(222d) Plasmonic Purification: Visible-Light-Driven Generation of Reactive Oxygen Species for Water Disinfection
- Conference: AIChE Annual Meeting
- Year: 2017
- Proceeding: 2017 Annual Meeting
- Group: Topical Conference: Nanomaterials for Applications in Energy and Biology
- Time: Monday, October 30, 2017 - 4:21pm-4:43pm
Here we report on the fabrication and characterization of a plasmonic photocatalyst for visible-light-driven ROS generation. Our plasmonic photocatalyst is a broadband absorber capturing 90 % of the solar spectrum centered around 600 nm. We test its ability to generate ROS in a custom-built continuous flow microreactor allowing rapid real-time measurements of H2O2 generation. Under UV filtered AM1.5G illumination our photo-microreactor generates ~5 Î¼M H2O2 per minute. We will discuss the performance and stability of our plasmonic photocatalyst and propose a reaction pathway for visible-light-driven ROS generation. The effects of photocatalyst geometry, residence time in the photo-microreactor and excitation spectrum will also be discussed.
1) World Health Organization. 2012. Progress on Drinking Water and Sanitation. Geneva, Switzerland: WHO Press.