检索结果-内蒙古大学图书馆

Confined cobalt single-atom catalysts with strong electronic metal-support interactions based on a biomimetic self-assembly strategy

引用

Carbon Energy 2024年第9期6卷 156-171页

作者： Bowen Guo Zekun Wang Lei Zheng Guang Mo Hongjun Zhou Dan Luo State Key Laboratory of Heavy Oil Processing Beijing Key Laboratory of Biogas Upgrading UtilizationCollege of New Energy and MaterialsChina University of Petroleum(Beijing)BeijingChina Beijing Key Laboratory of Micro-Nano Energy and Sensor CAS Center for Excellence in NanoscienceBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijingChina School of Chemical Engineering Shandong Institute of Petroleum and Chemical TechnologyDongyingShandongChina School of Chemistry Beijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijingChina Institute of High Energy Physics Chinese Academy of SciencesBeijingChina

Designing high-performance and low-cost electrocatalysts for oxygen evolu-tion reaction(OER)is critical for the conversion and storage of sustainable energy *** by the biomineralization process,we utilized the phosphorylation sites of collagen molecules to combine with cobalt-based mononuclear precursors at the molecular level and built a three-dimensional(3D)porous hierarchical material through a bottom-up biomimetic self-assembly strategy to obtain single-atom catalysts confined on carbonized biomimetic self-assembled carriers(Co SACs/cBSC)after subsequent high-temperature *** this strategy,the biomolecule improved the anchoring efficiency of the metal precursor through precise functional groups;meanwhile,the binding-then-assembling strategy also effectively suppressed the nonspecific adsorption of metal ions,ultimately preventing atomic agglomeration and achieving strong electronic metal-support interactions(EMSIs).Experimental characterizations confirm that binding forms between cobalt metal and carbonized self-assembled substrate(Co–O_(4)–P).Theoretical calculations disclose that the local environment changes significantly tailored the Co d-band center,and optimized the binding energy of oxygenated intermediates and the energy barrier of oxygen *** a result,the obtained Co SACs/cBSC catalyst can achieve remarkable OER activity and 24 h durability in 1 M KOH(η_(10) at 288 mV;Tafel slope of 44 mV dec^(-1)),better than other transition metal-based catalysts and commercial IrO_(2).Overall,we presented a self-assembly strategy to prepare transition metal SACs with strong EMSIs,providing a new avenue for the preparation of efficient catalysts with fine atomic structures.

关键词： biomimetic self-assembly support electronic metal-support interactions oxygen evolution reaction single atoms catalysts

来源：评论

学校读者我要写书评

暂无评论

Band Offset Investigation of Cu2O/ZnO1-xSx Heterojunctions Using Ultraviolet Photoelectron Spectroscopy

SSRN

引用

SSRN 2024年

作者： Lakshmanan, A. Alex, Zachariah C. Meher, Samir Ranjan Department of Physics School of Advanced Sciences Vellore Institute of Technology Vellore632014 India Department of Sensor and Biomedical Technology School of Electronics Engineering Vellore Institute of Technology Vellore632014 India

The primary goal of this work is to find the appropriate S concentration in n – ZnO1-xSx buffer layers to form an optimal band offset with p – Cu2O solar cell absorber layer. The absorber layer and buffer layers were deposited via reactive magnetron sputtering. The respective work functions and valence band positions were obtained through UPS measurement. The ZnO1-xSx buffer layers with ~ 70 % S composition is found to have an optimal positive conduction band offset with the Cu2O absorber layer. Further, the lattice mismatch between the absorber layer and buffer layers were obtained from the XRD. © 2024, The Authors. All rights reserved.

关键词： Heterojunctions

来源：评论

学校读者我要写书评

暂无评论

Wafer-level substrate-free YIG single crystal film for a broadband tunable terahertz isolator

引用

Photonics Research 2024年第3期12卷 505-513页

作者： XILAI ZHANG DAN ZHAO DING ZHANG QIANG XUE FEI FAN YULONG LIAO QINGHUI YANG QIYE WEN School of Electronic Science and Engineering State Key Laboratory of Electronic Thin Film and Integrated DevicesUniversity of Electronic Science and Technology of ChinaChengdu 610054China Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology Institute of Modern OpticsNankai UniversityTianjin 300350China Shenzhen Institute for Advanced Study University of Electronic Science and Technology of ChinaShenzhen 518110China

Yttrium iron garnet(YIG)is a promising material for various terahertz applications due to its special optical *** present,a high-quality YIG wafer is the desire of terahertz communities and it is still challenging to prepare substrate-free YIG single crystal *** this work,we prepared wafer-level substrate-free La:YIG single crystal films,for the first time,to our *** optical and magneto-optical properties of La:YIG films were characterized by terahertz time domain spectroscopy(THz-TDS).Results show that the as-prepared La:YIG film has an insertion loss of less than 3 dB and a low absorption coefficient of less than10 cm-1below 1.6 *** from the thickness of the substrate-free YIG films and low insertion loss,their terahertz properties could be further manipulated by simply using a wafer-stacking *** four La:YIG films were stacked,there was an insertion loss of less than 10 dB in the range of 0.1-1.2 *** Faraday rotation angle of the four-layer-stacked La:YIG films reached 19°,and the isolation could reach17 *** further increasing the stacking number to eight pieces,a remarkable Faraday rotation angle of45°was achieved with an isolation of 23 dB,which is important for practical application in the THz *** material may provide a milestone opportunity to make various non-reciprocal devices,such as isolators and phase shifters.

关键词： YIG film insertion

来源：评论

学校读者我要写书评

暂无评论

Engineering design of feedstock powder and relevant thermal-mechanical performance of thermal/environmental barrier coatings

引用

Journal of advanced Ceramics 2025年第2期14卷 37-56页

作者： Xinchang Feng Fangwei Guo Lirong Luo Yuzhang Wang Yun Long Xiaofeng Zhao Fei Pan Lei Guo Qingfeng Zeng Jing Feng Chunlei Wan Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China National Engineering Research Center of Special Equipment and Power System for Ship and Marine Engineering Shanghai 200030China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Advanced Nuclear Energy Technology Nuclear Power Institute of ChinaChengdu 610213China Innovative Sensor Technology IST AG Ebnat-Kappel 9642Switzerland School of Materials Science and Engineering Tianjin UniversityTianjin 300072China Tianmushan Laboratory Hangzhou 311115China School of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

The development of aeroengine with a high thrust-weight ratio poses great challenges for current top-coating thermal barrier coatings (TBCs) and environmental barrier coatings (EBCs) in service. Medium/high-entropy ceramics are highly promising candidate material for advanced TBCs/EBCs owing to their low thermal conductivity, high melting point, high-temperature stability, and calcium–magnesium–alumino–silicate (CMAS) resistance. Most feedstock powder used for medium/high-entropy TBCs/EBCs is prepared via traditional spray drying, which cannot fully exploit the advantages of multicomponent ceramics. The density, sphericity, inner structure, and flowability of feedstock powder affect their melting state during the thermal spraying process, which strongly affects the microstructure and properties of the deposited coatings. Therefore, the deposited coatings exhibit phase segregation, amorphous phases, and microstructure defects owing to unpredictable variations in feedstock powder with random morphologies and structures. Here, the structure and properties of feedstock powder prepared by state-of-the-art granulation technologies and their influences on the deposited coatings were systematically investigated, which can provide guidance for configuration optimization of feedstock powder and the manufacturing accuracy of the deposited coating. This review aims to bridge the gap between cutting-edge ceramics and advanced engineering technologies, thus providing concrete background knowledge and crucial guidelines for designing and developing TBCs/EBCs.

关键词： thermal/environmental barrier coatings(TBCs/EBCs) spraying ceramic powder multiscale structure control high-entropy ceramics thermal-mechanical performance

来源：评论

学校读者我要写书评

暂无评论

Design and Testing of an IoT Enabled RFID Based Automatic Luggage Sorting and Tracking System

Design and Testing of an IoT Enabled RFID Based Automatic Lu...

引用

IEEE Calcutta Conference (CALCON)

作者： Tiyasa Chatterjee Sudipta Sarkar Ambik Basak Soumyadip Pal Ashoke Mondal Department of Electronics and Communication Engineering RCC Institute of Information Technology Kolkata India School of Advanced Materials Green Energy and Sensor Systems Indian Institute of Engineering Science and Technology Shibpur Howrah India

ISBN: (数字)9798331516666

ISBN: (纸本)9798331516673

In the present day, the number of people travelling in flight is rapidly increasing. All the passengers travelling through these airlines carry luggage. Which is increasing luggage. At the airport, all this luggage goes through multiple processes like checking, tagging, shorting, etc. In this process, due to various reasons, they got lost. Paper-based barcodes are used for ragging the luggage. The barcode method of luggage sorting is time-consuming, and prone to technical errors as the tags can store only limited data and the date needs to be manually updated. Damaged tags result in loss of cargo during the loading process. This article focuses on analysing the real-life problem of luggage sorting and tracking at a busy airport by using two advanced technologies RFID and IoT. Among multiple literature on RFID Based Luggage Sorting there is a gap in implementing IoT-based tracking of luggage, along with RFID-based identification. Which brings novelty to this project. The paper aims to provide a simplified technique for automatic luggage sorting using RFID and tracking over IoT, along with design, implementation and testing data.

关键词： Automation Loading Tagging Airports Sorting Radiofrequency identification Testing Airline industry

来源：评论

学校读者我要写书评

暂无评论

Fast prototype and rapid construction of three-dimensional and multi-scaled pitcher for controlled drainage by systematic biomimicry

引用

International Journal of Extreme Manufacturing 2024年第3期6卷 489-503页

作者： Tao Shen Ning Li Shijie Liu Cunlong Yu Chengqi Zhang Kang Yang Xingfei Li Ruochen Fang Lei Jiang Zhichao Dong Research Institute for Frontier Science Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education BeijingSchool of ChemistryBeihang UniversityBeijing 100191People’s Republic of China CAS Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190People’s Republic of China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083People’s Republic of China School of Future Technology&School of Nanoscience and Engineering University of Chinese Academy of SciencesBeijing 101407People’s Republic of China School of Chemistry and Materials Science University of Science and Technology of China230026 HefeiAnhuiPeople’s Republic of China Suzhou Institute for Advanced Research University of Science and Technology of China215123 SuzhouJiangsuPeople’s Republic of China State Key Laboratory of Precision Measuring Technology and Instruments Tianjin University300072 TianjinPeople’s Republic of China

Biomimetic materials that use natural wisdom to solve practical problems are developing *** trend for systematic biomimicry is towards in-situ characterization of naturalcreatures with high spatial ***,rapid reconstruction of digital twin models with the same complex features as the prototype is ***,it faces bottlenecks and limits in fast characterization and fabrication,precise parameter optimization,geometricdeviations control,and quality *** solve these challenges,here,we demonstrate astate-of-the-art method taking advantage of micro-computed tomography and three-dimensional printing for the fast characterization of the pitcher plant Nepenthes x ventrata and fabrication of its biomimetic model to obtain a superior drainage controller with multiscale structures withprecise surface morphology optimization and geometric deviation ***-rupture-based drainage dynamic and mechanisms are characterized by x-ray and high-speed videography,which determines the crucial structures for unique *** the optimized artificial pitchers are further developed into sustained drainage devices with novel applications,such as detection,reaction,and smoke control.

关键词： systematic biomimicry biomimetic materials Micro-CT drainage digital twin

来源：评论

学校读者我要写书评

暂无评论

Construction of CeO2-MOF nanorods with oxygen vacancies for nanozyme catalytic antibacterial application

引用

Journal of Industrial and Engineering Chemistry 2025年 149卷 554-565页

作者： Yang, Meinan Wang, Nan Wang, Xu Zhang, Ruiyong Etim, Ini-lbehe Nabuk Yue, Mei-E. Duan, Jizhou Hou, Baorong Sand, Wolfgang College of Biological Engineering Qingdao University of Science and Technology Qingdao266042 China Key Laboratory of Advanced Marine Materials Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of Oceanology Chinese Academy of Sciences Qingdao266071 China Marine Chemistry and Corrosion Research Group Department of Marine Science Akwa Ibom State University P.M.B. 1167 Uyo Nigeria Key Laboratory of Sensor Analysis of Tumor Marker Ministry of Education College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao266042 China

Oxygen vacancies can provide active sites for catalysts, promoting catalytic activity. However, there are fewer nanozyme catalysts with oxygen vacancies. In this study, CeO2 metal–organic framework (CeO2-MOF) nanorods with oxygen vacancies are synthesized through a simple hydrothermal and calcination processes. The obtained CeO2-MOFs exhibit excellent nanozyme catalytic activity for antibacterial applications. The CeO2-MOF nanorods demonstrate intrinsic haloperoxidase-like activity by catalyzing the bromination of organic signaling compounds, outperforming the catalytic properties of pure CeO2. The activity of CeO2-MOF(6) is the best because of its large specific surface area of 103.638 m2/g, surpassing that of CeO2 at 74.752 m2/g. The oxygen vacancies are crucial in regulating the electronic structure of CeO2-MOFs, thereby improving the catalytic performance. The experiments of multiple substrates show that CeO2-MOF(6) exhibits good stability and recyclability. Additionally, CeO2-MOF(6) can catalyze the oxidation of Br- with H2O2 to the corresponding hypobromous acid (HBrO), which exhibits strong antibacterial activity against typical marine bacteria (Pseudomonas aeruginosa). This study expands the range of biomimetic enzyme materials. It provides an efficient and green perspective and strategy for developing antibacterial and antifouling biomimetic catalysts, which offers a sustainable alternative for industrial applications in marine coatings and environmental protection. © 2025

关键词： Nanorods

来源：评论

学校读者我要写书评

暂无评论

Experimental and Ab Initio Studies of the Structural and Optoelectronic Properties of Hexagonal Wurtzite Zno1-Xsx Alloys

SSRN

引用

SSRN 2023年

The structural and optoelectronic properties of ZnO1-xSx alloys were explored experimentally as well as through ab initio calculations. The radiofrequency magnetron sputtering was used to grow ZnO1-xSx alloy thin film... 详细信息

关键词： Thin films

来源：评论

学校读者我要写书评

暂无评论

Optimizing food taste sensory evaluation through neural network-based taste electroencephalogram channel selection

arXiv

引用

arXiv 2024年

作者： Xia, Xiuxin Wang, Qun Wang, He Liu, Chenrui Li, Pengwei Shi, Yan Men, Hong School of Automation Engineering Northeast Electric Power University Jilin132012 China Institute of Advanced Sensor Technology Northeast Electric Power University Jilin132012 China

The taste electroencephalogram (EEG) evoked by the taste stimulation can reflect different brain patterns and be used in applications such as sensory evaluation of food. However, considering the computational cost and efficiency, EEG data with many channels has to face the critical issue of channel selection. This paper proposed a channel selection method called class activation mapping with attention (CAM-Attention). The CAM-Attention method combined a convolutional neural network with channel and spatial attention (CNN-CSA) model with a gradient-weighted class activation mapping (Grad-CAM) model. The CNN-CSA model exploited key features in EEG data by attention mechanism, and the Grad-CAM model effectively realized the visualization of feature regions. Then, channel selection was effectively implemented based on feature regions. Finally, the CAM-Attention method reduced the computational burden of taste EEG recognition and effectively distinguished the four tastes. In short, it has excellent recognition performance and provides effective technical support for taste sensory evaluation. Copyright © 2024, The Authors. All rights reserved.

关键词： Electroencephalography

来源：评论

学校读者我要写书评

暂无评论

Pluggable multitask diffractive neural networks based on cascaded metasurfaces

引用

Opto-Electronic Advances 2024年第2期7卷 23-31页

作者： Cong He Dan Zhao Fei Fan Hongqiang Zhou Xin Li Yao Li Junjie Li Fei Dong Yin-Xiao Miao Yongtian Wang Lingling Huang Beijing Engineering Research Center of Mixed Reality and Advanced Display Key Laboratory of Photoelectronic Imaging Technology and System of Ministry of Education of ChinaSchool of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China Institute of Modern Optics Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network TechnologyNankai UniversityTianjin 300350China Department of Physics and Optoelectronics Faculty of ScienceBeijing University of TechnologyBeijing 100124China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100191China Beijing Aerospace Institute for Metrology and Measurement Technology Beijing 100076China

Optical neural networks have significant advantages in terms of power consumption,parallelism,and high computing speed,which has intrigued extensive attention in both academic and engineering *** has been considered as one of the powerful tools in promoting the fields of imaging processing and object ***,the existing optical system architecture cannot be reconstructed to the realization of multi-functional artificial intelligence systems *** push the development of this issue,we propose the pluggable diffractive neural networks(P-DNN),a general paradigm resorting to the cascaded metasurfaces,which can be applied to recognize various tasks by switching internal *** the proof-of-principle,the recognition functions of six types of handwritten digits and six types of fashions are numerical simulated and experimental demonstrated at near-infrared ***,the proposed paradigm not only improves the flexibility of the optical neural networks but paves the new route for achieving high-speed,low-power and versatile artificial intelligence systems.

关键词： optical neural networks diffractive deep neural networks cascaded metasurfaces

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：