Structural Evolution and Compositional Modulation of ZIF-8-Derived Hybrids Comprised of Metallic Ni Nanoparticles and Silica as Interlayer

He, Wenling; Guo, Xiaohui; Zheng, Jing; Xu, Jingli; Hayat, Tasawar; Alharbi, Njud S.; Zhang, Min

doi:10.1021/acs.inorgchem.9b00288

Cited by 101 publications

(36 citation statements)

References 55 publications

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“…The Langmuir equation assumes that during the adsorption process there is monolayer coverage of the adsorbates on the adsorbents with no interactions between the adsorbate molecules [30,31]. Previous studies reported the adsorption of PFOS on ACs followed the Langmuir model [19,20]; however, when comparing R 2 values, the Freundlich model fitted the adsorption of OBS on ACs better in the present study.…”

Section: Resultsmentioning

confidence: 64%

Adsorption behaviour and mechanism of the PFOS substitute OBS (sodium p -perfluorous nonenoxybenzene sulfonate) on activated carbon

Wang

Shi

et al. 2019

R. Soc. open sci.

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Perfluorooctane sulfonate (PFOS) was listed as a persistent organic pollutant by the Stockholm Convention. As a typical alternative to PFOS, sodium p -perfluorous nonenoxybenzene sulfonate (OBS) has recently been detected in the aquatic environment which has caused great concern. For the first time, the adsorption behaviour and mechanism of OBS on activated carbon (AC) with different physical and chemical properties were investigated. Decreasing the particle size of AC can accelerate its adsorption for OBS, while AC with too small particle size was not conducive to its adsorption capacity due to the destruction of its pore structure during the mechanical crushing process. Intra-particle diffusion had a lesser effect on the adsorption rate of AC with smaller particle size, higher hydrophilicity and larger pore size. Reactivation of AC by KOH can greatly enlarge their pore size and surface area, greatly increasing their adsorption capacities. The adsorption capacity of two kinds of R-GAC exceeded 0.35 mmol g −1 , significantly higher than that of other ACs. However, increasing the hydrophilicity of AC would decrease their adsorption capacities. Further investigation indicated that a larger pore size and smaller particle size can greatly enhance the adsorptive removal of OBS on AC in systems with other coexisting PFASs and organic matter due to the reduction of the pore-blocking effect. The spent AC can be successfully regenerated by methanol, and it can be partly regenerated by hot water and NaOH solution. The percentage of regeneration for the spent AC was 70.4% with 90°C water temperature and up to 95% when 5% NaOH was added into the regeneration solution. These findings are very important for developing efficient adsorbents for the removal of these newly emerging PFASs from wastewater and understanding their interfacial behaviour.

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Section: Resultsmentioning

confidence: 64%

Adsorption behaviour and mechanism of the PFOS substitute OBS (sodium p -perfluorous nonenoxybenzene sulfonate) on activated carbon

Wang

Shi

et al. 2019

R. Soc. open sci.

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“…Like reported in the previous adsorption studies, Langmuir adsorption isotherm was used to correlate the amount of metal ions adsorbed by unit mass of adsorbent where monolayer type coverage of metal ions is assumed over energetically identical adsorption sites of the adsorbent surface. The Langmuir model can be written as equation :

true \frac{1}{{boldq}_{bolde}} = \frac{1}{{boldq}_{boldm}} + \frac{1}{boldb q_{m} C_{e}}

…”

Section: Resultsmentioning

confidence: 99%

Exploring Metal Ion Adsorption and Antifungal Properties of Carbon‐Coated Magnetite Composite

et al. 2020

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Nanoparticles have earned huge research interest due to their well known characteristics such as high specific surface, minimal environmental impact, ease in surface modification and low solubility in water. As a result, such materials have been used effectively to remove toxic metal ions from wastewater. Their adsorption potential has been further improved by modifying their surfaces by various means. In one such attempt, we have successfully synthesized magnetite and modified its surface by carbon while using glucose carbonization method. The as‐synthesized carbon coated magnetite (Mag@C) composite was characterized by Fourier transform infrared (FTIR) spectroscopy and the results were further supported by Energy dispersive X‐ray spectrometry (EDX), Scanning electron microscopy (SEM), Thermal gravimetric analysis (TGA), Zetastudies and X‐ray diffraction crystallography (XRD) like techniques. The Adsorption properties of Mag@C were explored for the removal of Cd2+ and Pb2+ ions where a promising adsorption performance towards these metal ions with maximum adsorption capacities of 127.3 mg/g and 103 mg/g for Cd2+ and Pb2+ ions, respectively, was obtained. The material was also examined for its antifungal properties towards Aspergillus niger and Penicillium notatum, two toxic species of fungi and a good fungicidal property of the composite material was observed. Adual application of Mag@C makes it as a useful material in the process of waste water treatment.

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“…As a kind of crystalline material containing metal or metal cluster junctions, metal–organic skeleton materials are expected to become heterogeneous catalysts or catalyst carriers [113,114,115,116,117,118,119,120]. MOF materials provide a highly tunable platform for structure and performance, integrating all the properties required for catalysis, including high surface area, high porosity, active metal sites, recyclability, and high crystallinity [55,121,122,123,124].…”

Section: Application Of Mof/silica Compositementioning

confidence: 99%

Functional Metal Organic Framework/SiO2 Nanocomposites: From Versatile Synthesis to Advanced Applications

et al. 2019

Polymers

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Metal organic frameworks (MOFs), also called porous coordination polymers, have attracted extensive attention as molecular-level organic-inorganic hybrid supramolecular solid materials bridged by metal ions/clusters and organic ligands. Given their advantages, such as their high specific surface area, high porosity, and open active metal sites, MOFs offer great potential for gas storage, adsorption, catalysis, pollute removal, and biomedicine. However, the relatively weak stability and poor mechanical property of most MOFs have limited the practical application of such materials. Recently, the combination of MOFs with inorganic materials has been found to provide a possible strategy to solve such limitations. Silica, which has excellent chemical stability and mechanical properties, shows great advantages in compounding with MOFs to improve their properties and performance. It not only provides structured support for MOF materials but also improves the stability of materials through hydrophobic interaction or covalent bonding. This review summarizes the fabrication strategy, structural characteristics, and applications of MOF/silica composites, focusing on their application in chromatographic column separation, catalysis, biomedicine, and adsorption. The challenges of the application of MOF/SiO2 composites are addressed, and future developments are prospected.

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Structural Evolution and Compositional Modulation of ZIF-8-Derived Hybrids Comprised of Metallic Ni Nanoparticles and Silica as Interlayer

Cited by 101 publications

References 55 publications

Adsorption behaviour and mechanism of the PFOS substitute OBS (sodium p -perfluorous nonenoxybenzene sulfonate) on activated carbon

Adsorption behaviour and mechanism of the PFOS substitute OBS (sodium p -perfluorous nonenoxybenzene sulfonate) on activated carbon

Exploring Metal Ion Adsorption and Antifungal Properties of Carbon‐Coated Magnetite Composite

Functional Metal Organic Framework/SiO2 Nanocomposites: From Versatile Synthesis to Advanced Applications

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