Formation of TiO                         2                          layers on commercially pure Ti and Ti-Mo and Ti-Nb alloys by two-step thermal oxidation and their photocatalytic activity

Shota Sado; Takatoshi Ueda; Kyosuke Ueda; Takayuki Narushima

doi:10.1016/j.apsusc.2015.09.211

Formation of TiO ₂ layers on commercially pure Ti and Ti-Mo and Ti-Nb alloys by two-step thermal oxidation and their photocatalytic activity

Shota Sado, Takatoshi Ueda, Kyosuke Ueda, Takayuki Narushima

ENG - Materials Processing

Tohoku University

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

11 Citations (Scopus)

Abstract

Anatase-containing TiO ₂ layers were formed on commercially pure (CP) Ti and Ti-25mass%Mo (Ti-25Mo) and Ti-25mass%Nb (Ti-25Nb) alloys by two-step thermal oxidation. The first-step treatment was conducted in an Ar-1%CO atmosphere at 1073 K for 3.6 ks, and the second-step treatment was conducted in air at 673-1073 K for 10.8 ks. The second-step temperature range for anatase formation was wider in the Ti alloys than in CP Ti. Photo-induced superhydrophilicity under UV irradiation was observed for the TiO ₂ layers with anatase fractions ≥0.6 on CP Ti and the Ti-25Mo alloy, and with anatase fractions ≥0.18 on the Ti-25Nb alloy. The TiO ₂ layers on the Ti-25Nb alloy exhibited excellent photocatalytic activity in the low anatase fraction region, which is considered to be caused by the incorporation of 1-3 at% Nb into the TiO ₂ layers. The rate constant of methylene blue degradation showed maxima at anatase fractions of 0.6-0.9.

Original language	English
Pages (from-to)	2198-2205
Number of pages	8
Journal	Applied Surface Science
Volume	357
DOIs	https://doi.org/10.1016/j.apsusc.2015.09.211
Publication status	Published - 2015 Dec 1

Keywords

Anatase
Photocatalysis
Thermal oxidation
Titanium alloy
Titanium dioxide

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Sado, S., Ueda, T., Ueda, K., & Narushima, T. (2015). Formation of TiO ₂ layers on commercially pure Ti and Ti-Mo and Ti-Nb alloys by two-step thermal oxidation and their photocatalytic activity Applied Surface Science, 357, 2198-2205. https://doi.org/10.1016/j.apsusc.2015.09.211

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title = " Formation of TiO 2 layers on commercially pure Ti and Ti-Mo and Ti-Nb alloys by two-step thermal oxidation and their photocatalytic activity ",

abstract = " Anatase-containing TiO 2 layers were formed on commercially pure (CP) Ti and Ti-25mass%Mo (Ti-25Mo) and Ti-25mass%Nb (Ti-25Nb) alloys by two-step thermal oxidation. The first-step treatment was conducted in an Ar-1%CO atmosphere at 1073 K for 3.6 ks, and the second-step treatment was conducted in air at 673-1073 K for 10.8 ks. The second-step temperature range for anatase formation was wider in the Ti alloys than in CP Ti. Photo-induced superhydrophilicity under UV irradiation was observed for the TiO 2 layers with anatase fractions ≥0.6 on CP Ti and the Ti-25Mo alloy, and with anatase fractions ≥0.18 on the Ti-25Nb alloy. The TiO 2 layers on the Ti-25Nb alloy exhibited excellent photocatalytic activity in the low anatase fraction region, which is considered to be caused by the incorporation of 1-3 at% Nb into the TiO 2 layers. The rate constant of methylene blue degradation showed maxima at anatase fractions of 0.6-0.9.",

keywords = "Anatase, Photocatalysis, Thermal oxidation, Titanium alloy, Titanium dioxide",

author = "Shota Sado and Takatoshi Ueda and Kyosuke Ueda and Takayuki Narushima",

note = "Funding Information: The authors would like to thank Dr. K. Kobayashi, Ms. M. Nemoto, and Ms. K. Omura of Tohoku University for TEM, Raman spectroscopic, and XPS analyses, respectively. This study was partially supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan (No. 25249094 ), and MEXT special expenditures: Innovative Research for Biosis-Abiosis Intelligent Interface. Publisher Copyright: {\textcopyright} 2015 Elsevier B.V. All rights reserved.",

year = "2015",

month = dec,

day = "1",

doi = "10.1016/j.apsusc.2015.09.211",

language = "English",

volume = "357",

pages = "2198--2205",

journal = "Applied Surface Science",

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Sado, S, Ueda, T, Ueda, K & Narushima, T 2015, ' Formation of TiO ₂ layers on commercially pure Ti and Ti-Mo and Ti-Nb alloys by two-step thermal oxidation and their photocatalytic activity ', Applied Surface Science, vol. 357, pp. 2198-2205. https://doi.org/10.1016/j.apsusc.2015.09.211

Formation of TiO ₂ layers on commercially pure Ti and Ti-Mo and Ti-Nb alloys by two-step thermal oxidation and their photocatalytic activity . / Sado, Shota; Ueda, Takatoshi; Ueda, Kyosuke et al.
In: Applied Surface Science, Vol. 357, 01.12.2015, p. 2198-2205.

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

TY - JOUR

T1 - Formation of TiO 2 layers on commercially pure Ti and Ti-Mo and Ti-Nb alloys by two-step thermal oxidation and their photocatalytic activity

AU - Sado, Shota

AU - Ueda, Takatoshi

AU - Ueda, Kyosuke

AU - Narushima, Takayuki

N1 - Funding Information: The authors would like to thank Dr. K. Kobayashi, Ms. M. Nemoto, and Ms. K. Omura of Tohoku University for TEM, Raman spectroscopic, and XPS analyses, respectively. This study was partially supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan (No. 25249094 ), and MEXT special expenditures: Innovative Research for Biosis-Abiosis Intelligent Interface. Publisher Copyright: © 2015 Elsevier B.V. All rights reserved.

PY - 2015/12/1

Y1 - 2015/12/1

N2 - Anatase-containing TiO 2 layers were formed on commercially pure (CP) Ti and Ti-25mass%Mo (Ti-25Mo) and Ti-25mass%Nb (Ti-25Nb) alloys by two-step thermal oxidation. The first-step treatment was conducted in an Ar-1%CO atmosphere at 1073 K for 3.6 ks, and the second-step treatment was conducted in air at 673-1073 K for 10.8 ks. The second-step temperature range for anatase formation was wider in the Ti alloys than in CP Ti. Photo-induced superhydrophilicity under UV irradiation was observed for the TiO 2 layers with anatase fractions ≥0.6 on CP Ti and the Ti-25Mo alloy, and with anatase fractions ≥0.18 on the Ti-25Nb alloy. The TiO 2 layers on the Ti-25Nb alloy exhibited excellent photocatalytic activity in the low anatase fraction region, which is considered to be caused by the incorporation of 1-3 at% Nb into the TiO 2 layers. The rate constant of methylene blue degradation showed maxima at anatase fractions of 0.6-0.9.

AB - Anatase-containing TiO 2 layers were formed on commercially pure (CP) Ti and Ti-25mass%Mo (Ti-25Mo) and Ti-25mass%Nb (Ti-25Nb) alloys by two-step thermal oxidation. The first-step treatment was conducted in an Ar-1%CO atmosphere at 1073 K for 3.6 ks, and the second-step treatment was conducted in air at 673-1073 K for 10.8 ks. The second-step temperature range for anatase formation was wider in the Ti alloys than in CP Ti. Photo-induced superhydrophilicity under UV irradiation was observed for the TiO 2 layers with anatase fractions ≥0.6 on CP Ti and the Ti-25Mo alloy, and with anatase fractions ≥0.18 on the Ti-25Nb alloy. The TiO 2 layers on the Ti-25Nb alloy exhibited excellent photocatalytic activity in the low anatase fraction region, which is considered to be caused by the incorporation of 1-3 at% Nb into the TiO 2 layers. The rate constant of methylene blue degradation showed maxima at anatase fractions of 0.6-0.9.

KW - Anatase

KW - Photocatalysis

KW - Thermal oxidation

KW - Titanium alloy

KW - Titanium dioxide

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DO - 10.1016/j.apsusc.2015.09.211

M3 - Article

AN - SCOPUS:84950985173

SN - 0169-4332

VL - 357

SP - 2198

EP - 2205

JO - Applied Surface Science

JF - Applied Surface Science

ER -

Formation of TiO ₂ layers on commercially pure Ti and Ti-Mo and Ti-Nb alloys by two-step thermal oxidation and their photocatalytic activity

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Keywords

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