Visible Light-Induced Reactivity of Plasmonic Gold Nanoparticles Incorporated into TiO<sub>2</sub> Matrix towards 2-Chloroethyl Ethyl Sulfide

Visible Light-Induced Reactivity of Plasmonic Gold Nanoparticles Incorporated into TiO<sub>2</sub> Matrix towards 2-Chloroethyl Ethyl Sulfide

Inexpensive strategies for efficient decontamination of hazardous chemicals are required. In this study, the effect of visible light (λ > 400 nm) on the decomposition of 2-chloroethyl ethyl sulfide (2-CEES, a sulfur mustard (HD) simulant) on Au/TiO<sub>2</sub> photocatalyst under anae...

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Main Authors: Wesley Gordon, Alex Balboa, Spencer Giles, Albert Epshteyn, Oscar Ávalos-Ovando, Alexander Govorov, Monica McEntee, Olga Baturina
Format: Article
Language:English
Published: MDPI AG 2021-06-01
Series:Crystals
Subjects:
plasmonic gold nanoparticles
2-chloroethyl ethyl sulfide
photocatalysis
in situ DRIFTS
Online Access:https://www.mdpi.com/2073-4352/11/6/659
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spelling doaj-b7702889820f4ddba98e31e2e656ce3b2021-06-30T23:47:30ZengMDPI AGCrystals2073-43522021-06-011165965910.3390/cryst11060659Visible Light-Induced Reactivity of Plasmonic Gold Nanoparticles Incorporated into TiO<sub>2</sub> Matrix towards 2-Chloroethyl Ethyl SulfideWesley Gordon0Alex Balboa1Spencer Giles2Albert Epshteyn3Oscar Ávalos-Ovando4Alexander Govorov5Monica McEntee6Olga Baturina7U.S. Army DEVCOM Chemical Biological Center, Aberdeen Proving Ground, Aberdeen, MD 21010, USAU.S. Army DEVCOM Chemical Biological Center, Aberdeen Proving Ground, Aberdeen, MD 21010, USAChemistry Division, Naval Research Laboratory, Washington, DC 20375, USAChemistry Division, Naval Research Laboratory, Washington, DC 20375, USADepartment of Physics and Astronomy, Ohio University, Athens, OH 45701, USADepartment of Physics and Astronomy, Ohio University, Athens, OH 45701, USAU.S. Army DEVCOM Chemical Biological Center, Aberdeen Proving Ground, Aberdeen, MD 21010, USAChemistry Division, Naval Research Laboratory, Washington, DC 20375, USAInexpensive strategies for efficient decontamination of hazardous chemicals are required. In this study, the effect of visible light (λ > 400 nm) on the decomposition of 2-chloroethyl ethyl sulfide (2-CEES, a sulfur mustard (HD) simulant) on Au/TiO<sub>2</sub> photocatalyst under anaerobic and aerobic conditions has been investigated in situ by diffuse reflectance infrared Fourier –transformed spectroscopy (DRIFTS). Under anaerobic conditions, 2-CEES partially desorbs from the Au/TiO<sub>2</sub> surface likely due to the photothermal effect, induced by photo-excited plasmonic Au nanoparticles. In the aerobic experiment, no visible light effect is observed. We attribute this behavior to 2-CEES consumption by hydrolysis to 2-ethylthio ethanol in the dark, prior to visible light excitation. Oxygen activates water molecules in the dark, resulting in accelerated 2-CEES hydrolysis.https://www.mdpi.com/2073-4352/11/6/659plasmonic gold nanoparticles2-chloroethyl ethyl sulfidephotocatalysisin situ DRIFTS
collection DOAJ
language English
format Article
sources DOAJ
author Wesley Gordon
Alex Balboa
Spencer Giles
Albert Epshteyn
Oscar Ávalos-Ovando
Alexander Govorov
Monica McEntee
Olga Baturina
spellingShingle Wesley Gordon
Alex Balboa
Spencer Giles
Albert Epshteyn
Oscar Ávalos-Ovando
Alexander Govorov
Monica McEntee
Olga Baturina
Visible Light-Induced Reactivity of Plasmonic Gold Nanoparticles Incorporated into TiO<sub>2</sub> Matrix towards 2-Chloroethyl Ethyl Sulfide
Crystals
plasmonic gold nanoparticles
2-chloroethyl ethyl sulfide
photocatalysis
in situ DRIFTS
author_facet Wesley Gordon
Alex Balboa
Spencer Giles
Albert Epshteyn
Oscar Ávalos-Ovando
Alexander Govorov
Monica McEntee
Olga Baturina
author_sort Wesley Gordon
title Visible Light-Induced Reactivity of Plasmonic Gold Nanoparticles Incorporated into TiO<sub>2</sub> Matrix towards 2-Chloroethyl Ethyl Sulfide
title_short Visible Light-Induced Reactivity of Plasmonic Gold Nanoparticles Incorporated into TiO<sub>2</sub> Matrix towards 2-Chloroethyl Ethyl Sulfide
title_full Visible Light-Induced Reactivity of Plasmonic Gold Nanoparticles Incorporated into TiO<sub>2</sub> Matrix towards 2-Chloroethyl Ethyl Sulfide
title_fullStr Visible Light-Induced Reactivity of Plasmonic Gold Nanoparticles Incorporated into TiO<sub>2</sub> Matrix towards 2-Chloroethyl Ethyl Sulfide
title_full_unstemmed Visible Light-Induced Reactivity of Plasmonic Gold Nanoparticles Incorporated into TiO<sub>2</sub> Matrix towards 2-Chloroethyl Ethyl Sulfide
title_sort visible light-induced reactivity of plasmonic gold nanoparticles incorporated into tio<sub>2</sub> matrix towards 2-chloroethyl ethyl sulfide
publisher MDPI AG
series Crystals
issn 2073-4352
publishDate 2021-06-01
description Inexpensive strategies for efficient decontamination of hazardous chemicals are required. In this study, the effect of visible light (λ > 400 nm) on the decomposition of 2-chloroethyl ethyl sulfide (2-CEES, a sulfur mustard (HD) simulant) on Au/TiO<sub>2</sub> photocatalyst under anaerobic and aerobic conditions has been investigated in situ by diffuse reflectance infrared Fourier –transformed spectroscopy (DRIFTS). Under anaerobic conditions, 2-CEES partially desorbs from the Au/TiO<sub>2</sub> surface likely due to the photothermal effect, induced by photo-excited plasmonic Au nanoparticles. In the aerobic experiment, no visible light effect is observed. We attribute this behavior to 2-CEES consumption by hydrolysis to 2-ethylthio ethanol in the dark, prior to visible light excitation. Oxygen activates water molecules in the dark, resulting in accelerated 2-CEES hydrolysis.
topic plasmonic gold nanoparticles
2-chloroethyl ethyl sulfide
photocatalysis
in situ DRIFTS
url https://www.mdpi.com/2073-4352/11/6/659
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