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Point Defect Engineering Boosting the Thermoelectric Properties of Layered 122 Zintl Compounds

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Chinese Journal of Structural Chemistry 2020年第5期39卷 815-820页

作者： GUO Kai huo Hao-Jie LUO Jun School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Materials Genome Institute Shanghai UniversityShanghai 200444China

The layered 122 Zintl compounds have become an intriguing class of thermoelectric materials due to the promising electronic transport properties and inherently low thermal conductivity,showing the typical characteristics of"phonon-glass electron-crystal".Owing to the unprecedented performance tunability,the thermoelectric properties of the layered-structure compounds are completive with some traditional thermoelectric *** defects involving vacancy,aliovalent doping and equivalent alloying atoms have been introduced to further enhance the thermoelectric *** review emphasizes the effects of various point defects on the thermoelectric parameters,and provides perspective on the strategies for increasing the thermoelectric figure of merit zT,which are believed to be applicable for improving the thermoelectric properties of many other compounds.

关键词： layered structure 122 Zintl phase point defect orbital alignment phonon scattering thermoelectric properties

Synergistic silver-mediated and palladium-catalyzed nondirected olefination of aryl C–H bond: quick access to multi-substituted aryl olefins

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Science China Chemistry 2024年第3期67卷 882-889页

作者： Jian Yao Lili Shao Xiaohong huo Xiaoming Wang Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Frontiers Science Center for Transformative MoleculesSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Organometallic Chemistry Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 20032China School of Chemistry and Materials Science Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China

Transition metal-catalyzed olefination of aryl C-H bond is a powerful tool for the synthesis of alkenes. While the Pd-catalyzed oxidative C-H olefination of arenes, also known as Fujiwara-Moritani reaction, has been established as one of the most efficient methods, the substrates are largely limited to terminal olefins with electron-withdrawing group(s). Herein, we report a synergistic silver-mediated and palladium-catalyzed non-directed C-H olefination of arenes with vinyl(pseudo)halides, which offers a complementary strategy to the typical Fujiwara-Moritani reaction. The reactions proceeded well for a variety of halogenated arenes, heteroarenes, and olefin substrates, providing an efficient access to various multi-substituted aryl olefins, including trisubstituted/tetrasubstituted olefins and several complex olefins derived from medicines or natural products. Mechanistic studies indicated a bimetallic Pd/Ag cooperation is operative in the catalysis, i.e., the reaction is initiated by aryl C-H bond cleavage via ligation with phosphine/Ag species, followed by transferring of the aryl moiety to a vinyl palladium intermediate,which is in turn formed by oxidative addition of vinyl(pseudo)halide to a Pd complex. This method enables the synthesis of a wide range of challenging multi-substituted vinyl products from simple arenes(directing-group free) in a streamlined and controllable fashion.

关键词： direct C–H olefination multi-substituted aryl alkenes bimetallic Pd/Ag cooperation C–H functionalization

Upper Hybrid Resonance of Microwaves with a Large Magnetized Plasma Sheet

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Plasma Science and Technology 2013年第10期15卷 979-984页

作者： huo Wenqing GUO Shijie DING Liang XU Yuemin Center for Space Science and Applied Research Chinese Academy of SciencesBeijing 100190 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

A large magnetized plasma sheet with size of 60 cm×60 cm×2 cm was generated by a linear hollow cathode discharge under the confinement of a uniform magnetic field generated by a Helmholtz Coil. The microwave transmission characteristic of the plasma sheet was measured for different incident frequencies, in cases with the electric field polarization of the incident microwave either perpendicular or parallel to the magnetic field. In this measurement, parameters of the plasma sheet were changed by varying the discharge current and magnetic field intensity. In the experiment, upper hybrid resonance phenomena were observed when the electric field polarization of the incident wave was perpendicular to the magnetic field. These resonance phenomena cannot be found in the case of parallel polarization incidence. This result is consistent with theoretical consideration. According to the resonance condition, the electron density values at the resonance points are calculated under various experimental conditions. This kind of resonance phenomena can be used to develop a specific method to diagnose the electron density of this magnetized plasma sheet apparatus. Moreover, it is pointed out that the operating parameters of the large plasma sheet in practical applications should be selected to keep away from the upper hybrid resonance point to prevent signals from polarization distortion.

关键词： magnetized plasma sheet upper hybrid resonance microwave

THE GENERALIZED LOWER ORDER OF DIRICHLET SERIES

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Acta Mathematica Scientia 2020年第4期40卷 1141-1151页

作者： Qingyuan CHEN Yingying huo School of Mathematics Guangdong University of TechnologyGuangzhou 510006China

In this paper,we study the generalized lower order of entire functions defined by Dirichlet *** constructing the Newton polygon based on Knopp-Kojima’s formula,we obtain a relation between the coefficients of the Dir... 详细信息

关键词： Dirichlet series Knopp-Kojima method Newton polygon generalized lower order

Intensifying electrified flow-through water treatment technologies via local environment modification

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Frontiers of Environmental Science & Engineering 2024年第6期18卷 17-25页

作者： Zheng-Yang huo Xiaoxiong Wang Xia Huang Menachem Elimelech School of Environment and Natural Resources Institute of Ecological CivilizationRenmin University of ChinaBeijing 100872China Institute for Ocean Engineering Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Center of Double Helix Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Department of Chemical and Environmental Engineering Yale UniversityNew HavenCT 06520-8286USA

Removing high-risk and persistent contaminants from water is challenging,because they typically exist at low concentrations in complex water *** flow-through technologies are viable to overcome the limitations induced by mass transport for efficient contaminant *** the local environment of the flow-through electrodes offers opportunities to further improve the reaction kinetics and selectivity for achieving near-complete removal of these contaminants from ***,we present state-of-the-art local environment modification approaches that can be incorporated into electrified flow-through technologies to intensify water *** first show methods of nanospace incorporation,local geometry adjustment,and microporous structure optimization that can induce spatial confinement,enhanced local electric field,and microperiodic vortex,respectively,for local environment *** then discuss why local environment modification can complement the flow-through electrodes for improving the reaction rate and ***,we outline appropriate scenarios of intensifying electrified flow-through technologies through local environment modification for fit-for-purpose water treatment applications.

关键词： Point-of-use water treatment Electrified membrane Advection-enhanced mass transport Water decontamination and disinfection Emerging contaminants

Approaches to promoting bone marrow mesenchymal stem cell osteogenesis on orthopedic implant surface

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World Journal of Stem Cells 2020年第7期12卷 545-561页

作者： Shi-Cheng huo Bing Yue Department of Bone and Joint Surgery Renji HospitalShanghai Jiao Tong University School of MedicineShanghai 200011China

Bone marrow-derived mesenchymal stem cells(BMSCs)play a critical role in the osseointegration of bone and orthopedic ***,osseointegration between the Ti-based implants and the surrounding bone tissue must be improved due to titanium’s inherent *** modification stands out as a versatile technique to create instructive biomaterials that can actively direct stem cell ***,we summarize the current approaches to promoting BMSC osteogenesis on the surface of titanium and its *** will highlight the utilization of the unique properties of titanium and its alloys in promoting tissue regeneration,and discuss recent advances in understanding their role in regenerative *** aim to provide a systematic and comprehensive review of approaches to promoting BMSC osteogenesis on the orthopedic implant surface.

关键词： Bone marrow mesenchymal stem cells Osseointegration Orthopedic implant Biofunctionalization

Sensitivity Analysis of the Effect of Speed and Inclination Angle on Water-Entry Slamming Pressure of the Bow

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维普期刊数据库

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China Ocean Engineering 2020年第3期34卷 432-440页

作者： ZHANG Jian YOU Yun YAO Zhi huo Fa-li Jiangsu University of Science and Technology Zhenjiang 212003China Shanghai Merchant Ship Design&Research Institute Shanghai 201203China

In this paper,a method about the water-entry slamming of a two-dimensional(2D)bow structure has been proposed based on the experimental and simulation *** to this method,the sensitivity analysis has been carried out about the effect of speed and inclination angle on the slamming pressure of the ***,a 2D ship bow experimental model was performed to obtain the slamming pressure distribution at different measuring points under different ***,numerical simulation for the water-entry slamming of this experimental model was conducted to obtain the pressure distribution on the experimental model under different working ***,the experimental results were compared with the numerical simulation results to evaluate the effect of speed and inclination angle on the slamming pressure of the *** results show that the slamming pressure is more sensitive to speed variation within the low-speed *** effect of inclination angle on the slamming pressure is more obvious in the small angle *** the inclination angle is larger than 45°,the effect is limited.

关键词： model test numerical simulation water-entry slamming rigid body

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Main Abstracts

学术研究 2014年第9期 159-160页

作者： huo Shuquan

The application of microfluidic-based technologies in the cycle of metabolic engineering

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Synthetic and Systems Biotechnology 2016年第3期1卷 137-142页

作者： Xiaoyan Ma Yi-Xin huo College of Life Science Beijing Institute of Technology5 South Zhongguancun StreetHaidian DistrictBeijing100081China

The process of metabolic engineering consists of multiple cycles of design,build,test and learn,which is typically laborious and *** increase the efficiency and the rate of success of strain engineering,novel instrumentation must be ***,the control of liquid flow in microstructures,has enabled flexible,accurate,automatic,and high-throughput manipulation of cells in liquid at picoliter to nanoliter *** attributes hold great promise in advancing metabolic engineering in terms of the phases of design,build,test and *** promote the application of microfluidic-based technologies in strain improvement,this review addressed the potentials of microfluidics and the related approaches in DNA assembly,transformation,strain screening,genotyping and phenotyping,and highlighted their adaptations for single-cell *** a result,this facilitates in-depth understanding of the metabolic network,which in turn promote efficient optimization in the following cycles of strain *** together,microfluidic-based technologies enable on-chip workflow,and could greatly accelerate the turnaround of metabolic engineering.

关键词： Metabolic engineering Microfluidics High-throughput Single-cell analysis