2D Photocatalytic Heterostructures for Air Pollutants Oxidation


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Christos Trapalis







The project "2D PHOTOSTRUCTURE" aims at the development of photocatalytic coatings containing g-C3N4/TiO2 heterostructures, for indoor and outdoor air purification. In this project, g-C3N4/TiO2 heterostructures will be synthesized in order to create coatings suitable for oxidation of gaseous indoor (acetaldehyde) and outdoor (NOx) 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, they will be fully characterized by methods available at NCSR Demokritos, while their photocatalytic activity for oxidation of gaseous pollutants and their antibacterial activity will also 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. With the expertise of NanoPhos SA, specific solutions for the photocatalytic coatings spraying will be created. 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.

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