Diversity of TiO2: Controlling the molecular and electronic structure of atomic layer deposited black TiO2

Harri Ali-Löytty; Markku Hannula; Jesse Saari; Lauri Palmolahti; Bela D. Bhuskute; Riina Ulkuniemi; Tuomo Nyyssönen; Kimmo Lahtonen; Mika Valden

doi:10.1021/acsami.8b20608

Diversity of TiO2: Controlling the molecular and electronic structure of atomic layer deposited black TiO2

Harri Ali-Löytty
, Markku Hannula
, Jesse Saari
, Lauri Palmolahti
, Bela D. Bhuskute
, Riina Ulkuniemi
, Tuomo Nyyssönen
, Kimmo Lahtonen
, Mika Valden

Tutkimustuotos: Artikkeli › Tieteellinen › vertaisarvioitu

61 Sitaatiot (Scopus)

150 Lataukset (Pure)

Abstrakti

Visually black, electrically leaky, amorphous titania (am-TiO2) thin films were grown by atomic layer deposition (ALD) for photocatalytic applications. Broad spectral absorbance in the visible range and exceptional conductivity are attributed to trapped Ti3+ in the film. Oxidation of Ti3+ upon heat treatment leads to a drop in conductivity, a color change from black to white, and crystallization of am-TiO2. ALD-grown black TiO2, without any heat treatment, is subject to dissolution in alkaline photoelectrochemical conditions. The best photocatalytic activity for solar water splitting is obtained for completely crystalline white TiO2.

Alkuperäiskieli	Englanti
Sivut	2758–2762
Sivumäärä	5
Julkaisu	ACS Applied Materials and Interfaces
Vuosikerta	11
Numero	3
DOI - pysyväislinkit	https://doi.org/10.1021/acsami.8b20608
Tila	Julkaistu - 4 tammik. 2019
OKM-julkaisutyyppi	A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Rahoitus

This work was supported by the Academy of Finland (decision numbers 141481, 286713 and 309920). H.A. and B.D.B. were supported by the Jenny and Antti Wihuri Foundation. M.H. was supported by the TUT’s Graduate School and Emil Aaltonen Foundation.

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10.1021/acsami.8b20608Lisenssi: CC BY

acsami.8b20608
With CC-BY license https://creativecommons.org/licenses/by/4.0/
Final published version, 3,39 MB

http://urn.fi/URN:NBN:fi:tty-201906281916Lisenssi: CC BY

Fotoniikan materiaalit
Tukiainen, A. (Yhteyshenkilö) & Lahtonen, K. (Yhteyshenkilö)
Fysiikka
Laitteistot/tilat: Tutkimusinfrastruktuuri
Materiaalikarakterisointi (fysiikka)
Lahtonen, K. (Yhteyshenkilö) & Tukiainen, A. (Yhteyshenkilö)
Fysiikka
Laitteistot/tilat: Tutkimusinfrastruktuuri
Tampereen Mikroskopiakeskus
Vippola, M. (Manager), Honkanen, M. (Operator) & Salminen, T. (Operator)
Tekniikan ja luonnontieteiden tiedekunta
Laitteistot/tilat: Tutkimusinfrastruktuuri

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abstract = "Visually black, electrically leaky, amorphous titania (am-TiO2) thin films were grown by atomic layer deposition (ALD) for photocatalytic applications. Broad spectral absorbance in the visible range and exceptional conductivity are attributed to trapped Ti3+ in the film. Oxidation of Ti3+ upon heat treatment leads to a drop in conductivity, a color change from black to white, and crystallization of am-TiO2. ALD-grown black TiO2, without any heat treatment, is subject to dissolution in alkaline photoelectrochemical conditions. The best photocatalytic activity for solar water splitting is obtained for completely crystalline white TiO2.",

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AU - Ali-Löytty, Harri

AU - Hannula, Markku

AU - Saari, Jesse

AU - Palmolahti, Lauri

AU - Bhuskute, Bela D.

AU - Ulkuniemi, Riina

AU - Nyyssönen, Tuomo

AU - Lahtonen, Kimmo

AU - Valden, Mika

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AB - Visually black, electrically leaky, amorphous titania (am-TiO2) thin films were grown by atomic layer deposition (ALD) for photocatalytic applications. Broad spectral absorbance in the visible range and exceptional conductivity are attributed to trapped Ti3+ in the film. Oxidation of Ti3+ upon heat treatment leads to a drop in conductivity, a color change from black to white, and crystallization of am-TiO2. ALD-grown black TiO2, without any heat treatment, is subject to dissolution in alkaline photoelectrochemical conditions. The best photocatalytic activity for solar water splitting is obtained for completely crystalline white TiO2.

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Diversity of TiO2: Controlling the molecular and electronic structure of atomic layer deposited black TiO2

Abstrakti

Rahoitus

YK:n kestävän kehityksen tavoitteet

Julkaisufoorumi-taso

Pääsy asiakirjaan

Sormenjälki

Laitteet

Fotoniikan materiaalit

Materiaalikarakterisointi (fysiikka)

Tampereen Mikroskopiakeskus

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