Effect of thickness in hematite films produced by spray pyrolysis towards water photo-oxidation in neutral media

T. Mariño-Otero; M. A. Oliver-Tolentino; M. A. Aguilar-Frutis; G. Contreras-Martínez; E. Pérez-Cappe; E. Reguera

doi:10.1016/j.ijhydene.2015.03.017

Effect of thickness in hematite films produced by spray pyrolysis towards water photo-oxidation in neutral media

T. Mariño-Otero, M. A. Oliver-Tolentino, M. A. Aguilar-Frutis, G. Contreras-Martínez, E. Pérez-Cappe, E. Reguera

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

Transition metal oxide semiconductors are attractive materials for hydrogen production by photo-induced water splitting. In this contribution, hematite (α-Fe₂O₃) films of different thickness grown over FTO conductive substrate, through spray pyrolysis method, were evaluated for water splitting under UV-vis irradiation using a Xe lamp. The films were characterized from X-ray diffraction, IR and UV-vis spectroscopic data. Their band gap (Eg), estimated from the recorded UV-vis spectra, and the photocurrent density (j), derived from the electrochemical data for water splitting, shown an inverse dependence on the film thickness. Such behavior is discussed according to the electron/hole mobility in the film.

Original language	English
Pages (from-to)	5831-5836
Number of pages	6
Journal	International Journal of Hydrogen Energy
Volume	40
Issue number	17
DOIs	https://doi.org/10.1016/j.ijhydene.2015.03.017
State	Published - 11 May 2015
Externally published	Yes

Keywords

Hematite film for water splitting
Hematite thin film
Hematite thin film prepared by spray pyrolysis
Photoinduced water splitting
Water splitting using hematite films

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10.1016/j.ijhydene.2015.03.017

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title = "Effect of thickness in hematite films produced by spray pyrolysis towards water photo-oxidation in neutral media",

abstract = "Transition metal oxide semiconductors are attractive materials for hydrogen production by photo-induced water splitting. In this contribution, hematite (α-Fe2O3) films of different thickness grown over FTO conductive substrate, through spray pyrolysis method, were evaluated for water splitting under UV-vis irradiation using a Xe lamp. The films were characterized from X-ray diffraction, IR and UV-vis spectroscopic data. Their band gap (Eg), estimated from the recorded UV-vis spectra, and the photocurrent density (j), derived from the electrochemical data for water splitting, shown an inverse dependence on the film thickness. Such behavior is discussed according to the electron/hole mobility in the film.",

keywords = "Hematite film for water splitting, Hematite thin film, Hematite thin film prepared by spray pyrolysis, Photoinduced water splitting, Water splitting using hematite films",

author = "T. Mari{\~n}o-Otero and Oliver-Tolentino, {M. A.} and Aguilar-Frutis, {M. A.} and G. Contreras-Mart{\'i}nez and E. P{\'e}rez-Cappe and E. Reguera",

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year = "2015",

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doi = "10.1016/j.ijhydene.2015.03.017",

language = "Ingl{\'e}s",

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T1 - Effect of thickness in hematite films produced by spray pyrolysis towards water photo-oxidation in neutral media

AU - Mariño-Otero, T.

AU - Oliver-Tolentino, M. A.

AU - Aguilar-Frutis, M. A.

AU - Contreras-Martínez, G.

AU - Pérez-Cappe, E.

AU - Reguera, E.

PY - 2015/5/11

Y1 - 2015/5/11

N2 - Transition metal oxide semiconductors are attractive materials for hydrogen production by photo-induced water splitting. In this contribution, hematite (α-Fe2O3) films of different thickness grown over FTO conductive substrate, through spray pyrolysis method, were evaluated for water splitting under UV-vis irradiation using a Xe lamp. The films were characterized from X-ray diffraction, IR and UV-vis spectroscopic data. Their band gap (Eg), estimated from the recorded UV-vis spectra, and the photocurrent density (j), derived from the electrochemical data for water splitting, shown an inverse dependence on the film thickness. Such behavior is discussed according to the electron/hole mobility in the film.

AB - Transition metal oxide semiconductors are attractive materials for hydrogen production by photo-induced water splitting. In this contribution, hematite (α-Fe2O3) films of different thickness grown over FTO conductive substrate, through spray pyrolysis method, were evaluated for water splitting under UV-vis irradiation using a Xe lamp. The films were characterized from X-ray diffraction, IR and UV-vis spectroscopic data. Their band gap (Eg), estimated from the recorded UV-vis spectra, and the photocurrent density (j), derived from the electrochemical data for water splitting, shown an inverse dependence on the film thickness. Such behavior is discussed according to the electron/hole mobility in the film.

KW - Hematite film for water splitting

KW - Hematite thin film

KW - Hematite thin film prepared by spray pyrolysis

KW - Photoinduced water splitting

KW - Water splitting using hematite films

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U2 - 10.1016/j.ijhydene.2015.03.017

DO - 10.1016/j.ijhydene.2015.03.017

M3 - Artículo

SN - 0360-3199

VL - 40

SP - 5831

EP - 5836

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 17

ER -

Effect of thickness in hematite films produced by spray pyrolysis towards water photo-oxidation in neutral media

Abstract

Keywords

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