In the present work the Cu2O-ZnO heterosystem and the novel Cu2O-CeO2-ZnO triphasic heterojunction were synthesized impregnating the ZnO and the CeO2-ZnO system surfaces with 0.5% in weight of Cu2O, respectively. While X-ray powder diffraction (XRPD) evidenced any alteration in the matrix phases, the UV–vis and electron paramagnetic resonance (EPR) spectroscopy highlighted a drastic change in the optical and electronic behaviour respect to the non-impregnated samples. Deeply investigations allowed us identifying the photo-stability of the surface decorative Cu2O phase and the presence of additional copper species, namely Cu2+ and Cu(0), coming as “waste” from the employed impregnation route. The presented outcomes brought us to suggest a beneficial impact of these species promoting the overall photocatalytic process. Finally, both the oxidative and reductive photocatalytic activity of the produced materials has been evaluated by means the H2 generation from the water photosplitting process and through the photodegradation of the tolytriazol molecule, respectively, where the novel Cu2O-CeO2-ZnO heterojunction exhibited the best performance upon UV–vis and purely visible irradiation.

Photocatalytic reductive and oxidative ability study of pristine ZnO and CeO2-ZnO heterojunction impregnated with Cu2O / Cerrato, Erik; Calza, Paola; Cristina Paganini, Maria. - In: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. A, CHEMISTRY. - ISSN 1010-6030. - 427:(2022), pp. 1137751-1137758. [10.1016/j.jphotochem.2022.113775]

Photocatalytic reductive and oxidative ability study of pristine ZnO and CeO2-ZnO heterojunction impregnated with Cu2O

Cerrato, Erik
Conceptualization
;
2022

Abstract

In the present work the Cu2O-ZnO heterosystem and the novel Cu2O-CeO2-ZnO triphasic heterojunction were synthesized impregnating the ZnO and the CeO2-ZnO system surfaces with 0.5% in weight of Cu2O, respectively. While X-ray powder diffraction (XRPD) evidenced any alteration in the matrix phases, the UV–vis and electron paramagnetic resonance (EPR) spectroscopy highlighted a drastic change in the optical and electronic behaviour respect to the non-impregnated samples. Deeply investigations allowed us identifying the photo-stability of the surface decorative Cu2O phase and the presence of additional copper species, namely Cu2+ and Cu(0), coming as “waste” from the employed impregnation route. The presented outcomes brought us to suggest a beneficial impact of these species promoting the overall photocatalytic process. Finally, both the oxidative and reductive photocatalytic activity of the produced materials has been evaluated by means the H2 generation from the water photosplitting process and through the photodegradation of the tolytriazol molecule, respectively, where the novel Cu2O-CeO2-ZnO heterojunction exhibited the best performance upon UV–vis and purely visible irradiation.
File in questo prodotto:
File Dimensione Formato  
Cerrato_Cu2O_H2+carbamazepina.pdf

solo utenti autorizzati

Descrizione: PDF editoriale
Tipologia: Versione editoriale
Licenza: Non Pubblico - Accesso privato/ristretto
Dimensione 750.93 kB
Formato Adobe PDF
750.93 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
Cerrato-Post-Print_Cu2O-CZ1-ZnO.pdf

Open Access dal 07/01/2024

Descrizione: Post-print
Tipologia: Documento in Post-print
Licenza: Creative Commons
Dimensione 1.06 MB
Formato Adobe PDF
1.06 MB Adobe PDF Visualizza/Apri

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/11696/73399
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 6
  • ???jsp.display-item.citation.isi??? 5
social impact