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science china(Technological sciences) 2010年第6期53卷 1520-1525页

作者： lai jianzhong1 & {2. wei2.1 department of materials science and engineering.nanjing University of science and technology,nanjing 2.0094,china 2.College of materials science and engineering,Southeast University,nanjing 2.1189,china 1. department of materials {2. and engineering Nanjing University of Science and Technology Nanjing 210094 China2. College of Materials Science and Engineering Southeast University Nanjing 211189 China

Ultra-high performance cementitious composites (UHPCC) were prepared by replacing 60% of cement with ultra-fine industrial waste *** dynamic damage and compressive stress-strain relations of UHPCC were studied using split Hopkinson pressure bar (SHPB).The damage of UHPCC subjected to repeated impact was measured by the ultrasonic pulse velocity *** show that the dynamic damage of UHPCC increases linearly with impact times and the abilities of repeated impact resistance of UHPCC are improved with increasing fiber volume *** stress waves on impact were recorded and the average stress,strain and strain rate of UHPCC were calculated based on the wave propagation *** effects of strain rate,fibers volume fraction and impact times on the stress-strain relations of UHPCC were *** show that the peak stress and elastic modulus decrease while the strain rate and peak strain increase gradually with increasing impact times.

关键词： ultra-high performance cementitious composites (UHPCC) split Hopkinson pressure bar (SHPB) repeated impact damage stress-strain

Dynamic Mechanical Behaviour of Ultra-high Performance Fiber Reinforced Concretes

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Journal of Wuhan University of technology(materials {2.) 2008年第6期23卷 938-945页

作者：赖建中 department of materials {2. & engineering Nanjing University of Science & Technology

Ultra-high performance fiber reinforced concretes （UHPFRC） were prepared by replacing 60% of cement with ultra-fine industrial waste powder. The dynamic mechanical behaviour of UHPFRC with different fiber volume fraction was researched on repeated compressive impact in four kinds of impact modes through split Hopkinson pressure bar （SHPB）. The experimental results show that the peak stress and elastic modulus decrease and the strain rate and peak strain increase gradually with the increasing of impact times. The initial material damage increases and the peak stress of the specimen decreases from the second impact with the increasing of the initial incident wave. Standard strength on repeated impact is defined to compare the ability of resistance against repeated impact among different materials. The rate of reduction of standard strength is decreased by fiber reinforcement under repeated impact. The material damage is reduced and the ability of repeated impact resistance of UHPFRC is improved with the increasing of fiber volume fraction.

关键词： ultra-high performance fiber reinforced concretes split Hopkinson pressurebar dynamic repeated impact

Performances of the High Strength Low Heat Pump Concrete (HLPC)

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Journal of Wuhan University of technology(materials {2.) 2002年第3期17卷 56-59页

作者：张云升 SoutheastUniversity

The effects of mineral admixtures on fluidity,mechanical and hydrational exothermic behavior were *** results show that,double adding ways,i e,fly ash and slag were added at the same time,not only improves the fluidity of fresh concrete with low W/B and compensates the lower early compressive strength of harden concrete caused by high adding amount of fly ash, but also greatly reduces the highest temperature rise, exothermic rate and total heat liberation of 3 day of binder pastes in HLPC, and postponed the arrival time of the highest temperature rise. HLPC was prepared and applied to project practice successfully.

关键词： mineral admixtures double adding ways high strength pump low hydration heat concrete

LiCoO_2.electrode/electrolyte interface of Li-ion batteries investigated by electrochemical impedance spectroscopy

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science china Chemistry 2007年第6期50卷 776-783页

作者： ZHUANG QuanChao1, 2. XU JinMei1, FAN XiaoYong1, wei GuoZhen1, DONG QuanFeng1 JIANG YanXia1, HUANG Ling1 & sun Shigang1 1 State Key Lab of Physical Chemistry of Solid Surfaces, {2. of Chemistry, Xiamen University, Xiamen 361005, china 2.School of materials science and engineering, china University of Mining & technology, Xuzhou 2.1116, china State Key Lab of Physical Chemistry of Solid Surfaces Department of ChemistryXiamen UniversityXiamen 361005China School of materials science and {2. China University of Mining and TechnologyXuzhou 221116China

The storage behavior and the first delithiation of LiCoO2.electrode in 1 mol/L LiPF6-EC:DMC:DEC elec- trolyte were investigated by electrochemical impedance spectroscopy (EIS). It has found that, along with the increase of storage time, the thickness of SEI film increases, and some organic carbonate lithium compounds are formed due to spontaneous reactions occurring between the LiCoO2.electrode and the electrolyte. When electrode potential is changed from 3.8 to 3.95 V, the reversible breakdown of the resistive SEI film occurs, which is attributed to the reversible dissolution of the SEI film component. With the increase of electrode potential, the thickness of SEI film increases rapidly above 4.2.V, due to overcharge reactions. The inductive loop observed in impedance spectra of the LiCoO2.electrode in Li/LiCoO2.cells is attributed to the formation of a Li1-xCoO2.LiCoO2.concentration cell. Moreover, it has been demonstrated that the lithium-ion insertion-deinsertion in LiCoO2.hosts can be well described by both Langmuir and Frumkin insertion isotherms, and the symmetry factor of charge transfer has been evaluated at 0.5.

关键词： Li-ion batteries, LiCoO2. EIS, SEI film, inductance

Triterpenoids-templated self-assembly nanosystem for biomimetic delivery of CRISPR/Cas9 based on the synergy of TLR-2.and ICB to enhance HCC immunotherapy

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Acta Pharmaceutica Sinica B 2024年第7期14卷 3205-3217页

作者： Bing-Chen Zhang Chun-Mei lai Bang-Yue Luo Jing-wei Shao Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy College of ChemistryFuzhou UniversityFuzhou 350116China department of Laboratory Medicine Dongguan Institute of Clinical Cancer Researchthe Tenth Affiliated Hospital of Southern Medical University(Dongguan People’s Hospital)Dongguan 523058China College of materials and Chemical engineering MinjiangUniversityFuzhou350108China

Combination immunotherapy has shown promising potential for enhancing the objective response rate compared to immune checkpoint blockade(ICB)***,combination therapy with multi-drugs is limited by the different properties of the agents and inconsistent synergistic targeted ***,based on a universal triterpene template and the anticancer active agent ursolic acid(UA),a cytomembrane-coated biomimetic delivery nanoplatform(UR@M)prepared by the selfassembly of a PD-L1 targeted CRISPR/Cas9 system and UA was designed for hepatocellular carcinoma(HCC)***@M showed enhanced tumor accumulation in vivo with homologous tumor targeting,and CRISPR in the nanosystem exhibited potent gene-editing efficiency of 76.53% in vitro and 62.42. in vivo with no off-target *** activated the natural immune system through the TLR-2.MyD88-TRAF6 pathway,which synergistically enhanced the proliferation of natural killer cells and dendritic cells and realized excellent immune cytotoxic T cell infiltration by combining with the ICB of *** strategy of work along both lines based on innate immune and adaptive immunity displayed a significant effect in tumor ***,the UA-templated strategy“killed three birds with one stone”by establishing a self-assembly nanosystem,inducing tumor cell death,and promoting synergistic immunostimulation for HCC treatment.

关键词： Ursolic acid Self-assembly Biomimetic nanoplatform Hepatocellular carcinoma CRISPR/Cas9 Immune checkpoint blockade Gene therapy Immunotherapy

TiO_(2.@C catalyzed hydrogen storage performance of Mg-Ni-Y alloy with LPSO and ternary eutectic structure

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Journal of Magnesium and Alloys 2024年第2期12卷 767-778页

作者： Wenjie Song Wenhao Ma Shuai He wei Chen Jianghua Shen Dalin sun Qiuming wei Xuebin Yu College of Mechanical and Electrical engineering Shaanxi University of Science and TechnologyXi’anShaanxi 710021China department of materials {2. Fudan UniversityShanghai 200438China School of Aeronautics Northwestern Polytechnical UniversityXi’anShaanxi 710072China department of Mechanical engineering&engineering science the University of North Carolina at CharlotteCharlotteNorth Carolina 28223United States of America

A designed Mg_(88.7)Ni_(6.3)Y_(5)hydrogen storage alloy containing 14H type LPSO(long-period stacking ordered)and ternary eutectic structure was prepared by regulating the alloy composition and *** hydrogen storage performance of the alloy was improved by adding nano-flower-like TiO_(2.@C *** decomposition of the LPSO structure during hydrogenation led to the formation of plenty of nanocrystals which provided abundant interphase boundaries and activation *** nanoscale TiO_(2.@C catalyst was uniformly dispersed on the surface of alloy particles,and the"hydrogen overflow''effect of TiO_(2.@C accelerated the dissociation and diffusion of hydrogen on the surface of the alloy *** a result,the in-situ endogenous nanocrystals of the LPSO structure decomposition and the externally added flower-like TiO_(2.@C catalyst uniformly dispersed on the surface of the nanoparticles played a synergistic catalytic role in improving the hydrogen storage performance of the Mg-based *** the addition of the TiO_(2.@C catalyst,the beginning hydrogen desorption temperature was reduced to 2.0℃.Furthermore,the saturated hydrogen absorption capacity of the sample was 5.32.wt.%,and it reached 4.2. wt.%H_(2. in 1 min at 2.0℃and 30 bar.

关键词： Hydrogen storage Mg LPSO TiO_(2.@C Synergistic catalysis

Atomically Dispersed Zinc Active Sites Efficiently Promote the Electrochemical Conversion of N_(2. to NH_(3)

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Energy & Environmental materials 2024年第3期7卷 175-181页

作者： Yanjiao wei Xinyu Wang Mengjie sun Min Ma Jian Tian Minhua Shao School of materials science and {2. Shandong University of Science and TechnologyQingdao 266590China department of Chemical and Biological engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong 999077China Energy Institute and Chinese National Engineering Research Center for Control&Treatment of Heavy Metal PollutionThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong China

At present,the research on highly active and stable nitrogen reduction reaction catalysts is still challenging work for the electrosynthesis of ammonia(NH_(3)).Herein,we synthesized atomically dispersed zinc active sites supported on N-doped carbon nanosheets(Zn/NC NSs)as an efficient nitrogen reduction reaction catalyst,which achieves a high ammonia yield of 46.62.g h^(-1)mg^(-1)_(cat).at-0.85 V(vs RHE)and Faradaic efficiency of 95.8%at-0.70 V(vs RHE).In addition,Zn/NC NSs present great stability and selectivity,and there is no significant change in NH_(3)rate and Faradaic efficiencies after multiple *** structural characterization shows that the active center in the nitrogen reduction reaction process is the Zn-N_(4)sites in the *** calculation confirms that Zn/NC with Zn-N_(4)configuration has a lower energy barrier for the formation of^(*)NNH intermediate compared with pure N-doped carbon nanosheets(N-C NSs),thus promoting the hydrogenation kinetics in the whole nitrogen reduction reaction process.

关键词： electrocatalysis nitrogen reduction single-atom catalyst Zn-N_(4)

Interface-induced polymerization strategy for constructing titanium dioxide embedded carbon porous framework with enhanced chemical immobilization towards lithium polysulfides

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Nano Research 2024年第3期17卷 1473-1481页

作者： Yue Ouyang Xiaoxiao Li Jiexin Zhu wei Zong Yuhang Dai Xuan Gao wei Zhang Shengyuan Yang Roohollah Bagherzadeh Feili {2. Yue-E Miao Tianxi Liu State Key Laboratory for Modification of Chemical Fibers and Polymer materials College of Materials Science and EngineeringDonghua University2999 North Renmin RoadShanghai 201620China The Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China Advanced Fibrous materials LAB Institute for Advanced Textile Materials and Technologies(ATMT)School of Advanced Materials and ProcessesAmirkabir University of TechnologyTehran 15914Iran Christopher Ingold Laboratory Department of ChemistryUniversity College London20 Gordon StreetLondon WC1H 0AJUK department of Chemistry KU LeuvenCelestijnenlaan 200FLeuven 3001Belgium

The shuttle effect induced by soluble lithium polysulfides(LiPSs)is known as one of the crucial issues that limit the practical applications of lithium-sulfur(Li-S)***,a titanium dioxide nanoparticle embedded in nitrogen-doped porous carbon nanofiber(TiO_(2.@NCNF)composite is constructed via an interface-induced polymerization strategy to serve as an ideal sulfur *** the protection of the nanofiber walls,the uniformly dispersed TiO_(2. nanocrystalline can act as capturing centers to constantly immobilize LiPSs towards durable sulfur ***,the mesoporous microstructure in the fibrous framework endows the TiO_(2.@NCNF host with strong physical reservation for sulfur and LiPSs,sufficient pathways for electron/ion transfer,and excellent endurance for volume *** expected,the sulfur-loaded TiO_(2.@NCNF composite electrode presents a fabulous rate performance and long cycle lifespan(capacity fading rate of 0.062.per cycle over 500 cycles)at 2.0 ***,the assembled Li-S batteries harvest superb areal capacity and cycling stability even under high sulfur loading and lean electrolyte conditions.

关键词： interface-induced polymerization electrospun porous nanofibers lithium-sulfur(Li-S)batteries high sulfur loading lithium polysulfides(LiPSs)immobilization

MOF‐derived 1D/3D N‐doped porous carbon for spatially confined electrochemical CO2.reduction to adjustable syngas

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Carbon Energy 2024年第8期6卷 1-13页

作者： wei Zhang Hui Li Daming Feng Chenglin Wu Chenghua sun Baohua Jia Xue Liu Tianyi Ma Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced materials Institute of Clean Energy ChemistryCollege of ChemistryLiaoning UniversityShenyangLiaoningChina School of science RMIT UniversityMelbourneVictoriaAustralia School of Pharmaceutical and Chemical engineering Taizhou UniversityTaizhouZhejiangChina department of Chemistry and Biotechnology Swinburne University of TechnologyHawthornVictoriaAustralia

Electrochemical reduction of CO_(2.to syngas(CO and H_(2.)offers an efficient way to mitigate carbon emissions and store intermittent renewable energy in ***,the hierarchical one‐dimensional/three‐dimensional nitrogen‐doped porous carbon(1D/3D NPC)is prepared by carbonizing the composite of Zn‐MOF‐74 crystals in situ grown on a commercial melamine sponge(MS),for electrochemical CO_(2.reduction reaction(CO_(2.RR).The 1D/3D NPC exhibits a high CO/H_(2.ratio(5.06)and CO yield(31 mmol g^(−1)h^(−1))at−0.55 V,which are 13.7 times and 2..4 times those of 1D porous carbon(derived from Zn‐MOF‐74)and N‐doped carbon(carbonized by MS),*** is attributed to the unique spatial environment of 1D/3D NPC,which increases the adsorption capacity of CO_(2.and promotes electron transfer from the 3D N‐doped carbon framework to 1D carbon,improving the reaction kinetics of CO_(2.*** results and charge density difference plots indicate that the active site of CO_(2.RR is the positively charged carbon atom adjacent to graphitic N on 1D carbon and the active site of HER is the pyridinic N on 1D *** presence of pyridinic N and pyrrolic N reduces the number of electron transfer,decreasing the reaction kinetics and the activity of CO_(2.*** CO/H_(2.ratio is related to the distribution of N species and the specific surface area,which are determined by the degree of spatial confinement *** CO/H_(2.ratios can be regulated by adjusting the carbonization temperature to adjust the degree of spatial confinement *** the low cost of feedstock and easy strategy,1D/3D NPC catalysts have great potential for industrial application.

关键词： electrochemical CO_(2.reduction reaction melamine sponge metal‐organic frameworks porous carbon syngas

Phase engineering of MXene Derivatives Via Molecular Design for High-Rate Sodium-Ion Batteries

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Energy & Environmental materials 2024年第05期7卷 126-134页

作者： Hui Zhang Xingwu Zhai Xin Cao Zhihao Liu Xinfeng Tang Zhihong Hu Hang Wang Zhandong Wang Yang Xu wei He wei Zheng Min Zhou Zheng Ming {2. Hefei National Laboratory for Physical sciences at the Microscale School of Chemistry and Materials Science University of Science and Technology of China School of materials science and {2. Southeast University National Synchrotron Radiation Laboratory University of Science and Technology of China department of Chemistry University College London School of Chemistry and Chemical engineering Southeast University

Since 2.19, research into MXene derivatives has seen a dramatic rise; further progress requires a rational design for specific functionality. Herein, through a molecular design by selecting suitable functional groups in the MXene coating, we have implemented the dual N doping of the derivatives,nitrogen-doped TiO2.nitrogen-doped carbon nanosheets （N-TiO2.NC）, to strike a balance between the active anatase TiO2.t low temperatures, and carbon activation at high temperatures. The NH3reduction environment generated at 400℃as evidenced by the in situ pyrolysis SVUV-PIMS process is crucial for concurrent phase engineering. With both electrical conductivity and surface Na+availability, the N-TiO2.NC achieves higher interface capacitive-like sodium storage with long-term stability. More than100 mAh g-1is achieved at 2.A g-1after 5000 cycles. The proposed design may be extended to other MXenes and solidify the growing family of MXene derivatives for energy storage.

关键词： high-rate sodium-ion batteries molecular design MXene derivative phase engineering