Highly stable and ultrasensitive chlorogenic acid sensor based on metal–organic frameworks/titanium dioxide nanocomposites

The Analyst ◽  
2016 ◽  
Vol 141 (15) ◽  
pp. 4647-4653 ◽  
Author(s):  
Yang Wang ◽  
Huanhuan Chen ◽  
Xiaoya Hu ◽  
Hai Yu
Keyword(s):  
Titanium Dioxide ◽  
Chlorogenic Acid ◽  
Electrode Materials ◽  
Metal Organic Frameworks ◽  
Improved Stability ◽  
Metal Organic ◽  
Acid Determination

Metal–organic frameworks/titanium dioxide nanocomposites were utilized as novel electrode materials for ultrasensitive chlorogenic acid determination with improved stability.

scholarly journals Insights into the electric double-layer capacitance of two-dimensional electrically conductive metal-organic frameworks

2021 ◽  
Author(s):  
Jamie W. Gittins ◽  
Chloe J. Balhatchet ◽  
Yuan Chen ◽  
Cheng Liu ◽  
David G. Madden ◽  
...  
Keyword(s):  
Double Layer ◽  
Electric Double Layer ◽  
Electrode Materials ◽  
Metal Organic Frameworks ◽  
Significant Finding ◽  
Two Dimensional ◽  
Electrically Conductive ◽  
Capacitive Performance ◽  
Metal Organic ◽  
Organic Linker

Two-dimensional electrically conductive metal-organic frameworks (MOFs) have emerged as promising model electrodes for use in electric double-layer capacitors (EDLCs). However, a number of fundamental questions about the behaviour of this class of materials in EDLCs remain unanswered, including the effect of the identity of the metal node and organic linker molecule on capacitive performance and the limitations of current conductive MOFs in these devices relative to traditional activated carbon electrode materials. Herein, we address both these questions via a detailed study of the capacitive performance of the framework Cu<sub>3</sub>(HHTP)<sub>2</sub> (HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene) with an acetonitrile-based electrolyte, finding a specific capacitance of 110 – 114 F g<sup>−1</sup> at current densities of 0.04 – 0.05 A g<sup>−1</sup> and a modest rate capability. By, directly comparing its performance with the previously reported analogue, Ni<sub>3</sub>(HITP)<sub>2</sub> (HITP = 2,3,6,7,10,11-hexaiminotriphenylene), we illustrate that capacitive performance is largely independent of the identity of the metal node and organic linker molecule in these nearly isostructural MOFs. Importantly, this result suggests that EDLC performance in general is uniquely defined by the 3D structure of the electrodes and the electrolyte, a significant finding not demonstrated using traditional electrode materials. Finally, we probe the limitations of Cu<sub>3</sub>(HHTP)<sub>2</sub> in EDLCs, finding a limited cell voltage window of 1.3 V and only a modest capacitance retention of 81 % over 30,000 cycles, both significantly lower than state-of-the-art porous carbons. These important insights will aid the design of future conductive MOFs with greater EDLC performances.

Metal–organic framework derived petal-like Co3O4@CoNi2S4 hybrid on carbon cloth with enhanced performance for supercapacitors

2020 ◽  
Vol 7 (6) ◽  
pp. 1428-1436 ◽  
Author(s):  
Dandan Han ◽  
Jinhe Wei ◽  
Yuan Zhao ◽  
Ye Shen ◽  
Yifan Pan ◽  
...  
Keyword(s):  
Electrode Materials ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Core Shell ◽  
Carbon Cloth ◽  
Step Method ◽  
Metal Organic ◽  
Organic Framework

Starting from 2D Co-based metal-organic frameworks, novel petal-like core-shell Co3O4@CoNi2S4 nanowall arrays are synthesized on carbon cloth using a facile two-step method and investigated as promising electrode materials for supercapacitors.

scholarly journals The application of metal-organic frameworks in electrode materials for lithium–ion and lithium–sulfur batteries

2019 ◽  
Vol 6 (7) ◽  
pp. 190634 ◽  
Author(s):  
Ji Ping Zhu ◽  
Xiu Hao Wang ◽  
Xiu Xiu Zuo
Keyword(s):  
Electrode Materials ◽  
Gas Adsorption ◽  
Metal Organic Frameworks ◽  
Lithium Ion ◽  
Drug Carriers ◽  
Large Specific Surface Area ◽  
Lithium Sulfur Batteries ◽  
Battery Electrode ◽  
Metal Organic ◽  
Lithium Sulfur

Metal-organic frameworks (MOFs) have gained increased attention due to their unique features, including tunable pore sizes, controllable structures and a large specific surface area. In addition to their application in gas adsorption and separation, hydrogen storage, optics, magnetism and organic drug carriers, MOFs also can be used in batteries and supercapacitors which have attracted the researcher's attention. Based on recent studies, this review describes the latest developments about MOFs as battery electrode materials which are used in lithium–ion and lithium–sulfur batteries.

Electrochemical performance of FexMn1−x-based metal–organic frameworks as electrode materials for supercapacitors

2018 ◽  
Vol 29 (23) ◽  
pp. 19819-19824 ◽  
Author(s):  
Huan Wang ◽  
Zhideng Huang ◽  
Hongyang Zhao ◽  
Fang Zhang ◽  
Chuanbo Xu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Electrode Materials ◽  
Metal Organic Frameworks ◽  
Metal Organic

Mixed-metallic MOF based electrode materials for high performance hybrid supercapacitors

2017 ◽  
Vol 5 (3) ◽  
pp. 1094-1102 ◽  
Author(s):  
Yang Jiao ◽  
Jian Pei ◽  
Dahong Chen ◽  
Chunshuang Yan ◽  
Yongyuan Hu ◽  
...  
Keyword(s):  
Energy Storage ◽  
Electrode Material ◽  
High Performance ◽  
Electrode Materials ◽  
Metal Organic Frameworks ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Hybrid Supercapacitors ◽  
Metal Organic

Metal–organic frameworks (MOFs) have obtained increasing attention as a kind of novel electrode material for energy storage devices.

scholarly journals Nanosized Monometallic Selenides Heterostructures Implanted into Metal Organic Frameworks-Derived Carbon for Efficient Lithium Storage

2021 ◽  
Author(s):  
Zhichao Liu ◽  
Dong Wang ◽  
Hongliang Mu ◽  
Chunjie Zhang ◽  
Liqing Wu ◽  
...  
Keyword(s):  
Active Sites ◽  
Electrode Materials ◽  
Metal Organic Frameworks ◽  
Rate Capability ◽  
Ex Situ ◽  
Lithium Storage ◽  
Two Phase ◽  
Related Field ◽  
Transfer Resistance ◽  
Metal Organic

Abstract Two-phase heterostructure with rich phase boundaries holds great potential in engineering advanced electrode materials. However, current heterostructures are largely generated by introducing exotic cations or anions, complicating synthetic procedures and disturbing real insights into the intrinsic effect of heterostructure. Herein, nanosized monometallic selenides heterostructures are developed by precisely controlled selenylation of metal organic frameworks, which are implanted into in-situ formed carbon (NiSe/NiSe2@C, CoSe/CoSe2@C). The disordered atoms arrangement at two-phase boundary leads to the redistribution of interfacial charge and generation of lattice distortions, promoting easy adsorption and swift transfer of Li+, and providing extra active sites. As a proof of concept, the NiSe/NiSe2@C exhibits far surpassing lithium storage properties to single-phase counterparts (NiSe@C and NiSe2@C), including higher reversible capacity of 1015.5 mAh g− 1, better rate capability (500.8 mAh g− 1 at 4 A g− 1), and superior cyclic performance. As expected, the NiSe/NiSe2@C manifests lower charge transfer resistance, higher Li+ diffusion coefficient, and accelerated capacitive kinetics. Ex-situ X-ray diffraction, high-resolution transmission electron microscopy, and selected area electron diffraction combined with differential capacity versus voltage plots reveal multi-step redox mechanism of NiSe/NiSe2@C and the reason of conspicuous capacity enhancement. This work demonstrates the enormous potential of monometallic monoanionic heterostructure in energy-related field.

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