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Platinum nanowires catalyzed direct amidation of aldehydes and amines

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Science China Chemistry 2016年第4期59卷 478-481页

作者： Dawei Xu Linyan Shi Danhua Ge xueqin cao Hongwei Gu Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University

Different from the conventional synthesis methods and substrates, we designed a brand new method for synthesizing amides with platinum nanowires as catalysts and tert-butylhydroperoxide(TBHP) as the oxidant. Influence of factors, such as the catalyst, solvents, and the reaction temperature, were studied to determine the optimal reaction conditions. In addition, we explored the substrate generality and observed excellent yields.

关键词： aldehyde amine amide amidation Pt nanowires

Carbon nitride transparent counter electrode prepared by magnetron sputtering for a dye-sensitized solar cell

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Green Energy & Environment 2017年第3期2卷 302-309页

作者： Chaoyu Wu Guoran Li xueqin cao Bao Lei Xueping Gao Institute of New Energy Material Chemistry School of Materials Science and Engineering National Institure for Advanced Materials Nankai University Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin Key Laboratory of Metal and Molecule Based Material ChemistryNankai University

Carbon nitride(CN_x) films supported on fluorine-doped tin oxide(FTO) glass are prepared by radio frequency magnetron sputtering, in which the film thicknesses are 90-100 nm, and the element components in the CNX films are in the range of x = 0.15-0.25. The as-prepared CN_x is for the first time used as counter electrode for dye-sensitized solar cells(DSSCs), and show a preparation-temperature dependent electrochemical performance. X-ray photoelectron spectroscopy(XPS) demonstrates that there is a higher proportion of sp^2 C=C and sp^3 C-N hybridized bonds in CN_x-500(the sample treated at 500 ℃) than in CNX-RT(the sample without a heat treatment). It is proposed that the sp^2 C=C and sp^3 C-N hybridized bonds in the CN_x films are helpful for improving the electrocatalytic activities in DSSCs. Meanwhile, Raman spectra also prove that CN_x-500 has a relatively high graphitization level that means an increasing electrical conductivity. This further explains why the sample after the heat treatment has a higher electrochemical performance in DSSCs. In addition, the as-prepared CN_x counter electrodes have a good light transmittance in the visible light region. The results are meaningful for developing low-cost metal-free transparent counter electrodes for DSSCs.

关键词： Solar cells Counter electrodes Carbon nitride Electrocatalysis Magnetron sputtering

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信息设备液冷技术研究

电子质量 2024年第5期 70-74页

作者：曹学勤张玲郭丰王娟中国电子学会北京100036

液冷具有远高于气冷的冷却能力。近年来,随着信息设备热流密度的不断提高,液冷技术受到广泛的关注。目前信息设备已发展出相变浸没式、单相浸没式、喷淋式、常规水冷板式、温水冷板式、非水冷板式、水冷型热管冷板式和富液相变冷板式等... 详细信息

液冷具有远高于气冷的冷却能力。近年来,随着信息设备热流密度的不断提高,液冷技术受到广泛的关注。目前信息设备已发展出相变浸没式、单相浸没式、喷淋式、常规水冷板式、温水冷板式、非水冷板式、水冷型热管冷板式和富液相变冷板式等多种形式液冷技术路线。对各液冷技术路线进行了归纳和总结,并对未来的发展趋势进行了探讨,认为各技术路线均在发展过程中,目前还没有终极解决方案。并认为最先建立起产业链和生态圈的技术解决方案将更容易在竞争中胜出,通过标准化工具实现分工与合作的精细化与专业化将是液冷技术发展的必由之路。

关键词：信息设备液冷研究

Metal–Oleate Complex?Derived Bimetallic Oxides Nanoparticles Encapsulated in 3D Graphene Networks as Anodes for Efficient Lithium Storage with Pseudocapacitance

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Nano-Micro Letters 2019年第1期11卷 250-263页

作者： Yingying cao Kaiming Geng Hongbo Geng Huixiang Ang Jie Pei Yayuan Liu xueqin cao Junwei Zheng Hongwei Gu Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science and Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow University School of Chemical Engineering and Light Industry Guangdong University of Technology School of Chemical and Biomedical Engineering Nanyang Technological University College of Physics Optoelectronic and Energy Soochow University

In this manuscript, we have demonstrated the delicate design and synthesis of bimetallic oxides nanoparticles derived from metal–oleate complex embedded in 3D graphene networks(MnO/CoMn_2O_4  GN), as an anode material for lithium ion batteries. The novel synthesis of the MnO/CoMn_2O_4  GN consists of thermal decomposition of metal–oleate complex containing cobalt and manganese metals and oleate ligand, forming bimetallic oxides nanoparticles, followed by a selfassembly route with reduced graphene oxides. The MnO/CoMn_2O_4  GN composite, with a unique architecture of bimetallic oxides nanoparticles encapsulated in 3D graphene networks, rationally integrates several benefits including shortening the di usion path of Li^+ ions, improving electrical conductivity and mitigating volume variation during cycling. Studies show that the electrochemical reaction processes of MnO/Co Mn_2O_4  GN electrodes are dominated by the pseudocapacitive behavior, leading to fast Li^+ charge/discharge reactions. As a result, the MnO/CoMn_2O_4  GN manifests high initial specific capacity, stable cycling performance, and excellent rate capability.

关键词： Metal–oleate complex Bimetallic oxides nanoparticles Porous architecture 3D graphene networks Lithium ion batteries

Efficient and ligand free palladium catalyst for Suzuki and Heck cross-coupling reactions

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Science China Chemistry 2014年第9期57卷 1310-1314页

作者： LUO Bin WANG JiaQing GE DanHua LI XinMing cao xueqin PAN Yue GU HongWei Key Laboratory of Organic Synthesis of Jiangsu Province College of ChemistryChemical Engineering and Materials ScienceSoochow University

A simple and efficient system for Suzuki cross-coupling reactions was developed using a ligandless catalyst of Pd nanoclusters generated in situ from Pd(acac)2. The cross-coupling reactions proceeded under mild reaction conditions with a high reaction rate(5 min) to give various biaryls in high yields. The system also exhibited catalytic potential for Heck reaction between aryl bromides and styrene.

关键词： Suzuki coupling ligand free Heck reaction Pd(acac)2 biaryl

嵌入式体外膜肺氧合联合连续性肾脏代替疗法规范化护理指标的构建

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上海护理 2024年第5期24卷 48-53页

作者：曹雪琴吴洁华冷夏华陈云云南昌大学第二附属医院江西南昌330006

目的构建嵌入式体外膜肺氧合(ECMO)联合连续性肾脏代替疗法(CRRT)的规范化护理指标,为医护人员进行嵌入式ECMO联合CRRT护理提供临床实践依据。方法系统检索国内外数据库获取关于嵌入式ECMO联合CRRT运行中规范化护理的相关文献,包括指南... 详细信息

目的构建嵌入式体外膜肺氧合(ECMO)联合连续性肾脏代替疗法(CRRT)的规范化护理指标,为医护人员进行嵌入式ECMO联合CRRT护理提供临床实践依据。方法系统检索国内外数据库获取关于嵌入式ECMO联合CRRT运行中规范化护理的相关文献,包括指南、专家共识、证据总结、系统评价、临床决策等,并对纳入文献进行质量评价,对符合质量标准的文献进行证据提取和汇总,初拟嵌入式ECMO联合CRRT规范化护理操作流程,采用德尔菲法通过2轮专家函询形成最终方案。结果共纳入相关文献10篇,其中指南2篇,专家共识2篇,证据总结2篇,系统评价2篇,临床决策2篇。2轮专家咨询问卷的有效回收率均为100%,专家权威系数分别为0.910和0.915,变异系数分别0.12~0.29和0.05~0.21,协调系数分别为0.674、0.721。最终构建的护理指标涵盖了凝血功能护理、血气护理、通气设置、血流动力学护理、CRRT相关护理、撤机后护理6个方面共15条指标。结论基于循证和德尔菲法构建的嵌入式ECMO联合CRRT循证护理指标具有科学性和实用性,可为临床医护人员进行嵌入式ECMO联合CRRT护理提供一定的参考依据,给予患者更好的治疗体验。

关键词：体外膜氧合作用连续性肾脏替代疗法操作流程证据总结

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One-pot pyrolysis synthesis of highly active Ru/RuOx nanoclusters for water splitting

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Nano Research 2022年第2期15卷 1020-1026页

作者： Fengyuan Zhu Jiangyan Xue Lingjian Zeng Jingrui Shang Shuanglong Lu xueqin cao Brendan F.Abrahams Hongwei Gu Jianping Lang College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China School of Chemical and Material Engineering Jiangnan UniversityWuxi 214122China School of Chemistry University of MelbourneVictoria 3010Australia

Using simple methods to obtain efficient catalysts has been a long-standing goal for *** this work,the employment of a one-pot pyrolysis reaction to achieve molecular confinement,has led to the preparation of ruthenium(Ru)-based nanoclusters in a carbon matrix.A unique feature of the synthetic approach employed is that solvent and substrates were calcined *** solvent evaporates,during calcination,the substrates form a dense solid which has the effect of limiting the aggregation of Ru centers during the carbonization *** catalyst prepared in this simple manner showed an impressively high activity with respect to the hydrogen/oxygen evolution reaction(HER/OER).The Ru nanoclusters(Ru NCs),as the hydrogen evolution reaction(HER)catalysts,require ultralow overpotentials of 5 mV and 5.1 mV at-10 mA·cm^(-2) in 1.0 M KOH,and 0.5 M H_(2)SO_(4),***,the catalyst prepared by the one-pot method has higher crystallinity,a higher Ru content and an ultrafine cluster size,which contributes to its exceptional electrochemical ***,the RuO_(x) nanoclusters(RuO_(x) NCs),obtained by oxidizing the aforementioned Ru NCs,exhibited good oxygen evolution reaction(OER)performance with an overpotential of 266 mV at 10 mA·cm^(-2).When applied to overall water splitting,Ru/RuO_(x) nanoclusters as the cathode and anode catalysts can reach 10 mA·cm^(-2) at cell voltages of only 1.49 V in 1 M KOH.

关键词： pyrolysis ruthenium nanoclusters ruthenium dioxide nanoclusters hydrogen evolution reaction oxygen evolution reaction overall water splitting

改进QuEChERS-UPLC-MS/MS法测定新疆枸杞中31种农药残留

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食品安全导刊 2024年第23期 52-57页

作者：卢彬范蕊王文文陈国通严欢曹雪琴新疆维吾尔自治区分析测试研究院新疆乌鲁木齐830011

目的:建立QuEChERS-UPLC-MS/MS法测定新疆枸杞中31种农药残留的方法。方法:样品经改进后的QuEChERS法净化后,经正负离子分段扫描和多反应监测模式检测,基质匹配标准溶液外标法定量。结果:在0.001~0.200 mg·L^(-1),31种目标化合物的线... 详细信息

目的:建立QuEChERS-UPLC-MS/MS法测定新疆枸杞中31种农药残留的方法。方法:样品经改进后的QuEChERS法净化后,经正负离子分段扫描和多反应监测模式检测,基质匹配标准溶液外标法定量。结果:在0.001~0.200 mg·L^(-1),31种目标化合物的线性相关系数均>0.996。回收率为70.2%~111.4%,相对标准偏差≤11.3%,检出限为0.01~7.97μg·kg^(-1)。结论:该方法快速、简便、准确,具有较强的适用性,可用于含糖量高的枸杞试样中多种农药残留的快速筛查与确证。

关键词： QuEChERS 新疆枸杞农药残留超高效液相色谱-串联质谱/质谱法

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水产品及养殖用水中致病性微生物的快速检测方法探究

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食品工程 2024年第3期 14-16,33页

作者：范蕊王文文刘潇陈国通于丹瑾曹雪琴新疆维吾尔自治区分析测试研究院新疆乌鲁木齐830011

随着生活质量的提升,食品安全问题受到社会广泛关注,其中微生物是影响食品安全的主要因素之一。致病性微生物引发的食源性疾病是人类健康的重要威胁。研究致病菌快检技术对公共安全事件的应急处置和保障食品安全具有重要意义。对近年来... 详细信息

随着生活质量的提升,食品安全问题受到社会广泛关注,其中微生物是影响食品安全的主要因素之一。致病性微生物引发的食源性疾病是人类健康的重要威胁。研究致病菌快检技术对公共安全事件的应急处置和保障食品安全具有重要意义。对近年来食源性致病菌快速检测的研究与应用进行综述,旨在为水产品及养殖用水中致病性微生物的快速检测提供理论基础。

关键词：水产品致病性微生物快速检测技术