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Facile synthesis of high-entropy zirconate nanopowders and their sintering behaviors

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Journal of Advanced Ceramics 2023年第3期12卷 498-509页

作者： Lin tan Xinghua Su jingxin Yang Pengchao ji Fu Sun Qiang Tian Zhenhuan Zhao School of Materials Science and Engineering Chang’an UniversityXi’an 710061China State Key Laboratory of Environment-Friendly Energy Materials Southwest University of Science and TechnologyMianyang 621010China School of Advanced Materials and Nanotechnology Xidian UniversityXi’an 710126China

The challenge in synthesizing high-entropy ceramic(HEC)nanopowders is to suppress severe grain coarsening and particle agglomeration,which occur at elevated *** challenge could be addressed by the polyacrylamide gel *** this work,single-phase high-entropy(Lao.2Ndo.2Smo.2Gdo.2 Ybo.2)2Zr2O7 and(Lao.2Ndo.2Yo.2Euo.2Gdo.2)2Zr2O7 nanopowders without agglomeration were successfully synthesized using the polyacrylamide gel method for the first *** results showed that phase composition,particle size,and agglomeration degree of the nanopowders were greatly influenced by the molar ratio of acrylamide(AM)/Zr and calcination *** as-synthesized high-entropy zirconate(HEZ)nanopowders could be sintered into fully dense ceramics at 1500 C for 2 *** HEZ nanopowders showed a phase transformation from a defect-fluorite phase to a pyrochlore phase with the increase of sintering ***,two-step sintering of these nanopowders was conducted,and the HEZ ceramics with fine grains were *** polyacrylamide gel method is simple and easily operated,which is a facile approach of producing the HEC nanopowders with excellent sinterability.

关键词： high-entropy ceramics(HECs) nanopowders zirconate acrylamide(AM) sintering

PMODTRAN:a parallel implementation based on MODTRAN for massive remote sensing data processing

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International Journal of Digital Earth 2016年第9期9卷 819-834页

作者： Fang Huang ji Zhou jian Tao Xicheng tan Shunlin Liang jie Cheng School of Resources&Environment University of Electronic Science and Technology of ChinaChengduPeople’s Republic of China Institute of Remote Sensing Big Data Big Data Research CenterUniversity of Electronic Science and Technology of ChinaChengduPeople’s Republic of China Center for Computation&Technology Louisiana State UniversityBaton RougeLAUSA International School of Software Wuhan UniversityWuhanPeople’s Republic of China State Key Laboratory for Remote Sensing Science Research Center for Remote Sensing and GISSchool of GeographyBeijing Normal UniversityBeijingPeople’s Republic of China Department of Geographical Sciences University of MarylandCollege ParkMDUSA

MODerate resolution atmospheric TRANsmission(MODTRAN)is a commercial remote sensing(RS)software package that has been widely used to simulate radiative transfer of electromagnetic radiation through the Earth’s atmosphere and the radiation observed by a remote ***,when very large RS datasets must be processed in simulation applications at a global scale,it is extremely time-consuming to operate MODTRAN on a modern *** this circumstance,the use of parallel cluster computing to speed up the process becomes vital to this time-consuming *** paper presents PMODTRAN,an implementation of a parallel task-scheduling algorithm based on *** was able to reduce the processing time of the test cases used here from over 4.4 months on a workstation to less than a week on a local computer *** addition,PMODTRAN can distribute tasks with different levels of granularity and has some extra features,such as dynamic load balancing and parameter checking.

关键词： Parallel computing message passing interface MODTRAN thermal infrared remote sensing land-surface temperature retrieval

Rational design of MoS_(2)-based catalysts toward lignin hydrodeoxygenation:Interplay of structure,catalysis,and stability

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Journal of Energy Chemistry 2023年第2期77卷 601-631,I0015页

作者： Xinyong Diao Na ji School of Environmental Science and Engineering Tianjin Key Laboratory of Biomass/Wastes UtilizationTianjin UniversityTianjin 300350China

The MoS_(2)-based materials are a vital class of heterogeneous catalysts for the hydrodeoxygenation of lignin and its model compounds to produce value-added chemicals especially because of their unique selectivity to *** rational design of MoS_(2)-based catalyst greatly depends on the comprehensive understanding of its structure-activity ***,an intensive summary and critical analysis are still scarce to *** this review,we attempt to provide an in-depth understanding of the interplay of structure,catalysis,and stability of MoS_(2)-based catalysts for lignin *** recognition of intrinsic active sites on MoS_(2) structure was firstly discussed,followed by the illustration of MoS_(2)-catalyzed hydrodeoxygenation structural ***,based on the studies on the MoS_(2)-catalyzed lignin model compounds hydrodeoxygenation,the current active site modification strategies including structural modification of monometallic MoS_(2) catalysts and collaborative modification were summarized and emphatically discussed,which aims to elucidate the structure-activity relationship at the *** deactivation mechanism and stabilization strategies were also illustrated to provide instructive suggestion for the rational design of efficient and stable MoS_(2)-based ***,the real lignin depolymerization over MoS_(2)-based catalysts was summarized to point out the advantages and *** review attempts to highlight the remaining challenges and provide some perspectives for the future development of MoS_(2)-based catalysts for lignin hydrodeoxygenation.

关键词： Lignin hydrodeoxygenation MoS_(2)-based catalysts Structure-activity relationship Modification strategies Deactivation mechanism

Dispersive Property of Mode Grüneisen Parameter:Corundum andα-Quartz as Examples

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Chinese Physics Letters 1999年第4期16卷 249-250页

作者： XU ji-an Institute of Earth Sciences Academia SinicaNankang P.O.Box 1-55TaipeiTaiwan

The dispersive property of the mode Grüneisen parameter in solids is found *** a property should appear in a reciprocal relationship to the mode *** phenomenon is also confirmed experimentally in the cases of corundu... 详细信息

关键词： Grüneisen property Quartz

Modeling solubility of oxaprozin and irbesartan in biorelevant complex solutions based on a combination of pH-dependent and micellar solubilization models

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Chinese Journal of Chemical Engineering 2024年第8期72卷 34-43页

作者： Chen Shen Yuanhui ji jiangsu Province Hi-Tech Key Laboratory for Biomedical Research School of Chemistry and Chemical EngineeringSoutheast UniversityNanjing 211189China

Biological solubility is one of the important basic parameters in the development process of poorly soluble drugs,but the current measurement methods are mainly based on a large number of experiments,which are time-consuming and *** is still a lack of effective theoretical models to accurately describe and predict the biological solubility of drugs to reduce ***,in this study,osaprazole and irbesartan were selected as model drugs,and their solubility in solutions containing surfactants and biorelevant media was measured *** calculating the parameters of each component using the perturbed-chain statistical associating fluid theory(PC-SAFT)model,combined with pH-dependent and micellar solubilization models,the thermodynamic phase behavior of the two drugs was successfully modeled,and the predicted results were in good agreement with the experimental *** results demonstrate that the model combination used provides important basic parameters and theoretical guidance for the development and screening of poorly soluble drugs and related formulations.

关键词： Biorelevant media pH-dependent solubility Micellar solubilization PC-SAFT Active pharmaceutical ingredients

Enhancing the interfacial binding strength between modular stretchable electronic components

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National Science Review 2023年第1期10卷 49-67页

作者： Shaobo ji Xiaodong Chen Innovative Centre for Flexible Devices(iFLEX) Max Planck-NTU Joint Lab for Artificial SensesSchool of Materials Science and Engineering Nanyang Technological University Institute of Materials Research and Engineering(IMRE) Agency for Science Technology and Research

Stretchable electronics are emerging for personalized and decentralized clinics,wearable devices and human-machine ***,separated stretchable functional parts have been well developed and are approaching practical ***,the production of whole stretchable devices with full functions still faces a huge challenge:the integration of different components,which was hindered by the mechanical mismatch and stress/strain concentration at the connection *** avoid connection failure in stretchable devices,a new research focus is to improve the interfacial binding strength between different *** this review,recent developments to enhance interfacial strength in wearable/implantable electronics are introduced and catalogued into three major strategies:(ⅰ) covalent bonding between different device parts,(ⅱ) molecular interpenetration or mechanical interlocking at the interfaces and(ⅲ) covalent connection between the human body and *** reviewing current methods,we also discuss the existing challenges and possible improvements for stretchable devices from the aspect of interfacial connections.

关键词： stretchable electronics interfacial strength covalent bonding mechanical interlocking device–human interfaces

Limited value of procalcitonin,C-reactive protein,white blood cell,and neutrophil in detecting bacterial coinfection and guiding antibiotic use among children with enterovirus infection

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World Journal of Pediatrics 2022年第3期18卷 230-233页

作者： Rui-Mu Zhang Kun tan Shu Fu ji-Kui Deng Department of Infectious Diseases Shenzhen Children’s HospitalShenzhen 518038China

Procalcitonin(PCT),C-reactive protein(CRP),and white blood cell(WBC)have been used as markers of bacterial infection in children for *** studies have suggested PCT,CRP,WBC,and percentage of neutrophils(%N)may be useful in detecting bacterial infection in children[1-4].However,elevated levels of these biomarkers have also been noted in children with enterovirus infection[5-7].In a study involving 5692 hospitalized children with herpangina or hand,foot,and mouth disease(HFMD)in two periods of years,the medians of CRP were 50.1 and 42.5 mg/L,respectively.

关键词： enterovirus infection elevated

Trend of Developing Aqueous Liquid and Gel Electrolytes for Sustainable,Safe,and High‑Performance Li‑Ion Batteries

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Nano-Micro Letters 2024年第1期16卷 17-34页

作者： Donghwan ji Jaeyun Kim School of Chemical Engineering Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea Department of Health Sciences and Technology Samsung Advanced Institute for Health Sciences&Technology(SAIHST)Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea Biomedical Institute for Convergence at SKKU(BICS) Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea Institute of Quantum Biophysics(IQB) Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea Present Address:Department of NanoEngineering University of California San DiegoLa JollaSan DiegoCA 92093USA

Current lithium-ion batteries(LIBs)rely on organic liquid electrolytes that pose significant risks due to their flammability and *** potential for environmental pollution and explosions resulting from battery damage or fracture is a critical ***-based(aqueous)electrolytes have been receiving attention as an alternative to organic ***,a narrow electrochemicalstability window,water decomposition,and the consequent low battery operating voltage and energy density hinder the practical use of aqueous ***,developing novel aqueous electrolytes for sustainable,safe,high-performance LIBs remains *** Review first commences by summarizing the roles and requirements of electrolytes–separators and then delineates the progression of aqueous electrolytes for LIBs,encompassing aqueous liquid and gel electrolyte development trends along with detailed principles of the *** aqueous electrolytes are progressed based on strategies using superconcentrated salts,concentrated diluents,polymer additives,polymer networks,and artificial passivation layers,which are used for suppressing water decomposition and widening the electrochemical stability window of water of the *** addition,this Review discusses potential strategies for the implementation of aqueous Li-metal batteries with improved electrolyte–electrode interfaces.A comprehensive understanding of each strategy in the aqueous system will assist in the design of an aqueous electrolyte and the development of sustainable and safe high-performance batteries.

关键词： Lithium-ion battery(LIB) Aqueous electrolyte Gel electrolyte Electrochemical stability window Li dendrite

Flow characteristics of nonspherical granular materials simulated with multi-superquadric elements

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Particuology 2021年第1期19卷 25-36页

作者： Siqiang Wang Shunying ji State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of TechnologyDalian 116023China

The superquadric equation is typically used to mathematically describe nonspherical particles and construct particle shapes with different surface sharpness and aspect ***,nonspherical elements constructed using the superquadric equation are strictly convex,limiting their engineering *** this study,a multi-superquadric model based on a superquadric equation is *** model combines several superquadric elements that can be used to construct concave and convex particle *** tests are performed to examine the applicability of the multi-superquadric *** first involves a comparison of theoretical results for a single spherocylinder impacting a flat *** second involves the formation of a nonspherical granular *** third investigates the effects of the particle shape on the hopper discharge and angle of *** final test evaluates the mixing behaviors of granular materials within a horizontally rotating *** tests demonstrate the applicability of the multi-superquadric approach to nonspherical granular ***,the effects of particle shape on the packing density,discharge rate,angle of repose,and Lacey mixing index are *** indicate that concave particles have a lower packing density,flow rate,and mixing rate and higher angles of repose than convex *** of elements becomes more pronounced for concave particles and results in local cluster structures,thereby enhancing the stability of granular systems and limiting sliding or rotation between nonspherical particles.

关键词： Multi-superquadric approach Nonspherical elements Concave particles Discrete element method Granular materials