Recent advances in MOF-based photocatalysis: environmental remediation under visible light

Wang, Qi; Gao, Qiaoyuan; Al-Enizi, Abdullah M.; Nafady, Ayman; Ma, Shengqian

doi:10.1039/c9qi01120j

Cited by 491 publications

(239 citation statements)

References 293 publications

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“…The interest of the scientific community in the preparation, characterization, and study of metal-organic frameworks (MOFs) has continuously grown during the last forty years [ 1 , 2 , 3 ]. MOFs possess exceptional chemical versatility and tunable porosity that make them promising materials for a wide range of applications [ 4 ], including, among others, separation science [ 5 , 6 , 7 , 8 ], health [ 9 , 10 , 11 ], and the environment [ 12 ]. The development of many MOF applications nevertheless requires the formation of uniform MOF thin films onto appropriate surfaces [ 13 , 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Coating of Conducting and Insulating Threads with Porous MOF Particles through Langmuir-Blodgett Technique

et al. 2021

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The Langmuir-Blodgett (LB) method is a well-known deposition technique for the fabrication of ordered monolayer and multilayer thin films of nanomaterials onto different substrates that plays a critical role in the development of functional devices for various applications. This paper describes detailed studies about the best coating configuration for nanoparticles of a porous metal-organic framework (MOF) onto both insulating or conductive threads and nylon fiber. We design and fabricate customized polymethylmethacrylate sheets (PMMA) holders to deposit MOF layers onto the threads or fiber using the LB technique. Two different orientations, namely, horizontal and vertical, are used to deposit MIL-96(Al) monolayer films onto five different types of threads and nylon fiber. These studies show that LB film formation strongly depends on deposition orientation and the type of threads or fiber. Among all the samples tested, cotton thread and nylon fiber with vertical deposition show more homogenous monolayer coverage. In the case of conductive threads, the MOF particles tend to aggregate between the conductive thread’s fibers instead of forming a continuous monolayer coating. Our results show a significant contribution in terms of MOF monolayer deposition onto single fiber and threads that will contribute to the fabrication of single fiber or thread-based devices in the future.

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Section: Introductionmentioning

confidence: 99%

Coating of Conducting and Insulating Threads with Porous MOF Particles through Langmuir-Blodgett Technique

et al. 2021

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“…In high salt solutions, hydration layers between functional hydrophilic groups weaken electrostatic repulsion induced by high salt, this limiting salt-induced aggregation and facilitating the high colloidal stability of MOFs in these solutions. In addition, because of the huge diversity of organic linkers, MOFs possess tunable UV-Vis spectra capabilities resulting from ligand functionalization, and different combinations of metal nodes and organic linkers ( Espin et al, 2018 ; Wang et al, 2020 ). Accordingly, these tunable UV-Vis spectra can be overlapped with emission spectra from UCNPs, inducing fluorescence resonant energy transfers between UCNPs and MOFs.…”

Section: Introductionmentioning

confidence: 99%

Metal Organic Frame-Upconverting Nanoparticle Assemblies for the FRET Based Sensor Detection of Bisphenol A in High-Salt Foods

Zhang

Long

et al. 2020

Front. Bioeng. Biotechnol.

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To resolve the occurrence of unfulfillable detection in high-salts foods, we used fluorescence resonant energy transfer (FRET) sensors based on nanoparticle upconversion. In this study, we developed a novel FRET sensor for the detection of bisphenol A (BPA) in high-salt foods. We based this approach on the assembly of aptamer modified upconversion nanoparticles (DNA1-UCNPs) and complementary DNA modified metal organic frames (DNA2-MOFs), which possessed corresponding wavelength absorption. Targeting BPA signal transduction was performed using the BPA aptamer, via competitive recognition between the BPA analyte and complementary DNA sequences in a high-salt solution. Sensor adaption in high-salt samples was attributed to functional hydrophilic groups, modified in the MOFs, and the enhanced colloidal stability of these MOFs. The MOF-UCNP assembly displayed considerable analytical performance in terms of BPA detection, with a linear range of 0.1–100 nM, and a limit of detection (LOD) of 0.02 nM, in a 340 mM NaCl food sample (the energy drink, Gatorade). Thus, this method provides a solid basis for small molecules detection in high-salt foods.

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“…One such function is that of photoactivity, a property which may have various manifestations [2,8], but which in the case of uranium(VI) as uranyl ion, UO 2 2+ , derivatives, is anticipated to be that of photo-oxidation catalysis, long known in their solution chemistry [20][21][22]. Although photocatalysis by metal-organic framework (MOF) systems in particular could be described in 2017 as a "largely unexplored field" [23], it has rapidly become a popular area of study [24]. Investigations of hetereogeneous photocatalysis by uranyl-containing solids [25][26][27][28][29][30][31][32][33][34][35], however, have remained largely limited to those of oxidative destruction of environmental pollutants or to basic mechanistic work, although water splitting has been frequently cited as a possible application.…”

Section: Introductionmentioning

confidence: 99%

Uranyl Ion Complexes of Polycarboxylates: Steps towards Isolated Photoactive Cavities

Harrowfield

Thuéry

2020

Chemistry

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Consideration of the extensive family of known uranyl ion complexes of polycarboxylate ligands shows that there are quite numerous examples of crystalline solids containing capsular, closed oligomeric species with the potential for use as selective heterogeneous photo-oxidation catalysts. None of them have yet been assessed for this purpose, and some have obvious deficiencies, although related framework species have been shown to have the necessary luminescence, porosity and, to some degree, selectivity. Aspects of ligand design and complex composition necessary for the synthesis of uranyl ion cages with appropriate luminescence and chemical properties for use in selective photo-oxidation catalysis have been analysed in relation to the characteristics of known capsules.

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Recent advances in MOF-based photocatalysis: environmental remediation under visible light

Abstract: Highly photoactive MOFs can be engineered via various strategies for the purpose of extended visible light absorption, more efficient generation, separation and transfer of charge carriers, as well as good recyclability.

Cited by 491 publications

References 293 publications

Coating of Conducting and Insulating Threads with Porous MOF Particles through Langmuir-Blodgett Technique

Coating of Conducting and Insulating Threads with Porous MOF Particles through Langmuir-Blodgett Technique

Metal Organic Frame-Upconverting Nanoparticle Assemblies for the FRET Based Sensor Detection of Bisphenol A in High-Salt Foods

Uranyl Ion Complexes of Polycarboxylates: Steps towards Isolated Photoactive Cavities

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