Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 296, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2021.123763
Keywords
Fe-TiO2; NO oxidation; Visible light driven photocatalysis; XPS; FT-IR
Categories
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2018R1D1A1B07040916, 2017R1D1A1B03034381]
- Korea Basic Science Institute [D110100]
- National Research Council of Science & Technology (NST), Republic of Korea [D110100] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2017R1D1A1B03034381] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The photocatalytic activities of two commercial TiO2 particles and their Fe-modified counterparts were studied under different conditions, showing that Fe-R996 exhibited higher activity than Fe-P25 under visible light and humid conditions.
The photocatalytic activities of two commercial TiO2 particles (P25 and R996) and their Fe-modified counterparts (Fe-P25 and Fe-R996) towards NO oxidation were examined under various light and humidity conditions (dry or humid conditions under UV or visible light irradiation). The photocatalytic activity of R996 increased upon the modification under all four experimental conditions but the Fe-R996 particles still exhibited lower activity than the P25-based photocatalytic particles (P25 and Fe-P25) under all of the conditions. However, when the particles were mixed with a surface hardening agent (SHA) and spread onto a cement block, Fe-R996 exhibited much higher photocatalytic activity than Fe-P25 under visible light irradiation and humid conditions in terms of NO3- evolution and NO removal. We highlight that not only the intrinsic structure of the photocatalyst powder but also the synergy between the medium embedding the photocatalytic particles and the photocatalyst should be considered in applications for air purification. (C) 2021 Elsevier Ltd. All rights reserved.
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