Room Temperature Synthesis and Characterizations of ZIF-8 Formation at Water-Fatty Alcohols Interface

Misran, Halina; Mahadi, N.; Othman, Siti Zubaidah; Lockman, Zainovia; Amin, Nowshad; Matsumoto, Akihiko

doi:10.1088/1742-6596/1082/1/012046

Cited by 11 publications

(9 citation statements)

References 12 publications

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“…It has been found that their mechanism is the same as that of the water-alcohol insoluble monolayer interfaces at the liquid-to-gas interaction. Therefore, the miscibility of the Zn 2+ ions and deprotonated methylimidazole linkers are elevated by increasing the solvents' polarity, which results in greater interaction with the metal ions and, thus, the creation of smaller unit cells [48].…”

Section: Hydrothermal Synthesis Methodsmentioning

confidence: 99%

Green Synthesis of Zeolitic Imidazolate Frameworks: A Review of Their Characterization and Industrial and Medical Applications

et al. 2022

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Metal organic frameworks (MOF) are a class of hybrid networks of supramolecular solid materials comprising a large number of inorganic and organic linkers, all bound to metal ions in a well-organized fashion. Zeolitic imidazolate frameworks (ZIFs) are a sub-group of MOFs with imidazole as an organic linker to metals; it is rich in carbon, nitrogen, and transition metals. ZIFs combine the classical zeolite characteristics of thermal and chemical stability with pore-size tunability and the rich topological diversity of MOFs. Due to the energy crisis and the existence of organic solvents that lead to environmental hazards, considerable research efforts have been devoted to devising clean and sustainable synthesis routes for ZIFs to reduce the environmental impact of their preparation. Green chemistry is the key to sustainable development, as it will lead to new solutions to existing problems. Moreover, it will present opportunities for new processes and products and, at its heart, is scientific and technological innovation. The green chemistry approach seeks to redesign the materials that make up the basis of our society and our economy, including the materials that generate, store, and transport our energy, in ways that are benign for humans and the environment and that possess intrinsic sustainability. This study covers the principles of green chemistry as used in designing strategies for synthesizing greener, less toxic ZIFs the consume less energy to produce. First, the necessity of green methods in today’s society, their replacement of the usual non-green methods and their benefits are discussed; then, various methods for the green synthesis of ZIF compounds, such as hydrothermally, ionothermally, and by the electrospray technique, are considered. These methods use the least harmful and toxic substances, especially concerning organic solvents, and are also more economical. When a compound is synthesized by a green method, a question arises as to whether these compounds can replace the same compounds as synthesized by non-green methods. For example, is the thermal stability of these compounds (which is one of the most important features of ZIFs) preserved? Therefore, after studying the methods of identifying these compounds, in the last part, there is an in-depth discussion on the various applications of these green-synthesized compounds.

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Section: Hydrothermal Synthesis Methodsmentioning

confidence: 99%

Green Synthesis of Zeolitic Imidazolate Frameworks: A Review of Their Characterization and Industrial and Medical Applications

et al. 2022

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“…, water or methanol) with the ZIF-8 framework. 62 The absorbance intensity of leaf-like ZIF materials is larger than the others by ca. 19%, indicating that ZIF-8-F3 can absorb the UV region stronger than the others.…”

Section: Resultsmentioning

confidence: 97%

“…Besides, the humped absorption edge is revealed at approximately 281 nm (F1), 282 nm (F2), and 273 nm (F3), which is assigned to the interactions of solvent molecules (i.e., water or methanol) with the ZIF-8 framework. 62 The absorbance intensity of leaf-like ZIF materials is larger than the others by ca. 19%, indicating that ZIF-8-F3 can absorb the UV region stronger than the others.…”

Section: Optical and Photoelectrochemical Propertiesmentioning

confidence: 97%

Highly efficient degradation of reactive black KN-B dye by ultraviolet light responsive ZIF-8 photocatalysts with different morphologies

Trung

Nguyen

et al. 2023

RSC Adv.

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“…The UV‐vis DR spectra could be divided into three regions: <300 nm, 300–400 nm and >400 nm, corresponding to mononuclear Fe species, oligomeric Fe x O y clusters and Fe 2 O 3 nanoparticles, respectively [20] . ZIF‐8 only shows one peak located at 210 nm, which can be ascribed to the four‐coordinated Zn nodes [21] . After the in‐situ introduction of Fe species, both Fe‐ZIF‐8‐0.14 and Fe‐ZIF‐8‐0.28 samples mainly display two features located at 240 nm and 365 nm, respectively, indicating the dominance of mononuclear Fe species and oligomeric Fe x O y clusters in the two catalysts.…”

Section: Resultsmentioning

confidence: 98%

“…[20] ZIF-8 only shows one peak located at 210 nm, which can be ascribed to the four-coordinated Zn nodes. [21] After the in-situ introduction of Fe species, both Fe-ZIF-8-0.14 and Fe-ZIF-8-0.28 samples mainly display two features located at 240 nm and 365 nm, respectively, indicating the dominance of mononuclear Fe species and oligomeric Fe x O y clusters in the two catalysts. As the Fe loading increases for Fe-ZIF-8-0.55, the signals at 365 nm are further developed, and a broad peak at > 400 nm additionally appears, indicating the formation of more oligomeric Fe x O y clusters and also a small amount of Fe 2 O 3 nanoparticles, in line with the STEM images (Figure S2) and XPS spectra of Fe-ZIF-8-0.55 (Figure 3).…”

Section: Chemcatchemmentioning

confidence: 94%

Selective Oxidation of Methane into Formic Acid over ZIF‐8‐Encapsulated Mononuclear Fe Species under Mild Conditions

et al. 2022

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The direct catalytic oxidation of methane into C1 oxygenates is a promising approach for methane valorization. However, the difficulties in CH 4 activation and inhibition of over-oxidation hinder the development of efficient catalysts for this transformation. Herein, highly dispersed Fe species confined by ZIF-8 are developed for the direct transformation of methane into value-added C1 oxygenates with H 2 O 2 as oxidant at 323 K. The as-obtained Fe-ZIF-8 can afford an optimal turnover rate (TOR) of ~45 mol C1 mol Fe À 1 h À 1 . Note that the selectivity to HCOOH is ~97 %, outstanding among the reported Fe-based heteroge-neous catalysts. Combined analysis of X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy and 57 Fe Mössbauer spectroscopy suggests that the catalytically active sites in Fe-ZIF-8 are mononuclear six-coordinated Fe 3 + species. The confinement of mononuclear Fe species within a porous metal-organic framework material can provide an exquisite, enzyme-like performance for highly selective oxidation of methane towards formic acid under mild conditions.

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Room Temperature Synthesis and Characterizations of ZIF-8 Formation at Water-Fatty Alcohols Interface

Cited by 11 publications

References 12 publications

Green Synthesis of Zeolitic Imidazolate Frameworks: A Review of Their Characterization and Industrial and Medical Applications

Green Synthesis of Zeolitic Imidazolate Frameworks: A Review of Their Characterization and Industrial and Medical Applications

Highly efficient degradation of reactive black KN-B dye by ultraviolet light responsive ZIF-8 photocatalysts with different morphologies

Selective Oxidation of Methane into Formic Acid over ZIF‐8‐Encapsulated Mononuclear Fe Species under Mild Conditions

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