The project “2D PHOTOSTRUCTURE” aims at the development of photocatalytic coatings containing g-C3N4/TiO2 heterostructures, for indoor and outdoor air purification. During this project, g-C3N4/TiO2 heterostructures will be synthesized in order to create coatings suitable for oxidation of gaseous indoor (acetaldehyde, acetone etc) and outdoor (NOx etc) pollutants, with simultaneous antibacterial activity.
The heterostructures will be prepared at NCSR Demokritos with conjugation of the two semiconductors by modifying their surface charges. The heterostructures will be further processed with metallic salts and alkaline earths, in order to enhance their activity under visible light irradiation and their adsorption capacity of gaseous pollutants respectively. Furthermore, their photocatalytic activity for oxidation of gaseous pollutants and their antibacterial activity will be evaluated using ISO procedures already developed in the “Nanocomposite and Nanofunctional Materials” laboratory. In cooperation with NanoPhos SA, the development of photocatalytic coatings with addition of the new heterostructures will follow. Specially designed sites of NanoPhos SA will be coated with the new materials in order to make an in situ realistic assessment of their photocatalytic properties and their viability on the market. The activity of the new products for air purification from gaseous pollutants as well as their antibacterial activity will be examined.
The innovation of the new products lies in their unique flexibility and the control capability. Due to the different modification of the added g-C3N4/TiO2 heterostructures, the coatings can be applied in either outdoor or indoor spaces, utilizing UV and/or visible radiation respectively. At the same time, the coating of walls and surfaces is made easy and straightforward with the aerosol techniques already developed by NanoPhos SA, that do not require mixing with colors etc. Therefore, the new photocatalytic coatings are expected to have direct and positive impact on the market, offering efficient air purification with low-cost and easy-to-use application.