A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Au-TiO2/SiO2 photocatalysts for building materials: Self-cleaning and de-polluting performance
https://orcid.org/0000-0002-7534-3687
https://orcid.org/0000-0002-4632-0195
Abstract TiO2 is a photocatalytic material that has proven to have the ability to produce self-cleaning and de-polluting building materials, which can be a valuable alternative to mitigate the pollution consequences. However, the TiO2 performance is limited in outdoor conditions due to its exclusive UV absorption. In this work, Au-TiO2 photocatalysts were integrated into a silica sol-gel synthesis in order to produce long-lasting coatings with self-cleaning and de-polluting properties on building materials. This simple synthesis allows the in situ application on buildings. The enhancement of TiO2 photoactivity by AuNPs was clearly demonstrated. The self-cleaning and de-polluting properties were evaluated using soot and NO, respectively, showing that AuNPs promote the TiO2 performance. In addition, the role of AuNPs size and their loading on TiO2 performance were investigated. It was demonstrated that the smallest AuNPs size (13 nm) and the intermedium gold content (0.5% w/w Au/TiO2) show the highest photoactivity.
Graphical abstract Display Omitted
Highlights Au-TiO2/SiO2 coating with self-cleaning and de-polluting activities were developed. The Au-TiO2/SiO2 sols can be applied in situ on building materials by common methods. The sols spontaneously gel in the substrate producing the photocatalytic coating. The silica matrix promotes the TiO2 adherence to the substrate. The AuNPs produced an evident enhancement of self-cleaning and depolluting activities.
Au-TiO2/SiO2 photocatalysts for building materials: Self-cleaning and de-polluting performance
https://orcid.org/0000-0002-7534-3687
https://orcid.org/0000-0002-4632-0195
Abstract TiO2 is a photocatalytic material that has proven to have the ability to produce self-cleaning and de-polluting building materials, which can be a valuable alternative to mitigate the pollution consequences. However, the TiO2 performance is limited in outdoor conditions due to its exclusive UV absorption. In this work, Au-TiO2 photocatalysts were integrated into a silica sol-gel synthesis in order to produce long-lasting coatings with self-cleaning and de-polluting properties on building materials. This simple synthesis allows the in situ application on buildings. The enhancement of TiO2 photoactivity by AuNPs was clearly demonstrated. The self-cleaning and de-polluting properties were evaluated using soot and NO, respectively, showing that AuNPs promote the TiO2 performance. In addition, the role of AuNPs size and their loading on TiO2 performance were investigated. It was demonstrated that the smallest AuNPs size (13 nm) and the intermedium gold content (0.5% w/w Au/TiO2) show the highest photoactivity.
Graphical abstract Display Omitted
Highlights Au-TiO2/SiO2 coating with self-cleaning and de-polluting activities were developed. The Au-TiO2/SiO2 sols can be applied in situ on building materials by common methods. The sols spontaneously gel in the substrate producing the photocatalytic coating. The silica matrix promotes the TiO2 adherence to the substrate. The AuNPs produced an evident enhancement of self-cleaning and depolluting activities.
Au-TiO2/SiO2 photocatalysts for building materials: Self-cleaning and de-polluting performance
https://orcid.org/0000-0002-7534-3687
https://orcid.org/0000-0002-4632-0195
Abstract TiO2 is a photocatalytic material that has proven to have the ability to produce self-cleaning and de-polluting building materials, which can be a valuable alternative to mitigate the pollution consequences. However, the TiO2 performance is limited in outdoor conditions due to its exclusive UV absorption. In this work, Au-TiO2 photocatalysts were integrated into a silica sol-gel synthesis in order to produce long-lasting coatings with self-cleaning and de-polluting properties on building materials. This simple synthesis allows the in situ application on buildings. The enhancement of TiO2 photoactivity by AuNPs was clearly demonstrated. The self-cleaning and de-polluting properties were evaluated using soot and NO, respectively, showing that AuNPs promote the TiO2 performance. In addition, the role of AuNPs size and their loading on TiO2 performance were investigated. It was demonstrated that the smallest AuNPs size (13 nm) and the intermedium gold content (0.5% w/w Au/TiO2) show the highest photoactivity.
Graphical abstract Display Omitted
Highlights Au-TiO2/SiO2 coating with self-cleaning and de-polluting activities were developed. The Au-TiO2/SiO2 sols can be applied in situ on building materials by common methods. The sols spontaneously gel in the substrate producing the photocatalytic coating. The silica matrix promotes the TiO2 adherence to the substrate. The AuNPs produced an evident enhancement of self-cleaning and depolluting activities.
Au-TiO2/SiO2 photocatalysts for building materials: Self-cleaning and de-polluting performance
Luna, Manuel (author) / Mosquera, María J. (author) / Vidal, Hilario (author) / Gatica, José M. (author)
Building and Environment ; 164
2019-08-15
Article (Journal)
Electronic Resource
English
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