Photodegradation of methyl thioglycolate particles as a proxy for organosulphur containing droplets

Understanding the formation and transformation of sulphur-rich particles is of prime importance since they contribute to the global atmospheric sulphur budget. In this work, we performed a series of experiments on a photoactive organosulphur compound namely, methyl thioglycolate, as a model of an or...

Full description

Saved in:
Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2018, Vol.2 (29), p.19416-19423
Main Authors: Seng, Samantha, Picone, A. Lorena, Bava, Yanina B, Juncal, Luciana C, Moreau, Myriam, Ciuraru, Raluca, George, Christian, Romano, Rosana M, Sobanska, Sophie, Tobon, Yeny A
Format: Article
Language:English
Subjects:
Catalysis
Chemical Sciences
Droplets
Environment and Society
Environmental Sciences
Organosulfur compounds
Oxidation
Photodegradation
Sulfur
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Understanding the formation and transformation of sulphur-rich particles is of prime importance since they contribute to the global atmospheric sulphur budget. In this work, we performed a series of experiments on a photoactive organosulphur compound namely, methyl thioglycolate, as a model of an organosulphur species of marine origin. By investigating the photoproducts within levitated droplets, we showed that elemental sulphur (α-S 8 ) and sulphate (SO 4 2− ) can be photochemically generated at the gas-liquid interface by heterogeneous interaction with gaseous O 2 and H 2 O. These results demonstrate that the surface of levitated droplets facilitate the oxidation of methyl thioglycolate in the dark, while illumination is necessary to produce the oxidation in bulk experiments. Photochemical generation of elemental sulphur and sulphate at the gas-liquid interface by heterogeneous interaction with gaseous O 2 and H 2 O.
ISSN:1463-9076
1463-9084
DOI:10.1039/c7cp08658j