by Francisco Javier Fernández-Alonso, Paula Quiterio, Rui Vilarinho, João P. Araújo, Adélio Mendes, Miguel Manso-Silván, Vicente Torres-Costa, Arlete Apolinario and Célia Tavares de Sousa
Abstract:
Photoelectrochemical water splitting is a promising alternative for sustainable energy production, addressing the growing need for clean energy sources. Hematite is a potential semiconductor for this process due to its abundance, low cost, non-toxicity, and stability. However, bare-hematite-based photoelectrochemical cells face challenges such as low photocurrent density, requiring innovative strategies to improve efficiency. This study explores the combined effects of three key approaches: enhancing crystallinity through high-temperature annealing, increasing specific surface area via nanostructuring, and improving photoanode conductivity through heteroatom doping. Hematite nanowires were synthesized using a hydrothermal method, with Ti-doping introduced during hydrothermal synthesis and subsequent Sn co-doping during an 800 °C annealing process, which also improved crystallinity. The introduction of Ti dopant significantly increased the photocurrent density under simulated solar illumination from 0.03 mA·cm-2 to 0.63 mA·cm-2. Co-doping with Ti and Sn further enhanced performance to 1.27 mA·cm-2. The research explores how heteroatom doping influences the properties of hematite and examines its interaction with high-temperature annealing. These findings are significant for advancing the design of efficient nanostructures for energy conversion applications.
Reference:
Francisco Javier Fernández-Alonso, Paula Quiterio, Rui Vilarinho, João P. Araújo, Adélio Mendes, Miguel Manso-Silván, Vicente Torres-Costa, Arlete Apolinario and Célia Tavares de Sousa, “Exploring the interplay of Ti-Sn co-doping in photoelectrochemical water splitting of hematite nanowires”, Energy Materials, vol. 5, no. 10, pp. N/A–N/A.
Bibtex Entry:
@article{fernandez-alonso_exploring_2025,
title = {Exploring the interplay of {Ti}-{Sn} co-doping in photoelectrochemical water splitting of hematite nanowires},
volume = {5},
issn = {ISSN 2770-5900 (Online)},
url = {https://www.oaepublish.com/articles/energymater.2024.108},
doi = {10.20517/energymater.2024.108},
abstract = {Photoelectrochemical water splitting is a promising alternative for sustainable energy production, addressing the growing need for clean energy sources. Hematite is a potential semiconductor for this process due to its abundance, low cost, non-toxicity, and stability. However, bare-hematite-based photoelectrochemical cells face challenges such as low photocurrent density, requiring innovative strategies to improve efficiency. This study explores the combined effects of three key approaches: enhancing crystallinity through high-temperature annealing, increasing specific surface area via nanostructuring, and improving photoanode conductivity through heteroatom doping. Hematite nanowires were synthesized using a hydrothermal method, with Ti-doping introduced during hydrothermal synthesis and subsequent Sn co-doping during an 800 °C annealing process, which also improved crystallinity. The introduction of Ti dopant significantly increased the photocurrent density under simulated solar illumination from 0.03 mA·cm-2 to 0.63 mA·cm-2. Co-doping with Ti and Sn further enhanced performance to 1.27 mA·cm-2. The research explores how heteroatom doping influences the properties of hematite and examines its interaction with high-temperature annealing. These findings are significant for advancing the design of efficient nanostructures for energy conversion applications.},
language = {en},
number = {10},
urldate = {2025-08-01},
journal = {Energy Materials},
author = {Fernández-Alonso, Francisco Javier and Quiterio, Paula and Vilarinho, Rui and Araújo, João P. and Mendes, Adélio and Manso-Silván, Miguel and Torres-Costa, Vicente and Apolinario, Arlete and Sousa, Célia Tavares de},
month = jul,
year = {2025},
pages = {N/A--N/A},
file = {Full Text PDF:E:\Usuarios\Administrator\Zotero\storage\7X6FDP92\Fernández-Alonso et al. - 2025 - Exploring the interplay of Ti-Sn co-doping in photoelectrochemical water splitting of hematite nanow.pdf:application/pdf},
}