In situ studies on free-standing synthesis of nanocatalysts via acoustic levitation coupled with pulsed laser irradiation
Acoustic levitation is a distinctive and versatile tool for levitating and processing free-standing single droplets and particles. Liquid droplets suspended in an acoustic standing wave provide container-free environments for understanding chemical reactions by avoiding boundary effects and solid su...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Ultrasonics Sonochemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1350417723000573 |
| _version_ | 1797867677812785152 |
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| author | Juhyeon Park Ahreum Min Jayaraman Theerthagiri Muthupandian Ashokkumar Myong Yong Choi |
| author_facet | Juhyeon Park Ahreum Min Jayaraman Theerthagiri Muthupandian Ashokkumar Myong Yong Choi |
| author_sort | Juhyeon Park |
| collection | DOAJ |
| description | Acoustic levitation is a distinctive and versatile tool for levitating and processing free-standing single droplets and particles. Liquid droplets suspended in an acoustic standing wave provide container-free environments for understanding chemical reactions by avoiding boundary effects and solid surfaces. We attempted to use this strategy for the production of well-dispersed uniform catalytic nanomaterials in an ultraclean confined area without the addition of external reducing agents or surfactants. In this study, we report on the synthesis of gold and silver nanoparticles (NPs) via acoustic levitation coupled with pulsed laser irradiation (PLI). In situ UV–Visible and Raman spectroscopic techniques were performed to monitor the formation and growth of gold and silver NPs. The PLI was used for the photoreduction of targeted metal ions present in the levitated droplets to generate metal NPs. Additionally, the cavitation effect and bubble movement accelerate the nucleation and decrease the size of NPs. The synthesized Au NPs with ∼ 5 nm size showed excellent catalytic behavior towards the conversion of 4-nitrophenol to 4-aminophenol. This study may open a new door for synthesizing various functional nanocatalysts and for achieving new chemical reactions in suspended droplets. |
| first_indexed | 2024-04-09T23:43:58Z |
| format | Article |
| id | doaj.art-a2ab1387ae124f439ca4973ed1ac9268 |
| institution | Directory Open Access Journal |
| issn | 1350-4177 |
| language | English |
| last_indexed | 2024-04-09T23:43:58Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ultrasonics Sonochemistry |
| spelling | doaj.art-a2ab1387ae124f439ca4973ed1ac92682023-03-18T04:40:38ZengElsevierUltrasonics Sonochemistry1350-41772023-03-0194106345In situ studies on free-standing synthesis of nanocatalysts via acoustic levitation coupled with pulsed laser irradiationJuhyeon Park0Ahreum Min1Jayaraman Theerthagiri2Muthupandian Ashokkumar3Myong Yong Choi4Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of KoreaCore-Facility Center for Photochemistry & Nanomaterials, Gyeongsang National University, Jinju 52828, Republic of KoreaDepartment of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of KoreaSchool of Chemistry, University of Melbourne, Parkville Campus, Melbourne, VIC 3010, Australia; Corresponding authors at: Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of Korea (M.Y. Choi).Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of Korea; Core-Facility Center for Photochemistry & Nanomaterials, Gyeongsang National University, Jinju 52828, Republic of Korea; Corresponding authors at: Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of Korea (M.Y. Choi).Acoustic levitation is a distinctive and versatile tool for levitating and processing free-standing single droplets and particles. Liquid droplets suspended in an acoustic standing wave provide container-free environments for understanding chemical reactions by avoiding boundary effects and solid surfaces. We attempted to use this strategy for the production of well-dispersed uniform catalytic nanomaterials in an ultraclean confined area without the addition of external reducing agents or surfactants. In this study, we report on the synthesis of gold and silver nanoparticles (NPs) via acoustic levitation coupled with pulsed laser irradiation (PLI). In situ UV–Visible and Raman spectroscopic techniques were performed to monitor the formation and growth of gold and silver NPs. The PLI was used for the photoreduction of targeted metal ions present in the levitated droplets to generate metal NPs. Additionally, the cavitation effect and bubble movement accelerate the nucleation and decrease the size of NPs. The synthesized Au NPs with ∼ 5 nm size showed excellent catalytic behavior towards the conversion of 4-nitrophenol to 4-aminophenol. This study may open a new door for synthesizing various functional nanocatalysts and for achieving new chemical reactions in suspended droplets.http://www.sciencedirect.com/science/article/pii/S1350417723000573Acoustic levitationGold and silver nanoparticlesIn situ spectroscopy4-nitrophenol reductionPulsed laser irradiation |
| spellingShingle | Juhyeon Park Ahreum Min Jayaraman Theerthagiri Muthupandian Ashokkumar Myong Yong Choi In situ studies on free-standing synthesis of nanocatalysts via acoustic levitation coupled with pulsed laser irradiation Ultrasonics Sonochemistry Acoustic levitation Gold and silver nanoparticles In situ spectroscopy 4-nitrophenol reduction Pulsed laser irradiation |
| title | In situ studies on free-standing synthesis of nanocatalysts via acoustic levitation coupled with pulsed laser irradiation |
| title_full | In situ studies on free-standing synthesis of nanocatalysts via acoustic levitation coupled with pulsed laser irradiation |
| title_fullStr | In situ studies on free-standing synthesis of nanocatalysts via acoustic levitation coupled with pulsed laser irradiation |
| title_full_unstemmed | In situ studies on free-standing synthesis of nanocatalysts via acoustic levitation coupled with pulsed laser irradiation |
| title_short | In situ studies on free-standing synthesis of nanocatalysts via acoustic levitation coupled with pulsed laser irradiation |
| title_sort | in situ studies on free standing synthesis of nanocatalysts via acoustic levitation coupled with pulsed laser irradiation |
| topic | Acoustic levitation Gold and silver nanoparticles In situ spectroscopy 4-nitrophenol reduction Pulsed laser irradiation |
| url | http://www.sciencedirect.com/science/article/pii/S1350417723000573 |
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