Microwave-assisted hydrothermal synthesis of type II ZnSe/ZnO heterostructures as photocatalysts for wastewater treatment

M. Arellano-Cortaza, E. Ramírez-Morales, S. J. Castillo, L. Lartundo-Rojas, I. Zamudio Torres, E. M.López Alejandro, L. Rojas-Blanco*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The ZnSe/ZnO heterostructures were synthesized with the microwave-assisted hydrothermal method, using zinc acetate and zinc nitrate as a source of Zn2+ ions. Materials were characterized by X-ray diffraction (XRD), X-ray photoemitted electron spectroscopy (XPS), Raman spectroscopy, and scanning electron microscopy (SEM). The incorporation of ZnSe into the ZnO matrix produced changes both in the size of the ZnO crystallites and in the lattice parameters. Optical and texture analyses revealed that ZnSe particles cause a decrease in gap energy and a greater than 90% increase in the specific surface area of ZnSe/ZnO heterostructures compared to bare ZnO particles. ZnSe/ZnO heterostructures synthesized using zinc acetate as a Zn ion source exhibited better photocatalytic performance in visible light compared to pure ZnO.

Original languageEnglish
Pages (from-to)24027-24037
Number of pages11
JournalCeramics International
Volume49
Issue number14
DOIs
StatePublished - 15 Jul 2023

Bibliographical note

Publisher Copyright:
© 2023 Elsevier Ltd and Techna Group S.r.l.

Keywords

  • Heterostructure
  • Photocatalyst
  • Semiconductors
  • Zinc oxide
  • Zinc selenide

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