Synthesis of a novel MOF/CuWO4 heterostructure for efficient photocatalytic degradation and removal of water pollutants

Ramezanalizadeh, Hamed; Manteghi, Faranak

doi:10.1016/j.jclepro.2017.11.145

Cited by 131 publications

(31 citation statements)

References 34 publications

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“…In fact, the adsorption effect of MOFs tested in a previous study was found to be better than that of commercial activated carbon [123]. Ramezanalizadeh et al [124] treated methylene blue and 4-nitrophenol via photo-catalytic degradation with MOFs/CuWO 4 , and found that the photo-catalytic efficiency of MOFs/CuWO 4 was significantly enhanced in the presence of MOFs. Zhou et al [125] prepared zirconium-based MOFs, which had a strong adsorption for tibiotic tetracycline.…”

Section: Effect Of Mofs On the Remediation Of Water Pollutionmentioning

confidence: 96%

Technology for the Remediation of Water Pollution: A Review on the Fabrication of Metal Organic Frameworks

2018

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The ineffective control of the release of pollutants into water has led to serious water pollution. Compared with conditions in the past, the polluting components in aquatic environments have become increasingly complex. Some emerging substances have led to a new threat to the safety of water. Therefore, developing cost-effective technologies for the remediation of water pollution is urgently needed. Adsorption has been considered the most effective operational unit in water treatment processes and thus adsorption materials have gained wide attention. Among them, metal organic frameworks (denoted as MOFs) have been rapidly developed in recent years due to their unique physicochemical performance. They are characterized by larger porosity and larger specific surface area, easier pore structure designing, and comfortable structural modification. In many fields such as adsorption, separation, storage, and transportation, MOFs show a better performance than conventional adsorption materials such as active carbon. Their performance is often dependent on their structural distribution. To optimize the use of MOFs, their fabrication should be given more attention, without being limited to conventional preparation methods. Alternative preparation methods are given in this review, such as diffusion, solvent thermal, microwave, and ion thermal synthesis. Furthermore, developing functionalized MOFs is an available option to improve the removal efficiencies of a specific contaminant through pre-synthetic modification and post-synthesis modification. Post-synthesis modification has become a recent research hotspot. The coupling of MOFs with other techniques would be another option to ameliorate the remediation of water pollution. On one hand, their intrinsic drawbacks may be reduced. On the other hand, their performance may be enhanced due to their interaction behaviors. Overall, such coupling technologies are able to enhance the performance of an individual material. Because the excellent performance of MOF materials has been widely recognized and their developments have received wide attention, especially in environmental fields, in the present work we provide a review of fabrication of MOFs so as to motivate readers to deepen their understanding of the use of MOFs.

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Section: Effect Of Mofs On the Remediation Of Water Pollutionmentioning

confidence: 96%

Technology for the Remediation of Water Pollution: A Review on the Fabrication of Metal Organic Frameworks

2018

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“…The nanocatalysts thus obtained are expected to have enhanced catalytic performance, due to the following reasons: 1) small Ag NPs, with well and uniform dispersion due to their immobilization onto the hosts/stabilizers of MOF-199 s [16] 2) the catalytic activity of MOF-199 s themselves, due to the desired electron transfer of the MOF porous structures, [14] and 3) the adsorptive concentration effects of 4-NP onto MOF surface area and porous structure. [24] SCHEME 1 Concept of synthesizing Ag NPs@ MOF-199 s/CCFs for the catalytic reduction of 4-NP…”

Section: Proposed Concept Of Immobilizing Ag Nps On Mof-199 S/ccfs mentioning

confidence: 99%

Fabrication of carboxymethylated cellulose fibers supporting Ag NPs@MOF‐199s nanocatalysts for catalytic reduction of 4‐nitrophenol

Duan

Liu

Meng

et al. 2019

Applied Organom Chemis

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In this work, we prepared high‐performance and recyclable nanocatalysts that consist of small and well‐dispersed silver nanoparticles (Ag NPs) immobilized onto Cu‐ based metal–organic framework (MOF‐199 s) supported by carboxymethylated cellulose fibers (CCFs). The as‐prepared green nanohybrid catalysts, namely Ag NPs@ MOF‐199 s/CCFs, were characterized using SEM, TEM, XRD and FT‐IR techniques. The catalytic performances showed that Ag NPs@ MOF‐199 s/CCFs catalysts exhibited a very high catalytic efficiency towards the reduction of 4‐nitrophenol to 4‐aminophenol. The enhanced catalytic performances are attributed to the improved dispersity, small particles of Ag NPs stabilized by the MOF‐199 s, and the porous catalyst structures. The introduction of cellulose fiber further facilitates the reuse and sustainability of the nanohybrid catalysts, showing a stable and high reusability (more than 91% of catalytic activity) even after five runs.

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“…The MOFs have been studied since 1990s with more than 20,000 structures synthesized and evaluated for applications such as adsorption, catalysis, drug delivery, sensing, separation, gas storage, bioimaging and so on [61][62][63][64]. These structures have shown huge potential in these areas due to distinctive features, such as high porosity and surface area, chemically adjustable pore, uniform structures, tunable surface properties (functional groups), good thermal stability, unsaturated metal centers and even the catalytically active organic linkers [65][66][67][68]. The most typical metal-organic frameworks are MIL (Materials of Institute Lavoisier), based on lanthanides or transition metals; UiO (University of Oslo), built up with Zr; MOF-5, composed of Zn; and Cu-BTC, based on Cu [69].…”

Section: Metal-organic Framework (Mofs)mentioning

confidence: 99%

“…MOFs photocatalytic properties are exploited due to high capacity of the organic linkers in absorbing photons, such as antennas to harvest light, which transfer the energy to the metal sites by transition from ligand to metal cluster charge under UV or visible light radiation [76,77]. Therefore, these structures can act as semiconductor, since MOFs contain conduction and valence bands, with band gaps in the range of 1.0-5.5 eV, or the band gaps are related to the energy levels of the highest occupied molecular orbitals (HOMOs) and lowest unoccupied molecular orbitals (LUMOs) of the linker molecules, which leads to the formation of charge carriers (e − /h + ) that can subsequently be transferred to the surface [60,68]. Furthermore, the easily tailorable physical and chemical functions, together with the large surface area and permanent pores/channels to potentially anchor/encapsulate photosensitizers and catalytic moieties, make MOFs potential candidates for application in photocatalytic processes [78].…”

Section: Metal-organic Framework (Mofs)mentioning

confidence: 99%

Photocatalytic Adsorbents Nanoparticles

Colpani¹,

Dal’Toé²,

Zanetti³

et al. 2019

Advanced Sorption Process Applications

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Photocatalysis and high adsorption coupling in a same nanoparticle have been emerged as a prominent class of cost-effective materials to degrade recalcitrant contaminants in wastewater. α-Hematite, metal-organic frameworks and TiO 2 nanocomposites have been investigated due to their features that overcome the other conventional photocatalysts and adsorbents to remove contaminants in aqueous medium. Several methods are applied to synthesize these nanostructures with different properties and physicochemical features and a brief review is shown to these well-established techniques to provide an understanding for the construction and application of these advanced materials.

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Synthesis of a novel MOF/CuWO4 heterostructure for efficient photocatalytic degradation and removal of water pollutants

Cited by 131 publications

References 34 publications

Technology for the Remediation of Water Pollution: A Review on the Fabrication of Metal Organic Frameworks

Technology for the Remediation of Water Pollution: A Review on the Fabrication of Metal Organic Frameworks

Fabrication of carboxymethylated cellulose fibers supporting Ag NPs@MOF‐199s nanocatalysts for catalytic reduction of 4‐nitrophenol

Photocatalytic Adsorbents Nanoparticles

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