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Aqueous synthesis of Z-scheme photocatalyst powders and thin-film photoanodes from earth abundant elements

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Aqueous synthesis of Z-scheme photocatalyst powders and thin-film photoanodes from earth abundant elements. / Šutka, A.; Vanags, M.; Joost, U.; Šmits, K.; Ruža, J.; Ločs, J.; Kleperis, J.; Juhna, T.

In: Journal of Environmental Chemical Engineering, Vol. 6, No. 2, 01.04.2018, p. 2606-2615.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Šutka, A, Vanags, M, Joost, U, Šmits, K, Ruža, J, Ločs, J, Kleperis, J & Juhna, T 2018, 'Aqueous synthesis of Z-scheme photocatalyst powders and thin-film photoanodes from earth abundant elements', Journal of Environmental Chemical Engineering, vol. 6, no. 2, pp. 2606-2615. https://doi.org/10.1016/j.jece.2018.04.003

APA

Šutka, A., Vanags, M., Joost, U., Šmits, K., Ruža, J., Ločs, J., ... Juhna, T. (2018). Aqueous synthesis of Z-scheme photocatalyst powders and thin-film photoanodes from earth abundant elements. Journal of Environmental Chemical Engineering, 6(2), 2606-2615. https://doi.org/10.1016/j.jece.2018.04.003

Vancouver

Šutka A, Vanags M, Joost U, Šmits K, Ruža J, Ločs J et al. Aqueous synthesis of Z-scheme photocatalyst powders and thin-film photoanodes from earth abundant elements. Journal of Environmental Chemical Engineering. 2018 Apr 1;6(2):2606-2615. https://doi.org/10.1016/j.jece.2018.04.003

Author

Šutka, A. ; Vanags, M. ; Joost, U. ; Šmits, K. ; Ruža, J. ; Ločs, J. ; Kleperis, J. ; Juhna, T. / Aqueous synthesis of Z-scheme photocatalyst powders and thin-film photoanodes from earth abundant elements. In: Journal of Environmental Chemical Engineering. 2018 ; Vol. 6, No. 2. pp. 2606-2615.

Bibtex - Download

@article{ef10ab4dde714a009c1b7696aef840db,
title = "Aqueous synthesis of Z-scheme photocatalyst powders and thin-film photoanodes from earth abundant elements",
abstract = "Solid-state narrow band gap semiconductor heterostructures with a Z-scheme charge-transfer mechanism are the most promising photocatalytic systems for water splitting and environmental remediation under visible light. Herein, we construct all-solid Z-scheme photocatalytic systems from earth abundant elements (Ca and Fe) using an aqueous synthesis procedure. A novel Z-scheme two-component Fe2O3/Ca2Fe2O5 heterostructure is obtained in a straightforward manner by soaking various iron-containing nanoparticles (amorphous and crystalline) with Ca(NO3)2 and performing short (20min) thermal treatments at 820°C. The obtained powder materials show high photocatalytic performances for methylene blue dye degradation under visible light (45 mW/cm2), exhibiting a rate constant up to 0.015min-1. The heterostructure exhibits a five-fold higher activity compared to that of pristine hematite. The experiments show that amorphous iron-containing substrate nanoparticles trigger the Fe2O3/Ca2Fe2O5 heterostructure formation. We extended our study to produce Fe2O3/Ca2Fe2O5 nanoheterostructure photoanodes via the electrochemical deposition of amorphous iron-containing sediment were used. The visible-light (15mW/cm2) photocurrent increases from 183μA/cm2 to 306μA/cm2 after coupling hematite and Ca2Fe2O5. Notably, the powders and photoanodes exhibit distinct charge-transfer mechanisms evidenced by the different stabilities of the heterostructures under different working conditions.",
keywords = "Hematite, Photoanode, Photocatalyst, Photoelectrochemical properties, Z-scheme",
author = "A. Šutka and M. Vanags and U. Joost and K. Šmits and J. Ruža and J. Ločs and J. Kleperis and T. Juhna",
note = "INT=fot, ”Joost, U.”",
year = "2018",
month = "4",
day = "1",
doi = "10.1016/j.jece.2018.04.003",
language = "English",
volume = "6",
pages = "2606--2615",
journal = "Journal of Environmental Chemical Engineering",
issn = "2213-3437",
publisher = "Elsevier",
number = "2",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Aqueous synthesis of Z-scheme photocatalyst powders and thin-film photoanodes from earth abundant elements

AU - Šutka, A.

AU - Vanags, M.

AU - Joost, U.

AU - Šmits, K.

AU - Ruža, J.

AU - Ločs, J.

AU - Kleperis, J.

AU - Juhna, T.

N1 - INT=fot, ”Joost, U.”

PY - 2018/4/1

Y1 - 2018/4/1

N2 - Solid-state narrow band gap semiconductor heterostructures with a Z-scheme charge-transfer mechanism are the most promising photocatalytic systems for water splitting and environmental remediation under visible light. Herein, we construct all-solid Z-scheme photocatalytic systems from earth abundant elements (Ca and Fe) using an aqueous synthesis procedure. A novel Z-scheme two-component Fe2O3/Ca2Fe2O5 heterostructure is obtained in a straightforward manner by soaking various iron-containing nanoparticles (amorphous and crystalline) with Ca(NO3)2 and performing short (20min) thermal treatments at 820°C. The obtained powder materials show high photocatalytic performances for methylene blue dye degradation under visible light (45 mW/cm2), exhibiting a rate constant up to 0.015min-1. The heterostructure exhibits a five-fold higher activity compared to that of pristine hematite. The experiments show that amorphous iron-containing substrate nanoparticles trigger the Fe2O3/Ca2Fe2O5 heterostructure formation. We extended our study to produce Fe2O3/Ca2Fe2O5 nanoheterostructure photoanodes via the electrochemical deposition of amorphous iron-containing sediment were used. The visible-light (15mW/cm2) photocurrent increases from 183μA/cm2 to 306μA/cm2 after coupling hematite and Ca2Fe2O5. Notably, the powders and photoanodes exhibit distinct charge-transfer mechanisms evidenced by the different stabilities of the heterostructures under different working conditions.

AB - Solid-state narrow band gap semiconductor heterostructures with a Z-scheme charge-transfer mechanism are the most promising photocatalytic systems for water splitting and environmental remediation under visible light. Herein, we construct all-solid Z-scheme photocatalytic systems from earth abundant elements (Ca and Fe) using an aqueous synthesis procedure. A novel Z-scheme two-component Fe2O3/Ca2Fe2O5 heterostructure is obtained in a straightforward manner by soaking various iron-containing nanoparticles (amorphous and crystalline) with Ca(NO3)2 and performing short (20min) thermal treatments at 820°C. The obtained powder materials show high photocatalytic performances for methylene blue dye degradation under visible light (45 mW/cm2), exhibiting a rate constant up to 0.015min-1. The heterostructure exhibits a five-fold higher activity compared to that of pristine hematite. The experiments show that amorphous iron-containing substrate nanoparticles trigger the Fe2O3/Ca2Fe2O5 heterostructure formation. We extended our study to produce Fe2O3/Ca2Fe2O5 nanoheterostructure photoanodes via the electrochemical deposition of amorphous iron-containing sediment were used. The visible-light (15mW/cm2) photocurrent increases from 183μA/cm2 to 306μA/cm2 after coupling hematite and Ca2Fe2O5. Notably, the powders and photoanodes exhibit distinct charge-transfer mechanisms evidenced by the different stabilities of the heterostructures under different working conditions.

KW - Hematite

KW - Photoanode

KW - Photocatalyst

KW - Photoelectrochemical properties

KW - Z-scheme

U2 - 10.1016/j.jece.2018.04.003

DO - 10.1016/j.jece.2018.04.003

M3 - Article

VL - 6

SP - 2606

EP - 2615

JO - Journal of Environmental Chemical Engineering

JF - Journal of Environmental Chemical Engineering

SN - 2213-3437

IS - 2

ER -