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Article Dans Une Revue Applied Catalysis B: Environmental Année : 2019

Photocatalytic degradation of organic pollutant with polypyrrole nanostructures under UV and visible light

Résumé

Conjugated polymer nanostructures (CPNs) emerge as a new class of photocatalysts for organic pollutant degradation under UV and visible light. Polyprrole (PPy), as a conjugated polymer, exhibits a wide range of applications. We present here the first demonstration of employing pure PPy nanostructures as a very efficient photocatalyst for water depollution. PPy nanostructures were synthesized in hexagonal mesophases (used as soft templates) by chemical polymerization (PPy-NS-c), obtained by radiolysis (PPy-NS-γ), and synthesized without any template via chemical method (PPy-bulk) as bulk. The different PPy samples were characterized by SEM, TEM, FTIR and UV-vis absorption spectroscopy. The photocatalytic activity of both PPy nanostructures (PPy-NSc and PPy-NS-γ), which remain very stable after several cycles, was evaluated for the degradation of organic pollutant in aqueous solution (phenol and methyl orange were taken as a model pollutant). PPy nanostructures show high photocatalytic activity under both UV and visible light while bulk PPy (PPy-bulk) has no appreciable activity. PPy-NS-c present the highest activity for photodegradation of phenol under UV light, while PPy-NS-γ exhibit the best photocatalytic activity under visible light. We demonstrate here that the nanostructuration of these polymers is an important factor for their application in photocatalysis.

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Chimie
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Dates et versions

hal-04216406 , version 1 (26-09-2023)

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Xiaojiao Yuan, Dita Floresyona, Pierre-Henri Aubert, Thanh-Tuân Bui, Samy Remita, et al.. Photocatalytic degradation of organic pollutant with polypyrrole nanostructures under UV and visible light. Applied Catalysis B: Environmental, 2019, 242, pp.284-292. ⟨10.1016/j.apcatb.2018.10.002⟩. ⟨hal-04216406⟩
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