检索结果-内蒙古大学图书馆

The enhanced photocatalytic sterilization of MOF-Based nanohybrid for rapid and portable therapy of bacteria-infected open wounds

引用

Bioactive Materials 2022年第7期7卷 200-211页

作者： Chaofeng Wang Yue Luo Xiangmei Liu Zhenduo Cui Yufeng Zheng Yanqin Liang Zhaoyang Li Shengli Zhu Jie Lei Xiaobo Feng Shuilin Wu Biomedical Materials Engineering Research Center Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and MinistryHubei Key Laboratory of Polymer MaterialsMinistry-of-Education Key Laboratory for the Green Preparation and Application of Functional MaterialsSchool of Materials Science&EngineeringHubei UniversityWuhan 430062China School of Life Science and Health Engineering Hebei University of TechnologyXiping Avenue 5340Beichen DistrictTianjin 300401China School of Materials Science&Engineering The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of ChinaTianjin UniversityTianjin 300072PR China School of Materials Science&Engineering State Key Laboratory for Turbulence and Complex SystemPeking UniversityBeijing 100871China Department of Orthopaedics Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022PR China

Open wounds are prone to infection and difficult to heal,which even threatens the life of patients because bacterial infections can induce other lethal complications without prompt *** commonly used antibiotics treatment for bacterial infections has been reported to cause globally bacterial resistance and even the occurrence of *** highly effective and antibiotic-independent therapeutic strategies are urgently needed for treating various kinds of bacteria-infected *** this work,we synthesized an eco-friendly nanohybrid material(ZnDMZ)consisting of a kind of biodegradable metal organic framework(MOF,ZIF-8)combined with Zn-doped MoS_(2)(Zn-MoS_(2))nanosheets,which exhibited great ability to kill bacteria and promote the healing of bacteria-infected wounds under 660 nm light *** underlying mechanism is that besides the local hyperthermia,the nanohybrid material exhibits enhanced photocatalytic performance than single component in it,i.e.,it can also be excited by 660 nm light to produce more oxygen radical species(ROS)due to the following *** one hand,the Zn doping can reduce the work function and the band gap of MoS_(2),which promotes the movement of photoexcited electrons to the surface of the *** the other hand,the combination between Zn-MoS_(2) and MOF induces the formation of a built-in electric field due to their work function difference,thus accelerating the separation of photoexcited electron-hole *** of the synergy of photocatalytic effect,photothermal effect and the released Zn ions,the synthesized ZnDMZ possessed a highly effective antibacterial efficacy of 99.9%against Staphylococcus aureus under 660 nm light irradiation for 20 min without *** vivo tests showed that this nanohybrid material promoted the wound healing due to the released Zn *** nanohybrid will be promising for rapid and portable treatment of bacteria-infected open wounds in pathogenic bacteria contaminated

关键词： Antibacterial Wound healing Bacterial infection MOF Photocatalytic

来源：评论

学校读者我要写书评

暂无评论

A Mechanical Metamaterial with Polar Characteristics

SSRN

引用

SSRN 2023年

作者： Wang, Chao Huang, Zhixin Chen, Zihao Li, Ying School of Naval Architecture Ocean and Energy Power Engineering Wuhan University of Technology Wuhan430064 China State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology Beijing100081 China Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures Institute of Advanced Structure Technology Beijing Institute of Technology Beijing100081 China

Polarity refers to the phenomenon of an object exhibiting opposite intrinsic properties in opposing directions, which plays a fundamental role in various fields including mechanical diodes, mechanical logic gates, and shock protection. This paper proposes a new mechanical metamaterial with polar and multistability characteristics based on a fishbone-like structure to enable a given surface structure to be hard while its opposite side is soft, while also enabling the task of adapting to different load levels on the soft side. The mechanical metamaterial displays double-stress platforms and exhibits a significant difference in mechanical response when loaded on opposite sides. Through numerical simulations, the polarity characteristic spectrum of the mechanical metamaterial is identified. The stress platform with a soft boundary predicted using Euler’s instability theory was verified through both numerical simulation and experimentation. The dimensionless parameters for load differences are defined to evaluate the polar characteristics of polar mechanical metamaterials, and design guidelines are provided for achieving significant polar characteristics of polar mechanical metamaterials by discussing the influence of geometrical parameters. The proposed polar mechanical metamaterial introduces a novel design concept applicable to signal transmission, isolation, and energy absorption for different load levels. © 2023, The Authors. All rights reserved.

关键词： Metamaterials

来源：评论

学校读者我要写书评

暂无评论

Realization of semimagnetic and magnetic topological insulators via topological surface states floating

引用

Physical Review B 2024年第15期109卷 155427-155427页

作者： Xuqi Li Huihui Zhang Hong Xu Haidan Sang Xiaonan Wang Shifei Qi Zhenhua Qiao College of Physics and Hebei Advanced Thin Film Laboratory Hebei Normal University Shijiazhuang Hebei 050024 China School of Chemistry and Materials Science Hebei Normal University Shijiazhuang Hebei 050024 China International Centre for Quantum Design of Functional Materials CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics and Department of Physics University of Science and Technology of China Hefei Anhui 230026 China Hefei National Laboratory University of Science and Technology of China Hefei 230088 China

The observation temperatures of quantum anomalous Hall effect in semimagnetic and magnetic topological insulator (MTI) heterostructures are always much lower than Curie temperature. Here, we theoretically demonstrate that floating of topological surface states (TSSs) into magnetic insulators is not only able to produce ideal semi-MTI heterostructures, but also provides insight into the origin of extremely low observation temperature of the quantum anomalous Hall effect in different MTIs. We show that the emergence of diving and floating of TSSs can be observed in MnBi2Te4/Bi2Se3 family heterostructures. Within the TSSs floating systems, MnBi2Te4/Sb2Te3 and NiBi2Te4/Sb2Te3 exhibit characteristics of ideal semi-MTIs, featuring a tunable Fermi level, and MnSb2Te4/Bi2Te3/NiBi2Te4 (NiBi2Te4/Sb2Te3/VBi2Te4) is found to be MTI with weak (strong) long-range ferromagnetic coupling and large (small) surface gap. Our findings reveal that the observation temperature of quantum anomalous Hall effect is governed by the smaller of the two surface gaps, rather than being directly linked to the Curie temperature of MTIs.

关键词： First-principles calculations Topological insulators Topological materials

来源：评论

学校读者我要写书评

暂无评论

Two-dimensional non-van der Waals niobium nitride nanosheets with high-temperature two-gap superconductivity

arXiv

引用

arXiv 2025年

作者： Xiong, Si-Yi Jiang, Peng Wang, Yiming Li, Yan-Ling Laboratory for Quantum Design of Functional Materials School of Physics and Electronic Engineering Jiangsu Normal University Xuzhou221116 China Center for High Pressure Science and Technology Advanced Research Shanghai201203 China

The exploration of the superconductivity in two-dimensional materials has garnered significant attention due to their promising low-power applications and fundamental scientific interest. Here, we report some novel stable non-van der Waals NbxNx+1 (x = 1-4) monolayers derived from the NbN bulk exfoliated along the [001] direction, as identified through first-principles calculations. Among these monolayers, Nb2N3, which crystallizes in the P6m2 symmetry, stands out with an exceptional superconducting transition temperature of 77.8 K, setting a new high-Tc benchmark for two-dimensional transition metal nitrides and binary compounds. Our detailed analysis reveals that the strong superconductivity in Nb2N3 is driven by phonon modes dominated by N vibrations, with significant electron-phonon coupling contributions from N-p and Nb-d electronic states. Using the anisotropic Migdal-Eliashberg framework, we further determine the two-gap nature of the superconductivity in the Nb2N3 monolayer, characterized by pronounced electron-phonon coupling and anisotropic energy gaps. These results advance our understanding of superconductivity in two-dimensional transition metal nitride and highlight their potential for nanoscale superconducting applications. Copyright © 2025, The Authors. All rights reserved.

关键词： Nickel compounds

来源：评论

学校读者我要写书评

暂无评论

Hierarchical Ni_(3)S_(4)@MoS_(2)nanocomposites as efficient electrocatalysts for hydrogen evolution reaction

引用

Journal of Materials science & technology 2021年第36期95卷 70-77页

作者： Yuxi Ren Shengli Zhu Yanqin Liang Zhaoyang Li Shuilin Wu Chuntao Chang Shuiyuan Luo Zhenduo Cui School of Mechanical Engineering Dongguan University of TechnologyDongguan 523808China School of Materials Science and Engineering Tianjin UniversityTianjin 300350China Tianjin Key Laboratory of Composite and Functional Materials Tianjin 300350China School of Materials Science and Engineering Lanzhou Jiaotong UniversityLanzhou 730070China College of Chemistry Engineering and Materials Science Quanzhou Normal UniversityQuanzhou 362000China

Hydrogen evolution reaction(HER)through water splitting is a promising way to solve the energy ***-metal-free HER electrocatalysts with high efficiency is very important for practical ***,we prepare the Ni_(3)S_(4)@MoS_(2)electrocatalyst on carbon cloth(CC)through a two-step hydrothermal *** Ni_(3)S_(4)nanorods are uniformly integrated with the MoS_(2)nanosheets,forming a hierarchical structure and heterogeneous *** fast electron transfer on the interface enhances the kinetics of catalytic *** hierarchical structure provides more exposed active *** Ni_(3)S_(4)@MoS_(2)/CC exhibits good catalytic activity and long-term stability for *** work provided a practicable strategy to develop efficient electrocatalysts for HER in alkaline media.

关键词： Heterogeneous interfaces Hierarchical structure Metal sulfides Alkaline hydrogen evolution reaction

来源：评论

学校读者我要写书评

暂无评论

Deciphering the superior thermoelectric property of posttreatment-free PEDOT:PSS/IL hybrid by X-ray and neutron scattering characterization

引用

npj Flexible Electronics 2022年第1期6卷 53-60页

作者： Xin Li Ruike Zou Zhen Liu Jitendra Mata Ben Storer Yu Chen Weiheng Qi Zekun Zhou Peng Zhang State Key Laboratory of Optoelectronic Materials and Technologies Key Laboratory for Polymeric Composite and Functional Materials of Ministry of EducationSchool of Materials Science and EngineeringSun Yat-sen UniversityGuangzhou 510275China Australian Centre for Neutron Scattering Australian Nuclear Science and Technology OrganisationLucas HeightsNSW 2234Australia Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

In this work,a polymer and ionic liquid(IL)hybrid with superior thermoelectric performance is prepared via a system design of the chemical composition,molar ratio of the constituent molecules and manipulating the structure in solution and dried *** solution-casted hybrid film,consisting of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)and 1-ethyl-3-methylimidazolium tricyanomethanide(EMIM:TCM),shows the highest power factor of 175μW m^(−1) K^(−2) in the polymer hybrid prepared by a post-treatment-free *** a set of complementary structure characterization methods,it is found that EMIM:TCM can induce the structure reorganization of PEDOT:PSS in solution from a core-shell model to a rod-like model,during which PEDOT partially separates from PSS that eases the conductive network *** addition,the oxidation level of PEDOT:PSS is reduced by adding EMIM:*** on which,the PEDOT:PSS/IL hybrid shows the best performance in optimizing the conductivity(1163 S cm^(−1))and Seebeck coefficient(38.8μV K^(−1))simultaneously.

关键词： characterization property dried

来源：评论

学校读者我要写书评

暂无评论

Preparation of Three-Dimensional Carbon Network Reinforced Epoxy composites and Their Thermal Conductivity

引用

Transactions of Tianjin University 2020年第5期26卷 399-408页

作者： Jing Li Kai Song Hetong Zhang Yue Guo Fang He Naiqin Zhao Chunsheng Shi Tianjin Key Laboratory of Composite and Functional Materials School of Materials Science and EngineeringTianjin UniversityTianjin 300072China Key Laboratory of Advanced Ceramics and Machining Technology Ministry of EducationTianjin UniversityTianjin 300072China

As a thermosetting resin with excellent properties,epoxy resin is used in many areas such as electronics,transportation,aerospace,and other ***,its relatively low thermal conductivity limits its wide application in more demanding ***,a three-dimensional carbon(3DC)network was prepared through NaCl template-assisted in situ chemical vapor deposition(CVD)and used to reinforce epoxy resin for enhancing its thermal *** 3DC was prepared with a molar ratio of sodium atom to carbon atom of 100:20,and argon atmosphere in CVD led to an optimal improvement in the thermal conductivity of epoxy *** thermal conductivity of epoxy resin increased by 18%when the filling content was 3 wt.%of 3DC network because of the high contact area,uniform dispersion,and enhanced formation of conductive paths with epoxy *** the amount of 3DC addition increases,the thermal conductivity of composites also *** an innovative exploration,the work presented in this paper is of great significance for the thermal conductivity application of epoxy resin in the future.

关键词： Three-dimensional carbon NaCl template Epoxy resin composites Thermal conductivity

来源：评论

学校读者我要写书评

暂无评论

Surface Oxygen Vacancy and Hydride Species on Ceria Are Detrimental to Acetylene Semihydrogenation Reaction

引用

ACS Catalysis 2023年第8期13卷 5213-5224页

作者： Li, Zhaorui Chen, Lu Wu, Zongfang Jia, AiPing Shi, Shucheng Zhang, Hui Wang, Jia Liu, Zhi Shao, Wei-Peng Yang, Fan Wu, Xin-Ping Gong, Xue-Qing Huang, Weixin Key Laboratory of Precise and Intelligent Chemistry iChEM Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes Department of Chemical Physics University of Science and Technology of China Hefei 230026 China Key Laboratory for Advanced Materials and Joint International Research Laboratory for Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research Center Centre for Computational Chemistry and Research Institute of Industrial Catalysis School of Chemistry and Molecular Engineering East China University of Science and Technology Shanghai 200237 China Hefei National Research Center for Physical Science at the Microscale Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes University of Science and Technology of China Hefei 230026 China Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Institute of Physical Chemistry Zhejiang Normal University Jinhua 321004 China School of Physical Science and Technology Shanghai Tech University Shanghai 201210 China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China Dalian National Laboratory for Clean Energy Chinese Academy of Sciences Dalian 116023 China

Reactivity of OH and hydride species in oxide-catalyzed hydrogenation reactions has attracted great interest. Herein, we report a combined in situ spectroscopic characterization and density functional theory (DFT) calculation study of ceria-catalyzed acetylene semihydrogenation reaction. The ceria surface is fully hydroxylated during the adopted reaction condition. C₂H₂ adsorbs molecularly on the stoichiometric CeO₂ surface and hydrogenates with OH groups selectively to produce C₂H₄. Semihydrogenation of C₂H₂ to C₂H₄ with either OH groups or hydride species on ceria surfaces with surface oxygen vacancies proceeds more facilely than on a stoichiometric CeO₂ surface, but C₂H₄ adsorbs more strongly and further hydrogenates to C₂H₆ more facilely;moreover, dissociative adsorption of C₂H₂ to C₂H species occurs, which facilely hydrogenates with the hydride species eventually to form C₂H₆ and react with each other to produce oligomers, decreasing the catalytic selectivity and stability, respectively. These results demonstrate that the ceria catalyst with a stoichiometric surface is extremely selective in catalyzing C₂H₂ semihydrogenation reaction to C₂H₄, whereas surface oxygen vacancies or hydride species on ceria are harmful to the catalytic performance. © 2023 American Chemical Society.

关键词： active species DFT calculations heterogeneous catalysis in situ characterization reaction mechanism

来源：评论

学校读者我要写书评

暂无评论

Microstructure and magnetic properties of SmCo_(5) sintered magnets

引用

Rare Metals 2020年第11期39卷 1295-1299页

作者： Dong-Tao Zhang Rong-Chun Zhu Ming Yue Wei-Qiang Liu College of Materials Science and Engineering Key Laboratory of Advanced Functional MaterialsMinistry of Education of ChinaBeijing University of TechnologyBeijing 100124China

SmCo_(5)sintered magnets with good thermal stability are mainly used in high-temperature *** this study,two types of SmCo_(5) powders with different nominal z values were mixed and synthesized into SmCo_(5) magnets by the traditional powder metallurgy *** magnetic properties of the SmCo_(5) sintered magnet are maximum energy product of(BH)_(max)=172.29 kJ·m^(-3),remanence of B_(r)=7.47×10^(5)A·m^(-1)and coercivity of H_(ci)=2.42 *** results show that there are three coexisting phases in the magnet,which are SmCo_(5)phase,Sm_(2)Co_(7)phase and Sm_(2)O_(3)*** microstructural observation indicates that the average grain size in the magnet is about 8μm,and the high coercivity of this magnet is attributed to these fine grains.X-ray diffraction(XRD)and electron backscatter diffraction(EBSD)results indicate that the magnet has a well-aligned(00l)orientation texture.

关键词： SmCo_(5) Sintered magnets Magnetic properties

来源：评论

学校读者我要写书评

暂无评论

Interface-engineered MoS_(2)/CoS/NF bifunctional catalysts for highly-efficient water electrolysis

引用

Journal of Energy Chemistry 2022年第12期75卷 16-25,I0002页

作者： Wenxia Chen Xingwang Zhu Rui Wang Wei Wei Meng Liu Shuai Dong Kostya Ken Ostrikov Shuang-Quan Zang School of Chemistry and Chemical Engineering Henan Key Laboratory of Biomolecular Recognition and SensingHenan D&A Engineering Center of Advanced Battery MaterialsShangqiu Normal UniversityShangqiu 476000HenanChina Henan Key Laboratory of Crystalline Molecular Functional Materials Henan International Joint Laboratory of Tumor Theranostical Cluster MaterialsGreen Catalysis Center and College of ChemistryZhengzhou UniversityZhengzhou 450001HenanChina College of Environmental Science and Engineering Yangzhou UniversityYangzhou 225009JiangsuChina School of Chemistry and Physics and Centre for Materials Science Queensland University of Technology(QUT)BrisbaneQLD 4000Australia

The utilization of non-noble metal catalysts with robust and highly efficient electrocatalytic activity for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)are extremely important for the large-scale implementation of renewable energy *** of bifunctional electrocatalysts on both anode and cathode electrodes remains a significant ***,we report on a novel and facile strategy to construct the ordered and aligned MoS_(2)nanosheet-encapsulated metal–organic frameworks(MOFs)derived hollow CoS polyhedron,in-situ grown on a nickel foam(NF).The starfish-like MoS_(2)/CoS/NF heterojunctions were formed due to the ordered growth of the material caused by NF *** optimized 2-MoS_(2)/CoS/NF heterojunction exhibits robust bifunctional electrocatalytic activity with a low overpotential of 67 and 207 m V toward the HER and OER at 10 mA cm^(-2),and the long-term stability,which exceeds most of the reported bifunctional *** high electrocatalytic performance arises due to the synergistic effect between the MoS_(2)and CoS phases across the interface,the abundant active sites,as well as the hierarchical pore framework,which collectively enhance the mass and electron transfer during the *** work provides a promising approach to fabricating bifunctional catalysts with custom-designed heterojunctions and remarkable performance for applications in electrochemical energy devices and related areas.

关键词： Heterojunction Bifunctional catalysts HER OER

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：