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

doi:10.1016/j.ceramint.2022.06.245

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^*

^*Corresponding author for this work

Departamento de Física

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	29829-29837
Number of pages	9
Journal	Ceramics International
Volume	48
Issue number	20
DOIs	https://doi.org/10.1016/j.ceramint.2022.06.245
State	Published - 15 Oct 2022

Bibliographical note

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

Keywords

ALD
Carbon nanotubes
Surface defects
ZnO

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10.1016/j.ceramint.2022.06.245

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Borbón-Nuñez, H. A., Domínguez, D., Herrera-Zaldivar, M., Romo-Herrera, J. M., Carrillo-Torres, R. C., Castillón, F. F., Contreras-López, O. E., Soto, G., & Tiznado, H. (2022). Effect of inert ambient annealing on structural and defect characteristics of coaxial N-CNTs@ZnO nanotubes coated by atomic layer deposition. Ceramics International, 48(20), 29829-29837. https://doi.org/10.1016/j.ceramint.2022.06.245

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

abstract = "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.",

keywords = "ALD, Carbon nanotubes, Surface defects, ZnO",

author = "Borb{\'o}n-Nu{\~n}ez, {H. A.} and D. Dom{\'i}nguez and M. Herrera-Zaldivar and Romo-Herrera, {J. M.} and Carrillo-Torres, {R. C.} and Castill{\'o}n, {F. F.} and Contreras-L{\'o}pez, {O. E.} and G. Soto and H. Tiznado",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd and Techna Group S.r.l.",

year = "2022",

month = oct,

day = "15",

doi = "10.1016/j.ceramint.2022.06.245",

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Borbón-Nuñez, HA, Domínguez, D, Herrera-Zaldivar, M, Romo-Herrera, JM, Carrillo-Torres, RC, Castillón, FF, Contreras-López, OE, Soto, G & Tiznado, H 2022, 'Effect of inert ambient annealing on structural and defect characteristics of coaxial N-CNTs@ZnO nanotubes coated by atomic layer deposition', Ceramics International, vol. 48, no. 20, pp. 29829-29837. https://doi.org/10.1016/j.ceramint.2022.06.245

TY - JOUR

T1 - Effect of inert ambient annealing on structural and defect characteristics of coaxial N-CNTs@ZnO nanotubes coated by atomic layer deposition

AU - Borbón-Nuñez, H. A.

AU - Domínguez, D.

AU - Herrera-Zaldivar, M.

AU - Romo-Herrera, J. M.

AU - Carrillo-Torres, R. C.

AU - Castillón, F. F.

AU - Contreras-López, O. E.

AU - Soto, G.

AU - Tiznado, H.

PY - 2022/10/15

Y1 - 2022/10/15

N2 - 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.

AB - 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.

KW - ALD

KW - Carbon nanotubes

KW - Surface defects

KW - ZnO

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U2 - 10.1016/j.ceramint.2022.06.245

DO - 10.1016/j.ceramint.2022.06.245

M3 - Artículo

AN - SCOPUS:85133351021

SN - 0272-8842

VL - 48

SP - 29829

EP - 29837

JO - Ceramics International

JF - Ceramics International

IS - 20

ER -

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

Abstract

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Keywords

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