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Tailoring synergetic catalytic interface of VPO/Ni_(2)P to boost hydrogen evolution under alkaline conditions

Journal of Energy Chemistry 2022年第2期31卷 674-680页

作者： Wenli Xu Qiqi Li Wenda Zhong Bing Sun Qiang Huang Xu Nan Yinhong Gao Yao Yang Qin Zhang Nianjun Yang Xuanke Li School of Chemistry and Chemical Engineering Wuhan University of Science and TechnologyWuhan 430081HubeiChina Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology Hunan UniversityChangsha 410082HunanChina Institute of Materials Engineering University of SiegenSiegen 57076Germany

Design of the catalyst for efficient water dissociation and hydrogen recombination is paramount in enhancement of the alkaline water electrolysis ***,we reported a delicate hierarchical(VO)_(2) P_(2)O_(7)-Ni_(2) P@NF(VPO-Ni_(2) P@NF)hybrid catalyst that operated efficiently in alkaline *** VPO and Ni_(2) P respectively act as the water dissociation promoter and the hydrogen recombination center,which synergistically propel water adsorption/dissociation and H intermediates *** resulting synergistic interfaces between VPO and Ni_(2) P are verified to afford the catalyst an outstanding performance for hydrogen evolution reaction in alkaline media with an overpotential of 154 mV at 10 mA cm^(-2),Tafel slope of 65 mV dec^(-1),and remarkable ***,the catalyst presents the potential for overall water *** work may shed fresh light on the high-performance electrocatalyst design and the application of VPO on water electrolysis.

关键词： Alkaline water electrolysis interface engineering (VO)_(2)P_(2)O_(7) Ni_(2)P

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Effect of Extrusion Combination Types on Microstructure and Mechanical Properties of the AZ31/GW103K Bimetallic Composite Plates

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Acta Metallurgica Sinica(English Letters) 2022年第12期35卷 1959-1972页

作者： Yunpeng Meng Boyu Lin Lifei Wang Jianfeng Fan Shangzhou Zhang Liwei Lu Hans Jφrgen Roven Hua Zhang Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China Institute for Advanced Studies in Precision Materials Yantai UniversityYantai 264005China Hunan Provincial Key Laboratory of High Efficiency and Precision Machining of Difficult-to-Cut Material Hunan University of Science and TechnologyXiangtan 411201China Department of Materials Science and Engineering Norwegian University of Science and Technology7491 TrondheimNorway

The AZ31/GW103 K bimetallic composite plates were prepared by co-extrusion of different combination types(sandwich extrusion type and double semicircle extrusion type),and effects of different extrusion combination types on the microstructure and mechanical properties of bimetallic composite plates were systematically *** results show that both the AZ31/GW103 K bimetallic composite plates prepared by different extrusion combination types have good metallurgical bonding,and changing the combination type does not affect the thickness of the interfacial transition layer of composite *** with the monolithic AZ31 and GW103 K extruded plates,co-extrusion can promote the dynamic recrystallization(DRX)of AZ31 and GW103 K components in composite plates,and double semicircular extrusion type has a better promotion effect on the DRX than sandwich extrusion *** addition,the texture of AZ31 in both monolithic AZ31 and AZ31/GW103 K/AZ31(A/G/A)plates is a typical(0002)basal texture,while that in the AZ31/GW103 K(A/G)composite plate shifts to the tangent direction(TD)of extruded *** with the monolithic AZ31 extruded plate,both the yield strength and tensile strength of A/G and A/G/A bimetallic composite plates are significantly *** strength of A/G/A composite plate is higher than that of A/G composite plate,but its elongation is ***,co-extrusion reduces the dislocation density of AZ31 and GW 103 K components in composite plates,and different extrusion combination types also affect the dislocation density.

关键词： Bimetallic composite plates Extrusion combination types Dynamic recrystallization Dislocation density Mechanical behavior

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一体化可拉伸的多功能电化学传感纤维构建微量汗液健康监测织物

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science China materials 2024年第1期67卷 251-260页

作者：张安宁周靓靓梁琦敏王欣胡晓康贾康康储宏伟罗勇锋丘龙斌彭慧胜何思斯 Shenzhen Key Laboratory of Flexible Printed Electronics Technology School of ScienceHarbin Institute of Technology(Shenzhen)Shenzhen 518055China Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen 518055China Hunan Province Key Laboratory of Materials Surface&Interface Science and Technology College of ScienceMaterial Science and Engineering SchoolCentral South University of Forestry and TechnologyChangsha 410004China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science and Laboratory of Advanced MaterialsFudan UniversityShanghai 200438China

透气舒适的传感纺织品可以检测人体汗液中的多种生物标记物,是在日常生活中实现全面健康监测的有效途径.然而,目前的可穿戴柔性电化学纺织品缺乏伸展性,这可能会导致信号不稳定或在移动过程中损坏设备.此外,这些纺织品对多种指示器的集... 详细信息

透气舒适的传感纺织品可以检测人体汗液中的多种生物标记物,是在日常生活中实现全面健康监测的有效途径.然而,目前的可穿戴柔性电化学纺织品缺乏伸展性,这可能会导致信号不稳定或在移动过程中损坏设备.此外,这些纺织品对多种指示器的集成度有限,需要较大的表面积和大量的汗液来激活传感器.在此,我们报告了一种一体化多功能电化学生物传感器纤维,该纤维具有可拉伸性,通过微量汗液即可检测汗液中的多种生物标志物.这种生物传感器是通过将多功能碳纳米管条带以螺旋状排列的方式负载在预先拉伸的聚合物纤维芯上从而充当微电极,并且两者之间具有稳定界面.此外,通过引入超亲水鞘层,提高了生物传感器的汗液捕获效率.该生物传感器能够同时监测pH、K^(+)、Na^(+)、葡萄糖、乳酸和尿酸六种生物标记物,300%的应变下表现出稳定的传感性能.仅需1μL的汗液即可启动对六种生物标记物进行高效检测.由此编织的织物传感系统可以连续、实时地监测多种生物标记信息,从而完成人体健康状况的评估.

关键词：生物传感器生物标记物人体健康状况健康监测聚合物纤维损坏设备伸展性微电极

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Plasmonically engineered light-matter interactions in Aunanoparticle/MoS_(2) heterostructures for artificial optoelectronic synapse

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Nano Research 2022年第4期15卷 3539-3547页

作者： Zhuoran Luo Yunfei Xie Ziwei Li Yajuan Wang Lihui Li Ziyu Luo Chenguang Zhu Xin Yang Ming Huang Jianhua Huang Delang Liang Xiaoli Zhu Dong Li Anlian Pan Key Laboratory for Micro-Nano Physics and Technology of Hunan Province College of Materials Science and EngineeringHunan UniversityChangsha 410082China State Key Laboratory of Artificial Microstructure&Mesoscopic Physics School of PhysicsPeking UniversityBeijing 100084China

Optoelectronic synaptic elements are emerging functional devices for the vigorous development of advanced neuromorphic computing technology in the post-Moore ***,optoelectronic devices based on transition metal dichalcogenides(TMDs)are limited to their poor mobilities and weak light-matter interactions,which still hardly exhibit superior device performances in the application of artificial ***,we demonstrate the successful fabrication of Au nanoparticle-coupled MoS_(2)heterostructures via chemical vapor deposition(CVD),where the light absorption of MoS_(2)is greatly enhanced and engineered by plasmonic *** electrons are excited from Au nanoparticles,and then injected into MoS_(2)semiconductors under the light *** plasmonically-engineered photo-gating effect at the metal-semiconductor junction is demonstrated to create optoelectronic devices with excellent synaptic behaviors,especially in ultra-sensitive excitatory postsynaptic current(EPSC,9.6×10^(-3)nA@3.4 nW·cm^(-2)),ultralow energy consumption(34.7 pJ),long-state retention time(>1,000 s),and tunable synaptic plasticity *** material system of Au-nanoparticles coupled TMDs presents unique advantages for building artificial synapses,which may lead the future development of neuromorphic electronics in optical information sensing and learning.

关键词： synapse optoelectronic device surface plasmon photo-gating MoS_(2)

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Interfacial optimization enabling reversible and stable aqueous zinc metal batteries under harsh conditions

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Journal of Central South University 2024年第12期31卷 4536-4548页

作者： SONG Ye-xin ZHONG Zi-yang CHEN Man-jing DING Yi-qing ZHOU Miao LIU Zhe-xuan LIANG Shu-quan FANG Guo-zhao School of Materials Science and Engineering Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan ProvinceCentral South UniversityChangsha 410083China College of Mechanical Engineering Key Laboratory of Hunan Province for Advanced Carbon-based Functional MaterialsHunan Institute of Science and TechnologyYueyang 414006China National Energy Metal Resources and New Materials Key Laboratory Central South University Changsha 410083China

Aqueous zinc metal batteries(AZMBs)have garnered widespread attention due to their low cost and high ***,current researches are still primarily focused on reversible cycling at low areal capacity,which is far from practical *** interfacial stability issues encountered during cycling and employing interfacial optimization strategies can promote the development of safe and eco-friendly *** introducingγ-valerolactone(GVL),which disrupts the original hydrogen bonding network of water,the electrochemical window of electrolyte is expanded,and the reactivity of water is significantly ***,the incorporation of GVL in Zn ion solvation alters the deposition pattern on the Zn anode surface,resulting in improved cyclic *** cells demonstrated excellent performance,maintaining stable over 400 h at 5 mA/cm^(2)-5 mA·h/cm^(2),and nearly 300 h in Zn||Zn symmetric cell at 80%depth of discharge(DOD).The full cells matched with NH_(4)V_(4)O_(10) could cycle over 200 cycles under the condition of high areal capacity(7 mA·h/cm^(2)),an N/P ratio of 1.99 and an E/C ratio of 9.3μL/(mA·h).

关键词： electrolyte additive Zn anode N/P ratio E/C ratio aqueous zinc metal batteries

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Current status and future perspective in electro-Fenton techniques for wastewater treatment: a bibliometric review

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Applied Nanoscience (Switzerland) 2023年第9期13卷 5885-5902页

作者： Liu, Gonggang Luo, Dan Wang, Luyao Wang, Chongqing Cao, Yijun Singh, Lakhveer Ahmadzadeh, Saeid He, Zhangxing Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology College of Materials Science and Engineering Central South University of Forestry and Technology Changsha410004 China School of Chemical Engineering Zhengzhou University Zhengzhou450001 China Department of Chemistry Sardar Patel University Himachal Pradesh Mandi175001 India Pharmaceutics Research Centre Institute of Neuropharmacology Kerman University of Medical Sciences Kerman Iran College of Chemical Engineering North China University of Science and Technology Tangshan063210 China

Wastewater pollution is a worldwide concern, and wastewater treatment is gaining growing global attention. Electro-Fenton is a promising method for the treatment of wastewater containing organic pollutants. This work offers an overview and bibliometric analysis of research on electro-Fenton treatment of wastewater. The literatures, consisting of 1898 documents from 2000 to 2021 collected from the Web of science database, were analyzed using bibliometric tools such as Bibliometrix package, CiteSpace, and VOSviewer. Document types, publication trends, subject categories, journals, institutions, countries, authors, keywords, and highly cited papers were analyzed. Research in this field has undergone three stages with the rapid development in the past 5 years. Environmental sciences (24.42%) is the leading Web of science category, and Engineering (48.37%) is the leading research area. China (38.46%) is the most productive country, followed by Spain (8.59%), Iran (8.11%), France (6.27%), and India (5.80%), while University of Barcelona (7.38%) is the most productive institute. Enric Brillas is the leading author and has the most publications (120 papers) and the highest h-index (58). The top five clusters include "landfill leachate", "heterogeneous electro-Fenton", "electrochemical oxidation", "photoelectro-Fenton", and "photocatalytic degradation". With the rapidly growing number of electro-Fenton related studies, novel research interests and feasible large-scale applications, various techniques are proposed. © 2023, King Abdulaziz City for science and technology.

关键词： Wastewater treatment

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Dual-phase change composites with temperature control and low infrared emissivity properties fabricated by electrospinning for infrared stealth and thermal camouflage

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science China(Technological sciences) 2024年第12期67卷 3755-3765页

作者： LI ChuanChang CHE PanPan XIE BaoShan ZENG XiaoLiang LONG Yi Key Laboratory of Renewable Energy Electric-Technology of Hunan Province School of Energy and Power EngineeringChangsha University of Science and TechnologyChangsha 410114China State Key Laboratory of Disaster Prevention&Reduction for Power Grid Changsha University of Science&Technology Changsha 410114China Shenzhen Institute of Advanced Electronic Materials Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Department of Electronic Engineering The Chinese Univrsity of Hong KongHong Kong 999077China

Infrared stealth technology allows targets to evade detection by thermal infrared detection and plays an important role in the defense industry and ***,current research and development of infrared stealth materials focuses only on reducing infrared emissivity or controlling the surface temperature of an object,and few studies combine the ***,in this paper,vanadium dioxide/polyethylene glycol/polyacrylonitrile(VO_(2)/PEG/PAN)composite nanofibrous films were fabricated using the electrospinning technique with PAN as the matrix,PEG as the temperature-regulated material and VO_(2)as the infrared emissivity *** composite nanofibrous films not only possessed excellent thermal stability and mechanical properties but also had good thermal regulation and adjustable infrared *** latent heat value of the first phase change was 40.42 J g^(-1)and the latent heat value of the second phase change was 4.27 J g^(-1)when the content of VO_(2)was 40wt%;more importantly,the infrared emissivity was 0.16 at 90℃.Therefore,the composite nanofibrous films could help achieve good infrared stealth and thermal camouflage performance for high-temperature targets through effective thermal buffering and infrared emissivity modulation *** the characteristics of ultra-lightweight,flexibility,foldability,adjustable shape,strong thermal stability,excellent mechanical properties,thermal self-regulation,and adjustable infrared emissivity,the prepared VO_(2)/PEG/PAN composite nanofibrous films present great potential for application in infrared stealth and thermal camouflage of new military equipment.

关键词： phase change thermal camouflage electrospinning vanadium dioxide infrared stealth

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Laser additive manufacturing of titanium alloys:process,materials and post-processing

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Rare Metals 2024年第12期43卷 6288-6328页

作者： Jin-Long Su Fu-Lin Jiang Jie Teng Le-Qun Chen Guillermo Requena Ming Yan Lai-Chang Zhang Y.Morris Wang Ilya V.Okulov Hong-Mei Zhu Guo-Wei Bo You-Xiang Chew Chao-Lin Tan Singapore Institute of Manufacturing Technology(SIMTech) Agency for ScienceTechnology and Research(A*STAR)Singapore999002Singapore College of Materials Science and Engineering Hunan UniversityChangsha410082China German Aerospace Center(DLR) Institute of Materials Research51147CologneGermany Metallic Structures and Materials Systems for Aerospace Engineering RWTH Aachen University52062AachenGermany Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen518055China Centre for Advanced Materials and Manufacturing Edith Cowan UniversityJoondalupWA6027Australia Department of Materials Science and Engineering University of CaliforniaLos AngelesCA900095USA Leibniz Institute for Materials Engineering-IWT 28359BremenGermany Faculty of Production Engineering University of Bremen28359BremenGermany Key Laboratory of Hunan Province of Equipment Safety Service Technology Under Extreme Environment University of South ChinaHengyang421001China Key Laboratory of Efficient and Clean Energy Utilization College of Energy and Power EngineeringChangsha University of Science and TechnologyChangsha410114China

Laser additive manufacturing(LAM)of titanium(Ti)alloys has emerged as a transformative technology with vast potential across multiple *** recap the state of the art,Ti alloys processed by two essential LAM techniques(i.e.,laser powder bed fusion and laser-directed energy deposition)will be reviewed,covering the aspects of processes,materials and *** impacts of process parameters and strategies for optimizing parameters will be *** types of Ti alloys processed by LAM,includingα-Ti,(α+β)-Ti,andβ-Ti alloys,will be overviewed in terms of micro structures and benchmarking ***,the post-processing methods for improving the performance of L AM-processed Ti alloys,including conventional and novel heat treatment,hot isostatic pressing,and surface processing(e.g.,ultrasonic and laser shot peening),will be systematically reviewed and *** review summarizes the process windows,properties,and performance envelopes and benchmarks the research achievements in LAM of Ti *** outlooks of further trends in LAM of Ti alloys are also highlighted at the end of the *** comprehensive review could serve as a valuable resource for researchers and practitioners,promoting further advancements in LAM-built Ti alloys and their applications.

关键词： Additive manufacturing Titanium alloy Process parameter Post-processing Microstructure and property Fatigue

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Boron Functionalized Cellulose-Nanocrystals Via Green Esterification Method as Lubricant Additive for Friction and Wear Reduction

SSRN

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SSRN 2024年

作者： Cai, Yutao Meng, Yuan Cheng, Yu Guan, Minghang Liu, Xiubo School of Materials Science and Engineering Central South University of Forestry and Technology Changsha410004 China Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology Changsha410004 China

Boron Functionalized Cellulose-nanocrystal (BFC) was prepared by a facile and green esterification route. BFC had a high crystallinity of more than 80% and a needle-like morphology with a length of hundreds nm and a diameter of 10~20 nm, very similar to those of cellulose nanocrystal. The largest degree of substitution of hydroxyl by borate ester group was obtained for BFC under the optimum conditions of reaction time and temperature (5 h, 80 ℃). When used as a lubricant additive in castor oil, BFC-5-80 achieved a stable, homogeneous and monodisperse state and the tribological performances were evaluated by a reciprocating ball-on-plate tribometer. The friction coefficient and wear volume of castor oil with 2wt.% BFC-5-80 are 0.058 and 0.281×10-3 mm3 under certain conditions of load, frequency and testing time (6 N, 8 Hz, 2 hours), 23.7% and 59.2% lower than those of pure castor oil as well as 8.0% and 33.9% than those of castor oil with CNC. Based on the analysis results of worn surfaces and wear residues, the outstanding friction-reduction and anti-wear performances of BFC-5-80 can be explained by two facts that a complete film consisting of BFC-5-80 network and adsorbed castor oil molecules forms between the mating surface and a chemical transfer film composed of ferrum boride and iron oxides is also generated on the steel interface. © 2024, The Authors. All rights reserved.

关键词： Wear of materials

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High Performance of Cellulose Nanocrystal Based Bicomponent Supramolecular Hydrogel Lubricants

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SSRN 2024年

作者： Zhou, Yulong Meng, Yuan Cheng, Yu Guan, Minghang Liu, Xiubo School of Materials Science and Engineering Central South University of Forestry and Technology Changsha410000 China Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology Changsha410000 China

Cellulose nanocrystal based bicomponent supramolecular hydrogel (CNC/x-DG/y) was prepared by a simple mixing method using CNC and diglycerol (DG) as gelators. Once deionized water is set at 1 mL, CNC/x-DG/y hydrogel becomes stronger with increasing CNC content (no less than 2.4 wt%), but weakened with enhancing DG content (0.1~1.3 mL). The gelling mechanism is attributed to multiple H-bonds between DG and CNC, which can self-assemble into a three-dimensional network to effectively trap water molecules. CNC/x-DG/y hydrogel shows many advantages for lubrication application, including reversible shear thinning behaviours, satisfactory viscoelasticity, excellent creep recovery performances, outstanding anti-rust property and much lower water volatilization rate, which exactly have improved the drawbacks of water-based lubricants. CNC/2.4-DG/0.1, a typical CNC/x-DG/y hydrogel, exhibits excellent tribological performances which are deeply dependent on the applied load and the reciprocating frequency. The friction coefficient and wear volume for CNC/2.4-DG/0.1 are 0.059 and 0.81×10-3 mm3, apparently lower than those for two reference lubricants. The high performance for reducing friction and wear of CNC/2.4-DG/0.1 can be ascribed to the synergistic mending effect of CNC nanoneedles and DG molecules and the dissipative effect caused by H-bonds between CNC nanoneedles and DG molecules. © 2024, The Authors. All rights reserved.

关键词： Hydrogels

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