检索结果-内蒙古大学图书馆

Guanine-derived F,N co-doped carbon-shell encapsulated iron carbide nanoparticles for enhanced CO_(2)electroreduction activity

引用

Nano Research 2024年第6期17卷 4744-4752页

作者： Shuo Chen Lishun Pei Ying Peng Xuefei Zhang Zailai Xie Key Laboratory of Advanced Carbon-Based Functional Materials(Fujian Province University) Fuzhou UniversityFuzhou 350016China

The development of highly selective,cost-effective,and energy-efficient electrocatalysts is critical for carbon dioxide reduction reaction(CO_(2)RR)to produce high-value ***,we propose a facile strategy to obtain F,N co-doped carbon-coated iron carbide(Fe3C)nanoparticles by using biomolecule guanine and hexadecafluorophthalocyanine iron as raw ***,this method involves only one-step pyrolysis and does not require any guiding agent or sacrificial *** from the advantageous surface microenvironment adjustments achieved through graphitic N(GN)and F co-doping,Fe3C@NF-G-1000 demonstrates exceptional efficacy in the electroreduction of CO_(2)to carbon monoxide(CO)with an impressive Faradic efficiency(FEco)up to 98%at the potential of−0.55 V(*** hydrogen electrode(RHE)).Furthermore,it delivers a remarkable current density of up to−43 mA·cm^(−2)and exhibits virtually no current attenuation over a span of 20 h within the flow *** from density functional theory(DFT)calculations reveal that the composite structure of GN and F co-doped graphitic layer and Fe3C exhibits different electron density distributions from that of iron carbide *** is attributed to the synergistic effect of the composite structure leading to the enrichment of electrons in the graphite layer on the surface,which contributes to the stability of the key reaction intermediate*COOH,thus,resulting in an enhanced catalytic activity and ***,this work introduces a new and promising approach to the design of green and low-cost carbon-coated metal materials for CO_(2)reduction reactions.

关键词： guanine F,N co-doped carbon dioxide reduction reaction(CO_(2)RR) Fe-based catalyst

来源：评论

学校读者我要写书评

暂无评论

Time-dependent color-tunable room temperature phosphorescence from unusual conformational transitions in phenothiazine polymers under UV irradiation

引用

Science China Chemistry 2025年第3期68卷 1091-1098页

作者： Jiwen Lu Yifan Niu Chanjuan Jin Chengheng Wu Hanyu Wang Yan Guan Ping Wang Xinghe Fan Key Lab of Environment-Friendly Chemistry and Application of Ministry of Education Key Laboratory of Polymeric Materials and Application Technology of Hunan ProvinceKey Laboratory of Advanced Functional Polymer Materials of CollegesUniversities of Hunan ProvinceCollege of ChemistryXiangtan UniversityXiangtan 411105China Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationCenter for Soft Matter Science and EngineeringCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

Achieving color-tunable room-temperature phosphorescence(RTP),especially including blue RTP from a single-component polymer still faces a formidable ***,we wisely choose conformation-dependent phenothiazine with trifluoromethyl substituent as the side group of the phosphor monomer(Cz PT)and then copolymerize it with N-isopropylacrylamide(NIPAM)through photopolymerization to obtain polymers PPCz ***-dependent color-tunable phosphorescence from unusual quasi-equatorial(eq)to quasi-axial(ax)conformers are obtained,and the RTP color changes from orange(550 nm)to blue(470 nm)with phosphorescence lifetime up to 0.96 *** theoretical calculations confirm that the quasi-axial conformer is the preferred structure that facilitates the formation of intramolecular hydrogen bonds on the trifluoromethyl *** EPR spectra illustrate that the persistent UV irradiation generates radical cations to induce the conformational transitions first,followed by photopolymerization immobilizing the ax conformation in PPCz *** of data encryption and anti-counterfeiting are fabricated to show prompt and delayed multicolor *** work affords a simple and feasible avenue for two-dimensional color tunable room temperature phosphorescence from a single-component polymer.

关键词： polymeric room temperature phosphorescence color-tunable phosphorescence conformation-dependent time-dependent blue phosphorescence

来源：评论

学校读者我要写书评

暂无评论

Programmable and reconfigurable humidity-driven actuators made with MXene(Ti_(3)C_(2)T_(x))-cellulose nanofiber composites for biomimetic applications

引用

Nano Research 2024年第7期17卷 6619-6629页

作者： Shaofeng Zeng Yuanji Ye Peidi Zhou Shimin Yi Qiaohang Guo Huamin Chen Guozhen Shen Mingcen Weng School of Mechanical and Automotive Engineering Fujian University of TechnologyFuzhou 350118China School of Materials Science and Engineering Fujian Provincial Key Laboratory of Advanced Materials Processing and ApplicationKey Laboratory of Polymer Materials and Products of Universities in FujianFujian University of TechnologyFuzhou 350118China Institute of Smart Marine and Engineering Fujian University of TechnologyFuzhou 350118China Fujian Key Laboratory of Functional Marine Sensing Materials College of Materials and Chemical EngineeringMinjiang UniversityFuzhou 350108China School of Integrated Circuits and Electronics Beijing Institute of TechnologyBeijing 100081China

Smart actuators have a wide range of applications in bionics and energy *** ability to reconfigure shape is essential for soft actuators to achieve various shapes and deformations,which is a crucial feature for next-generation ***,it is still an enormous challenge to establish a straightforward approach to creating programmable and reconfigurable ***-cellulose nanofiber composite film(MCCF)with a brick-and-mortar hierarchical structure was produced through a vacuum filtration *** demonstrates impressive mechanical properties such as a tensile stress of 68 MPa and a Young’s modulus of 4.65 ***,the MCCF highlights its potential for water-assisted shaping/welding due to the abundance of hydrogen bonds between MXene and cellulose *** also showcases capabilities as a humiditydriven actuator with a rapid response rate of 550°·s^(−1).Using the methods of water-assisted shaping/welding,several bionic actuators(such as flower,butterfly,and muscle)based on MCCF were designed,highlighting their versatility in applications of smart *** research showcases the impressive capabilities of MXene-based actuators and offers beneficial insights for the advancement of future intelligent materials.

关键词： MXene cellulose nanofibers programmable actuators humidity-driven

来源：评论

学校读者我要写书评

暂无评论

Microstructures, mechanical and corrosion performance of TiC/Al composites subjected to compression with torsion

引用

Ceramics International 2025年第15期51卷 21037-21047页

作者： Wu, Chenchen Zhu, Maolan Wang, Weikun Sun, Jingjing Chen, Ying Key Laboratory of Functional Materials and Applications of Fujian Province Xiamen University of Technology Xiamen361024 China School of Materials Science and Engineering Shanghai University Shanghai200444 China

This work reveals how TiC ceramic phase affects the mechanical properties and the corrosion performance of TiC/Al composites under compression with torsion (CT). Samples were processed by CT through 1, 5 and 10 turns under a pressure of 400 MPa. The dislocation density and crystallite size were calculated by full-peak fitting of X-ray diffraction patterns, and the microstructures were characterized by transmission electron microscopy. The dislocation density of the TiC/Al composites after 10 turns of torsional rotation approached 3.1 × 1014 m−2, which was 1.5 times that of the original 7075 Al alloy (2.0 × 1014 m−2). After rotating for 10 turns, the TiC/Al composite had the highest hardness of 167.2 HV in the disc edge region, which was 37 % higher than the initial hardness. TiC ceramic particles provided more nucleation sites for η phase and promoted dislocation proliferation, leading to the extra increase of hardness. The corrosion depth of TiC/Al composites were deeper (185 μm) than the 7075 Al alloy (178 μm), but both samples exhibited a similar corrosion depth of 225 μm after 10 torsional rotations. © 2025

关键词： Aluminum corrosion

来源：评论

学校读者我要写书评

暂无评论

Protective layer for stable lithium-metal anodes at 60 mA·h/cm^(2) and 60 mA/cm^(2) with ion channel and inductive effect

引用

Journal of Materiomics 2024年第6期10卷 1252-1260页

作者： Xiao Zhang Zhiwei Chen Jiaojiao Han Qiang Wang Jinshan Wang Juhua Luo Jianguang Xu Chi Chen Wei Yao School of Materials Science and Engineering Jiangsu Provincial Key Laboratory of Eco-Environmental MaterialsYancheng Institute of TechnologyYancheng 224051China School of Materials and Energy Shanghai Key Laboratory of Engineering Materials Application and EvaluationShanghai Polytechnic UniversityShanghai 201209China CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials and Xiamen Institute of Rare Earth MaterialsHaixi InstituteChinese Academy of SciencesXiamen 361021China

Contradiction between ultrafast nucleation and deposition rates of lithium(Li)crystals at high rate and heterogeneity of Li^(+)flux resulting from concentration polarization has compromised the performance of Li metal anodes especially at high areal capacity and current ***,multifunctional protective layer consisting of MoO_(3) nanobelt films(MoO_(3)-NF)is introduced on the surface of Li by a simple rolling *** strong binding energy between Li and MoO_(3) guides the homogeneous nucleation and deposition of Li,while the nanobelt networks provide effective ion channels for uniform distribution of the Li+*** of the novel multifunctional protective layer,the MoO_(3)-NF@Li anodes demonstrate a remarkable stability for 800 h with ultralow overpotential of 159 mV at extreme harsh conditions of 60 mA·h/cm^(2) and 60 mA/cm^(2).MoO_(3)-NF@Li||LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2) full-cells can run 100 cycles with a superior capacity retention of 84.2%under practical test conditions,demonstrating great potential for high output and energy-density metal batteries.

关键词： Multifunctional protective layer Ion channel Inductive effect High areal capacity Li metal anodes

来源：评论

学校读者我要写书评

暂无评论

A universal strategy for achieving dual cross-linked networks to obtain ultralong polymeric room temperature phosphorescence

引用

Science China Chemistry 2023年第4期66卷 1161-1168页

作者： Yifan Niu Yan Guan Chunye Long Chaofan Ren Jiwen Lu Chanjuan Jin Ping Wang Xinghe Fan He-Lou Xie Key Laboratory of Environment-friendly Chemistry and Application of Ministry of Education Key Laboratory of Polymeric Materials and Application Technology of Hunan Province and Key Laboratory of Advanced Functional Polymer Materials of Colleges and Universities of Hunan ProvinceCollege of ChemistryXiangtan UniversityXiangtan 411105China Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationCenter for Soft Matter Science and EngineeringCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

Efficient polymeric room-temperature phosphorescence(PRTP)with excellent processability and flexibility is highly desirable but still faces formidable ***,a general strategy is developed for efficient PRTP through photo-polymerization of phosphor monomers and N-isopropylacrylamide(NIPAM)spontaneously without a *** ultralong lifetime of 3.54 s with afterglow duration time of 25 s and decent phosphorescent quantum efficiency of 13%are *** efficient PRTP has been demonstrated to be derived from the synergistic effect of the covalent and hydrogen bonds networks formed through photo-polymerization of *** electron paramagnetic resonance(EPR)spectra confirmed that methyl radicals are generated under the irradiation of ultraviolet light and promote the formation of covalent cross-linking *** strategy has also been proved to be generalizable to several other phosphor ***,the polymer films display ultrahigh temperature resistance with long afterglows even at 140℃ and unexampled ultralong lifetime of 2.45 s in aqueous *** work provides a simple and feasible avenue to obtain efficient PRTP.

关键词： universal strategy ultralong polymeric room temperature phosphorescence dual cross-linked networks photopolymerization crosslinker

来源：评论

学校读者我要写书评

暂无评论

Producing circularly polarized luminescence by radiative energy transfer from achiral metal-organic cage to chiral organic molecules

引用

Chinese Chemical Letters 2024年第8期35卷 498-502页

作者： Zhao-Xia Lian Xue-Zhi Wang Chuang-Wei Zhou Jiayu Li Ming-De Li Xiao-Ping Zhou Dan Li College of Chemistry and Materials Science Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and ApplicationsJinan UniversityGuangzhou 510632China College of Chemistry and Chemical Engineering Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong ProvinceShantou UniversityShantou 515063China

The development of circularly polarized luminescence(CPL)materials with high performance is signifi-cantly ***,we develop a facial strategy for fabricating a CPL-active system by employing an achiral luminescent metal-organic cage(MOC)and chiral boron dipyrromethene(BODIPY)*** is achieved by taking advantage of the radiative energy transfer process,in which BODIPY molecules act as energy acceptors and MOCs act as *** CPL performance(maximum luminescence dissymme-try factor up to±1.5×10^(−3))can be tuned by adjusting the ratio between MOCs and ***-light emission with the CPL feature is obtained by using a ternary system including MOC,chiral BODIPY,and Rhodamine *** present work provides a facile and universal strategy to construct a CPL-active system by integrating achiral luminophores and chiral molecules.

关键词： Circularly polarized luminescence Metal-organic cage Radiative energy transfer Chiral small molecules Bodipy Chirality

来源：评论

学校读者我要写书评

暂无评论

Effect of mono-/divalent metal ions on the conductivity characteristics of DNA solutions transferring through a microfluidic channel

引用

Chinese Physics B 2023年第11期32卷 161-167页

作者：朱洁薛菁赵伟张琛冯晓强王凯歌 State Key Laboratory of Cultivation Base for Photoelectric Technology and Functional Materials Key Laboratory of Optoelectronic Technology of Shaanxi ProvinceNational Center for International Research of Photoelectric Technology&Nano-functional Materials and ApplicationInstitute of Photonics and Photon-TechnologyNorthwest UniversityXi’an 710069China

Interactions between deoxyribonucleic acid(DNA) and metal ions are vital for maintaining life functions, however,there are still unsolved questions about its mechanisms. It is of great practical significance to study these issues for medical chip design, drug development, health care, etc. In this investigation, the conductivity properties of λ-DNA solutions with mono-/divalent metal ions(Na+, K^(+), Mg^(2+), and Ca^(2+)) are experimentally studied as they are electrically driven through a 5 μm microfluidic channel. Experimental data indicate that the conductivities of λ-DNA solutions with metal ions(M+/M2+) basically tend to reduce firstly and then increase as the voltage increases, of which the turning points varied with the metal ions. When the voltage surpasses turning points, the conductivity of λ-DNA-M+solutions increases with the concentration of metal ions, while that of λ-DNA-M^(2+)solutions decrease. Moreover, the conductivity of λ-DNA-M^(2+)solutions is always smaller than that of λ-DNA-M+solutions, and with high-concentration M^(2+), it is even smaller than that of the λ-DNA solution. The main reasons for the above findings could be attributed to the polarization of electrodes and different mechanisms of interactions between metal ions and λ-DNA molecules. This investigation is helpful for the precise manipulation of single DNA molecules in micro-/nanofluidic space and the design of new biomedical micro-/nanofluidic sensors.

关键词： microfluidics interaction between deoxyribonucleic acid(DNA)and metal ions conductivity-voltage relations asymmetric electrodes

来源：评论

学校读者我要写书评

暂无评论

A CuO/TiO_(2)Heterojunction Based CO Sensor with High Response and Selectivity

引用

Energy & Environmental materials 2023年第3期6卷 409-416页

作者： Wei Wei Huanhuan Zhang Tiyue Tao Xiaohong Xia Yuwen Bao Manon Lourenco Kevin Homewood Zhongbing Huang Yun Gao Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and MinistrySchool of Materials Science&EngineeringHubei UniversityWuhan 430062China

The use of heterojunctions is a promising solution to the problem of cross-sensitivity in gas *** this work,a carbon monoxide sensor based on the CuO/TiO_(2)heterojunction was designed and *** to the good adsorption properties of CuO materials to CO,and the heterojunction interface charge transfer,the CuO/TiO_(2)thin film sensor exhibits high sensitivity to CO at room *** response is as high as 10.8–200 ppm CO,about 10 times its response to H_(2).Interference from H_(2)is greatly reduced by optimizing the structure of the CuO/TiO_(2)*** reliable detection of carbon monoxide with excellent discrimination against H_(2)is of great significance for the development of CO gas sensors.

关键词： carbon monoxide cross-sensitivity gas sensor heterojunction hydrogen

来源：评论

学校读者我要写书评

暂无评论

Synergetic Contributions from the Components of Flexible 3D Structured C/Ag/ZnO/CC Anode materials for Lithium-Ion Batteries

引用

Energy & Environmental materials 2023年第6期6卷 227-235页

作者： Huang Xiao Shuangpeng Li Jiaying Zhou Chenyu Zhao Yi Yuan Xiaohong Xia Yuwen Bao Manon Lourenço Kevin Homewood Yun Gao Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and MinistrySchool of Materials Science&EngineeringHubei UniversityWuhan 430062China

Low electronic conductivity and large volume changes during the(de)lithiation process are the two main challenges for ZnO anode materials used for lithium-ion batteries(LIB).Here,a free-standing,flexible,and binder-free LIB electrode composed of ZnO nanorods and carbon cloth(CC)is *** is then decorated with Ag nanoparticles and finally coated by an amorphous carbon layer to form the hybrid electrode:(C@(Ag&ZnO)).The voids among the nanorods are sufficient to accommodate the volume expansion of the ZnO while the flexible CC,which acts as the current collector,relieves the volume change-induced *** Ag nanoparticles are effective in improving the *** composite electrode shows excellent LIB performance with a stable long cycling life over 500 cycles with a reversible capacity of 1093 mAh g^(-1)at a current density of 200 mA g^(-1).It also shows good rate performance with reversible capacity of 517 mAh g^(-1)under a high-current density of 5000 mA g^(-1).In situ Raman spectroscopy is conducted to investigate the contributions of the amorphous carbon layer to the capacity of the whole electrode and the synergy between the CC and ZnO nanorods.

关键词： binder-free in situ Raman spectroscopy lithium-ion batteries ZnO nanorods

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：