Synthesis of eco-friendly CaCO 3 @Zn-Al MMO core-shell nanoflowers photocatalyst using bio-eggshell waste for improved photocatalytic degradation of RhB under visible light irradiation.

Autor: Tajat N; Laboratory of Applied Physical Chemistry, Faculty of Sciences Ibn Zohr University, BP 8106 Dakhla, 80060, Agadir, Morocco. Electronic address: nawaltajat@gmail.com., El Hayaoui W; Laboratory of Applied Physical Chemistry, Faculty of Sciences Ibn Zohr University, BP 8106 Dakhla, 80060, Agadir, Morocco., El Mouhri W; Laboratory of Applied Physical Chemistry, Faculty of Sciences Ibn Zohr University, BP 8106 Dakhla, 80060, Agadir, Morocco., Nadif I; Laboratory of Applied Physical Chemistry, Faculty of Sciences Ibn Zohr University, BP 8106 Dakhla, 80060, Agadir, Morocco., Bougdour N; Laboratory of Applied Physical Chemistry, Faculty of Sciences Ibn Zohr University, BP 8106 Dakhla, 80060, Agadir, Morocco., Idlahcen A; Laboratory of Applied Physical Chemistry, Faculty of Sciences Ibn Zohr University, BP 8106 Dakhla, 80060, Agadir, Morocco., Bakas I; Laboratory of Applied Physical Chemistry, Faculty of Sciences Ibn Zohr University, BP 8106 Dakhla, 80060, Agadir, Morocco., Badreddine M; Centre régional des métiers d'éducation et de formation, 40000, Marrakech, Morocco., Tamimi M; Laboratory of Applied Physical Chemistry, Faculty of Sciences Ibn Zohr University, BP 8106 Dakhla, 80060, Agadir, Morocco., Assabbane A; Laboratory of Applied Physical Chemistry, Faculty of Sciences Ibn Zohr University, BP 8106 Dakhla, 80060, Agadir, Morocco., Qourzal S; Laboratory of Applied Physical Chemistry, Faculty of Sciences Ibn Zohr University, BP 8106 Dakhla, 80060, Agadir, Morocco.
Jazyk: angličtina
Zdroj: Environmental research [Environ Res] 2024 Dec 15; Vol. 263 (Pt 3), pp. 120218. Date of Electronic Publication: 2024 Oct 22.
DOI: 10.1016/j.envres.2024.120218
Abstrakt: In this study, a type-I heterojunction was synthesized based on eggshell waste doped mixed metal oxide (ES@ZnAl MMO) for the degradation of RhB dye under visible light irradiation. The ES@ZnAl MMO core-shell was synthesized using waste eggshell and layered double hydroxide (LDH) as primary precursors. After their mechanochemical assembly and thermal treatment, CaCO 3 was formed in both calcite and vaterite forms, alongside mixed metal oxides derived from the LDH (ZnO and Al 2 O 3 ). The formation of a heterojunction between the semiconductors results in an improved activation of sites, a decrease in bandgap energy from 5.72 to 3.44 eV, and an increase in degradation capacity. The elemental composition, morphology, structural, and optical properties of the ES@ZnAl MMO nanocomposite were analyzed using various techniques. The optimal ES@ZnAl MMO photocatalyst demonstrated superior performance, reaching over 98% of RhB dye degradation under optimal conditions, outperforming pure ZnAl LDH, ZnAl MMO, and ES. After five run cycles, the ES@ZnAl MMO heterojunction still maintained a high photocatalytic performance for RhB dye (99%). Furthermore, it displayed high performance in degrading various other pollutants, including OG, IC, MB, and 2.4-DP, with degradation efficiencies of 97%, 99%, 99%, and 87%, respectively. This economically advantageous heterojunction showed its importance in environmental remediation, presenting a promising solution for addressing diverse pollution challenges.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: