxidation following a macromolecule pyrogenation combined with reaction bonding method. Nano-TiO2 particles were immobilized onto these SiC foam supports by a composite sol-gel method. The phase, surface morphology, the type of conduction and the photocatalytic activity of the TiO2-SiC composite photocatalysts were studied. The TiO2 coated on p-type Si-free SiC support showed the highest photocatalytic efficiency in degradation of 4- aminobenzenesulfonic acid （4-ABS） in aqueous solution as compared to that coated on n-type SiC support and p-type SiC supports with residual Si or Si02 on the surface. The result showed that the TiO2 coatings immobilized on p-type semiconductive SiC foam supports exhibited obviously higher photocatalytic activity in comparison to that coated on n-type SiC foam support. The p-n heterojunctions formed between the p-type SiC supports and n-type TiO2 coatings might be able to account for the better charge separation and transfer as well as the photocatalytic activity of the TiO2-SiC composite photocatalyst.

关键词： SiC foam ceramics TiO2 coating Composite Sol-Gel Photocatalytic activity

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Copolymerization-Assisted Preparation of Porous LiMn_2O_4 Hollow Microspheres as High Power Cathode of Lithium-ion Batteries

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Journal of Materials Science & Technology 2017年第8期33卷 781-787页

作者： Zhimin Zou Zhaojin Li Hui Zhang Xiaohui Wang chunhai jiang Fujian Provincial Key Laboratory of Functional Materials and Applications Institute of Advanced Energy Materials School of Materials Science and Engineering Xiamen University of Technology Institute of Metal Research Chinese Academy of Sciences

Porous LiMn2O4 hollow microspheres were facilely prepared by incorporation of Li and Mn elements into a spherical polymeric precursor through copolymerization of lithium and manganese acetates with resorcinol and hexamethylenetetramine and then burning off the organic matrix at appropriate temperatures in air. The LiMn2O4 inherited the spherical morphology of the polymeric precursor but showed hollow porous structure assembled by nanocrystals of about 50–100 nm in size. When tested as cathode of Li-ion batteries, the LiMn2O4 hollow spheres exhibited excellent rate capability and cycle stability.A discharge capacity of above 90 mAh g-1was maintained at 10 C（1C = 120 mAg-1）, and the cells can still deliver a discharge capacity over 100 mAhg-1after another 115 cycles at 0.5 C. With such excellent electrochemical properties, the prepared LiMn2O4 hollow microspheres could be promising cathode of Li-ion batteries for long term and high power applications.

关键词： Li-ion batteries Cathode LiMn2O4 Hollow spheres Rate capability

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异型钢独塔斜拉桥抗震性能分析

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城市道桥与防洪 2024年第3期 63-67,M0008页

作者：蒋春海上海市政工程设计研究总院(集团)有限公司上海市200092

青海省西宁市西平大街异型钢独塔斜拉桥的结构、交通荷载较为复杂。为了保证该桥的抗震安全,使项目能够顺利进行,从桥梁空间动力模型建模、摩擦摆支座模拟、地震动输入方向3个方面进行分析,完成了桥梁的建模计算。结果表明:沿纵桥向输... 详细信息

青海省西宁市西平大街异型钢独塔斜拉桥的结构、交通荷载较为复杂。为了保证该桥的抗震安全,使项目能够顺利进行,从桥梁空间动力模型建模、摩擦摆支座模拟、地震动输入方向3个方面进行分析,完成了桥梁的建模计算。结果表明:沿纵桥向输入地震动时,边塔的轴力和剪力远大于主塔,而沿横桥向输入地震动时,主塔的轴力、剪力和弯矩均大于边塔;选用的摩擦摆减隔震支座设计减隔震起始力为竖向承载力的10%,在E2强震作用下,支座进入减隔震摆动工作状态,有效延长了结构自振周期,实现了该桥减隔震设计;伸缩缝的设置应预留足够梁体位移量,以避免地震时梁体与桥台发生碰撞;桥台与主梁之间设置黏滞阻尼器,可有效控制梁体和桥塔的纵向位移,并起到减震耗能的作用。

关键词：斜拉桥抗震计算减隔震阻尼器

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Novel TiC/Ti Open Cellular Foams Prepared by a Modified Sponge-coating Method Using High Frequency Induction Heating Process

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Journal of Materials Science & Technology 2013年第4期29卷 339-343页

作者： Yong Gao Xingxiang Xu Zhenming Yang Junqi Zhang chunhai jiang Jinsong Zhang Institute of Metal Research Chinese Academy of Sciences

A new kind of open cellular foam material with three dimensionally interconnected TiC/Ti struts was prepared by a two-step sponge-coating and high frequency induction heating process. The microstructure, composition and compression strength of the prepared TiC/Ti foam materials were characterized. It was confirmed that the incorporation of Ti into TiC resulted in an inter-bonded Ti-TiC-Ti layered structure in the struts, which enhanced the plasticity of the composite foam materials.

关键词： TiC/Ti foams Composite Sintering Porosity Mechanical properties

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环境规制与公平竞争:理论逻辑、现实解析及协调思路——基于异质性企业的视角

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上海财经大学学报（哲学社会科学版） 2024年第2期26卷 50-64页

作者：田露露韩超姜春海青岛科技大学经济与管理学院山东青岛266061 东北财经大学产业组织与企业组织研究中心辽宁大连116025

在公平竞争理念已成为全社会基本共识的情形下,其与环境规制的关系少有涉及和探讨。为此,文章首先厘清了环境规制与公平竞争之间关系的理论逻辑,接着基于异质性企业视角,从规制立法并未考虑企业的异质性、规制执法的选择性和偏向性、作... 详细信息

在公平竞争理念已成为全社会基本共识的情形下,其与环境规制的关系少有涉及和探讨。为此,文章首先厘清了环境规制与公平竞争之间关系的理论逻辑,接着基于异质性企业视角,从规制立法并未考虑企业的异质性、规制执法的选择性和偏向性、作为市场主体不正当竞争的工具、促使企业向规制强度较弱地区转移四方面归纳了环境规制影响公平竞争的具体路径。随后从现实原因与理论症结层面解析二者相冲突的深层次原因,发现规制方式不完善、地方执法机构专业性与独立性缺乏、规制理论并未包含公平竞争是造成此现象的根源所在。最后提出须通过在环境规制中引入公平竞争、基于企业的异质性完善既有规制方式、提高环境规制机构的专业性与独立性、协调区域间环境规制政策四个途径对二者的关系加以改进。文章为在环境规制领域践行公平竞争理念提供了理论参考和现实路径。

关键词：环境规制公平竞争异质性企业规制方式不对称规制强度

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