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The synthesis and study of the fluorescent probe for sensing Cu^(2+) based on a novel coumarin Schiff-base

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Chinese Chemical Letters 2014年第7期25卷 1082-1086页

作者： Yu-Wei duan Hao-Yang Tang Yuan Guo Zhan-Ke song Meng-Jiao Peng yong Yan Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry and Materials ScienceNorthwest University School of Automation Xi’an University of Posts and Telecommunications

A novel, fluorescent probe was synthesized from 2,4-dihydroxybenzaldehyde and 8-hydroxyquinoline for sensing Cu2＋ by the naked eye. The structure was confirmed by 1R, MS, 1H NMR, 13C NMR and the spectral properties of the probe were investigated. It exhibited strong fluorescence responses toward Cu2＋ and high selectivity over other metal ions. The binding constant between the probe and Cu2＋ was calculated using Benesi-Hildebrand equation.

关键词： Fluorescent probe Schiff-base Copperion Coumarin

New hybrid encapsulation for flexible organic light-emitting devices on plastic substrates

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Chinese Science Bulletin 2008年第6期53卷 958-960页

作者： LIU song ZHANG DeQiang LI Yang duan Lian DONG GuiFang WANG LiDuo QIU yong Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education Tsinghua University Beijing 100084China

The hybrid encapsulation for flexible organic light-emitting devices on plastic substrate was investi- gated. The hybrid encapsulation consisted of four periods of Alq3/LiF layers as the pre-encapsulation layer and a flexible aluminum foil coated with getter as the encapsulation cap. We measured the device lifetime at a continuous constant current of 20 mA/cm2, which corresponded to an initial luminance of 2000 cd/m2. The half-luminance decay time of the encapsulated device was about 458 h. More over, the hybrid encapsulation is ultrathin and flexible, ensuring device bendability.

关键词：有机发光设备可变形显示器混合包装使用寿命

Formation Control for Water-Jet USV Based on Bio-Inspired Method

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China Ocean Engineering 2018年第1期32卷 117-122页

作者： FU Ming-yu WANG duan-song WANG Cheng-long College of Automation Harbin Engineering University

The formation control problem for underactuated unmanned surface vehicles(USVs) is addressed by a distributed strategy based on virtual leader strategy. The control system takes account of disturbance induced by external environment. With the coordinate transformation, the advantage of the proposed scheme is that the control point can be any point of the ship instead of the center of gravity. By introducing bio-inspired model, the formation control problem is addressed with backstepping method. This avoids complicated computation, simplifies the control law,and smoothes the input signals. The system uniform ultimate boundness is proven by Lyapunov stability theory with Young inequality. Simulation results are presented to verify the effectiveness and robust of the proposed controller.

关键词： water-jet USV bio-inspired model backstepping formation control

Integrated electrocatalysts derived from metal organic frameworks for gas-involved reactions

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Nano Materials Science 2023年第2期5卷 161-176页

作者： Yuke song Wenfu Xie Mingfei Shao Xue duan State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing100029China

Integrated electrocatalysts(IECs)containing well-defined functional materials directly grown on the current collector have sparked increasing interest in the fields of electrocatalysis owing to efficient activity,high stability and the fact that they are easily assembled into ***,metal organic frameworks(MOFs)provide a promising platform for constructing advanced IECs because of their properties of low cost,large surface area and efficient structural *** this review,the design principles of state-of-the-art IECs based on MOFs are presented,including by hydrothermal/solvothermal,template-directed,electrospinning,electrodeposition and other *** high performance of MOF-derived IECs has also been demonstrated in electrocatalytic gasinvolved *** is promising for green energy storage and *** structure-activity relationship and performance improvement mechanism of IECs are uncovered by discussing some in situ technologies for ***,we provide an outlook on the challenges and prospects in this booming field.

关键词： Integrated electrocatalyst Metal organic framework Structure-activity relationship Gas-involved reaction

Versatile Inorganic Oligomer-based Photochromic Spiropyrane Gels

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Chinese Journal of Structural Chemistry 2022年第5期41卷 37-47页

作者： Jiajia song Wei duan Yun Chen Xiangyang Liu State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China College of Ocean and Earth Sciences College of MaterialsCollege of Physical Science and TechnologyState Key Laboratory of Marine Environmental Science(MEL)Research Institute for Biomimetics and Soft MatterXiamen UniversityXiamen 361005China Department of Physics National University of Singapore2 Science Drive 3Singapore 117542Singapore

Here we report an example of a general strategy for the immobilization of various different photochromic spiropyran molecules on eco-friendly cheap *** spiropyrans are encapsulated in calcium salt oligomers-based gels by centrifugation,forming an inorganic oligomer-based gelatinous photoswitchable hybrid ***^(2+)is also used to regulate the optical properties of spiropyrans through *** oligomer-based gel can not only provide the space required for photoisomerization,but also reduce the interference of the surrounding environment on the photochromic ***,a practical paper-based and colloidal flexible substrate platform is constructed for the removal and naked-eye detection of liquid and gaseous hydrazine at room temperature based on the reactivity of the formyl group on spiro-pyrans loaded in Ca3(PO4)2 *** general strategy can be used for other inorganic oligomer-based molecular switches and sensing systems.

关键词： inorganic oligomer photochromic gels naked-eye detection of hydrazine

Static magnetic field-assisted synthesis of Fe3O4 nanoparticles and their adsorption of Mn(Ⅱ) in aqueous solution

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Chinese Journal of Chemical Engineering 2017年第1期25卷 32-36页

作者： yong Liu Jianfei Bai Hongtao duan Xiaohong Yin College of Chemistry and Chemical Engineering Tianjin University of Technology Tianjin 300384 China Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion Tianjin University of Technology Tianjin 300384 China

A facile method for synthesis of the magnetic Fe_3O_4 nanoparticles was *** nanoparticles were prepared via co-precipitation method with(PMF) and without(AMF) 0.15 T static magnetic *** effects of magnetic field on the properties of magnetic nanoparticles were studied by XRD,TEM,SEM,VSM and *** results showed that the magnetic field in the co-precipitation reaction process did not result in the phase change of the Fe_3O_4 nanoparticles but improved the *** morphology of Fe_3O_4 nanoparticles was varied from random spherical particles to rod-like cluster *** VSM results indicated that the saturation magnetization value of the Fe_3O_4 nanoparticles was significantly improved by the magnetic *** BET of Fe_3O_4nanoparticles prepared with the magnetic field was larger than the control by 23.5%.The batch adsorption experiments of Mn(Ⅱ) on the PMF and AMF Fe_3O_4 nanoparticles showed that the Mn(II) equilibrium capacity was increased with the pH value *** pH 8,the Mn(Ⅱ) adsorption capacity for the PMF and AMF Fe_3O_4 was reached at 36.81 and 28.36 mg·g^(-1),*** pseudo-second-order model fitted better the kinetic models and the Freundlich model fitted isotherm model well for both PMF and AMF Fe_3O_*** results suggested that magnetic nanoparticles prepared by the magnetic field presented a fairly good potential as an adsorbent for an efficient removal of Mn(Ⅱ) from aqueous solution.

关键词： Magnetic field Fe3O4 nanoparticles Mn(Ⅱ) Adsorption

EAF steelmaking process with increasing hot metal charging ratio and improving slagging regime

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International Journal of Minerals,Metallurgy and Materials 2009年第4期16卷 375-382页

作者： Jian-ping duan yong-liang Zhang Xue-min Yang Technical Center of Shanxi Taigang Stainless Corporation Limited Taiyuan Shanxi 030003 China Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China

A new electric arc furnace （EAF） steelmaking process with increasing hot metal charging ratio and improving slagging regime simultaneously was developed and applied in a 50 t electric arc furnace for more than a year at No. 1 Steelmaking Plant of Shanxi Taigang Stainless Corporation Limited. The essential fact of the new EAF steelmaking process was to charge hot metal in two portions or steps： firstly, 35wt%-40wt% hot metal was pretreated by blowing oxygen in a specially designed reactor for decar burization and improving hot metal temperature and melting premelted slag; secondly, 30wt% hot metal was charged into EAF with high basicity refining slags from ladle furnace （LF）-vacuum degassing furnace （VD） refining process. The results show that the hot metal charging ratio can reach to about 65wt%-70wt% for the new EAF steelrnaking process; meanwhile, the tap-to-tap time of a 50 t EAF can shorten by 5-10 min, the electricity consumption can decrease by 35-50 kW·h/t, the lime consumption can reduce by 10.5 kg/t of molten steel, and the content of harmful heavy metals in molten steel can be easily controlled to less than the upper limits of aimed steel specification or grade compared with the traditional EAF steelmaking process. In addition, the dephosphorization ability shows a slight strengthening, however, a small degree of lessening for desulphurization ability is observed for the new EAF steelmaking process, but the weakness of desulphurization ability cannot become an obstacle to its further application since a stronger desulphurization ability can be achieved during secondary refining of LF coupled with VD after EAF steelmaking process.

关键词： electric arc furnace (EAF) charge ratio slagging refining slags lime

Multi-robot hunting strategy based on FIS and artificial immune algorithm

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High Technology Letters 2019年第1期25卷 57-64页

作者： duan yong Huang Xiao Shenyang University of Technology

data is gathered to describe the relative location and relative motion state of the robots, which in turn forms the beginning stage of the fuzzy rule. The artificial immune algorithm optimizes and generates the rule data base and adaptive design considers factors in measuring the hunting efficiency. The optimized rules are applied to the hunting task and the results show that the algorithm can effectively actualize hunting of multiple mobile robots.

关键词： multi-robot hunting fuzzy inference system(FIS) artificial immunity fuzzy rule database

Phase Transformation and Carbide Precipitation of Functional Gradient Semi-solid 9Cr18 Steel

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Acta Metallurgica Sinica(English Letters) 2018年第8期31卷 823-830页

作者： yong-Jin Wang Ren-Bo song Ren-Feng song School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Institute of Industrial Science The University of TokyoKomaba 4-6-1MeguroTokyo 153-8505Japan Ansteel Mining Engineering Corporation Anshan 114004China

The unique phase transformation and carbide evolution in 9Cr18 steel were investigated during semi-solid forming and subsequent heat treatment. The functional gradient thixoforging 9Cr18 component was divided into inner area and edge area. Microstructure evolution was different at each area. After semi-solid cooling, the solid particles in the inner area were retained as meta-austenite. During annealing, M_（23）C_6 carbide began to precipitate when temperature reached 700 °*** transformation occurred when temperature reached 800 °C. The occurrence of M_（23）C_6 carbide and martensite structure would be harmful to the mechanical properties of inner area. In the edge area, the liquid underwent eutectic transformation to form bar-shape M_7C_3 carbide and secondary austenite after semi-solid cooling. The width of bar-shape carbide would decrease during annealing. By controlling the carbide evolution, we could tailor the functional gradient material with required property.

关键词： Semi-solid forming Solid/liquid phase Annealing Carbide precipitation