Photocatalytic and Antimicrobial Properties of Ag2O/TiO2 Heterojunction

Endo-Kimura, Maya; Janczarek, Marcin; Bielan, Zuzanna et al.

ChemEngineering, 2019, 3(1), 3

Permalink : https://hdl.handle.net/2115/86415

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https://doi.org/10.3390/chemengineering3010003      

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アクセス権
metadata only access
URI
https://hdl.handle.net/2115/86415
タイトル
Photocatalytic and Antimicrobial Properties of Ag2O/TiO2 Heterojunction
著者
Endo-Kimura, Maya ; Janczarek, Marcin ; Bielan, Zuzanna ; Zhang, Dong ; Wang, Kunlei ; Markowska-Szczupak, Agata ; Kowalska, Ewa
著者名
Endo-Kimura, Maya
著者名
Janczarek, Marcin
著者名
Bielan, Zuzanna
著者名
Zhang, Dong
著者名
Wang, Kunlei
著者名
Markowska-Szczupak, Agata
ORCID
0000-0003-0955-9268
著者名
Kowalska, Ewa
キーワード
heterogeneous photocatalysis
nanocomposites
heterojunction
Ag2O
TiO2
antimicrobial properties
発行日
2019-03
出版者
MDPI
収録物名
ChemEngineering
巻(号)
3(1)
ページ
3
抄録
Ag2O/TiO2 heterojunctions were prepared by a simple method, i.e., the grinding of argentous oxide with six different titania photocatalysts. The physicochemical properties of the obtained photocatalysts were characterized by diffuse-reflectance spectroscopy (DRS), X-ray powder diffraction (XRD) and scanning transmission electron microscopy (STEM) with an energy dispersive X-ray spectroscopy (EDS). The photocatalytic activity was investigated for the oxidative decomposition of acetic acid and methanol dehydrogenation under UV/vis irradiation and for the oxidative decomposition of phenol and 2-propanol under vis irradiation. Antimicrobial properties were tested for bacteria (Escherichia coli) and fungi (Candida albicans and Penicillium chrysogenum) under UV and vis irradiation and in the dark. Enhanced activity was observed under UV/vis (with synergism for fine anatase-containing samples) and vis irradiation for almost all samples. This suggests a hindered recombination of charge carriers by p-n heterojunction or Z-scheme mechanisms under UV irradiation and photo-excited electron transfer from Ag2O to TiO2 under vis irradiation. Improved antimicrobial properties were achieved, especially under vis irradiation, probably due to electrostatic attractions between the negative surface of microorganisms and the positively charged Ag2O.
資源タイプ
学術雑誌論文
出版タイプ
Version of Record
EISSN
2305-7084
関連情報 (isIdenticalTo)
出版社版DOI
https://doi.org/10.3390/chemengineering3010003