Hierarchical porous zeolitic imidazolate frameworks (ZIF-8) and ZnO@N-doped carbon for selective adsorption and photocatalytic degradation of organic pollutants

2022

Applied Organom Chemis

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Carbon dioxide (CO2) is one of the culprit causes of global climatic changes. Furthermore, the efficient separation of CO2 from other gaseous mixtures using zeolitic imidazolate framework (ZIF)‐based materials is vital for several processes such as flue gas separation, gas sweetening, and natural gas processing. ZIF‐based materials are emerging adsorbents and catalysts for CO2 gas removal via adsorption and conversion into valuable chemicals. ZIF‐based adsorbents with high‐adsorption/conversion efficiencies and tunable properties can be achieved by judicious synthesis and fabrication methods. We reviewed ZIF‐based materials for CO2 removal via adsorption and catalysis (e.g., cycloaddition, carboxylation, hydrogenation, N‐formylation, electrocatalysis, and photocatalysis). In addition, recent development methods such as membrane technologies and ways to improve the gas separation performance of ZIF membranes were highlighted. The prospective point of view to promote industrial applications and commercialization of ZIF‐based materials was briefly discussed. Once challenges such as low performance and reproducibility for ZIF‐based materials are solved, scalability and cost‐effectiveness should not become issues.

Section: Hydrogenation For Comentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Removal of carbon dioxide using zeolitic imidazolate frameworks: Adsorption and conversion via catalysis

2022

Applied Organom Chemis

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“…Most of the reported ZIF materials lack high visible-light absorption. For example, ZIF-8 has bandgap of 4.3 eV [74] . Thus, it shows zero rate of photocatalytic reduction of CO2 [323][324][325] .…”

Section: 5photocatalytic Reduction Of Co2mentioning

confidence: 99%

A Review on Removal of Carbon Dioxide (CO2) using Zeolitic Imidazolate Frameworks: Adsorption and Conversion via Catalysis

2022

Preprint

Self Cite

Carbon dioxide (CO2) is one of the culprit causes of global climatic changes. Furthermore, the efficient separation of CO2 from other gaseous mixtures using ZIFs-based materials is vital for several processes such as flue gas separation, gas sweetening, and natural gas processing. Zeolitic imidazolate frameworks (ZIFs)-based materials are emerging adsorbents and catalysts for CO2 gas removal via adsorption and conversion into valuable chemicals. ZIFs-based adsorbents with high adsorption/conversion efficiencies and tunable properties can be achieved by judicious synthesis and fabrication methods. We reviewed ZIF-based materials for CO2 removal via adsorption and catalysis (e.g., cycloaddition, carboxylation, hydrogenation, N-formylation, electrocatalysis, and photocatalysis). In addition, recent development methods such as membrane synthesis and ways to improve the gas separation performance of ZIF membranes were highlighted. The prospective point of view to promote industrial applications and commercialization of ZIF-based materials was briefly discussed. Once challenges such as low performance and reproducibility for ZIFs-based materials are solved, scalability and cost-effectiveness should not become issues.

“…Heavy metals are highly important for several industrial applications and technologies including nanotechnology [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] . However, the imbalance concentration of heavy metals in water exhibit a negative impact on the environment.…”

Section: Introductionmentioning

confidence: 99%

Selective Naked-eyes Chemosensing of Cu2+ ions using Chitosan-CdS Quantum Dots Biohybrid

Algethami

Saidi

et al. 2022

Preprint

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Cadmium sulfide (CdS) quantum dots (QDs) were homogeneously embedded into chitosan (CTS), denoted as CdS/CTS, via an in-situ solvothermal method. The intact structure of the synthesized materials was preserved via separating the materials using freeze-drying. The materials were characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM), high-resolution TEM (HR-TEM), scanning TEM (STEM), dispersive energy X-ray (EDX) for elemental analysis and mapping, Fourier transform infrared (FT-IR), nitrogen adsorp-tion-desorption isotherms, thermogravimetric analysis, UV-Vis spectroscopy, and diffuse reflectance spectroscopy (DRS). The synthesis procedure offered CdS QDs with 1-7 nm (average particle size of 3.2 nm). The functional groups of CTS modulate the in-situ growth of CdS QDs and prevent the agglomeration of CdS QDs, offering homogenous distribution inside CTS. CdS/CTS QDs can also be used for naked-eye detection of heavy metals with high selectivity toward copper (Cu2+) ions. The mechanism of interactions between Cu2+ ions and CdS/CTS QDs was further studied