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A Measuring Solution for Mechanical Characteristics of MO Disks

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Wuhan University Journal of Natural Sciences 2001年第4期6卷 769-774页

作者： Pei Xian-deng Wang Hai-wei Xie Chang-sheng Liu Ben-xi national storage System Laboratory Huazhong Univ. of Sci. and Technol. Wuhan 430074 China

Mechanical characteristics of MO disk are vital for the designer of the drives and the manufacturers who provide the mass-product MO disks. So measuring mechanical characteristics is very significant. We compares the existing measuring methods and gives some novel measuring methods we adopted in details. The measuring system based upon these methods was introduced too. Some typical measuring results are also shown in this paper.

关键词： MO disk mechanical characteristics precision grating track counting laser triangulation method

Controllable assembly of nitrogen-doped mesoporous carbon with different pore structures onto CNTs for excellent lithium storage

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Nano Research 2023年第3期16卷 3879-3887页

作者： Haitao Li Xiao Fang Fengting Lv Wei Yu Hui Cheng Haijiao Zhang Institute of Nanochemistry and Nanobiology School of Environmental and Chemical EngineeringShanghai UniversityShanghai 200444China School of Environmental and Materials Engineering College of EngineeringShanghai Polytechnic UniversityShanghai 201209China Key Laboratory of Advanced energy Materials Chemistry(Ministry of education) Nankai UniversityTianjin 300071China

Mesoporous carbon nanomaterials have shown a great application potential in energy storage and conversion fields due to their outstanding conductivity,tunable pore structure,and good chemical ***,how to accurately control the pore structure,especially directly assembling the mesoporous carbon onto different substrates remains a big ***,we have successfully assembled two kinds of highly nitrogen-doped mesoporous carbon onto carbon nanotubes(NMC/CNTs)based on a facile cooperative assembly process assisted by triblock PEO_(20)PPO_(70)PEO_(20)(P123)and PEO_(106)PPO_(70)PEO_(106)(F127)*** experimental results indicate that the P_(123)/F_(127)mass ratio has a profound effect on the pore structure,leading to the formation of NMC/CNTs composites with spherical pore structure(S-NMC/CNTs)and cylindrical pore structure(CNMC/CNTs).In virtue of fast electron/ion transfer kinetics,the as-prepared S-NMC/CNTs anode demonstrates an excellent electrochemical performance for lithium-ion batteries,and it delivers a high reversible capacity of 588.1 mAh∙g^(−1)at the current of 0.1 A∙g^(−1)after 100 cycles,along with a superior cycling *** noted,the controlled assembly route developed in our work can also be applied to other support materials with different structures and compositions.

关键词： mesoporous carbon carbon nanotubes controllable assembly formation mechanism lithium-ion batteries

Decoupling of thermoelectric transport performance of Ag doped and Se alloyed tellurium induced by carrier mobility compensation

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Journal of Materials Science & Technology 2022年第6期101卷 71-79页

作者： Yue Wu Xiaofan Zhang Boyi Wang Jingxuan Liang Zipei Zhang Jiawei Yang Ximeng Dong Shuqi Zheng Huai-zhou Zhao State Key Laboratory of Heavy Oil Processing College of New Energy and MaterialsChina University of PetroleumBeijing 102249China Beijing national Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China

Alloying with Se is proved to be feasible to suppress the lattice thermal conductivity(κL)of tellurium by introducing multidimensional lattice ***,extra ionization impurity centers induced by Se alloying are harmful to the electric transport properties of the *** this paper,we propose that the incorporation of Ag could successfully compensate the lost carrier mobility(μH)due to Se alloying through the regulation of microstructure,resulting in the higher power factor(PF)than that of samples without *** composition optimization,theκLdecreased from 1.29 W m^(-1)K^(-1) of Te_(0.99)Sb_(0.01) to 1.05 W m^(-1)K^(-1) of Te_(0.94)Ag_(0.02)Se_(0.03)Sb_(0.01) at 350 K,while the PF remained unchanged or even slightly *** from the synergistic effect of carrier mobility compensation and phonon scattering,a maximum z T of 0.91 at 573 K and an average z T of 0.57(between 298 and 573 K)are achieved in Te_(0.94)Ag_(0.02)Se_(0.03)Sb_(0.01).This work presents a new strategy for decoupling the thermal and electric parameters of Te-based thermoelectric materials.

关键词： Te Ag doping Microstructure regulation Mobility compensation

Facile self-template fabrication of hierarchical nickel-cobalt phosphide hollow nanoflowers with enhanced hydrogen generation performance

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Science Bulletin 2019年第22期64卷 1675-1684页

作者： Xupo Liu Shaofeng Deng Peifang Liu Jianing Liang Mingxing Gong Chenglong Lai Yun Lu Tonghui Zhao Deli Wang Key Laboratory of Material Chemistry for energy Conversion and storage Ministry of EducationHubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China Analysis&Testing Center of Xin yang Normal University Xin yang 464000.China

Developing facile methods to construct hierarchical-structured transition metal phosphides is beneficial for achieving high-efficiency hydrogen evolution ***,a self-template strategy of hydrothermal treatment of solid Ni-Co glycerate nanospheres followed by phosphorization is delivered to synthesize hierarchical Ni Co P hollow nanoflowers with ultrathin nanosheet *** microstructure of Ni Co P can be availably tailored by adjusting the hydrothermal treatment temperature through affecting the hydrolysis process of Ni-Co glycerate nanospheres and the occurred Kirkendall *** from the promoted exposure of active sites and affluent mass diffusion routes,the HER performance of the Ni Co P hollow nanoflowers has been obviously enhanced in contrast with the solid Ni Co P *** fabricated Ni Co P hollow nanoflowers yield the current density of 10 m A cmà2at small overpotentials of 95 and 127 m V in 0.5 mol Là1H2SO4and 1.0 mol Là1KOH solution,***,the two-electrode alkaline cell assembled with the Ni Co P and Ir/C catalysts exhibits sustainable stability for overall water *** work provides a simple but efficient method to regulate the microstructure of transition metal phosphides,which is helpful for achieving high-performance hydrogen evolution catalysts based on solid-state metal alkoxides.

关键词： Self-template method Hydrolysis of glycerate nanospheres Kirkendall effect NiCoP hollow nanoflowers Hydrogen evolution reaction

Integrin-Mimetic Mechanosensory Elastomer with Fluorescence Probe for Monitoring Chain Deformation in Situ

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CCS Chemistry 2022年第3期4卷 1065-1073页

作者： Chao Li Xiqi Zhang Longfei Luo Lei Jiang Longcheng Gao Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of education Key Laboratory of Beijing EnergySchool of ChemistryBeihang UniversityBeijing 100191 Key Laboratory of Bio-Inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190 Beijing national Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871

Mechanosensory elastomers attract intense interests in the academic and industrial ***,molecular insight of macroscopic properties remains a significant ***,we build up a correlation between the microscopic and macroscopic level by designing a mechanosensory elastomer with aggregation-induced emission luminogens(AIEgens)that monitors chain deformation in *** key constituents are the mechanosensory units,which are dynamic dimers bonded by ureidopyrimidinone(UPy)groups and tetraphenylethylene(TPE)for the fluorescence signal *** photoluminescence(PL)technique successfully monitors elastomer chain deformation under external *** PL intensity increases linearly at low elongation,in excellent agreement with Hooke’s law for ideal *** deviation from linear PL intensity is measured at high elongation,which can be theoretically described by the Langevin function.A correlation between the microscopic and the macroscopic level is then built.

关键词： biomimetic mechanosensory elastomer conformation AIE

Building the bridge of small organic molecules to porous carbons via ionic solid principle

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Nano Research 2023年第1期16卷 80-87页

作者： Lei Tong Qian-Qian Yang Shuai Li Le-Le Zhang Wei-Jie Zeng Yan-Wei Ding Liangdong Fan Hai-Wei Liang Department of New energy Science and Technology College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060China Hefei national Research Center for Physical Sciences at the Microscale Department of ChemistryUniversity of Science and Technology of ChinaHefei 230026China

Replacing traditional polymer-based precursors with small molecules is a promising pathway toward facile and controllable preparation of porous carbons but remains a prohibitive challenge because of the high volatility of small ***,a simple,general,and controllable method is reported to prepare porous carbons by converting small organic molecules into organic molecular salts followed by *** robust electrostatic force holding organic molecular salts together leads to negligible volatility and thus ensures the formation of carbons under high-temperature ***,metal moieties in organic molecular salts can be evolved into in-situ templates or activators during pyrolysis to create *** modular nature of organic molecular salts allows easy control of the porosity and chemical doping of carbons at a molecular *** sulfur-doped carbon prepared by the ionic solid strategy can serve as robust support to prepare small-sized intermetallic PtCo catalysts,which exhibit a high mass activity of 1.62 A·mgPt^(−1)in catalyzing oxygen reduction reaction for fuel cell applications.

关键词： porous carbon small organic molecules organic molecular salts ionic solid oxygen reduction reaction

Priority-based Residential Demand Response for Alleviating Crowding in Distribution Systems

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Journal of Modern Power Systems and Clean energy 2023年第2期11卷 502-510页

作者： Venkateswarlu Gundu Sishaj P.Simon Vemalaiah Kasi Narayana Prasad Padhy Dheeraj Kumar Khatod Department of Computer Science and Engineering Koneru Lakshmaiah Education Foundation GunturGunturIndia Department of Electrical and Electronics Engineering National Institute of Technology TiruchirappalliTiruchirappalliIndia Department of Electrical Engineering(EED) Indian Institute of Technology Roorkee(IITR)RoorkeeIndia

The dynamic pricing environment offers flexibility to the consumers to reschedule their switching *** the dynamic pricing environment results in several benefits to the utilities and consumers,it also poses some *** crowding among residential customers is one of such *** scheduling of loads at low-cost intervals causes crowding among residential customers,which leads to a fall in voltage of the distribution system below its prescribed *** order to prevent crowding phenomena,this paper proposes a priority-based demand response program for local energy *** the program,past contributions made by residential houses and demand are considered as essential parameters while calculating the priority *** non-linear programming(NLP)model proposed in this study seeks to reschedule loads at low-cost intervals to alleviate crowding *** the NLP model does not guarantee global optima due to its non-convex nature,a second-order cone programming model is proposed,which captures power flow characteristics and guarantees global *** proposed formulation is solved using General Algebraic Modeling System(GAMS)software and is tested on a 12.66 kV IEEE 33-bus distribution system,which demonstrates its applicability and efficacy.

关键词： Crowding strategy demand response distribution system General Algebraic Modeling System(GAMS) local energy community second-order cone programming

Unveiling non-radiative center control in CsPbBr_(3) nanocrystals:A comprehensive comparative analysis of hot injection and ligandassisted reprecipitation approaches

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Nano Research 2024年第5期17卷 4525-4534页

作者： Daocheng Hong Yuchen Zhang Shuhan Pan Hanyu Liu Wei Mao Wanli Zhang Yuhui Ye Zhihong Wei Xuxing Lu Xiaoyong Wang Zhenda Lu Yuxi Tian Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of TechnologyYancheng 224051China Laboratory of Mesoscopic Chemistry of MOE School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China College of Engineering and Applied Sciences Nanjing UniversityNanjing 210023China national Laboratory of Solid State Microstructures School of PhysicsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China School of Electronic Electrical Engineering and PhysicsFujian University of TechnologyFuzhou 350118China

Metal-halide perovskite nanocrystals(NCs)have gained significant attention in the field of optoelectronic and photonic devices due to their promising *** their exceptional optical properties,the impact of different synthetic strategies on the fundamental nature of NCs,such as nonradiative recombination centers,remains poorly *** this study,we investigated the photophysical properties of CsPbBr_(3) NCs synthesized using two distinct methods,hot injection and ligand-assisted reprecipitation,at the individual particle *** observed different blinking behaviors under specific photoexcitation power densities and proposed,through intensity-lifetime analysis and Monte-Carlo simulations,that these different synthetic strategies can fabricate NCs with similar crystal structures but distinct surface quenchers with varying energy levels,which significantly affected the photo-induced blinking-down and blinking-up behaviors in individual *** findings indicate a practical and feasible approach for controlling defect engineering in perovskite NCs,with significant implications for their use in optoelectronic and other technological applications.

关键词： metal-halide perovskite nanocrystals photophysical properties nonradiative recombination centers hot injection method ligand-assisted reprecipitation

Reactive incorporation of Ag into porous TiO2 coating and its influence on its microstructure, in vitro antibacterial efficacy and cytocompatibility

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Progress in Natural Science:Materials International 2021年第2期31卷 215-229页

作者： Xinxin Zhang You Lv Guangyi Cai Shan Fu Lei Yang Yanlong Ma Zehua Dong Key Laboratory of Material Chemistry for energy Conversion and storage Ministry of Education Hubei Key Laboratory of Material Chemistry and Service Failure School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Key Lab.for Anisotropy and Texture of Materials Education Ministry of China School of Materials Science and Engineering Northeastern University College of Materials Science and Engineering Chongqing University of Technology

Ag-doped TiO2coatings were successfully fabricated on Ti using plasma electrolytic oxidation(PEO) in the electrolytes containing Ag or Ag2O nanoparticles(NPs). The results showed that the different Ag sources resulted in significant variations of morphology, composition and chemical state. The thermal decomposition of Ag2O during PEO process contributed to the formation of Ag NPs, which might reactively incorporate into TiO2, leading to the presence of a Ca, P-rich amorphous layer between entrapped Ag NPs and the peripheral TiO2. By contrast,Ag specie tends to be present as micro-sized clusters consisting of metallic Ag NPs in the PEO coating fabricated via Ag NPs addition. The different microstructures inevitably affected the Ag ionic release behaviour and thus antibacterial capabilities and cytocompatibilities. It is indicated that the application of Ag2O NPs as Ag source is promising to fabricate Ag-doped PEO coating with both long-term antibacterial activity and acceptable cytocompatibility.

关键词： Ag source Ag 2 O nanoparticles Plasma electrolytic oxidation Titanium Antibacterial