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MOF-derived Cu embedded into N-doped mesop.r.us carbon as a robust supp.r. of pdAu nanocatalysts for ethanol electrooxidation

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rare Metals 2024年第3期43卷 1083-1094页

作者： Yu-Fu huang peng wu Jun-ping Tang Jian Yang Jing Li Shuai Chen Xue-Ling Zhao ChengChen Bin-Wei Zhang Yan-Yun Ma Wei-Heng Shi Dong-Hai Lin Shi-Gang Sun School of Energy and materials Shanghai Engineering Research Center of Advanced Thermal Functional MaterialsShanghai Key Laboratory of Engineering Materials Application and EvaluationShanghai Polytechnic UniversityShanghai201209China State Key Laboratory of physical Chemistry of Solid Surfaces Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China School of Chemistry and Chemical engineering Chongqing UniversityChongqing401331China Center of Advanced Energy Technology and Electrochemistry Institute of Advanced Interdisciplinary StudiesChongqing UniversityChongqing400044China Institute of Functional Nano&Soft materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou215123China Dep.r.ment of materials science and {3. Drexel UniversityPhiladelphiaPA19104USA

Metal-organic frameworks(MOFs)h ave attracted widespread attention due to their large surface area and p.r.us *** designing the nanostructures of MOFs to promote their application in ethanol electrooxidation is still a ***,a novel Cu-NCNs(Cu-nitrogen-doped carbon nanotubes)supp.r. was synthesized by p.r.lysis of melamine(MEL)and Cu-ZIF-8 together,and then,pd-Au nanoalloys were loaded by sodium borohydride reduction method to prep.r. pdAu@Cu-NCNs *** generating mesop.r.us carbon with high specific surface area and favorable electron and mass transp.r. can be used as a potential excellent carrier for pdAu *** addition,the balance of catalyst composition and surface structure was tuned by controlling the content of pd and ***,the best-p.r.ormed pd_(2)Au_(2)@Cu-NCN-1000-2(where 1000 means the carrier calcination temp.r.ture,and 2 means the calcination constant temp.r.ture time)catalyst exhibits better long-term stability and electrochemical activity for ethanol oxidation in alkaline media(4.80 A·mg^(-1)),which is 5.05 times higher than that of commercial pd/C(0.95 A·mg^(-1)).Therefore,this work is beneficial to further promoting the application of MOFs in direct ethanol fuel cells(DEFCs)and can be used as insp.r.tion for the design of more efficient catalyst supp.r. structures.

关键词： Metal-organic frameworks(MOFs) N-doped Mesop.r.us carbon pdAu Ethanol electrooxidation

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3.-structured carbon nanotube fibers as ultra-robust fabrics for adaptive electromagnetic shielding

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Nano research 2024年第9期17卷 8521-8530页

作者： Dongping Li ping Wang Yuanyuan Li Zhenzhong Yong Kunjie wu Yan Zhang Jin Wang Dongmei Hu Key Laboratory of Multifunctional and Smart Systems Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China college of Textile and Clothing engineering of Soochow university Suzhou 215021China

Wireless communication technology is indispensable in our daily lives,but it also results in serious electromagnetic radiation ***,developing smart electromagnetic interference shielding materials with adjustable electromagnetic wave(EMW)responses holds significant promise for future electromagnetic shielding *** this study,we propose an electromagnetic shielding switch(ESS)characterized by tunable electromagnetic shielding p.r.ormance achieved by fabricating a three-dimensional(3.)carbon nanotube-based spacer fabric(CNT-SF)and modifying CNT-SF with chemical vap.r.deposition(CCNT-SF).The CCNT-SF displays direction-dependent electrical conductivity by manipulating the warp and weft density,measuring 128 S/m transversely and 447 S/m *** characteristic allows the CCNT-SF to transmit or shield EMW by adjusting the angle of EMW incidence through fabric rotation,resulting in anisotropic electromagnetic shielding p.r.ormance(3. dB transversely and 87 dB vertically).This feature enables switchable shielding with an on/off ratio of ***,the unique 3. structure confers excellent mechanical prop.r.ies on the fabric,with compressive strength reaching 120 *** a flexible,lightweight,and mechanically robust ESS,the CCNT-SF holds promising prospects for mitigating the challenges of increasingly severe and intricate electromagnetic environments.

关键词： carbon nanotube spacer fabric electromagnetic shielding impact resistance joule heating electromagnetic shielding switch

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A bifunctional wood membrane modified by MoS_(2)/covalent organic framework heterojunctions for effective solar-driven water evap.r.tion and contaminant degradation

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science china Chemistry 2024年第6期67卷 2111-2120页

作者： Ziwei Cui Jianfei wu Haoran Li Yaning Xu Tiantian wu Lixing Kang Qing huang Yahui Cai Jianzhang Li Dan Tian Co-Innovation Center of Efficient processing and Utilization of Forest resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing210037China Key Laboratory of Multifunctional Nanomaterials and Smart Systems Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou215123China State Key Laboratory of Efficient production of Forest resources Beijing Forestry UniversityBeijing100083China

Interfacial solar evap.r.tion technology is considered one of the most promising strategies for alleviating the scarcity of freshwater ***,solar-driven evap.r.tion technology cannot eliminate the pollutants in the residual *** solve this problem,we have prep.r.d a two-in-one solar-driven evap.r.tion/photocatalysis system by decorating MoS_(2)/covalent organic framework(COF)heterojunctions on wood(MoS_(2)/COF-wood).Thanks to the unique p.r.us structure of wood,it provides a strong guarantee for water transp.r. and vap.r.release during the evap.r.tion *** introduction of MoS_(2) and COFs can promote the breaking of hydrogen bonds between water molecules,which leads to a significant decrease in the enthalpy of evap.r.tion,achieving a water evap.r.tion rate as high as 2.17 kg m^(-2)h^(-1)under 1 sun ***,the resulting MoS_(2)/COF-wood exhibits good salt resistance and *** addition,the heterojunctions formed between COFs and MoS_(2) can effectively inhibit charge carrier complexation and improve the photocatalytic degradation ability of pollutants(over 99%).This study highlights the construction strategy of bifunctional wood-based materials for freshwater production and wastewater remediation.

关键词： covalent organic framework MoS_(2) wood photocatalysis solar-driven evap.r.tion

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The marriage of immunomodulatory,angiogenic,and osteogenic capabilities in a piezoelectric hydrogel tissue engineering scafold for military medicine

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Military Medical research 2024年第3期11卷 323-344页

作者： ping wu Lin Shen Hui-Fan Liu Xiang-Hui Zou Juan Zhao Yu huang Yu-Fan Zhu Zhao-Yu Li Chao Xu Li-Hua Luo Zhi-Qiang Luo Min-Hao wu Lin Cai Xiao-Kun Li Zhou-Guang Wang Key Laboratory of Imaging Diagnosis and Minimally Invasive Intervention research the Fifth Affiliated Hospital of Wenzhou Medical UniversityLishui 323000ZhejiangChina Oujiang Laboratory(Zhejiang Lab for regenerative Medicine Vision and Brain Health)School of Pharmaceutical ScienceWenzhou Medical UniversityWenzhou 325000ZhejiangChina Dep.r.ment of Spine Surgery and Musculoskeletal Tumor Zhongnan Hospital of Wuhan UniversityWuhan 430071China National engineering research Center for Nanomedicine College of Life Science and TechnologyHuazhong University of Science and TechnologyWuhan 430074China Dep.r.ment of Overseas Education college Jimei UniversityXiamen 361021FujianChina School and Hospital of Stomatology Wenzhou Medical UniversityWenzhou 325035ZhejiangChina

Background:Most bone-related injuries to grassroots troops are caused by training or accidental *** establish preventive measures to reduce all kinds of trauma and improve the combat effectiveness of grassroots troops,it is imp.r.tive to develop new strategies and scafolds to promote bone ***:In this study,a p.r.us piezoelectric hydrogel bone scafold was fabricated by incorp.r.ting polydopamine(pDA)-modified ceramic hydroxyapatite(pDA-hydroxyapatite,pHA)and pDA-modified barium titanate(pDABaTiO_(3.,pBT)nanop.r.icles into a chitosan/gelatin(Cs/Gel)*** physical and chemical prop.r.ies of the Cs/Gel/pHA scafold with 0–10 wt%pBT were *** and animal exp.r.ments were p.r.ormed to characterize the immunomodulatory,angiogenic,and osteogenic capabilities of the piezoelectric hydrogel scafold in vitro and in ***:The incorp.r.tion of BaTiO_(3. into the scafold improved its mechanical prop.r.ies and increased self-generated *** to their endogenous piezoelectric stimulation and bioactive constituents,the prep.r.d Cs/Gel/pHA/pBT hydrogels exhibited cytocompatibility as well as immunomodulatory,angiogenic,and osteogenic capabilities;they not only effectively induced macrophage polarization to M2 phenotype but also promoted the migration,tube formation,and angiogenic differentiation of human umbilical vein endothelial cells(HUVECs)and facilitated the migration,osteodifferentiation,and extracellular matrix(ECM)mineralization of MC3.3.E1 *** in vivo evaluations showed that these piezoelectric hydrogels with versatile capabilities significantly facilitated new bone formation in a rat large-sized cranial injury *** underlying molecular mechanism can be p.r.ly attributed to the immunomodulation of the Cs/Gel/pHA/pBT hydrogels as shown via transcriptome sequencing analysis,and the pI3./Akt signaling axis plays an imp.r.ant role in regulating macrophage M2 ***:The piezoelectric Cs/Gel/pHA/pBT hy

关键词： piezoelectric hydrogel Tissue engineering scafold Immunomodulation Angiogenesis Osteogenic differentiation

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Mop nanop.r.icles encapsulated in N-doped carbon nanotubes as sulfur host for advanced lithium-sulfur batteries

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Nano research 2024年第4期17卷 2736-2745页

作者： Guozhi wu Shanqing Li Zheng Chen Ajiao Sun Jie Yang Sang Woo Joo Jiarui huang Key Laboratory of Functional Molecular Solids of the Ministry of Education Anhui Laboratory of Molecule-Based MaterialsCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241002China Anhui engineering research Center of Highly reactive Micro-Nano powders School of Materials and Environmental engineeringChizhou UniversityChizhou 247000China School of Mechanical engineering Yeungnam UniversityGyeongsanGyeongbuk 38541Republic of Korea

The low electrical conductivity of sulfur,strong volume expansion,shuttle effect,and sluggish redox reactions in Li-S batteries limit their practical *** nanop.r.icles encapsulated in nitrogen-doped carbon nanotubes(Mop/NC NTs)were synthesized using MoO_(3. nanorods as templates via a polyp.r.ole coating,heat-carbonization,MoO_(3. p.r.ial reduction,ammonia washing,and *** Mop/NC NTs had a hollow nanostructure with a high specific surface area,which can alleviate the volume expansion of the cathode and the shuttle effect of *** encapsulated Mop nanop.r.icles can anchor the polysulfides and enhance the redox reaction ***,the Mop/NC NTs combined with sulfur(Mop/S/NC NTs)exhibited 440.8 mAh·g^(-1) over 500 cycles at 1.0 A·g^(-1) with a decay rate of 0.06%p.r.*** density functional theory calculations and X-ray photoelectron spectroscopy results confirmed that Mop/NC NTs could anchor polysulfides and alleviate the shuttle effect by chemical *** study supplies a novel route to prep.r. nanop.r.icle-embedded in N-doped carbon nanotubes for advanced Li-S battery.

关键词： Mop N-doped carbon nanotube lithium-sulfur battery cathode

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Bimagnetic metal constructed core-shell structure of Fe@Co nanowires for multi-band microwave absorption

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progress in Natural science:materials International 2024年第02期34卷 354-361页

作者： ping-an Yang rui Cai Haibo ruan Nanqing Zhang Xin huang rui Li Yuxin Zhang Yi Lu Zhihao Zhou School of Automation Chongqing University of Posts and Telecommunications Chongqing Key Laboratory of materials Surface & Interface science Chongqing University of Arts and Sciences college of engineering and Technology Zunyi Normal College college of Material science and engineering Chongqing University

Controlled fabrication of materials by surface modification techniques has been a hot research topic. In this pap.r.one-dimensional(1D) core-shell structure Fe@Co nanowires(NWs) were successfully prep.r.d by anchoring 0-dimensional(0D) Co nanop.r.icles on 1D Fe NWs based on the in situ reduction method. The electromagnetic p.r.meters of the specimens at a filler mass fraction of 25 wt% were tested and the microwave loss mechanism was deeply analyzed. Binary magnetic metals in a core-shell structure have excellent multi-band microwave absorption capability(S-band, X-band and Ku-band). This is due to the heterogeneous interface and magnetic coupling effects tuning the dielectric and magnetic loss. This study offers a workable plan for creating effective multi-band magnetic metal-based microwave absorbers.

关键词： Microwave absorption One-dimensional nanowires Core-shell structure Magnetic coupling Interface

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A radiative-Cooling Hierarchical Aligned p.r.us poly(vinylidene fluoride)Film by Freeze-Thaw-promoted Nonsolvent-Induced phase Sep.r.tion

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Chinese Journal of polymer science 2024年第7期42卷 976-983,I0009页

作者： Yiting Zhang Jiahui Sun Yufeng Wang Yunchen wu Chun huang Chao Zhang Tianxi Liu Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material EngineeringJiangnan UniversityWuxi214122China State Key Laboratory for Modification of Chemical Fibers and polymer materials College of Materials Science and EngineeringDonghua UniversityShanghai201620China

passive daytime radiative cooling(p.r.)is an innovative and sustainable cooling technology that holds immense potential for addressing the energy *** the numerous rep.r.s on radiative coolers,the design of a straightforward,efficient,and readily producible system remains a ***,we present the development of a hierarchical aligned p.r.us poly(vinylidene fluoride)(HAp-pVDF)film through a freeze-thaw-promoted nonsolvent-induced phase sep.r.tion *** film features oriented microp.r.us arrays in conjunction with random nanop.r.s,enabling efficient radiative cooling p.r.ormance under direct sunlight *** incorp.r.tion of both micro-and nano-p.r.s in the HAp-pVDF film results in a remarkable solar reflectance of 97%and a sufficiently high infrared thermal emissivity of 96%,facilitating sub-environmental cooling at 18.3. on sunny days and 13.1℃ on cloudy ***,the HAp-pVDF film also exhibits exceptional flexibility and *** calculations further confirm a radiative cooling power of 94.8 W·m^(-2)under a solar intensity of 1000W·m^(-2),demonstrating a p.r.ormance comp.r.ble to the majority of rep.r.ed radiative coolers.

关键词： Daytime radiative cooling Hierarchical p.r.sity pVDF p.r.us film Thermal insulation Nonsolvent-induced phase sep.r.tion

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High-static-low-dynamic stiffness isolator based on an electromagnetic negative stiffness spring with long linear stroke

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science china(Technological sciences) 2024年第3期67卷 740-752页

作者： YUAN ShuJin wu YaJun SONG Daiping pU HuaYan MOU LiSheng HOU Lei ZHAO JingLei LI Xueping LUO Jun wu Jie huang XiaoXu State Key Laboratory of Mechanical Transmissions Chongqing UniversityChongqing 400044China china Aerodynamics research and Development Center Mianyang 621000China college of materials science and {3. Chongqing UniversityChongqing 400044China

Negative stiffness mechanisms can improve low-frequency vibration isolation p.r.ormance and have been widely used in the vibration isolation of precision equipment. However, the negative stiffness mechanism usually introduces a nonlinear stiffness,resulting in a nonlinear response and worsening the vibration isolation p.r.ormance, especially under large amplitude *** this pap.r. an electromagnetic spring with linear negative stiffness(ESLNS) is proposed, in which the antagonistic amp.r. forces of the energized coils are used to generate negative stiffness within a long linear stroke. The magnetic field distribution is improved through the design of the magnetic circuit, thereby increasing the stiffness generation efficiency. The stiffness can be adjusted bidirectionally by current within the range of positive and negative stiffness. An electromagnetic stiffness model was established based on the equivalent magnetic circuit method. Exp.r.mental measurements verified the accuracy of the model and proved the linearity of the electromagnetic spring. A vibration isolator with high static and low dynamic stiffness(HSLDS) based on the ESLNS is designed and tested. The exp.r.mental results prove that the introduction of the ESLNS can effectively expand the isolation frequency band without changing the equilibrium position. Moreover, the vibration isolator with ESLNS does not produce nonlinear response. The proposed electromagnetic spring with linear negative stiffness extends the application range of HSLDS isolators to a large amplitude vibration environment.

关键词： linear negative stiffness mechanism low-frequency vibration isolation electromagnetic spring vibration control

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p.r.able hydrogel-based tri-channel fluorescence sensor array for visual detection of multiple explosives

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Nano research 2024年第7期17卷 6483-6492页

作者： Wenxing Gao Wenfeng Liu Saijin huang Lin Wang Yingying Jian Yutong Li Weiwei wu Li Shang State Key Laboratory of Solidification processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an 710072China School of Advanced materials and Nanotechnology Xidian UniversityXi'an 710126China Honors college Northwestern Polytechnical UniversityXi'an 710119China

The identification and detection of various types of explosives are essential for human health and environmental ***-based sensing ap.r.ach offers significant advantages in detecting multi-analytes simultaneously,thereby holding great potential in identifying multiple ***,we rep.r. a tri-channel fluorescence array composed of three distinct fluorescence probes based on gold nanoclusters and nicotinamide adenine dinucleotide with well-sep.r.ted emission *** the specific interactions of explosives with different fluorescent probes and the yielded response patterns,seven explosives can be successfully distinguished with 100%*** p.r.icular,the sensor array exhibits excellent p.r.ormance in the quantitative analysis of individual explosive and the differentiation of multiple explosive *** facilitate the field detection towards practical application,the tri-channel fluorescence array was further integrated with polymer *** fabricated p.r.able hydrogel-based array sensors can not only visually identify seven different explosives by their distinct fluorescence color change,but also enable quantitative detection based on linear discriminant analysis(LDA)together with a *** study illustrates the great potential of hydrogel-based fluorescence sensor array as robust sensors for explosives,which also holds significant promise for the development of p.r.able explosive devices towards practical application.

关键词： sensor array gold nanoclusters explosives fluorescence hydrogels

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Conversion-type anode chemistry with interfacial compatibility toward Ah-level near-neutral high-voltage zinc ion batteries

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National science review 2024年第7期11卷 226-238页

作者： Shan Guo Liping Qin Jia wu Zhexuan Liu Yuhao huang Yiman Xie Guozhao Fang Shuquan Liang School of materials science and engineering Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan ProvinceCentral South University college of Biological and Chemical engineering Guangxi University of Science and Technology Information and Network Center Central South University

High-voltage aqueous zinc ion batteries（AZIBs） with a high-safety near-neutral electrolyte is of great significance for practical sustainable application; however, they suffer from anode and electrode/electrolyte interfacial incompatibility. Herein, a conversion-type anode chemistry with a low anodic potential, which is guided by the Gibbs free energy change of conversion reaction, was designed for high-voltage near-neutral AZIBs. A reversible conversion reaction between ZnC2O4·2H2O p.r.icles and three-dimensional Zn metal networks well-matched in CH3.OOLi-based electrolyte was revealed. This mechanism can be universally validated in the battery systems with sodium or iodine ions. More imp.r.antly, a cathodic crowded micellar electrolyte with a water confinement effect was proposed in which lies the core for the stability and reversibility of the cathode under an op.r.ting platform voltage beyond 2.0 V, obtaining a capacity retention of 95% after 100 cycles. remarkably, the scientific and technological challenges from the coin cell to Ah-scale battery, sluggish kinetics of the solid-solid electrode reaction, capacity excitation under high loading of active material, and prep.r.tion complexities associated with large-area quasi-solid electrolytes,were explored, successfully achieving an 88% capacity retention under high loading of more than 20 mg cm-2and p.r.icularly a practical 1.1 Ah-level pouch cell. This work provides a path for designing low-cost, eco-friendly and high-voltage aqueous batteries.

关键词： zinc compound anode conversion reaction voltage regulation interfacial design pouch cell

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