Photocatalytic performance of V₂O₅ nanoparticles incorporated TiO₂ nanotubes as a visible-light active photoelectrodefor water splitting

Authors

Ulugbek Shaislamov, National University of UzbekistanFollow
Kamil Mukimov, National University of Uzbekistan; Center for Development of Nanotechnology, Tashkent
Turgunali Akhmadjanov, National University of Uzbekistan

Abstract

Herein we demonstrate brief investigation results of photoelectrochemical performance of TiO₂ nanotube (NT) based photoelectrode incorporated with V₂O₅ nanopaerticles (NP). Photoelectrodes were composed of TiO₂ NTs with a diameter of 100 nm and length of 8µm,that were prepared by electrochemical anodization process at 35V in a formamade based electrolyte. The V₂O₅ nanoparticles were formed on the walls of the TiO₂ NTs by deep coating technique with an average size of ∼5-10 nm. The V₂O₅NP incorporated TiO₂NTs show superior light absorption properties in the visible light region up to ∼600 nm compared to the pristine TiO₂NTs. It was found that V₂O₅ NPs formed vanadium impurities within TiO₂ NTs which in its turn ceated acceptor levels of V³⁺ ions in the TiO₂ NTs located deep in the forbidden band gap and provided additional absorption properties of visible light. These impurity levels also provide fast recombination sites of electrons and holes formed by photon excitation.

First Page

121

Last Page

132

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Recommended Citation

Shaislamov, Ulugbek; Mukimov, Kamil; and Akhmadjanov, Turgunali (2020) "Photocatalytic performance of V₂O₅ nanoparticles incorporated TiO₂ nanotubes as a visible-light active photoelectrodefor water splitting," Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences: Vol. 3: Iss. 1, Article 11.
DOI: https://doi.org/10.56017/2181-1318.1059