Non‐OH‐driven liquid‐phase chemistry in water microdroplets
Abstract
Water microdroplets containing organic and fluorinated compounds, such as formate, perfluorooctanoic acid (PFOA) and triflic acid, were exposed to a radiofrequency glow discharge plasma with a droplet residence time on the order of milliseconds. Triflic acid remained unaffected by any plasma condition while >75% decomposition of formate and PFOA could be achieved. In situ hydroxyl (OH)‐laser‐induced fluorescence measurements near the droplets confirmed that the conversion was independent of the OH flux to the droplet. A series of control experiments suggest that the contribution of vacuum UV photons in such decomposition of aqueous compounds can be significant for He and He + 17% Ar plasmas and can also explain unexpected decomposition trends as a function of droplet residence time in the plasma.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 13, 2023
- Source ID
- 10.1002/ppap.202200222
Entities
People
- Diana Aranzales
- Gaurav Nayak
- Jianan Wang
- Peter J Bruggeman
- Rui Li
- Selma Mededovic Thagard
Organizations
- Army Research Office
- Clarkson University
- United States Department of Energy
- University of Minnesota