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In-situ magnetic field enhanced performances in ferromagnetic FeCo_(2)O_(4) nanofibers-based rechargeable Zinc-air batteries

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Journal of Energy Chemistry 2023年第3期78卷 447-453,I0013页

作者： Zhengmei Zhang Lei jia Tong li Jinmei Qian Xiaolei liang Desheng Xue Daqiang Gao Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education Lanzhou UniversityLanzhou 730000GansuChina Key Laboratory of Atomic and Molecular Physics&Function Material of Gansu Province Northwest Normal UniversityLanzhou 730070GansuChina Department of Obstetrics and Gynecology Key Laboratory for Gynecologic Oncology Gansu Provincethe First Hospital of Lanzhou UniversityLanzhou 730000GansuChina

Field-assisted electrocatalytic reactions are demonstrated to be sufficient strategies in enhancing the electrocatalyst activities for oxygen evolution reaction(OER).Here,we report the in-situ magnetic field enhanced electrocatalytic activity in ferromagnetic FeCo_(2)O_(4)*** results demonstrate that the overpotential of FeCo_(2)O_(4)nanofibers at 10 mA cm^(-2)shows a left-shift of 40 mV for the OER by applying an external magnetic field,and no obvious change has been observed in the non-ferromagnetic-order *** results indicate that there are more overlaps between the density of states for Co3d and O 2p by applying an external magnetic ***,the spin hybridization of 3d-2p and the kinetics of spin charge transfer are optimized in ferromagnetic FeCo_(2)O_(4),which can promote the adsorption of oxygen-intermediates and electron transfer,significantly improving its electrocatalytic ***’s more,the maximum power density of the FeCo_(2)O_(4)nanofibers based Zn-air battery(ZAB)increases from 97.3 mW cm^(-2)to 108.2 mW cm^(-2)by applying an external magnetic field,providing a new idea for the application of magnetic cathode electrocatalysts in ZABs.

关键词： In-situ magneticﬁeld Oxygen evolution reaction Spin hybridization Zn-air battery

Evaluation on a 400 Wh kg^(-1)lithium-sulfur pouch cell

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Journal of Energy Chemistry 2022年第3期31卷 24-29,I0002页

作者： Ge Ye Meng Zhao li-Peng Hou Wei-Jing Chen Xue-Qiang Zhang Bo-Quan li jia-Qi Huang School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Beijing Key Laboratory of lignocellulosic Chemistry Beijing Forestry UniversityBeijing 100083China

lithium–sulfur(li–S)batteries are highly regarded as next-generation energy storage devices due to their ultrahigh theoretical energy density of 2600 Wh kg^(−1).However,practical high-energy-density li–S pouch cells suffer from limited cycling lifespan with rapid loss of active ***,systematic evaluation on a 400 Wh kg^(−1)li–S pouch cell is carried out to reveal the working and failure mechanism of li–S batteries under practical *** morphology,spatial distribution and species analysis of sulfur,and capacity retention of electrodes are respectively evaluated after the first cycle of discharge or *** lithium polysulfides are found in electrolyte even at the end of discharge or charge,where the sulfur redox reactions are reversible with high capacity ***,severe morphology change is identified on lithium metal anode,yet there remains substantial active lithium to support the following *** work not only demonstrates unique behaviors of li–S batteries under practical conditions,which is essential for promoting the progress of li–S pouch cells,but also affords a systematic evaluation methodology to guide further investigation on high-energy-density li–S batteries.

关键词： lithium-sulfur batteries Pouch cell High energy density Failure analysis

多种技术不同维度分析兰索拉唑肠溶片溶出度异常原因

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中国药科大学学报 2024年第2期55卷 224-229页

作者：刘文欣李岩袁耀佐贾欢欢陈民辉张锦琳江苏省食品药品监督检验研究院国家药品监督管理局化学药品杂质谱研究重点实验室南京210019 中国药科大学药学院南京211198

利用激光红外成像技术和轨道阱高分辨质谱技术分析兰索拉唑肠溶制剂抽检中样品溶出度异常的原因并提出改进建议。按照法定标准对抽检制剂进行检验,一批样品的溶出度低于限度,其他项目均符合规定。考虑到本品对酸、碱不稳定,结合对生产... 详细信息

利用激光红外成像技术和轨道阱高分辨质谱技术分析兰索拉唑肠溶制剂抽检中样品溶出度异常的原因并提出改进建议。按照法定标准对抽检制剂进行检验,一批样品的溶出度低于限度,其他项目均符合规定。考虑到本品对酸、碱不稳定,结合对生产企业飞行检查的结论,从不同维度设计实验考察该批次样品溶出度异常的原因,包括高温高湿的贮存环境对样品关键质量属性的影响、2 h抗酸实验对溶出度的影响、片芯成像及包衣层厚度测定、有关物质色谱条件优化、杂质谱分析等。研究发现,流通环节贮存不当和样品包衣工艺差是引起该批次样品溶出度低的原因。流通环节可能出现的高温高湿贮存环境引起样品中崩解剂功效下降,主药难以完全释放;包衣液不能均匀包裹于片芯,引起隔离层薄且厚度不一,继而影响其保护主药防止酸降解的效果。两者共同造成该批次样品溶出度偏低。兰索拉唑肠溶制剂总体质量较好,但部分企业处方和工艺需要优化;流通环节需要严格按照规定控制温湿度。

关键词：兰索拉唑肠溶制剂药品抽检溶出度药用辅料制剂工艺杂质谱

CAR联合心肺复苏持续时间对心脏骤停患者预后的预测价值

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中华急诊医学杂志 2024年第7期33卷 955-962页

作者：周岩兰超雷如意张强吕青张唐娟贾新雅李仁杰郑州大学第一附属医院急诊医学科河南省心肺脑复苏工程研究中心郑州450052

目的探讨C反应蛋白与白蛋白的比值(C-reactive protein to albumin ratio,CAR)及联合指标对心脏骤停(cardiac arrest,CA)患者预后的预测价值。方法回顾性分析2021年1月至2023年5月郑州大学第一附属医院收治的心肺复苏(cardiopulmonary r... 详细信息

目的探讨C反应蛋白与白蛋白的比值(C-reactive protein to albumin ratio,CAR)及联合指标对心脏骤停(cardiac arrest,CA)患者预后的预测价值。方法回顾性分析2021年1月至2023年5月郑州大学第一附属医院收治的心肺复苏(cardiopulmonary resuscitation,CPR)后自主循环恢复患者,根据出院时存活状态分为存活组和死亡组,比较两组基线特征、心肺复苏抢救资料以及实验室指标。将有统计学意义的指标进行多因素Logistic回归分析,寻找影响CA患者预后的独立危险因素。绘制受试者工作特征曲线(ROC曲线),分析各独立影响因素及联合指标对CA患者预后的预测价值。结果共纳入145例患者,存活组33例,死亡组112例。患者CPR持续时间、升压药物使用剂量、ICU住院天数、入ICU时的急性生理与慢性健康评分Ⅱ、乳酸、纤维蛋白原、谷草转氨酶、白蛋白、降钙素原、C反应蛋白、CAR、肌红蛋白、肌酸激酶同工酶在存活组与死亡组间的差异有统计学意义(均P1.455、CPR持续时间>11.5 min时提示患者预后较差。

关键词：心脏骤停心肺复苏 C反应蛋白白蛋白心肺复苏持续时间预后

Direct demonstration of triplet excimer in purely organic room temperature phosphorescence through rational molecular design

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light(Science & Applications) 2022年第6期11卷 1218-1226页

作者： Zhenjiang liu Yu Tian Jie Yang Aisen li Yunsheng Wang jia Ren Manman Fang Ben Zhong Tang Zhen li Institute of Molecular Aggregation Science Tianjin UniversityTianjin 300072China Joint School of National University of Singapore Tianjin UniversityInternational Campus of Tianjin UniversityBinhai New CityFuzhou 350207China Shenzhen Institute of Molecular Aggregate Science and Engineering School of Science and EngineeringThe Chinese University of Hong KongShenzhenGuangdong 518172China Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistryTianjin UniversityTianjin 300072China Department of Chemistry Wuhan UniversityWuhan 430072China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China

Organic luminogens with room temperature phosphorescence(RTP)have been paid great attention and developed rapidly for their wide application *** now,the internal mechanism and source of phosphorescence are still obscure,especially for the relationship between molecular dimer and RTP ***,we designed and synthesized eight phenothiazine 5,5-dioxide derivatives to directly reveal how the monomer and dimer in packing affect the RTP *** with strongπ-πstacking(θ<20.66°;d<3.86A)lead to pure triplet excimer emission,while those with weakπ-πstacking(27.02°<θ<40.64°;3.84A

关键词： RTP excimer rational

应用于食品检测领域的分子即时检测技术研究进展

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食品安全质量检测学报 2024年第1期15卷 48-56页

作者：王薇付群郑艳敏王波刘岩刘佳孙万平苏州大学药学院苏州215000 苏州工业园区食品药品安全稽查大队苏州215000 苏州市疾病预防控制中心苏州215000

食品安全问题关系人类民生。为有效预防和控制食品安全风险,减少食品安全经济损失,迫切需要开发出针对食源性病原体、食物掺假、转基因作物的高特异性、高敏感性、快速的核酸检测技术。即时检测(point-of-care testing,POCT)作为一种新... 详细信息

食品安全问题关系人类民生。为有效预防和控制食品安全风险,减少食品安全经济损失,迫切需要开发出针对食源性病原体、食物掺假、转基因作物的高特异性、高敏感性、快速的核酸检测技术。即时检测(point-of-care testing,POCT)作为一种新兴的快速检测手段,由于其检测速度快、操作简单、现场检查等特点,在食品检测领域应用广泛。本文首先介绍了POCT技术的发展历史,而后根据食品安全事件的特点,从食源性致病菌、食物掺假、转基因作物3个方向分析了食品检测的主要对象,阐述了分子POCT技术在食品检测领域的应用现状,最后对应用于食品检测领域的分子POCT技术存在的问题和解决办法进行了分析总结,对食品检测分子POCT技术的发展方向进行了展望。本文有助于进一步了解分子POCT技术在食品检测中的应用,并为分子POCT技术在食品快速检测中的研究和应用提供参考。

关键词：食品检测分子即时检测食品安全等温扩增技术成簇规律间隔短回文重复序列及其相关系统检测技术

3D printing of architectured graphene-based aerogels by cross-linking GO inks with adjustable viscoelasticity for energy storage devices

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Rare Metals 2023年第3期42卷 971-981页

作者： San-Can Han jia-Le Quan Fu-Guo Zhou Yu-Hua Xue Na li Feng-Yu li Ding Wang School of Materials Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China

Three-dimensional(3D)functional graphenebased architecture with superior electrical conductivity and good mechanical strength has promising applications in energy storage and ***-adjustable inks make it possible to achieve desired 3D architectures with interconnected and continuous interior networks by microextrusion *** this work,ultra-low-concentration graphene oxide(GO)inks of~15 mg·ml-1 have been obtained and demonstrated in direct 3D printing with a facile cross-linking(direct ink writing).The rheological behavior of the GO strategy by cations,which is the lowest concentration to achieve direct ink writing inks,could be adjusted from 1×10^(4) to 1×10^(5) Pa·s^(-1) with different concentrations of cations due to strong cross-linking networks between GO sheets and ***,the specific strength and electrical conductivity of 3D-printed graphene architecture are notably enhanced,reaching up to 51.7×10^(3) N·m·kg^(-1)and 119 S·m^(-1),which are superior to conventional graphene ***,3D printing graphene-based architecture assembled in micro-superc apacitor exhibits excellent electrochemical performance,which can be ascribed to the effective ion transportation through the interconnected *** strategy demonstrated is useful in the design of complex-shaped,graphene-based architectures for scalable manufacturing of practical energy storage applications.

关键词： Three-dimensional(3D)printing Graphene oxide(GO)inks Cross-linking strategy Graphene-based architecture

A review of research on central crack in continuous casting strand

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Journal of Iron and Steel Research(International) 2023年第6期30卷 1073-1089页

作者： Yong-kun Yang jia-yu Zhu Wei-an Wang Yang Wang jian-li Wang Guan-jie Wang Xiao-ming li School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an 710055ShaanxiChina

Central crack is a common quality defect in continuous casting strand,which is difficult to fully weld in the rolling and forging processes,and has become a key technical problem that restricts the stable production of high-end alloy rod/forging/*** recent years,the central crack control has been one of the main focuses in high quality steel *** order to fully understand the central crack,the research status of central crack characteristics,formation mechanism,influencing factors,and control methods in the world was *** deficiencies in the research of the central crack and the key research directions in the future were pointed out,which will provide references for other scholars in this field of *** is found that alloying elements segregation during solidification and inclusions precipitated at grain boundaries are the main reasons for the central crack formation,while the unreasonable application of production processes can also induce the initiation of central *** optimization of alloying element composition and production process is helpful to reduce the initiation of central *** addition,the quantitative characterization mechanism based on steel grades,temperature,stress,and other factors induced central crack should be established in the further study,forming a systematic quantitative determination criterion and control strategy for coupling the composition,process and thermal/mechanical characteristic.

关键词： Central crack Continuous casting strand Formation mechanism Alloying element Control strategy

基于液质联用技术比较郁香忍冬花蕾与金银花化学成分

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中成药 2024年第3期46卷 850-859页

作者：金莹熊乐文蒲高斌张芳李佳张龙霏张永清山东中医药大学济南长清250300

目的比较郁香忍冬花蕾与金银花的成分差异,评估郁香忍冬花蕾药用价值,为其开发利用提供参考。方法以70%甲醇为提取溶剂,以UPLC-TOF-MS分析成分种类,以HPLC-QQQ-MS测定成分含量,经多元统计分析确定成分差异。结果在郁香忍冬花蕾与金... 详细信息

目的比较郁香忍冬花蕾与金银花的成分差异,评估郁香忍冬花蕾药用价值,为其开发利用提供参考。方法以70%甲醇为提取溶剂,以UPLC-TOF-MS分析成分种类,以HPLC-QQQ-MS测定成分含量,经多元统计分析确定成分差异。结果在郁香忍冬花蕾与金银花中共鉴定出52种成分,20种定量成分含量差异显著,金银花有4种差异成分,郁香忍冬花蕾的异绿原酸C、阿魏酸、木犀草苷、芦丁含量是金银花的2倍以上,马钱酸、马钱苷含量分别是金银花的11.96、37.23倍。马钱苷、异绿原酸A、马钱酸、芦丁及断马钱酸是区分郁香忍冬花蕾及金银花的关键差异成分。结论郁香忍冬花蕾与金银花成分种类相近,但含量差异明显,郁香忍冬花蕾具有重要药用价值,可进一步开发利用。

关键词：郁香忍冬金银花液质联用多元统计分析