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Hydrophobic Modification of Sulfonated Carbon Aerogels from Coir Fibers To Enhance Their Catalytic Performance for Esterification
[Image: see text] The hydrophilicity of sulfonic acid-functionalized solid catalysts tends to accelerate the deactivation of the catalyst for chemical reactions where water is produced during the process. In this work, we proposed a hydrophobic carbon aerogel acid catalyst derived from coir fibers b...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2023
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10398682/ https://www.ncbi.nlm.nih.gov/pubmed/37546659 http://dx.doi.org/10.1021/acsomega.3c02244 |
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author | Suryandari, Ade Sonya Nurtono, Tantular Widiyastuti, Widiyastuti Setyawan, Heru |
author_facet | Suryandari, Ade Sonya Nurtono, Tantular Widiyastuti, Widiyastuti Setyawan, Heru |
author_sort | Suryandari, Ade Sonya |
collection | PubMed |
description | [Image: see text] The hydrophilicity of sulfonic acid-functionalized solid catalysts tends to accelerate the deactivation of the catalyst for chemical reactions where water is produced during the process. In this work, we proposed a hydrophobic carbon aerogel acid catalyst derived from coir fibers by a sulfonation-hydrophobization route via the diazo reduction method. Sulfonation using the diazo reduction method offers some advantages such as the process takes only a few minutes and the modified surface can be easily modified further to be hydrophobic. The carbon aerogel was produced by direct pyrolysis of cellulose aerogels derived from coir fibers using an NH(4)OH–urea method and then sulfonated and hydrophobized using sulfanilic acid and 4-tert-butylaniline (TBA), respectively. The carbon aerogel exhibited a very high surface area (2624.93–3911.05 m(2) g(–1)), which provides a lot of number of sites for sulfonate groups (2.30–2.70 mmol g(–1)). The water contact angle of the sulfonated catalyst after hydrophobization ranged from 70 to 115°, depending on the mass ratio of the TBA-to-solid catalyst. The hydrophobic catalyst exhibited better catalytic performance toward esterification of acetic acid with ethanol. A conversion of 65–74% could be achieved in a brief time using the hydrophobic catalyst. The conversions were much higher than that obtained by the unmodified hydrophilic catalyst. Our study offers a strategy to tune the surface hydrophobicity of the sulfonated solid acid catalyst to match for specific chemical reactions. |
format | Online Article Text |
id | pubmed-10398682 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-103986822023-08-04 Hydrophobic Modification of Sulfonated Carbon Aerogels from Coir Fibers To Enhance Their Catalytic Performance for Esterification Suryandari, Ade Sonya Nurtono, Tantular Widiyastuti, Widiyastuti Setyawan, Heru ACS Omega [Image: see text] The hydrophilicity of sulfonic acid-functionalized solid catalysts tends to accelerate the deactivation of the catalyst for chemical reactions where water is produced during the process. In this work, we proposed a hydrophobic carbon aerogel acid catalyst derived from coir fibers by a sulfonation-hydrophobization route via the diazo reduction method. Sulfonation using the diazo reduction method offers some advantages such as the process takes only a few minutes and the modified surface can be easily modified further to be hydrophobic. The carbon aerogel was produced by direct pyrolysis of cellulose aerogels derived from coir fibers using an NH(4)OH–urea method and then sulfonated and hydrophobized using sulfanilic acid and 4-tert-butylaniline (TBA), respectively. The carbon aerogel exhibited a very high surface area (2624.93–3911.05 m(2) g(–1)), which provides a lot of number of sites for sulfonate groups (2.30–2.70 mmol g(–1)). The water contact angle of the sulfonated catalyst after hydrophobization ranged from 70 to 115°, depending on the mass ratio of the TBA-to-solid catalyst. The hydrophobic catalyst exhibited better catalytic performance toward esterification of acetic acid with ethanol. A conversion of 65–74% could be achieved in a brief time using the hydrophobic catalyst. The conversions were much higher than that obtained by the unmodified hydrophilic catalyst. Our study offers a strategy to tune the surface hydrophobicity of the sulfonated solid acid catalyst to match for specific chemical reactions. American Chemical Society 2023-07-24 /pmc/articles/PMC10398682/ /pubmed/37546659 http://dx.doi.org/10.1021/acsomega.3c02244 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Suryandari, Ade Sonya Nurtono, Tantular Widiyastuti, Widiyastuti Setyawan, Heru Hydrophobic Modification of Sulfonated Carbon Aerogels from Coir Fibers To Enhance Their Catalytic Performance for Esterification |
title | Hydrophobic Modification
of Sulfonated Carbon Aerogels
from Coir Fibers To Enhance Their Catalytic Performance for Esterification |
title_full | Hydrophobic Modification
of Sulfonated Carbon Aerogels
from Coir Fibers To Enhance Their Catalytic Performance for Esterification |
title_fullStr | Hydrophobic Modification
of Sulfonated Carbon Aerogels
from Coir Fibers To Enhance Their Catalytic Performance for Esterification |
title_full_unstemmed | Hydrophobic Modification
of Sulfonated Carbon Aerogels
from Coir Fibers To Enhance Their Catalytic Performance for Esterification |
title_short | Hydrophobic Modification
of Sulfonated Carbon Aerogels
from Coir Fibers To Enhance Their Catalytic Performance for Esterification |
title_sort | hydrophobic modification
of sulfonated carbon aerogels
from coir fibers to enhance their catalytic performance for esterification |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10398682/ https://www.ncbi.nlm.nih.gov/pubmed/37546659 http://dx.doi.org/10.1021/acsomega.3c02244 |
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