Photoactive WS<sub>2</sub> nanosheets bearing plasmonic nanoparticles for visible light-driven reduction of nitrophenol

Lee, Hye Rim; Park, Jung Hyun; Raza, Faizan; Yim, DaBin; Jeon, Su Ji; Kim, Hye In; Bong, Ki Wan; Kim, Jong Ho

doi:10.1039/c6cc00708b

Cited by 34 publications

(32 citation statements)

References 19 publications

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“…Atomically thin, 2D forms of transition metal dichalcogenides (TMDs), including MoS 2 , WS 2 , MoSe 2 , and WSe 2 , have garnered considerable attention because of their compositions and structural‐configuration‐dependent physicochemical properties . In particular, the electronic structures of TMDs can be tuned by controlling the number of layers via exfoliation of their bulk counterparts, leading thin TMD nanosheets to be attractive candidates for a wide range of applications, including sensing, photocatalysis, optoelectronics, and energy storage and conversion . The common approaches for obtaining 2D TMD monolayers include mechanical exfoliation, chemical vapor deposition, and liquid‐phase exfoliation .…”

Section: Introductionmentioning

confidence: 99%

Adjustable Intermolecular Interactions Allowing 2D Transition Metal Dichalcogenides with Prolonged Scavenging Activity for Reactive Oxygen Species

Yim

Kim

et al. 2018

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There is an increasing demand for control over the dimensions and functions of transition metal dichalcogenides (TMDs) in aqueous solution toward biological and medical applications. Herein, an approach for the exfoliation and functionalization of TMDs in water via modulation of the hydrophobic interaction between poly(ε-caprolactone)-b-poly(ethylene glycol) (PCL-b-PEG) and the basal planes of TMDs is reported. Decreasing the hydrophobic PCL length of PCL-b-PEG from 5000 g mol (PCL ) to 460 g mol (PCL ) significantly increases the exfoliation efficiency of TMD nanosheets because the polymer-TMD hydrophobic interaction becomes dominant over the polymer-polymer interaction. The TMD nanosheets exfoliated by PCL -b-PEG (460-WS , 460-WSe , 460-MoS , and 460-MoSe ) show excellent and prolonged scavenging activity for reactive oxygen species (ROS), but each type of TMD displays a different scavenging tendency against hydroxyl, superoxide, and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) radicals. A mechanistic study based on electron paramagnetic resonance spectroscopy and density functional theory simulations suggests that radical-mediated oxidation of TMDs and hydrogen transfer from the oxidized TMDs to radicals are crucial steps for ROS scavenging by TMD nanosheets. As-prepared 460-TMDs are able to effectively scavenge ROS in HaCaT human keratinocytes, and also exhibit excellent biocompatibility.

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Section: Introductionmentioning

confidence: 99%

Adjustable Intermolecular Interactions Allowing 2D Transition Metal Dichalcogenides with Prolonged Scavenging Activity for Reactive Oxygen Species

Yim

Kim

et al. 2018

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“…The investigation of MoSe 2 with nanoplasmonic waveguide paves the way for practical on‐chip optical applications . Lee et al explored the influence of plasmonic nanoparticles on the photocatalytic activity of WS 2 . Additionally, the roughness of metal films, even when covered by dielectric films, can influence the optical performance of adhered 2D metal chalcogenides via plasmonic resonant coupling .…”

Section: Versatile Device Applicationsmentioning

confidence: 99%

Versatile Crystal Structures and (Opto)electronic Applications of the 2D Metal Mono‐, Di‐, and Tri‐Chalcogenide Nanosheets

Cui

Zhou

et al. 2019

Adv Funct Materials

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Emerging 2D metal chalcogenides present excellent performance for electronic and optoelectronic applications. In contrast to graphene and other 2D materials, 2D metal chalcogenides possess intrinsic bandgaps, versatile band structures, and superior atmospheric stability. The many categories of 2D metal chalcogenides ensure that they can be applied to various practical scenarios. 2D metal monochalcogenides, dichalcogenides, and trichalcogenides are the three main categories of these materials. They have distinct crystal structures resulting in different characteristics. Some basic device characteristics, such as the charge carrier characteristics, scattering mechanisms, interfacial contacts, and band alignments of heterojunctions, are vital factors for practical device applications that ensure that the desired properties can be achieved. Various electronic, optoelectronic, and photonic applications based on 2D metal chalcogenides have been extensively investigated. 2D metal chalcogenides are considered as competitive candidates for future electronic and optoelectronic applications.is advantageous for reducing the destruction from the surrounding environment during processing and storage and can effectively prolong the practical lifetime of materials. 2D metal chalcogenides have been extensively investigated for various applications, including electronics, optoelectronics, valleytronics, spintronics, superconductivity, thermoelectricity, and electrochemistry. [1b,5,9] 2D metal chalcogenides possess rich band structures with various bandgaps, which are a pivotal issue of modern electronic and optoelectronic applications. Some 2D metal chalcogenides with special quantum characteristics provide a versatile platform for investigating novel electronic and optoelectronic applications, such as the valleytronics applications of group VIB dichalcogenides. [10] In this review, we provide a comprehensive introduction to electronic, optoelectronic, and photonic applications for all 2D metal chalcogenides, including 2D metal mono-, di-, and tri-chalcogenides. Their different characteristics arising from the diverse crystal structures determine the potential applications in different fields. Some basic device characteristics, such as the charge carrier characteristics, scattering mechanisms, interfacial contacts, and band alignments of heterojunctions, are vital factors for optimizing the performance in practical applications. A bottomto-top overview based on recent studies of 2D metal chalcogenides, from the crystal structures and device characteristics to applications, is provided in the following sections.

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“…10). More specifically, TMDs have been widely used to catalyze reactions involving organic molecular systems 150,151,152 or the production of molecular hydrogen during electrocatalytic 153 or photocatalytic 154 water splitting processes. In fact, hydrogen is one of the most important clean and renewable energy vectors for future sustainability.…”

Section: (Photo-)catalysismentioning

confidence: 99%

Tailoring the physicochemical properties of solution-processed transition metal dichalcogenides via molecular approaches

2019

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Photoactive WS₂ nanosheets bearing plasmonic nanoparticles for visible light-driven reduction of nitrophenol

Abstract: Semiconducting WS2 nanohybrids with different sizes of silver nanoparticles are designed via amine-assisted in situ reduction and growth of Ag(+) ions. These nanohybrids exhibit characteristic photocatalytic activity for the reduction of 4-nitrophenol as a function of their structure.

Cited by 34 publications

References 19 publications

Adjustable Intermolecular Interactions Allowing 2D Transition Metal Dichalcogenides with Prolonged Scavenging Activity for Reactive Oxygen Species

Adjustable Intermolecular Interactions Allowing 2D Transition Metal Dichalcogenides with Prolonged Scavenging Activity for Reactive Oxygen Species

Versatile Crystal Structures and (Opto)electronic Applications of the 2D Metal Mono‐, Di‐, and Tri‐Chalcogenide Nanosheets

Tailoring the physicochemical properties of solution-processed transition metal dichalcogenides via molecular approaches

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Photoactive WS2 nanosheets bearing plasmonic nanoparticles for visible light-driven reduction of nitrophenol

Abstract: Semiconducting WS2 nanohybrids with different sizes of silver nanoparticles are designed via amine-assisted in situ reduction and growth of Ag(+) ions. These nanohybrids exhibit characteristic photocatalytic activity for the reduction of 4-nitrophenol as a function of their structure.

Cited by 34 publications

References 19 publications

Adjustable Intermolecular Interactions Allowing 2D Transition Metal Dichalcogenides with Prolonged Scavenging Activity for Reactive Oxygen Species

Adjustable Intermolecular Interactions Allowing 2D Transition Metal Dichalcogenides with Prolonged Scavenging Activity for Reactive Oxygen Species

Versatile Crystal Structures and (Opto)electronic Applications of the 2D Metal Mono‐, Di‐, and Tri‐Chalcogenide Nanosheets

Tailoring the physicochemical properties of solution-processed transition metal dichalcogenides via molecular approaches

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Photoactive WS₂ nanosheets bearing plasmonic nanoparticles for visible light-driven reduction of nitrophenol