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

Copper; Copper oxides; Crystallite size; Electrochemical cells; Electrolytes; Electrons; Energy gap; II-VI semiconductors; Morphology; Nanorods; Optical band gaps; Optical correlation; Oxide minerals; Photocathodes; Photocurrents; Photoelectrochemical cells; Sodium sulfate; Surface morphology; Zinc...

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Main Authors: Albadarin N.A., Takriff M.S., Tan S.T., Shahahmadi S.A., Minggu L.J., Kadhum A.A.H., Yin W.W., Salehmin M.N.I., Alkhalqi E.M., Hamid M.A.A., Amin N.
Other Authors: 57221288294
Format: Article
Published: IOP Publishing Ltd 2023
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spelling my.uniten.dspace-251122023-05-29T16:06:50Z Tunable morphology and band gap alteration of CuO-ZnO nanostructures based photocathode for solar photoelectrochemical cells Albadarin N.A. Takriff M.S. Tan S.T. Shahahmadi S.A. Minggu L.J. Kadhum A.A.H. Yin W.W. Salehmin M.N.I. Alkhalqi E.M. Hamid M.A.A. Amin N. 57221288294 7801559144 57209466790 55567116600 35772813400 35546574700 57196039580 55628787200 57221286458 55417659700 7102424614 Copper; Copper oxides; Crystallite size; Electrochemical cells; Electrolytes; Electrons; Energy gap; II-VI semiconductors; Morphology; Nanorods; Optical band gaps; Optical correlation; Oxide minerals; Photocathodes; Photocurrents; Photoelectrochemical cells; Sodium sulfate; Surface morphology; Zinc oxide; Free-electron density; Hydrothermal methods; Optical band structure; Optical energy band gap; Photocurrent density; Photoelectrochemicals; Tunable morphologies; ZnO nanostructures; Sulfur compounds 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. � 2020 The Author(s). Published by IOP Publishing Ltd Final 2023-05-29T08:06:50Z 2023-05-29T08:06:50Z 2020 Article 10.1088/2053-1591/abd1e6 2-s2.0-85098728538 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85098728538&doi=10.1088%2f2053-1591%2fabd1e6&partnerID=40&md5=5c9bad6d776e31a980829d7cfeebbc42 https://irepository.uniten.edu.my/handle/123456789/25112 7 12 125010 All Open Access, Gold IOP Publishing Ltd Scopus
institution Universiti Tenaga Nasional
building UNITEN Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tenaga Nasional
content_source UNITEN Institutional Repository
url_provider http://dspace.uniten.edu.my/
description Copper; Copper oxides; Crystallite size; Electrochemical cells; Electrolytes; Electrons; Energy gap; II-VI semiconductors; Morphology; Nanorods; Optical band gaps; Optical correlation; Oxide minerals; Photocathodes; Photocurrents; Photoelectrochemical cells; Sodium sulfate; Surface morphology; Zinc oxide; Free-electron density; Hydrothermal methods; Optical band structure; Optical energy band gap; Photocurrent density; Photoelectrochemicals; Tunable morphologies; ZnO nanostructures; Sulfur compounds
author2 57221288294
author_facet 57221288294
Albadarin N.A.
Takriff M.S.
Tan S.T.
Shahahmadi S.A.
Minggu L.J.
Kadhum A.A.H.
Yin W.W.
Salehmin M.N.I.
Alkhalqi E.M.
Hamid M.A.A.
Amin N.
format Article
author Albadarin N.A.
Takriff M.S.
Tan S.T.
Shahahmadi S.A.
Minggu L.J.
Kadhum A.A.H.
Yin W.W.
Salehmin M.N.I.
Alkhalqi E.M.
Hamid M.A.A.
Amin N.
spellingShingle Albadarin N.A.
Takriff M.S.
Tan S.T.
Shahahmadi S.A.
Minggu L.J.
Kadhum A.A.H.
Yin W.W.
Salehmin M.N.I.
Alkhalqi E.M.
Hamid M.A.A.
Amin N.
Tunable morphology and band gap alteration of CuO-ZnO nanostructures based photocathode for solar photoelectrochemical cells
author_sort Albadarin N.A.
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 IOP Publishing Ltd
publishDate 2023
_version_ 1806424557634977792
score 13.214268

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