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SAMI AMEUR
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Volume 46 All articles Published: 20 April 2023 Article ID 0083
KHAOULA KACEM JUAN CASANOVA-CHAFER ABDESSALEM HAMROUNI SAMI AMEUR FRANK GÜELL MOHAMED FAOUZI NSIB EDUARD LLOBET
To overcome the limitations of ZnO as a photocatalyst, the present work reports a ternary nanocomposite (ZnO–TiO$_2$/rGO) with a high photocatalytic activity under direct natural solar light irradiation. Reduced graphene oxide(rGO) was obtained after bio-reduction of GO using pomegranate peels. Techniques of FE-SEM, TEM, XRD, FTIR, UV–Vis DRS, Raman and PL were used for characterization purpose. The ternary nanocomposite exhibited a highphotocatalytic activity towards the degradation of indigo carmine dye, resulting in an efficiency of 92% within 150 min under sunlight illumination. Accordingly, the hybridization of ZnO with TiO$_2$ and rGO improves light absorption,promotes high separation of photogenerated charges, and solves the photocorrosion drawback of ZnO, leading to a better stability and reusability of the nanocomposite. Particularly, the prepared rGO allowed certain hydrophilicity and a better surface hydroxylation. In view of that, a comprehensive photocatalytic mechanism was proposed and discussed, referred to experiments showing the effect of holes and ${}^•$OH scavengers. The findings revealed that the developed rGO hybridized with ZnO–TiO$_2$ heterojunction can be a promising candidate for removing environmental contaminations using natural solar light.
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Bulletin of Materials Science
Volume 46, 2023
All articles
Continuous Article Publishing mode
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Bulletin of Materials Science | News
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Dr Shanti Swarup Bhatnagar for Science and Technology
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