Synthesis of graphene oxide from post-consumer PET bottles by a one-step thermal treatment in air atmosphere for removal of methylene blue

Novelo, Francisco Javier Xix; Pareja-Rodríguez, Raúl; Martínez-Flores, Rocio; Gattorno, Geonel Rodríguez

doi:10.1016/j.jece.2024.112244

Cited by 2 publications

(1 citation statement)

References 50 publications

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“…Typically, furnaces with heating rates rarely exceeding 10 • C min −1 are used in the preparation of carbon materials. We note the work [54], which is devoted to the production of carbon from PET at a relatively low temperature of 500 • C. However, the adsorption value is less than many known adsorbents.…”

Section: Comparison With Other Materials and Their Adsorption Propertiesmentioning

confidence: 99%

Application of Infrared Pyrolysis and Chemical Post-Activation in the Conversion of Polyethylene Terephthalate Waste into Porous Carbons for Water Purification

Efimov,

Vasilev,

Muratov

et al. 2024

Polymers

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In this study, we compared the conversion of polyethylene terephthalate (PET) into porous carbons for water purification using pyrolysis and post-activation with KOH. Pyrolysis was conducted at 400–850 °C, followed by KOH activation at 850 °C for samples pyrolyzed at 400, 650, and 850 °C. Both pyrolyzed and post-activated carbons showed high specific surface areas, up to 504.2 and 617.7 m2 g−1, respectively. As the pyrolysis temperature increases, the crystallite size of the graphite phase rises simultaneously with a decrease in specific surface area. This phenomenon significantly influences the final specific surface area values of the activated samples. Despite their relatively high specific surface areas, pyrolyzed PET-derived carbons prove unsuitable as adsorbents for purifying aqueous media from methylene blue dye. A sample pyrolyzed at 650 °C, with a surface area of 504.2 m2 g−1, exhibited a maximum adsorption value of only 20.4 mg g−1. We propose that the pyrolyzed samples have a surface coating of amorphous carbon poor in oxygen groups, impeding the diffusion of dye molecules. Conversely, post-activated samples emerge as promising adsorbents, exhibiting a maximum adsorption capacity of up to 127.7 mg g−1. This suggests their potential for efficient dye removal in water purification applications.

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Section: Comparison With Other Materials and Their Adsorption Propertiesmentioning

confidence: 99%

Application of Infrared Pyrolysis and Chemical Post-Activation in the Conversion of Polyethylene Terephthalate Waste into Porous Carbons for Water Purification

Efimov,

Vasilev,

Muratov

et al. 2024

Polymers

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show abstract

Sustainable valorization of waste plastic into nanostructured materials for environmental, energy, catalytic and biomedical applications: A review

Kapoor,

Raghunathan,

Lal

et al. 2024

Chemosphere

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Synthesis of graphene oxide from post-consumer PET bottles by a one-step thermal treatment in air atmosphere for removal of methylene blue

Cited by 2 publications

References 50 publications

Application of Infrared Pyrolysis and Chemical Post-Activation in the Conversion of Polyethylene Terephthalate Waste into Porous Carbons for Water Purification

Application of Infrared Pyrolysis and Chemical Post-Activation in the Conversion of Polyethylene Terephthalate Waste into Porous Carbons for Water Purification

Sustainable valorization of waste plastic into nanostructured materials for environmental, energy, catalytic and biomedical applications: A review

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