Enhanced photocatalytic activity of potassium-doped titania photocatalyst films with nanosheet structure

Sujun Guan; Taito Watabe; Liang Hao; Hiroyuki Yoshida; Yanling Cheng; Kaowen Zhou; Yun Lu

doi:10.1016/j.matlet.2019.01.136

Enhanced photocatalytic activity of potassium-doped titania photocatalyst films with nanosheet structure

Sujun Guan, Taito Watabe, Liang Hao, Hiroyuki Yoshida, Yanling Cheng, Kaowen Zhou, Yun Lu

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

8 Scopus citations

Abstract

Potassium-doped titania (K-doped TiO ₂ ) films had been prepared by molten-salt treatment in KNO ₃ for Ti-TiC coatings, containing different amount of TiC, in order to achieve enhanced activity of the films. When the amount of TiC is lower than 40%, the partial surface morphology of K-doped TiO ₂ films clearly shows a nanosheet structure, and the formed nanosheets could increase the accessible surface area. The results show that K-doped TiO ₂ with composite crystals has formed with different amount of TiC, and the relative Raman peak intensity of Ti-O-K bonding is highest for 40% TiC. Even avoiding high adsorption of K-doped TiO ₂ films, the films exhibit excellent and stable photocatalytic activity. With increasing the amount of TiC, the photocatalytic activity of K-doped TiO ₂ films first increases then decreases, reaching the highest for 40% TiC.

Original language	English (US)
Pages (from-to)	174-178
Number of pages	5
Journal	Materials Letters
Volume	242
DOIs	https://doi.org/10.1016/j.matlet.2019.01.136
State	Published - May 1 2019
Externally published	Yes

Keywords

K-doped TiO
Molten salt of KNO
Nanosheet
Photocatalyst films
Photocatalytic activity

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@article{2b022c9683da41c99155dc5af13d1bfb,

title = "Enhanced photocatalytic activity of potassium-doped titania photocatalyst films with nanosheet structure",

abstract = " Potassium-doped titania (K-doped TiO 2 ) films had been prepared by molten-salt treatment in KNO 3 for Ti-TiC coatings, containing different amount of TiC, in order to achieve enhanced activity of the films. When the amount of TiC is lower than 40%, the partial surface morphology of K-doped TiO 2 films clearly shows a nanosheet structure, and the formed nanosheets could increase the accessible surface area. The results show that K-doped TiO 2 with composite crystals has formed with different amount of TiC, and the relative Raman peak intensity of Ti-O-K bonding is highest for 40% TiC. Even avoiding high adsorption of K-doped TiO 2 films, the films exhibit excellent and stable photocatalytic activity. With increasing the amount of TiC, the photocatalytic activity of K-doped TiO 2 films first increases then decreases, reaching the highest for 40% TiC. ",

keywords = "K-doped TiO, Molten salt of KNO, Nanosheet, Photocatalyst films, Photocatalytic activity",

author = "Sujun Guan and Taito Watabe and Liang Hao and Hiroyuki Yoshida and Yanling Cheng and Kaowen Zhou and Yun Lu",

year = "2019",

month = may,

day = "1",

doi = "10.1016/j.matlet.2019.01.136",

language = "English (US)",

volume = "242",

pages = "174--178",

journal = "Materials Letters",

issn = "0167-577X",

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TY - JOUR

T1 - Enhanced photocatalytic activity of potassium-doped titania photocatalyst films with nanosheet structure

AU - Guan, Sujun

AU - Watabe, Taito

AU - Hao, Liang

AU - Yoshida, Hiroyuki

AU - Cheng, Yanling

AU - Zhou, Kaowen

AU - Lu, Yun

PY - 2019/5/1

Y1 - 2019/5/1

N2 - Potassium-doped titania (K-doped TiO 2 ) films had been prepared by molten-salt treatment in KNO 3 for Ti-TiC coatings, containing different amount of TiC, in order to achieve enhanced activity of the films. When the amount of TiC is lower than 40%, the partial surface morphology of K-doped TiO 2 films clearly shows a nanosheet structure, and the formed nanosheets could increase the accessible surface area. The results show that K-doped TiO 2 with composite crystals has formed with different amount of TiC, and the relative Raman peak intensity of Ti-O-K bonding is highest for 40% TiC. Even avoiding high adsorption of K-doped TiO 2 films, the films exhibit excellent and stable photocatalytic activity. With increasing the amount of TiC, the photocatalytic activity of K-doped TiO 2 films first increases then decreases, reaching the highest for 40% TiC.

AB - Potassium-doped titania (K-doped TiO 2 ) films had been prepared by molten-salt treatment in KNO 3 for Ti-TiC coatings, containing different amount of TiC, in order to achieve enhanced activity of the films. When the amount of TiC is lower than 40%, the partial surface morphology of K-doped TiO 2 films clearly shows a nanosheet structure, and the formed nanosheets could increase the accessible surface area. The results show that K-doped TiO 2 with composite crystals has formed with different amount of TiC, and the relative Raman peak intensity of Ti-O-K bonding is highest for 40% TiC. Even avoiding high adsorption of K-doped TiO 2 films, the films exhibit excellent and stable photocatalytic activity. With increasing the amount of TiC, the photocatalytic activity of K-doped TiO 2 films first increases then decreases, reaching the highest for 40% TiC.

KW - K-doped TiO

KW - Molten salt of KNO

KW - Nanosheet

KW - Photocatalyst films

KW - Photocatalytic activity

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VL - 242

SP - 174

EP - 178

JO - Materials Letters

JF - Materials Letters

ER -

Enhanced photocatalytic activity of potassium-doped titania photocatalyst films with nanosheet structure

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Keywords

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