检索结果-内蒙古大学图书馆

Preparation of graphene-based active carbons from petroleum asphalt for high-performance supercapacitors without added conducting materials

引用

science China(Technological sciences) 2022年第12期65卷 2866-2873页

作者： WANG Bin XIE PengYi ZHANG Miao ZHANG HongTao CHEN YongSheng School of Physics and Materials Science Guangzhou UniversityGuangzhou 510006China School of Chemistry and Materials Science Guangdong University of EducationGuangzhou 510303China The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Institute of Polymer ChemistryCollege of ChemistryNankai UniversityTianjin 300071China Research Center for Advanced Information Materials(CAIM) Huangpu Research&Graduate School of Guangzhou UniversityGuangzhou 510555China

Graphene-based active carbons(G-ACs) with a high specific surface area and high conductivity are promising electrode materials for high-performance supercapacitors. Typically, however, syntheses of the G-ACs call for expensive raw materials and are cumbersome. Here, the G-ACs are obtained by direct chemical activation of petroleum asphalt. The highest specific surface area of the prepared G-ACs is 3505 m^(2)/g and the corresponding conductivity is 32 S/m. Electrodes fabricated using the as-prepared G-ACs, i.e., without any conductive additives, demonstrate high specific capacitance and high rate performance. The specific capacitances of optimized G-ACs, as measured in a 1 mol/L TEABF_(4)/AN electrolyte and the neat ionic liquid EMIMBF_(4), are 155 and 176 F/g at 1 A/g, providing the high energy density of 39.2 and 74.9 W h/kg, respectively. In addition,the G-ACs exhibited excellent rate capability with a negligible capacitance decay from 0.5 to 10 A/g in both 1 mol/L TEABF_(4)/AN and neat EMIMBF_(4) electrolytes. Furthermore, the optimized G-AC has a high energy density(68.5 W h/kg) at a relatively high power density(8501 W/kg), indicating that it holds potential for application in green energy storage.

关键词： supercapacitor asphalt porous carbon rate capability

来源：评论

学校读者我要写书评

暂无评论

Polycarcin V induces DNA-damage response and enables the profiling of DNA-binding proteins

引用

National science Review 2022年第11期9卷 19-28页

作者： Zongwei Yue Fan Wu Fusheng Guo Jiyeong Park Jin Wang Liyun Zhang Daohong Liao Wenyang Li Orlando D.Sch?rer Xiaoguang Lei Beijing National Laboratory for Molecular Sciences Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationDepartment of Chemical BiologyCollege of Chemistry and Molecular Engineering Synthetic and Functional Biomolecules CenterPeking University Peking-Tsinghua Center for Life Science Academy for Advanced Interdisciplinary Studies Peking University Center for Genomic Integrity Institute for Basic Science Jiangsu JITRI Molecular Engineering Inst.Co. Ltd. Department of Biological Sciences School of Life Sciences Ulsan National Institute of Science and Technology Institute for Cancer Research Shenzhen Bay Laboratory

To maintain genomic integrity and avoid diseases, the DNA-damage response(DDR) not only detects and repairs DNA lesions, but also contributes to the resistance to DNA-damaging *** the DDR plays a significant role in drug discovery using the principle of synthetic lethality. The incomplete current knowledge of the DDR encouraged us to develop new strategies to identify and study its components and pathways. Polycarcin V, belonging to the C-aryl glycoside natural products, is a light-activatable DNA-intercalating agent that causes DNA damage by forming a covalent [2+2]cycloadduct with thymine residue under 365–450 nm of light irradiation in a DNA-sequence-independent manner. Taking advantage of the light-activatable feature and temporal control of DDR, we designed and synthesized polycarcin V-based bifunctional chemical probes, including one that cross-links DNA to DNA-binding protein to explore the DDR induced by polycarcin V and uncover novel DNA–protein interactions. Utilizing this chemical probe and activity-based protein profiling-stable isotope labeling with amino acids in cell culture, we identified 311 DNA-binding protein candidates, including known DDR factors and additional proteins that may be of interest in discovering new biology. We validated our approach by showing that our probe could specifically cross-link proteins involved in nucleotide excision repair(NER) that repair bulky DNA adducts. Our studies showed that the [2+2] cycloadduct formed by polycarcin V could indeed be repaired by NER in vivo. As a DNA-damaging agent, polycarcin V or its drug-like derivative plus blue light showed promising properties for psoriasis treatment, suggesting that it may itself hold promise for clinic applications.

关键词： polycarcin V [2+2] DNA photoadduct light-activatable chemical probe ABPP for DNA-binding protein proteomics psoriasis treatment

来源：评论

学校读者我要写书评

暂无评论

Simultaneously enhancing the photocatalytic and photothermal effect of NH_(2)-MIL-125-GO-Pt ternary heterojunction for rapid therapy of bacteria-infected wounds

引用

Bioactive Materials 2022年第12期7卷 421-432页

作者： Yue Luo Bo Li Xiangmei Liu Yufeng Zheng Erjing Wang Zhaoyang Li Zhenduo Cui Yanqin Liang Shengli Zhu 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 UniversityWuhan430062China School of Life Science and Health Engineering Hebei University of TechnologyTianjin300401China School of Materials Science and Engineering Peking UniversityBeijing100871China School of Materials Science&Engineering The Key Laboratory of Advanced Ceramics and Machining Technology By the Ministry of Education of ChinaTianjin UniversityTianjin300072China

Infections caused by bacteria threaten human health,so how to effectively kill bacteria is an urgent *** therefore synthesized a NH_(2)-MIL-125-GO-Pt ternary composite heterojunction with graphene oxide(GO)and platinum(Pt)nanoparticles co-doped with metal-organic framework(NH_(2)-MIL-125)for use in photocatalytic and photothermal synergistic disinfection under white light *** to the good conductivity of GO and the Schottky junction between Pt and MOF,the doping of GO and Pt will effectively separate and transfer the photogenerated electron-hole pairs generated by NH_(2)-MIL-125,thereby effectively improving the photocatalytic efficiency of NH_(2)-***,NH_(2)-MIL-125-GO-Pt has good photothermal effect under white light ***,the NH_(2)-MIL-125-GO-Pt composite can be used for effective *** antibacterial efficiency of NH_(2)-MIL-125-GO-Pt against Staphylococcus aureus and Escherichia coli were as high as 99.94%and 99.12%,respectively,within 20 min of white light *** vivo experiments showed that NH_(2)-MIL-125-GO-Pt could effectively kill bacteria and promote wound *** work brings new insights into the use of NH_(2)-MIL-125-based photocatalyst materials for rapid disinfection of environments with pathogenic microorganisms.

关键词： Bacterial infection NH_(2)-MIL-125 Antibacterial Photocatalytic Photothermal

来源：评论

学校读者我要写书评

暂无评论

PtNi-W/C with Atomically Dispersed Tungsten Sites Toward Boosted ORR in Proton Exchange Membrane Fuel Cell Devices

引用

Nano-Micro Letters 2023年第9期15卷 238-256页

作者： Huawei Wang Jialong Gao Changli Chen Wei Zhao Zihou Zhang Dong Li Ying Chen Chenyue Wang Cheng Zhu Xiaoxing Ke Jiajing Pei Juncai Dong Qi Chen Haibo Jin Maorong Chai Yujing Li Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081People’s Republic of China State Power Investment Corporation Hydrogen Energy Company LimitedBeijing 102209People’s Republic of China Faculty of Materials and Manufacturing Beijing University of TechnologyBeijing 100124People’s Republic of China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049People’s Republic of China

The performance of proton exchange membrane fuel cells is heavily dependent on the microstructure of electrode catalyst especially at low catalyst *** work shows a hybrid electrocatalyst consisting of PtNi-W alloy nanocrystals loaded on carbon surface with atomically dispersed W sites by a two-step straightforward ***-atomic W can be found on the carbon surface,which can form protonic acid sites and establish an extended proton transport network at the catalyst *** implemented in membrane electrode assembly as cathode at ultra-low loading of 0.05 mgPt cm^(−2),the peak power density of the cell is enhanced by 64.4%compared to that with the commercial Pt/C *** theoretical calculation suggests that the single-atomic W possesses a favorable energetics toward the formation of*OOH whereby the intermediates can be efficiently converted and further reduced to water,revealing a interfacial cascade catalysis facilitated by the single-atomic *** work highlights a novel functional hybrid electrocatalyst design from the atomic level that enables to solve the bottle-neck issues at device level.

关键词： Fuel cells Membrane electrode assembly PGM catalyst Synergistic catalysis Oxygen reduction

来源：评论

学校读者我要写书评

暂无评论

Adenosine triphosphate-responsive carbon dots nanoreactors for T_(1)-weighted magnetic resonance imaging-guided tumor chemodynamic therapy

引用

science China Materials 2024年第11期67卷 3742-3752页

作者： Fuchun Nan Xiaokuang Xue Jian Li Ke Liang Jian Wang William WYu Jiechao Ge Pengfei Wang School of Chemistry and Chemical Engineering Ministry of Education Key Laboratory of Special Functional Aggregated MaterialsShandong Key Laboratory of Advanced Organosilicon Materials and TechnologiesShandong UniversityJinan 250100China Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion Science Center for Material Creation and Energy ConversionShandong UniversityQingdao 266237China Key Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU-CAS Joint Laboratory of Functional Materials and Devices Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China

There are various strategies to conduct tumor microenvironment(TME)stimulus-responsive(e.g.,acid,H_(2)O_(2)or glutathione)nanoreactors for increasing the efficiency of chemodynamic therapy(CDT).Among these,the exploitation of adenosine triphosphate(ATP,another overexpressed biomarker in TME)-responsive nanoreactors for tumor CDT is still ***,the ATP-responsive iron-doped CDs(FeCDs)were firstly prepared and then coassembled with glucose oxidase(GOx)to obtain FeCDs/GOx liposomes as ATP-responsive *** TME conditions,the nanoreactors initially released FeCDs and ***,with the existence of ATP,iron ions were rapidly released from the FeCDs to trigger Fenton/Fenton-like reactions for generating·***,the T_(1)-weighted magnetic resonance imaging(MRI)was achieved due to the released iron ***,the GOx converted endogenous glucose in tumor to gluconic acid and H_(2)O_(2)to satisfy the requirement of·OH *** vitro as well as in vivo experiments illustrated that the obtained ATP-responsive CD nanoreactors could be used as a versatile nanotheranostics for simultaneously T_(1)-weighted MRI-guided tumor *** work presents a new ATP-responsive nanoreactor with selfsupplied H_(2)O_(2)for multifunctional nanotheranostic applications.

关键词： carbon dots adenosine triphosphate self-supplied H_(2)O_(2) glucose oxidase chemodynamic therapy

来源：评论

学校读者我要写书评

暂无评论

advanced chemical modification technology of inorganic oxide nanoparticles in epoxy resin and mechanical properties of epoxy resin nanocomposites: A review

引用

Nano Materials science 2024年

作者： Jin, Runze Xu, Baosheng Guo, Donghui Shi, Baolu Chen, Yu Jia, Xinlei Qu, Lijie Institute of Advanced Structure Technology Beijing Institute of Technology Beijing100081 China Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures Beijing Institute of Technology Beijing100081 China School of Light Industry and Engineering Beijing Technology and Business University Beijing100048 China China Light Industry Engineering Technology Research Center of Advanced Flame Retardants Beijing100048 China

Over the past several decades, the integration of IONs into EP emerged as an effective method for enhancing its mechanical properties. Nevertheless, challenges remain, especially with u-IONs, where the interfacial strength with EP is suboptimal, resulting in aggregation within the EP matrix and a subsequent deterioration in the mechanical performance of u-ION/EP nanocomposites. In this comprehensive review, we explored advanced chemical modification techniques tailored for IONs incorporated into EP, providing a detailed examination of the mechanical characteristics of surface cm-ION/EP nanocomposites. This review investigates various chemical modification methods and their distinct impacts on the mechanical attributes of the resulting EP nanocomposites. Special emphasis is given to addressing the persistent challenges of inadequate interfacial strength and aggregation. Furthermore, this article examines prospective surface modification approaches for inorganic oxide nanoparticles, offering a visionary outlook on methods to improve the mechanical performance of EP in future. © 2024 Chongqing University

关键词： Nanocomposites Resins Mechanical properties

来源：评论

学校读者我要写书评

暂无评论

A double-layer covered architecture with spinel phase induced by LiPP for Co-free Li-rich cathode with high-rate performance and long lifespan

引用

Nano Research 2023年第5期16卷 6805-6814页

作者： Ruiqi Zhao Manman Wu Peixin Jiao Xueting Wang Jie Zhu Yang Zhao Hongtao Zhang Kai Zhang Chenxi Li Yanfeng Ma Yongsheng Chen The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Institute of Polymer ChemistryCollege of ChemistryNankai UniversityTianjin 300071China State Key Laboratory of Elemento-Organic Chemistry Nankai UniversityTianjin 300071China Renewable Energy Conversion and Storage Center(RECAST) Nankai UniversityTianjin 300071China Department Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China Engineering Research Center of High-efficiency Energy Storage(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China

Co-free Li-rich Mn-based layered oxides are promising candidates for next-generation lithium-ion batteries(LIBs)due to their high specific capacity,high voltage,low ***,their commercialization is hindered by limited cycle life and poor rate ***,an in-situ simple and low-cost strategy with a nanoscale double-layer architecture of lithium polyphosphate(LiPP)and spinel phase covered on top of the bulk layered phase,is developed for Li_(1.2)Mn_(0.6)Ni_(0.2)O_(2)(LMNO)using Li^(+)-conductor LiPP(denoted as LMNO@S-LiPP).With such a double-layer covered architecture,the half-cell of LMNO@S-LiPP delivers an extremely high capacity of 202.5 mAh·g^(−1)at 1 A·g^(−1)and retains 85.3%of the initial capacity after 300 cycles,so far,the best highrate electrochemical performance of all the previously reported *** energy density of the full-cell assembled with commercial graphite reaches 620.9 Wh·kg^(−1)(based on total weight of active materials in cathode and anode).Mechanism studies indicate that the superior electrochemical performance of LMNO@S-LiPP is originated from such a nanoscale double-layer covered architecture,which accelerates Li-ion diffusion,restrains oxygen release,inhibits interfacial side reactions,suppresses structural degradation during ***,this strategy is applicable for other high-energy-density cathodes,such as LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2),Li_(1.2)Ni_(0.13)Co_(0.13)Mn_(0.54)O_(2),LiCoO_(2).Hence,this work presents a simple,cost-effective,scalable strategy for the development of high-performance cathode materials.

关键词： Co-free Li-rich layered oxides double-layer covered architecture lithium polyphosphate high-rate performance long cycle life

来源：评论

学校读者我要写书评

暂无评论

Dimensionality Engineering and Novel Synthesis of Bi2o2te Nanowires from Their 2d Nanoplates

SSRN

引用

SSRN 2024年

作者： Ma, Zhiyao Zhou, Jian Yang, Guowei School of Materials Science and Engineering Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices Laboratory of Advanced Electronics and Fiber Materials Sun Yat-sen University Guangdong Guangzhou510275 China

To address the growing demand for high-performance 1D nanostructured semiconductors, this study reports on the directional growth of Bi2O2Te nanowires facilitated by a Au nanoparticle-catalyzed Vapor-Liquid-Solid (VLS) process. Central to this process is the catalytic role of Au nanoparticles, which facilitate the formation of a liquid alloy phase crucial for VLS growth. We reveal how the growth of Bi2O2Te nanowires is directionally influenced by the crystallographic orientation of the material and the dynamics at the liquid-solid interface, presenting the process's ability to transition the intrinsic properties of 2D materials into 1D nanostructures. © 2024, The Authors. All rights reserved.

关键词： Bismuth compounds

来源：评论

学校读者我要写书评

暂无评论

Effect of GNPs on microstructures and mechanical properties of GNPs/Al-Cu composites with different heat treatment status

引用

Journal of Materials science & technology 2021年第33期92卷 1-10页

作者： Tielong Han Fucheng Wang Jiajun Li Chunnian He Naiqin Zhao School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials Tianjin UniversityTianjin 300072China Faculty of Materials and Manufacturing Key Laboratory of Advanced Functional MaterialsMinistry of Education of ChinaBeijing University of TechnologyBeijing 100124China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou 350207China Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072China Key Laboratory of Advanced Ceramics and Machining Technology Ministry of EducationTianjin UniversityTianjin 300072China

Microstructural and mechanical behavior of heat treatable Al-4.6Cu binary alloy reinforced with graphene nanoplates(GNPs) in different heat treatment status were investigated in this *** addition of GNPs significantly enhanced the yield strength and tensile strength of Al-Cu alloy regardless of the heattreatment *** was also found that GNPs accelerated the formation of precipitates,leading to a greatly shortened aging time for GNPs/Al-4.6Cu composite to reach the peak ***,aging treatment enhanced the strength of GNPs/Al-Cu composite very little,which could be explained by the interaction between GNPs,precipitates and *** work inspires us that the heat treatment process of aluminum alloy matrix composites should be designed independently with the matrix in quest of an optimum performance.

关键词： Metal matrix composites Al-Cu alloy Graphene nanoplates Heat treatment

来源：评论

学校读者我要写书评

暂无评论

s±-Wave Pairing and the Destructive Role of Apical-Oxygen Deficiencies in La3Ni2O7 under Pressure

引用

Physical Review Letters 2023年第23期131卷 236002-236002页

作者： Yu-Bo Liu Jia-Wei Mei Fei Ye Wei-Qiang Chen Fan Yang School of Physics Beijing Institute of Technology Beijing 100081 China Department of Physics Southern University of Science and Technology Shenzhen 518055 China Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices Southern University of Science and Technology Shenzhen 518055 China

Recently, the bilayer perovskite nickelate La3Ni2O7 has been reported to show evidence of high-temperature superconductivity (SC) under a moderate pressure of about 14 GPa. To investigate the superconducting mechanism, pairing symmetry, and the role of apical-oxygen deficiencies in this material, we perform a random-phase approximation based study on a bilayer model consisting of the dx2−y2 and d3z2−r2 orbitals of Ni atoms in both the pristine crystal and the crystal with apical-oxygen deficiencies. Our analysis reveals an s±-wave pairing symmetry driven by spin fluctuations. The crucial role of pressure lies in that it induces the emergence of the γ pocket, which is involved in the strongest Fermi-surface nesting. We further found the emergence of local moments in the vicinity of apical-oxygen deficiencies, which significantly suppresses the Tc. Therefore, it is possible to significantly enhance the Tc by eliminating oxygen deficiencies during the synthesis of the samples.

关键词： Multiband superconductivity Pairing mechanisms Superconducting order parameter Superconductivity Superconductors

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：