A facile and sustainable one-pot approach to the aqueous and low-temperature PET-to-UiO-66(Zr) upcycling

Crespo‐Ribadeneyra, Maria; King, James; Titirici, Maria‐Magdalena; Szilágyi, Petra Ágota

doi:10.1039/d1cc06250f

Cited by 19 publications

(11 citation statements)

References 29 publications

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“…This PET-derived MOF was successfully used for the separation of benzene/cyclohexane, by exploiting the competing adsorption of these to molecules. Recently, the direct PET-to-UiO-66(Zr) MOF conversion in aqueous environment using different inorganic precursor and acids has been further investigated [ 128 ], proving that modified BDC ligands can be produced during the PET-to-MOF conversion. Indeed, the use of nitric acid for PET conversion resulted in the formation of NO 2 groups on the aromatic rings of the BDC ligands, which were then reduced by the ethylene glycol produced by the PET depolymerisation, finally leading to the formation of NH 2 -UiO-66(Zr) MOF.…”

Section: Plastic Waste As Linker Source For Mofs Adsorbentsmentioning

confidence: 99%

Metal-organic frameworks and plastic: an emerging synergic partnership

Mastropietro

2023

Science and Technology of Advanced Materials

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Mismanagement of plastic waste results in its ubiquitous presence in the environment. Despite being durable and persistent materials, plastics are reduced by weathering phenomena into debris with a particle size down to nanometers. The fate and ecotoxicological effects of these solid micropollutants are not fully understood yet, but they are raising increasing concerns for the environment and people’s health. Even if different current technologies have the potential to remove plastic particles, the efficiency of these processes is modest, especially for nanoparticles. Metal-organic frameworks (MOFs) are crystalline nano-porous materials with unique properties, have unique properties, such as strong coordination bonds, large and robustus porous structures, high accessible surface areas and adsorption capacity, which make them suitable adsorbent materials for micropollutants. This review examines the preliminary results reported in literature indicating that MOFs are promising adsorbents for the removal of plastic particles from water, especially when MOFs are integrated in porous composite materials or membranes, where they are able to assure high removal efficiency, superior water flux and antifouling properties, even in the presence of other dissolved co-pollutants. Moreover, a recent trend for the alternative preparation of MOFs starting from plastic waste, especially polyethylene terephthalate, as a sustainable source of organic linkers is also reviewed, as it represents a promising route for mitigating the impact of the costs deriving from the widescale MOFs production and application. This connubial between MOFs and plastic has the potential to contribute at implementing a more effective waste management and the circular economy principles in the polymer life cycle.

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Section: Plastic Waste As Linker Source For Mofs Adsorbentsmentioning

confidence: 99%

Metal-organic frameworks and plastic: an emerging synergic partnership

Mastropietro

2023

Science and Technology of Advanced Materials

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“…In addition, recent advances in applying green chemical principles for MOF syntheses have paved the way for the emergence of sustainable MOFs, making them a more environmental benign option so long as their component metals are captured and re-used after their lifespan. [67][68][69][70]…”

Section: Challengesmentioning

confidence: 99%

“…Considering that recent advances in i) approaches for improving MOF stability in alkaline environments 86 ; ii) shaping and forming MOFs for more suitable mechanical characteristics [56][57][58][59][60][61][62][63][64] and new ways of improving static robustness 93 ; iii) more sustainable approaches to production [67][68][69][70] ; iv) and lowered costs 65,94 -all of which have been explored in excellent recent review papers, we identify the hydroxide-ion conductivity as the principal remaining bottleneck and therefore our continued discussion will be focussed on that.…”

Section: Materials Advances Accepted Manuscriptmentioning

confidence: 99%

Hydroxide ion-conducting metal–organic frameworks for anion-exchange membrane applications

Titirici

Szilágyi

2022

Mater. Adv.

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“…MOFs have a wide range of applications including catalysis, gas separation, oil/water separation, gas storage, sensing, and drug delivery . MOF synthesis often requires expensive raw materials, toxic organic solvents such as N , N -dimethylformamide (DMF), and harsh reaction conditions . H 2 BDC obtained from depolymerizing poly(ethylene terephthalate) (PET) can be obtained at high purity levels , and used as an organic linker in MOF assembly.…”

Section: Introductionmentioning

confidence: 99%

“…15 MOF synthesis often requires expensive raw materials, toxic organic solvents such as N,N-dimethylformamide (DMF), and harsh reaction conditions. 16 H 2 BDC obtained from depolymerizing poly(ethylene terephthalate) (PET) can be obtained at high purity levels 7,17 and used as an organic linker in MOF assembly. Some researchers have demonstrated PET-to-MOF upcycling using PET bottles.…”

Section: ■ Introductionmentioning

confidence: 99%

Upcycling of Dyed Polyester Fabrics into Copper-1,4-Benzenedicarboxylate (CuBDC) Metal–Organic Frameworks

Azbell

Milner

et al. 2023

Ind. Eng. Chem. Res.

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We report on a pathway to synthesize metal− organic frameworks (MOFs) using discarded textiles as a raw material. Discarded objects made of poly(ethylene terephthalate) (PET) could be an inexpensive and globally available source for 1,4-benzenedicarboxylic acid (H 2 BDC), also known as terephthalic acid, a building block of carboxylate-based MOFs. Previous studies on using discarded PET to synthesize MOFs have mainly focused on PET bottles. In contrast, we demonstrate the use of dyed polyester fabrics as a raw material. Specifically, we report on a synthesis path for copper-1,4-benzenedicarboxylate (CuBDC) utilizing disodium terephthalate (Na 2 BDC) as a linker and on how we obtained the linker from depolymerized polyester fabrics. To facilitate coordination between the copper ions and Na 2 BDC and create a localized acidic environment that favors the synthesis of CuBDC MOFs rather than metal oxide byproducts, we added acetic acid to the copper precursor solution. The drop-sized pHcontrolled domain enabled the formation of CuBDC MOF crystals at room temperature and at a fraction of time shorter than traditional solvothermal methods. We confirmed the resulting MOF structures using powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and Fourier transform infrared (FTIR) spectroscopy, and our results were in quantitative agreement with previous reports. Furthermore, we used different copper salts as metal sources and different color-dyed polyester fabrics as linker sources, demonstrating the versatility of the proposed synthesis path. These results may open an avenue for using discarded textiles as a raw material and offer a more circular approach for managing textile waste.

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A facile and sustainable one-pot approach to the aqueous and low-temperature PET-to-UiO-66(Zr) upcycling

Abstract: Accelerating waste management requires the conversion of polymer waste to value-added materials through sustainable approaches. While depolymerised PET has been used as feedstock to produce metal-organic frameworks, this is the...

Cited by 19 publications

References 29 publications

Metal-organic frameworks and plastic: an emerging synergic partnership

Metal-organic frameworks and plastic: an emerging synergic partnership

Hydroxide ion-conducting metal–organic frameworks for anion-exchange membrane applications

Upcycling of Dyed Polyester Fabrics into Copper-1,4-Benzenedicarboxylate (CuBDC) Metal–Organic Frameworks

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