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

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Nano Letters Pub Date : 2024-10-07 DOI:10.1021/acs.nanolett.4c03702

Swati J Patil, Dmitry Kurouski

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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 p,p'-dimercaptoazobisbenzene (DMAB) on tungsten disulfide (WS₂) nanoplates and WS₂ coupled with palladium nanoparticles (WS₂@PdNPs). Our results indicate that although both WS₂ and WS₂@Pd were capable of reducing 4-NTP into DMAB, the metallic hybrid demonstrated much greater yield and rates of DMAB formation compared to WS₂ nanoplate. These results indicate that coupling of catalytic metals to dichalcogenides could be used to enhance their catalytic properties.

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二硫化钨纳米板上钯增强光催化还原 4-硝基苯硫酚的纳米级成像。

二维二卤化物是一种具有独特物理和化学特性的现代纳米材料。这些材料在电磁波谱的红外和可见光区域具有带隙，可通过其分子组成进行调节。这种光-物质相互作用产生的激子能够催化二钴化物表面分子分析物的化学反应。然而，人们对这种纳米材料的光催化特性仍然知之甚少。在本研究中，我们利用尖端增强拉曼光谱（TERS）研究了二硫化钨（WS2）纳米板和二硫化钨与钯纳米颗粒（WS2@PdNPs）光催化还原 4-硝基苯硫酚（4-NTP）至 p,p'-二巯基偶氮苯（DMAB）的过程。我们的研究结果表明，虽然 WS2 和 WS2@Pd 都能将 4-NTP 还原成 DMAB，但与 WS2 纳米板相比，金属杂化物的 DMAB 生成量和生成速率要高得多。这些结果表明，可以利用催化金属与二卤化物的偶联来增强它们的催化性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.