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Microwave shock motivating the Sr substitution of 2D porous GdFeO_(3) perovskite for highly active oxygen evolution

Journal of Energy Chemistry 2024年第1期88卷 232-241,I0006页

作者： Jinglin Xian Huiyu Jiang Zhiao Wu Huimin Yu Kaisi Liu Miao Fan Rong Hu Guangyu Fang Liyun Wei Jingyan Cai Weilin Xu Huanyu Jin Jun Wan State Key Laboratory of New Textile Materials and Advanced Processing Technologies Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing&FinishingWuhan Textile UniversityWuhan 430200HubeiChina Future Industries Institute STEMUniversity of South AustraliaAdelaideSA 5095Australia Institute for Sustainability Energy and ResourcesThe University of AdelaideAdelaideSA 5005Australia

The incorporation of partial A-site substitution in perovskite oxides represents a promising strategy for precisely controlling the electronic configuration and enhancing its intrinsic catalytic *** methods for A-site substitution typically involve prolonged high-temperature *** these processes promote the development of unique nanostructures with highly exposed active sites,they often result in the uncontrolled configuration of introduced ***,we present a novel approach for synthesizing two-dimensional(2D)porous GdFeO_(3) perovskite with A-site strontium(Sr)substitution utilizing microwave shock *** technique enables precise control of the Sr content and simultaneous construction of 2D porous structures in one step,capitalizing on the advantages of rapid heating and cooling(temperature~1100 K,rate~70 K s^(-1)).The active sites of this oxygen-rich defect structure can be clearly revealed through the simulation of the electronic configuration and the comprehensive analysis of the crystal *** electrocatalytic oxygen evolution reaction application,the synthesized 2D porous Gd_(0.8)Sr_(0.2)FeO_(3) electrocatalyst exhibits an exceptional overpotential of 294 mV at a current density of 10 mA cm^(-2)and a small Tafel slope of 55.85 mV dec^(-1)in alkaline *** study offers a fresh perspective on designing crystal configurations and the construction of nanostructures in perovskite.

关键词： 2D materials Perovskite Microwave Electrocatalysis Oxygen evolution reaction

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Metal halide perovskite nanocrystals with enhanced photoluminescence and stability toward anti-counterfeiting highperformance flexible fibers

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Nano Research 2023年第2期16卷 3542-3551页

作者： Ranran Zhou Chi-An Cheng Xuyi Wang Kun Nie Jing Wu Mengyun Wu Xiuqiang Duan Ziyao Hu Injamam Ul Huq Hua Wang Luoxin Wang Lefu Mei Haikun Liu Xiaoxue Ma School of Materials Science and Engineering Hubei Key Laboratory for New Textile Materials and ApplicationsKey Laboratory of Polyphenylene Sulfide Fiber and Application in Textile Industryand State Key Laboratory of New Textile Materials&Advanced Processing TechnologyWuhan Textile UniversityWuhan 430200China Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of Geosciences(Beijing)Beijing 100083China Department of Bioengineering University of California Los AngelesLos Angeles 90095USA China Bluestar Chengrand Co. LtdHigh Tech Organic Fiber Key Laboratory of Sichuan ProvinceChengdu 610042China Department of Energy and Chemical Engineering Dongguan University of TechnologyDongguan 523808China

As a new type of light-collecting and luminescent material,all-inorganic cesium lead halide CsPbX_(3)(X=Cl,Br,I)perovskite nanocrystals(NCs)are expected to have a wide range of applications in the fields of photovoltaics,optoelectronics,and fluorescence anti-counterfeiting,***,improving the fluorescence performance and stability of CsPbX_(3)perovskite NCs to prompt their applications would promise both fundamental and practical significance for in-depth research in the field of halide *** this paper,we developed a modification strategy to introduce a halogen source,zinc bromide(ZnBr_(2))in hexane,to CsPbX_(3)perovskite that can be conducted under atmospheric conditions with reduced reaction cost and easier *** first work in this paper was to apply the modification strategy to CsPbI_(3)nanowires(NWs).Compared with the untreated NWs,the ZnBr_(2)/hexane modified CsPbI_(3)NWs exhibited better fluorescence ***,based on the study of perovskite NWs,we investigated perovskite nanocrystal-CsPbI_(3)nanorods(NRs)with different morphologies and *** was found that the luminescence properties of nanorods(NRs)were ***,we infiltrated the modified NRs into the aramid/polyphenylene sulfide(ACFs/PPS)composite paper yielded from our previous work to study its fluorescence performance for *** luminescence properties under ultraviolet light irradiation enable better performance in fluorescence *** ZnBr_(2)/hexane modification strategy and the applications studied in this work will expand the scope of perovskite research,laying the foundation for the applications of fluorescent anti-counterfeiting,nano-photoelectric devices,and fluorescent composite materials.

关键词： perovskite nanocomposites photoluminescence fluorescent anti-counterfeiting aramid/polyphenylene sulfide compound paper

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Ballistic performance of spaced multi-ply soft fabrics: Experimental and numerical investigation

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Defence technology（防务技术） 2024年第4期34卷 143-155页

作者： Zhongwei Zhang Xiaoning Yang Yuan Lin Ziming Xiong Yuhang Xiang Yi Zhou Mingyang Wang State Key Laboratory of Explosion&Impact and Disaster Prevention&Mitigation Army Engineering University of PLANanjing 210007China School of Mechanical Engineering Nanjing University of Science&TechnologyNanjing 210007China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China Postdoctoral Station of Civil Engineering Army Engineering University of PLANanjing 210007China

It has been reported that the ply gap influences the ballistic resistance of spaced multi-ply fabric systems,but its working mechanism was not well-understood. This paper reports the experimental and numerical approaches and results of an investigation on the mechanisms that enable the improved ballistic performance of spaced multi-ply systems. Penetration tests were performed over a range of impact velocities ranging from 200 m/s to 400 m/s. The results confirmed that the ply gap is beneficial to the energy absorption capability of the systems. This is because the front plies tend to absorb more energy when they are not immediately constrained by the rear plies. During a ballistic event, the gap relieves the reflection of the compressive pulse, prolonging the projectile engagement time with the front plies;on the other hand, the rear plies become increasingly less active in dissipating energy as the gap *** the gap is sufficiently widened to avoid any interference between the plies before the failure of the front ply, the responses of the whole system no longer vary. It was also found that the ballistic performance of the spaced systems is influenced by ply thickness, impact velocity, and the stacking order of the ply gap.

关键词： Energy absorption capability Ply gap Ballistic performance The front ply The rear ply

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Enhancement and recovery of photoluminescence and stability by multifunctional etching ligands treatment for perovskite nanocrystals

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Journal of Energy Chemistry 2023年第1期76卷 495-502,I0013页

作者： Yang Zhao Haipeng Zeng Xueqing Cai Yingshan Zhou Yangming Jiang Xin Zheng Lin Li Shujing Zhang Long Luo Weixi Li Xiaoru Zhang Ranran Liu Wenxi Liang Rui Guo Xiong Li Michael Gratzel Center for Mesoscopic Solar Cells Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074HubeiChina State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430073HubeiChina State Key Laboratory of Functions and Applications of Medicinal Plants Guizhou Medical University Guiyang 550014GuizhouChina

Perovskite nanocrystals(PNCs)have recently become promising optoelectronic materials due to their excellent photophysical ***,the highly dynamic binding state between ligands and the surface of PNCs has severely restricted their luminescent properties and *** this work,1,3-bisbenzyl-2-oxoimidazolidine-4,5-dicarboxylic acid(cycle acid,CA)is introduced as both an etchant and a ligand upon post-synthetic surface treatment of *** removing the imperfect octahedrons[Pb X_(6)]^(4-)and passivating the surface defects synergistically,this treatment improves photoluminescence quantum yields from 76%to 95%and enhances the stability of PNCs against polar solvent,moisture,heat,and ***,CA can effectively and instantly recover the luminescence emission for aged *** a result,the CA-Cs Pb Br_(3)PNCs and CA-Cs Pb IxBr_(3-x)PNCs are applied as color-converting layers on a blue LED chip for warm white light-emitting diodes(WLEDs)with a color coordinate of(0.41,0.40).Importantly,the CA-based WLED device exhibits superior stability in operational conditions.

关键词： Perovskite nanocrystals Synergistic effect Emission recovery White light emitting diodes Stability

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Achieving high strength-ductility synergy in Mg-6Sn-3Zn-0.3Zr(wt.%)alloy via a combination of casting,pre-treatment and hot extrusion

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Journal of Magnesium and Alloys 2024年第11期12卷 4622-4645页

作者： Tianshui Zhou Yaqin Li Feifei Guo Qinglin Li Zhi Jia Dexue Liu School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050China State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of TechnologyLanzhou 730050China

Achieving the strength-ductility synergy in Mg alloys is a gigantic challenge,especially in rare-earth-free Mg *** this study,a new Mg-Sn-Zn-Zr alloy with high ultimate tensile strength(~284-326 MPa)without sacrificing elongation-to-failure(~22.1-27.6%)was developed by utilizing casting,pre-treatment and hot *** random rather than basal texture is observed both in as-cast and pre-treatment ***,the strong texture is effectively weakened via hot extrusion whilst remaining *** importantly,after hot extrusion,the grain sizes of as-cast and pre-treatment samples were significantly refined down to about 10μ*** of as-extruded microstructures of the alloy reveals that the grain refinement is highly associated with the particle stimulated nucleation(PSN)and continuous/discontinuous dynamic recrystallization(C/DDRX)***,the results suggest that the combination of pre-treatment and hot extrusion not only promotes multiplication of geometrically-necessary dislocations(GNDs)but enhances dynamic precipitation,which boosts the formation of fine and homogenous *** on the results of X-ray diffraction(XRD),transmission electron microscope(TEM)and selected area electron diffraction(SAED),the precipitates are Mg_(2)Sn ***,the main orientation relationship identified by high resolution TEM(HRTEM)between Mg_(2)Sn phases andα-Mg matrix could be described as(111)Mg_(2)Snor(220)Mg_(2)Sn∥(0001)Mgwith a coherent *** refined grains size,ultra-fine precipitates and high density of GNDs would substantially contribute to the enhancement of the strength and the corresponding contributions are calculated to be~183-185 MPa,~30.9-38 MPa and~14.2-31.7 MPa,***,texture weakening or randomizing,grain refinement and coherent interfaces are mainly responsible for the high *** current study can provide beneficial insights into the development of high-performance rare-earth-

关键词： Mg-Sn-Zn-Zr alloy Hot extrusion Pre-treatment Mechanical properties Microstructure evolution Strengthening and plasticity mechanisms

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Preparation of ultra-high ductility and high strength Mg-Sn-Zn-Zr alloy by differential thermal ECAP(DT-ECAP)induced heterogeneous structure

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Journal of materials Science & technology 2024年第32期199卷 222-245页

作者： Tianshui Zhou Bing Wang Yaqin Li Shiwen Hu Xiaoqiang Li Dexue Liu State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of TechnologyLanzhou 730050China School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050China

Developing high-ductility magnesium(Mg)alloys has become an imminent issue for their wide *** this work,a new Mg-Sn-Zn-Zr alloy with ultra-high ductility(elongation,*** 40%)and high ultimate tensile strength(UTS,~309-354 MPa)was prepared by a novel differential thermal equal-channel angular pressing(DT-ECAP).Heterogeneous structures,including bimodal grain structures and in-homogeneous distribution of second phases composed of banded structure and particle free zone(PFZ),were induced by DT-ECAP *** on the results of electron backscatter diffraction(EBSD),trans-mission electron microscopy(TEM),high-resolution TEM(HRTEM),and selected area electron diffraction(SAED),the bimodal grain structure originated from incomplete dynamic recrystallization(DRX)domi-nated by Zener pinning,strain-induced grain boundary migration(SIBM)and the limitation of polycrys-tallization due to lower dislocation ***,the bimodal distribution of second phases was highly associated with the defect density and initial *** importantly,the enhanced strength of DT-ECAPed alloys can be primarily attributed to hetero-deformation induced(HDI)strengthening,grain boundary strengthening,and precipitation ***,HDI hardening,texture weakening or randomizing activation of non-basal slip,high density of dislocations in sub-structures,and twining in-duced superior work-hardening effect,which was highly responsible for the ultra-high ductility in sixth pass(6P)*** current work provides a novel DT-ECAP process for inducing heterogeneous structure and offers beneficial insight into the development of ultra-high ductility and high strength for rare-earth-free Mg alloys via a combination of HDI strengthening and hardening and other vital mechanisms.

关键词： DT-ECAP process Heterogeneous structures HDI strengthening and hardening Mechanical properties Mg-Sn-Zn-Zr alloy

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Electrolyte effect on electrochemical behaviors of manganese fluoride material for aqueous asymmetric and symmetric supercapacitors

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Rare Metals 2024年第3期43卷 1048-1061页

作者： Zheng-Hua He Jian-Fei Gao Ling-Bin Kong State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals Lanzhou University of TechnologyLanzhou730050China School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou730050China

Exploring wide voltage window materials is not only an available measure to enhance the energy density of hybrid supercapacitor(HSCs),but also avoids the dynamic mismatch caused by different energy storage mechanisms of two electrodes in assembled symmetrical ***,there are few reports about the wide potential window materials except Bi_(2)O_(3)and VO_(2).Therefore,the MnF_(2)synthesized by solvothermal reaction was served as the electrode for *** MnF_(2)exhibited electrochemical activity in alkaline solution in three-electrode system,especially with a wide potential window from-0.8 to+0.5 V in 2 mol·L^(-1)***,the assembled MnF_(2)//MnF_(2)symmetrical HSC had a potential window of 1.5 V,and it exhibited outstanding long-cycle ***,when MnF_(2)was taken as the negative and positive respectively,the potential windows of asymmetric devices CoMoO_(4)//MnF_(2)and MnF_(2)//Activated Carbon(AC)could reach 1.3 and 1.45 V,respectively,showing excellent cycle *** work shows that MnF_(2)material has great research value in HSC,and provides a new research direction for developing high-performance devices.

关键词： Manganese fluoride Potential window Hybrid supercapacitors Electrochemical performance

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Laser Powder Bed Fusion of Beta-Type Titanium Alloys for Biomedical Application:A Review

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Acta Metallurgica Sinica(English Letters) 2024年第1期37卷 17-28页

作者： Xuan Luo Chao Yang Dongdong Li Lai-Chang Zhang State Key Laboratory of Materials Processing and Die&Mould Technology Huazhong University of Science and TechnologyWuhan430074China National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials Guangdong Provincial Key Laboratory for Processing and Forming of Advanced Metallic MaterialsSouth China University of TechnologyGuangzhou510640China Centre for Advanced Materials and Manufacturing School of EngineeringEdith Cowan University270 Joondalup DriveJoondalupPerthWA6027Australia

Additive manufacturing ofβ-type titanium alloy is expected to replace Ti-6Al-4V alloy in the field of orthopedic implantation because of their low elastic modulus,excellent corrosion resistance,and *** briefly introducing the laser powder bed fusion(LPBF)process and physical phenomena,this paper reviews the recent progresses in LPBF-edβ-type Ti *** strategies to strengthening and tougheningβ-type Ti alloys are critically *** is followed by the processing routes employed to achieve to low modulus for orthopedic applications,especially a new methodology for tailoring crystallographic orientation called multi-track coupled directional *** effect of processing and compositions on performance metrics ofβ-type Ti alloys included corrosion behavior,and biocompatibility is *** the end,challenges in additive manufacturing ofβ-type Ti alloys in future are highlighted,with the aim to ensue clinical application of LPBF-edβ-type Ti alloys.

关键词： β-type Ti alloys Laser powder bed fusion Mechanical properties Elastic modulus Biocompatibility

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Gel electrolyte based high-performance fiber battery

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Science Bulletin 2024年第18期69卷 2811-2813页

作者： Linli Gan Mengdie Lei Guangming Cai Weilin Xu State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China

Batteries have experienced rapid development due to their outstanding energy storage performance and widespread *** progress has driven advancements in electric vehicles,energy storage systems,and portable electronic devices,while also increasing demand for lightweight designs,high energy density,and environmental sustainability[1].However,traditional rigid batteries face significant challenges related to mechanical flexibility,safety,and environmental impact,making them unsuitable for the unique requirements of these emerging applications[2].Consequently,flexible fiber batteries have emerged,leveraging innovations in materials and structural design to offer energy solutions capable of bending,stretching,and adapting to various complex *** batteries hold great potential in applications such as wearable devices[3],flexible electronics[4],smart textiles[5,6],and biomedical devices[7].Traditional lithium-ion batteries are widely used due to their high energy density and long cycle life.

关键词： battery performance fiber

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Transparent electromagnetic absorption film derived from the biomass derivate

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Journal of materials Science & technology 2024年第18期185卷 98-106页

作者： Bohan Zhang Jiacheng Cui Dapeng He Jiaming Zhang Lieji Yang Wei Zhu Hualiang Lv State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China Institute of Optoelectronics and Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception Fudan UniversityShanghai 200433China State Key Laboratory for Marine Corrosion and Protection Luoyang Ship MaterialChina School of Mathematical and Physical Sciences Wuhan Textile UniversityWuhan 430200China

Electromagnetic wave absorption materials featuring small thicknesses and wide effective absorption bandwidth(EAB)are highly required for next-generation portable devices,wearable electronics,and blooming military ***,traditional EM particle absorbents,such as carbon-based,mag-netic metal-based,and MXene-based materials are always visible black,which severely hinders their uti-lization as microwave-stealth smart window ***,it is a critical challenge to fabricate flexible windows simultaneously possessing high optical transmittance and excellent EM wave absorption ***,we prepared a transparent wood composite with an optical transmittance value of more than-83%through a delignification and polymer composite immersion *** delignification process could remove the light-absorbing lignin component,and the transparent woods were realized by immersing the delignified wood into refractive-index-matched pre-polymerized acrylamide(AM)in-cluding minor silver nanowires,carbon nanotubes,and reduced graphene *** addition,due to the presence of numerous polarization centers originating from hydrophilic functional groups and conductive fillers,the transparent wood composite showed superior EM absorption performance,and EAB can reach 9.5 GHz,almost occupying the whole X band(8.2-12.4 GHz)and Ku band(12.4-18 GHz)at a thickness of 2.0 ***,the transparent wood presented a great insulative thermal performance with a low thermal conductivity of 0.45 W m^(−1)K^(−1)(half of common glass).The developed transparent wood com-posites offered significant potential as smart energy-efficient windows with the expectation to survive military equipment and alleviate EM pollution.

关键词： Electromagnetic wave absorption Dielectric loss Optical transmittance Polyacrylamide Wood composite

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