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Impregnated Sulfur in Carbonized nitrogen-containing Porous Organic Frameworks as Cathode with High Rate Performance and Long Cycle Life for Lithium-sulfur Batteries

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Chemical Research in Chinese Universities 2019年第4期35卷 654-661页

作者： DONG Yan BEN Teng Department of Chemistry Jilin University Changchun 130012P. R.China Department of Bioengineering Zunyi Medical University(Zhuhai Campus)Zhuhai 519041P.R.China

The undesirable cycling performance caused by soluble poly sulfides shuttling between anode and cathode has been considered as the main challenge that has hindered its practical applications for lithium-sulfiir(Li-S) batteries. To solve tliis issue effectively, a nitrogen-containing porous carbon, namely JUC-Z2-900,developed from a porous organic framework, namely JUC-Z2, bearing a high surface area(805 m^2/g),small pore size(0.5 mil) and nitrogen doping(2.15%, mass fraction), has been used as a host material for Li-S batteries. The micropores of JUC-Z2-900 can confine the smaller sulfur molecules S2-4, which can essentially alleviate the critical problem of poly sulfide ***, nitrogen-containing JUC-Z2-900 can promote chemical adsorption of sulfur. The above two factors can improve the electrochemical performance of Li-S batteries effectively. To compare the eftects of sulfur contents and melt-difiusion strategy in JUC-Z2-900/S composites, a series of JUC-Z2-900/S composites was synthesized and tlieir electrochemical perfbnnances were explored, indicating good rate performance and excellent cycling stability of the composites contributed by both appropriate mass percentage of sulfiir and its confinement in the micropores.

关键词： Li-S battery nitrogen-containing porous carbon Porous organic framework

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Characterization of nitrogen-containing aromatics in Baiyinhua lignite and its soluble portions from thermal dissolution

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Chinese Journal of Chemical Engineering 2019年第11期27卷 2783-2787页

作者： Yangyang Zhang Xianyong Wei Jinghui Lü Hao Jiang Fangjing Liu Guanghui Liu Zhimin Zong Key Laboratory of Coal Processing and Efficient Utilization Ministry of EducationChina University of Mining&TechnologyXuzhou 221116China State Key Laboratory of High-efficiency Utilization and Green Chemical Engineering Ningxia UniversityYinchuan 750021China Department of Chemical Engineering College of Chemical EngineeringHenan Polytechnic UniversityJiaozuo 454003China

Soluble portions(SPs) 1-4(SP1-SP4) were afforded from sequentially dissolution and alkanolyses of Baiyinhua lignite(BL) in cyclohexane,CH3OH,CH3CH2OH,and(CH3)2CHOH at 300℃.They were analyzed with a gas chromatograph/mass spectrometer and quadrupole exactive orbitrap mass spectrometer(QEOTMS) with an atmosphere pressure chemical ionization source in positive-ion mode,while BL was characterized with an X-ray photoelectron spectrometer(XRPES).The results show that the yields of SP2 and SP3 are much higher than those of SP1 and SP4,and the total SP yield is ca.39.0%.According to the analysis with XRPES,pyrrolic nitrogen atoms are the most abundant nitrogen existing forms in *** of nitrogen-containing aromatics(NCAs) were resolved with QEOTMS and their molecular masses are mainly in the range of 200-450 *** main NCAs are N1O1 and N1O2 class species with double bond equivalent values of 4-18 and carbon numbers of *** nitrogen atoms appear in pyridine s,quinolines,benzoquinolines or acridine,and dibenzoquinolines or naphthoquinolines,while the oxygen atoms exist in methoxy and furan rings.

关键词： Lignite Sequential thermal dissolution and alkanolyses nitrogen-containing aromatics

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Synthesis of Novel 3-Substituted PyridothienopyrimidineDerivatives with Biological Evaluation as Antimicrobial Agents

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Chemical Research in Chinese Universities 2016年第6期32卷 967-972页

作者： Farag A. E1-Essawy Nader M. Boshta Ayman K. EI-Sawaf Areal A. Nassar Mohamed S. Khalafalah Preparatory Year Deanship Basic Science Department Prince Sattam Bin Abdulaziz University KSA Chemistry Department Faculty of Science Menoufia University Shebin EI-Koam Egypt Collage of Science and Humanitles Prince Sattam Bin Abdulaziz University KSA Faculty of Education for Girls Prince Sattam Bin Abdulaziz University KSA

Novel 3-substituted pyridothienopyrimidine derivatives have been synthesized via the reaction of 2-{7,9-dimethyl-4-oxopyrido[3′,2′：4,5]thieno[3,2-d]pyrimidin-3（4H）-yl}acetohydrazide（5） with a variety of activereagents and chemicals. Structures of the newly synthesized compounds were established based on spectral *** resulting pyridothienopyrimidine derivatives were evaluated for their possible antimicrobial activity and some ofthem represent a new class of potentially antimicrobial compounds, especially compounds 9 and 18 which displayedthe highest activity against Gram-positive bacteria, Gram-negative bacteria, and Fungi in MIC range of 0.12--1.95 μg/mL.

关键词： nitrogen-containing heterocycle Pyridothienopyrimidine Thieno[2,3-b]pyridine Antimicrobial

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含氮多孔复合碳材料的制备及其在超级电容器的应用研究

含氮多孔复合碳材料的制备及其在超级电容器的应用研究

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2015年第十四届全国应用化学年会

作者：曾蓉徐亚洲阙明明吴辉勇魏俊超南昌大学化学学院

＜正＞电极材料作为超级电容器的重要组成部分之一,很大程度上决定了超级电容器的性能。多孔碳材料具有大比表面积,高电导率,适当孔径分布和规则孔道结构,化学性质稳定,能够成为理想的电极材料。本文以明胶为主要碳源和氮源,掺杂氧化石... 详细信息

＜正＞电极材料作为超级电容器的重要组成部分之一,很大程度上决定了超级电容器的性能。多孔碳材料具有大比表面积,高电导率,适当孔径分布和规则孔道结构,化学性质稳定,能够成为理想的电极材料。本文以明胶为主要碳源和氮源,掺杂氧化石墨烯,用纳米碳酸钙为模板,经高温碳化,再用氢氧化钾活化法增加材料的多孔率,制备了一种氮掺杂的多孔复合碳电极材

关键词： carbon nitrogen-containing nanoporous supercapacitor

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