Alkali Metal Chloride Flux Growth of Ilmenite-Type ZnTiO3 and Subsequent Nitrogen Doping for Visible-Light-Driven Water Oxidation Catalysis

Hajime Wagata, Kenta Sakakibara, Kenta Kawashima, Mirabbos Hojamberdiev, Kunio Yubuta, Katsuya Teshima

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The polyhedral-shaped ilmenite-type ZnTiO3 crystals with well-developed facets were grown from alkali metal chloride fluxes (ACl, A = Li, Na, K, Rb, and Cs). NaCl and CsCl were observed to be the most suitable fluxes for growing ilmenite-type ZnTiO3 crystals without impurity phases. Doping nitrogen into the crystals was achieved via heating under the continuous flow of ammonia gas (NH3). The resulting crystals exhibited enhanced photon harvesting capacity while still maintaining their original crystal phase (i.e., ZnTiO3). The introduction of nitrogen into the lattice was confirmed through analytical techniques used for investigating the surface chemical states and bulk chemical compositions. The N-doped ZnTiO3 served as a competent photocatalyst for water oxidations in AgNO3 aqueous solutions under visible light irradiation.

Original languageEnglish
Pages (from-to)7762-7771
Number of pages10
JournalACS Applied Energy Materials
Volume2
Issue number11
DOIs
Publication statusPublished - 25 Nov 2019

Fingerprint

Alkali Metals
Ilmenite
Alkali metals
Catalysis
Chlorides
Nitrogen
Doping (additives)
Fluxes
Oxidation
Crystals
Water
Crystal impurities
Photocatalysts
Ammonia
Photons
Gases
Irradiation
Heating
ilmenite
Chemical analysis

Keywords

  • ZnTiO
  • alkali metal chloride flux
  • flux method
  • nitrogen doping
  • visible-light-driven photocatalyst

Cite this

Wagata, Hajime ; Sakakibara, Kenta ; Kawashima, Kenta ; Hojamberdiev, Mirabbos ; Yubuta, Kunio ; Teshima, Katsuya. / Alkali Metal Chloride Flux Growth of Ilmenite-Type ZnTiO3 and Subsequent Nitrogen Doping for Visible-Light-Driven Water Oxidation Catalysis. In: ACS Applied Energy Materials. 2019 ; Vol. 2, No. 11. pp. 7762-7771.
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Alkali Metal Chloride Flux Growth of Ilmenite-Type ZnTiO3 and Subsequent Nitrogen Doping for Visible-Light-Driven Water Oxidation Catalysis. / Wagata, Hajime; Sakakibara, Kenta; Kawashima, Kenta; Hojamberdiev, Mirabbos; Yubuta, Kunio; Teshima, Katsuya.

In: ACS Applied Energy Materials, Vol. 2, No. 11, 25.11.2019, p. 7762-7771.

Research output: Contribution to journalArticle

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AU - Wagata, Hajime

AU - Sakakibara, Kenta

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AU - Yubuta, Kunio

AU - Teshima, Katsuya

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