Niobium oxide dispersed over PET waste activated carbon: an efficient catalyst for oxidation of the fungicide prothioconazole

Composite materials based on Nb 2 O 5 nanoparticles dispersed over activated carbon (Nb/AC) obtained from PET waste were used as catalysts for wastewater treatment. These composites were synthesized by mechanical mixing of AC and commercial Nb 2 O 5 , followed by H 2 O 2 treatment. The methylene blu...

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Bibliographic Details
Published in:New journal of chemistry 2024-09, Vol.48 (35), p.15414-15427
Main Authors: Oliveira, Cinthia C, Gutierrez, Leandro G, Ferretti, Cristian A, Eid, Janaina Guedes, Mota, Estella G. da, Gastelois, Pedro Lana, Souza, Patterson P, Oliveira, Jhonatan Bispo, Oliveira, Luiz C. A
Format: Article
Language:English
Subjects:
Activated carbon
Adsorption
Catalysts
Chemical synthesis
Composite materials
Contaminants
Fungicides
Hydrogen peroxide
Mars surface
Metabolites
Methylene blue
Niobium oxides
Oxidation
Reaction mechanisms
Wastewater treatment
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Summary:Composite materials based on Nb 2 O 5 nanoparticles dispersed over activated carbon (Nb/AC) obtained from PET waste were used as catalysts for wastewater treatment. These composites were synthesized by mechanical mixing of AC and commercial Nb 2 O 5 , followed by H 2 O 2 treatment. The methylene blue dye (MB) was used as a model contaminant and the fungicide prothioconazole (PCZ) was the target molecule. Contaminant removal from water occurred mainly via adsorption by AC and via a combined process of adsorption/oxidation in the case of Nb/AC composites. The increase in the Nb amount in the catalysts reduced the BET surface area but increased the reaction rates due to the oxidation properties of Nb 2 O 5 . The reaction mechanism is Mars-Van Krevelen-like, driven by the peroxo groups (active sites) on the Nb 2 O 5 surface. Moreover, the Nb/AC composites were highly efficient catalysts for PCZ oxidation and its main metabolite (prothioconazole-desthio) from water. Highly porous activated carbon from polyethylene terephthalate (PET) waste acts as a catalyst support for niobium oxide nanoparticles. Nb 2 O 5 /activated carbon is an efficient catalyst for wastewater treatment.
ISSN:1144-0546
1369-9261
DOI:10.1039/d4nj02826k