检索结果-南通市图书馆

Covalent Organic Framework with 3D Ordered Channel and Multi-Functional Groups Endows Zn Anode with Superior Stability

引用

Nano-Micro Letters 2024年第4期16卷 350-363页

作者： Bin Li pengchao Ruan Xieyu Xu Zhangxing He Xinyan zhu Liang Pan Ziyu peng Yangyang Liu peng Zhou Bingan Lu Lei Dai Jiang Zhou School of Chemical Engineering North China University of Science and TechnologyTangshan 063009People’s Republic of China School of Materials Science and Engineering Central South UniversityChangsha 410083People’s Republic of China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China Hunan Provincial Key Defense Laboratory of High Temperature Wear‑Resisting Materials and Preparation Technology Hunan University of Science and TechnologyXiangtan 411201People’s Republic of China School of Physics and Electronics Hunan UniversityChangsha 410082People’s Republic of China

Achieving a highly robust zinc(Zn)metal anode is extremely important for improving the performance of aqueous Zn-ion batteries(AZIBs)for advancing“carbon neutrality”society,which is hampered by the uncontrollable growth of Zn dendrite and severe side reactions including hydrogen evolution reaction,corrosion,and passivation,***,an interlayer containing fluorinated zincophilic covalent organic framework with sulfonic acid groups(COF-S-F)is developed on Zn metal(Zn@COF-S-F)as the artificial solid electrolyte interface(SEI).Sulfonic acid group(-SO_(3)H)in COF-S-F can effectively ameliorate the desolvation process of hydrated Zn ions,and the three-dimensional channel with fluoride group(-F)can provide interconnected channels for the favorable transport of Zn ions with ion-confinement effects,endowing Zn@COF-S-F with dendrite-free morphology and suppressed side ***,Zn@COF-S-F symmetric cell can stably cycle for 1,000 h with low average hysteresis voltage(50.5 m V)at the current density of 1.5 m A cm^(-2).Zn@COF-S-F|Mn O_(2)cell delivers the discharge specific capacity of 206.8 m Ah g^(-1)at the current density of 1.2 A g^(-1)after 800 cycles with high-capacity retention(87.9%).Enlightening,building artificial SEI on metallic Zn surface with targeted design has been proved as the effective strategy to foster the practical application of high-performance AZIBs.

关键词： Aqueous Zn ion batteries Covalent organic framework Interfacial modification Zn ion flux regulation Desolvation effect

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Examining the evolution of tidal creeks in the Huanghe River delta using multi-temporal Landsat images

引用

Journal of Oceanology and Limnology 2024年第4期42卷 1061-1073页

作者： Zhen HAN Kai JIN Quanli ZONG peng QIN Chunxia LIU Xiuzhi zhu Xinyue LI College of Resources and Environment Qingdao Agricultural UniversityQingdao 266109China

Coastal tidal creeks are important channels for exchanges of material and energy between sea and land,and play an important role in the ecological protection of tidal *** tidal creeks have evolved differently in various regions,the evolutionary process of tidal creeks in the Huanghe(Yellow)River delta of China,one of the most active deltas worldwide,is not entirely ***,the evolution of tidal creeks in the delta from 1981 to 2021 was investigated by quantitatively analysing the tidal creeks and developing a standard for dividing their evolution *** interpretation and supervised classification methods were applied to the Landsat images to extract the tidal creek network,and 17 groups of tidal creek systems were *** indicate that Creek S 1 was the most developed creek for having 113 tidal creeks totaling 65.8 km in length,while Creek E 3 had the fastest growth rate for having average annual increase of 1.9 ***,the level of tidal creeks increased,the average and median lengths of tidal creeks increased,and the number of tidal creeks decreased since *** evolution of the tidal creek system could be divided into four stages,namely,rising,developing,stabilizing,and *** of a representative tidal creek show that there was no degenerated tidal creek during the rising period,with an increase in the number of 50 and a length increase of 57.9 km between 1981 and *** proportion of new tidal creeks in the developing period was more than 50%and the new tidal creeks in the stabilizing period were equal to the degraded tidal *** tidal creeks were greater than 50%during the degrading *** was no fixed order of tidal creek evolution in each period,and there may be a skip in *** findings provided a reference for studying the evolution of tidal creeks.

关键词： tidal creek evolution pattern remote sensing Huanghe(Yellow)River delta

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Oblique impact breakage unification of nonspherical particles using discrete element method

引用

Particuology 2024年第7期90卷 61-71页

作者： Di peng LiGe Wang Yuquan Lin Chongqiang zhu Xizhong Chen Zhihui Liu Ruihuan Ge Shenzhen Research Institute of Shandong University Shenzhen 518057China Institute of Foundation Engineering China Academy of Building ResearchBeijing 100013China Ubiquitous Particle Ltd. TwickenhamLondon TW27AUUK Department of Smart Manufacturing and Engineering Software School of Qilu TransportationShandong UniversityJinan 250061China Department of Geotechnical Engineering Tongji UniversityShanghai 200092China School of Transportation and Civil Engineering Shandong Jiaotong UniversityJinan 250357China School of Science and Engineering University of DundeeDundee DD14HNUK Department of Chemical Engineering School of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Department of Chemical and Biological Engineering University of SheffieldSheffield S13JDUK

Particle breakage commonly occurs during processing of particulate materials,but a mechanistic model of particle impact breakage is not fully *** article presents oblique impact breakage characteristics of nonspherical particles using discrete element method(DEM)*** different particle shapes,***,cuboidal and cylindrical,are *** spheres are agglomerated with bridging bonds to model the breakage characteristics under impact *** effect of agglomerate shapes on the breakage pattern,damage ratio,and fragment size distribution is fully *** using a newly proposed oblique impact model,unified breakage master surfaces are theoretically constructed for all the particle shapes under oblique impact *** developed approach can be applied to modelling particulate processes where nonspherical particles and oblique impact breakage are prevailing.

关键词： Breakage master curve Nonspherical particle Oblique impact Equivalent velocity Discrete element method(DEM) Bonded contact model

来源：

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

Efficacy and safety of single microneedle radiofrequency *** therapy on moderate-to-severe acne vulgaris:A prospective,randomized,controlled study

引用

Chinese Medical Journal 2024年第8期137卷 1006-1008页

作者： Chuchu Huang Mengping mao Yiran peng Ben Wang Yuxuan Deng Hongfu Xie Dan Jian Department of Dermatology Xiangya HospitalCentral South UniversityChangshaHunan 410008China National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangshaHunan 410008China Hunan Key Laboratory of Aging Biology Xiangya HospitalCentral South UniversityChangshaHunan 410008China Department of Dermatology and Allergy and Christine Kühne-Center for Allergy Research and EducationUniversity Hospital of BonnD-53127BonnGermany

To the Editor:Acne vulgaris is a prevalent skin disorder affecting both physical and psychosocial health.[1]Although photodynamic therapy(PDT)exists for moderate-to-severe acne,due to its adverse reactions,we are still looking forward to a novel therapeutic option with fewer side ***,radiofrequency has been used to treat moderate acne.[2]In this study,we aimed to evaluate the efcacy and safety of moderate-to-severe acne treatment based on a single microneedle with radiofrequency(MRF)*** during three consecutive sessions through a prospective,randomized,and controlled trial study.

关键词： needle prospective randomized

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Multidisciplinary treatment of molten aluminum combined burn:An unusual case report

引用

Chinese Journal of Plastic and Reconstructive Surgery 2024年第3期6卷 135-138页

作者： Shengzhou Shan Yinbo peng Liqing Gong Zhigang mao Weirong Yu Tao Ni peng Xu Department of Plastic and Reconstructive Surgery Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai200011China

Molten aluminum is among the most common causes of burns in the metal ***,only few reports are available on molten aluminum ***,we report an unusual case of molten aluminum *** patient had burns not only on the body surface but also in the respiratory tract and esophagus,adding to the difficulty of *** consultation and cooperation led to the development of a treatment plan for the patient,which included tracheotomy,respiratory management,endoscopic therapy,infection control,and psychological *** our knowledge,this is the first report of molten aluminum-induced burns involving the face,neck,respiratory tract,esophagus,and *** also describe our experience with multidisciplinary treatment for the management of molten aluminum burns.

关键词： Molten aluminum Combined burn Multidisciplinary treatment

来源：

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

Spin effect on redox acceleration and regioselectivity in Fe-catalyzed alkyne hydrosilylation

引用

National Science Review 2024年第2期11卷 155-167页

作者： peng He Meng-Yang Hu Jin-Hong Li Tian-Zhang Qiao Yi-Lin Lu Shou-Fei zhu Frontiers Science Center for New Organic Matter State Key Laboratory and Institute of Elemento-Organic Chemistry Nankai University

Iron catalysts are ideal transition metal catalysts because of the Earths abundant, cheap, biocompatible features of iron salts. Iron catalysts often have unique open-shell structures that easily undergo spin crossover in chemical transformations, a feature rarely found in noble metal catalysts. Unfortunately, little is known currently about how the open-shell structure and spin crossover affect the reactivity and selectivity of iron catalysts, which makes the development of iron catalysts a low efficient trial-and-error program. In this paper, a combination of experiments and theoretical calculations revealed that the iron-catalyzed hydrosilylation of alkynes is typical spin-crossover catalysis. Deep insight into the electronic structures of a set of well-defined open-shell active formal Fe(0) catalysts revealed that the spin-delocalization between the iron center and the 1,10-phenanthroline ligand effectively regulates the iron center's spin and oxidation state to meet the opposite electrostatic requirements of oxidative addition and reductive elimination, respectively,and the spin crossover is essential for this electron transfer process. The triplet transition state was essential for achieving high regioselectivity through tuning the nonbonding interactions. These findings provide an important reference for understanding the effect of catalyst spin state on reaction. It is inspiring for the development of iron catalysts and other Earth-abundant metal catalysts, especially from the point of view of ligand development.

关键词： spin effect spin-delocalization spin crossover iron-catalysis alkyne hydrosilylation

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Revisiting the sodium-ion storage capability of hard carbon in carbonate-based electrolytes via a sodium-metal-free protocol

引用

Science China Chemistry 2024年第7期67卷 2240-2247页

作者： Gaopan Liu Yanbing Mo Jiawei Chen Yu peng Xiao zhu Fei Wang Xiaoli Dong Yongyao Xia Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New EnergyLaboratory of Advanced MaterialsFudan UniversityShanghai 200438China

Common evaluation methodology of sodium(Na)-containing two-electrode or three-electrode configurations overlooks the interference from highly reactive Na metal,leading to the underestimation or inconsistent performance of low-potential hard carbon(HC)***,the trap of Na metal was systematically investigated with or without applied current,uncovering its inadequacy as the reference or counter electrode in different configurations.A Na-metal-free three-electrode protocol is proposed for evaluating the actual Na^(+)-storage capability of the typical low-potential HC *** avoiding Na crosstalk and precisely controlling the working electrode's potential,the actual electrochemical performance of HC in the carbonate esterbased electrolyte can be recognized with high capacity of 222 mAh g^(-1)at 2 C and 113 mAh g^(-1)at 5 C,correcting the misunderstanding of the inferior performance of HC in coin-type half cells(68%and 50%undervaluation at 2 C and 5 C,respectively).The advanced protocol is expected to reduce misunderstandings or underestimation due to evaluation methods and to guide the development of high-performance battery materials.

关键词： highly reactive sodium potential drift carbonate ester sodium-metal-free protocol sodium storage capability

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

3D Printing of Periodic Porous Metamaterials for Tunable Electromagnetic Shielding Across Broad Frequencies

引用

Nano-Micro Letters 2024年第12期16卷 533-552页

作者： Qinniu Lv Zilin peng Haoran Pei Xinxing Zhang Yinghong Chen Huarong Zhang Xu zhu Shulong Wu State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan UniversityNo.24 South Section 1Yihuan RoadChengdu 610065People’s Republic of China Baosheng Technology Innovation Corporation Limited No.1Suzhong RoadBaoying CountyYangzhou 225800People’s Republic of China

The new-generation electronic components require a balance between electromagnetic interference shielding efficiency and open structure factors such as ventilation and heat *** addition,realizing the tunable shielding of porous shields over a wide range of wavelengths is even more *** this study,the well-prepared thermoplastic polyurethane/carbon nanotubes composites were used to fabricate the novel periodic porous flexible metamaterials using fused deposition modeling 3D ***,the investigation focuses on optimization of pore geometry,size,dislocation configuration and material thickness,thus establishing a clear correlation between structural parameters and shielding *** experimental and simulation results have validated the superior shielding performance of hexagon derived honeycomb structure over other designs,and proposed the failure shielding size(D_(f)≈λ/8-λ/5)and critical inclined angle(θf≈43°-48°),which could be used as new benchmarks for tunable electromagnetic *** addition,the proper regulation of the material thickness could remarkably enhance the maximum shielding capability(85-95 dB)and absorption coefficient A(over 0.83).The final innovative design of the porous shielding box also exhibits good shielding effectiveness across a broad frequency range(over 2.4 GHz),opening up novel pathways for individualized and diversified shielding solutions.

关键词： Polymeric component 3D printing Tunable electromagnetic shielding Periodic porous metamaterials Honeycomb pore structure

来源：

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

Optical properties of stacked liquid crystal superstructures with opposite chirality [Invited]

引用

Chinese Optics Letters 2024年第6期22卷 158-163页

作者： Lin zhu Yiheng Zhang Shijun Ge peng Chen Yanqing Lu National Laboratory of Solid State Microstructures Key Laboratory of Intelligent Optical Sensing and ManipulationCollege of Engineering and Applied Sciencesand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China

Cholesteric liquid crystal (CLC) has been widely used in flat optical elements due to the Pancharatnam–Berry(PB) phase modulation. In order to achieve PB phase modulation for both circular polarizations, it is natural to come up with stacking CLCs with opposite chirality. Here, various optical properties of diverse CLC stacking structures are systematically investigated by numerical calculations. With the thickness of the CLC sublayers becoming smaller, the reflection bandgap splits into three main parts, and the rotatory dispersion gradually becomes negligible. Vector beams provide a more intuitive verification. These results provide theoretical guidance for future studies on stacked chiral anisotropic media.

关键词： cholesteric liquid crystals Pancharatnam–Berry phases chirality vector beams

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Covalent triazine frameworks materials for photo-and electrocatalysis

引用

Nano Research 2024年第9期17卷 7830-7839页

作者： Aoji Liang Wenbin Li Anbai Li Hui peng Guofu Ma Lei zhu Ziqiang Lei Yuxi Xu Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education Key Laboratory of Polymer Materials of Gansu ProvinceCollege of Chemistry and Chemical EngineeringNorthwest Normal UniversityLanzhou 730070China School of Chemistry and Materials Science Hubei Key Laboratory of Quality Control of Characteristic Fruits and VegetablesHubei Engineering UniversityXiaogan 432000China School of Engineering Westlake UniversityHangzhou 310024China

Covalent triazine frameworks(CTFs)are a class of unique two-dimensional nitrogen-rich triazine framework with adjustable chemical and electronic structures,rich porosity,good stability and excellent semiconductivity,which enable great various applications in efficient gas/molecular adsorption and separation,energy storage and conversion,especially photo-and *** synthesis strategies strongly affect the morphology of CTFs and play an important role in their structure and *** this concept,we provide a comprehensive and systematic review of the synthesis methods such as ionothermal synthesis,phosphorus pentoxide catalytic method,polycondensation and ultra-strong acid catalyzed method,and applications of CTFs in photo-and *** we offer some insights into the future development progress of CTFs materials for catalytic applications.

关键词： covalent triazine frameworks synthetic strategy photocatalysis electrocatalysis

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：