Facile Sonication Synthesis of WS2 Quantum Dots for Photoelectrochemical Performance

Facile Sonication Synthesis of WS2 Quantum Dots for Photoelectrochemical Performance

Two-dimensional transition metal dichalcogenides, such as tungsten disulfide (WS2), have been actively studied as suitable candidates for photocatalysts due to their unique structural and electronic properties. The presence of active sites at the edges and the higher specific surface area of these m...

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Main Authors: Liyan Zhou, Shancheng Yan, Han Wu, Haizeng Song, Yi Shi
Format: Article
Language:English
Published: MDPI AG 2017-01-01
Series:Catalysts
Subjects:
tungsten disulfide
quantum dots
sonication
photocatalysis
Online Access:http://www.mdpi.com/2073-4344/7/1/18
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spelling doaj-eb7f8f95bf394b958e26f95de077f6162020-11-24T23:15:35ZengMDPI AGCatalysts2073-43442017-01-01711810.3390/catal7010018catal7010018Facile Sonication Synthesis of WS2 Quantum Dots for Photoelectrochemical PerformanceLiyan Zhou0Shancheng Yan1Han Wu2Haizeng Song3Yi Shi4National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, ChinaSchool of Geography and Biological Information, Nanjing University of Posts and Telecommunications, Nanjing 210023, ChinaNational Laboratory of Solid State Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, ChinaSchool of Geography and Biological Information, Nanjing University of Posts and Telecommunications, Nanjing 210023, ChinaNational Laboratory of Solid State Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, ChinaTwo-dimensional transition metal dichalcogenides, such as tungsten disulfide (WS2), have been actively studied as suitable candidates for photocatalysts due to their unique structural and electronic properties. The presence of active sites at the edges and the higher specific surface area of these materials are crucial to the photocatalytic activity of the hydrogen evolution reaction. Here, WS2 quantum dots (QDs) have been successfully synthesized by using a combination of grinding and sonication techniques. The morphology of the QDs was observed, using transmission electron microscopy and an atomic force microscope, to have uniform sizes of less than 5 nm. Photoelectrochemical (PEC) measurements show that the current density of WS2 QDs under illumination is almost two times higher than that of pristine WS2. Furthermore, these high-quality WS2 QDs may have various applications in optoelectronics, solar cells, and biomedicine.http://www.mdpi.com/2073-4344/7/1/18tungsten disulfidequantum dotssonicationphotocatalysis
collection DOAJ
language English
format Article
sources DOAJ
author Liyan Zhou
Shancheng Yan
Han Wu
Haizeng Song
Yi Shi
spellingShingle Liyan Zhou
Shancheng Yan
Han Wu
Haizeng Song
Yi Shi
Facile Sonication Synthesis of WS2 Quantum Dots for Photoelectrochemical Performance
Catalysts
tungsten disulfide
quantum dots
sonication
photocatalysis
author_facet Liyan Zhou
Shancheng Yan
Han Wu
Haizeng Song
Yi Shi
author_sort Liyan Zhou
title Facile Sonication Synthesis of WS2 Quantum Dots for Photoelectrochemical Performance
title_short Facile Sonication Synthesis of WS2 Quantum Dots for Photoelectrochemical Performance
title_full Facile Sonication Synthesis of WS2 Quantum Dots for Photoelectrochemical Performance
title_fullStr Facile Sonication Synthesis of WS2 Quantum Dots for Photoelectrochemical Performance
title_full_unstemmed Facile Sonication Synthesis of WS2 Quantum Dots for Photoelectrochemical Performance
title_sort facile sonication synthesis of ws2 quantum dots for photoelectrochemical performance
publisher MDPI AG
series Catalysts
issn 2073-4344
publishDate 2017-01-01
description Two-dimensional transition metal dichalcogenides, such as tungsten disulfide (WS2), have been actively studied as suitable candidates for photocatalysts due to their unique structural and electronic properties. The presence of active sites at the edges and the higher specific surface area of these materials are crucial to the photocatalytic activity of the hydrogen evolution reaction. Here, WS2 quantum dots (QDs) have been successfully synthesized by using a combination of grinding and sonication techniques. The morphology of the QDs was observed, using transmission electron microscopy and an atomic force microscope, to have uniform sizes of less than 5 nm. Photoelectrochemical (PEC) measurements show that the current density of WS2 QDs under illumination is almost two times higher than that of pristine WS2. Furthermore, these high-quality WS2 QDs may have various applications in optoelectronics, solar cells, and biomedicine.
topic tungsten disulfide
quantum dots
sonication
photocatalysis
url http://www.mdpi.com/2073-4344/7/1/18
work_keys_str_mv AT liyanzhou facilesonicationsynthesisofws2quantumdotsforphotoelectrochemicalperformance
AT shanchengyan facilesonicationsynthesisofws2quantumdotsforphotoelectrochemicalperformance
AT hanwu facilesonicationsynthesisofws2quantumdotsforphotoelectrochemicalperformance
AT haizengsong facilesonicationsynthesisofws2quantumdotsforphotoelectrochemicalperformance
AT yishi facilesonicationsynthesisofws2quantumdotsforphotoelectrochemicalperformance
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