检索结果-内蒙古大学图书馆

Manipulating micro-electric field and coordination-saturated site configuration boosted activity and safety of frustrated single-atom Cu/O Lewis pair for acetylene hydrochlorination

引用

Nano Research 2023年第7期16卷 9039-9049页

作者： Junchen Peng Dandan Dong Zongyuan Wang Hong Yang Dongyang Qiao Qinqin Wang Wei Sun Minmin Liu Jiajun Wang Mingyuan Zhu Bin Dai Fei He Chaofeng Huang School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering Shihezi UniversityShihezi 832000China School of Chemistry and Chemical Engineering Southeast UniversityNanjing 211189China School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China College of Chemistry&Chemical Engineering Yantai UniversityYantai 264010China School of Material Science and Engineering University of JinanJinan 250022China

Simultaneously boosting acetylene hydrochlorination activity and avoiding formation of explosive copper acetylide over Cu-based catalyst,which represented a promising alternative to Hg-based and noble metal catalysts,remained ***,we fabricated a frustrated single-atom Cu/O Lewis pair catalyst(Cu/O-FLP)by coupling epoxide group(C-O-C)with atomdispersed Cu-cis-N_(2)C_(2)Cl center to address this *** basic epoxy site modulated the electron-deficient state of Lewisacidic Cu center and paired with the Cu-cis-N_(2)C_(2)Cl moiety to preferentially break HCl into different electronegative Cu-Clδ-and C-O-H^(δ+)intermediates,which further induced both an extra localized electric field to polarize acetylene and a upshift of the dband center of catalyst,thereby promoting adsorption and enrichment of acetylene by enhancing the dipolar interaction between acetylene and active ***,the generated Cu-Clδ-and C-O-H^(δ+)drastically reduced the energy barrier of ratelimiting step and made vinyl chloride easier to desorb from the Lewis-basic oxygen-atom site rather than traditional Lewis-acidic Cu *** superiorities ensured a higher activity of Cu/O-FLP compared with its ***,preferential dissociation of HCl endowed single-atom Cu with the coordination-saturated configuration,which impeded formation of explosive copper acetylide by avoiding the direct interaction between Cu and acetylene,ensuring the intrinsic safety during catalysis.

关键词： acetylene hydrochlorination Lewis pair single-atom Cu site configuration electric field

来源：评论

学校读者我要写书评

暂无评论

Rational design of large anomalous Nernst effect in Dirac semimetals

引用

npj Computational materials 2023年第1期9卷 258-264页

作者： Panshuo Wang Zongxiang Hu Xiaosong Wu Qihang Liu Shenzhen Institute for Quantum Science and Engineering and Department of Physics Southern University of Science and Technology518055 ShenzhenChina State Key Laboratory for Artificial Microstructure and Mesoscopic Physics Frontiers Science Center for Nano-optoelectronicsand Collaborative Innovation Center of Quantum MatterPeking University100871 BeijingChina Guangdong Provincial Key Laboratory of Computational Science and Material Design Southern University of Science and Technology518055 ShenzhenChina Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices Southern University of Science and Technology518055 ShenzhenChina

Anomalous Nernst effect generates a transverse voltage perpendicular to the temperature *** has several advantages compared with the longitudinal thermoelectricity for energy conversion,such as decoupling of electronic and thermal transports,higher flexibility,and simpler lateral ***,a design principle beyond specific materials systems for obtaining a large anomalous Nernst conductivity(ANC)is still *** this work,we theoretically demonstrate that a pair of Dirac nodes under a Zeeman field manifests an odd-distributed,double-peak anomalous Hall conductivity curve with respect to the chemical potential and a compensated carrier feature,leading to an enhanced ANC compared with that of a simple Weyl semimetal with two Weyl *** on first-principles calculations,we then provide two Dirac semimetal candidates,i.e.,Na3Bi and NaTeAu,and show that under a Zeeman field,they exhibit a sizable ANC value of 0.4 Am^(-1)K^(-1) and 1.3 Am^(-1)K^(-1),respectively,near the Fermi *** an approach is also applicable to ferromagnetic materials with intrinsic Zeeman splitting,as exemplified by a hypothetical alloy NaFeTe2Au2,exhibiting an ANC as high as 3.7 Am^(-1)K^(-1) at the Fermi *** work provides a design principle with a prototype band structure for enhanced ANC pinning at the Fermi level,shedding light on the inverse design of other specific functional materials based on electronic structure.

关键词： structure Nernst Dirac

来源：评论

学校读者我要写书评

暂无评论

A comprehensive review on Bi_(2)Te_(3)-based thin films: Thermoelectrics and beyond

引用

Interdisciplinary materials 2022年第1期1卷 88-115页

作者： Xinfeng Tang Ziwei Li Wei Liu ingjie Zhang Ctirad Uher State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanChina Department of Physics University of MichiganAnn ArborMichiganUSA

Bi_(2)Te_(3)-based materials are not only the most important and widely used room temperature thermoelectric(TE)materials but are also canonical examples of topological insulators in which the topological surface states are protected by the time-reversal ***-performance thin films based on Bi_(2)Te_(3)- have attracted worldwide attention during the past two decades due primarily to their outstanding TE performance as highly efficient TE coolers and as miniature and flexible TE power generators for a variety of electronic ***,intriguing topological phenomena,such as the quantum anomalous Hall effect and topological superconductivity discovered in Bi_(2)Te_(3)-based thin films and heterostructures,have shaped research directions in the field of condensed matter *** Bi_(2)Te_(3)-based films and heterostructures,delicate control of the carrier transport,film composition,and microstructure are prerequisites for successful device operations as well as for experimental verification of exotic topological *** review summarizes the recent progress made in atomic defect engineering,carrier tuning,and band engineering down to a nanoscale regime and how it relates to the growth and fabrication of high-quality Bi_(2)Te_(3)-based *** review also briefly discusses the physical insight into the exciting field of topological phenomena that were so dramatically realized in Bi_(2)Te_(3)-and Bi_(2)Se_(3)‐based *** is expected that Bi_(2)Te_(3)-based thin films and heterostructures will play an ever more prominent role as flexible TE devices collecting and converting low-level(body)heat into electricity for numerous electronic *** is also likely that such films will continue to be a remarkable platform for the realization of novel topological phenomena.

关键词： Bi_(2)Te_(3)-based thin films and heterostructures device applications thermoelectric topological phenomena

来源：评论

学校读者我要写书评

暂无评论

Industrial-Scale Polypropylene–Polyethylene Physical Alloying Toward Recycling

引用

Engineering 2022年第2期8卷 95-100页

作者： Jinping Qu Zhaoxia Huang Zhitao Yang Guizhen Zhang Xiaochun Yin Yanhong Feng Hezhi He Gang Jin Ting Wu Guangjian He Xianwu Cao National Engineering Research Center of Novel Equipment for Polymer Processing&Key Laboratory of Polymer Processing Engineering of the Ministry of Education&Guangdong Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing School of Mechanical and Automotive EngineeringSouth China University of TechnologyGuangzhou 510640China

Polypropylene(PP)and polyethylene(PE)play central roles in our daily ***,their immiscibility presents a major hurdle in both industry and academia when recycling them into alloys with favorable mechanical ***,typical compatibilizer-enabled approaches are limited due to increased environmental ***,inspired by a traditional Chinese technique,we report a facile,industry-scale methodology that produces a PP/PE binary blend with a highly ordered honeycomb nanostructure without any *** to its nanostructure,the blend exhibits enhanced tensile properties in com-parison with the parent components or with a sample prepared using an internal *** approach has potential for applications not only in immiscible polymer blending,but also in non-sorting,compatibilizer-free waste plastics *** this technique,we expect that an environmentally friendly and sustainable plastic wastes recycling avenue can be found,and great economic benefits can be gained.

关键词： Polypropylene Polyethylene Physical alloying Honeycomb structure

来源：评论

学校读者我要写书评

暂无评论

Ultrasensitive methyl salicylate gas sensing determined by Pd-doped SnO_(2)

引用

Frontiers of materials Science 2022年第4期16卷 71-79页

作者： Chaoqi ZHU Xiang LI Xiaoxia WANG Huiyu SU Chaofan MA Xiang GUO Changsheng XIE Dawen ZENG State Key Laboratory of Material Processing and Die&Mould Technology Department of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Science and Technology on Aerospace Chemical Power Laboratory Hubei Institute of Aerospace ChemotechnologyXiangyang 441003China

Efficient chemicalwarfare agents(CWAs)detection is required to protect people from the cWAs in war and *** this work,a Pd-doped SnO_(2)nanoparticles-based gas sensor was developed to detect a nerve agent simulant named methyl *** sensing measurements of methyl salicylate under different Pd doping amounts found that the 0.5 at.%Pd-doped SnO_(2)exhibited a significant improvement in the detection of methyl salicylate at the ppb(1ppb=10-9)level,and the response value to 160 ppb methyl salicylate is 0.72 at 250℃.Compared with the pure SnO_(2),the response value is increased by 4.5 times,which could be attributed to the influence of the noble metal Pd on the oxygen state and its catalytic *** addition,the 0.5at.%Pd-doped SnO_(2)sensor still has an obvious response to 16ppb methyl salicylate with a response value of 0.13,indicating the lower detection limit of the sensor.

关键词： SnO_(2) methyl salicylate gas sensor Pd doping noble metal

来源：评论

学校读者我要写书评

暂无评论

Multi-walled carbon nanotubes reversing the bone formation of bone marrow stromal cells by activating M2 macrophage polarization

引用

Regenerative Biomaterials 2023年第1期10卷 980-989页

作者： Runlian Lin Kun Ge Dehui Fan Jing Li Guoqiang Zhou Kaihan Zhang Yuanyu Huang Lili Ma Jinchao Zhang Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education Key Laboratory of Chemical Biology of Hebei ProvinceCollege of Chemistry and Material ScienceHebei UniversityBaoding 071002China College of Basic Medical Science Hebei UniversityBaoding 071000China Department of Chemistry The University of ManchesterManchester M139PLUK School of Life Science School of Medical TechnologyAdvanced Research Institute of Multidisciplinary ScienceKey Laboratory of Molecular Medicine and BiotherapyKey Laboratory of Medical Molecule Science and Pharmaceutics EngineeringBeijing Institute of TechnologyBeijing 100081China

Multi-walled carbon nanotubes(MWCNTs)are an excellent bone tissue repair material both in vitro and in *** interactions between MWCNTs and single type of cells of bone tissue,including osteoblasts,bone marrow stromal cells(BMSCs)or osteoclasts,have been extensively ***,the interactions between MWCNTs with different types of cells in the bone microenvironment remain *** microenvironment is a complex system composed of different types of cells,which have interactions between each *** this work,the effects of MWCNTs on bone microenvironment were firstly studied by culture of MWCNTs with BMSCs,osteoblasts,osteoclasts,macrophages and vascular endothelial cells,***,co-culture systems of macrophages-BMSCs,macrophages-calvaria and macrophages-BMSCs-vascular endothelial cells were treated with MWCNTs,*** osteogenic differentiation of BMSCs and osteoblasts was inhibited when these two types of cells were cultured with MWCNTs,***,when co-culture MWCNTs with BMSCs and macrophages,the osteogenesis of BMSCs was promoted by inducing the M2 polymerization of ***,MWCNTs promoted the bone formation in the osteolysis model of calvaria ex *** addition,the formation of osteoclasts was inhibited,and angiogenesis was increased when treated with *** study revealed the inconsistent effects of MWCNTs on single type of bone cells and on the bone *** results provided basic research data for the application of MWCNTs in bone tissue repair.

关键词： multi-walled carbon nanotubes bone microenvironments osteogenesis bone marrow stromal cells M2 macrophages cellular interactions

来源：评论

学校读者我要写书评

暂无评论

Probing the interlayer mechanical coupling of 2D layered materials-A review

引用

Progress in Natural Science:materials International 2022年第5期32卷 528-537页

作者： Yinghui Sun Yufei Sun Rongming Wang Kai Liu Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science School of Mathematics and Physics University of Science and Technology Beijing State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Key Laboratory of Advanced Materials of Ministry of Education School of Materials Science and Engineering Tsinghua University

Two-dimensional(2D) layered materials are assembled through the intralayer covalent bonds and interlayer van der Waals(vdWs) interactions. The relatively weak interlayer vdWs interactions result in the weak interlayer mechanical coupling between layers, which strongly impacts the overall mechanical properties of multilayer 2D materials or heterostructures. Experimentally probing the interlayer mechanical coupling is of vital importance on the accumulation of fundamental parameters for their applications in flexible and stretchable devices, yet there are hardly comprehensive reviews in this research field. In this review, we firstly introduce the probing methods of interlayer mechanical coupling, including high-frequency and ultralow-frequency Raman characterizations,nanoindentation of multilayer 2D materials or heterostructures, surface indentation, pressurized blister test,characterization of spontaneously formed nanoblisters, and nano-friction tests. Based on the analysis and comparison of the existing methods and results, we also discuss the advantages and limitations of each ***, the challenges and opportunities in this promising field are discussed. This review summarizes the recent progress in the probing of interlayer mechanical coupling of 2D layered materials and will provide important reference for the rational design of flexible and stretchable devices.

关键词： van der Waals interaction Mechanical properties Indentation Heterostructures

来源：评论

学校读者我要写书评

暂无评论

ZIF-Mediated Anchoring of Co species on N-doped Carbon Nanorods as an Efficient Cathode Catalyst for Zn-Air Batteries

引用

Energy & Environmental materials 2023年第3期6卷 257-263页

作者： Qiang Yu Jianshuai Lv Jiantao Li Ruohan Yu Jinsong Wu Shibo Xi Xinyuan Li Nuo Xu Liang Zhou Liqiang Ma State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Qingdao National Laboratory for Marine Science and Technology Qingdao 266237China Nanostructure Research Centre Wuhan University of TechnologyyWuhan 430070China Institute of Chemical and Engineering Sciences A*STAR(Agency for ScienceTechnology and Research)Singapore 627833Singapore School of Science Wuhan University of TechnologyWuhan 430070China

Developing efficient oxygen reduction reaction(ORR)catalyst is essential for the practical application of Zn-air batteries(ZABs).In this contribution,we develop a novel zeolitic imidazolate framework(ZIF)-mediated strategy to anchor Co species on N-doped carbon nanorods for efficient *** ultrahigh N-doping(10.29 at.%),monodisperse Co nanocrystal decoration,and well-dispersed Co-N_(x)functionalization,the obtained Co-decorated N-doped carbon nanorods(Co@NCNR)exhibit a decent ORR performance comparable to commercial Pt/C in alkaline *** ZABs have been assembled using Co@NCNR as the cathode *** assembled ZABs manifest high initial open-circuit voltage as well as high energy *** addition,the Co@NCNR also demonstrates ideal ORR performance in quasi-solid-state ZABs.

关键词： Co nanocrystals Co-N_(x) N-doped carbon oxygen reduction reaction Zn-air battery

来源：评论

学校读者我要写书评

暂无评论

Ternary layered boride MoAlB:A novel thermo-regulation microwave absorbing ceramic material

引用

Journal of advanced Ceramics 2024年第5期13卷 699-710页

作者： Zhangjue Wang Fan Zhang Nannan Wang Wei Li Yongqiang Chen Hailong Wang Rui Zhang Yanqiu Zhu Bingbing Fan School of Material Science and Engineering Zhengzhou UniversityZhengzhou 450001China Henan Academy of Sciences Zhengzhou 450046China State Key Laboratory of Featured Metal Materials and Life Cycle Safety for Composite Structures MOE Key Laboratory of New Processing Technology for Nonferrous Metals MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China Department of Materials and Earth Sciences Technical University of DarmstadtDarmstadt 64287Germany School of Material Science and Engineering Luoyang Institute of Science and TechnologyLuoyang 471023China Department of Engineering Faculty of EnvironmentScience and EconomyUniversity of ExeterExeter EX44QFUK

In the context of the fifth-generation(5G)smart era,the demand for electromagnetic wave(EMW)-absorbing materials has become increasingly prominent,so it is necessary to explore promising candidate *** work focuses on the exploration of the material absorbing properties of a MoAlB MAB(MAB represents a promising group of alternatives,where M stands for a transition metal,A typically denotes Al,and B is boron)phase ***,the first-principles calculations were performed to reveal the unique crystal and layered structure of the MoAlB ceramics and to predict their potential for use as an EMW absorption ***,a series of MoAlB ceramics were synthesized at temperatures ranging from 800 to 1300℃,and the influence of temperature on the phase compositions and microstructures of the obtained MoAlB ceramics was characterized and ***,the practical EMW absorption performance of the prepared MoAlB ceramics was evaluated via a combination of experiments and radar cross-sectional *** MoAlB sample synthesized at 900℃ exhibits superior EMW absorption performance,achieving an impressive minimum reflection loss(RL)of−50.33 *** unique layered structure and good electrical conductivity of the MoAlB samples are the main reasons for their enhanced wave absorption performance,which provides interfacial polarization and multiple dielectric loss ***,this study not only contributes to the understanding of the preparation of MoAlB materials but also provides potential guidance for their utilization in the realm of electromagnetic wave absorption.

关键词： MoAlB electronic band structure electromagnetic wave(EMW)absorption layered ternary boride density of states

来源：评论

学校读者我要写书评

暂无评论

Numerical simulation of circulating fluidization roasting desulfurization of high-sulfur bauxite based on computational particle fluid dynamics method

引用

Chinese Journal of Chemical Engineering 2025年 82卷 138-152页

作者： Fan, Langfeng Xie, Chengming Wei, Qijin Zhao, Hongliang Li, Rongbin Zhang, Yongmin Liu, Fengqin Sohn, Hong Yong State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Beijing100083 China School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing100083 China BGRIMM Technology Group Beijing100160 China State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing102249 China Department of Materials Science and Engineering The University of Utah Salt Lake CityUT84112 United States

As a pyrometallurgical process, circulating fluidized bed (CFB) roasting has good potential for application in desulfurization of high-sulfur bauxite. The gas–solid distribution and reaction during CFB roasting of high-sulfur bauxite were simulated using the computational particle fluid dynamics (CPFD) method. The effect of primary air flow velocity on particle velocity, particle volume distribution, furnace temperature distribution and pressure distribution were investigated. Under the condition of the same total flow of natural gas, the impact of the number of inlets on the desulfurization efficiency, atmosphere mass fraction distribution and temperature distribution in the furnace was further investigated. © 2025 Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd.

关键词： Chemical industry

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：