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Substantial grain refinement of Al-Mn-Si alloys me diate d by collaborative effect of Al-5Ti-1B refiner and sub-rapid solidification

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Journal of Materials science & technology 2024年第20期187卷 230-239页

作者： Yong-Si Wei Cheng Wang Jiang You Dong Qiu Yipeng Gao Hong Xu Jin Xu Hui-Yuan Wang Key Laboratory of Automobile Materials of Ministry of Education&School of Materials Science and Engineering Nanling CampusJilin UniversityNo.5988 Renmin StreetChangchun130025China Center for Additive Manufacturing School of EngineeringRMIT UniversityMelbourneVIC3001Australia State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Material Science and EngineeringHebei University of TechnologyTianjin300130China

The mechanical properties of as-cast metallic materials depend strongly on the size and shape of grains,which are critical microstructural parameters dictated by the interplay of nucleation and growth of crys-talline solids during *** our experiments,the microstructure transition from coarse colum-nar crystals into fine equiaxed crystals for dilute Al-Mn-Si alloys was achieved by using sub-rapid so-lidification with the addition of Al-5Ti-1B grain *** average grain size of Al alloy was reduced from a millimeter size to 73μ*** temperature gradient calculation,we found that the acqui-sition of fine equiaxed crystals could be attributed to the existence of a high number density of TiB2,acting as effective nucleation sites with an increase in total ***,the curvature su-percooling,constitutional undercooling,thermal undercooling,and kinetic undercooling during sub-rapid solidification were quantitatively determined for given solidification *** results showed that con-stitutional undercooling,rather than thermal undercooling,was primarily responsible for the formation of fine equiaxed grains,with the assistance of Al-5Ti-1B grain *** work provides a new insight into the grain refining mechanism under sub-rapid solidification.

关键词： Aluminum alloys Sub-rapid solidification Columnar-to-equiaxed transition Grain refinement

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A review of anode materials for sodium ion batteries

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新型炭材料（中英文） 2024年第5期39卷 743-769页

作者： Syed Ali Riza XU Ri-gan LIU Qi Muhammad Hassan YANG Qiang MU Dao-bin LI Li WU Feng CHEN Ren-jie Beijing Key Laboratory of Environment Science and Engineering School of Material Science and EngineeringBeijing Institute of TechnologyBeijing 100081China

Lithium-ion batteries(LIBs)are used in electric vehicles and portable smart devices,but lithium resources are dwindling and there is an increasing demand which has to be catered *** ion batteries(SIBs),which are less costly,are a promising replacement for LIBs because of the abundant natural reserves of *** anode of a SIB is a necessary component of the battery but is less understood than the *** review outlines the development of various types of anodes,including carbonbased,metallic and organic,which operate using different reaction mechanisms such as intercalation,alloying and conversion,and considers their challenges and *** for modifying their structures by doping and coating,and also modifying the solid electrolyte interface are *** addition,this review also discusses the challenges encountered by the anode of SIBs and the solutions.

关键词： Sodium ion batteries Anode Carbon material Metallic compound Organic

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Nature-inspired 3D hierarchical carbon nanotube matrices enable extraordinary solar steam generation

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Carbon Energy 2025年第3期7卷 34-48页

作者： Chuanshuai Dong Lei Chen Weiquan Lin Zipai Li Linjie Wei Chaohua Peng Huan Liu Ronghui Qi Lin Lu Lizhi Zhang Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Education Ministry School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhouChina Department of Building Environment and Energy Engineering The Hong Kong Polytechnic UniversityHong KongChina State Key Laboratory of Subtropical Building and Urban Science South China University of TechnologyGuangzhouChina

Interfacial solar evaporation,which captures solar energy and localizes the absorbed heat for water evaporation,is considered a promising technology for seawater desalination and solar energy ***,it is currently limited by its low photothermal conversion efficiency,salt accumulation,and poor ***,inspired by human intestinal villi structure,we design and fabricate a novel intestinal villi-like nitrogen-doped carbon nanotubes solar steam generator(N-CNTs SSG)consisting of three-dimensional(3D)hierarchical carbon nanotube matrices for ultrahigh solar evaporation *** 3D matrices with radial direction nitrogen-doped carbon nanotube clusters achieve ultrahigh surface area,photothermal efficiency,and hydrophilicity,which significantly intensifies the whole interfacial solar evaporation *** new solar evaporation efficiency reaches as high as 96.8%.Furthermore,our ab initio molecular dynamics simulation reveals that N-doped carbon nanotubes exhibit a greater number of electronic states in close proximity to the Fermi level when compared to pristine carbon *** outstanding absorptivity in the full solar spectrum and high solar altitude angles of the 3D hierarchical carbon nanotube matrices offer great potential to enable ultrahigh photothermal conversion under all-day and all-season circumstances.

关键词： fermi level interfacial solar evaporation nitrogen-doped carbon nanotubes photothermal conversion

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Trace ruthenium promoted dual-reconstruction of CoFeP@C/NF for activating overall water splitting performance beyond precious-metals

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Nano Research 2023年第8期16卷 10810-10821页

作者： Jinhong Ren Jie Liu Yunmei Du Shuangshuang Li Mengmeng Wang Bin Li Bo Yang Lei Wang Yanru Liu College of Environment and Safety Engineering Qingdao University of Science and TechnologyQingdao 266042China College of Chemistry and Molecular Engineering Qingdao University of Science and TechnologyKey Laboratory of Eco-chemical EngineeringKey Laboratory of Optic-electric Sensing and Analytical Chemistry of Life ScienceTaishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and TechnologyQingdao 266042China College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042China

At present,Ru dopants mainly enhance electrocatalytic performance by inducing strain,vacancy,local electron difference,and ***,this work innovatively proposes that trace Ru atoms induce dual-reconstruction of phosphide by regulating the electronic configuration and proportion of Co–P/Co–O species,and ultimately activate superb electrocatalytic ***,Ru-CoFeP@C/nickel foam(NF)is reconstructed to generate hydrophilic Co(OH)_(2)nanosheets during the hydrogen evolution reaction(HER)process,further accelerating the alkaline HER kinetics of *** the as-formed CoOOH during the oxygen evolution reaction(OER)process directly accelerates the oxygen overflow *** expected,the overpotential at 100 mA·cm^(−2)(η100)values of the reconstructed Ru-CoFeP@C/NF are 0.104 and 0.257 V for HER and OER,which are greatly lower than that of Pt/C-NF and RuO_(2)-NF benchmarks,*** work provides guidance for the construction of highperformance catalysts for HER and OER dual *** work provides a new idea for the optimization of catalyst structure and electrocatalytic performance.

关键词： Ru doping dual reconstruction overall water splitting phosphide Ru-CoFeP@C/nickel foam(NF)

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Cobalt single-atom catalyst tailored ceramic membrane for selective removal of emerging organic contaminants

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environmental science and Ecotechnology 2024年第5期21卷 219-229页

作者： Jiaxuan Yang Jing Zhao Hesong Wang Yatao Liu Junwen Ding Tianyi Wang Jinlong Wang Han Zhang Langming Bai Heng Liang State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin150090PR China Beijing Key Laboratory for Source Control Technology of Water Pollution College of Environmental Science and EngineeringBeijing Forestry UniversityBeijing100083PR China

Water reuse is an effective way to solve the issues of current wastewater increments and water resource ***,a promising method for water reuse,has the characteristics of low energy consumption,easy operation,and high adaptability to coupling with other water treatment ***,emerging organic contaminants(EOCs)in municipal wastewater cannot be effectively intercepted by ultrafiltration,which poses significant challenges to the effluent quality and sustainability of ultrafiltration ***,we develop a cobalt single-atom catalyst-tailored ceramic membrane(Co1-NCNT-CM)in conjunction with an activated peroxymonosulfate(PMS)system,achieving excellent EOCs degradation and anti-fouling *** interfacial reaction mechanism effectively mitigates membrane fouling through a repulsive interaction with natural organic *** generation of singlet oxygen at the Co-N3-C active sites through a catalytic pathway(PMS/PMS*/OH*/O*/OO*/1 O_(2))exhibits selective oxidation of phenols and sulfonamides,achieving>90%removal *** findings elucidate a multi-layered functional architecture within the Co1-NCNT-CM/PMS system,responsible for its superior performance in organic decontamination and membrane maintenance during secondary effluent *** highlights the power of integrating Co1-NCNT-CM/PMS systems in advanced wastewater treatment frameworks,specifically for targeted EOCs removal,heralding a new direction for sustainable water management.

关键词： Single-atom catalytic ceramic membrane Peroxymonosulfate activation Selective oxidation Interfacial response Multi-layer functional zones

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Realizing impressive superplasticity in a low-alloyed Mg-Zn-Ca-Al-Mn alloy:The roles of grain boundary segregation and denseβ-Mn particles

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Journal of Magnesium and Alloys 2024年第10期12卷 4085-4095页

作者： Tian-Shuai Wang Zhen-Ming Hua Cheng Wang Min Zha Yipeng Gao Hui-Yuan Wang Key Laboratory of Automobile Materials of Ministry of Education&School of Materials Science and Engineering Nanling CampusJilin UniversityNo.5988 Renmin StreetChangchun 130025PR China International Center of Future Science Jilin UniversityChangchun 130012PR China State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Material Science and EngineeringHebei University of TechnologyTianjin 300130PR China

Achieving impressive superplasticity is an important strategy to manufacture Mg alloy products with complex *** the present study,we report that an excellent superplastic deformation with elongation larger than 500%can be achieved at 623 K and 1.0×10^(−3)s^(−1)in a Mg-1.51Zn-0.59Ca-0.59Al-0.70Mn(wt.%,ZXAM2111)alloy fabricated by equal-channel angular *** superplastic deformation is mainly carried by grain boundary sliding(GBS),accompanied by a grain size growth from∼3.0μm to∼6.0μm after *** deformation,the ZXAM2111 alloy is mainly characterized by a strong co-segregation of Zn and Ca atoms at grain boundaries and uniformly distributedβ-Mn *** deformation proceeding,theβ-Mn particles further dynamically precipitate along grain boundaries that parallel the tensile axis,leading to improved resistance to grain *** the enhanced stabilizing effects decrease the strain rate sensitivity value,the resulting impressive microstructure stability provides a cornerstone of the active operation of GBS,facilitating the achievement of superplastic *** present work could provide insight into developing low-alloyed Mg alloys with high microstructure thermal stability to achieve superplasticity.

关键词： Magnesium alloys Superplasticity Solute segregation Thermal stability Grain boundary sliding

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High-gain signal-on PEDOT:PSS organic photoelectrochemical transistor biosensing modulated by a MXene/MOFs/NiO Schottky heterojunction

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science China Chemistry 2023年第2期66卷 578-585页

作者： Zheng Li Yi-Tong Xu Jin Hu Ting Wang Fang-Qing Liu Hong Zhou Guang-Xu Chen Peng Lin Wei-Wei Zhao Jing-Juan Xu Hong-Yuan Chen State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical EngineeringNanjing UniversityNanjing210023China Shenzhen Key Laboratory of Special Functional Materials&Guangdong Research Center for Interfacial Engineering of Functional Materials College of Materials Science and EngineeringShenzhen UniversityShenzhen518060China Shandong Key Laboratory of Biochemical Analysis College of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao266042China School of Environment and Energy State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Atmospheric Environment and Pollution ControlSouth China University of TechnologyGuangzhou510006China

Herein we report a high-gain signal-on poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)(PEDOT:PSS)organic electrochemical transistor(OECT)biosensing using an accumulation-mode PEDOT:PSS OECT modulated by a light-fueled MXene/MOFs/Ni O Schottky *** such a system,the MXene/MOFs/Ni O Schottky heterojunction exhibited superior gating effect,as it not only enabled the fast-directional charge transfer but also guaranteed the maximal accessibility of the electrolyte to topped 2D MXene with large surface *** linkage with a bi-enzyme cascade system,the quinone derivatives produced by the cascade reaction of alkaline phosphatase(ALP)and tyrosinase(TYR)could serve as effective electron acceptors for the representative Ti_(3)C_(2)/PCN-224/Ni O heterojunction,underpinning an innovative method for sensitive detection of ALP activity with a low detection limit of 0.001 U L^(-1).Remarkably,the as-developed system demonstrated a remarkable current gain as high as near 10^(4),which to our knowledge is the highest one among existing OECT biosensory *** work represents a generic protocol to develop the novel signal-on PEDOT:PSS OECT platform towards biochemical detection and beyond.

关键词： signal-on PEDOT:PSS organic electrochemical transistor biosensing Schottky heterojunction

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Molecular template derived ultrathin N-doped carbon layer on cobalt selenide nanobelts for durable and rapid sodium storage

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Nano Research 2024年第9期17卷 8145-8154页

作者： Chuanliang Wei Baojuan Xi Kangdong Tian Xinlu Zhang Quanyan Man keyan Bao Wutao Mao Jinkui Feng Shenglin Xiong Key Laboratory of the Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringSchool of Materials Science and EngineeringShandong UniversityJinan 250100China Resource Environment and Clean Energy Laboratory School of Chemical and Environmental EngineeringJiangsu University of TechnologyChangzhou 213001China

Sodium-ion batteries(SIBs)are an attractive battery system because of similar characteristics to lithium-ion batteries(LIBs)and large Na element ***,exploring stable,high-capacity and high-rate anode materials for SIBs is still challenging ***,diethylenetriamine(DETA)molecular template derived ultrathin N-doped carbon(NC)layer decorated CoSe_(2)nanobelts(CoSe_(2)/NC)are prepared by solvothermal reaction followed by calcination *** CoSe_(2)/NC exhibits large potential as an anode for *** and theoretical calculations reveal that the in situ formed conductive ultrathin NC layer can not only relieve the volume change of CoSe_(2)but also accelerate electron and ion *** addition,the nanobelt structure of CoSe_(2)/NC with abundant exposed active sites can obviously accelerate the electrochemical *** the synergistic effect of special nanobelt structure and NC layer,the rate as well as cycling performances of CoSe_(2)/NC are obviously improved.A superior capacity retention of 94.8%is achieved at 2 A·g^(-1)after 2000 *** using Na3V2(PO4)3 cathodes,the pouch full batteries can work steadily at 0.5 C,verifying the application ***_(2)/NC anodes also exhibit impressive performances in LIBs and potassium-ion batteries(PIBs).

关键词： CoSe2 nanobelts ultrathin N-doped carbon layer sodium-ion batteries anode high rate

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Photophysics of metal-organic frameworks:A brief overview

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Chinese Physics B 2024年第1期33卷 122-133页

作者：刘晴硕余俊宏胡建波 State Key Laboratory for Environment-Friendly Energy Materials Southwest University of Science and TechnologyMianyang 621010China Laboratory for Shock Wave and Detonation Physics Institute of Fluid PhysicsChina Academy of Engineering PhysicsMianyang 621900China

Metal-organic frameworks(MOFs),which are self-assembled porous coordination materials,have garnered considerable attention in the fields of optoelectronics,photovoltaic,photochemistry,and photocatalysis due to their diverse structures and excellent ***,the performance of MOF-based optoelectronic applications currently falls short of the industry *** enhance the performance of MOF materials,it is imperative to undertake comprehensive investigations aimed at gaining a deeper understanding of photophysics and sequentially optimizing properties related to photocarrier transport,recombination,interaction,and *** utilizing femtosecond laser pulses to excite MOFs,time-resolved optical spectroscopy offers a means to observe and characterize these ultrafast microscopic *** approach adds the time coordinate as a novel dimension for comprehending the interaction between light and ***,this review provides a comprehensive overview of the recent advancements in the photophysics of MOFs and additionally outlines potential avenues for exploring the time domain in the investigation of MOFs.

关键词： metal-organic framework(MOF) ultrafast spectroscopy photophysics carrier dynamics

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Preface to the special topic on metals and their compounds for lithium ion/metal batteries

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Tungsten 2024年第1期6卷 162-163页

作者： Ying-Ze Song Wen-Long Cai Gao-Ran Li State Key Laboratory of Environment-Friendly Energy Materials Southwest University of Science and TechnologyMianyang 621010China College of Materials Science and Engineering Sichuan UniversityChengdu 610064China School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China

The fast development of electronics and electric devices has inspired the practical application of lithium ion/metal *** this line,the metals and their compounds as electrode materials as well as the corresponding mechanism for energy storage have gained extensive international *** as-organized special topic focuses on W,Mo,Co,Zr,Hf,Re,Ta,Nb,V-based metals and their compounds for lithium ion/metal *** special topic involves four reviews and four research papers totally,providing the latest advances of transition metals and their related compounds for rechargeable lithium ion/metal batteries.

关键词： lithium metals gained

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