A ligand strategic approach with Cu-MOF for enhanced solar light photocatalysis

Surib, Nur Atiqah; Kuila, Aneek; Saravanan, Pichiah; Sim, Lan Ching; Leong, Kah Hon

doi:10.1039/c8nj01932k

Cited by 21 publications

(8 citation statements)

References 27 publications

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“…On the other hand, IR spectra of these modified Cu meshes were collected, and are displayed in Figure 4b. In comparison to the pristine Cu mesh, these modified Cu meshes showed a number of bands at 700~1850 cm −1 , which were characteristic peaks of the carboxylate ligands, as displayed in Figure S2 [31][32][33]. In particular, the bands at 734 and 1500 cm −1 can be ascribed to aromatic rings [31], whereas the bands at 1400 cm −1 , as well as 1670 cm −1 , correspond to the coordinated carboxylic, and carbonyl groups in BDC-based MOF.…”

Section: Characterization Of Cucf Meshesmentioning

confidence: 99%

“…In comparison to the pristine Cu mesh, these modified Cu meshes showed a number of bands at 700~1850 cm −1 , which were characteristic peaks of the carboxylate ligands, as displayed in Figure S2 [31][32][33]. In particular, the bands at 734 and 1500 cm −1 can be ascribed to aromatic rings [31], whereas the bands at 1400 cm −1 , as well as 1670 cm −1 , correspond to the coordinated carboxylic, and carbonyl groups in BDC-based MOF. Therefore, these IR spectra of modified Cu meshes also demonstrated that the carboxylate ligands were coordinated with Cu in these nanostructures grown on Cu meshes, forming CuCF meshes.…”

Section: Characterization Of Cucf Meshesmentioning

confidence: 99%

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Single-Step Synthesized Functionalized Copper Carboxylate Framework Meshes as Hierarchical Catalysts for Enhanced Reduction of Nitrogen-Containing Phenolic Contaminants

et al. 2022

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Nitrogen-containing phenolic contaminants (NCPCs) represent typical pollutants of industrial wastewaters. As catalytic reduction of NCPCs is a useful technique and Cu is an efficient metal catalyst, Cu-carboxylate frameworks (CuCF) are favorable materials. However, they are in powder form, making them difficult to use; thus, in this study, CuCF was grown on macroscale supports. Herein, we present a facile approach to develop such a CuCF composite by directly using a Cu mesh to grow CuCF on the mesh through a single-step electrochemical synthesis method, forming CuCF mesh (CFM). CFM could be further modified to afford CuCF mesh with amines (NH2) (CFNM), and CuCF mesh with carboxylates (COOH) (CFCM). These CuCF meshes are compared to investigate how their physical and chemical characteristics influenced their catalytic behaviors for reduction/hydrogenation of NPCPs, including nitrophenols (NPs) and dyes. Their nanostructures and surface properties influence their behaviors in catalytic reactions. In particular, CFCM appears to be the most efficient mesh for catalyzing 4-NP, with a much higher rate constant. CFCM also shows a significantly lower Ea (28.1 kJ/mol). CFCM is employed for many consecutive cycles, as well as convenient filtration-type 4-NP reduction. These CuCF meshes can also be employed for decolorization of methylene blue and methyl orange dyes via catalytic hydrogenation.

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Section: Characterization Of Cucf Meshesmentioning

confidence: 99%

Section: Characterization Of Cucf Meshesmentioning

confidence: 99%

Single-Step Synthesized Functionalized Copper Carboxylate Framework Meshes as Hierarchical Catalysts for Enhanced Reduction of Nitrogen-Containing Phenolic Contaminants

et al. 2022

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“…The photocatalytic degradation efficiencies of pesticides by novel MOFs in some recent studies are summarized in Table S1. ,,,,,,− The most commonly studied pesticides in recent studies include herbicides (atrazine, ,,, 2,4-D, paraquat, 2,4-dinitrophenol (DNP)) and insecticides (diazinon, , malathion, , methyl malathion, bis( p -nitrophenyl) phosphate (BNPP), 4-nitrophenol (4-NP), − nitenpyram (NIT), and chlorpyrifos). Among them, the degradation efficiencies of atrazine are not as impressive as other pesticides, as none of the studies reported a high degradation efficiency (>90%) even after relatively long reaction time.…”

Section: Mof-catalyzed Photocatalytic Degradation Of Pesticidesmentioning

confidence: 99%

Metal Organic Frameworks (MOFs) as Photocatalysts for the Degradation of Agricultural Pollutants in Water

et al. 2021

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Increasing demand for food due to rapid population growth has exerted unprecedented pressure on the global agricultural industry. Agrochemicals are widely used to ensure productivity, leading to the prevalence of legacy and emerging agricultural chemicals in the environment, most of which are toxic and persistent. Metal−organic frameworks (MOFs) as a group of novel photocatalytic materials with ultrahigh porosity and tunability have demonstrated high potential for efficient removal of these recalcitrant pollutants. This critical review aims to present the potential of MOF-catalyzed photodegradation of pesticides and antibiotics. Initially, the capabilities of different MOF-based composites to harvest visible light are compared. Examples include MOFs combined with bismuth oxyhalides (BiOX) and graphite oxide (GO). Mechanisms involved in MOF-induced photocatalytic processes such as electron−hole (e − /h + ) separation, generation of reactive species, and degradation pathways of representative pollutants as well as impacts of water chemistry are illustrated in detailed. Research on applying MOF-catalyzed processes is largely in progress, and many more studies with greater mechanistic evaluation are needed to fully assess the potential of such processes to depollute water.

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“…[ 1–3 ] On the other hand, linker and orbital engineering‐based reconstruction by incorporating pi‐conjugated ligands and intermolecular charge trapping were also explored. [ 4,5 ] The former deals with organic framework rather than the metal center, while the latter was limited only to single metal cluster. However, an approach involving intermolecular charge trapping with the assistance of two different metal centers is seen as a sensible alternative.…”

Section: Introductionmentioning

confidence: 99%

Intramolecular orbital engineered hetero bimetallic Ce‐Fe MOF with reduced transition energy and enhanced visible light property

Kuila

Saravanan

2020

Applied Organom Chemis

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A structurally stable, 3d-4f heterometallic coordination polymer has been solvothermally synthesised and evaluated for its accomplished materials properties. The light absorption activity in the visible band was higher for unique Ce-Fe MOF than that of the homometallic Ce-MOF or Fe-MOF. The intimate overlap of two different metal clusters in heterometallic environmental induced the formation of low line conduction orbital, which ultimately lowered the transition energy. The heterometallic acquired an additional sensitisation from a Fe-μ3-oxo cluster that had vibrantly enhanced the light uptake activity. The vacancy created in the 6s, 5d orbital of Ce in Ce-Fe MOF contributed to the photo-excitation of electrons and reduced the recombination time. This distinct intramolecular arrangement assisted the exciton trapping characteristic. Also, the presence of multiple metal cores in the framework aided to confine the increased number of excitons for a redox reaction. The solar photocatalysis study with acetaminophen revealed these improved materialistic features by degrading it 94.6% with a rate constant of 0.0137 min −1. The recycle studies confirmed the robust stability of the synthesised MOF.

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A ligand strategic approach with Cu-MOF for enhanced solar light photocatalysis

Abstract: A bi-linker approach was employed on Cu-MOF for enhanced solar-light photocatalytic activity

Cited by 21 publications

References 27 publications

Single-Step Synthesized Functionalized Copper Carboxylate Framework Meshes as Hierarchical Catalysts for Enhanced Reduction of Nitrogen-Containing Phenolic Contaminants

Single-Step Synthesized Functionalized Copper Carboxylate Framework Meshes as Hierarchical Catalysts for Enhanced Reduction of Nitrogen-Containing Phenolic Contaminants

Metal Organic Frameworks (MOFs) as Photocatalysts for the Degradation of Agricultural Pollutants in Water

Intramolecular orbital engineered hetero bimetallic Ce‐Fe MOF with reduced transition energy and enhanced visible light property

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