Visible light-responsive Fe-loaded TiO2 photocatalysts for total oxidation of acetaldehyde: Fundamental studies towards large-scale production and applications
- Authors
- Saqlain, S[Saqlain, Shahid]; Cha, BJ[Cha, Byeong Jun]; Kim, SY[Kim, Soong Yeon]; Ahn, TK[Ahn, Tae Kyu]; Park, C[Park, Cheolwoo]; Oh, JM[Oh, Ju-Myung]; Jeong, EC[Jeong, Eun Cheol]; Seo, HO[Seo, Hyun Ook]; Kim, YD[Kim, Young Dok]
- Issue Date
- Mar-2020
- Publisher
- ELSEVIER
- Keywords
- Visible light responsive catalyst; High-performing photocatalyst; Volatile organic compounds (VOCs); Large scale production; Real applications
- Citation
- APPLIED SURFACE SCIENCE, v.505
- Indexed
- SCIE
SCOPUS
- Journal Title
- APPLIED SURFACE SCIENCE
- Volume
- 505
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/5345
- DOI
- 10.1016/j.apsusc.2019.144160
- ISSN
- 0169-4332
- Abstract
- Various Fe loadings were applied onto P25 TiO2 using temperature-controlled vapour deposition and the resulting structures were subsequently annealed at 750 degrees C. As-received TiO2 was nearly photo-catalytically inactive for acetaldehyde decomposition under visible light, but when a very small amount of Fe below the threshold was loaded, the activity became maximized. Control of Fe loading is critical to prepare high-performing Fe-TiO2 photocatalysts since a larger amount of Fe forms larger iron oxide particles, which induces non-radiative recombination of the optically excited electron-hole pairs, thereby reducing the photocatalytic activity. Regarding the reaction mechanism, fast oxidation of acetaldehyde into CO2 and a slower path via acetic acid to CO2 were identified, where almost no evolution of secondary pollutant vapour was identified. A strategy towards large-scale production and stable fixation of photocatalyst powder on surfaces of construction materials for real air purification applications are discussed.
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- Appears in
Collections - Graduate School > Chemistry > 1. Journal Articles
- Graduate School > Energy Science > 1. Journal Articles
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