Photocatalytic surface reactions on indoor wall paint
Abstract
The reduction of indoor air pollutants by air cleaning systems has received considerable interest, and a number of techniques are now available. So far, the method of photocatalysis was mainly applied by use of titanium dioxide (TiO2) in flow reactors under UV light of high intensity. Nowadays, indoor wall paints are equipped with modified TiO2 to work as a catalyst under indoor daylight or artificial light. In chamber experiments carried out under indoor related conditions itwas shown thatthe method works for nitrogen dioxide with air exchange and for formaldehyde without air exchange at high concentrations. In further experiments with volatile organic compounds (VOCs), a small effect was found for terpenoids with high kOH rate constants. For other VOCs and carbon monoxide there was no degradation at all or the surface acted as a reversible sink. Secondary emissions from the reaction of paint constituents were observed on exposure to light. From the results it is concluded that recipes of photocatalytic wall paints need to be optimized for better efficiency under indoor conditions.
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In photocatalysis, electrons react with molecular oxygen through the reductive pathway to generate O2•−.
“In photocatalysis, electrons react with molecular oxygen through the reductive pathway to generate O2•− [45,46,47,48].”
From Superoxide Anion Chemistry—Its Role at the Core of the Innate Immunity (2023) · cites this paper as [45]
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Formaldehyde in the Indoor Environment
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- Authors
- Salthammer, T., & Fuhrmann, F.
- Affiliations
- Fraunhofer Institute for Wood Research Wilhelm-Klauditz-Institut (DE)
- Corresponding author
- Salthammer, T.
- ORCID
- Salthammer, T.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2007-08-17
- Volume
- 41
- Issue
- 18
- Pages
- 6573-6578
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W2053946196
- Cited by
- 153
- References
- 19
- Citations by year
- 2026: 4 · 2025: 4 · 2024: 5 · 2023: 9 · 2022: 12 · 2021: 7 · 2020: 15 · 2019: 10 · 2018: 12 · 2017: 9 · 2016: 10 · 2015: 13 · 2014: 7 · 2013: 6 · 2012: 7
- FWCI
- 4.17
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Environmental Science & Technology (publishedVersion)
- PubMed (publishedVersion)
- Publikationsdatenbank der Fraunhofer-Gesellschaft (Fraunhofer-Gesellschaft) (submittedVersion)
- Fraunhofer-Publica (Fraunhofer-Gesellschaft) (submittedVersion)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › TiO2 Photocatalysis and Solar Cells
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Indoor Air Quality and Microbial Exposure
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Advanced Photocatalysis Techniques
- Keywords
- photocatalysis, titanium dioxide, indoor air pollutants, formaldehyde, volatile organic compounds, terpenoids, carbon monoxide, air purification, secondary electron emission
- MeSH terms
- Carbon Monoxide, Light, Organic Chemicals, Paint, Photochemistry, Titanium, Ultraviolet Rays, Volatilization, Air Pollution, Indoor
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