Uniform Fabrication of Hollow Titania Using Anionic Modified Acrylated Polymer Template for Phase Composition Effect...

Area of Science:

• Materials Science
• Nanotechnology
• Photocatalysis

Background:

• Near-infrared (NIR)-reflective coatings offer energy-saving potential but suffer from performance degradation due to surface contamination.
• Maintaining long-term performance of these coatings necessitates regular surface cleaning to remove contaminants that reduce reflectance.

Purpose of the Study:

• To develop sustainable, anti-contaminating infrared (IR)-reflective coatings using synthesized hollow titania (TiO₂) as a photocatalyst.
• To investigate the impact of hollow titania photocatalysts on the self-cleaning properties and thermal shielding capabilities of IR-reflective coatings.

Main Methods:

• Synthesized hollow TiO₂ shells on methacrylic acid-modified anionic polystyrene cores.
• Investigated the effect of sintering temperature on TiO₂ phase composition, light absorption, and photocatalytic activity.
• Evaluated photocatalytic degradation of methyl orange and methylene blue.
• Measured surface reflectance and thermal profiling of coated steel.

Main Results:

• Phase composition and photocatalytic activity (methyl orange decomposition) were enhanced with increasing sintering temperature.
• Hollow titania particles demonstrated dust degradation characteristics, confirmed by methylene blue decomposition.
• Coated steel exhibited improved reflectance and thermal shielding due to the anti-contamination properties.

Conclusions:

• Hollow titania photocatalysts effectively impart anti-contamination properties to IR-reflective coatings.
• The developed coatings show enhanced durability and energy-saving potential through self-cleaning and improved thermal shielding.
• This approach offers a sustainable solution for maintaining the performance of energy-saving coatings.