Preparation and Real World Applications of Titania Composite Materials for Photocatalytic Surface, Air, and Water Purification: State of the Art

  • The semiconducting transition metal oxide TiO2 is a rather cheap and non-toxic material with superior photocatalytic properties. TiO2 thin films and nanoparticles are known to have antibacterial, antiviral, antifungal, antialgal, self, water, and air-cleaning properties under UV or sun light irradiation. Based on these excellent qualities, titania holds great promises in various fields of applications. The vast majority of published field and pilot scale studies are dealing with the modification of building materials or generally focus on air purification. Based on the reviewed papers, for the coating of glass, walls, ceilings, streets, tunnels, and other large surfaces, titania is usually applied by spray-coating due to the scalibility and cost-efficiency of this method compared to alternative coating procedures. In contrast, commercialized applications of titania in medical fields or in water purification are rarely found. Moreover, in many realistic test scenarios it becomes evident that the photocatalytic activity is oftenThe semiconducting transition metal oxide TiO2 is a rather cheap and non-toxic material with superior photocatalytic properties. TiO2 thin films and nanoparticles are known to have antibacterial, antiviral, antifungal, antialgal, self, water, and air-cleaning properties under UV or sun light irradiation. Based on these excellent qualities, titania holds great promises in various fields of applications. The vast majority of published field and pilot scale studies are dealing with the modification of building materials or generally focus on air purification. Based on the reviewed papers, for the coating of glass, walls, ceilings, streets, tunnels, and other large surfaces, titania is usually applied by spray-coating due to the scalibility and cost-efficiency of this method compared to alternative coating procedures. In contrast, commercialized applications of titania in medical fields or in water purification are rarely found. Moreover, in many realistic test scenarios it becomes evident that the photocatalytic activity is often significantly lower than in laboratory settings. In this review, we will give an overview on the most relevant real world applications and commonly applied preparation methods for these purposes. We will also look at the relevant bottlenecks such as visible light photocatalytic activity and long-term stability and will make suggestions to overcome these hurdles for a widespread usage of titania as photocalyst.show moreshow less

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Metadaten
Author:Volker SeißORCiD, Susanne ThielORCiD, Maik EichelbaumORCiD
DOI:https://doi.org/10.3390/inorganics10090139
ISSN:2304-6740
Parent Title (English):Inorganics
Publisher:MDPI AG
Document Type:Article
Language:English
Date of first Publication:2022/09/15
Reviewed:Begutachtet/Reviewed
Release Date:2024/06/17
Tag:TiO2 photocatalysis; semiconductor thin films; antiviral and antibacterial properties; air purification; water purification; easy-to-clean effect; disinfection
Volume:10
Issue:9
Article Number:139
institutes:Institut für Angewandte Wasserstoffforschung, Elektro- und Thermochemische Energiesysteme (H2Ohm)
Fakultät für Angewandte Chemie
Research Themes:Energie & Ressourcen
Licence (German):Creative Commons - CC BY - Namensnennung 4.0 International
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