| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Advanced Ceramics for Environmental Remediation
|
| Presentation Title |
Utilizing Band Diagrams to Engineer the Performance of Photocatalytic Processes |
| Author(s) |
Kirk Bevan, Botong Miao, Asif Iqbal |
| On-Site Speaker (Planned) |
Kirk Bevan |
| Abstract Scope |
In this talk we present an overview of the crucial role that semiconductor band diagrams can play in understanding and engineering photocatalytic systems. Focusing on the photo-anode, we begin by exploring how the operation of semiconductor/oxide based photocatalytic devices can be understood in a similar framework to solid-state Schottky diodes. From this it is then demonstrated how photocatalysis operates as a competition between recombination and reaction processes. We shall then briefly explore how this modeling approach can be utilized to understand the operation of photocatalytic devices. We will consider a recent case study, combining both theory and experiment, regarding the impact of surface oxidation on the interfacial operation of tantalum nitride photoanodes. Finally, we close by discussing how these insights can be applied towards engineering environmental chemistry associated applications. |