检索结果-南通市图书馆

Rare Metals 2024年第8期43卷 3961-3973页

作者： Jia-Liang An Ming-Yong Wang Yong-Zheng Jia Jin-Tao Zhang Bao-Yan Feng Shu-Qiang Jiao State key {1. of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China College of material Science and Engineering Hebei Province Laboratory of Inorganic Nonmetallic MaterialsNorth China University of Science and TechnologyTangshan 063210China

A promising method for the preparation of pure metallic vanadium via V_(2)CO anode electrolysis was proposed and *** simple and controllable synthesis of a molten chloride salt containing VCl_(2) by an insitu reaction between VCl_(3) and metallic vanadium was verified through thermodynamic analysis and ***-KCl-VCl_(2) molten salt exhibited excellent recycling performance and could be repetitively used to prepare metallic vanadium by V_(2)CO *** V^(2+) ions remained in the molten salt after *** electrolysis conditions,such as the cathode diameter,current density,V^(2+) ion concentration,and temperature,were optimised to maximise the current *** was also simulated to reveal the regulatory *** highest current efficiency was 85%.The purity of metallic vanadium was up to 99.8%.In this study,an easy and efficient preparation of pure metallic vanadium was achieved.

关键词： V_(2)CO Metallic vanadium Current efficiency Molten salt electrolysis

λ/20-Thick cavity for mimicking electromagnetically induced transparency at telecommunication wavelengths

在线全文

学校读者我要写书评

暂无评论

Advanced Photonics 2024年第3期6卷 42-50页

作者： Hua Lu Shouhao Shi Dikun Li Shuwen Bo Jianxu Zhao Dong Mao Jianlin Zhao Northwestern Polytechnical University School of Physical Science and TechnologyMOE Key Laboratory of Material Physics and Chemistry under Extraordinary ConditionsKey Laboratory of Light-Field Manipulation and Information AcquisitionMinistry of Industry and Information TechnologyShaanxi Key Laboratory of Optical Information TechnologyXi’anChina

Optical cavities play crucial roles in enhanced light-matter interaction,light control,and optical communications,but their dimensions are limited by the material property and operating *** planar cavities are urgently in demand for large-area and integrated optical ***,extremely reducing the planar cavity dimension is a critical challenge,especially at telecommunication ***,we demonstrate a type of ultrathin cavities based on large-area grown Bi_(2)Te_(3)topological insulator(TI)nanofilms,which present distinct optical resonance in the near-infrared *** result shows that the Bi_(2)Te_(3)TI material presents ultrahigh refractive indices of>6 at telecommunication *** cavity thickness can approach 1.20 of the resonance wavelength,superior to those of planar cavities based on conventional Si and Ge high refractive index ***,we observed an analog of the electromagnetically induced transparency(EIT)effect at telecommunication wavelengths by depositing the cavity on a photonic *** EIT-like behavior is derived from the destructive interference coupling between the nanocavity resonance and Tamm *** spectral response depends on the nanocavity thickness,whose adjustment enables the generation of obvious Fano *** experiments agree well with the *** work will open a new door for ultrathin cavities and applications of TI materials in light control and devices.

关键词： topological insulator optical nanocavity photonic crystal electromagnetically induced transparency-like effect

Unveiling oscillatory nature for sustainable fuel production

在线全文

学校读者我要写书评

暂无评论

National Science Review 2024年第05期11卷 90-91页

作者： Ning Han Ye Wang Bao-Lian Su Department of materials Engineering State key {1. of Physical chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials National Engineering Laboratory for Green Chemical Productions of Alcohols Ethers and Esters College of Chemistry and Chemical Engineering Xiamen University laboratory of {1. materials chemistry(CMI) University of Namur State key {1. of Advanced Technology for materials Synthesis and Processing Wuhan University of Technology

A century ago, in 1.23, Franz Fischer and Hans Tropsch introduced the groundbreaking Fischer–Tropsch (FT) synthesis, a heterogeneous catalytic process used to convert synthesis gas (syngas,CO+H2) into multi-carbon hydrocarbons [1.. Over the past 1.0 years, FT synthesis has emerged as a pivotal method for converting non-petroleum resources into exceptionally clean fuels or valuable chemicals via syngas [2–4].

关键词： CO HYDROGENATION CATALYSTS BEHAVIOR KINETICS

Enantioselective copper-catalyzed dearomative borylative cyclization of indoles and mechanistic insights

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China chemistry 2024年

作者： Yanfei Li Xuetao Li Zheng Zhang Yiliang Zhang Xiuping Yuan Jianjun Yin Simin Wang Wei Guan Qian Zhang Tao Xiong Jilin Province key {1. of Organic functional Molecular Design & Synthesis Department of Chemistry Northeast Normal University School of chemistry and Chemical Engineering Harbin Normal University Institute of functional {1. chemistry Department of Chemistry Northeast Normal University State key {1. of Organometallic chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences

Alicyclic nitrogen heterocycles, such as enantioenriched polycyclic fused [1.2-a]indoline derivatives, are widespread in natural products, agrochemicals and pharmaceutical agents. Existing methods predominantly rely on the recent emerging Heck-type catalytic asymmetric dearomatization（CADA） protocol, wherein noble palladium catalysts commonly necessitate the form arylPd species-triggered these transformations. In contrast, a more sustainable base metal catalysis paradigm through alkyl metal species disrupting the aromaticity, that is, the utilization of challenging asymmetric Csp3–Csp3bond formation entry to such important chiral densely functionalized polycyclic molecular scaffolds, remains an elusive task. Herein, we report the first copper-catalyzed dearomative borylative cyclization of indoles under mild reaction conditions, affording an array of valuable Bpin-containing pyrrolo-fused [1.2-a]indolines bearing four consecutive stereogenic centers with excellent enantioand diastereoselectivity. The synthetic potential was documented via an array of useful transformations. Density functional theory（DFT） calculation studies elucidated the origin of the chemo-, regio-, enantio-and diastereoselectivities of this conversion.

关键词：

Biological Interaction and Imaging of Ultrasmall Gold Nanoparticles

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第3期16卷 69-98页

作者： Dongmiao Sang Xiaoxi Luo Jinbin Liu key {1. of functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640People’s Republic of China

Ultrasmall gold nanoparticles(AuNPs)typically includes atomically precise gold nanoclusters(AuNCs)and AuNPs with a core size below 3 *** as a bridge between small molecules and traditional inorganic nanoparticles,the ultrasmall AuNPs show the unique advantages of both small molecules(e.g.,rapid distribution,renal clearance,low non-specific organ accumulation)and nanoparticles(e.g.,long blood circulation and enhanced permeability and retention effect).The emergence of ultrasmall AuNPs creates significant opportunities to address many challenges in the health field including disease diagnosis,monitoring and *** the nano–bio interaction dictates the overall biological applications of the ultrasmall AuNPs,this review elucidates the recent advances in the biological interactions and imaging of ultrasmall *** begin with the introduction of the factors that influence the cellular interactions of ultrasmall *** then discuss the organ interactions,especially focus on the interactions of the liver and *** further present the recent advances in the tumor interactions of ultrasmall *** addition,the imaging performance of the ultrasmall AuNPs is summarized and ***,we summarize this review and provide some perspective on the future research direction of the ultrasmall AuNPs,aiming to accelerate their clinical translation.

关键词： Ultrasmall gold nanoparticle Cellular interaction Organ interaction Tumor interaction Bioimaging

Recent progress in heterostructured materials for room-temperature sodium-sulfur batteries

在线全文

学校读者我要写书评

暂无评论

Interdisciplinary materials 2024年第4期3卷 565-594页

作者： Haobin Song Yifan Li Xue LLi Yixiang Li Dong-sheng Li Deli Wang Shaozhuan Huang Hui Ying Yang Pillar of Engineering Product Development Singapore University of Technology and DesignSingaporeSingapore key {1. of inorganic Nonmetallic Crystalline and Energy Conversion materials College of Materials and Chemical EngineeringChina Three Gorges UniversityYichangChina key {1. of material chemistry for Energy Conversion and Storage Ministry of EducationHubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhanChina key {1. of Catalysis and Energy materials chemistry of Ministry of Education&Hubei key {1. of Catalysis and materials Science South-Central Minzu UniversityWuhanChina

Room-temperature sodium-sulfur(RT Na-S)batteries are a promising next-generation energy storage device due to their low cost,high energy density(1.74 Wh kg^(-1.),and environmental ***,RT Na-S batteries face a series of vital challenges from sulfur cathode and sodium anode:(i)sluggish reaction kinetics of S and Na_(2)S/Na_(2)S_(2);(ii)severe shuttle effect from the dissolved intermediate sodium polysulfides(NaPSs);(iii)huge volume expansion induced by the change from S to Na_(2)S;(iv)continuous growth of sodium metal dendrites,leading to short-circuiting of the battery;(v)huge volume expansion/contraction of sodium anode upon sodium plating/stripping,causing uncontrollable solid-state electrolyte interphase growth and“dead sodium”*** strategies have been proposed to address these issues,including physical/chemical adsorption of NaPSs,catalysts to facilitate the rapid conversion of NaPSs,high-conductive materials to promote ion/electron transfer,good sodiophilic Na anode hetero-interface homogenized Na ions flux and three-dimensional porous anode host to buffer the volume expansion of *** materials can combine these merits into one material to realize ***,the recent development of heterostructure as the host for sulfur cathode and Na anode has been *** of all,the electrochemical mechanisms of sulfur cathode/sodium anode and principles of heterostructures reinforced Na-S batteries are ***,the application of heterostructures in Na-S batteries is comprehensively ***,the current primary avenues of employing heterostructures in Na-S batteries are *** and prospects are put forward regarding the existing problems in current research,aiming to inspire the design of advanced and improved next-generation Na-S batteries.

关键词： heterostructured materials polysulfides shuttle effect sodiophilic Na anode sodium sulfur

利用过渡金属氧化物调控金属铋纳米片的p轨道从而实现CO_(2)的高效电还原

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

Science China materials 2024年第6期67卷 1965-1974页

作者：尹伟勃刘博文王晓蕾王文倩宋子辰任志宇付宏刚 key {1. of functional inorganic material chemistry Ministry of Education of ChinaSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080China key {1. of Superlight materials and Surface Technology of Ministry of Education College of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China

p-d轨道之间的相互作用是一种提升电催化性能的有效方法.然而,其对主族金属的电催化CO_(2)还原(eCO_(2)RR)的增强机制尚不清晰.因此,我们向金属Bi纳米片中引入了一系列过渡金属氧化物(TMO:Fe_(2)O_(3)、Co_(3)O_(4)、NiO),并以此研究引... 详细信息

p-d轨道之间的相互作用是一种提升电催化性能的有效方法.然而,其对主族金属的电催化CO_(2)还原(eCO_(2)RR)的增强机制尚不清晰.因此,我们向金属Bi纳米片中引入了一系列过渡金属氧化物(TMO:Fe_(2)O_(3)、Co_(3)O_(4)、NiO),并以此研究引入TMO对Bi物种eCO_(2)RR性能的影响.根据原位傅里叶变换红外光谱(FTIR)和CO_(2)-程序升温脱附(TPD)的结果,Bi/TMO中的TMO可以增强CO_(2)的吸附和活化能力.密度泛函理论(DFT)计算结果表明,Bi活性位点^(*)OCHO吸附能及p轨道的优化可以降低CO_(2)到^(*)OCHO过程和^(*)OCHO到HCOOH过程的理论过电位.同时,由于Bi与TMO之间因复合而发生的电子重排也促进了催化剂与反应物之间的电子传输.因此,在热力学和动力学的双重作用下,Bi/TMO中的Bi活性位点表现出最佳的催化能力,在更宽的电位区间内实现了更高的催化活性和甲酸选择性.其中,Bi/Fe_(2)O_(3)的增强效果最为显著.在500 mV的宽电位区间内达到较高的甲酸的法拉第效率(>90%),在-0.8 VRHE时,甲酸的法拉第效率达到最大值99.7%(Bi的1.1.倍),甲酸局部电流密度达到1..65 mA cm^(-2)(Bi的1.86倍).这一研究不仅建立了eCO_(2)RR性能增强与引入TMO之间的关系,也为理性设计高性能电催化剂提供了一条实用的、可扩展的途径.

关键词： transition metal oxides Bi/Fe_(2)O_(3)nanosheets elec-trocatalytic CO_(2)reduction HCOOH p-orbital regulation

Recent advances in flexible self-oscillating actuators

在线全文

学校读者我要写书评

暂无评论

eScience 2024年第5期4卷 91-109页

作者： Jingjing Li Wenjin Guo Weiqiang Zhao Yutian Zhu Jie Bai Zhigang Xia Xiang Zhou Zunfeng Liu School of Textile Science and Engineering State Key Laboratory of New Textile Materials and Advanced Processing TechnologiesWuhan Textile UniversityWuhan 430200China State key {1. of Medicinal Chemical Biology Key Laboratory of Functional Polymer MaterialsTianjin Key Laboratory of Functional Polymer MaterialsSmart Sensing Interdisciplinary Science CenterCollege of ChemistryNankai UniversityTianjin 300350China College of material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of EducationKey Laboratory of Organosilicon Material TechnologyHangzhou Normal UniversityHangzhou 311121China College of chemistry and Chemical Engineering Inner Mongolia Univ TechnolChem Engn CollHohhot 010051China Department of Science China Pharmaceutical UniversityNanjing 211198China

Soft actuators are constituted by a type of intelligent materials,and they can generate reversible mechanical motions under external *** usually achieve continuous actuation by manual turning on or off the power supply,which significantly increases the operation *** contrast,self-oscillating actuators can achieve autonomous motions under constant stimuli,and have recently attained great advancements,as well as promoted the development of autonomous soft *** this review,the latest achievements of soft oscillators are ***,the self-oscillating mechanisms mainly including oscillating chemical reactions and self-shadowing-induced mechanical negative feedback loops are *** oscillators constructed with various materials and configurations,driven by different stimuli and applied in different fields are then presented in ***,the difficulties and hopes of oscillators are ***,self-oscillating actuators are in the stage of vigorous development,and we believe that in the future,they will be used in various fields and make many scenarios more intelligent and autonomous.

关键词： Oscillating actuator Artificial muscles Polymer composite Biomimetic Smart materials

Biomimetic design of highly flexible metal oxide nanofibrous membranes with exceptional mechanical performance for superior phosphopeptide enrichment

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

Nano Research 2024年第5期17卷 4270-4278页

作者： Xue Mao Zhen-Zhen Li Dong-Lian Hao Wei-Dong Han Gao-Peng Li Yao-Yu Wang Kun Zhang School of Textile Science and Engineering Key Laboratory of Functional Textile Material and Product(Ministry of Education)Xi’an Polytechnic UniversityXi’an 710048China key {1. of Magnetic Molecules&Magnetic Information materials of the Ministry of Education School of Chemistry&Material ScienceShanxi Normal UniversityTaiyuan 030031China Department of Clinical laboratory The Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710004China Shanghai iProteome Biotechnology Co. LtdShanghai 201210China College of chemistry&{1.s Science Northwest UniversityXi'an 710127China

Developing free-standing and mechanical robust membrane materials capable of superior enrichment of phosphopeptides for analyzing and identifying the specific phosphoproteome of cancer cells is significant in understanding the molecular mechanisms of cancer development and exploring new therapeutic approaches,but still a significant challenge in materials *** this end,we firstly constructed highly flexible ZrTiO_(4) nanofibrous membranes(NFMs)with excellent mechanical stability through a cost-effective and scalable electrospinning and subsequent calcination ***,to further increase the enrichment capacity of the phosphopeptide,the biomimetic TiO_(2)@ZrTiO_(4) NFMs with root hair or leaf like branch microstructure are developed by the hydrothermal post-synthetic modification of ZrTiO_(4) NFMs through growing unfurling TiO_(2) nanosheets onto the ZrTiO_(4) ***,remarkable flexibility and mechanical stability enable the resulting TiO_(2)@ZrTiO_(4) NFMs excellent practicability,while the biomimetic microstructure allows it outstanding enrichment ability of the phosphopeptide and identification ability of the specific phosphoproteins in the digest of cervical cancer ***,6770 phosphopeptides can be enriched by TiO_(2)@ZrTiO_(4) NFMs(2205 corresponding phosphoproteins can be identified),and the value is much higher than that of ZrTiO_(4) NFMs(6399 phosphopeptides and 21.2 identified phosphoproteins)and commercial high-performance TiO_(2) particles(4525 phosphopeptides and 1.1. identified phosphoproteins).These results demonstrate the super ability of TiO_(2)@ZrTiO_(4) NFMs in phosphopeptide enrichment and great potential for exploring the pathogenesis of cancer.

关键词： inorganic nanofibers flexible ceramic nanofibrous membranes biomimetic materials exceptional mechanical performance flexibility

Efficient wide-bandgap perovskite solar cells with open-circuit voltage deficit below 0.4 V via hole-selective interface engineering

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

Science China chemistry 2024年第6期67卷 2102-2110页

作者： Xiaoyu Ji Shuo Zhang Furong Yu Huidong Zhang Liqing Zhan Yue Hu Wei-Hong Zhu Yongzhen Wu key {1. for Advanced materials and Joint International Research {1. of Precision chemistry and Molecular Engineering Shanghai Key Laboratory of Functional Materials ChemistryFrontiers Science Center for Materiobiology and Dynamic ChemistryInstitute of Fine ChemicalsSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai200237China School of chemistry University of EdinburghKing’s BuildingsEdinburghEH93FJUK

Wide-bandgap mixed-halide perovskite solar cells(WBG-PSCs)are promising top cells for efficient tandem photovoltaics to achieve high power conversion efficiency(PCE)at low ***,the open-circuit voltage(V_(OC))of WBG-PSCs is still unsatisfactory as the V_(OC)-deficit is generally larger than 0.45 ***,we report a buried interface engineering strategy that substantially improves the V_(OC)of WBG-PSCs by inserting amphiphilic molecular hole-selective materials featuring with a cyanovinyl phosphonic acid(CPA)anchoring group between the perovskite and *** assembly and redistribution of CPA-based amphiphilic molecules at the perovskite-substrate buried interface not only promotes the growth of a low-defect crystalline perovskite thin film,but also suppresses the photo-induced halide phase *** energy level alignment between wide-bandgap perovskite and the hole-selective layer is further improved by modulating the substituents on the triphenylamine donor moiety(methoxyls for MPA-CPA,methyls for Me PA-CPA,and bare TPA-CPA).Using a 1.68 e V bandgap perovskite,the Me PA-CPA-based devices achieved an unprecedentedly high V_(OC)of 1.29 V and PCE of 22.3%under standard AM 1.5 *** V_(OC)-deficit(<0.40 V)is the lowest value reported for *** work not only provides an effective approach to decreasing the V_(OC)-deficit of WBG-PSCs,but also confirms the importance of energy level alignment at the charge-selective layers in PSCs.

关键词： cyanovinyl phosphonic acid energy level alignment hole-selective material open-circuit voltage wide-bandgap perovskite