A novel polydopamine-coated bacterial cellulose/g-C3N4 membrane for highly efficient photocatalytic degradation of methylene blue

Photocatalytic oxidation emerges as an eco-friendly approach for chemically degrading water-borne organic pollutants. Establishing a more sustainable process for synthesizing photocatalyst membranes with higher efficiency and reusability is crucial for advancing safe water remediation solutions. In...

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Bibliographic Details
Published in:International journal of biological macromolecules 2024-12, Vol.283 (Pt 2), p.137738, Article 137738
Main Authors: Charurungsipong, Piti, Than-ardna, Bhumin, Manuspiya, Hathaikarn
Format: Article
Language:English
Subjects:
absorption
asymmetric membranes
Bacterial cellulose
biopolymers
carbon nitride
cellulose
dopamine
graphene
Graphitic carbon nitride
irradiation
methylene blue
oxidation
photocatalysis
photocatalysts
Photocatalytic degradation
photolysis
Polydopamine
remediation
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Summary:Photocatalytic oxidation emerges as an eco-friendly approach for chemically degrading water-borne organic pollutants. Establishing a more sustainable process for synthesizing photocatalyst membranes with higher efficiency and reusability is crucial for advancing safe water remediation solutions. In this study, we present a novel photocatalytic membrane incorporating bacterial cellulose (BC), a naturally occurring biopolymer with an intricate fibrous network, and graphitic carbon nitride (g-C3N4), a visible light-responsive non-metal photocatalyst. The composite membrane is augmented with a coating of polydopamine (PDA), an amorphous polymeric layer derived from dopamine to enhance light absorption and reduce photoexcited charge recombination. The BC/g-C3N4/PDA membrane demonstrates a substantial improvement in methylene blue removal efficiency, up to 95.39 % within 150 min of irradiation. Moreover, the PDA-modified membrane exhibits noteworthy recyclability, retaining significant photodegradation ability for up to three cycles. This method offers an accessible and scalable approach to fabricating a highly effective photocatalyst composite membrane suitable for industrial applications.
ISSN:0141-8130
1879-0003
1879-0003
DOI:10.1016/j.ijbiomac.2024.137738