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Apparent Kinetics of 1-Decene Polymerization Catalyzed Using the Ionic Liquid[Bmim]_(x)[C_(2)H_(5)NH_(3)]_(1-x)[Al_(2)Cl_(7)]

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China Petroleum Processing & Petrochemical Technology 2023年第4期25卷 16-22页

作者： Chen Yingze He Jinxue Wang Ben Pan Shiguang Zhang Di Bai Zhongxiang An Liangcheng Liu Dan Ma Aijing Li Hu Gui Jianzhou State Key Laboratory of Separation Membranes and Membrane Processes Tianjin Key Laboratory of Green Chemical Technology and Process Engineeringand School of Chemical Engineering and TechnologyTiangong UniversityTianjin 300387China School of material Science and Engineering Tiangong UniversityTianjin 300387China Ningxia Coal Industry Co.Ltd. CHN ENERGYYinchuan 750011China School of Chemistry Tiangong UniversityTianjin 300387China

Poly-α-olefin(PAO)synthetic oil,a regular long-chain alkane produced from the catalytic polymerization ofα-olefin,is a high-quality lubricating base oil with huge market *** this study,PAO synthesis based on the catalytic polymerization of 1-decene using the ionic liquid(IL)[Bmim]_(x)[C_(2)H_(5)NH_(3)]_(1-x)[Al_(2)Cl_(7)]as the catalyst was *** with the conventional catalyst[Bmim][Al_(2)Cl_(7)],the obtained PAO product incorporates more trimers and tetramers of 1-decene and contains few double-bond end groups,demonstrating a better catalytic system for PAO-10 *** apparent polymerization kinetics of 1-decene in this catalytic system were studied based on the 1-decene concentration,catalyst concentration,and reaction *** apparent kinetic equation for PAO formation was determined,providing a promising strategy for PAO production using 1-decene polymerization.

关键词： poly-α-olefin 1-decene ionic liquid apparent kinetics catalytic polymerization

Syntheses,structures,luminescent and magnetic properties of two coordination polymers based on a flexible multidentate carboxylate ligand

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Chinese Chemical Letters 2015年第5期26卷 499-503页

作者： Dan Tian Xiao-Jing Liu Rong-Ying Chen Ying-Hui Zhang Department of Chemistry and TKL of Metal-and Molecule-Based material Chemistry Key Laboratory of Advanced Energy Materials Chemistry(MOE)and Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)Nankai University

Two coordination polymers, {[Cu3（tci）2（DMAc）3].6DMAc-2H2O}n （1[） and {[Cu3（tci）2（tpt）2（H2O）2]- 2DMAc-2H2O}n （2）（H3tci = tris（2-carboxyethyl）isocyanurate, tpt = 2,4,6-tris（4-pyridyl）-l,3,5-triazine, DMAc = N,N-dimethylacetamide）, have been constructed under solvothermal conditions. Both polymers were structurally characterized by single crystal X-ray diffraction, elemental analyses, IR spectra, thermogravimetric （TG） analyses and powder X-ray diffraction （RXPD）. 1 shows a （3,4）-connected 2D layer structure comprising Cu2（CO2）4 paddle-wheel units, which are further bridged by C-H.--O interactions to give a 3D supramolecular network. The introduction oftpt produces different framework for 2 that comprises a dinuclear and a mononuclear Cu（II） building units, which are further bridged together by tci3- and tpt ligands to give a 4-connected 2D topological net. Adjacent 2D layers are packed together via C-H...O interactions and π...π stacking interactions to form a 3D supramolecular structure. In addition, the luminescent properties and the solid-state UV-vis spectra of I and 2 were explored. Furthermore, antiferromagnetic exchange interactions were unveiled in the Cu2（COO）4 units of 1. ~ 2015 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.

关键词： Coordination polymers X-ray crystallography Copper Magnetic properties Luminescence

A water-stable metal-organic framework： serving as a chemical sensor of PO43– and a catalyst for CO2 conversion

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Science China Chemistry 2017年第10期60卷 1328-1333页

作者： Bin Zhai Hang Xu Zhong-Yi Li Chun-Shuai Cao Bin Zhao College of Chemistry and Chemical Engineering Shangqiu Normal University Shangqiu 476000 China Key Laboratory of Advanced energy material Chemistry Department of Chemistry Nankai University Tianjin 300071 China Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300071 China

A new 2D Eu-BTB framework(1) with stratified gridding structure of about 14.6×16.9was synthesized and *** 1 displays excellent water stability with the pH 2–12. The luminescent investigations suggest that 1 could represent a chemical sensor of PO43. with high sensitivity and selectivity. Importantly, 1 as a sensor of PO_4^(3-) can be reused at least five *** the other hand, the catalytic investigations of 1 were carried out, indicating that 1 could be demonstrated as a recyclable catalyst for CO_2 conversion with epoxides.

关键词：转化催化剂化学传感器水稳定性机框金属可重复使用网格结构 BTB

Support induced phase engineering toward superior electrocatalyst

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Nano Research 2022年第3期15卷 1831-1837页

作者： Beibei Sheng Dengfeng Cao Hongwei Shou Oyawale Adetunji Moses Wenjie Xu Yujian Xia Yuzhu Zhou Huijuan Wang Ping Wan Shuang Zhu Wangsheng Chu Xiaojun Wu Shuangming Chen Li Song National Synchrotron Radiation Laboratory CAS Center for Excellence in NanoscienceUniversity of Science and Technology of ChinaHefei 230026China Hefei National Laboratory for Physical Sciences at the Microscales Department of Materials Sciences and EngineeringUniversity of Science and Technology of ChinaHefei 230026China Experimental Center of Engineering and material Science University of Science and Technology of ChinaHefei 230026China materials Interfaces Center Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 440305China Institute of energy Hefei Comprehensive Nation Science CenterHefei 230031China

The phase transformation of catalysts has been extensively observed in heterogeneous catalytic reactions that hinder the long cycling catalysis,and it remains a big challenge to precisely control the active phase during the complex conditions in electrochemical ***,we theoretically predict that carbon-based support could achieve the phase engineering regulation of catalysts by suppressing specific phase *** single-walled carbon nanotube(SWCNT)as typical support,combined with calculated E-pH(Pourbaix)diagram and advanced synchrotron-based characterizations technologies prove there are two different active phases source from cobalt selenide which demonstrate that the feasibility of using support effect regulating the potential advantageous ***,it is worth noting that the phase engineering derived Co_(3)O_(4)-SWCNT exhibits a low overpotential of 201 mV for delivering the current density of 10 mA/cm^(2)in electrocatalytic oxygen evolution reaction(OER).Also,it reaches a record current density of 529 mA/cm^(2)at 1.63 V(***)in the electrocatalytic urea oxidation reaction(UOR),overwhelming most previously reported catalysts.

关键词： phase engineering support synchrotron radiation characterization oxygen evolution reaction(OER) urea oxidation reaction(UOR)

Effect of Applied Pressure on the Joining of Combustion Synthesized Ni_3Al Intermetallics with Al Alloy

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Journal of materials Science & Technology 2008年第1期24卷 123-126页

作者： G.S.Cho J.H.Yang K.H.Choe K.W.Lee A.Ikenaga Advanced material Processing team Korea Institute of Industrial Technology 7-47 Songdo-Dong Yeonsu-Ku Incheon 406-840 Korea Department of Metallurgy and materials Science Graduate School of Engineering Osaka Prefecture University 1-1 Gakuen-Cho Sakai Osaka 599-8531 Japan

We focused on the surface reinforcement of ligth weight casting alloys with Ni-AI intermetallic compounds by in-situ combustion reaction to improve the surface properties of non-ferrous casting *** our previous works,green compact of elemental Ni and Al powders were reacted to form Ni-3Al intermetallic compound by SHS （Self-propagating high temperature synthesis） reaction with the heat of molten Al alloy and simultaneously bonded with Al casting *** some defects such as tiny cracks and porosities were remained in the reacted *** we applied pressure to prevent thermal cracks and fill up the pores with liquid Al alloy by squeeze casting *** compressed Al alloy bonded with the Ni-3Al intermetallic compound was sectioned and observed by optical microscopy and scanning electron microscopy （SEM）.The stoichiometric compositions of the intermetallics formed around the bonded interface and in the reacted compact were identified by energy dispersive spectroscopy （EDS） and electron probe micro analysis （EPMA）. Si rich layer was formed on the Al alloy side near the bonded interface by the sequential solidification of Al *** porosities observed in the reacted Ni-3Al compact were filled up with the liquid AI *** Si particles from the molten Al alloy were detected in the pores of reacted Ni-3Al intermetallic *** Al casting alloy and Ni-3Al intermetallic compound were joined very soundly by applying pressure to the liquid Al alloy.

关键词： Joining Combustion synthesis Ni3AI Intermetallic compound Squeeze casting

Heat-treated glassy carbon under pressure exhibiting superior hardness,strength and elasticity

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Journal of Materiomics 2021年第1期7卷 177-184页

作者： Meng Hu Shuangshuang Zhang Bing Liu Yingju Wu Kun Luo Zihe Li Mengdong Ma Dongli Yu Lingyu Liu Yufei Gao Zhisheng Zhao Yoshio Kono Ligang Bai Guoyin Shen Wentao Hu Yang Zhang Ralf Riedel Bo Xu Julong He Yongjun Tian Center for High Pressure Science(CHiPS) State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao066004China Fachbereich material-und Geowissenschaften Technische Universitat DarmstadtOtto-Berndt-Str.3Darmstadt64287Germany Key Laboratory for Microstructural material Physics of Hebei Province School of ScienceYanshan UniversityQinhuangdao066004China High Pressure Collaborative Access team(HPCAT) Advanced Photon SourceArgonne National LaboratoryIL60639USA Institute of High energy Physics Chinese Academy of ScienceBeijing100049China

Glassy carbon(GC)is a type of non-graphitizing disordered carbon material at ambient pressure and high temperatures,which has been widely used due to its excellent mechanical *** we report the changes in the microstructure and mechanical properties of GC treated at high pressures(up to 5 GPa)and high *** formation of intermediate sp2-sp3 phases is identified at moderate treatment temperatures before the complete graphitization of GC,by analyzing synchrotron X-ray diffraction,Raman spectra,and transmission electron microscopy *** intermediate metastable carbon materials exhibit superior mechanical properties with hardness reaching up to 10 GPa and compressive strength reaching as high as 2.5 GPa,nearly doubling those of raw GC,and improving elasticity and thermal *** synthesis pressure used in this study can be achieved in the industry on a commercial scale,enabling the scalable synthesis of this type of strong,hard,and elastic carbon materials.

关键词： Glassy carbon Industrially achievable pressure sp2-sp3 intermediate carbon Hardness Strength Elasticity

Effects of Alloying Elements on the Microstructures and Mechanical Properties of Heavy Section Ductile Cast Iron

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Journal of materials Science & Technology 2007年第1期23卷 97-101页

作者： G.S.Cho K.H.Choe K.W.Lee A.Ikenaga Advanced material Processing team Korea Institute of Industrial Technology994-32Dongchun-DongYeonsu-KuIncheon 406-130South Korea Department of Metallurgy and materials Science Graduate School of EngineeringOsaka Prefecture University1-1Gakuen-ChoSakaiOsaka 599-8531Japan

The effects of alloying elements on the as-cast microstructures and mechanical properties of heavy section ductile cast iron were investigated to develop press die material having high strength and high ductility. measurements of ultimate tensile strength, 0.2% proof strength, elongation and unnotched Charpy impact energy are presented as a function of alloy amounts within 0.25 to 0.75 wt pct range. Hardness is measured on the broken tensile specimens. The small additions of Mo, Cu, Ni and Cr changed the as-cast mechanical properties owing to the different as-cast matrix microstructures. The ferrite matrix of Mo and Ni alloyed cast iron exhibits low strength and hardness as well as high elongation and impact energy. The increase in Mo and Ni contents developed some fractions of pearlite structures near the austenite eutectic cell boundaries, which caused the elongation and impact energy to drop in a small range. Adding Cu and Cr elements rapidly changed the ferrite matrix into pearlite matrix, so strength and hardness were significantly increased. As more Mo and Cr were added, the size and fraction of primary carbides in the eutectic cell boundaries increased through the segregation of these elements into the intercellular boundaries.

关键词： Heavy section ductile cast iron Alloying elements As-cast microstructures As-cast mechanical properties

Temperature-Dependent Photoluminescence of Silicon Nanoporous Pillar Array

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Chinese Physics Letters 2014年第4期31卷 170-173页

作者： LI Yong WANG Xiao-Bo FAN Zhi-Qiang LI Xin-Jian Department of Physics and Laboratory of material Physics Zhengzhou University Zhengzhou 450052 Department of Pt2ysies and Solar energy Research Center Pingdingshan University Pingdingshau 467000 Department of Physics Anyang Normal University Anyang 455000

Silicon nanoporous pillar array （Si-NPA） is a micron-nanometer hierarchical structure which might be used as functional substrates for constructing optoelectronic nanodevices. This makes understanding the photolumines- cence （PL） from Si-NPA important. We measure the PL of Si-NPA in the range of 11-300K. By analyzing the evolution of the peak energy and intensity with temperature, the ultraviolet, blue, orange and red PL bands from Si-NPA are attributed to the radiative recombination through the deep-levels in silicon oxide, oxygen-related defect states in silicon nanocrystallites （nc-Si）, band-to-band transition within nc-Si, and surface/interface states of nc-Si or between nc-Si and SiOx, respectively. At least two non-radiative recombination processes, which are activated at different temperature ranges, are proposed for the PL intensity variation with temperature. These results might provide strong foundations for designing and constructing optoelectronic devices based on silicon nanostruetures.

关键词： Array Temperature-Dependent photoluminescence(PL)from

Synthesis, structure and photocatalysis properties of two 3D Isostructural Ln (Ⅲ)-MOFs based 2,6-Pyridinedicarboxylic acid

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Journal of materials Science & Technology 2018年第9期34卷 1526-1531页

作者： Chenchen Zhang Siyue Wei Lixian Sun Fen Xu Pengru Huang Hongliang Peng School of material Science and Engineering Guilin University of Electronic Technology Guilin 541004 China Guangxi Key Laboratory of Information materials Guilin 541004 China Guangxi Collaborative Innovation Center of Structure and Property for New energy and materials Guilin 541004 China

Two new 3 D metal-organic frameworks（MOFs） named [Pr2（PDA）3-3 H2 O]-H2 O（1） and[Nd2（PDA）3-3 H2 O] H2 O（2） [2,6-Pyridinedicarboxylic acid（H2 PDA）] were synthesized by solvothermal method. They were characterized by elemental analyses（EA）, infrared spectroscopy（FT-IR）, thermogravimetric analysis（TG）, photocatalysis performance and single crystal X-ray diffraction studies（XRD）.The XRD analysis indicated that MOFs（1） and（2） both belong to the monoclinic system with space group P2（1）/C. The structural model were drawn by the diamond software, and the structure revel that MOFs（1） and（2） adopt three-dimensional（3 D） frameworks constructed by cross-linking of one-dimensional（1 D） infinite chain secondary building unit（SBU） by 2,6-Pyridinedicarboxylic acid and hydrogen bond as linker. These frameworks feature channels inside which coordinated H20 solvent molecules are located. Thermogravimetric analysis showed that both MOFs are thermally stable, the photocatalytic evaluation showed the materials have a good prospect in degration methylene blue. As for complex1, the decomposition efficiency of Methylene blue was about 91.08% after 130 min and the complex 2 reach 90.45% after 160 min under the sun light.

关键词： Metal-organic frameworks Solvothermal method Photocatalysis performance