Effect of inert ambient annealing on structural and defect characteristics of coaxial N-CNTs@ZnO nanotubes coated by atomic layer deposition

H. A. Borbón-Nuñez, D. Domínguez, M. Herrera-Zaldivar, J. M. Romo-Herrera, R. C. Carrillo-Torres, F. F. Castillón, O. E. Contreras-López, G. Soto, H. Tiznado*

*Autor correspondiente de este trabajo

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

Resumen

The structure and intrinsic defects of ZnO determine the photogeneration of electron-hole pairs. The control of these characteristics allows for improving the activity of photocatalytic nanostructures. The intrinsic defects of ZnO atomic layer deposited around carbon nanotubes, coaxial N-CNT@ZnO, and its evolution after annealing in a nitrogen atmosphere are studied. TEM showed that the coaxial N-CNT@ZnO structure is preserved up to 500 °C; some damage is seen at 600 and 700 °C. Raman and XPS reveal a low surface defect concentration for as-grown ZnO, increasing to a maximum for the 600 °C annealed sample. Cathodoluminescence shows a broad low-intensity green emission associated with oxygen vacancies of ZnO. The surface defects improved the photocatalytic degradation of amaranth dye, however, damage to the coaxial structure lowers the catalytic activity.

Idioma originalInglés
Páginas (desde-hasta)29829-29837
Número de páginas9
PublicaciónCeramics International
Volumen48
N.º20
DOI
EstadoPublicada - 15 oct 2022

Nota bibliográfica

Publisher Copyright:
© 2022 Elsevier Ltd and Techna Group S.r.l.

Huella

Profundice en los temas de investigación de 'Effect of inert ambient annealing on structural and defect characteristics of coaxial N-CNTs@ZnO nanotubes coated by atomic layer deposition'. En conjunto forman una huella única.

Citar esto