Co3O4Electrode Prepared by Using Metal-Organic Framework as a Host for Supercapacitors

Co3O4nanoparticles were prepared from cobalt nitrate that was accommodated in the pores of a metal-organic framework (MOF) ZIF-8 (Zn(MeIM)2, MeIM = 2-methylimidazole) by using a simple liquid-phase method. Analysis by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that the obtained Co3O4was composed of separate nanoparticles with a mean size of 30 nm. The obtained Co3O4nanoparticles exhibited superior electrochemical property. Co3O4electrode exhibited a maximum specific capacitance of 189.1 F g−1at the specific current of 0.2 A g−1. Meanwhile, the Co3O4electrode possessed the high specific capacitance retention ratio at the current density ranging from 0.2 to 1.0 A g−1, thereby indicating that Co3O4electrode suited high-rate charge/discharge.

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Hierarchically activated porous carbon derived from zinc-based fluorine containing metal-organic framework as extremely high specific capacitance and rate performance electrode material for advanced supercapacitors

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2021.01.109 ◽

2021 ◽

Vol 591 ◽

pp. 9-19 ◽

Cited By ~ 1

Author(s):

Sedahmed Osman ◽

Raja Arumugam Senthil ◽

Junqing Pan ◽

Lulu Chai ◽

Yanzhi Sun ◽

...

Keyword(s):

Specific Capacitance ◽

Electrode Material ◽

Porous Carbon ◽

Metal Organic Framework ◽

High Specific Capacitance ◽

Rate Performance ◽

Metal Organic ◽

Organic Framework

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Ultrathin Nanosheets-Assembled Nickel-Based Metal-Organic Framework Microflowers for Supercapacitor Application

Chemical Communications ◽

10.1039/d1cc04880e ◽

2022 ◽

Author(s):

Chong-Huan Wang ◽

Da-Wei Zhang ◽

Shude Liu ◽

Yusuke Yamauchi ◽

Fei-Bao Zhang ◽

...

Keyword(s):

Electrochemical Performance ◽

Specific Capacitance ◽

Electrode Material ◽

Metal Organic Framework ◽

Rate Capability ◽

High Specific Capacitance ◽

Supercapacitor Application ◽

Ultrathin Nanosheets ◽

Metal Organic ◽

Organic Framework

Herein, we propose a solvent-assisted approach for preparing Ni-MOF microflowers with high specific capacitance and excellent rate capability as an electrode material for supercapacitors. Such high electrochemical performance is attributed...

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Synthesis of Al-Based Metal-Organic Framework in Water With Caffeic Acid Ligand and NaOH as Linker Sources With Highly Efficient Anticancer Treatment

Frontiers in Chemistry ◽

10.3389/fchem.2021.784461 ◽

2021 ◽

Vol 9 ◽

Author(s):

Malihe Zeraati ◽

Abbas Rahdar ◽

Dora I. Medina ◽

Ghasem Sargazi

Keyword(s):

Electron Microscopy ◽

Green Synthesis ◽

Metal Organic Framework ◽

Cost Effective ◽

Spherical Particles ◽

Anticancer Properties ◽

Synthesis Route ◽

Anticancer Treatment ◽

Metal Organic ◽

Organic Framework

In this study, novel nanostructures of aluminum base metal-organic framework (Al-MOF) samples were synthesized using a sustainable, non-toxic, and cost-effective green synthesis route. Satureja hortensis extract was used as an effective source of linker for the development of the Al-MOF structures. The Fourier-transformed infrared (FTIR) spectrum confirmed the presence of characterization bonds related to the Al-MOF nanostructures synthesized by the green synthesis route. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses revealed that the sample synthesized by Na2-CA was composed of multilayers, although it was agglomerated, but it had dispersed and occurred in spherical particles, indicating active organic matter. N2 adsorption/desorption isotherms demonstrated the significant porosity of the Al-MOF samples that facilitate the high potential of these nanostructures in medical applications. The anticancer treatment of Al-MOF samples was performed with different concentrations using the MTT standard method with untreated cancer cells for 24 and 48 h periods. The results exhibited the significant anticancer properties of Al-MOF samples developed in this study when compared with other MOF samples. Thus, the development of a novel Al-MOF and its application as a natural linker can influence the anticancer treatment of the samples. According to the results, the products developed in this study can be used in more applications such as biosensors, catalysts, and novel adsorbents.

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Enhanced Water Stability and Photoresponsivity in Metal-Organic Framework (MOF): A Potential Tool to Combat Drug-resistant Bacteria

Scientific Reports ◽

10.1038/s41598-019-55542-8 ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 7

Author(s):

Saleh A. Ahmed ◽

Damayanti Bagchi ◽

Hanadi A. Katouah ◽

Md. Nur Hasan ◽

Hatem M. Altass ◽

...

Keyword(s):

Electron Microscopy ◽

Charge Transfer ◽

Metal Organic Framework ◽

Resistant Bacteria ◽

Ros Generation ◽

Water Stability ◽

Equal Proportion ◽

Electronic Band ◽

Metal Organic ◽

Organic Framework

AbstractIn this work, we have successfully synthesized a bimetallic (Zinc and Cobalt) Zeolitic Imidazolate Framework (Zn50Co50-ZIF), a class in a wider microporous Metal-Organic Framework (MOF) family. The synthesized nanostructures maintain both water stability like ZIF-8 (solely Zn containing) and charge transfer electronic band in the visible optical spectrum as ZIF-67 (solely Co containing). Crystal structure from XRD, high resolution transmission electron microscopy (HRTEM) followed by elemental mapping (EDAX) confirm structural stability and omnipresence of the metal atoms (Zn and Co) across the nanomaterial with equal proportion. Existence of charge transfer state consistent with ZIF67 and intact ultrafast excited state dynamics of the imidazolate moiety in both ZIF-8 and ZIF-67, is evidenced from steady state and time resolved optical spectroscopy. The thermal and aqueous stabilities of Zn50Co50-ZIF are found to be better than ZIF-67 but comparable to ZIF-8 as evidenced by solubility, scanning electron microscopy (SEM) and XRD studies of the material in water. We have evaluated the photoinduced ROS generation by the mixed ZIF employing dichloro-dihydro-fluorescein diacetate (DCFH-DA) assay. We have also explored the potentiality of the synthesized material for the alternate remediation of methicillin resistant Staphylococcus aureus (MRSA) infection through the photoinduced reactive oxygen species (ROS) generation and methylene blue (MB) degradation kinetics.

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Bottom‐Up Fabrication of 1D Cu‐based Conductive Metal–Organic Framework Nanowires as a High‐Rate Anode towards Efficient Lithium Storage

ChemSusChem ◽

10.1002/cssc.201902194 ◽

2019 ◽

Vol 12 (22) ◽

pp. 5051-5058 ◽

Cited By ~ 12

Author(s):

Lingzhi Guo ◽

Jinfeng Sun ◽

Wenheng Zhang ◽

Linrui Hou ◽

Longwei Liang ◽

...

Keyword(s):

Metal Organic Framework ◽

High Rate ◽

Lithium Storage ◽

Bottom Up ◽

Metal Organic ◽

Organic Framework

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Transmission electron microscopy studies of metal organic framework structures (MOFs)

Scientia Sinica Chimica ◽

10.1360/n032013-00056 ◽

2014 ◽

Vol 44 (2) ◽

pp. 229-235

Author(s):

DaLiang ZHANG ◽

LiangKui ZHU ◽

ShiLun QIU

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Metal Organic Framework ◽

Transmission Electron ◽

Metal Organic ◽

Organic Framework

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Highly Efficient Nanocarbon Coating Layer on the Nanostructured Copper Sulfide-Metal Organic Framework Derived Carbon for Advanced Sodium-Ion Battery Anode

Materials ◽

10.3390/ma12081324 ◽

2019 ◽

Vol 12 (8) ◽

pp. 1324 ◽

Cited By ~ 2

Author(s):

Chiwon Kang ◽

Yongwoo Lee ◽

Ilhwan Kim ◽

Seungmin Hyun ◽

Tae Hoon Lee ◽

...

Keyword(s):

Electron Microscopy ◽

Copper Sulfide ◽

Large Scale ◽

Metal Organic Framework ◽

Specific Capacity ◽

Chemical Properties ◽

Sodium Ion ◽

Physico Chemical ◽

Metal Organic ◽

Organic Framework

High theoretical capacity and low-cost copper sulfide (CuxS)-based anodes have gained great attention for advanced sodium-ion batteries (SIBs). However, their practical application may be hindered due to their unstable cycling performance and problems with the dissolution of sodium sulfides (NaxS) into electrolyte. Here, we employed metal organic framework (MOF-199) as a sacrificial template to fabricate nanoporous CuxS with a large surface area embedded in the MOF-derived carbon network (CuxS-C) through a two-step process of sulfurization and carbonization via H2S gas-assisted plasma-enhanced chemical vapor deposition (PECVD) processing. Subsequently, we uniformly coated a nanocarbon layer on the Cu1.8S-C through hydrothermal and subsequent annealing processes. The physico-chemical properties of the nanocarbon layer were revealed by the analytical techniques of high-resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDS), and scanning electron microscopy (SEM). We acquired a higher SIB performance (capacity retention (~93%) with a specific capacity of 372 mAh/g over 110 cycles) of the nanoporous Cu1.8S-C/C core/shell anode materials than that of pure Cu1.8S-C. This encouraging SIB performance is attributed to the key roles of a nanocarbon layer coated on the Cu1.8S-C to accommodate the volume variation of the Cu1.8S-C anode structure during cycling, enhance electrical conductivity and prevent the dissolution of NaxS into the electrolyte. With these physico-chemical and electrochemical properties, we ensure that the Cu1.8S-C/C structure will be a promising anode material for large-scale and advanced SIBs.

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