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多功能荧光探针的设计、合成与应用研究进展

有机化学 2019年第7期39卷 1846-1857页

作者：陈思鸿庞楚明陈孝云严智浩黄诗敏李香弟钟雅婷汪朝阳华南师范大学化学与环境学院教育部环境理论化学重点实验室广州510006 江苏科技大学环境与化学工程学院镇江212003

多功能荧光探针可检测多个阴阳离子、小分子等,相对于单分析的荧光探针能提高检测效率、降低分析成本,故广受关注.根据分子结构特点,将多功能荧光探针分为有机小分子型、聚合物型和金属有机配合物型等三大类,从检测对象和性能出发,重点... 详细信息

多功能荧光探针可检测多个阴阳离子、小分子等,相对于单分析的荧光探针能提高检测效率、降低分析成本,故广受关注.根据分子结构特点,将多功能荧光探针分为有机小分子型、聚合物型和金属有机配合物型等三大类,从检测对象和性能出发,重点综述了近几年国内外多功能荧光探针在分子设计、合成与检测应用等方面的新进展,并展望了多功能荧光探针的发展潜力,指出开发能够在同体系中同时识别多个分析物的探针是未来研究中的重点方向.

关键词：多功能荧光探针设计与合成检测机理传感应用

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多孔有机聚合物材料的合成与荧光传感应用

有机化学 2018年第10期38卷 2606-2624页

作者：庞楚明罗时荷郝志峰高健黄召昊余家海余思敏汪朝阳华南师范大学化学与环境学院教育部环境理论化学重点实验室广州510006 广东工业大学轻工化工学院广州510006

多孔有机聚合物荧光材料既具有孔隙度高的特点,也具有突出的荧光性能.当其骨架上存在与特定分析物(如硝基芳香爆炸物、金属离子、阴离子等)的结合位点时,便赋予其荧光传感的功能.按照不同多孔有机聚合物(POPs)材料的类型,即无定型的多... 详细信息

多孔有机聚合物荧光材料既具有孔隙度高的特点,也具有突出的荧光性能.当其骨架上存在与特定分析物(如硝基芳香爆炸物、金属离子、阴离子等)的结合位点时,便赋予其荧光传感的功能.按照不同多孔有机聚合物(POPs)材料的类型,即无定型的多孔有机聚合物材料、晶型含配位键的多孔金属有机框架(MOFs)材料、晶型共价有机框架(COFs)材料,综述了近年来多孔有机聚合物荧光材料的研究新进展,特别是它们基于有机功能分子的设计与合成,及其荧光传感应用.继续从分子层面设计新型的荧光COFs材料是未来可循环使用的高效荧光化学传感器的发展方向,值得关注.

关键词：多孔有机聚合物材料设计与合成荧光传感应用硝基芳香爆炸物检测晶型共价有机框架材料

Effect of heat treatment on the microstructure and mechanical properties of a multidirectionally forged Mg-Gd-Y-Zn-Zr-Ag alloy

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Journal of Magnesium and Alloys 2023年第6期11卷 2042-2053页

作者： Junkai Wang chuming Liu Shunong Jiang Yingchun Wan Zhiyong Chen School of Materials Science and Engineering Central South UniversityChangsha 410083China State Key Laboratory for Powder Metallurgy Central South UniversityChangsha 410083China School of Materials Science and Engineering Hunan University of Science and TechnologyXiangtan 411201China

Multidirectional forging(MDF)was successfully applied to fabricate large-size Mg-Gd-Y-Zn-Zr-Ag alloy in this work and effects of T4,T5 and T6 treatments on the microstructure and mechanical properties of the as-forged alloy were *** show that dynamic recrystallization(DRX)occurs and second phase particles precipitate along the grain boundary during the MDF *** annealing treatment(T4),the volume fraction and size of dynamic precipitates slightly increase at a lower temperature(430℃)compared with those of MDFed sample,while they are dissolved into theα-Mg matrix at a higher temperature(450℃).At the meantime,short plate-shaped long-period stacking ordered(LPSO)phases are observed in the DRX grains of the MDFed sample and then dissolved into theα-Mg matrix during annealing at both *** basal texture is identified in the MDFed sample,but the basal pole tilts away from final forging direction and rare-earth texture component withorientation parallel to penultimate forging direction becomes visible after *** T6 sample annealing at 430℃for 4 h and ageing at 200℃for 34 h exhibits the superior strength and ductility in this *** ultimate tensile strength,tensile yield strength and elongation to failure,which is 455 MPa,308 MPa and 7.7%,respectively,are overall improved compared with the directly-aged(T5)*** paper provides a superior heat treatment schedule to manufacture high-performance large-scale Mg-Gd-Y-Zn-Zr-Ag components for industrial production.

关键词： Mg-Gd-Y-Zn-Zr-Ag alloy Multidirectional forging Dynamic precipitation Heat treatment Mechanical properties

Deformation mechanism,orientation evolution and mechanical properties of annealed cross-rolled Mg-Zn-Zr-Y-Gd sheet during tension

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Journal of Magnesium and Alloys 2023年第7期11卷 2340-2350页

作者： Xia Lin Zhiyong Chen Jianbo Shao Jiangying Xiong Zhang Hu chuming Liu School of Materials Science and Engineering Central South UniversityChangsha 410083China

Mg-6.75Zn-0.57Zr-0.4Y-0.18Gd(wt.%)sheet with typical basal texture was produced by cross rolling and *** temperature tensile tests were subsequently conducted along rolling direction(RD),transverse direction(TD),and diagonal direction(RD45).Deformation mechanism and orientation evolution during the tension were investigated by quasi-in-situ electron backscatter diffraction observation and in-grain misorientation axis *** results indicate that the activation of deformation mechanism mainly depends on the initial grain *** RD sample,prismaticslip plays an important role in the deformation of grains withaxis nearly perpendicular to the *** theaxis gradually tilted towards the RD,basalslip becomes the dominant deformation *** the tensile fracture,the initial concentrically distributed{0001}pole is split into double peaks extending perpendicular to the RD,and the randomly distributed{1010}pole becomes parallel to the *** evolution in{0001}and{1010}poles during tension is related to the lattice rotation induced by basalslip and prismaticslip,*** and RD45 samples exhibit similar deformation mechanism and orientation evolution as the RD sample,which results in the nearly isotropic mechanical properties in the annealed cross-rolled sheet.

关键词： Magnesium alloys Deformation mechanism Orientation evolution Mechanical properties

Formation of nanocrystalline AZ31B Mg alloys via cryogenic rotary swaging

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Journal of Magnesium and Alloys 2023年第5期11卷 1580-1591页

作者： Xin Chen chuming Liu Yingchun Wan Shunong Jiang Xiuzhu Han Zhiyong Chen Light Alloy Research Institute Central South UniversityChangsha 410083China School of Materials Science and Engineering Central South UniversityChangsha 410083China School of Metallurgy and Environment Central South UniversityChangsha 410083China Beijing Institute of Spacecraft System Engineering Beijing 100094China

A bulk nanocrystalline AZ31B Mg alloy with extraordinarily high strength was prepared via cryogenic rotary swaging in this *** obtained alloy shows finer grains,higher strength,and a negligible tension-compression yield asymmetry,compared with that prepared via room-temperature rotary *** electron microscopy investigations showed that at the initial stage,multiple twins,mostly tension twins,were activated and intersected with each other,thereby refining the coarse grains into a fine lamellar ***,two types of nanoscale subgrains were generated with increasing swaging *** first type of nanoscale subgrain contained twin boundaries and low-angle grain *** type of subgrain appeared at the twin-twin intersections and was mainly driven by high local *** second type of nanoscale subgrain was formed within the twin *** boundaries of this type of subgrain did not contain twin boundaries and were transformed from massive dislocation ***,randomly oriented nanograins were obtained via dynamic recrystallization,under the combined function of deformation heat and increased stored *** with room-temperature rotary swaging,cryogenic rotary swaging exhibits a slower grain refinement process but a remarkably enhanced grain refinement effect after the same five-pass swaging.

关键词： Cryogenic rotary swaging Nanocrystalline Mg alloy Grain refinement Twinning Dislocation arrays

Analysis of energy consumption characteristics of hydraulic system for wrecker truck based on CPR

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High Technology Letters 2018年第1期24卷 82-89页

作者：晁智强 Ning chuming Shen Wei Li Huaying Han Shousong Department of Mechanical Engineering Academy of Armored Force Engineering Beijing 100072 P. R. China School of Mechanical Engineering University of Shanghai for Science and Technology Shanghai 200093 P.R. China

In order to solve problems associated with high heat production,high-energy consumption and low efficiency for the hydraulic system of the working device in a wrecker truck,a hydraulic energysaving system based on common pressure rail( CPR) is proposed. A hydraulic transformer is utilized to control the actuators by analyzing energy-consumption characteristics of valve controlled hydraulic system in a wrecker truck. By analyzing the energy-saving principle of a hydraulic energy-saving system,a relevant mathematical model is established. A comparison is performed between the energysaving hydraulic system and valve controlled hydraulic system in a wrecker truck within the same work period for operating efficiency and energy consumption. Results show that hydraulic energysaving system of the wrecker truck has better controlling performance and efficiency of about 18%higher than the valve controlled hydraulic system. Energy-saving ratio for total energy consumption in this system reaches 51. 46%,demonstrating energy-saving effect of the system.

关键词： common pressure rail (CPR) hydraulic transformer energy saving wreckertruck

The effect of LPSO on the deformation mechanism of Mg-Gd-Y-Zn-Zr magnesium alloy

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Journal of Magnesium and Alloys 2016年第2期4卷 83-88页

作者： Jianbo Shao Zhiyong Chen Tao Chen Zhang Hu Xiaojie Zhou chuming Liu School of Materials Science and Engineering Central South UniversityChangsha 410083China

The tensile deformation behavior and corresponding microstructure evolution of the Mg-4.7Gd-3.4Y-1.2Zn-0.5Zr(at.%)magnesium alloy with long period stacking structure(LPSO)are studied by electron backscatter diffraction(EBSD)and slip lines *** results show that less and very small size of twins is observed in the grains with high value of Schmid factor for twinning,which indicates that the growth of the{10–12}twinning deformation is prevented by the LPSO *** prismatic lines present in grains of which the prismatic slip Schmid factor is above *** favorable orientation and LPSO phase synergistically promote the activation of prismatic *** inhomogeneous rotation of the grains during deformation is the reason for the microcrack at grain boundary.

关键词： Rare earth magnesium alloys LPSO Deformation mechanism Crystal orientation

Electrochemical Activation-Induced Structural Transformation in Ni(OH)_(2)/Ti_(3)C_(2)T_(x)/NF Systems with Enhanced Electrochemical Performance for Hybrid Supercapacitors

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Energy & Environmental Materials 2024年第4期7卷 277-284页

作者： chuming Xu Lu Dai Yiming Zhao Shuang Li Yapan Wu Xueqian Wu Gaixia Zhang Shuhui Sun Dongsheng Li College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion MaterialsChina Three Gorges UniversityYichang 443002China Hubei Three Gorges Laboratory Yichang 443007China Department of Electrical Engineering École de Technologie Supérieure(ÉTS)MontréalQuébec H3C 1K3Canada Institut National de la Recherche Scientifique(INRS) CentreÉnergie Matériaux TélécommunicationsVarennesQuébec J3X 1P7Canada

Exploring a novel strategy for large-scale production of battery-type Ni(OH)_(2)-based composites,with excellent capacitive performance,is still greatly ***,we developed a facile and cost-effective strategy to in situ grow a layer of Ni(OH)_(2)/Ti_(3)C_(2)T_(x)composite on the nickel foam(NF)collector,where Ti_(3)C_(2)T_(x)is not only a conductive component,but also a catalyst that accelerates the oxidation of NF to Ni(OH)_(2).Detailed analysis reveals that the crystallinity,morphology,and electronic structure of the integrated electrode can be tuned via the electrochemical activation,which is beneficial for improving electrical conductivity and redox *** expected,the integrated electrode shows a specific capacity of 1.09 C cm^(-2)at 1 mA cm^(-2)after three custom activation cycles and maintains 92.4%of the initial capacity after 1500 ***,a hybrid supercapacitor composed of Ni(OH)_(2)/Ti_(3)C_(2)T_(x)/NF cathode and activated carbon anode provides an energy density of 0.1 mWh cm^(-2)at a power density of 0.97 mW cm^(-2),and excellent cycling stability with about 110%capacity retention rate after 5000 *** work would afford an economical and convenient method to steer commercial Ni foam into advanced Ni(OH)_(2)-based composite materials as binder-free electrodes for hybrid supercapacitors.

关键词： electrochemical activation hybrid supercapacitors Ni(OH)_(2) Ti_(3)C_(2)T_(x)

Effect of forging temperature on the microstructure,subsequent aging precipitation behavior,and mechanical properties of Mg-Gd-Y-Zr-Ag alloy

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Journal of Materials Science & Technology 2024年第14期181卷 41-57页

作者： Yingjie Huang Yingchun Wan chuming Liu Shunong Jiang Yonghao Gao Zhiyong Chen School of Materials Science and Engineering Central South UniversityChangsha 410083China Light Alloy Research Institute Central South UniversityChangsha 410083China Hunan Meiyu Technology Co.Ltd. Yueyang 414000China

The deformation mechanism,microstructure evolution,and precipitation behavior of a Mg-8.9Gd-1.8Y-0.5Zr-0.2Ag(wt.%)alloy multi-directionally forged at three different temperatures were *** the forging temperature increases,the particle-stimulated nucleation(PSN)effect diminishes as the num-ber of dynamic precipitates decreases,pyramidal slip is activated,grain boundary migration accelerates,and continuous dynamic recrystallization(CDRX)*** microstructures varied greatly,although fine-grained structures were formed at all different forging *** precipitation be-tween dynamic precipitate growth,dislocation-induced precipitation,and homogeneous precipitation was observed after aging *** them,the medium temperature(748 K)forged and aged alloy ex-hibits the best mechanical performance,with an ultimate tensile strength of 436 MPa,and elongation of 16.3%.The calculation indicates that the mixed precipitation structure containing theβprecipitate band provides a 35%higher strengthening contribution than the typical homogeneously distributed *** formation of precipitation-free zones(PFZs)ensures that aging will not cause a dramatic de-crease in ductility,which provides a reference for the industrial preparation of high-performance wrought Mg-Gd series alloys.

关键词： Mg-Gd-Y-Zr-Ag alloy Multidirectional forging Deformation mechanism Aging behavior high strength