Controlled synthesis of highly stable zeolitic imidazolate framework-67 dodecahedra and their use towards the templated formation of a hollow Co<sub>3</sub>O<sub>4</sub> catalyst for CO oxidation

Wu, Hongyu; Qian, Xukun; Zhu, Haiping; Ma, Songhua; Zhu, Guangshan; Long, Yi

doi:10.1039/c5ra18557b

Cited by 70 publications

(40 citation statements)

References 49 publications

(43 reference statements)

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“…The morphology of ZIF-8 is a hexagonal cage. In addition, Figure 2(Ab-Ad) illustrates that the addition of copper over ZIF-8 shaped the rhombic dodecahedron structure, which is a typical ZIF-8 structure as reported [35]. However, the addition of Cu metal did not considerably change the structure of ZIF-8, it could be due to the low Cu loading.…”

Section: Effect Of Solvent Concentration On Cu/zif-8supporting

confidence: 56%

Photoreduction of Carbon Dioxide to Methanol over Copper Based Zeolitic Imidazolate Framework-8: A New Generation Photocatalyst

et al. 2018

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The efficient reduction of CO2 into valuable products such as methanol, over metal-organic frameworks (MOFs) based catalyst, has received much attention. The photocatalytic reduction is considered the most economical method due to the utilization of solar energy. In this study, Copper (II)/Zeolitic Imidazolate Framework-8 (Cu/ZIF-8) catalysts were synthesized via a hydrothermal method for photocatalytic reduction of CO2 to methanol. The synthesized catalysts were characterized by X-ray Photoelectron Spectroscopy (XPS), Field Emission Scanning Electron Microscopy (FESEM) coupled with Energy Dispersive X-ray (EDX), Ultraviolet-visible (UV-vis) spectroscopy, and X-Ray Diffraction (XRD). The host ZIF-8, treated with 2 mmol copper prepared in 2M ammonium hydroxide solution showed the highest photocatalytic activity. The crystal structures of ZIF-8 and 2Cu/ZIF-8N2 catalysts were observed as cubic and orthorhombic, respectively and the XPS analysis confirmed the deposition of Cu (II) ions over ZIF-8 surface among all the prepared catalysts. The orthorhombic structure, nano-sized crystals, morphology and Cu loading of the 2Cu/ZIF-8N2 catalyst were the core factors to influence the photocatalytic activity. The yield of Methanol was found to be 35.82 µmol/L·g after 6 h of irradiations on 2Cu/ZIF-8N2 catalyst in the wavelength range between 530–580 nm. The copper-based ZIF-8 catalyst has proven as an alternative approach for the economical photocatalytic reduction of CO2 to CH3OH.

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Section: Effect Of Solvent Concentration On Cu/zif-8supporting

confidence: 56%

Photoreduction of Carbon Dioxide to Methanol over Copper Based Zeolitic Imidazolate Framework-8: A New Generation Photocatalyst

et al. 2018

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“…ZIF‐67, Co(bIM) 2 , has a crystal structure similar to ZIF‐8 with a zeolite sodalite topology . Long and co‐workers reported the synthesis of uniform and nonaggregated ZIF‐67 dodecahedra.…”

Section: Stable Metal–organic Frameworkmentioning

confidence: 99%

Stable Metal–Organic Frameworks: Design, Synthesis, and Applications

et al. 2018

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Metal-organic frameworks (MOFs) are an emerging class of porous materials with potential applications in gas storage, separations, catalysis, and chemical sensing. Despite numerous advantages, applications of many MOFs are ultimately limited by their stability under harsh conditions. Herein, the recent advances in the field of stable MOFs, covering the fundamental mechanisms of MOF stability, design, and synthesis of stable MOF architectures, and their latest applications are reviewed. First, key factors that affect MOF stability under certain chemical environments are introduced to guide the design of robust structures. This is followed by a short review of synthetic strategies of stable MOFs including modulated synthesis and postsynthetic modifications. Based on the fundamentals of MOF stability, stable MOFs are classified into two categories: high-valency metal-carboxylate frameworks and low-valency metal-azolate frameworks. Along this line, some representative stable MOFs are introduced, their structures are described, and their properties are briefly discussed. The expanded applications of stable MOFs in Lewis/Brønsted acid catalysis, redox catalysis, photocatalysis, electrocatalysis, gas storage, and sensing are highlighted. Overall, this review is expected to guide the design of stable MOFs by providing insights into existing structures, which could lead to the discovery and development of more advanced functional materials.

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“…Copyright 2016, American Chemical Society); ii) CoO (Reproduced with permission . Copyright 2016, Wiley‐VCH); iii) Co 3 O 4 (Reproduced with permission . Copyright 2016, The Royal Society of Chemistry); iv) Co@C (Reproduced with permission .…”

Section: Conversion Of Zifs Into Nanoporous Hybrid Materialsmentioning

confidence: 99%

Strategies for Improving the Functionality of Zeolitic Imidazolate Frameworks: Tailoring Nanoarchitectures for Functional Applications

et al. 2017

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Zeolitic imidazolate frameworks (ZIFs), a subclass of metal-organic frameworks (MOFs) built with tetrahedral metal ions and imidazolates, offer permanent porosity and high thermal and chemical stabilities. While ZIFs possess some attractive physical and chemical properties, it remains important to enhance their functionality for practical application. Here, an overview of the extensive strategies which have been developed to improve the functionality of ZIFs is provided, including linker modifications, functional hybridization of ZIFs via the encapsulation of guest species (such as metal and metal oxide nanoparticles and biomolecules) into ZIFs, and hybridization with polymeric matrices to form mixed matrix membranes for industrial gas and liquid separations. Furthermore, the developed strategies for achieving size and shape control of ZIF nanocrystals are considered, which are important for optimizing the textural characteristics as well as the functional performance of ZIFs and their derived materials/hybrids. Moreover, the recent trends of using ZIFs as templates for the derivation of nanoporous hybrid materials, including carbon/metal, carbon/oxide, carbon/sulfide, and carbon/phosphide hybrids, are discussed. Finally, some perspectives on the potential future research directions and applications for ZIFs and ZIF-derived materials are offered.

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Controlled synthesis of highly stable zeolitic imidazolate framework-67 dodecahedra and their use towards the templated formation of a hollow Co₃O₄ catalyst for CO oxidation

Abstract: Uniform dodecahedral Co3O4 hollow architectures can be prepared from ZIF-67 templates, which were synthesized by controlling the reactants mole ratio, shows excellent catalytic performance for CO oxidation.

Cited by 70 publications

References 49 publications

Photoreduction of Carbon Dioxide to Methanol over Copper Based Zeolitic Imidazolate Framework-8: A New Generation Photocatalyst

Photoreduction of Carbon Dioxide to Methanol over Copper Based Zeolitic Imidazolate Framework-8: A New Generation Photocatalyst

Stable Metal–Organic Frameworks: Design, Synthesis, and Applications

Strategies for Improving the Functionality of Zeolitic Imidazolate Frameworks: Tailoring Nanoarchitectures for Functional Applications

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Controlled synthesis of highly stable zeolitic imidazolate framework-67 dodecahedra and their use towards the templated formation of a hollow Co3O4 catalyst for CO oxidation

Abstract: Uniform dodecahedral Co3O4 hollow architectures can be prepared from ZIF-67 templates, which were synthesized by controlling the reactants mole ratio, shows excellent catalytic performance for CO oxidation.

Cited by 70 publications

References 49 publications

Photoreduction of Carbon Dioxide to Methanol over Copper Based Zeolitic Imidazolate Framework-8: A New Generation Photocatalyst

Photoreduction of Carbon Dioxide to Methanol over Copper Based Zeolitic Imidazolate Framework-8: A New Generation Photocatalyst

Stable Metal–Organic Frameworks: Design, Synthesis, and Applications

Strategies for Improving the Functionality of Zeolitic Imidazolate Frameworks: Tailoring Nanoarchitectures for Functional Applications

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Controlled synthesis of highly stable zeolitic imidazolate framework-67 dodecahedra and their use towards the templated formation of a hollow Co₃O₄ catalyst for CO oxidation