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- Title
Efficient photodecolorization of Congo red by CaMgO<sub>2</sub>@g-C<sub>3</sub>N<sub>4</sub> nanocomposite.
- Authors
Aldaghri, Osamah; Alqarni, Laila; Modwi, Abueliz; Idriss, Hajo; Abumousa, Rasha; Ali, Mohammed Khalil Mohammed; Ibnaouf, Khalid Hassan; Bououdina, Mohamed
- Abstract
Artificial dyes resist conventional oxidation and reduction processes. The current study aims to investigate the utilization of ultrasonically prepared CaMgO2@g-C3N4 nanocomposite for Congo red dye decolorization. The XRD analysis reveals the formation of a multiphase composite containing Ca and Mg oxides alongside g-C3N4. The coupling of MgO and CaO to g-C3N4 nanosheets is confirmed by TEM/EDX and XPS analysis. The nanocomposite manifests a high photocatalytic degradation of Congo red dye in an aqueous solution (99 mg/g) with an insignificant retention rate (∼ 5%) by virtue of its large surface area (73 m2/g), low band gap energy (2.85 eV) as well as the photogenerated holes, electrons, and hydroxyl radical involvement. The dye photodecolorization displays a rate constant of 0.07092 min−1 and a decolorization rate of 99%. Furthermore, the photodegradation kinetics fits well with the pseudo-first-order model, and mechanistic modeling suggests a Z-scheme mechanism. This research highlights the powerful catalytic effect of CaMgO2@g-C3N4 for synthetic dyes' decolorization.
- Subjects
CONGO red (Staining dye); NANOCOMPOSITE materials; BAND gaps; HYDROXYL group; CATALYSIS; PHOTODEGRADATION; COLOR removal (Sewage purification)
- Publication
Journal of Materials Science: Materials in Electronics, 2024, Vol 35, Issue 7, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-024-12232-0