检索结果-南通市图书馆

Intercalation-deintercalation design in MXenes for high-performance supercapacitors

在线全文

学校读者我要写书评

暂无评论

Nano Research 2022年第4期15卷 3213-3221页

作者： Zhenjiang li Jun Dai Yiran li Changlong Sun Alan Meng renfei Cheng Jian Zhao Minmin Hu Xiaohui Wang School of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266061China College of Electromechanical Engineering Qingdao University of Science and TechnologyQingdao 266061China Department of Mechanical Engineering City University of Hong KongHong Kong 999077China State Key Laboratory Base of Eco-chemical Engineering College of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

MXene is a new intercalation pseudocapacitive electrode material for supercapacitor *** fast ion diffusion is significantly essential for MXene to achieve excellent electrochemical *** expansion of interlayer void by traditional spontaneous species intercalation always leads to a slight increase in capacitance due to the existence of species sacrificing the smooth diffusion of electrolyte ***,an effective intercalation-deintercalation interlayer design strategy is proposed to help MXene achieve higher *** cation intercalation leads to the expansion of interlayer *** electrochemical cation extraction,intercalated cations are deintercalated mostly,leaving a small number of cations trapped in the interlayer silt and serving as pillars to maintain the interlayer space,offering an open,unobstructed interlayer space for better ion migration and ***,a preferred surface with more-O terminations for redox reaction is created due to the reaction between cations and-OH *** a result,the processed MXene delivers a much improved capacitance compared to that of the original Ti_(3)C_(2)T_(x)electrode(T stands for the surface termination groups,such as-OH,-F,and-O).This study demonstrates an improvement of electrochemical performance of MXene electrodes by controlling the interlayer structure and surface chemistry.

关键词： MXene electrochemical ion intercalation−deintercalation interlayer design supercapacitor energy storage

IPATH 200引导系统在磁共振介入术中的临床应用价值

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

实用肿瘤学杂志 2003年第3期17卷 191-193页

作者：王剑锋张同李任飞杨光李微青申宝忠哈尔滨医科大学第三临床医学院介入科哈尔滨150040

目的评价Ipath 200光学引导系统在MR导引活检和介入治疗中的临床应用价值。方法报告49例Ipath 200系统的临床应用,其中42例活检、7例介入性治疗。活检部位包括胸部16例、腹部26例。介入性硬化剂治疗7例(其中肾囊肿硬化剂治疗4例,肝囊... 详细信息

目的评价Ipath 200光学引导系统在MR导引活检和介入治疗中的临床应用价值。方法报告49例Ipath 200系统的临床应用,其中42例活检、7例介入性治疗。活检部位包括胸部16例、腹部26例。介入性硬化剂治疗7例(其中肾囊肿硬化剂治疗4例,肝囊肿硬化剂治疗3例)。结果穿刺准确率为100％,活检正确率为95％(40例),介入治疗成功率为100％。无出血、感染、气胸等严重并发症。结论应用Ipath 200光学引导系统做腿导引下活检和介入治疗具有安全、定位准确、穿刺成功率高等优点,具有应用价值。

关键词：磁共振介入术 IPATH200引导系统介入治疗临床应用活检 MRI 介入放射学

Tunnel-structured willemite Zn_(2)SiO_(4):Electronic structure,elastic,and thermal properties

在线全文

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2022年第8期11卷 1249-1262页

作者： Ruqiao DAI renfei CHENG Jiemin WANG Chao ZHANG Cuiyu li Hailong WANG Xiaohui WANG Yanchun ZHOU Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Advanced Computing East China Sub-center Suma Technology Company LimitedKunshan 215300China School of Material Science and Engineering Zhengzhou UniversityZhengzhou 450001China Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials&Processing TechnologyBeijing 100076China

Willemite Zn_(2)SiO_(4)crystallizes in such a way that Zn and Si are tetrahedrally coordinated with O in an ionic–covalent manner to form ZnO_(4)and SiO_(4)tetrahedra as the building *** tetrahedra are corner-sharing,of which one SiO_(4)tetrahedron connects eight ZnO_(4)tetrahedra,and one ZnO_(4)tetrahedron links four ZnO_(4)tetrahedra and four SiO_(4)*** unique crystallographic configuration gives rise to parallel tunnels with a diameter of 5.7Åalong the c-axis *** tunnel structure of Zn_(2)SiO_(4)definitely correlates with its interesting elastic and thermal *** the one hand,the elastic modulus,coefficient of thermal expansion(CTE),and thermal conductivity are ***_(2)SiO_(4)has low Vickers hardness of 6.6 GPa at 10 N and low thermal conductivity of 2.34 W/(m·K)at 1073 *** the other hand,the elastic modulus and CTE along the c-axis are significantly larger than those along the a-and b-axes,showing obvious elastic and thermal expansion ***,the Young’s modulus along the z direction(Ez=179 GPa)is almost twice those in the x and y directions(Ex=Ey=93 GPa).The high thermal expansion anisotropy is ascribed to the empty tunnels along the c-axis,which are capable of more accommodating the thermal expansion along the a-and *** striking properties of Zn_(2)SiO_(4)in elastic modulus,hardness,CTE,and thermal conductivity make it much useful in various fields of ceramics,such as low thermal expansion,thermal insulation,and machining tools.

关键词： Zn_(2)SiO_(4) electronic structure elastic properties thermal expansion thermal conductivity

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

洨河沉积物中有机物、氮、磷浓度分布特征

环境工程技术学报 2018年第3期8卷 241-247页

作者：李任飞檀文炳高如泰黄彩红张慧李丹何小松席北斗兰州交通大学环境与市政工程学院甘肃兰州730070 中国环境科学研究院地下水与环境系统工程创新基地北京100012 环境基准与风险评估国家重点实验室中国环境科学研究院北京100012

海河流域由于水资源匮乏,污染河水被用于灌溉的情况较为普遍,存在严峻的环境风险。研究了海河流域典型纳污河流洨河沉积物中有机物(OM)和不同形态氮、磷浓度与分布,分析了洨河沉积物沉积和释放的机理及其可能产生的环境影响。结果表明:... 详细信息

海河流域由于水资源匮乏,污染河水被用于灌溉的情况较为普遍,存在严峻的环境风险。研究了海河流域典型纳污河流洨河沉积物中有机物(OM)和不同形态氮、磷浓度与分布,分析了洨河沉积物沉积和释放的机理及其可能产生的环境影响。结果表明:沉积物中总氮(TN)的沉积和释放机理与OM类似,沉积物中OM和TN浓度分布与河水中的不相关,可能是由于沉积物中OM与TN浓度在不同河段受不同因子控制,在沉积物未疏浚河段,OM与TN主要源于深层沉积物向表层沉积物中的扩散释放,而在底泥疏浚河段,沉积物中OM与TN浓度与水利条件以及微生物活动等多种因素有关;沉积物中总磷(TP)浓度与水体中的相关性不显著,可能是因为钙磷(Ca-P)与铁铝磷(Fe/Al-P)会结合成某种难溶性磷;沉积物中TP浓度与TN、OM浓度相关性不显著,因为沉积物对磷的吸附主要与水体中的Ca^(2+)、Al^(3+)、Fe^(2+)(或Fe^(3+))浓度有关。

关键词：洨河沉积物有机物氮磷沉积和释放机理污灌

Regulating the Electron Localization of Metallic Bismuth for Boosting CO_(2)Electroreduction

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2022年第2期14卷 296-310页

作者： Dan Wu renfei Feng Chenyu Xu Peng-Fei Sui Jiujun Zhang Xian-Zhu Fu Jing-li Luo Shenzhen Key Laboratory of Polymer Science and Technology Guangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen 518060People’s Republic of China Canadian light Source Inc. SaskatoonSaskatchewan S7N 0X4Canada Department of Chemical and Materials Engineering University of AlbertaEdmontonAB T6G 1H9Canada Institute for Sustainable Energy/College of Science Shanghai UniversityShanghai 200444People’s Republic of China

Electrochemical reduction of CO_(2)to formate is economically attractive but improving the reaction selectivity and activity remains ***,we introduce boron(B)atoms to modify the local electronic structure of bismuth with positive valence sites for boosting conversion of CO_(2)into formate with high activity and selectivity in a wide potential *** combining experimental and computational investigations,our study indicates that B dopant differentiates the proton participations of rate-determining steps in CO_(2)reduction and in the competing hydrogen *** comparing the experimental observations with the density functional theory,the dominant mechanistic pathway of B promoted formate generation and the B concentration modulated effects on the catalytic property of Bi are *** comprehensive study offers deep mechanistic insights into the reaction pathway at an atomic and molecular level and provides an effective strategy for the rational design of highly active and selective electrocatalysts for efficient CO_(2)conversion.

关键词： CO_(2)reduction Bismuth Proton transport Electron localization Boron

Co-and N-doped carbon nanotubes with hierarchical pores derived from metal-organic nanotubes for oxygen reduction reaction

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2021年第2期30卷 49-55,I0002页

作者： Xuewan Wang Xiuan Xi Ge Huo Chenyu Xu Pengfei Sui renfei Feng Xian-Zhu Fu Jing-li Luo College of Materials Science and Engineering Shenzhen UniversityShenzhen 518060GuangdongChina Department of Chemical and Materials Engineering University of AlbertaEdmonton T6G 1H9AlbertaCanada Canadian light Source Saskatoon S7N 2V3SaskatchewanCanada

Biomolecules with a broad range of structure and heteroatom-containing groups offer a great opportunity for rational design of promising electrocatalysts via versatile *** this study,uniform folic acid-Co nanotubes(FA-Co NTs) were hydrothermally prepared as sacrificial templates for highly porous Co and N co-doped carbon nanotubes(Co-N/CNTs) with well-controlled size and *** formation mechanism of FA-Co NTs was investigated and FA-Co-hydrazine coordination interaction together with the H-bond interaction between FA molecules was characterized to be the driving force for growth of one-dimensional *** distinct metal-ligand interaction afforded the resultant CNTs rich Co-N_x sites,hierarchically porous structure and Co nanoparticle-embedded conductive network,thus an overall good electrocatalytic activity for oxygen *** tests showed that Co-N/CNTs-900 promoted an efficient 4 e ORR process with an onset potential of 0.908 V ***,a limiting current density of 5.66 mA cm^(-2) at 0.6 V and a H_2 O_2 yield lower than 5%,comparable to that of 20%Pt/C ***,the catalyst revealed very high stability upon continuous operation and remarkable tolerance to methanol.

关键词： Folic acid Metal–organic nanotube Carbon nanotube In situ doping Oxygen reduction

Designing a photo-assisted Co-C_(3)N_(4) cathode for high performance li-O_(2) batteries

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第6期16卷 8405-8410页

作者： renfei Cao Yangfeng Cui Gang Huang Wanqiang liu Jianwei liu Xinbo Zhang School of Materials Science and Engineering Changchun University of Science and TechnologyChangchun 130022China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

li-O_(2) batteries with extremely high specific energy density have been regarded as a kind of promising successor to current li-ion ***,the high charge overpotential for the decomposition of li_(2)O_(2) discharge product reduces the energy efficiency and triggers a series of side reactions that cause the li-O_(2) batteries to have a limited ***,Co-doped C_(3)N_(4)(Co-C_(3)N_(4))photocatalysts were designed by an in situ thermal evaporation method to take advantage of the photo-assisted charging technology to conquer the shortcomings of li-O_(2) batteries encountered in the charge *** from the commonly used photocatalysts,the Co-C_(3)N_(4) photocatalysts perform well no matter with and without illumination,owing to the Co doping induced conductivity and electrocatalytic ability *** makes the Co-C_(3)N_(4) reduce the charge and discharge overpotentials and improve the cycling performance of li-O_(2) batteries(from 20 to 106 cycles)without *** introducing illumination,the performance can be further improved:Charge voltage reduces to 3.3 V,and the energy efficiency increases to 84.84%,indicating that the Co-C_(3)N_(4) could behave as a suitable photocathode for li-O_(2) ***,the low charge voltage and the continuous illumination together weaken the corrosion of the li anode,making the long-term high-efficiency operation of li-O_(2) batteries no longer just extravagant hope.

关键词： low overpotential photocatalysis lithium peroxide Co-doped C_(3)N_(4)(Co-C_(3)N_(4)) li-O_(2)batteries

Development of a Novel Reverse Transcription Loop-Mediated Isothermal Amplification Method for Rapid Detection of SARS-CoV-2

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Virologica Sinica 2020年第3期35卷 344-347页

作者： renfei Lu Xiuming Wu Zhenzhou Wan Yingxue li Lulu Zuo Jianru Qin Xia Jin Chiyu Zhang Clinical Laboratory Nantong Third Hospital Affiliated to Nantong UniversityNantong 226006China Pathogen Discovery and Evolution Unit Institut Pasteur of ShanghaiChinese Academy of SciencesShanghai 200031China Medical Laboratory of Taizhou Fourth People’s Hospital Taizhou 225300China College of life Sciences Henan Normal UniversityXinxiang 453007China Shanghai Public Health Clinical Center Fudan UniversityJinshan DistrictShanghai 201508China

Dear Editor,Since early December 2019, a large outbreak of pneumonia caused by a novel coronavirus(COVID-19) had emerged in Wuhan, China(Wu et al. 2020 a, b;Zhou et al. 2020;Zhu et al. 2020;Jiang and Shi 2020). Similar to severe acute respiratory syndrome coronavirus(SARS-CoV) and Middle East respiratory syndrome coronavirus(MERS-CoV),the new coronavirus also belongs to Betacoronavirus。

关键词： al. respiratory acute

Interfacial Electronic Modulation of Dual-Monodispersed Pt–Ni_(3)S_(2) as Efficacious Bi-Functional Electrocatalysts for Concurrent H_(2) Evolution and Methanol Selective Oxidation

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第4期16卷 415-431页

作者： Qianqian Zhao Bin Zhao Xin Long renfei Feng Mohsen Shakouri Alisa Paterson Qunfeng Xiao Yu Zhang Xian‑Zhu Fu Jing‑li Luo Shenzhen Key Laboratory of Energy Electrocatalytic Materials Shenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen 518060People’s Republic of China Canadian light Source Inc. SaskatoonSK S7N 0X4Canada Instrumental Analysis Center of Shenzhen University(lihu Campus) Shenzhen UniversityShenzhen 518055People’s Republic of China

Constructing the efficacious and applicable bifunctional electrocatalysts and establishing out the mechanisms of organic electro-oxidation by replacing anodic oxygen evolution reaction(OER) are critical to the development of electrochemicallydriven technologies for efficient hydrogen production and avoid CO_(2) emission. Herein, the hetero-nanocrystals between monodispersed Pt(~ 2 nm) and Ni_(3)S_(2)(~ 9.6 nm) are constructed as active electrocatalysts through interfacial electronic modulation, which exhibit superior bi-functional activities for methanol selective oxidation and H_(2) generation. The experimental and theoretical studies reveal that the asymmetrical charge distribution at Pt–Ni_(3)S_(2) could be modulated by the electronic interaction at the interface of dual-monodispersed heterojunctions, which thus promote the adsorption/desorption of the chemical intermediates at the interface. As a result, the selective conversion from CH_(3)OH to formate is accomplished at very low potentials(1.45 V) to attain 100 m A cm^(-2) with high electronic utilization rate(~ 98%) and without CO_(2) emission. Meanwhile, the Pt–Ni_(3)S_(2) can simultaneously exhibit a broad potential window with outstanding stability and large current densities for hydrogen evolution reaction(HER) at the cathode. Further, the excellent bi-functional performance is also indicated in the coupled methanol oxidation reaction(MOR)//HER reactor by only requiring a cell voltage of 1.60 V to achieve a current density of 50 m A cm^(-2) with good reusability.

关键词： Dual-monodispersed heterostructure Electronic interactive modulation Reaction mechanism Methanol oxidation reaction Hydrogen generation