Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Influence of the Morphology of TiO2/ Au NP Nanocomposite on ITO/Glass Substrate on Their Photoelectrochemical Properties

Anton S. Voronin
* ORCID logo ,
Ivan V. Nemtsev
ORCID logo ,
Ksenia A. Shabanova
,
Мikhail M. Simunin
ORCID logo ,
Nikolai D. Sidorenko
,
Dina V. Markovskaya
,
Ekaterina A. Kozlova
ORCID logo ,
Gavriil A. Romanenko
,
Stanislav V. Khartov
Version 1 : Received: 23 December 2023 / Approved: 25 December 2023 / Online: 25 December 2023 (11:26:09 CET)

How to cite: Voronin, A.S.; Nemtsev, I.V.; Shabanova, K.A.; Simunin, М.M.; Sidorenko, N.D.; Markovskaya, D.V.; Kozlova, E.A.; Romanenko, G.A.; Khartov, S.V. Influence of the Morphology of TiO2/ Au NP Nanocomposite on ITO/Glass Substrate on Their Photoelectrochemical Properties. Preprints 2023, 2023121773. https://doi.org/10.20944/preprints202312.1773.v1 Voronin, A.S.; Nemtsev, I.V.; Shabanova, K.A.; Simunin, М.M.; Sidorenko, N.D.; Markovskaya, D.V.; Kozlova, E.A.; Romanenko, G.A.; Khartov, S.V. Influence of the Morphology of TiO2/ Au NP Nanocomposite on ITO/Glass Substrate on Their Photoelectrochemical Properties. Preprints 2023, 2023121773. https://doi.org/10.20944/preprints202312.1773.v1

Abstract

In this work, nanocomposite photoelectrodes of the TiO2/ Au composition were manufactured, in which the size of plasmonic Au nanoparticles was varied, and the morphology of the TiO2 layer, depending on the thickness, changed from an island to a continuous layer. The influence of the morphology of plasmonic Au nanoparticles and the TiO2 layer on the optical and photoelectrochemical characteristics of hybrid photoelectrodes was studied. It has been shown that continuous coating of Au nanoparticles with a TiO2 layer (layer thickness 10 and 15 nm) leads to a decrease in the photoelectric response, and the decrease in photocurrent density and photoconversion efficiency decreases in proportion to the thickness of the TiO2 layer. The indicated drop in characteristics when plasmonic particles are located under the TiO2 layer is presumably associated with the scattering and recombination of charge carriers in the semiconductor layer. The best performance was shown by a system in which large Au nanoparticles (10 nm) are coated with a 5 nm thick layer of titanium dioxide; in this geometry, Au nanoparticles are decorated with TiO2 nanoparticles, as a result of which the photoelectrode-electrolyte interface has a more complex structure.

Keywords

Photoelectrochemistry; surface plasmon resonance; atomic layer deposition; magnetron sputtering; titanium oxide; Au nanoparticles; thin film; photoelectrode

Subject

Chemistry and Materials Science, Nanotechnology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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