Porous MOF-808@PVDF beads for removal of iodine from gas streams

Wang, Lingyu; Chen, Peng; Dong, Xiuting; Zhang, Wen; Zhao, Song; Xiao, Songtao; Ouyang, Yu

doi:10.1039/d0ra08741f

Cited by 43 publications

(15 citation statements)

References 40 publications

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“…In contrast, much lower adsorption capacities were obtained with ionic MOFs (i.e., Zn-BTeC and MIL-127), and they were found to be only slightly dependent on the nature of the compensating ion present in the pores. Such predicted values are still higher than the best reports, such as in Zr-based MOF-808 at 80 °C (2.18 g·g −1 ) without water [ 70 ], or MOF-808 covered by poly(vinylidene fluoride) (1.42 g·g −1 ) [ 72 ]. It should be noted that a comparison with experimental data is difficult due to the scarcity of the experimental reports.…”

Section: Resultsmentioning

confidence: 76%

Impact of Structural Functionalization, Pore Size, and Presence of Extra-Framework Ions on the Capture of Gaseous I2 by MOF Materials

Salles

Zając

2021

Nanomaterials

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A computational approach is used on MOF materials to predict the structures showing the best performances for I2 adsorption as a function of the functionalization, the pore size, the presence of the compensating ions, and the flexibility on which to base future improvements in selected materials in view of their targeted application. Such an approach can be generalized for the adsorption of other gases or vapors. Following the results from the simulations, it was evidenced that the maximum capacity of I2 adsorption by MOF solids with longer organic moieties and larger pores could exceed that of previously tested materials. In particular, the best retention performance was evidenced for MIL-100-BTB. However, if the capacity to retain traces of gaseous I2 on the surface is considered, MIL-101-2CH3, MIL-101-2CF3, and UiO-66-2CH3 appear more promising. Furthermore, the impact of temperature is also investigated.

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Section: Resultsmentioning

confidence: 76%

Impact of Structural Functionalization, Pore Size, and Presence of Extra-Framework Ions on the Capture of Gaseous I2 by MOF Materials

Salles

Zając

2021

Nanomaterials

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“…The X-ray photoelectron spectroscopy (XPS, Thermo Scientific Escalab 250Xi, Waltham, MA, USA) of the beads was also measured to analyze the elemental chemical bonding states. The procedure of iodine adsorption by DUT-68@Alginate beads was carried out according to the previous work [ 13 , 17 ]. Briefly, sealed bottles with 20 mg beads in a glass vial and 200 mg solid iodine were kept at 358 K in the oven and weighted at different times.…”

Section: Methodsmentioning

confidence: 99%

Preparation of Highly Porous Thiophene-Containing DUT-68 Beads for Adsorption of CO2 and Iodine Vapor

Xiao

Cong

et al. 2021

Polymers

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Zirconium-based metal-organic frameworks (Zr-MOFs) have great structural stability and offer great promise in the application of gas capture. However, the powder nature of MOF microcrystallines hinders their further industrial-scale applications in fluid-phase separations. Here, Zr-based DUT-68 was structured into nontoxic and eco-friendly alginate beads, and the gas capture properties were evaluated by CO2 and volatile iodine. DUT-68 beads were synthesized via a facile and versatile cross-linked polymerization of sodium alginate with calcium ions. The composite beads keep the structural integrity and most of the pore accessibility of DUT-68. The resulting DUT-68@Alginate (2:1) porous bead processes a surface area of 541 m2/g and compressive strength as high as 1.2 MPa, and the DUT-68 crystals were well-dispersed in the alginate networks without agglomeration. The DUT-68@Alginate bead with a 60% weight ratio of MOFs exhibits a high carbon dioxide capacity (1.25 mmol/g at 273 K), as well as an excellent high adsorption capacity for iodine, reaching up to 0.65 g/g at 353 K. This work provides a method to construct thiophene-contained composite beads with millimeter sizes for the capture of gases in potential industrial applications.

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“…[ 20–22 ] Furthermore, many studies have confirmed that MOFs can be efficiently incorporated into organic polymer films to form mixed matrix‐membranes, self‐folding films, and other types of functional films. [ 23–27 ]…”

Section: Introductionmentioning

confidence: 99%

Antibacterial Films Based on MOF Composites that Release Iodine Passively or Upon Triggering by Near‐Infrared Light

Boix

Balcerzak

et al. 2022

Adv Funct Materials

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Multidrug‐resistant bacteria have become a global health problem for which new prophylactic strategies are now needed, including surface‐coatings for hospital spaces and medical equipment. This work reports the preparation and functional validation of a metal‐organic framework (MOF) based composite for the triggered controlled release of iodine, an antimicrobial element that does not generate resistance. It comprises beads of the iodophilic MOF UiO‐66 containing encapsulated gold nanorods (AuNRs) coated with a silica shell. Irradiation of the AuNRs with near‐infrared light (NIR) provokes a photothermal effect and the resultant heat actively liberates the iodine. After validating the performance of this composite, it is integrated into a polymer for the development of antibacterial films. This work assesses the adsorption of iodine into these composite films, as well as its passive long‐term release and active light‐triggered. Finally, this work validates the antibacterial activity of the composite films in vitro against gram‐positive and gram‐negative bacteria. The findings will surely inform the development of new prophylactic treatments.

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Porous MOF-808@PVDF beads for removal of iodine from gas streams

Abstract: Porous millimeter-sized MOF-808@PVDF composite beads with ultrahigh iodine adsorption capacity for capture of radioiodine from gas streams.

Cited by 43 publications

References 40 publications

Impact of Structural Functionalization, Pore Size, and Presence of Extra-Framework Ions on the Capture of Gaseous I2 by MOF Materials

Impact of Structural Functionalization, Pore Size, and Presence of Extra-Framework Ions on the Capture of Gaseous I2 by MOF Materials

Preparation of Highly Porous Thiophene-Containing DUT-68 Beads for Adsorption of CO2 and Iodine Vapor

Antibacterial Films Based on MOF Composites that Release Iodine Passively or Upon Triggering by Near‐Infrared Light

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