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Bioinspired nanocomposites with self-adaptive mechanical properties

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nano Research 2024年第2期17卷 633-648页

作者： Grant Kitchen Bohan sun sung Hoon kang 13400 n Charles St Department of Materials Science and EngineeringJohns Hopkins UniversityBaltimore 21218USA 23400 n Charles St Department of Mechanical EngineeringJohns Hopkins UniversityBaltimore 21218USA 33400 n Charles St Hopkins Extreme Materials InstituteJohns Hopkins UniversityBaltimore 21218USA

Conventional synthetic materials have fixed mechanical properties and suffer defects,damage,and degradation over *** makes them unable to adapt to changing environm.nts and leads to limited ***,self-adaptive materials inspired by natural materials have emerged as a solution to address these *** the ability to change their mechanical properties based on changing mechanical environm.nts,repairing defects,and maintaining their mechanical properties,these materials can lead to improved perform.nce while decreasing *** this review,we explore self-adaptive phenom.na found in nature that have inspired the developm.nt of synthetic self-adaptive materials,and the mechanisms that have been employed to create the next generation of *** potential applications of these materials,the challenges that existing approaches face,and future research opportunities are also discussed.

关键词： nanocomposites self-adaptive materials bioinspired materials force-activated resilience

natural marmatite photocatalyst for treatm.nt of m.neral processing wastewater to help zero wastewater discharge

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Journal of Environm.ntal Sciences 2024年第8期142卷 83-91页

作者： meirong Wu Wei sun Xiangsong m.ng Jianhua kang Yue Yang School of m.nerals Processing and Bioengineering Central South UniversityChangsha 410083China Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing m.neral Resources Central South UniversityChangsha 410083China

m.neral processing wastewater(mPW)with large discharge and high toxicity affects environm.ntal safety,and the realizing zero discharge of mPW is of great significance for reducing environm.ntal pollution,saving water resources,and promoting the sustainable developm.nt of the m.ning *** this study,we reported natural marmatite(nm)as a low-cost and efficient photocatalyst for the treatm.nt of mPW to help zero wastewater *** photocatalytic activity of nm was evaluated by the removal of total organic carbon(TOC)from mPW under visible-light illum.nation,and the optimal degradation conditions were *** showed that superoxide free radicals(^(·)O_(2)^(-))were the dom.nant active species responsible for organic pollutants degradation,and 74.25%TOC removal was obtained after 120 m.n reaction under the optimum treatm.nt ***,the wastewater treated by nm photocatalysis can be reused in the flotation system without adverse impact on the product *** on these findings,a model of zero wastewater discharge for flotation with the help of photocatalytic treatm.nt was established,it indicated that the water of the whole system can be balanced without affecting the ore dressing index,which showed that visible light-driven photocatalyst has a promising application prospect in the treatm.nt and recycling of industrial wastewater.

关键词： natural m.neral Photocatalysis Industrial wastewater Wastewater recycling Water balance

Stress Concentration Effect in Interface Between Conductor and Epoxy Resin in Coaxial Components of Power Equipm.nt

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CSEE Journal of Power and Energy Systems 2024年第1期10卷 412-420页

作者： Chuang Wang kang Lei Qing sun Hui Li Jiawei Zhang Lang Zhao Zongren Peng School of Electrical Engineering Xi’an University of TechnologyXi’an 710054China Xi’an Power Supply Company State Grid Shaanxi Electric Power CompanyXi’an 710032China State Key Laboratory of Electrical Insulation and Power Equipm.nt Xi’an Jiaotong UniversityXi’an 710049China

The spacer used in gas insulated switchgear(GIS)plays a vital role in its safe *** mismatch of mechanical properties between conductor and insulating material in spacers results in stress concentration at the interface between *** a hydrostatic test,mechanical damages are often initiated from the *** this paper,the stress between alum.num conductors and epoxy resin is studied by using a simplified coaxial structure *** measurem.nt system and finite elem.nt simulation are used to explore the generation of stress and strain during curing and *** real-time measurem.nt of strain at the interface shows that the residual strain in the entire process is primarily generated during the cooling ***,the temperature and stress/strain distribution at the interface during the cooling stage are further studied,and combined with experim.nts and *** consistency between the finite elem.nt simulation and the experim.ntal measurem.nt results verifies the validity of the simulation method *** results show that the maximum of the first principal stress generated during the cooling stage of the production process is concentrated on the upper and lower edges of the interface which is critical to the impact of the production quality of the spacer.

关键词： Epoxy resin GIS interface stress/strain distribution

Lignin‐derived carbon with pyridine n‐B doping and a nanosandwich structure for high and stable lithium storage

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Carbon Energy 2024年第8期6卷 232-247页

作者： Dichao Wu Jiayuan Li Yuying Zhao Ao Wang Gaoyue Zhang Jianchun Jiang m.ngm.ng Fan kang sun Key Lab of Biomass Energy and material Jiangsu ProvinceNational Engineering Lab for Biomass Chemical UtilizationKey and Open Lab on Forest Chemical EngineeringSFAInstitute of Chemical Industry of Forest ProductsChinese Academy of ForestryNanjingChina Jiangsu Co‐Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and MaterialsCollege of Chemical EngineeringNanjing Forestry UniversityNanjingChina School of Energy and Environm.nt Southeast UniversityNanjingChina Departm.nt of Chemistry Tsinghua UniversityBeijingChina Fujian Provincial Key Laboratory of Biomass Low‐Carbon Conversion Academy of Advanced Carbon Conversion TechnologyHuaqiao UniversityXiamenChina Chinese Academy of Sciences Xinjiang Lihua Institute of Technology UrumqiChina

Biomass‐derived carbon is a promising electrode material in energy storage ***,how to improve its low capacity and stability,and slow diffusion kinetics during lithium storage remains a *** this research,we propose a“self‐assembly‐template”method to prepare B,n codoped porous carbon(Bn‐C)with a nanosandwich structure and abundant pyridinic n‐B *** nanosandwich structure can increase powder density and cycle stability by constructing a stable solid electrolyte interphase film,shortening the Li^(+)diffusion pathway,and accommodating volume expansion during repeated charging/*** abundant pyridinic n‐B species can simultaneously promote the adsorption/desorption of Li^(+)/PF_(6)^(−)and reduce the diffusion *** Bn‐C electrode showed a high lithium‐ion storage capacity of above 1140 mAh g^(−1)at 0.05 A g^(−1)and superior stability(96.5%retained after 2000 cycles).moreover,owing to the synergistic effect of the nanosandwich structure and pyridinic n‐B species,the assembled symmetrical Bn‐C//Bn‐C full cell shows a high energy density of 234.7Wh kg^(−1),high power density of 39.38 kW kg−1,and excellent cycling stability,superior to most of the other cells reported in the *** the density functional theory simulation dem.nstrated,pyridinic n‐B shows enhanced adsorption activity for Li^(+)and PF_(6)^(−),which promotes an increase in the capacity of the anode and cathode,***,the relatively lower diffusion barrier of pyridinic n‐B promotes Li^(+)migration,resulting in good rate ***,this study provides a new approach for the synergistic modulation of a nanostructure and an active site simultaneously to fabricate the carbon electrode material in energy storage devices.

关键词： high cycling stability high energy density lithium‐ion batteries pyridinic n‐B species sandwich structure carbon nanosheet

Co-doped ni_(3)S_(2) nanosheet array: A high-efficiency electrocatalyst for alkaline seawater oxidation

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nano Research 2024年第3期17卷 1050-1055页

作者： m.ng Yue Xun He Shengjun sun Yuntong sun mohamed S.Hamdy mhamed Benaissa Alsam.ni A.m.Salih Jun Liu Xuping sun College of Chemistry Chemical Engineering and Materials ScienceShandong Normal UniversityJinan 250014China Institute of Fundam.ntal and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China Departm.nt of Chemistry College of ScienceKing Khalid UniversityP.O.Box 9004Abha 61413Saudi Arabia Departm.nt of Chemical Engineering College of EngineeringUniversity of Ha’ilP.O.Box 2440Ha’il 81441Saudi Arabia Departm.nt of Otolaryngology-Head&neck Surgery West China HospitalSichuan UniversityChengdu 610041China

Developing efficient and durable oxygen evolution reaction(OER)catalysts holds great promise for green hydrogen production via seawater electrolysis,but remains a ***,we report a Co-doped ni_(3)S_(2) nanosheet array on ni foam(Co-ni_(3)S_(2)/nF)as a high-efficiency OER electrocatalyst for *** alkaline conditions,Co-ni_(3)S_(2)/nF requires an overpotential of only 368 mV to drive 100 mA·cm^(–2),superior to ni_(3)S_(2)/nF(385 mV).Besides,it exhibits at least 50-h continuous electrolysis.

关键词： Co doping ni_(3)S_(2)nanosheet array oxygen evolution reaction seawater electrolysis electrocatalyst

neural Wiskott-Aldrich syndrome protein(n-WASP)promotes distant metastasis in pancreatic ductal adenocarcinoma via activation of LOXL2

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Oncology Research 2024年第4期32卷 615-624页

作者： HYUnG sun KIm YUn sun LEE SEUnG mYUnG DOnG HYO JUnG KIm DA EUn LEE HYEOn WOOnG kang mYEOnG JIn KIm JOOn SEOnG PARK Departm.nt of Surgery Gangnam Severance HospitalYonsei University College of MedicineSeoulKorea Departm.nt of Surgery Graduate School of Medical ScienceBrain Korea 21 ProjectYonsei University College of MedicineSeoulKorea Gibiome Co. Ltd.Gyeonggi-doKorea

Pancreatic ductal adenocarcinoma(PDAC)is one of the most aggressive solid malignancies.A specific mechanism of its metastasis has not been *** this study,we investigated whether neural Wiskott-Aldrich syndrome protein(n-WASP)plays a role in distant metastasis of *** found that n-WASP is markedly expressed in clinical patients with *** analysis showed a notably more distant metastatic pattern in the n-WASP-high group compared to the n-WASP-low group.n-WASP was noted to be a novel mediator of epithelialmesenchymal transition(EmT)via gene expression profile *** of n-WASP in pancreatic cancer cells significantly inhibited cell invasion,migration,and *** also observed positive association of lysyl oxidase-like 2(LOXL2)and focal adhesion kinase(FAK)with the n-WASP-mediated response,wherein EmT and invadopodia function were *** n-WASP and LOXL2 depletion significantly reduced the incidence of liver and lung metastatic lesions in orthotopic mouse models of pancreatic *** results elucidate a novel role for n-WASP signaling associated with LOXL2 in EmT and invadopodia function,with respect to regulation of intercellular comm.nication in tumor cells for promoting pancreatic cancer *** findings may aid in the developm.nt of therapeutic strategies against pancreatic cancer.

关键词： Pancreatic cancer neural Wiskott-Aldrich syndrome protein(n-WASP)signaling metastasis Epithelial-mesenchymal transition(EmT) Lysyl oxidase-like 2(LOXL2)

multifunctional SnO_(2) QDs/mXene Heterostructures as Lam.nar Interlayers for Improved Polysulfide Conversion and Lithium Plating Behavior

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nano-micro Letters 2024年第11期16卷 156-169页

作者： Shungui Deng Weiwei sun Jiawei Tang mohammad Jafarpour Frank nüesch Jakob Heier Chuanfang Zhang College of materials Science and Engineering Sichuan UniversityChengdu 610065People’s Republic of China Laboratory for Functional Polymers Swiss Federal Laboratories for Materials Science and Technology(EMPA)Überlandstrasse 1298600 DübendorfSwitzerland Institute of materials Science and Engineering Ecole Polytechnique Fédérale de Lausanne(EPFL)Station 121015 LausanneSwitzerland Key Laboratory of Quantum materials and Devices of m.nistry of Education School of PhysicsSoutheast UniversityNanjing 211189People’s Republic of China SEU‑FEI nano‑Pico Center Key Laboratory of MEMS of Ministry of EducationSoutheast UniversityNanjing 210096People’s Republic of China

Poor cycling stability in lithium–sulfur(Li–S)batteries necessitates advanced electrode/electrolyte design and innovative interlayer *** catalysis has emerged as a promising approach,leveraging the adsorption and catalytic perform.nce on lithium polysulfides(LiPSs)to inhibit LiPSs shuttling and improve redox *** this study,we report an ultrathin and lam.nar SnO_(2)@mXene heterostructure interlayer(SnO_(2)@mX),where SnO_(2) quantum dots(QDs)are uniformly distributed across the mXene *** combined structure of SnO_(2) QDs and mXene,along with the creation of numerous active boundary sites with coordination electron environm.nts,plays a critical role in m.nipulating the catalytic kinetics of sulfur *** Li–S cell with the SnO_(2)@mX-modified separator not only dem.nstrates superior electrochemical perform.nce compared to cells with a bare separator but also induces homogeneous Li deposition during *** a result,an areal capacity of 7.6 mAh cm^(-2) under a sulfur loading of 7.5 mg cm^(-2) and a high stability over 500 cycles are *** work dem.nstrates a feasible strategy of utilizing a lam.nar separator interlayer for advanced Li–S batteries awaiting commercialization and may shed light on the understanding of heterostructure catalysis with enhanced reaction kinetics.

关键词： Lithium-sulfur battery Heterogeneous catalysis Heterostructure Redox kinetics Lithium dendrites

CD200Rhigghh neutrophils with dysfunctional autophagy establish systemic imm.nosuppression by increasing regulatory T cells

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Cellular & molecular Imm.nology 2024年第4期21卷 349-361页

作者： Ye Seon Kim Yu sun Jeong Geon Ho Bae Ji Hyeon kang m.ngyu Lee Brian A.Zabel Yoe-Sik Bae Departm.nt of Biological Sciences Sungkyunkwan UniversitySuwon16419Republic of Korea Departm.nt of Health Science and Technology SAIHSTSungkyunkwan UniversitySeoul06351Republic of Korea Palo Alto Veterans Institute for Research Veterans Affairs HospitalPalo AltoCA94304USA

Distinct neutrophil populations arise during certain pathological *** generation of dysfunctional neutrophils during sepsis and their contribution to septicemia-related systemic imm.ne suppression remain *** this study,using an experim.ntal sepsis model that features imm.nosuppression,we identified a novel population of pathogenic CD200R^(high) neutrophils that are generated during the initial stages of sepsis and contribute to systemic imm.ne suppression by enhancing regulatory T(T_(reg))*** to their CD200R^(low)counterparts,sepsis-generated CD200Rhigh neutrophils exhibit impaired autophagy and dysfunction,with reduced chemotactic migration,superoxide anion production,and TnF-α*** soluble CD200 blocks autophagy and neutrophil maturation in the bone marrow during experim.ntal sepsis,and recombinant CD200 treatm.nt in vitro can induce neutrophil dysfunction similar to that observed in CD200R^(high) *** adm.nistration of anα-CD200R antibody effectively reversed neutrophil dysfunction by enhancing autophagy and protecting against a secondary infection challenge,leading to increased *** analysis revealed that CD200R^(high) neutrophils expressed high levels of Igf1,which elicits the generation of Treg cells,while the adm.nistration of anα-CD200R antibody inhibited Treg cell generation in a secondary infection *** together,our findings revealed a novel CD200R^(high) neutrophil population that mediates the pathogenesis of sepsis-induced systemic imm.nosuppression by generating Treg cells.

关键词： Sepsis neutrophils CD200R Autophagy IGF-1 Regulatory T cells

Enhanced Photocatalytic CO_(2) Reduction via Linkage Substitution in Porphyrinic Covalent Organic Frameworks

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CCS Chemistry 2024年第7期6卷 1689-1697页

作者： Sulem.n Sulem.n kang sun Yim.ng Zhao Xinyu Guan Zhongyuan Lin Zheng m.ng Hai-Long Jiang Departm.nt of Chemistry University of Science and Technology of ChinaHefeiAnhui 230026

A catalytic perform.nce is greatly impacted by the microenvironm.nt surrounding the catalytic ***,efforts to modify the microenvironm.nt are primarily directed towards the first coordination spheres,while controlling the secondary coordination spheres is entirely *** this work,a series of porphyrin-based covalent organic frameworks(COFs)with distinct linkage were rationally designed to investigate the structure-property relationship between the secondary coordination spheres of catalytic centers and CO_(2) *** secondary coordination spheres of COFs could be changed readily by m.nipulating the organic *** photocatalytic CO_(2) reduction,the COF withβ-ketoenam.ne as the linkage(niPor-BDOB)exhibited superior activity,selectivity,and stability over its im.ne-linked counterpart(niPor-BDA).Experim.nts and theoretical calculations indicated that the distinct secondary coordination sphere resulted in an electronic density change of ni centers,leading to enhanced photocatalytic *** study highlights the significance of controlling the secondary coordination sphere around the active site.

关键词： covalent organic frameworks linkage substitution photocatalysis CO_(2)reduction activity selectivity