Heterojunction Fe2O3-SnO2 nanostructured photoanode for efficient photoelectrochemical water splitting

Hyun Soo Han; Sun Shin; Jun Hong Noh; In Sun Cho; Kug Sun Hong

doi:10.1007/s11837-014-0915-1

Heterojunction Fe₂O₃-SnO₂ nanostructured photoanode for efficient photoelectrochemical water splitting

Hyun Soo Han, Sun Shin, Jun Hong Noh, In Sun Cho, Kug Sun Hong

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

14 Citations (Scopus)

Abstract

Hierarchically organized nanostructures were fabricated by growing SnO ₂ nanoparticles on a fluorine-doped tin oxide/glass substrate via a laser ablation method. Cauliflower-like clusters consisting of agglomerated nanoparticles were deposited and aligned with respect to the substrate with a large internal surface area and open channels of pores. The morphological changes of SnO₂ nanostructured films were investigated as a function of the oxygen working pressure in the range of 100-500 mTorr. A nanostructured scaffold prepared at an oxygen working pressure of 100 mTorr exhibited the best photoelectrochemical (PEC) performance. A Ti:Fe₂O₃- SnO₂ nanostructured photoanode showed the photocurrent that was 34% larger than that of a Ti:Fe₂O₃ flat photoanode when the amount of Ti:Fe₂O₃ sensitizer was identical for the two photoanodes. The larger surface area and longer electron lifetime of the Ti:Fe₂O₃-SnO₂ nanostructured photoanode explains its improved PEC performance.

Original language	English
Pages (from-to)	664-669
Number of pages	6
Journal	JOM
Volume	66
Issue number	4
DOIs	https://doi.org/10.1007/s11837-014-0915-1
Publication status	Published - 2014 Apr
Externally published	Yes

ASJC Scopus subject areas

Materials Science(all)
Engineering(all)

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1007/s11837-014-0915-1

Cite this

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title = "Heterojunction Fe2O3-SnO2 nanostructured photoanode for efficient photoelectrochemical water splitting",

abstract = "Hierarchically organized nanostructures were fabricated by growing SnO 2 nanoparticles on a fluorine-doped tin oxide/glass substrate via a laser ablation method. Cauliflower-like clusters consisting of agglomerated nanoparticles were deposited and aligned with respect to the substrate with a large internal surface area and open channels of pores. The morphological changes of SnO2 nanostructured films were investigated as a function of the oxygen working pressure in the range of 100-500 mTorr. A nanostructured scaffold prepared at an oxygen working pressure of 100 mTorr exhibited the best photoelectrochemical (PEC) performance. A Ti:Fe2O3- SnO2 nanostructured photoanode showed the photocurrent that was 34% larger than that of a Ti:Fe2O3 flat photoanode when the amount of Ti:Fe2O3 sensitizer was identical for the two photoanodes. The larger surface area and longer electron lifetime of the Ti:Fe2O3-SnO2 nanostructured photoanode explains its improved PEC performance.",

author = "Han, {Hyun Soo} and Sun Shin and Noh, {Jun Hong} and Cho, {In Sun} and Hong, {Kug Sun}",

note = "Funding Information: This work was supported by a Grant from the National Research Foundation of Korea (NRF) funded by the Korean government (MEST) (2012-0008669) and by the Global Frontier R&D Program of the Center for Multiscale Energy Systems funded by the National Research Foundation under the Ministry of Education, Science and Technology of Korea (2011-0031574).",

year = "2014",

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doi = "10.1007/s11837-014-0915-1",

language = "English",

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AU - Han, Hyun Soo

AU - Shin, Sun

AU - Noh, Jun Hong

AU - Cho, In Sun

AU - Hong, Kug Sun

N1 - Funding Information: This work was supported by a Grant from the National Research Foundation of Korea (NRF) funded by the Korean government (MEST) (2012-0008669) and by the Global Frontier R&D Program of the Center for Multiscale Energy Systems funded by the National Research Foundation under the Ministry of Education, Science and Technology of Korea (2011-0031574).

PY - 2014/4

Y1 - 2014/4

N2 - Hierarchically organized nanostructures were fabricated by growing SnO 2 nanoparticles on a fluorine-doped tin oxide/glass substrate via a laser ablation method. Cauliflower-like clusters consisting of agglomerated nanoparticles were deposited and aligned with respect to the substrate with a large internal surface area and open channels of pores. The morphological changes of SnO2 nanostructured films were investigated as a function of the oxygen working pressure in the range of 100-500 mTorr. A nanostructured scaffold prepared at an oxygen working pressure of 100 mTorr exhibited the best photoelectrochemical (PEC) performance. A Ti:Fe2O3- SnO2 nanostructured photoanode showed the photocurrent that was 34% larger than that of a Ti:Fe2O3 flat photoanode when the amount of Ti:Fe2O3 sensitizer was identical for the two photoanodes. The larger surface area and longer electron lifetime of the Ti:Fe2O3-SnO2 nanostructured photoanode explains its improved PEC performance.

AB - Hierarchically organized nanostructures were fabricated by growing SnO 2 nanoparticles on a fluorine-doped tin oxide/glass substrate via a laser ablation method. Cauliflower-like clusters consisting of agglomerated nanoparticles were deposited and aligned with respect to the substrate with a large internal surface area and open channels of pores. The morphological changes of SnO2 nanostructured films were investigated as a function of the oxygen working pressure in the range of 100-500 mTorr. A nanostructured scaffold prepared at an oxygen working pressure of 100 mTorr exhibited the best photoelectrochemical (PEC) performance. A Ti:Fe2O3- SnO2 nanostructured photoanode showed the photocurrent that was 34% larger than that of a Ti:Fe2O3 flat photoanode when the amount of Ti:Fe2O3 sensitizer was identical for the two photoanodes. The larger surface area and longer electron lifetime of the Ti:Fe2O3-SnO2 nanostructured photoanode explains its improved PEC performance.

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