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dc.contributor.author
Floyd, Evan L.
dc.contributor.author
Oh, Jonghwa
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Sapag, Manuel Karim
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Oni, Toluwanimi M.
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Shedd, Jacob S.
dc.contributor.author
Lungu, Claudiu T.
dc.date.available
2023-09-11T11:15:06Z
dc.date.issued
2022-02
dc.identifier.citation
Floyd, Evan L.; Oh, Jonghwa; Sapag, Manuel Karim; Oni, Toluwanimi M.; Shedd, Jacob S.; et al.; Photothermal Desorption of Toluene from Carbonaceous Substrates Using Light Flash; MDPI; Nanomaterials; 12; 4; 2-2022; 1-16
dc.identifier.issn
2079-4991
dc.identifier.uri
http://hdl.handle.net/11336/211040
dc.description.abstract
Millions of workers are occupationally exposed to volatile organic compounds (VOCs) annually. Current exposure assessment techniques primarily utilize sorbent based preconcentrators to collect VOCs, with analysis performed using chemical or thermal desorption. Chemical desorption typically analyzes 1 µL out of a 1 mL (0.1%) extraction volume providing limited sensitivity. Thermal desorption typically analyzes 100% of the sample which provides maximal sensitivity, but does not allow repeat analysis of the sample and often has greater sensitivity than is needed. In this study we describe a novel photothermal desorption (PTD) technique to bridge the sensitivity gap between chemical desorption and thermal desorption. We used PTD to partially desorb toluene from three carbonaceous substrates; activated carbon powder (AC-p), single-walled carbon nanotube (SWNT) powder (SWNT-p) and SWNT felts (SWNT-f). Sorbents were loaded with 435 ug toluene vapour and irradiated at four light energies. Desorption ranged from <0.007% to 0.86% with a single flash depending on substrate and flash energy. PTD was significantly greater and more consistent in SWNT-f substrates compared to AC-p or SWNT-p at all irradiation energies. We attribute the better performance of SWNT-f to greater utilization of its unique nanomaterials properties: high thermal conductivity along the nanotube axis, and greater interconnection within the felt matrix compared to the powdered form.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
MDPI
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
CARBON NANOTUBES
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CARBONACEOUS SUBSTRATES
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PHOTOTHERMAL DESORPTION
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THERMAL DESORPTION
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TOLUENE
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Otras Ciencias Químicas
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Ciencias Químicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Photothermal Desorption of Toluene from Carbonaceous Substrates Using Light Flash
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-07-07T20:27:51Z
dc.journal.volume
12
dc.journal.number
4
dc.journal.pagination
1-16
dc.journal.pais
Suiza
dc.description.fil
Fil: Floyd, Evan L.. University of Alabama at Birmingahm; Estados Unidos
dc.description.fil
Fil: Oh, Jonghwa. University of Alabama at Birmingahm; Estados Unidos
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Fil: Sapag, Manuel Karim. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich". Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich"; Argentina
dc.description.fil
Fil: Oni, Toluwanimi M.. University of Alabama at Birmingahm; Estados Unidos
dc.description.fil
Fil: Shedd, Jacob S.. University of Alabama at Birmingahm; Estados Unidos
dc.description.fil
Fil: Lungu, Claudiu T.. University of Alabama at Birmingahm; Estados Unidos
dc.journal.title
Nanomaterials
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.3390/nano12040662
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