TY - JOUR

T1 - Comparison of adsorbents containing carbon nanotubes for express pre-concentration of volatile organic compounds from the air flow

AU - Rodinkov, Oleg

AU - Postnov, Victor

AU - Spivakovskyi, Valery

AU - Vlasov, Andrey

AU - Bugaichenko, Alexandra

AU - Slastina, Svetlana

AU - Znamenskaya, Ekaterina

AU - Shilov, Roman

AU - Lanin, Sergey

AU - Nesterenko, Pavel

N1 - Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/4/14

Y1 - 2021/4/14

N2 - New composite adsorbents including silica supports (silica, aerosilogel, and diatomite) and carbon materials (multiwall carbon nanotubes and pyrolytic carbon) have been prepared and characterized. The analytical capabilities of the produced sorbents have been evaluated by their efficiency in the express pre-concentration of volatile organic compounds (butanol and phenols) from the air stream. The prepared surface-layered adsorbents containing multiwall carbon nanotubes placed onto the surface of aerosilogel by use of the carbon vapor deposition method with preloading cobalt nanostructures as a catalyst were found significantly more efficient than traditionally used graphitic carbon-based adsorbents Carbopacks B, C, and X. Additionally, a new adsorbent composed of diatomite Porochrome-3 support coated with a pyrocarbon layer was prepared. This low surface area composited adsorbent allowed both quantitative pre-concentration of phenol and isomeric cresols from the air and their thermal desorption. The developed adsorbents provided fast pre-concentration of selected phenols with a concentration factor of 2 × 103 in 5 min and were used for gas chromatographic determination of analytes in the air at low concentration levels starting from several µg/m3 with a flame ionization detector.

AB - New composite adsorbents including silica supports (silica, aerosilogel, and diatomite) and carbon materials (multiwall carbon nanotubes and pyrolytic carbon) have been prepared and characterized. The analytical capabilities of the produced sorbents have been evaluated by their efficiency in the express pre-concentration of volatile organic compounds (butanol and phenols) from the air stream. The prepared surface-layered adsorbents containing multiwall carbon nanotubes placed onto the surface of aerosilogel by use of the carbon vapor deposition method with preloading cobalt nanostructures as a catalyst were found significantly more efficient than traditionally used graphitic carbon-based adsorbents Carbopacks B, C, and X. Additionally, a new adsorbent composed of diatomite Porochrome-3 support coated with a pyrocarbon layer was prepared. This low surface area composited adsorbent allowed both quantitative pre-concentration of phenol and isomeric cresols from the air and their thermal desorption. The developed adsorbents provided fast pre-concentration of selected phenols with a concentration factor of 2 × 103 in 5 min and were used for gas chromatographic determination of analytes in the air at low concentration levels starting from several µg/m3 with a flame ionization detector.

KW - Adsorption

KW - Aerosilogel

KW - Air

KW - Alcohols

KW - Analysis

KW - Multiwall carbon nanotubes

KW - Phenols

KW - Pyrocarbon

KW - Sorbents

KW - Surface-layered adsorbents

KW - phenols

KW - multiwall carbon nanotubes

KW - adsorption

KW - sorbents

KW - aerosilogel

KW - SORBENTS

KW - alcohols

KW - air

KW - analysis

KW - surface-layered adsorbents

KW - pyrocarbon

UR - http://www.scopus.com/inward/record.url?scp=85105202220&partnerID=8YFLogxK

U2 - 10.3390/separations8040050

DO - 10.3390/separations8040050

M3 - Article

AN - SCOPUS:85105202220

VL - 8

JO - Separations

JF - Separations

SN - 2297-8739

IS - 4

M1 - 50

ER -