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Construction of metal-organic frameworks with unsaturated Cu sites for efficient and fast reduction of nitroaromatics:A combined experimental and theoretical study

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Chinese Chemical Letters 2024年第8期35卷 514-519页

作者： Longlong Geng Huiling Liu Wenfeng Zhou Yong-Zheng zhang Hongliang Huang Da-Shuai zhang Hui Hu Chao Lv xiuling zhang Suijun Liu Shandong Provincial Key Laboratory of Monocrystalline Silicon Semiconductor Materials and Technology College of Chemistry and Chemical EngineeringDezhou UniversityDezhou 253023China School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 255000China State Key Laboratory of Separation Membranes and Membrane Processes School of Chemical Engineering and TechnologyTiangong UniversityTianjin 300387China School of Chemistry and Chemical Engineering Jiangxi Provincial Key Laboratory of Functional Molecular Materials ChemistryJiangxi University of Science and TechnologyGanzhou 341000China

Metal-organic frameworks(MOFs)functionalized with open metal sites(OMSs)have received widespread attention in various applications due to their fascinating electronic properties and unique interactions with guest ***,rational tailoring of the coordination environment of metal nodes dur-ing the synthesis of MOFs remains a great challenge due to their tendency of saturated coordination with ***,we reported the construction of three new MOFs featuring unsaturated Cu(Ⅱ)sites,namely[Cu(HCOO)(pzta)]_(n)(HL-1),{[Cu(PTA)0.5(pzta)(H_(2)O)]·2H_(2)O}_(n)(HL-2)and[Cu(NA)0.5(pzta)]_(n)(HL-3)(Hpzta=3-pyrazinyl-1,2,4-triazole;PTA=terephthalic acid;NA=1,4-naphthalene dicarboxylic acid),based on the mixed-linker strategy via specific selection of versatile Hpzta ligand and carboxylate ***-markably,the obtained MOFs exhibited excellent activity and good recyclability for the catalytic reduction of nitroaromatics under mild conditions(25℃and 1 atm).In particular,the complete conversion of 4-nitrophenol(4-NP)took only 30 s on HL-2,reaching a record-high TOF value compared with previously reported metal *** combined experimental and theoretical studies on HL-2 revealed that the open Cu site with positive-charged nature could improve the adsorption and subsequent electron trans-port between the substrates,and was responsible for the outstanding *** work shined lights on the further enhancement of performance for MOFs through rational OMSs construction.

关键词： Metal-organic frameworks Open metal sites Catalysis Copper node 4-Nitrophenol

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Development of CNPC's Overseas New Energy Business under the Trend of Energy Transition

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China Oil & Gas 2024年第04期 20-25页

作者： Ding Peng zhang xiuling Ma Huawei PetroChina Planning and Engineering Institute

Under the carbon neutrality goal, energy transition has become a global consensus. As traditional oil and gas operations face increasing pressure, international oil companies are intensifying their efforts towards low...

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无压烧结SiC-金刚石多晶材料致密化及物理性能研究

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粉末冶金技术 2024年第2期42卷 165-169,176页

作者：张秀玲陈宇红戚武彬张强海万秀北方民族大学材料科学与工程学院银川750021 北方民族大学省部共建"粉体材料及特种陶瓷"重点实验室银川750021

以AlN-Y_(2)O_(3)-Sc2O3为液相烧结助剂,添加不同质量分数金刚石,经无压烧结制备SiC-金刚石多晶材料。采用扫描电镜观察多晶材料显微结构,利用激光闪射法测量其热扩散系数和热导率。研究了金刚石质量分数(1.0%、2.5%、5.0%)和粒度(0.25... 详细信息

以AlN-Y_(2)O_(3)-Sc2O3为液相烧结助剂,添加不同质量分数金刚石,经无压烧结制备SiC-金刚石多晶材料。采用扫描电镜观察多晶材料显微结构,利用激光闪射法测量其热扩散系数和热导率。研究了金刚石质量分数(1.0%、2.5%、5.0%)和粒度(0.25μm、1.00μm)对SiC陶瓷材料致密化行为和力学性能的影响。结果表明,金刚石质量分数低于5.0%,烧结后的材料相对密度均超过94%;金刚石含量为5.0%的样品相对密度远远低于其他样品。SiC多晶材料的相对密度随金刚石添加量的增加而降低,原料中添加过量的金刚石会降低材料的相对密度。在实验条件下,多晶材料晶粒尺寸没有发生异常长大,硬度为16~18 GPa,断裂韧性为3.8~4.4 MPa·m^(1/2),抗弯强度为239~540 MPa。材料的热导率和热扩散系数随着温度的升高而降低,气孔是影响复合材料热导率的主要因素。

关键词：碳化硅多晶材料无压烧结致密化液相力学性能热性能

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Methane conversion under cold plasma over Pd-containing ionic liquids immobilized on γ-Al_2O_3

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Journal of Energy Chemistry 2013年第3期22卷 446-450页

作者： xiuling zhang Lanbo Di Qian Zhou College of Physical Science and Technology Dalian University

Pd-containing ionic liquid （IL） 1-hexyl-3-methylimidazolium tetrafluoroborate （C6MIMBF4） immobilized on γ-Al2O3 （Pd-IL/γ-Al2O3） was prepared and characterized by Fourier transform infrared spectroscopy （FTIR）, scanning electron microscopy （SEM） and Brunauer-Emmett- Teller （BET） analysis. The influences of C6MIMBF4 loading and Pd on methane conversion to C2 hydrocarbons under cold plasma were investigated. FTIR and SEM analyses indicated that C6MIMBF4 had been successfully immobilized on γ-Al2O3 and the C6MIMBF4 showed excellent stability under cold plasma. The results of BET and methane conversion showed that with the increase in immobilization amount of C6MIMBF4 onto γ-Al2O3, the specific surface area and pore volume of IL/γ-Al2O3 decreased, while the selectivity and yield of C2 hydrocarbons increased. The selectivity of C2 hydrocarbons was 94.6% when the loading of C6MIMBF4 was 40%, and the percentage of C2H4 in C2 hydrocarbons was as high as 64% when using Pd-IL/γ-Al2O3 as a catalyst with no conventional thermal reduction treatment. Optical emission spectra （OES） from the cold plasma reactor during methane conversion were also studied. The results indicated that the intensity of the C2, CH, H, and C active species from methane and hydrogen decomposition increased when IL/γ-Al2O3 or Pd-IL/γ-Al2O3 was introduced into the plasma system. Based on the analyses of the gas product and OES spectra, it can be concluded that the surface catalyzed reactions between plasma and ionic liquid were very important for the reduction of Pd2＋ and the formation of C2H4.

关键词： methane plasma immobilized ionic liquid

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扬州市2016—2022年流感暴发疫情流行病学特征分析

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医学动物防制 2024年第6期40卷 591-595页

作者：许纯王寅周乐吴程张秀玲张军董玉颖扬州市疾病预防控制中心江苏扬州225100

目的分析扬州市2016—2022年流感暴发疫情数据,了解流感暴发疫情的流行病学特征。方法从突发公共卫生事件管理信息系统和中国流感监测信息系统搜集扬州市2016—2022年流感和流感样病例(influenza-like illness,ILI)暴发疫情资料,对疫情... 详细信息

目的分析扬州市2016—2022年流感暴发疫情数据,了解流感暴发疫情的流行病学特征。方法从突发公共卫生事件管理信息系统和中国流感监测信息系统搜集扬州市2016—2022年流感和流感样病例(influenza-like illness,ILI)暴发疫情资料,对疫情概况、时间分布、地区分布、发生场所、规模和病原学等数据进行统计分析。结果扬州市2016—2022年共报告流感样病例暴发疫情84起,经实验室检测,80起为流感暴发疫情,主要为乙型B(Victoria)型流感病毒(43.75%)和混合型流感病毒(21.25%)。流感暴发疫情学校罹患率为0.24%~9.56%。疫情主要集中在3月和12月。广陵区报告起数最多,报告24起,占30.00%(24/80);其次是邗江区,报告15起,占18.75%(15/80)。流感暴发疫情发生场所主要在幼儿园、小学和中学,小学最多,占疫情总数的93.75%。流感暴发疫情规模以10~29例为主,占疫情总数的55.00%。扬州市2016—2019年、2022年流感暴发疫情阳性检出率分别为43.92%、36.04%、21.21%、66.31%、66.23%,差异有统计学意义(χ^(2)=207.394,P<0.001)。结论冬、春季为扬州市流感暴发疫情报告的高峰期,小学是暴发疫情的高发场所,应该加强中小学校疫情监测,预防和控制流感疫情暴发。

关键词：流感流感样病例暴发疫情流行病学特征疫情规模病毒型别分析

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元宇宙理念下个性化学习空间构建研究

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职业技术 2024年第9期23卷 25-30页

作者：宋玲玲张冠珠张秀玲滨州职业学院

分析并识别学习者个性化需求，在建模个性化的特征、学习过程、学习绩效评价及推送模型基础上，创建元宇宙理念下个性化学习空间，为实现个性化教育提供理论和实践支持。个性化学习空间的构建充分满足了学习个性化发展的趋势，实现了灵... 详细信息

分析并识别学习者个性化需求，在建模个性化的特征、学习过程、学习绩效评价及推送模型基础上，创建元宇宙理念下个性化学习空间，为实现个性化教育提供理论和实践支持。个性化学习空间的构建充分满足了学习个性化发展的趋势，实现了灵活且体验感强的“学”与“教”的过程，达到了“学”与“用”相统一的学习目的。

关键词：个性化教育个性化学习学习空间虚拟学习空间智能学习空间

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Partially crystallized Pd nanoparticles decorated TiO_2 prepared by atmospheric-pressure cold plasma and its enhanced photocatalytic performance

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Journal of Energy Chemistry 2014年第6期23卷 679-683页

作者： Zhijian Xu Bin Qi Lanbo Di xiuling zhang College of Physical Science and Technology Dalian University Liaoning Key Laboratory of Bio-organic Chemistry Dalian University

TiO2 decorated with partially crystallized Pd nanoparticles （Pd/TiO2-P） was successfully prepared by atmospheric-pressure dielectric barrier discharge cold plasma. The XRD and XPS analyses proved that Pd ions were reduced to partially crystallized metallic Pd nanoparticles in Pd/TiO2-P. The XPS spectra also indicated that an enhanced metal-support interaction was formed due to the existence of partially crystallized Pd nanoparticles with lower coordination number in Pd/TiO2-P. Photocatalytic activity of Pd/TiO2-P was much higher than that of TiO2 samples decorated with well crystallized Pd nanoparticles.

关键词： Pd/TiO2 Pd with poor crystallinity photocatalysis atmospheric-pressure cold plasma dielectric barrier discharge

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基于第十三代国际地磁参考场模型在中国区域特征分析与研究

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地震学报 2024年第1期46卷 120-128页

作者：张秀玲赵旭东中国地震局地球物理研究所北京100081 北京白家疃地球科学国家野外科学观测研究站北京100095

根据最新的第十三代国际地磁参考场模型(IGRF13),计算了2015—2020年中国区域地磁场模型七要素长期变化速率,并在此基础上分析我国区域地磁场长期变化特征。通过分析计算我国28个地磁台的IGRF13模型值与实际地磁场的长期变化速率、差值... 详细信息

根据最新的第十三代国际地磁参考场模型(IGRF13),计算了2015—2020年中国区域地磁场模型七要素长期变化速率,并在此基础上分析我国区域地磁场长期变化特征。通过分析计算我国28个地磁台的IGRF13模型值与实际地磁场的长期变化速率、差值及均方误差,结果显示:IGRF13模型所显示的地磁场长期变化与我国区域地磁场实际观测变化基本一致,但在局部区域也存在差异,IGRF13模型能够体现中国区域地磁场的特征。应用IGRF13模型数据时需要考虑局部区域与台站实际观测数据的误差。

关键词：地磁参考场模型等变线平均年变率长期变化速率均方根误差

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Functional Electrospun Nanocomposites for Efficient Oxygen Reduction Reaction

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Chemical Research in Chinese Universities 2021年第3期37卷 379-393页

作者： zhang xiuling GUO Shiquan QIN Yue LI Congju School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing100083P.R.China Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants Beijing100083P.R.China Energy Conservation and Environmental Protection Engineering Research Center in Universities of Beijing Beijing100083P.R.China

Electrospinning with a simple and controllable process has extremely received considerable concerns by virtue of the fabrication and development of ***,nanofibers are playing an increasing impact on energy conversion and storage devices,especially for fuel cells based on oxygen reduction reaction(ORR),in view of the rich porosity,large surface area,excellent mass transportation and simply tunable composition,as well as good mechanical *** this review,we mainly introduce the primary principle of electrospinning technique,electrochemical reaction mechanism of ORR and synthetic strategies,and summarize the recent advances of unique non-noble-metal nanofibers on the basis of metal-organic framework(MOF)derivatives,single-atom catalysts(SACs)and transition metal *** importantly,we emphasize on the influences of the components,morphology and architecture of advanced electrospun catalysts on their corresponding electrochemical performances towards ***,the remaining puzzles and perspectives for further development of the electrospinning nanofibers involving electrocatalysis are *** is envisioned that this review would offer an important direction in designing novel electrocatalysts based on electrospinning nanofibrous structures and developing their potential.

关键词： Electrospinning Electrocatalyst Nanofibrous structure Oxygen reduction reaction

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Hippocampus’s role in forming “task-related” associations: Flashing to the things you are looking for

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Chinese Science Bulletin 2008年第16期53卷 2496-2505页

作者： zhang xiuling NIKI Kazuhisa LUO Jing Key Laboratory of Mental Health Institute of Psychology Chinese Academy of Sciences Beijing 100101 China Neuroscience Research Institute National Institute of Advanced Industrial Science and Technology Tokyo Japan Brainscience and Education RISTEX JST Tokyo Japan

Eichenbaum and colleagues observed that the same place did or did not activate the "goal-approach" cells in hippocampus depending on whether the place was the way for rats to approach specific goal. Parallel with this, the present neuroimage study revealed that, the same type of items could activate the hippocampus more when it was related to the task at hand than when it not. Participants were scanned by fMRI while they made judgments on the type of relationships contained in the word-pairs (e.g., Does the word pair, "furniture-table", contain a "category-exemplar" relationship?). Event-related analysis revealed that the forming of "task-related" association activated hippocampus more than that of "task-unrelated", even if it was the same type of items, and, this hippocampal difference was not caused by the different judgment requirements, nor by the effects of "yes" response. Consistently, the post-judgment cued-recall test exhibited a better retrieval performance for "task-related" associations than for the same type but "task-unrelated" associations. Results also showed that, the semantic re- latedness between the to-be-associated individual words (e.g., the related word pair "healthy-hospital" versus the unrelated word pair "price-way") was not enough to activate the hippocampus when it was "task-unrelated". Generally, we proposed that, through participating in forming of "task-related" asso- ciations and consolidating of episodic memory, hippocampus enabled the organism to keep the in- formation that owned great survival values in mind for future usage.

关键词：海马细胞生物时间相关性分析

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