Flame doping of indium ions into TiO2 nanorod arrays for enhanced photochemical water oxidation

Xue Chen; Biyi Chen; Dan Li; Longhua Li; Dongbo Xu; Weidong Shi

doi:10.1039/D3DT02120C

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Flame doping of indium ions into TiO₂ nanorod arrays for enhanced photochemical water oxidation†

Xue Chen,^a Biyi Chen,^a Dan Li,^a Longhua Li,

^a Dongbo Xu*^a and Weidong Shi

*^a

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* Corresponding authors

^a School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang city 212013, P. R. China
E-mail: xudb39@ujs.edu.cn, swd1978@ujs.edu.cn

Abstract

Indium (In) ions were diffused into a TiO₂ (In-TiO₂) photoelectrode via a facile and efficient flame doping method resulting in improved photo-induced carrier separation. The dopant concentration was systematically investigated, and a volcano-type relationship between the dopant concentration and photoelectrochemical (PEC) performance was observed. The optimum incident photon-to-current efficiency and photocurrent density of In-TiO₂ were 38.6% and 0.70 mA cm⁻² at 1.23 V, respectively, 2.1 and 11.2 times the values of pristine TiO₂, respectively. In doping resulted in improved charge separation and lower surface adsorption energies for reactant molecules, as evidenced by experimental and computational methods.

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Article information

DOI: https://doi.org/10.1039/D3DT02120C
Article type: Communication
Submitted: 06 Jul 2023
Accepted: 11 Sep 2023
First published: 18 Sep 2023

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Dalton Trans., 2023,52, 14747-14751

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Flame doping of indium ions into TiO₂ nanorod arrays for enhanced photochemical water oxidation

X. Chen, B. Chen, D. Li, L. Li, D. Xu and W. Shi, Dalton Trans., 2023, 52, 14747 DOI: 10.1039/D3DT02120C

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