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A versatile synthetic strategy towards rare earth based metal-organic frameworks

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Science China Chemistry 2025年

作者： quan Shi Yun-Hao Xu Ming-Hui Chen Peng Zhao Wen-Bo Deng Ji Xiong Kai Guo Ya-qing feng Bao Zhang School of Chemical Engineering and Technology Tianjin University Tianjin Collaborative Innovation Center of Chemical Science and Engineering Guangdong Laboratory Chemistry & Fine Chemical Industry Jieyang Center

Rare earth metal-organic frameworks (RE-MOFs) have drawn wide attention owing to diverse network structures and various application ***,due to the unpredictable formation of the nodes,it is still challenging to design novel RE-MOFs.A novel versatile strategy was developed employing a RE-acetate complex (RE2(CH3COO)6·4H2O) as a precursor to construct RE-MOFs.2D RE-MOFs (RE-DBP) and 3D RE-MOFs (RE-TCPP) could be obtained by using dicarboxylic porphyrin ligands H2DBP and tetracarboxylic porphyrin ligands H2TCPP,*** RE-MOFs were further synthesized to verify the universality of the *** crystalline RE-MOFs could also be prepared at room temperature via the developed strategy,which could significantly promote large-scale preparation and practical application of *** proof of the concept,the performance of porphyrin-based RE-MOFs was investigated in the photocatalytic cycloaddition of CO2with *** the RE-DBP(Co) MOFs,Tb-DBP(Co) exhibited the best photocatalytic performance,which was also greater than that of the corresponding 3D MOF Tb-TCPP(Co) due to the optimal 2D structure and thus the accelerated photogenerated charge separation and transfer *** work not only provides a novel versatile strategy to design and develop RE-MOFs,but also proposes a promising approach for the potential bulk production of RE-MOFs at room temperature.

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A general solution for one dimensional chemo-mechanical coupled hydrogel rod

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Acta Mechanica Sinica 2018年第2期34卷 392-399页

作者： xing-quan Wang qing-Sheng yang Department of Engineering Mechanics Beijing University of Technology

Smart hydrogels are environmentally sensitive hydrogels, which can produce a sensitive response to external stimuli, and often exhibit the characteristics of multi filed coupling. In this paper, a hydrogel rod under chemomechanical coupling was analytically studied based on a poroelastical model. The already known constitutive and governing equations were simplified into the one dimensional case, then two different boundary conditions were considered. The expressions of concentration, displacement,chemical potential and stress related to time were obtained in a series form. Examples illustrate the interaction mechanism of chemical and mechanical effect. It was found that there was a balance state in the diffusion of concentration and the diffusion process could lead to the expansion or the stress change of the hydrogel rod.

关键词： Chemo-mechanical coupling Analytical solution One dimensional hydrogel rod

Surface-Enhanced Raman Spectroscopy:Principles,Methods,and Applications in Energy Systems

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Chinese Journal of Chemistry 2023年第3期41卷 355-369页

作者： quan-feng he Yu-Jin Zhang Zhi-Lan yang Jin-Chao dong xiu-Mei Lin Jian-feng Li State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringCollege of EnergyiChEMXiamen UniversityXiamenFujian361005 China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) XiamenFujian361005 China Department of Chemistry and Environment Science Fujian Province University Key Laboratory of Analytical ScienceMinnan Normal UniversityZhangzhouFujian363000 China Shenzhen Research Institute of Xiamen University ShenzhenGuangdong518000 China

Surface-enhanced Raman spectroscopy(SERS)has advanced significantly since its *** experimental and theoretical efforts have been made to understand the SERS effect and demonstrate its *** to its extremely high sensitivity and selectivity and ability to provide molecular fingerprint information,SERS has a wide range of applications in surface and interfacial chemistry,energy,materials,biomedicine,environmental analysis,*** review aims to provide readers with an understanding of the principles,methodologies,and applications of *** briefly introduce the fundamental theory of the SERS enhancement mechanism and summarize the details of the preparation of SERS-active *** applications of SERS in energy systems are then highlighted,including probing surface reactions and interfacial charge transfer of batteries and ***,the challenges and prospects of SERS research are discussed.

关键词： Surface-enhance Raman spectroscopy In situ characterization Li-ion batteries Water splitting Fuel cells

Hydrothermal synthesis and characterization of nano-petal nickel hydroxide

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Rare Metals 2015年第9期34卷 667-672页

作者： Wen-xiu he Yong-Qiang Zhang Qian-qing Liang Wen-quan Jiang Hai-feng Sun School of Chemistry Engineering Inner Mongolia University of Science and Technology Analysis & Measurements Research Center General Rearch Institute for Non-Ferrous Metals

The current article reports a preparation method of nano-petal nickel hydroxide, which was synthesized using urea as a precipitator by hydrothermal method. Nickel hydroxide samples with different microstructural characteristics were prepared by changing molar ratio of nickel/urea and reaction time. The prepared nickel hydroxide samples were characterized using X-ray diffraction(XRD) and scanning electron micrography(SEM).Electrochemical performances of the samples were then determined under charging–discharging rate of 0.2C. The influences of different conditions of the hydrothermal synthesis method on microstructure parameters of nickel hydroxide were analyzed, while relationships between microstructural characteristics parameters of nickel hydroxide and the electrochemical performances of nickel electrode were also explored.

关键词： Hydrothermal synthesis Nano-petal Electrochemical

High-entropy intermetallics:from alloy design to structural and functional properties

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Rare Metals 2022年第6期41卷 1989-2001页

作者： Hang Wang quan-feng he Yong yang Department of Mechanical Engineering City University of Hong KongHong Kong 999077China Department of Materials Science and Engineering.City University of hong Kong Hong Kong 999077China Department of Advanced Design and System Engineering.City University of hong Kong Hong Kong 999077China

Conventional intermetallics are strong but ***,multi-principal element intermetallics,also termed as high-entropy intermetallics(heIs)in the recent high-entropy alloy literature,are strong but malleable,some of which even show appreciable ductility and fracture toughness at room *** this article,we provide a focused review on the recent researches on heIs,from the fundamentals,such as the concept of heIs,the formation rules to the structural and functional properties of *** results hitherto reported clearly show that the heIs with distinct properties could be a promising material for future structural and functional applications.

关键词： Internetallics High-entropy alloys Phase formation Mechanical properties Functional properies

Effect of Sc on Al_(3)Fe phase and mechanical properties of as-cast AA5052 aluminum alloy

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China Foundry 2024年第3期21卷 257-264页

作者： yang Li qing Yu feng-feng Chen Jia-wen he hong-mei yang Meng-nie Li Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China

The AA5052 aluminum alloy is widely used in automobile and aerospace manufacturing,and with the development of light-weight alloys,it is required that these materials exhibit better mechanical *** studies have demonstrated that the addition of Sc to aluminum alloys can improve both the microstructure and properties of the *** this study,the effect of Sc on the Fe-rich phase and properties of the AA5052 aluminum alloy was studied by adding 0%,0.05%,0.2%,and 0.3%*** results show that with the increase of Sc,the coarse needle-like Fe-rich phase gradually transforms into Chinese-script and then nearly spherical particles,reduce the size of Fe-rich phase,and refine the grain with increase of high angle grain boundaries(HAGBs).These microstructure changes enhance the strength of the AA5052 alloy through Sc *** ductility of the alloy is obviously improved because the addition of a lower amount of Sc changes the morphology of Fe-rich phase from needle-like into a Chinese-script,and it is subsequently reduced as a result of significant increase in HAGBs with increasing Sc content.

关键词： AA5052 aluminum alloy Al3Fe phase mechanical properties grain boundary

Reference model of future ubiquitous convergent network and context-aware telecommunication service platform

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The Journal of China Universities of Posts and Telecommunications 2006年第3期13卷 50-56页

作者： QIAO xiu-quan LI Xiao-feng LIANG Shou-qing State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China

A reference model for future ubiquitous convergent network is analyzed. To provide user-centric, intelligent, personalized service, this article presents a context-aware telecommunication service platform （CaTSP） to adapt to dynamically changing context. This article focuses on the new design method of context-aware telecommunication service platform and its architecture. Through the use of model-driven architecture （MDA） and semantic web technologies, CaTSP can enable context reasoning and service personalization adaption. This article explores a new approach for service intelligence, personalization, and adaptability in the semantic web service computing era.

关键词： ubiquitous convergent network context-aware,telecommunication service platform ontology OWL OWL-S,model-driven architecture

Synthesis and Crystal Structure of a Zinc(II) Complex Salt with the Schiff Base of Picolinaldehyde N-oxide and Semicarbazone

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Chinese Journal of Structural Chemistry 2005年第11期24卷 1271-1275页

作者： YU qing ZHU Li-Gang BIAN he-dong DENG Ji-Hua yang Xiao-E GUO Gui-quan LIANG hong College of Chemistry and Chemical Engineering Guangxi Normal University Guilin Guangxi 541004 China

The title zinc（Ⅱ） complex salt [Zn（H2O）6]（ClO4）2-（PNOS）4, where PNOS is derived from picolinaldehyde N-oxide with semicarbazone, has been prepared and structurally characterized by X-ray single-crystal analysis. It crystallizes in triclinic, space group PI with a = 7.529（3）, b = 10.206（4）, c = 14.678（6）A, a = 86.293（6）, β= 87.686（7）, γ= 81.382（6）°, C28H44Cl2N16O22Zn, Mr = 1093.06, V = 1112.3（8） ,A^3 Z = 1, Dc = 1.632 g/cm^3, S = 1.089, μ（MoKa） = 0.773 mm^-1, F（000） = 564, the final R = 0.0438 and wR = 0.1076 for 3888 independent reflections with Rint = 0.0224. The crystal structure possesses a [Zn（H2O）6]^2＋ cation, two ClO4^- anions and four PNOSs. In the crystal structure, Zn^2＋ cation is located at the symcenter and coordinated by six water molecules. In [Zn（H2O）6]^2＋, an elongate octahedral complex cation, the average Zn-O bond length is 2.087（2） A. There exist a lot of H bonds in the structure, linking the cation [Zn（H2O）6]^2＋, anion ClO4^- and PNOS to form a 3D network.

关键词： zinc(Ⅱ) complex salt picolinaldehyde N-oxide semicarbazone crystal structure,Schiff base

Thermal-force control ability under variation of electromagnetic stick structure parameters in RPECT

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Journal of Iron and Steel Research International 2024年第1期31卷 224-236页

作者： Ting-song yang Wen-quan Sun feng-shan Du An-rui he quan yang National Engineering Research Center of Advanced Rolling and Intelligent Manufacturing University of Science and Technology BeijingBeijing100083China Institute of Engineering and Technology University of Science and Technology BeijingBeijing100083China College of Mechanical Engineering Yanshan UniversityQinhuangdao066004HebeiChina

Thermal-force driving of roll profile electromagnetic control technology(RPECT),which can be used to adjust the roll profile,can be affected by the sequential temperature rise between the electromagnetic stick(ES)and electromagnetic control *** to the limited space of ES and induction coil,the cross-sectional area of induction coil can be inevitably affected by changing the size of the ES induction zone,which can further change the energy input under the same electromagnetic parameters,the temperature rising effect and the bulging *** investigate this phenomenon,the effects of the radius of the induction zone on the thermal-force contribution ratio,the heating ability of ES and the temperature distribution were analyzed through an electromagnetic-thermal-structural finite element *** ensure that the results are applicable to RPECT,the thermal energy conversion ability and thermal-force roll crown control ability under different lengths of the induction zone were *** was found that whether the current density regulation mode or the current frequency regulation mode is adopted,the cases with 20 or 25 mm radius of the induction zone have the great thermal energy conversion ability and the good thermal-force roll crown control *** reasonable adjustment of the length of the induction zone can reduce the radius required for the maximum energy efficiency *** with the results of the simulation analysis,the optimization of ES based on the control ability maximization requirement is achieved,which provides the base for the design and configuration of ES in RPECT.

关键词： Roll profile electromagnetic control technology Electromagnetic stick Electromagnetic control roll Induction area Thermal-force driving