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Piezoelectric fibers based on silk fibroin with excellent output performance

Chinese Physics B 2024年第8期33卷 128-135页

作者：甄文强陈杰范苏娜张耀鹏 State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

The self-powered tissue engineering scaffold with good biocompatibility is of great significance for stimulating nerve cell *** this study,silk fibroin(SF)-based fibers with regulatable structure and piezoelectric performance are fabricated by dry-spinning and *** concentration of SF and calcium ion in spinning dope and the post-treatment affect the conformation transition and crystallinity of *** a result,the SF fibers exhibit high piezoelectric coefficient d_(33)(3.24 pm/V)and output voltage(~27 V).Furthermore,these piezoelectric fibers promote the growth of PC-12 cells,demonstrating the promising potential for nerve repair and other energy harvester.

关键词： silk fibroin piezoelectric fiber dry-spinning conformation transition

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Recent progress of iron-based electrocatalysts for nitrogen reduction reaction

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Journal of Materials science & Technology 2023年第9期140卷 121-134页

作者： Tianyi Wang Zhongyuan Guo Xiaoli Zhang Qinye Li Aimin Yu Chengzhang Wu Chenghua Sun Department of Chemistry and Biotechnology School of ScienceComputing and Engineering TechnologiesSwinburne University of TechnologyHawthornVIC3122Australia School of Material Science and Engineering Zhengzhou UniversityZhengzhou 450001China State Key Laboratory of Advanced Special Steel Shanghai Key Laboratory of Advanced FerrometallurgySchool of Materials Science and EngineeringShanghai UniversityShanghai 200444China

Ammonia is a critical feedstock for modern industry and agriculture,which is also a promising carbonfree energy *** nitrogen reduction reaction(ENRR)is a sustainable and efficient approach to synthesize ammonia under ambient reaction *** relies on the development of highly efficient *** far various strategies have been applied to enhance the performance of catalysts including tuning the electronic structure,binding strength,coordination configuration as well as the introduction of multiple active sites and *** this review,the recent progress of Fe-based electrocatalysts and their coordination effect,syner gistic effect and def ect effect for nitrogen reduction reaction have been *** critical review focuses on the discussion of theoretical advancement,the performance origin of ENRR activity and selectivity of Fe-based electrocatalysts.

关键词： effect coordination critical

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Super tensile ductility in an as-cast TiVNbTa refractory high-entropy alloy

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Progress in Natural science:Materials International 2024年第5期34卷 1076-1084页

作者： Chao Guo Yuan Xing Pan Wu Ruitao Qu Kexing Song Feng Liu State Key Laboratory of Solidification Processing School of Materials Science and Engineering Northwestern Polytechnical University Institute of Materials Henan Academy of Sciences

Refractory high-entropy alloy(RHEA) usually exhibits a high melting point and hence a very high deformation resistance at high temperatures. However, the relatively poor plasticity at room temperature, i.e., only few RHEAs displaying as-cast tensile ductility, strongly limits the applications of RHEAs as engineering materials. In this work, we show a huge tensile ductility observed in an as-cast TiVNbTa RHEA(～40 % fracture elongation)accompanying with a high yield strength(～800 MPa), which are rarely reported properties for RHEAs. The ascast alloy shows a simple body-centered cubic(BCC) structure with dendrites. Ductile fracture with many dimples is the main fracture mechanism, while no twinning and deformation induced phase transition was observed. The uniform plastic deformation mainly relies on the planar and cross-slip of dislocations. The present result suggests the huge ductility potentials for RHEAs, providing a clue for designs future high performance RHEAs with good ductility.

关键词： Refractory high-entropy alloy Mechanical properties Deformation mechanism Fracture mechanism

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High-temperature Mo-based metallic glass thin films with tunable microstructure and mechanical behaviors

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Journal of Materials science & Technology 2024年第31期198卷 20-35页

作者： Chenyang Wang Zhifu Zhang Haofei Wu Xiaodong Wang Kolan Madhav Reddy Pan Liu Shuangxi Song State Key Laboratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Developing high-temperature metallic glass thin films(MGTFs)with excellent combination properties is crucial for extending the practical applications of metallic glasses.A high-temperature multicomponent Mo-based MGTF with tunable microstructure prepared by single-target magnetron sputtering was presented in this *** mechanical behaviors and thermal stability of MGTFs related to microstructure are systemically *** adjusting deposition parameters(pressure and power),the microstructure of as-deposited MGTFs can be altered from the dense homogeneous type to the loose nanoglass *** structure evolution can be explained by the competition between the surface diffusion and geometric shadowing *** with dense microstructure possess smaller surface roughness,higher hardness,higher Young's modulus,and better wear ***,they also possess higher thermal stability where the fully amorphous structure and smooth surface can be well maintained after vacuum annealing at 1123 K for 30 *** contrast,the MGTF with nanoglass microstructure shows inferior mechanical properties and thermal stability due to plentiful loose interface regions,providing abundant free volumes during deformation and acting as favorable crystal nucleation sites during *** correlation between the microstructure and properties of as-deposited MGTFs is clarified with the universal scaling law of *** annealing treatment distinctly increases the hardness and Young's modulus of ***,after annealing,pop-in behaviors occur in the as-annealed MGTFs with dense microstructure but not in the as-annealed MGTF with nanoglass microstructure during the *** phenomena can be rationalized by the annihilation of free volumes during annealing and the evolution of the dynamical variable,shear transition zone,for the plastic deformation in MGTFs.

关键词： Metallic glass thin films Magnetron sputtering Microstructure Mechanical behavior Thermal stability

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Regulate the chemical property of the carbon nanospheres layer modified on the surface of sodium metal anode to achieve high-load battery

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Nano Research 2024年第11期17卷 9728-9736页

作者： Chuang Li Xueying Zheng Minghao Sun Fei Tian Danni Lei Chengxin Wang State Key Laboratory of Optoelectronic Materials and Technologies School of Materials Science and Engineering Sun Yat-Sen University Guangzhou 510275 China

The energy density of batteries can be increased by using high-load cathode material matched with sodium (Na) metal anode. However, the large polarization of the battery under such harsh conditions will promote the growth of Na dendrites and side reactions. Carbon materials are regarded as ideal modify layers on Na metal anode to regulate the Na+ plating/stripping behavior and inhibit the Na dendrites and side reactions due to their light weight, high stability and structural adjustability. However, commonly used carbon nanotubes and carbon nanofibers cannot enable these modified Na metal anodes to operate stably in full batteries with a high-load cathode (>15 mg·cm^(−2)). The most fundamental reason is that abundant polar functional groups on the surface bring serious side reactions and agglomerations lead to uneven Na+ flow. Here, a proof-of-concept study lies on fabrications of carbon nanospheres with small amount of polar functional groups and sodiophobic components on the surface of Na metal anode, which significantly enhances the uniformity of the Na+ plating/stripping. The assembled symmetric battery can cycle stability for 1300 h at 3 mA·cm^(−2)/3 mAh·cm^(−2). The full battery with high-load Na3V2(PO4)3 (30 mg·cm^(−2)) maintains a Coulombic efficiency of 99.7% after 100 cycles.

关键词： artificial interfacial layers carbon materials plasma cleaning dendritic sodium sodium metal batteries

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Constructing on-demand single/multi-color transitioning fabrics with photocatalysis/photothermal-armed deficient semiconductors

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Nano Research 2024年第5期17卷 3633-3643页

作者： Daniel K.Macharia Shamima Sarker Meng Liu Zeyulong Wen Nuo Yu Meifang Zhu Zhigang Chen State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

On-demand color switching systems that utilize synchronized semiconductor-catalyzed reduction and photothermal-accelerated oxidation in liquid/solid are highly ***,on-demand single/multi-color switching fabrics have been constructed by using defective SnO_(2):Sb-based color switching ***_(2):Sb nanocrystals with the suitable doping concentration accord lattices with abundant free electrons,conferring high photocatalytic and photothermal performances.A well-crafted set of dual light-responsive semiconductor-catalyzed systems with rapid color change can be attained via the homogenous mixture of SnO_(2):Sb with suitable redox dyes to produce single-color(RGB(red,green,blue))and multi-color transitioning(purple and green)*** illumination of these systems by 450 nm light triggers rapid photocatalytic discoloration,while irradiation by 980 nm light confers the photothermal effect that accelerates recoloration in ***,the inks can be extended to rewritable fabrics by embedding the nanocrystals and redox dyes into hydroxyethyl cellulose(as the polymer matrix)and then coating on hydrophobic cotton fabrics to produce photo-switchable fabrics with excellent single/multi-color *** exploiting the dual light interactions with the semiconductor-mediated systems,various images/letters can be remotely printed and erased on the rewritable fabrics which show promise for potential applications as information storage media and visual ***,the present rewritable fabric shows good stability and *** present work provides insights into the development of novel color-switching materials.

关键词： color switching defective semiconductor photocatalysis photothermal rewritable fabrics

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Multistep continuous flow synthesis of Erlotinib

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Chinese Chemical Letters 2024年第4期35卷 371-375页

作者： Hui Jin Qin Cai Peiwen Liu Yan Chen Derong Wang Weiping Zhu Yufang Xu Xuhong Qian State Key Laboratory of Bioreactor Engineering Shanghai Key Laboratory of Chemical BiologySchool of PharmacyEast China University of Science and TechnologyShanghai 200237China

Erlotinib is an orally administered, highly effective, specific epidermal growth factor receptor tyrosine kinase inhibitor, used to treat non-small cell lung cancer and pancreatic cancer. The traditional synthetic methods for Erlotinib exhibit long reaction time and safety concern. Herein, we describe a novel five-step route for the synthesis of Erlotinib in flow. These five steps comprise etherification, nitration, reduction,addition and cyclization reactions. All steps were optimized and converted to continuous flow process,which drastically reduces the reaction time and considerably improves the process safety as well as the total yield. Enabled by five continuous flow units, Erlotinib is efficiently afforded with an E-factor of 38,an overall yield of 83%, and a total residence time of 25.1 min. Majority steps in this process have been optimized for quantitative conversion, which offers the possibility of telescoping the entire process.

关键词： Erlotinib Continuous flow synthesis Microchannel flow reactor Process optimization Continuous nitration Continuous hydrogenation

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Improvement of Formation,Microstructure and Mechanical Properties of TIG Welded TC4 Titanium Alloy by Ultrasonic Coaxial Radiation

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Acta Metallurgica Sinica(English Letters) 2024年第12期37卷 2045-2056页

作者： Yihao Gao Boqiao Ren Yunhao Chen Xinchen Sui Xiaohui Zhao Chenglei Fan Chao Chen Key Laboratory of Automobile Materials School of Materials Science and EngineeringJilin UniversityChangchun130025China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin150001China

In this study,the effects of ultrasonic coaxial assisted TIG welding(U-TIG)on the formation,microstructure,and mechanical properties of TC4 titanium alloy welded joints were *** results indicated that at optimal ultrasonic power and welding current settings,remarkable improvements of welded joint were ***,the weld depth-to-width ratio increased by 267%compared to conventional TIG welding,reaching ***,the microhardness of the welded seam increased by 53%,reaching 550.1 HV,while the tensile strength of the welded joint rose to 1197.7 MPa,representing a 12.2%*** compressing effect of ultrasound concentrates the energy of the arc,thereby improving the penetration depth of the welded *** addition,ultrasonic cavitation plays a crucial role in refining the grain structure of the weld seam,consequently enhancing its strength.

关键词： TC4 alloy Ultrasonic coaxial assisted TIG welding(U-TIG) Arc shape Microstructure Mechanical properties

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Li Alloys in All Solid-state Lithium Batteries:A Review of Fundamentals and Applications

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Electrochemical Energy Reviews 2024年第1期7卷 586-623页

作者： Jingru Li Han Su Yu Liu Yu Zhong Xiuli Wang Jiangping Tu State Key Laboratory of Silicon and Advanced Semiconductor Materials Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang ProvinceSchool of Materials Science and EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina

All solid-state lithium batteries(ASSLBs)overcome the safety concerns associated with traditional lithium-ion batteries and ensure the safe utilization of high-energy-density electrodes,particularly Li metal anodes with ultrahigh specific ***,the practical implementation of ASSLBs is limited by the instability of the interface between the anode and solid-state electrolyte(SSE).To mitigate this,considerable research has been dedicated to achieving enhanced stability at the anode/SSE *** the current strategies for enhancing interface performance,the concept of Li-alloy materials is extensively used and well functionalized in various scenarios,including Li alloys as anodes,Li-alloy interlayers and Li alloys in the *** the notable achievements of Li-alloy materials in ASSLBs,the functionality,practicality and working mechanism of Li-alloys have not been fully *** review commences by providing an exhaustive and in-depth examination of the fundamental kinetics,thermodynamics,and mechanics,highlighting Li-alloy ***,through a systematic interconnection of material properties and their practical applications,we undertake a comprehensive analysis of the operative principles governing Li *** analytical approach allows a thorough evaluation of the viability and utility of Li alloys within the context of ***,this review concludes by succinctly summarizing the future prospects and inherent potential of Li-alloy materials for further advancing the field of ASSLBs.

关键词： Li alloys Anode All-solid-state lithium batteries Physicochemical properties Applications

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Selenide in 3D structure of polyhedra branching out nanotubes for collaborative facilitated conversion and capturing of polysulfide in Li-S batteries

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Rare Metals 2025年第1期44卷 169-184页

作者： Yi-Yang Li Hui Liu Bo Jin Nan Gao Xing-You Lang Qing Jiang Key Laboratory of Automobile Materials Ministry of EducationCollege of Materials Science and EngineeringJilin UniversityChangchun 130022China State Key Laboratory of Superhard Materials College of PhysicsJilin UniversityChangchun 130012China

Lithium-sulfur batteries(LSBs)are considered as the promising solution to replace conventional lithium-ion batteries due to satisfactory energy *** recent times,the LSBs field has been found to face some difficulties in exploring practical applications in which cycling stability and cycle life are awful owing to the shuttling effect of lithium polysulfides(LiPSs)and low sulfur *** this work,by synthesizing Co_(3)Se_(4) nanoparticles onto N-doped carbon(NC)polyhedra interconnected with carbon nanotubes(CNTs),NC@Co_(3)Se_(4)/CNTs is proposed as a multifunctional sulfur *** Co_(3)Se_(4) nanoparticles fleetly catalyze the conversion of LiPSs and availably immobilize ***,the NC polyhedral skeleton enhances the electronic conductivity of active sulfur,while the CNTs facilitate Li+diffusion and supply a mass of conductive ***-functional theory(DFT)calculations demonstrate the relevant *** is to say,the NC@Co_(3)Se_(4)/CNTs benefit from the synergistic effect of Co_(3)Se_(4) nanoparticles(highly catalytic ability and strong adsorbability for LiPSs)and the special carbonaceous structure,rapidly converting LiPSs and inhibiting the shuttle of ***,lithium-sulfur battery assembled with S/NC@Co_(3)Se_(4)/CNTs cathode as well as nitrogen and sulfur co-doped carbon-coated polypropylene(N,S-C/PP)separator possesses a high initial discharge capacity of 1413 mAh·g-1 at 0.12C and persistently circulates for 1000 cycles at 1C with a capacity attenuation rate per cycle of 0.034%.This work provides a realistic idea for the use of transition metal selenide in the field of high-performance LSBs.

关键词： Selenide Shutting effect Conversion and capturing Long-term cycling stability Density-functional theory calculation

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