A photocatalyst is a semiconducting substance that can be chemically activated by light radiation triggering an oxidation-reduction (redox) reaction. Titanium dioxide (TiO2) with a crystal structure of anatase type has been found to be the most effective photocatalyst, being widely used as pigment for paints and cosmetics. More recently it extended its application to the construction sector – mixed into cement and concrete to create self-cleaning surfaces. Within this project, we aim to investigate the impact of using TiO2 as a photocatalyst for 3DP concrete (3DPC) to develop self-cleaning printed walls.
Photocatalytic activation on self-cleaning concrete (S. S. Lucas, 2018)