检索结果-南通市图书馆

2D MOF Nanoflake-Assembled Spherical Microstructures for Enhanced Supercapacitor and Electrocatalysis Performances

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2017年第4期9卷 62-72页

作者： Huicong Xia Jianan Zhang Zhao Yang Shiyu Guo Shihui Guo Qun Xu College of Materials Science and Engineering Zhengzhou University Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Nankai University State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin University

metal–organic frameworks(MOFs) are of great interest as potential electrochemically active materials.However, few studies have been conducted into understanding whether control of the shape and components of MOFs can optimize their electrochemical performances due to the rational realization of their shapes. Component control of MOFs remains a significant challenge. Herein, we demonstrate a solvothermal method to realize nanostructure engineering of 2D nanoflake MOFs. The hollow structures withNi/Co-and Ni-MOF(denoted as Ni/Co-MOF nanoflakes and Ni-MOF nanoflakes) were assembled for their electrochemical performance optimizations in supercapacitors and in the oxygen reduction reaction(ORR). As a result, the Ni/CoMOF nanoflakes exhibited remarkably enhanced performance with a specific capacitance of 530.4 F g^(-1)at 0.5 A g^(-1)in1 M LiO H aqueous solution, much higher than that of NiMOF(306.8 F g^(-1)) and ZIF-67(168.3 F g^(-1)), a good rate capability, and a robust cycling performance with no capacity fading after 2000 cycles. Ni/Co-MOF nanoflakes also showed improved electrocatalytic performance for the ORR compared to Ni-MOF and ZIF-67. The present work highlights the significant role of tuning 2D nanoflake ensembles of Ni/Co-MOF in accelerating electron and charge transportation for optimizing energy storage and conversion devices.

关键词： metal–organic frameworks Nanoflakes Spherical microstructure Supercapacitor Oxygen reduction reaction

metal–organic Framework-Based Sensors for Environmental Contaminant Sensing

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2018年第4期10卷 92-110页

作者： Xian Fang Boyang Zong Shun Mao Biomedical Multidisciplinary Innovation Research Institute Shanghai East Hospital State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai Institute of Pollution Control and Ecological Security

Increasing demand for timely and accurate environmental pollution monitoring and control requires new sensing techniques with outstanding performance, i.e.,high sensitivity, high selectivity, and reliability. metal–organic frameworks(MOFs), also known as porous coordination polymers, are a fascinating class of highly ordered crystalline coordination polymers formed by the coordination of metal ions/clusters and organic bridging linkers/ligands. Owing to their unique structures and properties,i.e., high surface area, tailorable pore size, high density of active sites, and high catalytic activity, various MOF-based sensing platforms have been reported for environmental contaminant detection including anions, heavy metal ions,organic compounds, and gases. In this review, recent progress in MOF-based environmental sensors is introduced with a focus on optical, electrochemical, and field-effect transistor sensors. The sensors have shown unique and promising performance in water and gas contaminant sensing. Moreover, by incorporation with other functional materials, MOF-based composites can greatly improve the sensor performance. The current limitations and future directions of MOF-based sensors are also discussed.

关键词： metal–organic frameworks Environmental contaminant Optical sensor Electrochemical sensor Field-effect transistor sensor Micro- and nanostructure

Rational Design of MOF-Based Materials for Next-Generation Rechargeable Batteries

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2021年第12期13卷 264-300页

作者： Zhengqing Ye Ying Jiang Li Li Feng Wu Renjie Chen Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081People’s Republic of China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081People’s Republic of China Advanced Technology Research Institute Beijing Institute of TechnologyJinan 250300People’s Republic of China

metal–organic framework(MOF)-based materials with high porosity,tunable compositions,diverse structures,and versatile functionalities provide great scope for next-generation rechargeable battery applications.Herein,this review summarizes recent advances in pristine MOFs,MOF composites,MOF derivatives,and MOF composite derivatives for high-performance sodium-ion batteries,potassiumion batteries,Zn-ion batteries,lithium–sulfur batteries,lithium–oxygen batteries,and Zn–air batteries in which the unique roles of MOFs as electrodes,separators,and even electrolyte are highlighted.Furthermore,through the discussion of MOFbased materials in each battery system,the key principles for controllable synthesis of diverse MOF-based materials and electrochemical performance improvement mechanisms are discussed in detail.Finally,the major challenges and perspectives of MOFs are also proposed for next-generation battery applications.

关键词： metal–organic frameworks MOF composites MOF derivatives MOF composite derivatives Batteries

Sustained‑Release Nanocapsules Enable Long‑Lasting Stabilization of Li Anode for Practical Li‑metal Batteries

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2020年第12期12卷 239-250页

作者： Qianqian Liu Yifei Xu Jianghao Wang Bo Zhao Zijian Li Hao Bin Wu School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027People’s Republic of China

A robust solid-electrolyte interphase(SEI)enabled by electrolyte additive is a promising approach to stabilize Li anode and improve Li cycling efficiency.However,the self-sacrificial nature of SEI forming additives limits their capability to stabilize Li anode for long-term cycling.Herein,we demonstrate nanocapsules made from metal–organic frameworks for sustained release of LiNO3 as surface passivation additive in commercial carbonate-based electrolyte.The nanocapsules can offer over 10 times more LiNO3 than the solubility of LiNO3.Continuous supply of LiNO3 by nanocapsules forms a nitride-rich SEI layer on Li anode and persistently remedies SEI during prolonged cycling.As a result,lifespan of thin Li anode in 50μm,which experiences drastic volume change and repeated SEI formation during cycling,has been notably improved.By pairing with an industry-level thick LiCoO2 cathode,practical Li-metal full cell demonstrates a remarkable capacity retention of 90%after 240 cycles,in contrast to fast capacity drop after 60 cycles in LiNO3 saturated electrolyte.

关键词： metal–organic frameworks LiNO3 Nanocapsules Lithium-metal anode Lithium-metal batteries

Two-Dimension(2D) Cu-MOFs/aptamer Nanoprobe for In Situ ATP Imaging in Living Cells

在线全文

学校读者我要写书评

暂无评论

Journal of Analysis and Testing 2021年第2期5卷 165-173页

作者： Xinxin Shi Hui Xu Yanan Wu Yanmin Zhao Hong-Min Meng Zhaohui Li Lingbo Qu College of Chemistry Green Catalysis CenterHenan Joint International Research Laboratory of Green Construction of Functional Molecules and Their Bioanalytical ApplicationsZhengzhou Key Laboratory of Functional Nanomaterial and Medical TheranosticZhengzhou UniversityZhengzhou 450001China

Monitoring the intracellular adenosine triphosphate(ATP)level is vital for elaborating its function in physiological states.However,the intracellular fluorescence sensing of ATP using ATP aptamer remains difficult owing to non-target displacement and susceptibility toward enzymatic degradation.Herein,by combining 2D Cu-MOF nanosheets and FAM labelled ATP aptamer,we developed a fluorescent Cu-MOFs/aptamer nanoprobe to image and sense intracellular ATP.This nanoprobe reveals a very low fluorescence intensity because of the excellent quenching efficiency of 2D Cu-MOF nanosheets.The presence of ATP was capable to dissociate the FAM-aptamer from Cu-MOF nanosheets and resulted in an intense fluorescence signal.The Cu-MOFs/aptamer nanoprobe enables highly sensitive and selective measurement of ATP level ranging from 10μM to 800μM with a detection limit of 4.24μM.This nanosystem also further realized in situ detection of the undulation of ATP trigged by drug stimulation,depending on the selective delivery of the nanoprobe and attractive capability of resisting nonspecific displacement.The constructed nanoprobe may supply a potential platform in clinical diagnostics and biological studies.

关键词： metal–organic frameworks Aptamer ATP Bio-sensing Cell imaging

Ultrathin two-dimensional metal–organic framework nanosheets for efficient electrochemical CO_(2) reduction

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2021年第6期30卷 627-631,I0015页

作者： Lu Ye Xuyang Chen Yan Gao Xin Ding Jungang Hou Shuyan Cao State Key Laboratory of Fine Chemicals Institute of Artificial PhotosynthesisDUT-KTH Joint Education and Research Center on Molecular DevicesDalian University of Technology(DUT)Dalian 116024LiaoningChina Key Laboratory for Fuel Cell Technology of Guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510641GuangdongChina Ningbo Institute of Dalian University of Technology Ningbo 315000ZhejiangChina College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071ShandongChina

Electrochemical CO_(2) reduction into CO or high-value products is regarded as a feasible pathway for energy conversion,which has attracted universal attention in recent years [1-3].However,the reduction of CO_(2) molecule is a thermodynamically uphill process,which involves multiple elemental steps and the competition of hydrogen evolution reaction(HER) in aqueous solution.

关键词： metal–organic frameworks 2D Nanosheets CO_(2)reduction Electrocatalysis

Defect engineering of Mn-based MOFs with rod-shaped building unitsbyorganic linker fragmentation

在线全文

学校读者我要写书评

暂无评论

Defect engineering of Mn-based MOFs with rod-shaped building...

A new solvent-directed 3D Cd（Ⅱ）–MOFs displaying the unique properties of luminescence

中国化学会第八届全国配位化学会议

作者： Doufeng Wu Wenqing Yan Huoshu Xu Erpan Zhang Qiaowei Li Department of Chemistry and iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)Fudan University College of Materials and Environmental Engineering Hangzhou Dianzi University

Formation of defects with controlled concentration in Mn-MOF-74[Mn(DOBDC),DOBDC:2,5-dioxido-1,4-benzenedicarboxylic acid]and a newly synthesized metal–organic framework Mn(BDC-O)(BDCOH)(FDM-21,BDC-OH:2-hydroxyterephthalic acid)were systematically investigated by employing fragmented linkers with reduced coordination numbers towards Mn(II)during the synthesis.The defect engineering has resulted in missing functional groups on the framework backbone,as well as potential open metal sites in the inorganic secondary building units.The chemical form and amount of coordinating groups(–OH and/or–COOH)in the fragmented linkers have impacted the defects density of the framework significantly.Furthermore,surface area enhancement was observed in the defected Mn-MOF-74 doped with BDC-OH,compared to the defect-free Mn-MOF-74.

关键词： metal–organic frameworks Defects Rod-shaped building units Crystal engineering Linker fragments

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

A new solvent-directed 3D Cd（Ⅱ）–MOFs displaying the uniq...

Tb(Ⅲ)-functionalized Zn-MOFas fluorescent probe for selective sensing Cu2+ions and reversibledetecting PO43- ions

中国化学会第九届全国无机化学学术会议

作者： Jiang Li Yao-Yu Wang College of Chemistry ＆ Materials Science Northwest University

The rational design and assembly of metal–organic frameworks（MOFs）or porous coordination polymers（PCPs）,as one of the most promising classes of materials,1 have attracted remarkable attention not only ascribed to their intriguing variety of structural topologies but also due to their potential applications in diverse areas of catalysis,magnetism,ion exchange,luminescence and gas adsorption.2 Hence,With a flexible aromatic ligand,1,3-di（3’,5’-dicarboxylphenyl）benzene)（H4DDCPB）,a luminescent metal-organic frameworks,{[Zn2（DDCPB）·2DMA]·DMA}n（1）,have been synthesized under solvothermal condition.The luminescent properties of compound have been investigated.Compound 1 crystallizes in chiral space group P212121,each[Zn2（κ-O）6]12+cluster is regarded as 4-connected node which is linked by four DDCPB4-,and every DDCPB4-acts as a 4-connected bridging linker（Fig.3b）.2 can be considered as a rare（4,4）-connected bsn net with the point symbol of{66}（Fig.3c）.Therefore,2 is one of the few known MOFs with bsn topology.It is particular interest to note that right-hand 21 helices along the c-axis with a pitch of 15.59are constructed from[Zn2（κ-O）6]12+clusters and DDCPB4-（Fig.2b）.The luminescent properties of compound 1 were examined in solid state,and both of them show strong luminescent with the emission maximum at 350 nm upon excitation at 300 nm.

关键词： metal–organic frameworks Luminescence

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Tb(Ⅲ)-functionalized Zn-MOFas fluorescent probe for selecti...