Co3O4 nanoparticles were prepared by a simple co-precipitation method and subsequently hybridized with various weight percentages of g-C3N4 by a facile mixing method. The Co3O4/(x)g-C3N4 (where, x = 10, 20 and 30%) composites were analysed by several analytical techniques (XRD, TEM, FE-SEM, EDS, FT-IR, UV–Vis -DRS, XPS, PL, and BET surface area) to investigate their chemical composition, as well as morphological and optical characteristics. The photocatalytic degradation of methylene blue (MB) and malachite green (MG) was investigated by the Co3O4/(x)g-C3N4 with changing parameters, such as pH, catalyst dose, initial dye concentration and agitation time under solar light irradiation. Amongst the tested catalysts Co3O4/(20)g-C3N4 exhibited highest photo-degradation of MB dye (97%) at pH ∼ 11 and for MG (98%) at pH ∼ 9 in 60 min compared to 85 and 88% respectively for neat Co3O4 and 89 and 86% respectively for pure g-C3N4. The radical detection test was carried out with trapping agents Na2-EDTA, BQ and IPA that established the vital role of hydroxyl radicals in the photo-degradation of dyes. Eventually, the high stability and recyclability of the Co3O4/(20)g-C3N4 photocatalyst was confirmed after five consecutive runs. The mechanistic pathway of the dye degradation was explained by Z-scheme model on the basis of p-n hetero-junction.

Sustainable and solar light assisted photocatalytic degradation of methylene blue and malachite green dyes by Co3O4/g-C3N4 nanocomposite / D. Pradhan, L. Mohanty, R. Singhal, E. Falletta, S.K. Dash. - In: INORGANIC CHEMISTRY COMMUNICATIONS. - ISSN 1387-7003. - 156:(2023 Oct), pp. 111259.1-111259.15. [10.1016/j.inoche.2023.111259]

Sustainable and solar light assisted photocatalytic degradation of methylene blue and malachite green dyes by Co3O4/g-C3N4 nanocomposite

E. Falletta
Penultimo
;
2023

Abstract

Co3O4 nanoparticles were prepared by a simple co-precipitation method and subsequently hybridized with various weight percentages of g-C3N4 by a facile mixing method. The Co3O4/(x)g-C3N4 (where, x = 10, 20 and 30%) composites were analysed by several analytical techniques (XRD, TEM, FE-SEM, EDS, FT-IR, UV–Vis -DRS, XPS, PL, and BET surface area) to investigate their chemical composition, as well as morphological and optical characteristics. The photocatalytic degradation of methylene blue (MB) and malachite green (MG) was investigated by the Co3O4/(x)g-C3N4 with changing parameters, such as pH, catalyst dose, initial dye concentration and agitation time under solar light irradiation. Amongst the tested catalysts Co3O4/(20)g-C3N4 exhibited highest photo-degradation of MB dye (97%) at pH ∼ 11 and for MG (98%) at pH ∼ 9 in 60 min compared to 85 and 88% respectively for neat Co3O4 and 89 and 86% respectively for pure g-C3N4. The radical detection test was carried out with trapping agents Na2-EDTA, BQ and IPA that established the vital role of hydroxyl radicals in the photo-degradation of dyes. Eventually, the high stability and recyclability of the Co3O4/(20)g-C3N4 photocatalyst was confirmed after five consecutive runs. The mechanistic pathway of the dye degradation was explained by Z-scheme model on the basis of p-n hetero-junction.
Co3O4/g-C3N4; Toxic dyes; Photocatalytic degradation; Radical trapping; Z-scheme mechanism; Solar light irradiation;
Settore CHIM/04 - Chimica Industriale
ott-2023
Article (author)
File in questo prodotto:
File Dimensione Formato  
INOCHEMCOM_2023pdf.pdf

accesso riservato

Tipologia: Publisher's version/PDF
Dimensione 9.61 MB
Formato Adobe PDF
9.61 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
Accepted manuscript.pdf

embargo fino al 01/10/2025

Tipologia: Post-print, accepted manuscript ecc. (versione accettata dall'editore)
Dimensione 304.19 kB
Formato Adobe PDF
304.19 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/994449
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 5
  • ???jsp.display-item.citation.isi??? 1
social impact