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Tunable morphology and band gap alteration of CuO-ZnO nanostructures based photocathode for solar photoelectrochemical cells

A homogeneous CuO-ZnO nanostructure with tunable morphology and optical band structure is successfully synthesized via a hydrothermal method under the different dopant mole ratios of Cu. The robust correlation between the crystallite size, surface morphology, optical band gap alteration of the synth...

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Main Authors: A Albadarin, Nusayba, Takrif, Mohd Sobri, Tan, Sin Tee, Shahahmadi, Seyed Ahmad, Jeffery Minggu, Lorna, Kadhum, Abdul Amir Hassan, Yin, Wong Wai, Salehmin, Mohd Nur Ikhmal, M Alkhalqi, Ensaf, Abdul Hamid, Muhammad Azmi, Amin, Nowshad
Format: Article
Published: Institute of Physics Publishing 2020
Online Access:http://psasir.upm.edu.my/id/eprint/86405/
https://iopscience.iop.org/article/10.1088/2053-1591/abd1e6
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spelling my.upm.eprints.864052022-10-18T09:07:47Z http://psasir.upm.edu.my/id/eprint/86405/ Tunable morphology and band gap alteration of CuO-ZnO nanostructures based photocathode for solar photoelectrochemical cells A Albadarin, Nusayba Takrif, Mohd Sobri Tan, Sin Tee Shahahmadi, Seyed Ahmad Jeffery Minggu, Lorna Kadhum, Abdul Amir Hassan Yin, Wong Wai Salehmin, Mohd Nur Ikhmal M Alkhalqi, Ensaf Abdul Hamid, Muhammad Azmi Amin, Nowshad A homogeneous CuO-ZnO nanostructure with tunable morphology and optical band structure is successfully synthesized via a hydrothermal method under the different dopant mole ratios of Cu. The robust correlation between the crystallite size, surface morphology, optical band gap alteration of the synthesized CuO-ZnO and its performance in photoelectrochemical (PEC) activity are investigated and compared to the reference ZnO based photocathode. In this report, it is found that the morphology of hexagonal ZnO nanorod is changed to nanosheet and vertically align CuO-ZnO based nanograss after the Cu incorporation. This result is mainly due to the composition phase change after the excessive incorporation of Cu metal into ZnO lattice. Furthermore, the optical band gap of the sample also presented a bathochromic shifted after the Cu insertion. The measurements on PEC activity of CuO-ZnO nanostructure was performed under the irradiation of a 100 mWcm−2 Xenon light in 0.5M Na2SO4 electrolyte. Among the sample, 0 Zn:1 Cu exhibited a highest photocurrent density which is 5 fold as compared to its reference ZnO samples. This finding could be due to the highest surface active area and lowest optical energy band gap in the 0 Zn:1 Cu nanograss that eventually contributes to a high free electron density that facilitates the charge transport in the photoelectrochemical cells. This novel approach could provide an alternative to the future solar hydrogenation application. Institute of Physics Publishing 2020 Article PeerReviewed A Albadarin, Nusayba and Takrif, Mohd Sobri and Tan, Sin Tee and Shahahmadi, Seyed Ahmad and Jeffery Minggu, Lorna and Kadhum, Abdul Amir Hassan and Yin, Wong Wai and Salehmin, Mohd Nur Ikhmal and M Alkhalqi, Ensaf and Abdul Hamid, Muhammad Azmi and Amin, Nowshad (2020) Tunable morphology and band gap alteration of CuO-ZnO nanostructures based photocathode for solar photoelectrochemical cells. Materials Research Express, 7 (12). pp. 1-9. ISSN 2053-1591 https://iopscience.iop.org/article/10.1088/2053-1591/abd1e6 10.1088/2053-1591/abd1e6
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
description A homogeneous CuO-ZnO nanostructure with tunable morphology and optical band structure is successfully synthesized via a hydrothermal method under the different dopant mole ratios of Cu. The robust correlation between the crystallite size, surface morphology, optical band gap alteration of the synthesized CuO-ZnO and its performance in photoelectrochemical (PEC) activity are investigated and compared to the reference ZnO based photocathode. In this report, it is found that the morphology of hexagonal ZnO nanorod is changed to nanosheet and vertically align CuO-ZnO based nanograss after the Cu incorporation. This result is mainly due to the composition phase change after the excessive incorporation of Cu metal into ZnO lattice. Furthermore, the optical band gap of the sample also presented a bathochromic shifted after the Cu insertion. The measurements on PEC activity of CuO-ZnO nanostructure was performed under the irradiation of a 100 mWcm−2 Xenon light in 0.5M Na2SO4 electrolyte. Among the sample, 0 Zn:1 Cu exhibited a highest photocurrent density which is 5 fold as compared to its reference ZnO samples. This finding could be due to the highest surface active area and lowest optical energy band gap in the 0 Zn:1 Cu nanograss that eventually contributes to a high free electron density that facilitates the charge transport in the photoelectrochemical cells. This novel approach could provide an alternative to the future solar hydrogenation application.
format Article
author A Albadarin, Nusayba
Takrif, Mohd Sobri
Tan, Sin Tee
Shahahmadi, Seyed Ahmad
Jeffery Minggu, Lorna
Kadhum, Abdul Amir Hassan
Yin, Wong Wai
Salehmin, Mohd Nur Ikhmal
M Alkhalqi, Ensaf
Abdul Hamid, Muhammad Azmi
Amin, Nowshad
spellingShingle A Albadarin, Nusayba
Takrif, Mohd Sobri
Tan, Sin Tee
Shahahmadi, Seyed Ahmad
Jeffery Minggu, Lorna
Kadhum, Abdul Amir Hassan
Yin, Wong Wai
Salehmin, Mohd Nur Ikhmal
M Alkhalqi, Ensaf
Abdul Hamid, Muhammad Azmi
Amin, Nowshad
Tunable morphology and band gap alteration of CuO-ZnO nanostructures based photocathode for solar photoelectrochemical cells
author_facet A Albadarin, Nusayba
Takrif, Mohd Sobri
Tan, Sin Tee
Shahahmadi, Seyed Ahmad
Jeffery Minggu, Lorna
Kadhum, Abdul Amir Hassan
Yin, Wong Wai
Salehmin, Mohd Nur Ikhmal
M Alkhalqi, Ensaf
Abdul Hamid, Muhammad Azmi
Amin, Nowshad
author_sort A Albadarin, Nusayba
title Tunable morphology and band gap alteration of CuO-ZnO nanostructures based photocathode for solar photoelectrochemical cells
title_short Tunable morphology and band gap alteration of CuO-ZnO nanostructures based photocathode for solar photoelectrochemical cells
title_full Tunable morphology and band gap alteration of CuO-ZnO nanostructures based photocathode for solar photoelectrochemical cells
title_fullStr Tunable morphology and band gap alteration of CuO-ZnO nanostructures based photocathode for solar photoelectrochemical cells
title_full_unstemmed Tunable morphology and band gap alteration of CuO-ZnO nanostructures based photocathode for solar photoelectrochemical cells
title_sort tunable morphology and band gap alteration of cuo-zno nanostructures based photocathode for solar photoelectrochemical cells
publisher Institute of Physics Publishing
publishDate 2020
url http://psasir.upm.edu.my/id/eprint/86405/
https://iopscience.iop.org/article/10.1088/2053-1591/abd1e6
_version_ 1748704625267048448
score 13.211869

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