| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Alternative Processes (Beyond the Beam)
|
| Presentation Title |
Additive Manufacturing of Photocatalytic Materials for Solar Water Disinfection |
| Author(s) |
Andrey Vyatskikh, Kai Liu, Carlos M. Portela, Akira Kudo, Stephane Delalande, Michael R. Hoffmann, Julia R. Greer |
| On-Site Speaker (Planned) |
Andrey Vyatskikh |
| Abstract Scope |
Photocatalytic materials, such as titanium dioxide (titania, TiO2), can harvest sunlight to promote generation of reactive oxygen species (ROS) that damage and deactivate waterborne pathogens. Here, we study the effects of 3D architecture of photocatalytic materials on the efficiency of solar water treatment. We have developed a stereolithography-based additive manufacturing (AM) process for TiO2. We synthesize pre-ceramic photoresists using hybrid organic-inorganic materials, pattern them using a stereolithography apparatus, and pyrolyze them in air at 1300C to remove the organic content. We demonstrate this process by fabricating periodic cubic and octet architectures with beam diameters of 115-170 um and unit cells of 0.65-1.14 mm. The resulting structures are comprised of >99wt% rutile TiO2, as confirmed by Energy-Dispersive Spectroscopy, Raman spectroscopy, and Transmission Electron Microscopy. This titania AM process offers a promising pathway to creating safe and efficient photocatalytic reactors for household water disinfection. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |