检索结果-内蒙古大学图书馆

A Solvent-Free Covalent Organic Framework Single-Ion Conductor Based on Ion-Dipole Interaction for All-Solid-State Lithium Organic Batteries

引用

Nano-Micro Letters 2024年第12期16卷 189-200页

作者： Zhongping Li Kyeong-Seok Oh Jeong-Min Seo Wenliang Qin Soohyoung Lee Lipeng Zhai Changqing Li Jong-Beom Baek Sang-Young Lee Department of Chemical and Biomolecular Engineering Yonsei University50 Yonsei-RoSeodaemun-GuSeoul 03722Republic of Korea School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology(UNIST)50 UNIST-GilEonyang-EupUlju-GunUlsan 44919Republic of Korea Henan Key Laboratory of Functional Salt Materials Center for Advanced Materials ResearchZhongyuan University of TechnologyZhengzhou 450007People’s Republic of China Department of Battery Conflation Engineering Yonsei University50Yonsei-RoSeodaemun-GuSeoul 03772Republic of Korea Department of Battery Engineering Yonsei University50Yonsei-RoSeodaemun-GuSeoul 03772Republic of Korea

Single-ion conductors based on covalent organic frameworks(COFs)have garnered attention as a potential alternative to currently prevalent inorganic ion conductors owing to their structural uniqueness and chemical ***,the sluggish Li+conduction has hindered their practical ***,we present a class of solvent-free COF single-ion conductors(Li-COF@P)based on weak ion-dipole interaction as opposed to traditional strong ion-ion *** ion(Li+from the COF)-dipole(oxygen from poly(ethylene glycol)diacrylate embedded in the COF pores)interaction in the Li-COF@P promotes ion dissociation and Li+migration via directional ionic *** by this single-ion transport behavior,the Li-COF@P enables reversible Li plating/stripping on Li-metal electrodes and stable cycling performance(88.3%after 2000 cycles)in organic batteries(Li metal anode||5,5’-dimethyl-2,2’-bis-p-benzoquinone(Me2BBQ)cathode)under ambient operating conditions,highlighting the electrochemical viability of the Li-COF@P for all-solid-state organic batteries.

关键词： Solid organic single-ion conductors Solvent-free covalent organic frameworks All-solid-state Li organic batteries Ion-dipole interaction Pore functionalization

来源：评论

学校读者我要写书评

暂无评论

Enhanced Elastocaloric Effect and Mechanical Properties of Gd-Doped Ni-Co-Mn-Ti-Gd Metamagnetic Shape Memory Alloys

SSRN

引用

SSRN 2023年

作者： Xu, Feng Zhu, Can Wang, Jian Luo, Feng Zhu, Xinqiang Xu, Jiahui Chen, Shuquan Ma, Guoliang Chen, Fenghua Kuang, Yafei He, Jun Sun, Zhigang School of Materials Science and Engineering Taiyuan University of Science and Technology Taiyuan030024 China State Key Laboratory of Advanced Materials Composite Technology Wuhan University of Technology Wuhan430070 China Central Iron and Steel Research Institute Beijing100081 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing China

Improving elastocaloric effect (eCE) and mechanical properties is the key to developing high-performance eCE cooling materials. In this paper, the metamagnetic shape memory alloys Ni35.5Co13.5Mn35Ti15-x Gdx was successfully prepared by arc melting method, and the effects of Gd substitution for Ti on the martensitic transformation (MT) temperature, phase composition, microstructure, eCE and mechanical properties of the alloys were systematically investigated. With the introduction of Gd elements, transformation temperature shifts to low temperature, and the mechanical properties of the alloy are also enhanced. The maximum compressive strength increased from 980MPa (x=0) to 1142MPa (x=0.9). At room temperature, a large adiabatic temperature change of +13.5/-12.7 K is obtained after loading/unloading, and a constant temperature change of +5.6K/-5.5K is obtained without apparent degradation under the compressive stress of 400 MPa during 61 cycles for Ni36.5Co13.5Mn35Ti14.9Gd0.1 alloy. The underlying mechanism of the enhanced eCE and mechanical properties is also discussed. © 2023, The Authors. All rights reserved.

关键词： Titanium alloys

来源：评论

学校读者我要写书评

暂无评论

An efficient chemical reduction-induced assembly of Fe_(3)O_(4)@graphene fiber for wire-shaped supercapacitors with ultrahigh volumetric energy density

引用

science China(Technological sciences) 2021年第10期64卷 2246-2254页

作者： XIAO Peng SHI MinJie XU Li TAO FengBo LI Yu ZHU HangTian LIU YuTing LI ZhiMin ZHOU YunPeng FENG Wei State Grid Jiangsu Electric Power Co.Ltd.Research Institute Nanjing 211103China School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China State Key Laboratory of Advanced Transmission Technology Global Energy Interconnection Research Institute Co.Ltd.Beijing 102211China School of Materials Science and Engineering Tianjin UniversityTianjin 300354China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215213China

Benefiting from high flexibility and weavability,the wire-shaped supercapacitors(SCs)arouse tremendous interests for the applications in wearable/portable *** fiber(GF)is considered as a promising linear electrode for wire-shaped ***,the bottleneck is how to develop the GF-based linear electrode with facile fabrication process while wellmaintaining satisfactory electrochemical ***,a novel Fe_(3)O_(4)@GF composite linear electrode is proposed via a chemical reduction-induced assembly approach,in which the GO and Fe_(3)O_(4) nanoparticles(NPs)realize the efficient selfassembly owing to the electrostatic and van der Waals interactions,as well as the sufficient reduction of GO during the preparation *** resultant fiber-shaped architecture shows boosted charge-transfer kinetics,high flexibility and structural *** Fe_(3)O_(4)@GF linear electrode exhibits excellent electrochemical behaviors including a large volumetric specific capacitance(~250.75 F cm^(−3)),remarkable rate capability and favorable electrochemical kinetics in aqueous electrolyte,superior than previously reported GF-based linear *** real application,a high-performance wire-shaped SC with excellent flexibility and weavability is fabricated based on such Fe_(3)O_(4)@GF linear electrode and gel electrolyte,demonstrating ultrahigh volumetric energy density(18.8 mWh cm^(−3)),power density(4000 mW cm^(−3))and strong durability(~93.5%retention after 10000 cycles).Prospectively,the fabricated wire-shaped SC can maintain reliable electrochemical behaviors in various deformation states,showing its potentials in future portable and wearable devices.

关键词： wire-shaped supercapacitors self-assembly graphene fiber high energy density wearable electronics

来源：评论

学校读者我要写书评

暂无评论

Broadened and enhanced blue emission of interstitial Eu2+ in α-cristobalite via Al3+ codoping for high color rendering white LEDs

引用

Ceramics International 2025年

作者： Xia, Zhiwei Wang, Yuhan Yang, Rujun Xu, Mengdi Lin, Cunjian Li, Zhongyuan Lv, Ying Chi, Xiaopeng You, Shihai Research Institute of Frontier Science Southwest Jiaotong University Chengdu610031 China Zijin School of Geology and Mining Fuzhou University Fuzhou350108 China Nanchang Key Laboratory of Photoelectric Conversion and Energy Storage Materials College of Science Nanchang Institute of Technology Nanchang330099 China College of Materials Xiamen University Xiamen361005 China Key Laboratory of Functional Molecular Solids Ministry of Education Anhui Normal University Wuhu241000 China of Advanced Science and Technology Japan Advanced Institute of Science and Technology Nomi923-1292 Japan

The interstitial site engineering that purposely creates interstitial luminescent centers in suitable hosts has become an intriguing strategy in designing novel inorganic phosphors. However, effectively tuning the photoluminescence of interstitial activators remains tough challenging at this stage. Here, we demonstrate the effective modulation of interstitial luminescence in inorganic phosphor. In detail, the blue emission band (λem = 446 nm) of interstitial Eu2+ doped α-cristobalite (SiO2:Eu2+) is largely enhanced and broadened via a partial, aliovalent substitution of Si4+ by Al3+. After introducing Al3+ ions into SiO2 lattice, the full width at half maximum of the blue emission band increase from 59 to 76 nm with a triple growth in quantum efficiency (10.82% → 35.56%). Moreover, the thermal stability improves significantly with a high emission retention of 60% at 325 °C (SiO2:0.06Al3+,0.005Eu2+), far higher than that of the parent SiO2:0.005Eu2+ (30%). Encapsulating blue-emitting SiO2:Al3+,Eu2+ along with two commercial green and red phosphors on an ultraviolet LED chip (λem = 375 nm), a white LED device with high color rendering index (Ra > 90) was successful fabricated, showing the great potential of this phosphor for achieving high-quality white LED lighting. This study not only provides a promising bule emitter but also sheds light on modulating interstitial luminescence properties in inorganic phosphors. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Phosphors

来源：评论

学校读者我要写书评

暂无评论

Chemically synthesizing exchange-coupled SmCo_(5)/Sm_(2)Co_(17) nanocomposites

引用

Rare Metals 2021年第3期40卷 575-581页

作者： Yao-Hui Xu Qiang Jiang Kun Li Zhen-Hui Ma School of Physics and Electronic Engineering Laboratory for Functional MaterialsLeshan Normal UniversityNanjing 211189China Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments School of Mechanical EngineeringSoutheast UniversityNanjing 211189China College of Materials Science and Engineering Key Laboratory of Advanced Functional MaterialsMinistry of Education of ChinaBeijing University of TechnologyBeijing 100124China Department of Chemistry Brown UniversityProvidenceRI 02912USA

A new strategy to chemically synthesize exchange-coupled SmCo_(5)/Sm_(2) Co_(17) nanocomposites by in situ decomposition of SmCox(5<x<8.5)is reported in this *** synthesis starts with the fabrication of Co/Sm_(2... 详细信息

A new strategy to chemically synthesize exchange-coupled SmCo_(5)/Sm_(2) Co_(17) nanocomposites by in situ decomposition of SmCox(5composites with different proportions were acquired using the same *** to the in situ decomposition of SmCo_(x) intermediate,the small size(both of their size less than 10 nm)and uniform phase distribution were achieved in our ***,the as-prepared nanocomposites display a strong exchange-coupling *** a consequence,SMCo_(5)/Sm_(2)Co_(17)(Sm/Co=1:5.2)exhibits a coercivity of 1.23 T and enhanced M7 T(magnetization at 7 T)of 0.0812 A·m^(2)·g^(-1),increasing by 21%than pure SmCo_(5).Our synthesis provides a new protocol to prepare exchange-coupled high-performance nanocomposites.

关键词： SmCo_(5) Nanocomposites Exchange coupling Coercivity

来源：评论

学校读者我要写书评

暂无评论

Interface Engineering to Optimize Polarization and Optical Absorption of Bfmo/Bco Ferroelectric composite Films for for Optoelectronic Devices

SSRN

引用

SSRN 2024年

作者： Yang, Song Wang, Jian-Wei Yang, Xun-Yong Yi, Ying-Fei Li, Zuo Xiong, Zu-Hong Cheng, Li-Hong Wang, Xu School of Science Guizhou University of Engineering Science Bijie551700 China Guizhou Province Key Laboratory of Electronic Functional Composite Materials Guizhou University Guiyang550025 China Chongqing Key Laboratory of Micro&Nano Structure Optoelectronics School of Physical Science and Technology Southwest University Chongqing400715 China

Herein, high-quality BiFe0.92Mn0.08O3/BiCrO3 composite films were obtained by a sol-gel process and a comprehensive investigation of the film growth, domain structure, multiferroic, and optical properties was provided. These novel BiFe0.92Mn0.08O3/BiCrO3 films exhibit excellent multiferroic characteristics, which can be used as an absorber layer in ferroelectric photovoltaic solar cells. Moreover, the BiCrO3-based interlayers can reduce leakage current density of BiFe0.92Mn0.08O3/BiCrO3 films, resulting in more efficient ferroelectric properties. The superexchange interaction between Fe and Cr is achieved at theBiFe0.92Mn0.08O3/BiCrO3 interface by the magnetic coupling between Fe3+ and Cr3+ ions through paramagnetic oxygen atoms, which enhances the ferromagnetic properties of the films. Amazingly, these polarized materials can be tuned to cover more portion of the solar spectrum as a noteworthy spectral red-shift towards the visible region was discovered. This phenomenon was correlated to an occurrence of ferromagnetism, revealing the significant impact of physical materials non central symmetry structure on their chemical behaviors. © 2024, The Authors. All rights reserved.

关键词： Energy gap

来源：评论

学校读者我要写书评

暂无评论

Low-temperature(NO + O_(2)) adsorption performance of alkaline earth metal-doped C-FDU-15

引用

Journal of Environmental sciences 2021年第5期33卷 172-184页

作者： Runping Wu Qing Ye Kai Wu Hongxing Dai Key Laboratory of Beijing on Regional Air Pollution Control Department of Environmental ScienceCollege of Environmental and Energy EngineeringBeijing University of TechnologyBeijing 100124China Beijing Key Laboratory for Green Catalysis and Separation Key Laboratory of Beijing on Regional Air Pollution ControlKey Laboratory of Advanced Functional MaterialsEducation Ministry of Chinaand Laboratory of Catalysis Chemistry and NanoscienceDepartment of Chemistry and Chemical EngineeringCollege of Environmental and Energy EngineeringBeijing University of TechnologyBeijing 100124China

To improve the removal capacity of NO + O_(2) effectively, the alkaline earth metal-doped order mesoporous carbon(A-C-FDU-15(0.001)(A = Mg, Ca, Sr and Ba)) and Mg-C-FDU-15( x)( x = 0.001-0.003) samples were prepared, and their physicochemical and NO + O_(2) adsorption properties were determined by means of various techniques. The results show that the sequence in(NO + O_(2)) adsorption performance was as follows: Mg-C-FDU-15(0.001)(93.2 mg/g) > Ca-C-FDU-15(0.001)(82.2 mg/g) > Sr-C-FDU-15(0.001)(76.1 mg/g) > Ba-C-FDU-15(0.001)(72.9 mg/g) > C-FDU-15(67.1 mg/g). Among all of the A-C-FDU-15(0.001) samples, Mg-C-FDU-15(0.001) possessed the highest(NO + O_(2)) adsorption capacity(106.2 mg/g). The species of alkaline earth metals and basic sites were important factors determining the adsorption of NO + O_(2) on the A-C-FDU-15( x) samples, and(NO + O_(2)) adsorption on the samples was mainly chemical adsorption. Combined with the results of(NO + O_(2))-temperatureprogrammed desorption((NO + O_(2))-TPD) and in situ diffused reflectance infrared Fourier transform spectroscopy(DRIFTS) characterization, we deduced that there were two main pathways of(NO + O_(2)) adsorption: one was first the conversion of NO and O_(2) to NO_(2) and then part of NO_(2) was converted to NO_(2)^(-) and NO_(3)^(-);and the other was the direct oxidation of NO to NO-2 and NO_(3)^(-).

关键词： C-FDU-15 Alkaline earth metal NO+O_(2)adsorption Adsorption mechanism Adsorption kinetics

来源：评论

学校读者我要写书评

暂无评论

Supramolecular self-assembled graphitic carbon nitride catalyst: A comprehensive review on design principle, synthesis strategy, functionalization and application

引用

Nano Materials science 2024年

作者： Yang, Hao Sun, Shaodong Yang, Qing Cui, Jie Engineering Research Center of Conducting Materials and Composite Technology Ministry of Education Shaanxi Engineering Research Center of Metal-Based Heterogeneous Materials and Advanced Manufacturing Technology Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology School of Materials Science and Engineering Xi'an University of Technology Xi'an710048 China

Graphitic carbon nitride (g-CN) stands out as the most promising candidate for solar energy conversion owing to its easy preparation, metal-free nature, flexible molecular structure, moderate bandgap, and excellent thermal/chemical stability. To enhance the performance of intrinsic g-CN, a supramolecular self-assembly strategy has been proposed to regulate the molecular structure of supramolecular precursors through non-covalent interactions across molecular building blocks, thereby optimizing the electronic structure of g-CN. This review provides a comprehensive overview of the recent progress in supramolecular self-assembly-derived graphitic carbon nitride (SM-CN) from both experimental and theoretical computational research in synthesis strategies, including synthesis methods and influencing factors, providing a theoretical foundation for the design of supramolecular assembly. It also discusses modification strategies, such as internal modification of the conjugated plane, interlayer optimization, and construction of heterointerfaces to improve the electronic structure of SM-CN owing to its unique layered structure. This review further summarizes the applications of SM-CN in environment and energy, including wastewater treatment, sterilization and disinfection/air purification, water splitting, H2O2 production, organic synthesis/biomass conversion, CO2 reduction, photocatalytic coupling technology. Finally, perspectives and outlooks for the future development of SM-CN aim to inspire further innovation in the design and construction of high-performance SM-CN for broader applications. © 2024 Chongqing University

关键词： Wastewater treatment

来源：评论

学校读者我要写书评

暂无评论

Preparation of Alum-borneol-PVP Drug-loaded Fibers by Electrospinning

引用

Chemical Research in Chinese Universities 2021年第3期37卷 411-418页

作者： HUANG Libing LIU Yueqi SANG Xinyu SONG Jinghui HU Ping LIU Yong College of Mechanical and Electric Engineering Beijing University of Chemical TechnologyBeijing100029P.R.China Beijing Key Laboratory of Advanced Functional Polymer Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing100029P.R.China

The alum-borneol nanoemulsion(ABN),which combines the mineral medicine alum and the botanical medicine borneol,has been applied for approximately 40 years in the clinical treatment of burns,scalds,radiation dermatitis and shingles,and has a good curative ***,the current formula and dosage form of ABN pose problems of low borneol content and ease of precipitation,which greatly affects the efficacy of the *** this study,polyvinylpyrrolidone(PVP)was selected as a carrier mixed with different proportions of alum and borneol to produce alum-borneol-PVP fibers(ABPF)by *** results showed that the stable system with good drug dispersion was 2:3(alum:borneol).The dissolution content of borneol from the ABPF was about 80%in 4 h,which was much higher than that of the alum-borneol liquid(ABL)and *** ABPF membrane showed a more significant inhibitory effect on Staphylococcus aureus than the ABL and *** composite fiber markedly increased the drug content of borneol,which was 800 times of that in *** fiber had a higher solubility than the nanoemulsion in vitro,which is of great importance for the development of new forms for the clinical application of alum and borneol.

关键词： Drug delivery Dissolution content Bioavailability Antibacterial Fiber membrane

来源：评论

学校读者我要写书评

暂无评论

Mechanism insight into twin-dependent photocatalysis in near-infrared light-responsive Cu2O nanocrystals with rich oxygen vacancies

引用

Nano Materials science 2024年

作者： Zhang, Xiaochuan Sun, Shaodong Wang, Haotian Lyu, Jieli Yu, Xiaojing Yang, Bian Yang, Man Duan, Zongfan Yang, Qing Cui, Jie Engineering Research Center of Conducting Materials and Composite Technology Ministry of Education Shaanxi Engineering Research Center of Metal-Based Heterogeneous Materials and Advanced Manufacturing Technology Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology School of Materials Science and Engineering Xi'an University of Technology Xi'an710048 China

Simultaneous integration of rich oxygen vacancies (OVs) and twin crystals in a photocatalyst can not only significantly enhance the near-infrared (NIR) light response but also greatly improve the photocharge separation and transfer efficiency owing to the induced high electrical conductivity and strong built-in electric field. However, thus far, there has been a lack of a model catalyst containing both twin crystals and OVs. Herein, we develop a simple wet chemical strategy for synthesizing of unprecedented NIR light-responsive OVs-rich Cu2O black nanoparticles with high-density of twin crystals (denoted as black twinned Cu2O). As expected, the black twinned Cu2O exhibits higher visible-NIR and NIR light-driven photodegradation of tetracycline (TC) solution than the counterparts. Significantly, the mechanism insight into twin-dependent photocatalysis in NIR light-responsive Cu2O black nanocrystals with rich OVs is uncovered in depth by density functional theory (DFT) calculations and a series of experimental evidence. Expectantly, this work would be beneficial for the scientific researchers currently focusing on the NIR light-responsive photocatalysis and twin engineering of photocatalysts. © 2024 Chongqing University

关键词： Oxygen vacancies

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：