Improvement of the Photocatalytic Activity of Au/TiO 2 Nanocomposites by Prior Treatment of TiO 2 with Microplasma in an NH 3 and H 2 O 2 Solution

Nguyen Thi Thu Thuy, Do Hoang Tung, Le Hong Manh, Pham Hong Minh and Nguyen The Hien
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Nguyen Thi Thu Thuy: Faculty of Engineering Physics and Nanotechnology, VNU University of Engineering and Technology, 144 Xuan Thuy Road, Cau Giay District, Hanoi 10000, Vietnam
Do Hoang Tung: Institute of Physics, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Street, Cau Giay District, Hanoi 10000, Vietnam
Le Hong Manh: Institute of Physics, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Street, Cau Giay District, Hanoi 10000, Vietnam
Pham Hong Minh: Institute of Physics, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Street, Cau Giay District, Hanoi 10000, Vietnam
Nguyen The Hien: Faculty of Engineering Physics and Nanotechnology, VNU University of Engineering and Technology, 144 Xuan Thuy Road, Cau Giay District, Hanoi 10000, Vietnam

J, 2022, vol. 5, issue 2, 1-10

Abstract: Plasmonic photocatalytic nanocomposites of TiO 2 and Au nanoparticles (NPs) have recently attracted the attention of researchers, who aim to improve the photocatalytic activity of potential TiO 2 NPs. In this study, we report photocatalytic activity enhancement for a Au/TiO 2 nanocomposite prepared by the plasma–liquid interaction method using an atmospheric microplasma apparatus. The enhanced photocatalytic activity of the prepared Au/TiO 2 is demonstrated by the degradation of methylene blue (MB) in water under both ultraviolet (UV) and visible light irradiation. The prior treatment of TiO 2 with microplasma in a NH 3 and H 2 O 2 solution is found to strongly improve the photocatalytic activity of both the treated TiO 2 NPs, as well as the synthesized Au/TiO 2 nanocomposite.

Keywords: nanocomposite; microplasma–liquid; photocatalytic (search for similar items in EconPapers)
JEL-codes: I1 I10 I12 I13 I14 I18 I19 (search for similar items in EconPapers)
Date: 2022
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