Hydrothermal-Freeze-Casting of Poly(amidoamine)-Modified Graphene Aerogels towards CO<sub>2</sub> Adsorption
This article presents novel poly(amidoamine) (PAMAM) dendrimer-modified with partially-reduced graphene oxide (rGO) aerogels, obtained using the combined solvothermal synthesis-freeze-casting approach. The properties of modified aerogels are investigated with varying synthesis conditions, such as de...
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doaj-ff9bfbcfc0e142aca0a35f69d7ca91cd2021-09-09T13:47:36ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672021-08-01229333933310.3390/ijms22179333Hydrothermal-Freeze-Casting of Poly(amidoamine)-Modified Graphene Aerogels towards CO<sub>2</sub> AdsorptionAlina Pruna0Alfonso Cárcel1Adolfo Benedito2Enrique Giménez3Instituto de Tecnología de Materiales, Universitat Politècnica de València (UPV), s/n Camino de Vera, 46022 Valencia, SpainInstituto de Tecnología de Materiales, Universitat Politècnica de València (UPV), s/n Camino de Vera, 46022 Valencia, SpainInstituto Tecnológico del Plástico (AIMPLAS), 4 Gustave Eiffel, Paterna, 46980 Valencia, SpainInstituto de Tecnología de Materiales, Universitat Politècnica de València (UPV), s/n Camino de Vera, 46022 Valencia, SpainThis article presents novel poly(amidoamine) (PAMAM) dendrimer-modified with partially-reduced graphene oxide (rGO) aerogels, obtained using the combined solvothermal synthesis-freeze-casting approach. The properties of modified aerogels are investigated with varying synthesis conditions, such as dendrimer generation (G), GO:PAMAM wt. ratio, solvothermal temperature, and freeze-casting rate. Scanning electron microscopy, Fourier Transform Infrared spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy are employed to characterize the aerogels. The results indicate a strong correlation of the synthesis conditions with N content, N/C ratio, and nitrogen contributions in the modified aerogels. Our results show that the best CO<sub>2</sub> adsorption performance was exhibited by the aerogels modified with higher generation (G7) dendrimer at low GO:PAMAM ratio as 2:0.1 mg mL<sup>−1</sup> and obtained at higher solvothermal temperature and freeze-casting in liquid nitrogen. The enclosed results are indicative of a viable approach to modify graphene aerogels towards improving the CO<sub>2</sub> capture.https://www.mdpi.com/1422-0067/22/17/9333dendrimergraphene oxidehydrothermal synthesisaerogeladsorption |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Alina Pruna Alfonso Cárcel Adolfo Benedito Enrique Giménez |
spellingShingle |
Alina Pruna Alfonso Cárcel Adolfo Benedito Enrique Giménez Hydrothermal-Freeze-Casting of Poly(amidoamine)-Modified Graphene Aerogels towards CO<sub>2</sub> Adsorption International Journal of Molecular Sciences dendrimer graphene oxide hydrothermal synthesis aerogel adsorption |
author_facet |
Alina Pruna Alfonso Cárcel Adolfo Benedito Enrique Giménez |
author_sort |
Alina Pruna |
title |
Hydrothermal-Freeze-Casting of Poly(amidoamine)-Modified Graphene Aerogels towards CO<sub>2</sub> Adsorption |
title_short |
Hydrothermal-Freeze-Casting of Poly(amidoamine)-Modified Graphene Aerogels towards CO<sub>2</sub> Adsorption |
title_full |
Hydrothermal-Freeze-Casting of Poly(amidoamine)-Modified Graphene Aerogels towards CO<sub>2</sub> Adsorption |
title_fullStr |
Hydrothermal-Freeze-Casting of Poly(amidoamine)-Modified Graphene Aerogels towards CO<sub>2</sub> Adsorption |
title_full_unstemmed |
Hydrothermal-Freeze-Casting of Poly(amidoamine)-Modified Graphene Aerogels towards CO<sub>2</sub> Adsorption |
title_sort |
hydrothermal-freeze-casting of poly(amidoamine)-modified graphene aerogels towards co<sub>2</sub> adsorption |
publisher |
MDPI AG |
series |
International Journal of Molecular Sciences |
issn |
1661-6596 1422-0067 |
publishDate |
2021-08-01 |
description |
This article presents novel poly(amidoamine) (PAMAM) dendrimer-modified with partially-reduced graphene oxide (rGO) aerogels, obtained using the combined solvothermal synthesis-freeze-casting approach. The properties of modified aerogels are investigated with varying synthesis conditions, such as dendrimer generation (G), GO:PAMAM wt. ratio, solvothermal temperature, and freeze-casting rate. Scanning electron microscopy, Fourier Transform Infrared spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy are employed to characterize the aerogels. The results indicate a strong correlation of the synthesis conditions with N content, N/C ratio, and nitrogen contributions in the modified aerogels. Our results show that the best CO<sub>2</sub> adsorption performance was exhibited by the aerogels modified with higher generation (G7) dendrimer at low GO:PAMAM ratio as 2:0.1 mg mL<sup>−1</sup> and obtained at higher solvothermal temperature and freeze-casting in liquid nitrogen. The enclosed results are indicative of a viable approach to modify graphene aerogels towards improving the CO<sub>2</sub> capture. |
topic |
dendrimer graphene oxide hydrothermal synthesis aerogel adsorption |
url |
https://www.mdpi.com/1422-0067/22/17/9333 |
work_keys_str_mv |
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