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Effectual visible light photocatalytic reduction of para-nitro phenol using reduced graphene oxide and ZnO composite

Velusamy, Sasireka; Roy, Anurag; Mariam, Ezrah; Krishnamurthy, Satheesh; Sundaram, Senthilarasu; Mallick, Tapas K.


Sasireka Velusamy

Anurag Roy

Ezrah Mariam

Satheesh Krishnamurthy

Tapas K. Mallick


Removing wastewater pollutants using semiconducting-based heterogeneous photocatalysis is an advantageous technique because it provides strong redox power charge carriers under sunlight irradiation. In this study, we synthesized a composite of reduced graphene oxide (rGO) and zinc oxide nanorods (ZnO) called rGO@ZnO. We established the formation of type II heterojunction composites by employing various physicochemical characterization techniques. To evaluate the photocatalytic performance of the synthesized rGO@ZnO composite, we tested it for reducing a common wastewater pollutant, para-nitro phenol (PNP), to para-amino phenol (PAP) under both ultraviolet (UV) and visible light irradiances. The rGOx@ZnO (x = 0.5–7 wt%) samples, comprising various weights of rGO, were investigated as potential photocatalysts for the reduction of PNP to PAP under visible light irradiation. Among the samples, rGO5@ZnO exhibited remarkable photocatalytic activity, achieving a PNP reduction efficiency of approximately 98% within a short duration of four minutes. These results demonstrate an effective strategy and provide fundamental insights into removing high-value-added organic water pollutants.

Journal Article Type Article
Acceptance Date Jun 6, 2023
Online Publication Date Jun 12, 2023
Publication Date 2023
Deposit Date Jun 19, 2023
Publicly Available Date Jun 19, 2023
Journal Scientific Reports
Publisher Nature Publishing Group
Peer Reviewed Peer Reviewed
Volume 13
Issue 1
Article Number 9521


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