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MOF衍生多孔碳基材料的制备及其在锂离子电容器负极中的应用进展

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储能科学与技术 2024年第8期13卷 2665-2678页

作者：孔妍妍张熊安亚斌李晨孙现众王凯马衍伟郑州大学材料科学与工程学院河南郑州450001 中国科学院电工研究所北京100190

锂离子电容器是一种兼具锂离子电池和超级电容器两者特点的新型功率型储能器件。然而,锂离子电容器电池型负极的动力学要慢于电容器型正极,导致其功率密度低、循环稳定性差等问题。金属有机骨架(metalorganic frameworks,MOF)衍生多孔... 详细信息

锂离子电容器是一种兼具锂离子电池和超级电容器两者特点的新型功率型储能器件。然而,锂离子电容器电池型负极的动力学要慢于电容器型正极,导致其功率密度低、循环稳定性差等问题。金属有机骨架(metalorganic frameworks,MOF)衍生多孔碳基材料以其大比表面积的多孔结构,以及出色的化学稳定性等优点,成为电化学储能领域的研究热点。本文首先分析了锂离子电容器电极材料面对的挑战,阐述了锂离子电容器的储能机制。随后分析了碳化温度、热处理时间等碳化工艺对MOF衍生多孔碳基材料理化性质的影响,并着重讨论了受碳化工艺影响制备得到的不同产物组分类型。随后总结了MOF衍生多孔碳基材料在锂离子电容器中的应用进展,提出了与其他碳材料进行复合或掺杂改性是实现高功率密度、高能量密度的锂离子电容器负极材料的重要途径,最后对MOF衍生碳基电极材料的发展前景予以展望。

关键词：锂离子电容器负极材料金属有机框架多孔碳

The influencing mechanism of pro-environmental behaviors in the private domain on those in the public domain

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Chinese Journal of Population,Resources and Environment 2023年第4期21卷 212-218页

作者： Jianguo Wang yanyan kong School of Management Zhejiang University of Finance and EconomicsHangzhou310018China China Research Institute of Regulation and Public Policy Hangzhou310018China School of Information Science and Engineering Zhejiang Sci-Tech UniversityHangzhou310018China

From the perspective of regulatory focus theory,the influencing mechanism of pro-environmental behaviors(PEBs)in the private domain on behaviors in the public domain were analyzed by revealing the mediating ef‐fect of the status quo maintenance and the moderating effect of the prevention focus *** study re‐sults show that PEBs in the private domain significantly promote individuals’PEBs in the public *** status quo maintenance partially mediates the relationship between PEBs in the private and public ***,individuals with a high-level prevention focus orientation strengthen the relationship between the PEBs in the private domain and the status quo maintenance,and that of the PEBs in the public ***‐fore,individuals with a high-level prevention focus will more likely engage in subsequent PEBs in the public domain after their initial PEBs in the private domain due to their increased status quo maintenance *** and practitioners should pay attention to the prevention-repetition effect and use the PEBs in the private domain to promote those in the public domain.

关键词： Regulatory focus theory Pro-environmental behaviors PEBs in the private domain PEBs in the public domain Status quo maintenance

三极管共射放大实验电路频率特性的测试与分析

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大学物理实验 2024年第4期37卷 12-17页

作者：杨俊秀赵文来孔艳岩浙江理工大学信息科学与工程学院浙江杭州310018

三极管共射放大电路实验是模拟电子技术基本实验之一,实验前基于Multisim波特图得到幅频特性及相频特性曲线。经与理论分析对照,有两个现象:一是上限截止频率远大于理论估算值;二是相频特性曲线在中频段某频率点发生-180°到180°相位... 详细信息

三极管共射放大电路实验是模拟电子技术基本实验之一,实验前基于Multisim波特图得到幅频特性及相频特性曲线。经与理论分析对照,有两个现象:一是上限截止频率远大于理论估算值;二是相频特性曲线在中频段某频率点发生-180°到180°相位跳变。针对第一个现象,实验后对测试数据利用Python进行处理,表明幅频特性下限频率点理论值、仿真值与测试值基本一致;上限频率点介于理论值与仿真值之间。针对第二个现象,经Python绘制了理论相频特性曲线,用示波器实测输入、输出信号的李莎如图形,表明没有相位的跳变。

关键词：模拟电子技术实验教学 Python 数据处理

腹针结合重复经颅磁刺激治疗老年失眠症患者的效果分析

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系统医学 2024年第16期9卷 163-166页

作者：徐涛孔佩佩袁青晨徐宝鑫刘长燕孔燕燕青岛市黄岛区人民医院中医科山东青岛266400

目的分析腹针结合重复经颅磁刺激治疗老年失眠症患者的临床效果。方法目的选取青岛市黄岛区人民医院中医科于2022年2月—2023年4月收治的60例失眠症患者,根据治疗方式不同分成两组,探究组、常规组,每组30例,探究组应用腹针结合重复经... 详细信息

目的分析腹针结合重复经颅磁刺激治疗老年失眠症患者的临床效果。方法目的选取青岛市黄岛区人民医院中医科于2022年2月—2023年4月收治的60例失眠症患者,根据治疗方式不同分成两组,探究组、常规组,每组30例,探究组应用腹针结合重复经颅磁刺激治疗,常规组采取交变磁场治疗,对比两组治疗有效率、治疗前后睡眠质量评分。结果探究组治疗有效率为96.00%(24/25),高于常规组的68.00%(17/25),差异有统计学意义(χ^(2)=6.639,P<0.001);治疗后,与常规组相比,探究组睡眠质量得分明显降低,差异有统计学意义(P均<0.05)。结论腹部针灸结合低频率反复经颅磁疗可以提高老年失眠患者的睡眠质量和情感状态。

关键词：重复经颅磁刺激治疗腹针睡眠质量

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基于有限元的传输线接头及波导波长仿真实验设计

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大学物理实验 2024年第5期37卷 72-77页

作者：赵文来杨俊秀孔艳岩吕军浙江理工大学信息科学与工程学院浙江杭州310018

电磁场理论是公认的难教、难学和难用,电磁场实验是学生认识电磁场应用的一个窗口。引入有限元现代仿真工具Maxwell及HFSS,通过图形图像诠释抽象的矢量方程。以高压传输线为例,基于Maxwell仿真接头电场分布;以矩形空气波导传输线为例,基... 详细信息

电磁场理论是公认的难教、难学和难用,电磁场实验是学生认识电磁场应用的一个窗口。引入有限元现代仿真工具Maxwell及HFSS,通过图形图像诠释抽象的矢量方程。以高压传输线为例,基于Maxwell仿真接头电场分布;以矩形空气波导传输线为例,基于HFSS分析电磁场的周期性分布。实验以解决电磁场问题为依据,通过理论分析、建模仿真和实际操作形成完善的电磁场实验经历,培养学生利用电磁场理论进行分析和解决问题的能力,提升学习兴趣和工程实践能力。

关键词：电磁场实验教学矩形波导

Study of chemical kinetics on labeling of ^(99m)Tc-N-ethyl-N_2S_2-Memantine

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Nuclear Science and Techniques 2012年第1期23卷 52-56页

作者： CAO Guoxian ZHOU Xingqin LIU Yingtao kong yanyan ZHANG Jiankang Key Laboratory of Nuclear Medicine Ministry of HealthWuxi 214063China Key Laboratory of Molecular Nuclear Medicine of Jiangsu Wuxi 214063China jiangsu Institute of Nuclear Medicine Wuxi 214063China

In this work,a calculation method of chemical kinetics was established for labeling reaction of 99mTc-N-ethyl-N2S2-memantine,a potential NMDA receptor imaging agent prepared in our *** groups of vials (3 vials per group) were added with 0.02 mL (1 mg/mL) N-ethyl-N2S2Memantine,0.08 mL (40 mg/mL) GH,0.05 mL (10 mg/mL) EDTA-2Na,0.035 mL (2 mg/mL) SnF2,0.8 mL phosphate buffer(1mol/L,pH 6.5) and 37 MBq *** vials were incubated at 70℃,80℃,90℃ or 100℃.Samples were taken with capillary from the vials at 2,5,10,20,30,40 and *** yields were determined by *** of reaction n,rate constant k,activation energy Ea and half life t1/2 of labeling reaction were calculated with the kinetics software we *** labeling yields of 99m Tc-N-ethyl-N2S2-memantine at 2,5,10,20,30,40 and 60min were (1) 13.5,15.7,34.0,64.8,81.9,91.4 and 95.4 at 70℃;(2) 13.2,20.5,40.1,70.0,88.2,94.5 and 95.6 at 80℃;(3) 15.6,22.9,43.7,74.3,87.2,93.4 and 96.1 at 90℃;and (4) 20.5,25.8,45.3,81.1,92.2,95.6 and 96.0 at 100℃.The other parameters were;n =1;k=0.053,0.061,0.063 and 0.076 L/min at 70℃,80℃,90℃ and 100℃,respectively;Ea=12.38 kJ/L;t1/2=13.11,11.45,11.05 and 9.07min at 70℃,80℃,90℃ and 100℃,*** mean labeling yield increased with temperature and time,optimized at 100℃ and *** concentration of 99mTc-N-ethyl-N2S2-Memantine was larger than that of Na99mTcO4,so n=*** k increased with reaction,hence the accelerated reaction rate at higher *** labeling reaction was not so difficult because of the low *** t1/2 decreased with increasing reaction temperature,hence the acceleration of labeling reaction.

关键词：化学动力学乙基标签反应速率常数金 NMDA受体 EDTA二钠磷酸盐缓冲液

Preparation of ^(99m)Tc-PQQE and preliminary biological evaluation for the NMDA receptor

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Nuclear Science and Techniques 2013年第3期24卷 31-38页

作者： ZHOU Xingqin kong yanyan ZOU Meifen ZHANG Jiankang CAO Guoxian Key Laboratory of Nuclear Medicine Ministry of HealthJiangsu Key Laboratory of Molecular Nuclear MedicineJiangsu Institute of Nuclear Medicine

The 4,5-dioxo-4,5-dihydro-1H-pyrrolo(2,3-f)quinoline-2,7,9-tricarboxylic acid 2-ethyl ester 7,9-dimethyl ester (PQQE) was synthesized on the basis of Pyrroloquinoline quinine (PQQ). 99m Tc-PQQE was prepared using stannous fluoride (SnF 2 ) as reducing agent. Biological characteristics of 99m Tc-PQQE include lipophilic and the charge properties were compared to 99m Tc-PQQ. The biodistributions of 99m Tc-PQQE in mice and brain regional distribution were performed. In vivo distribution of 99m Tc-PQQE in mice indicates that the concentration ratio of drug and blood increases steadily over time. The major radioactivity may be metabolized by the hepatic and renal system. The elimination-phase half-time (t1/2β) results indicate that the residence time of 99m Tc-PQQE (203.92) in the body is twice as long as 99m Tc-PQQ (100.45). The uptake of 99m Tc-PQQE in brain was improved due to the ameliorating of charge and lipophilicity. The highest total regional brain uptake of 99m Tc-PQQE was in the frontal lobe and hippocampus, where the NMDA receptor is very abundant. 99m Tc-PQQE had a good target to nontarget ratio (hippocampus/cerebellum) which preserved a higher value (peak 4.0 at 120 min) from 60 min to 180 min after injection. In vitro autoradiographic results are in close agreement with the regional brain map. The enrichment can be blocked by N-methyl-D-aspartate receptor (NMDAR) redox modulatory site antagonists-ebselen (EB). This work suggests that 99m Tc-PQQE has some specific targeting to the NMDA receptor.

关键词： NMDA受体生物学评价 N-甲基-D-天冬氨酸受体制备吡咯喹啉醌停留时间生物学特性放射性物质

A Generic Strategy to Create Mechanically Interlocked Nanocomposite/Hydrogel Hybrid Electrodes for Epidermal Electronics

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Nano-Micro Letters 2024年第5期16卷 120-133页

作者： Qian Wang yanyan Li Yong Lin Yuping Sun Chong Bai Haorun Guo Ting Fang Gaohua Hu Yanqing Lu Desheng kong College of Engineering and Applied Sciences National Laboratory of Solid State Microstructureand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023People’s Republic of China State Key Laboratory of Analytical Chemistry for Life Science and Jiangsu Key Laboratory of Artificial Functional MaterialsNanjing UniversityNanjing 210023People’s Republic of China College of Chemical Engineering and Technology Engineering Research Center of Seawater Utilization Technology of Ministry of EducationState Key Laboratory of Reliability and Intelligence of Electrical EquipmentHebei University of TechnologyTianjin 300130People’s Republic of China Key Laboratory of Intelligent Optical Sensing and Manipulation Nanjing UniversityNanjing 210093People’s Republic of China

Stretchable electronics are crucial enablers for next-generation wearables intimately integrated into the human *** the primary compliant conductors used in these devices,metallic nanostructure/elastomer composites often struggle to form conformal contact with the textured *** electrodes have been consequently developed based on conductive nanocomposite and soft hydrogels to establish seamless skin-device ***,chemical modifications are typically needed for reliable bonding,which can alter their original *** overcome this limitation,this study presents a facile fabrication approach for mechanically interlocked nanocomposite/hydrogel hybrid *** this physical process,soft microfoams are thermally laminated on silver nanowire nanocomposites as a porous interface,which forms an interpenetrating network with the *** microfoam-enabled bonding strategy is generally compatible with various *** resulting interlocked hybrids have a 28-fold improved interfacial toughness compared to directly stacked *** electrodes achieve firm attachment to the skin and low contact impedance using tissue-adhesive *** have been successfully integrated into an epidermal sleeve to distinguish hand gestures by sensing mus-cle *** nanocomposite/hydrogel hybrids reported here offer a promising platform to combine the benefits of both materials for epidermal devices and systems.

关键词： Stretchable electronics Epidermal electronics Silver nanowire Conductive nanocomposites Hydrogel

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页岩气开发水基钻屑中含油率的测定方法研究

西南石油大学学报（自然科学版） 2021年第3期43卷 111-116页

作者：梁敏孔燕燕四川水利职业技术学院资源环境工程系四川成都611200 中国石油川庆钻探工程有限公司钻井液技术服务公司四川成都610000

以页岩气开发过程中产生的废弃水基钻屑中含油率测试方法为研究对象,采用超声协同萃取法对模拟水基钻屑中油类污染物萃取,以四氯化碳和四氯乙烯为萃取剂,考察在不同的萃取条件(温度、超声功率、时间、液固比)下萃取,利用红外测油仪测量... 详细信息

以页岩气开发过程中产生的废弃水基钻屑中含油率测试方法为研究对象,采用超声协同萃取法对模拟水基钻屑中油类污染物萃取,以四氯化碳和四氯乙烯为萃取剂,考察在不同的萃取条件(温度、超声功率、时间、液固比)下萃取,利用红外测油仪测量时对其含油率的影响。结果表明,在超声协同萃取的温度为25℃,功率为120W,时间为20 min,液固比为4 mL/g时,两种萃取剂对模拟水基钻屑(含油率≤10%)中萃取后测量其含油率都在9.6%以上,相对误差<5%,四氯化碳的萃取效率高于四氯乙烯;对页岩气开发平台现场的废弃水基钻屑与模拟水基钻屑中的含油率进行对比测量,并计算其加标回收率和相对标准偏差R_(SD),两者R_(SD)<5%,加标回收率高。两类萃取剂在相同的萃取条件下对水基钻屑中含油率测试结果变化规律一致,可选择对环境危害较小的四氯乙烯作为水基钻屑中含油率测试的萃取剂,测试结果精度满足测试要求。

关键词：水基钻屑超声协同萃取含油率红外测油加标回收