Abstract
A method to prevent sintering of photocatalytic particles in a calcination process is developed to allow their crystallization without a significant decrease in their specific surface area. A sacrificial layer of polymer to prevent the particle from sintering was employed for the crystallization of amorphous titania particles in the heat treatment at 500 °C. The heat treatment simultaneously removed the polymer layer by pyrolysis. The heat treatment using a sacrificial layer of polymer could suppress a decrease in the specific surface area of titania particles and also maintain colloidal stability in water, attaining a photocatalytic activity higher than that without using a sacrificial layer. These results indicate that the polymer-coating technique is effective for crystallization of photocatalytic particles without a loss of both colloidal stability and photocatalytic activity of the particles.
Original language | English |
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Article number | 124782 |
Journal | Colloids and Surfaces A: Physicochemical and Engineering Aspects |
Volume | 599 |
DOIs | |
Publication status | Published - 2020 Aug 20 |
Keywords
- Aggregation
- Colloidal stability
- Photocatalyst
- Polymer coating
- Sintering
- Titanium dioxide
ASJC Scopus subject areas
- Surfaces and Interfaces
- Physical and Theoretical Chemistry
- Colloid and Surface Chemistry