检索结果-内蒙古大学图书馆

Defect-Rich,Candied Haws-Shaped AuPtNi Alloy Nanostructures for Highly Efficient Electrocatalysis

CCS Chemistry 2020年第1期2卷 24-30页

作者： Xiaoya Cui Zhicheng Zhang Yue Gong Faisal Saleem Bo Chen Yonghua Du Zhuangchai Lai Nailiang Yang Bing Li Lin Gu Hua Zhang Department of Chemistry City University of Hong KongHong KongChina Center for Programmable Materials School of Materials Science and EngineeringNanyang Technological UniversitySingapore 639798Singapore Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190ChinaSchool of Physical SciencesUniversity of Chinese Academy of SciencesBeijing 100049China National Synchrotron Light Source II Brookhaven National LaboratoryUpton 11973NYUSA State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of Sciences Beijing 100190China Institute of Materials Research and Engineering(IMRE) A*STAR(Agency for ScienceTechnology and Research)Singapore 138634Singapore

The rational design and synthesis of multimetallic nanostructures(NSs)with rich defects are of significant importance for their diverse applications,including their promising usage as high-efficiency catalysts for alcohol oxidation reaction as a fuel ***,we report the synthesis of defect-rich,candied haws-shaped AuPtNi NSs using presynthesized gold(Au)nanowires as *** ternary AuPtNi NSs possess rich defects such as twins,stacking faults,and atomic ***,the AuPtNi NSs exhibited excellent mass and specific activities toward methanol and ethanol oxidation reactions under acidic *** current work paves the way for the rational design and controlled synthesis of defect-rich multimetallic NSs to boost their performances in catalytic reactions.

关键词： noble metal alloy multimetallic nanostructure defect electrocatalysis

来源：评论

学校读者我要写书评

暂无评论

Light-Responsive Supramolecular Liquid-Crystalline Metallacycle for Orthogonal Multimode Photopatterning

引用

Angewandte Chemie 2023年第4期136卷

作者： Dr. Yi-Xiong Hu Dr. Xingtian Hao Dan Wang Zi-Cheng Zhang Prof. Dr. Haitao Sun Dr. Xing-Dong Xu Prof. Dr. Xiaolin Xie Prof. Dr. Xueliang Shi Prof. Dr. Haiyan Peng Prof. Dr. Hai-Bo Yang Prof. Dr. Lin Xu State Key Laboratory of Petroleum Molecular and Process Engineering Shanghai Key Laboratory of Green Chemistry and Chemical Processes Shanghai Frontiers Science Center of Molecule Intelligent Syntheses School of Chemistry and Molecular Engineering East China Normal University 3663 N. Zhongshan Road Shanghai 200062 P. R. China State Key Laboratory of Materials Processing and Die & Mould Technology and MOE Key Laboratory of Materials Chemistry for Energy Conversion and Storage School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Wuhan 430074 P. R. China State Key Laboratory of Precision Spectroscopy East China Normal University Shanghai 200062 P. R. China Key Laboratory of Special Functional Aggregated Materials of Ministry of Education School of Chemistry and Chemical Engineering National Engineering Research Center for Colloidal Materials Shandong University Jinan Shandong 250100 P. R. China

The development of multimode photopatterning systems based on supramolecular coordination complexes (SCCs) is considerably attractive in supramolecular chemistry and materials science, because SCCs can serve as promising platforms for the incorporation of multiple functional building blocks. Herein, we report a light-responsive liquid-crystalline metallacycle that is constructed by coordination-driven self-assembly. By exploiting its fascinating liquid crystal features, bright emission properties, and facile photocyclization capability, a unique system with spatially-controlled fluorescence-resonance energy transfer (FRET) is built through the introduction of a photochromic spiropyran derivative, which led to the realization of the first example of a liquid-crystalline metallacycle for orthogonal photopatterning in three-modes, namely holography, fluorescence, and photochromism.

关键词： Liquid Crystal Metallacycle Multimode Photopatterning Supramolecular Chemistry Supramolecular Coordination Complexs

来源：评论

学校读者我要写书评

暂无评论

Dual interface engineering of sandwich core-shelled ZnO@CuO@ZnO heterostructure with rich oxygen vacancy for efficient CO 2 hydrogenation to methanol

引用

Applied Surface Science 2025年 708卷

作者： Xiaoguang San Yingwei Yue Quan Jin Beibei Dai Qingxiang Ma Fuqiang Yu Lei Zhang Jian Qi Dan Meng College of Chemical Engineering Shenyang University of Chemical Technology Shenyang 110142 PR China Key Laboratory of Automobile Materials (Ministry of Education) School of Materials Science and Engineering Jilin University Changchun 130022 PR China College of Chemistry and Chemical Engineering Ningxia University Ningxia 750021 PR China Research Institute of Chemical Advanced Materials Shenyang Research Institute of Chemical Industry Co. Ltd Shenyang 110021 PR China State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 PR China School of Chemical Engineering University of Chinese Academy of Sciences Beijing 100049 PR China

In order to overcome the problems of insufficient interface contact and scarce active sites in traditional Cu/ZnO based catalysts, as well as poor performance in CO 2 hydrogenation to methanol under low temperature and low pressure conditions, this work employs an interfacial and defect synergistic regulation strategy to design a “sandwich” structured ZnO@CuO@ZnO core-shelled catalyst. This catalyst features ZnO as both the core and shell layers, with CuO as the intermediate layer. After reduction, it forms a unique dual Cu-ZnO interfacial system, maximizing Cu-ZnO contact interfaces, enhancing the electronic synergistic effect of Cu-ZnO. Simultaneously, the ZnO layers are enriched with oxygen vacancy defects, serving as active sites for CO 2 adsorption and activation. Under mild conditions (220 °C, 2.0 MPa), the catalyst achieves a CO 2 conversion rate of 14.4 %, methanol selectivity of 82.1 %, and a remarkable methanol space–time yield (STY) of 405.3 g MeOH kg cat −1 h −1 . The main reason is attributed to the fact that the dual-interface structure optimizes the electronic state of Cu, facilitating H 2 dissociation and intermediate hydrogenation, while oxygen vacancies stabilize key intermediates and lower the reaction energy barrier. These features’ synergy enables efficient CO 2 hydrogenation to methanol conversion, offering a novel strategy for high-performance dual-interface core-shelled catalysts.

关键词： Reaction intermediates

来源：评论

学校读者我要写书评

暂无评论

Carbon Dots Derived from Facile Tailoring of Shaerhu Lignite as a Novel Fluorescence Sensor with High-Selectivity and Sensitivity for Cu2+Detection

引用

ChemistrySelect 2020年第39期5卷 12125-12130页

作者： Dr. Chong Shi Prof. Dr. Xian-Yong Wei Dr. Fang-Jing Liu Prof. Dr. Zhi-Min Zong Key Laboratory of Coal Processing and Efficient Utilization Ministry of Education China University of Mining & Technology Xuzhou 221116 Jiangsu China State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering Ningxia University Yinchuan 750021 Ningxia China Laboratory of Coal Clean Conversion & Chemical Engineering Process College of Chemistry and Chemical Engineering Xinjiang University Urumqi 830046 Xinjiang Uyghur Autonomous Region China

This study aims to find an appropriate method to produce fluorescent carbon dots (FCDs) from a low-rank coal, understand the fluorescence mechanism, and explore the application prospect of the FCDs. We reported a mild, green, and cheap top-down strategy to make the FCDs by oxidizing Shaerhu lignite (SL) with H 2 O 2 , which could accelerate post-processing and avoid the release of highly toxic gases. Our approach shows a great potential for the large-scale production of FCDs using a lignite as the feedstock. SL-derived FCDs (SLDFCDs) exhibit different emission modes, in which the short wavelength emission intensity was significantly enhanced by partial reduction. Evolution of the surface states and the analysis of electronic structure show that different fluorescence centers, domains and surface defects, and nanosized sp 2 carbon could result in different emission characteristics of the SLDFCDs. The size of SLDFCDs also affects luminescence. The reduced SLDFCDs (RSLDFCDs) can be used as an efficient label-free fluorescent sensing material to detect Cu(II) ions with a low detection limit of 2.0 nM, which shows their great potential as sensors in a complex real water environment. This study provides an alternative way of directional lignite utilization for fabricating carbon materials. We also found a better way out for lignite utilization, which could lead to the development of a low cost sensor using lignites as the precursor.

关键词： Lignite Luminescence Fluorescent carbon dots Quantum yield Sensor Cu2+

来源：评论

学校读者我要写书评

暂无评论

Heterostructure engineering of hollow core-shelled LDH@NP as advanced electrode for high-performance supercapacitor

引用

Fuel 2025年 401卷

作者： Xue Kang Panpan Li Mingquan Cheng Hui Gao Si Shen Xiaoliang Wang Tao Wang Jian Qi Department of Chemical and Materials Engineering Lyuliang University Lvliang 033000 PR China College of Mining College of Materials Science and Engineering Liaoning Technical University Fuxin 123000 PR China College of Mechanical and Electrical Engineering Beijing University of Chemical Technology Beijing 100029 PR China State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 PR China School of Chemical Engineering University of Chinese Academy of Sciences Beijing 100049 PR China

The synthesis of hollow structures frequently results in an enhanced specific capacity of electrode materials. Nonetheless, it remains challenging to ascertain whether this enhancement is due to the decreased mass of the active material or the inherent advantages of the hollow structure design. Consequently, augmenting the specific capacity while simultaneously increasing the electrode material’s mass load presents a significant challenge. In this investigation, we developed a composite material characterized by a hollow sheet-like core and a nanoparticle shell, designed to compensate for the mass loss associated with the hollow structure and to enhance electrochemical performance through a heterostructure. The boomerang-shaped hollow nickel–cobalt layered double hydroxide@nickel–cobalt phosphide composite(LDH@NP) achieved a mass density of 6.97 mg per square centimeter and a specific capacity of 2102 F/g (14714 mF/cm 2 ) at the current density level of 1 A/g. The fabricated nickel–cobalt layered double hydroxide@nickel–cobalt phosphide//activated carbon (LDH@NP//AC) asymmetric supercapacitor exhibited a specific energy of 52.25 Wh/kg with a corresponding power density of 825 W/kg, while maintaining 87.91 % capacitance retention after 10,000 charge–discharge cycles. The design of the hollow core-shelled heterostructure facilitates increased channels and active points for the movement of ions and electrons, reduces resistance to ion movement, and enhances the charge transfer rate of the electrode material, thus improving the supercapacitor’s performance in electrochemical terms. Furthermore, the cavities within the hollow core-shelled heterostructure effectively accommodate volume fluctuations during charging and discharging cycles, thus preventing structural degradation of the electrode material. Concurrently, robust interfacial interactions between the various components of the heterostructure contribute to the electrode material’s structural stability, thereby imp

关键词： Electrodeposition Heterostructure Hollow core–shell LDH@NP Supercapacitor

来源：评论

学校读者我要写书评

暂无评论

Ordered mesoporous NiFe_2O_4 with ultrathin framework for low-ppb toluene sensing

引用

Science Bulletin 2018年第3期63卷 187-193页

作者： Xiaoyong Lai Kun Cao Guoxin Shen Ping Xue Dan Wang Fang Hu Jianli Zhang Qingfeng Yang Xiaozhong Wang State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering School of Chemistry and Chemical Engineering Ningxia University Yinchuan750021 China State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China School of Materials Science and Engineering Shenyang University of Technology Shenyang 110870 China

Highly sensitive and selective detection against specific target gases, especially at low-ppb （part per bil- lion） level, remain a great number of challenges in gas sensor applications. In this paper, we first present an ordered mesoporous NiFe204 for highly sensitive and selective detection against low-ppb toluene. A series of mesoporous NiFe204 materials were synthesized by templating from mesoporous silica KIT-6 and its framework thickness was reduced from 8.5 to 5 nm by varying the pore size of KIT-6 from 9.4 to 5.6 nm, accompanied with the increase of the specific surface area from 134 to 216 m^2 g^-1. The ordered mesoporous NiFe2O4 with both ultrathin framework of 5 nm and large specific surface area of up to 216 m^2 g^-1 exhibits a highest response （Rgas/Ralr-1 = 77.3） toward 1,000 ppb toluene at 230℃ and is nearly 7.3 and 76.7 times higher than those for the NiFe204 replica with thick framework and its bulk counter- part respectively, which also possesses a quite low limit of detection （〈2 ppb）, and good selectivity.

关键词： Mesoporous material NiFe2O4 Gas sensing Low-ppb toluene

来源：评论

学校读者我要写书评

暂无评论

Rücktitelbild: Light-Responsive Supramolecular Liquid-Crystalline Metallacycle for Orthogonal Multimode Photopatterning (Angew. Chem. 4/2024)

引用

Angewandte Chemie 2023年第4期136卷

来源：评论

学校读者我要写书评

暂无评论

Self-Assembled Dipeptide Aerogels with Tunable Wettability

引用

Advanced Materials 2020年第29期132卷 12030-12034页

作者： Li, Xianbao Li, Qi Fei, Jinbo Jia, Yi Xue, Huimin Zhao, Jie Li, Junbai CAS Key Lab of Colloid Interface and Chemical Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing100190 China University of Chinese Academy of Sciences Beijing100049 China State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China

Constructing supramolecular materials with tunable properties and functions is a great challenge due to the complex competition between multiple assembly pathways. Herein, we report that dipeptides can self-assemble into aerogels with entirely different surface wettability through precisely controlling the assembly pathways. Charged groups or aromatic residues are selectively exposed on the surface of their nanoscale building blocks which results either in a superhydrophilic or highly hydrophobic surface. With this special property, single component dipeptide aerogels can play diverse roles in medical care applications. This study suggests great promise in the synthesis of supramolecular materials with different targeted functions from the same molecular unit. © 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

关键词： Wetting

来源：评论

学校读者我要写书评

暂无评论

Delivery systems for theranostics in neurodegenerative diseases

引用

Nano Research 2018年第10期11卷 5535-5555页

作者： Yan Li Ruiyuan Liu Weihong Ji Yanhui Li Linying Liu Xin Zhang State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China

Neurodegenerative diseases are characterized by progressive nervous system dysfunction, which affects over 90,000 people every year. Although numerous contrast agents and therapeutic drugs are available for the diagnosis and therapy of neurodegenerative diseases, there are several limitations to their application. Particularly, these contrast agents and drugs are restricted from entering into the brain because of the blood-brain barrier, which represents a major bottleneck to efficacious and safe theranostics of neurodegenerative diseases. Nanoparticles can offer impressive improvement in the theranostics of neurodegenerative diseases, as they can effectively deliver contrast agents and drugs to target sites in the central nervous system. In this review, we describe various delivery systems, including lipid nanoparticles, polymeric nanoparticles, inorganic nanoparticles, and exosomes useful for the theranostics of neurodegenerative diseases. Finally, we outline current challenges and our perspectives on the development of delivery systems for theranostics of neurodegenerative diseases.

关键词： neurodegenerative diseases theranostics blood-brain barrier delivery systems

来源：评论

学校读者我要写书评

暂无评论

Impact of the vehicle lightweighting and electrification on the trend of carbon emissions from automotive materials

引用

Journal of Cleaner Production 2025年 513卷

作者： Shen, Jialin Zhang, Qi Tian, Shuoshuo State Environmental Protection Key Laboratory of Eco-Industry Northeastern University Liaoning Shenyang110819 China Engineering Research Center of Ministry of Education for Frontier Technologies of Low-Carbon Steelmaking Liaoning Shenyang110819 China Liaoning Province Engineering Research Center for Energy Saving and Green Low Carbon Technologies in Process Industry Liaoning Shenyang110819 China

Vehicle lightweighting and electrification are turning into absolutely necessary trends in the automotive industry's pursuit of carbon neutrality, which will have a significant effect on the demand for automotive steel and aluminum as well as the CO2 emissions. This research analyzes China's vehicle ownership trends, revealing an S-shaped curve. Total vehicle ownership is projected to peak in 2047 at 494.57 million vehicles, followed by a decline to 468.41 million vehicles by 2060. Using dynamic material flow analysis, this research predicts vehicle production and vehicle steel and aluminum productions under the scenarios of baseline, decarbonization, and carbon neutrality. In the baseline, decarbonization, and carbon neutrality scenarios, total production of automotive steel and aluminum initially increases and then decreases. By 2060, the production of automotive steel and aluminum totals 2.44 million tons and 1.26 million tons in carbon neutrality scenario, respectively. This research models CO2 emissions from automotive steel and aluminum in vehicle and fuel cycles. In 2060, emissions fall to 4.10 million tons in the vehicle cycle and 45.62 million tons in the fuel cycle under the carbon neutrality scenario, representing 92.07 %–97.64 % reductions compared to the peak values. Furthermore, in an effort to promote the vehicle lightweighting and electrification, the break-even points for these actions are investigated to shed light on how lightweighting and electrification affect CO2 emissions of automotive steel and aluminum from a holistic standpoint. This research also provides targeted strategic pathways for China's low-carbon automotive transition. © 2025 Elsevier Ltd

关键词： Electric utilities

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：