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A functional hydrogel electrolyte doped with graphene oxide enabling ultra-long lifespan zinc metal batteries by inducing oriented deposition

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Journal of Materials Science & technology 2024年第24期191卷 209-219页

作者： Congyuan Wang Jingjing Jiao Jiaxuan Dai Lu Yu Qibing Chen Xiangyu Xie Xiaoping Yang Gang Sui State Key Laboratory of Organic-Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China

The progress of zinc(Zn)metal batteries(ZMBs)is greatly limited by poor cycling stability because of the mutual restrictions of dendrite growth,corrosion reactions,and *** this work,an ultralong lifespan(~7800 h),dendrite-free Zn metal anode is enabled via fabricating a functional hydrogel electrolyte out of polyacrylamide/graphene oxide(GO)/agarose(PGA)with a multifully cross-linked *** synergetic integration of GO nanosheets and double-network structure endows the PGA hydrogel electrolyte with high ionic conductivity and excellent mechanical *** importantly,the abundant hydrophilic groups and stable three-dimensional cross-linked network of PGA electrolyte effectively constrain Zn^(2+)diffusion laterally along the Zn surface,which simultaneously prohibits waterinduced corrosion and thus significantly enhances Zn anode *** theoretical simulations and experiments reveal that the PGA electrolyte is capable of optimizing de-solvation kinetics and harmonizing Zn^(2+)flux at the electrolyte-electrode interface,ensuring uniform Zn^(2+)***,an ultra-long lifespan of 7800 h is achieved in the symmetric cell with the PGA *** at a high Zn utilization of 42.7%,it still delivers stable cycling over 1100 *** work provides a practical and beneficial approach to dramatically extending the lifespan of the Zn anode and thus achieving high-performance ZMBs.

关键词： Zinc metal anode Hydrogel electrolyte Graphene oxide Double-network structure Ultra-long lifespan

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Design of pH-universal electrocatalysts for hydrogenevolution reaction

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Carbon Energy 2024年第11期6卷 27-58页

作者： Jingwen Lin Xu Wang Zhenyun Zhao Dongliang Chen Rumin Liu Zhizhen Ye Bin Lu Yang Hou Jianguo Lu State Key Laboratory of Silicon and Advanced Semiconductor Materials School of Materials Science and Engineering Zhejiang UniversityHangzhouChina Institute of Wenzhou Zhejiang UniversityWenzhouChina Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological Engineering Zhejiang UniversityHangzhouChina

The path to searching for sustainable energy has never stopped since thedepletion of fossil fuels can lead to serious environmental pollution andenergy *** water electrolysis to produce hydrogen has beenproven to be a prioritized approach for green resource *** is highlycrucial to explore inexpensive and high-performance electrocatalysts foraccelerating hydrogen evolution reaction(HER)and apply them to industrialcases on a large ***,we summarize the different mechanisms of HERin different pH settings and review recent advances in ***,based on the previous efforts,we discuss severaluniversal strategies for designing pH-independent catalysts and showdirections for the future design of pH-universal catalysts.

关键词： design strategy hydrogen evolution reaction pH-universal electrocatalysts

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Non-isothermal kinetics and characteristics of calcium carbide nitridation reaction with calcium-based additives

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Frontiers of chemical Science and engineering 2024年第4期18卷 49-61页

作者： Zhihan Zhang Mengxiao Yu Xiaoyu Zhang Jinli Zhang You Han School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

The nitridation reaction of calcium carbide and N_(2) at high temperatures is the key step in the production of ***,the challenges faced by this process,such as high energy consumption and poor product quality,are mainly attributed to the lack of profound understanding of the *** study aimed to improve this process by investigating the non-isothermal kinetics and reaction characteristics of calcium carbide nitridation reaction at different heating rates(10,15,20,and 30℃·min^(-1))using thermogravimetric *** kinetic equation for the nitridation reaction of additive-free calcium carbide sample was obtained by combining model-free methods and model-fitting *** effect of different calcium-based additives(CaCl_(2) and CaF_(2))on the reaction was also *** results showed that the calcium-based additives significantly reduced reaction temperature and activation energy E_(a) by about 40% with CaF_(2) and by 55%-60% with CaCl_(2).The reaction model f(α)was also changed from contracting volume(R3)to 3-D diffusion models with D3 for CaCl_(2) and D4 for CaF_(2).This study provides valuable information on the mechanism and kinetics of calcium carbide nitridation reaction and new insights into the improvement of the lime-nitrogen process using calcium-based additives.

关键词： lime-nitrogen calcium carbide calciumbased additive thermogravimetric analysis nonisothermal kinetics

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Effects of pre-strain on hydrogen-induced stress corrosion cracking behavior of Q345R steel in hydrofluoric acid vapor environment

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Corrosion Communications 2024年第4期16卷 71-80页

作者： Hailong Dai Jiahui Tang Shouwen Shi Zhe Zhang Xu Chen School of Chemical Engineering and Technology Tianjin University Tianjin Key Laboratory of Chemical Process Safety and Equipment Technology Zhejiang Institute of Tianjin University

This study investigates microstructure, hydrogen diffusion properties, and stress corrosion cracking(SCC) behavior of Q345R steel subject to pre-applied strains of 1 %, 3 %, and 5 %. The relationship between microstructure and SCC susceptibility in hydrofluoric acid(HF) vapor is examined. It is found that pre-strain cannot change the microstructure of Q345R steel but increases dislocation density. The increasing SCC sensitivity of Q345R steel in HF vapor is associated with the dislocation density induced by pre-strain. With increasing pre-strain, dislocation density and reversible hydrogen trap increase, and interaction between hydrogen and dislocation accelerates hydrogen-induced SCC. In addition, irreversible hydrogen traps caused by high pre-strain can severely aggravate hydrogen-induced SCC, resulting in high SCC vulnerability.

关键词： Q345R steel Hydrogen embrittlement Stress corrosion cracking Hydrofluoric acid

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Particle size distribution design of limited agglomeration via geometric morphology in erythritol crystallization

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Particuology 2024年第11期94卷 158-172页

作者： Mingxuan Li Suoqing Zhang Jiansong Wang Jiahui Li Wei Zhao Leida Zhang Mingyang Chen Dandan Han Junbo Gong State Key Laboratory of Chemical Engineering School of Chemical Engineering and TechnologyTianjin UniversityTianjin300072China Institute of Shaoxing Tianjin UniversityZhejiang312300China Shandong Fuyang Biotechnology Co. Ltd.Shandong253100China Haihe Laboratory of Sustainable Chemical Transformations Tianjin300192China

Regarding sugar and salt crystallization with large single crystals,the agglomerate thermodynamics and geometric morphologies,not the dynamics,dominate the particle size distribution(PSD).To consider this issue,a PSD design model is proposed for limited large crystal *** this model,the agglomeration thermodynamic criticality is determined by estimating the adhesion and dispersion forces between single *** geometric agglomerate morphologies are described by corresponding single crystal units stacking with *** seed well-controlled of population,the key parameters of PSD(D01,D50 and D99)are precisely *** erythritol,the model design accuracies are 92%–99%in the 1.2 L and 10 L crystallizers,indicating that it can design PSD at various crystallization *** the general research attention to microcrystal agglomeration kinetics(mostly active pharmaceutical ingredients),this model effectively guides the sugar and salt PSD design with limited large crystal agglomeration.

关键词： Particle size distribution design Agglomeration Crystal geometric morphology Mathematic model Erythritol

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Progress and prospects of chiral nanomaterials for biosensing platforms

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Rare Metals 2024年第6期43卷 2469-2497页

作者： Yu-Cheng Ouyang Bong-Jun Yeom Yuan Zhao Wei Ma School of Food Science and Technology State Key Laboratory of Food Science and ResourcesJiangnan UniversityWuxi 214122China Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnanUniversityWuxi214122China Department of Chemical Engineering Hanyang UniversitySeoul04763RepublicofKorea

Chiral nanomaterials have distinct chiroptical properties of preferential interactions to circularly polarized ***-based biosensors have emerged for detection of biomolecules,ions and cells in recent *** review provides an extensive overview of biosensors based on chiral nanomaterials,starting with approaches to chiral nanomaterials construction in terms of fabrication *** of chiral nanomaterials and their biosensor applications is presented for different material types,with special emphasis on the role and importance of material properties and signal generation in *** assessed the technological prospects of the emerging fields of chiral construction,circularly polarized luminescence,Raman optical activity and so on along with their current *** venues for future research on chiral nanomaterials in fabrication,biosensing,disease diagnosis and treatment are also presented in the review.

关键词： Chiral nanomaterials Circular dichroism Biosensors

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3D coarse-grained DPM simulation of the MIP reaction-regeneration loop

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Particuology 2024年第6期89卷 57-66页

作者： Yanhao Ye Shuai Zhang Ji Xu Wei Ge State Key Laboratory of Mesoscience and Engineering(formerly State Key Laboratory of Multiphase Complex Systems) Institute of Process EngineeringChinese Academy of SciencesBeijing100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing100049China

The reactor-regenerator loop is the core facility of the maximizing iso-paraffin(MIP)*** the discrete particle method(DPM)simulation can provide detailed information at the particle scale,it has been unable to simulate such a complex loop system due to limitations of coarse-grained(CG)models,computing software,and *** this study,a newly proposed soft-shell CG-DPM model with a CG ratio of up to 800 is used to simulate a 3.5 Mt/a industrial-scale MIP reactor-regenerator *** solid fraction distribution obtained is found to agree well with in-situ *** properties including the distribution of solid fraction,gas and solid velocity,standard derivation of solid fraction with time,temporal distribution of the flow field,and particle residence time distribution are measured in the simulation,which are meaningful to better design and operate such systems in the future.

关键词： Discrete particle method Coarse-grain Maximizing iso-paraffins Full-loop Reaction-regeneration system

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Enhanced photocatalytic hydrogen production from Co-MOF/CN by nitrogen and sulfur co-doped coal-based carbon quantum dots

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Journal of Rare Earths 2024年第5期42卷 838-850,I0002页

作者： Shiyong Xu Mei Li Yijun Wang Caiyun Gao Rongsheng Xu Zhiliang jin School of Chemistry and Chemical Engineering North Minzu UniversityYinchuan750021China Ningxia Key Laboratory of Solar Chemical Conversion Technology.North Minzu University.Yinchuan 750021China State Key Laboratory of National Ethnic Affairs Commission Chemical Technology.North Minzu University Yinchuan750021China

A novel composite photocatalyst for photocatalytic decomposition of water for hydrogen evolution was successfully synthesized by in-situ growth of nitrogen and sulfur co-doped coal-based carbon quantum dots(NSCQDs)nanoparticles on the surface of sheet cobalt-based metal-organic framework(Co-MOF)and graphitic carbon nitride(g-C_(3)N_(4),CN).The structure and properties of the obtained catalysts were systematically *** effectively broaden the absorption of Co-MOF and CN in the visible *** new composite photocatalyst has high hydrogen production activity and the hydrogen production rate reaches 6254μmol/(g·h)at pH=*** the same time,NSCQDs synergy Co-MOF/CN composites have good *** four cycles of hydrogen production,the performance remains relatively *** tran sient photocurrent response and Nyquist plot experimental results further demonstrate the improvement of carrier separation efficiency in composite *** semiconductor type(n-type semico nductor)of the single-phase catalyst was determined by the Mott-Schottky test,and the band structure was *** conductive and valence bands of CN are-0.99 and 1.72 eV,respectively,and the conduction and valence bands of Co-MOF are-1.85 and 1.33 eV,*** e mechanism of the photocatalytic reaction can be inferred,that is,Z-type heterojunction is formed between CN an d Co-MOF,and NSCQDs was used as cocatalyst.

关键词： Nitrogen and sulfur co-doped Coal-based carbon quantum dots Co-MOF CN Photocatalytic hydrogen evolution Rare earths

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Study of high-strength, low-shrinkage dental resin composites with bifunctional polysilsesquioxane

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Dental Materials 2025年第6期41卷 755-767页

作者： Zhou, Qingyang Lin, Jiwei Li, Qifang State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing100029 China Key Laboratory of Carbon Fiber and Functional Polymers Ministry of Education Beijing University of Chemical Technology Beijing100029 China Department of Materials Science and Engineering Beijing University of Chemical Technology Beijing100029 China

Objectives: The aim of this study was to develop a new composite resin to solve the problem of volume shrinkage of conventional dental restorative composite resins during the curing process in order to improve their mechanical properties and reduce the risk of restoration failure. Methods: We synthesized the mercapto-alkenyl click chemical reaction product (MN-POSS) of acrylate-based POSS (MAP-POSS) with N-Acetylcysteine (NAC) using a bifunctional polysilsesquioxane modification technique and improved its dispersion in the resin matrix by physicochemical methods. In addition, methacrylate-based epoxy POSS (ME-POSS) was further synthesized and used to modify acrylate dental resins to form a free radical-cation hybrid light-curing system. Results: The results showed that the composites modified with MN-POSS significantly improved mechanical strength, while the application of ME-POSS effectively reduced polymerization shrinkage, improved the water absorption and dissolution properties of the materials, and enhanced mechanical properties and hardness. This study provides new ideas and material solutions to improve the performance of dental restorative materials. Significance: Both of these improved solutions demonstrate the potential of bifunctional POSS as a modified filler, providing new ideas and methods for the design of future dental restorative materials. © 2025

关键词： Brinell Hardness

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Gradient imprinted Zn metal anodes assist dendrites-free at high current density/capacity

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Chinese Journal of Structural Chemistry 2024年第10期43卷 1-2页

作者： Yunfei Shen Long Chen School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering Shihezi UniversityShihezi832003China

There are still some challenges to the vigorous development of aqueous zinc-ion batteries(AZIBs).Among them,the dendrites have severely reduced the coulomb efficiency(CE)and cycle life due to the slow and uneven Zn^(2+)transportation kinetics,serious corrosion and hydrogen evolution reaction(HER)at the electrolyte/anode surface/*** zinc dendrites aggravate the interface side reactions,especially at high current density leading to the short circuit,which re-stricts the further application of AZIBs[1].Numerous strategies can effectively suppress zinc dendrites such as interfacial coating construc-tion,electrolyte modification,and separator design,among which the interfacial coating construction method is more suitable for commer-cialization because of its versatility,simplicity and ***,continuous and stable operation of zinc anodes modified via the coating method at high current/capacity is an urgent and important issue to be solved.

关键词： coating corrosion electrolyte

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