Nanoscale Imaging of Palladium-Enhanced Photocatalytic Reduction of 4-Nitrothiophenol on Tungsten Disulfide Nanoplates

Overview

Journal Nano Lett

Publisher American Chemical Society

Specialty Biotechnology

Date 2024 Oct 7

PMID 39373895

Authors

Swati J Patil

Dmitry Kurouski

Affiliations

Soon will be listed here.

Abstract

Two-dimensional (2D) dichalcogenides are modern nanomaterials with unique physical and chemical properties. These materials possess band gaps in the infrared and visible regions of the electromagnetic spectrum that can be tuned by their molecular composition. Excitons generated as a result of such light-matter interactions are capable of catalyzing chemical reactions in molecular analytes present on the dichalcogenide surfaces. However, the photocatalytic properties of such nanomaterials remain poorly understood. In the current study, we utilize tip-enhanced Raman spectroscopy (TERS) to examine photocatalytic reduction of 4-nitrothiophenol (4-NTP) to '-dimercaptoazobisbenzene (DMAB) on tungsten disulfide (WS) nanoplates and WS coupled with palladium nanoparticles (WS@PdNPs). Our results indicate that although both WS and WS@Pd were capable of reducing 4-NTP into DMAB, the metallic hybrid demonstrated much greater yield and rates of DMAB formation compared to WS nanoplate. These results indicate that coupling of catalytic metals to dichalcogenides could be used to enhance their catalytic properties.

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