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Monitoring the Thiol/Thiophenol Molecule-Modulated Plasmon-Mediated Silver Oxidation with Dark-Field Optical Microscopy
Monitoring the Thiol/Thiophenol Molecule-Modulated Plasmon-Mediated Silver Oxidation with Dark-Field Optical Microscopy
- Source :
- Chemistry (Weinheim an der Bergstrasse, Germany). 28(2)
- Publication Year :
- 2021
-
Abstract
- Surface plasmon can trigger or accelerate many photochemical reactions, especially useful in energy and environmental industries. Recently, molecular adsorption has been proved effective in modulating the plasmon-mediated photochemistry, however the realized chemical reactions are limited and the mechanism behind is still unclear. Herein, by using in situ dark-field optical microscopy, the plasmon-mediated oxidative etching of silver nanoparticles (Ag NPs), a typical hot-hole-driven reaction, is monitored continuously and quantitatively. The presence of thiol or thiophenol molecules is found essential in the silver oxidation. In addition, the rate of silver oxidation is modulated by the choice of different thiol or thiophenol molecules. Compared with the molecules having electron donating groups, the ones having electron accepting groups accelerate the silver oxidation dramatically. The thiol/thiophenol modulation is attributed to the modulation of the charge separation between the Ag NPs and the adsorbed thiol or thiophenol molecules. This work demonstrates the great potential of molecular adsorption in modulating the plasmon-mediated photochemistry, which will pave a new way for developing highly efficient plasmonic photocatalysts.
Details
- ISSN :
- 15213765
- Volume :
- 28
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Chemistry (Weinheim an der Bergstrasse, Germany)
- Accession number :
- edsair.doi.dedup.....0d18c9de9f08c3affa3c6a3fd10ec6e3