Characterization and properties of Zn/Co zeolitic imidazolate frameworks vs. ZIF-8 and ZIF-67

Zhou, Kui; Mousavi, Bibimaryam; Luo, Zixue; Phatanasri, Shophot; Chaemchuen, Somboon; Verpoort, Francis

doi:10.1039/c6ta07860e

Cited by 584 publications

(338 citation statements)

References 31 publications

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“…2 presents the SEM images of the three ZIFs. Large crystals (~1 μm) are formed under the hydrothermal process, which is similar to the previously reported samples [31,32]. The coexistence and homogeneous distribution of different elements in three ZIFs are proved in Fig.…”

Section: Materials Characterizationsupporting

confidence: 71%

Bimetallic zeolite imidazolate framework for enhanced lithium storage boosted by the redox participation of nitrogen atoms

Lou

Ning

et al. 2018

Sci. China Mater.

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In this work, a bimetallic zeolitic imidazolate framework (ZIF) CoZn-ZIF was synthesized via a facile solvothermal approach and applied in lithium-ion batteries. The as-prepared CoZn-ZIF shows a high reversible capacity of 605.8 mA h g −1 at a current density of 100 mA g −1 , far beyond the performance of the corresponding monometallic Co-ZIF-67 and Zn-ZIF-8. Ex-situ synchrotron soft X-ray absorption spectroscopy, X-ray diffraction, and electron paramagnetic resonance techniques were employed to explore the Li-storage mechanism. The superior performance of CoZn-ZIF over Co-ZIF-67 and Zn-ZIF-8 could be mainly attributed to lithiation and delithiation of nitrogen atoms, accompanied by the breakage and recoordination of metal nitrogen bond. Morever, a few metal nitrogen bonds without recoordination will lead to the amorphization of CoZn-ZIF and the formation of few nitrogen radicals.

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Section: Materials Characterizationsupporting

confidence: 71%

Bimetallic zeolite imidazolate framework for enhanced lithium storage boosted by the redox participation of nitrogen atoms

Lou

Ning

et al. 2018

Sci. China Mater.

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“…The crystal structure and phase composition of Co‐Cu/ZIF were characterized by X‐ray diffraction (XRD). Results showed the stronger peaks at 2θ = 7.35° and 12.8° corresponding to (011) and (112) planes indicating high crystallinity of synthesized Co‐Cu/ZIF and confirmed the crystalline phases of prepared ZIF (Figure ) …”

Section: Resultsmentioning

confidence: 56%

Co/Cu bimetallic ZIF as New heterogeneous catalyst for reduction of nitroarenes and dyes

Naghshbandi

Sansano

2020

Applied Organom Chemis

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Nowadays one of the great challenges is to design new bimetallic catalysts with enhanced catalytic activity, selectivity and recycling properties. In this work, the preparation of new Co/Cu bimetallic Zeolitic Imidazolate Framework (Co‐Cu/ZIF) as an efficient catalyst for the reduction of nitro compounds and organic dyes is described. Co‐Cu/ZIF was characterized with different techniques such as SEM, TEM, XRD, XPS, TGA, FT‐IR and UV–vis absorption indicating formation of entirely uniform cubic particles. Using this catalyst, structurally different aromatic nitro compounds were reduced efficiently to corresponding amines in excellent yields. Kinetic studies revealed that the reduction rates of nitrophenol isomers follow 3‐NP > 4‐NP > 2‐NP order. The catalytic activity of Co‐Cu/ZIF was further investigated in the reduction of organic dyes such as methyl orange (MO) and rhodamine B (RhB). This catalyst was recycled for at least ten runs in the reduction of 4‐nitrophenol without a noticeable decrease in activity and reused catalyst was characterized.

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“…MOFs show high synthetic flexibility because of possible bridging metal clusters and organic linkers . The type of metal ions or metal cluster in MOFs design greatly affects their topology, performance and physical–chemical properties in different applications …”

Section: Introductionmentioning

confidence: 99%

“…Zeolitic imidazolate frameworks (ZIFs), a sub‐class of MOFs synthesized by metallic nodes (e.g. Zn, Co) and thermally/chemically stable imidazole linkers with a large pore size, and large zeolitic topologies can be used as a favorable catalyst for polymerization . Only a few examples of ZIFs‐8 as a heterogeneous catalyst are cited in the literature.…”

Section: Introductionmentioning

confidence: 99%

Switching from linear to cyclic δ‐Polyvalerolactone synthesized via zeolitic imidazolate framework as a catalyst: A promising approach

Naz

Mousavi

Luo

et al. 2019

Applied Organom Chemis

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A series of spray dried zeolitic imidazolate frameworks (ZIFs = ZIF‐8, ZIF‐67, and Zn/Co‐ZIF) are used as a catalyst for the bulk ring‐opening polymerization of δ‐valerolactone without any co‐catalyst to generate polyvalerolactone. Interestingly, using the same catalyst under the same reaction conditions could manipulate the structure of the product polymer, and thus its physical properties. Thus, using a dried substrate leads to the formation of the cyclic polymer while a linear polymer was formed on using the commercially available substrate. An activated monomer mechanism has been suggested where the propagating zinc alkoxide undergoes an intramolecular transesterification to release cyclic or linear polyvalerolactone. The ROP of δ‐VL without drying shows that the polymeric zwitterions have little tendency to cyclize in the presence of moisture. At 140 °C, ZIF‐8 shows a superior catalytic activity resulting in the production of cyclic polyvalerolactone having a high molecular weight as compared to ZIF‐67 or Zn/Co‐ZIF due to the presence of highly active sites. The catalyst could be recycled and reused without any significant loss of catalytic activity.

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Characterization and properties of Zn/Co zeolitic imidazolate frameworks vs. ZIF-8 and ZIF-67

Abstract: A novel Zn/Co zeolitic imidazolate framework (ZIF) has been constructed which demonstrates better gas adsorption (CO2, CH4 and N2) and catalytic (CO2 conversion) properties compared with ZIF-8 and ZIF-67.

Cited by 584 publications

References 31 publications

Bimetallic zeolite imidazolate framework for enhanced lithium storage boosted by the redox participation of nitrogen atoms

Bimetallic zeolite imidazolate framework for enhanced lithium storage boosted by the redox participation of nitrogen atoms

Co/Cu bimetallic ZIF as New heterogeneous catalyst for reduction of nitroarenes and dyes

Switching from linear to cyclic δ‐Polyvalerolactone synthesized via zeolitic imidazolate framework as a catalyst: A promising approach

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