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Boosting Capacitive Deionization Performance of Commercial Carbon Fibers Cloth via Structural Regulation Based on Catalytic-Etching Effect

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Energy & Environmental Materials 2023年第1期6卷 242-252页

作者： Chunjie Zhang Dong Wang Zhen Wang Guangshuai Zhang Zhichao Liu jie Wu jin Hu Guangwu wen School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China School of Materials Science and Engineering Shandong University of TechnologyZibo 255000China Shandong Industrial Ceramics Research&Design Institute Co. Ltd.Zibo 255000China

Monolithic carbon electrodes with robust mechanical integrity and porous architecture are highly desired for capacitive deionization but remain *** to the excellent mechanical strength and electroconductivity,commercial carbon fibers cloth demonstrates great potential as high-performance electrodes for ions *** this,its direct application on capacitive deionization is rarely reported in terms of limited pore structure and natural ***,a powerful metal-organic framework-engaged structural regulation strategy is developed to boost the desalination properties of carbon *** obtained porous carbon fibers features hierarchical porous structure and hydrophilic surface providing abundant ions-accessible sites,and continuous graphitized carbon core ensuring rapid electrons *** catalytic-etching mechanism involving oxidation of Co and subsequent carbonthermal reduction is proposed and highly relies on annealing temperature and holding *** directly evaluated as a current collector-free capacitive deionization electrode,the porous carbon fibers demonstrates much superior desalination capability than pristine carbon fibers,and remarkable cyclic stability up to 20 h with negligible ***,the PCF-1000 showcases the highest areal salt adsorption capacity of 0.037 mg cm^(−2) among carbon ***,monolithic porous carbon fibers-carbon nanotubes with increased active sites and good structural integrity by in-situ growth of carbon nanotubes are further fabricated to enhance the desalination performance(0.051 mg cm^(−2)).This work demonstrates the great potential of carbon fibers in constructing high-efficient and robust monolithic electrode for capacitive deionization.

关键词： capacitive deionization carbon fibers cloth catalytic-etching monolithic electrodes

Primary gastric melanoma in a young woman:A case report

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World Journal of Clinical Cases 2020年第24期8卷 6425-6431页

作者： Guo-jie Long wen-Ting Ou Lin Lin Cai-jin Zhou Department of Gastrointestinal Surgery Affiliated Hospital of Guangdong Medical UniversityZhanjiang 524002Guangdong ProvinceChina Department of Oncology Affiliated Hospital of Guangdong Medical UniversityZhanjiang 524002Guangdong ProvinceChina

BACKGROUND Most melanomas identified in the stomach are *** primary gastric melanoma(PGM)is extremely *** such,clinical reports of PGM are scarce in the literature,lending to the challenge of diagnosis and *** SUMMARY A 31-year-old woman presented with a 1-mo history of dysphagia but no symptoms of abdominal pain,abdominal distension,nausea,vomiting,hematemesis,or *** patient reported an unintentional weight loss of 6 kg within that ***-taking revealed no previous medical conditions or surgical *** computed tomography at a local hospital had suggested gastric *** examination in our hospital found a large,irregular,black *** laparoscopic exploration found the tumor on the side of the stomach fundus penetrating through the serosa,and enlarged lymph nodes(groups 1,3,7,and 9)fused into a mass,surrounding the peripheral artery and *** immunohistochemistry suggested gastric malignant *** emission tomography-computed tomography confirmed *** with programmed cell death protein 1 antagonist(toripalimab)plus chemotherapy(paclitaxel)was initiated but discontinued upon tumor *** the last telephone follow-up,the patient reported poor general condition but was *** Although unresolved and ongoing,this rare case of PGM expands the overall knowledge about this rare tumor’s diagnosis and management.

关键词： Primary gastric melanoma Pathogenesis Diagnosis Treatment Prognosis Case report

Nanoscale precipitates and comprehensive strengthening mechanism in AISI H13 steel

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International Journal of Minerals,Metallurgy and Materials 2016年第9期23卷 1056-1064页

作者： wen-wen Mao An-gang Ning Han-jie Guo School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Special Melting and Reparation of High-end Metal Materials Beijing 100083China College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuanShanxi 030024China

The effects of heat treatment on the precipitates and strengthening mechanism in AISI H13 steel were investigated. The results showed that the presence of nanoscale precipitates favorably affected grain refinement and improved the yield strength. The volume fraction of precipitates increased from 1.05% to 2.85% during tempering, whereas the average precipitate size first decreased then increased during tempering. Contributions to the yield strength arising from the various mechanisms were calculated quantificationally, and the results demonstrated that grain refinement and dislocation density most strongly influenced the yield strength. In addition, under the interaction of average size and volume fraction, precipitates＇ contribution to the yield strength ranged from 247.9 to 378.5 MPa. Finally, a root-mean-square summation law of σ = σg ＋ σs ＋（σd^2 ＋ σp^2）^1/2, where σg, σs, σd, and σp represent the contributions of fine-grain strengthening, solid-solution strengthening, dislocation strengthening, and precipitation strengthening, respectively, was confirmed as the most applicable for AISI H13 steel, which indicates a strong link between precipitates and dislocations in AISI H13 steel.

关键词： die steel precipitates strengthening dislocation

Single-atom catalysis for advanced oxidation and reduction systems in water decontamination

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Rare Metals 2024年第8期43卷 3576-3606页

作者： jie Teng jin-Hui Xu wen-Xin Sun Xue-Feng Liu Xia Xu Guo-Shuai Liu School of Urban Construction Changzhou UniversityChangzhou 213164China School of Environmental and Civil Engineering Jiangnan UniversityWuxi 214122China

Water scarcity is an escalating global crisis,posing a severe threat to populations ***,exploring various materials to remove emerging contaminants from freshwater sources has garnered significant *** this regard,single-atom catalysis(SACs) has emerged as a catalyst of scientific progress in water purification and treatment methodologies during recent *** exhibit exceptional catalytic activity,selectivity and stability,due to their near-perfect atom utilization,highly unsaturated coordination environment and uniform reaction ***,a comprehensive and critical review encompassing the successful integration of SACs into water purification processes needs to be *** review aims to accentuate recent trends by presenting the synthesis,structure,and environment and energy application-relevant properties of *** results show that a comprehensive and multi-perspective summary of the advantages of SACs in environmental remediation can have significant benefits,such as fast kinetics,costeffectiveness,*** oxidation and reduction processes of SACs and functional SACs materials in water purification were ***,the last section is devoted to the current research gaps and further perspectives on the application of SACs in water treatment,which are summarized and analyzed.

关键词： Single-atom catalysis Water treatment Oxidation Reduction

Coupling potential and viscous flow models with domain decomposition for wave propagations

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Journal of Hydrodynamics 2022年第5期34卷 826-848页

作者： wen-jie Zhong wen-tao Wang De-cheng Wan Computational Marine Hydrodynamics Lab(CMHL) School of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai200240China China Ship Scientific Research Center Wuxi214082China

Either potential flow or viscous flow based model may be flawed for numerical wave *** two-way coupling of potential and viscous flow models with the domain decomposition utilizing respective strengths has been a trending research *** contrast to existing literatures in which closed source potential models were used,the widely used open source OceanWave3D,OpenFOAM-v2012 are used in the present *** innovative overlapping two-way coupling strategy is developed utilizing the ghost points in *** guarantee computational stability,a relaxation zone used both for outlet damping and data transfer is built over the overlapping region in *** free surface elevation in the relaxation zone is directly probed in OpenFOAM while the velocity potential is indirectly built upon its temporal variation which is calculated by the free surface boundary condition using the probed *** coupling is achieved based on the fourth-order Runge-Kutta(RK)*** two-and three-dimensional tests including linear,nonlinear,irregular,and multi-directional irregular waves,are *** effectiveness of the coupling procedure in bidirectional data transfer is fully demonstrated,and the model is validated to be accurate and efficient,thus providing a competitive alternative for ocean wave simulations.

关键词： Domain decomposition numerical wave tank potential/viscous flow coupling irregular waves wave-structure interaction

Structural,mechanical,thermodynamic and electronic properties of Pt_(3)M(M=Al,Co,Hf,Sc,Y,Zr)compounds under high pressure

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Rare Metals 2021年第5期40卷 1208-1218页

作者： Zong-Bo Li Kai Xiong Cheng-Chen jin Ying-jie Sun Bao-wen Wang Shun-Meng Zhang Jun-jie He Yong Mao Materials Genome Institute National Center for International Research on Photoelectric and Energy MaterialsSchool of Materials and EnergyYunnan UniversityKunming 650091China

In this work,the impacts of pressure on the structural,mechanical,thermodynamic and electronic properties of typical Pt_(3)M(M=Al,Co,Hf,Sc,Y,Zr)compounds were investigated systematically by the firstprinciples density function theory *** calculated lattice parameters,volume and elastic constants of Pt_(3)M compounds are in good agreement with available experimental and calculation *** the increase in pressure,the lattice parameters and volume of Pt_(3)M compounds decrease,while the elastic constants,bulk modulus,shear modulus and Young’s modulus *** variations in Pugh’s ratio and Poisson’s ratio indicate that these Pt_(3)M compounds are mechanically stable and *** mechanical anisotropy of these Pt_(3)M compounds is enhanced by rising *** analysis indicates that sound velocity and Debye temperature increase with the increase in *** charge distribution does not change obviously,implying that no phase transition occurs in the range of 0-100 GPa.

关键词： Platinum intermetallic compounds Elastic constants Anisotropy Debye temperature First-principles

Microstructure and mechanical properties of WC-(Ti,M)(C,N)-Co cemented carbides with different nitrogen contents

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Rare Metals 2022年第10期41卷 3530-3538页

作者： Han-jie Fan Ying Liu jin-wen Ye Wei-Bin Qiu Yu-Chong Qiu School of Materials Science and Engineering Sichuan UniversityChengdu610065China

Three kinds of(Ti,M)(C_(1-x),N_(x))(M=Ta,Nb,W) quaternary solid-solution powders with various nitrogen contents were synthesized by carbothermal reductionnitridation(CRN) *** of nitrogen content on the microstructure and mechanical properties of WC-(Ti,M)(C_(1-x),N_(x))-Co cemented carbides fabricated by sinterhot isostatic pressing(HIP) were systematically investigated in this *** results show that the nitrogen content in the carbonitride raw powders strongly influences the morphology,the grain size and the compositions of the cemented *** the cemented carbides with different nitrogen contents have a similar microstructural appearance:weak core-rim structure consisting of solidsolution phase embedded in WC-Co *** is also observed that the carbonitride solid solution could somewhat reduce the WC grain growth,and the effectiveness of refining and the rim thickness are sensitively related to the nitrogen content of(Ti,M)(C_(1-x),N_(x)) solid *** addition,with an increase in the nitrogen content,mechanical properties of these hard metals are enhanced,which were discussed in terms of the constituent,the microstructure and the solution behavior of the carbonitride solid solutions.

关键词： Cemented carbides Solid-solution powders Nitrogen content Mechanical properties

The effect of the density difference between supercritical CO_(2) and supercritical CH_(4) on their adsorption capacities: An experimental study on anthracite in the Qinshui Basin

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Petroleum Science 2022年第4期19卷 1516-1526页

作者： Si-jie Han Shu-Xun Sang Piao-Piao Duan jin-Chao Zhang wen-Xin Xiang Ang Xu Jiangsu Key Laboratory of Coal-based Greenhouse Gas Control and Utilization China University of Mining and TechnologyXuzhouJiangsu221008China Carbon Neutrality Institute China University of Mining and Technology XuzhouJiangsu221008China School of Resources and Geosciences China University of Mining and TechnologyXuzhouJiangsu221116China

Deep unmineable coals are considered as economic and effective geological media for CO_(2) storage and CO_(2) enhanced coalbed methane(CO_(2)-ECBM) recovery is the key technology to realize CO_(2) geological sequestration in coals. Anthracite samples were collected from the Qinshui Basin and subjected to mercury intrusion porosimetry, low-pressure CO_(2) adsorption, and high-pressure CH_(4)/CO_(2) isothermal adsorption experiments. The average number of layers of adsorbed molecules(ANLAM) and the CH_(4)/CO_(2) absolute adsorption amounts and their ratio at experimental temperatures and pressures were calculated. Based on a comparison of the density of supercritical CO_(2) and supercritical CH_(4), it is proposed that the higher adsorption capacity of supercritical CO_(2) over supercritical CH_(4) is the result of their density differences at the same temperature. Lastly, the optimal depth for CO_(2)-ECBM in the Qinshui Basin is recommended. The results show that:(1) the adsorption capacity and the ANLAM of CO_(2) are about twice that of CH_(4) on SH-3 anthracite. The effect of pressure on the CO_(2)/CH_(4) absolute adsorption ratio decreases with the increase of pressure and tends to be consistent.(2) A parameter(the density ratio between gas free and adsorbed phase(DRFA)) is proposed to assess the absolute adsorption amount according to the supercritical CO_(2)/CH_(4) attributes. The DRFA of CO_(2) and CH_(4) both show a highly positive correlation with their absolute adsorption amounts, and therefore, the higher DRFA of CO_(2) is the significant cause of its higher adsorption capacity over CH_(4) under the same temperature and pressure.(3) CO_(2) adsorption on coal shows micropore filling with multilayer adsorption in the macro-mesopore, while methane exhibits monolayer surface coverage.(4) Based on the ideal CO_(2)/CH_(4) competitive adsorption ratio, CO_(2) storage capacity, and permeability variation with depth, it is recommended that the optimal depth for CO_(

关键词： CO_(2)geological storage Competitive adsorption Deep unmineable coal Average number of layers of adsorbed molecules Density ratio between free phase and adsorbed phase Micropore filling

Decoupled thermal–hydraulic analysis of an air-cooled separated heat pipe for spent fuel pools under natural convection

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Nuclear Science and Techniques 2023年第6期34卷 183-197页

作者： Hui-Lin Xue Jian-jie Cheng Wei-Hao Ji wen-jin Li Han-Zhong Tao Wei Li College of Urban Construction Nanjing Tech UniversityNanjing211800China School of Energy Science and Engineering Nanjing Tech UniversityNanjing211800China

An investigation of the decoupled thermal–hydraulic analysis of a separated heat pipe spent fuel pool passive cooling system(SFS)is essential for practical engineering *** on the principles of thermal and mass balance,this study decoupled the heat transfer processes in the *** accordance with the decoupling conditions,we modeled the spent fuel pool of the CAP1400 pressurized water reactor in Weihai and used computational fluid dynamics to explore the heat dissipation capacity of the SFS under different air temperatures and wind *** results show that the air-cooled separated heat pipe radiator achieved optimal performance at an air temperature of 10℃ or wind speed of 8 m/*** equations for the equivalent thermal conductivity of the separated heat pipes with the wind speed and air temperature we obtained according to the thermal resistance network *** study is instructive for the actual operation of an SFS.

关键词： Decoupled analysis Separated heat pipe CAP1400 Finned tube radiator Passive cooling