A Study of the Adsorption Properties of Single Walled Carbon Nanotubes Treated with Nitric Acid
The changes observed in the properties of Single Walled Carbon Nanotubes (SWCNTs) after treatment with nitric acid are reported. The oxidized nanotube samples were characterized morphologically by scanning electron microscopy and structurally by Raman spectroscopy, thermogravimetric analysis, infrar...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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SAGE Publications
2011-07-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263-6174.29.7.705 |
| _version_ | 1797282005431353344 |
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| author | Andrés A. García Blanco Jhonny Villarroel Rocha John F. Múnera Marcelo Nazzarro Giorgio Zgrablich Karim Sapag |
| author_facet | Andrés A. García Blanco Jhonny Villarroel Rocha John F. Múnera Marcelo Nazzarro Giorgio Zgrablich Karim Sapag |
| author_sort | Andrés A. García Blanco |
| collection | DOAJ |
| description | The changes observed in the properties of Single Walled Carbon Nanotubes (SWCNTs) after treatment with nitric acid are reported. The oxidized nanotube samples were characterized morphologically by scanning electron microscopy and structurally by Raman spectroscopy, thermogravimetric analysis, infrared spectroscopy and X-ray photoelectron spectroscopy. Gas adsorption was used to study the changes in the surface properties of the samples (including the changes in their porosity), as well as the changes in the adsorbate–adsorbent interactions which occurred as a result of the acid treatment. The adsorption studies were conducted using nitrogen at 77 K and CO 2 at different temperatures between 263 K and 289 K at sub-atmospheric pressures. The isosteric heat was calculated from the data obtained and indicated a higher adsorbate–adsorbent interaction for the oxidized materials. A correlation was found between morphological and structural evolution and the adsorption properties of CO 2 , a probe gas which appears to be very suitable for characterizing the microporosity of these kinds of materials. |
| first_indexed | 2024-03-07T17:04:41Z |
| format | Article |
| id | doaj.art-3a77cae782d64abdb5ff8aeb5ae70563 |
| institution | Directory Open Access Journal |
| issn | 0263-6174 2048-4038 |
| language | English |
| last_indexed | 2024-03-07T17:04:41Z |
| publishDate | 2011-07-01 |
| publisher | SAGE Publications |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj.art-3a77cae782d64abdb5ff8aeb5ae705632024-03-03T02:41:57ZengSAGE PublicationsAdsorption Science & Technology0263-61742048-40382011-07-012910.1260/0263-6174.29.7.705A Study of the Adsorption Properties of Single Walled Carbon Nanotubes Treated with Nitric AcidAndrés A. García Blanco0Jhonny Villarroel Rocha1John F. Múnera2Marcelo Nazzarro3Giorgio Zgrablich4Karim Sapag5 Instituto de Física Aplicada, CONICET-Universidad Nacional de San Luis, Chacabuco 917, San Luis, C.P. 5700, Argentina Instituto de Física Aplicada, CONICET-Universidad Nacional de San Luis, Chacabuco 917, San Luis, C.P. 5700, Argentina Instituto de Investigaciones en Catálisis y Petroquímica, FIQ, CONICET-Universidad Nacional del Litoral, Santa Fe, Argentina Instituto de Física Aplicada, CONICET-Universidad Nacional de San Luis, Chacabuco 917, San Luis, C.P. 5700, Argentina Instituto de Física Aplicada, CONICET-Universidad Nacional de San Luis, Chacabuco 917, San Luis, C.P. 5700, Argentina Instituto de Física Aplicada, CONICET-Universidad Nacional de San Luis, Chacabuco 917, San Luis, C.P. 5700, ArgentinaThe changes observed in the properties of Single Walled Carbon Nanotubes (SWCNTs) after treatment with nitric acid are reported. The oxidized nanotube samples were characterized morphologically by scanning electron microscopy and structurally by Raman spectroscopy, thermogravimetric analysis, infrared spectroscopy and X-ray photoelectron spectroscopy. Gas adsorption was used to study the changes in the surface properties of the samples (including the changes in their porosity), as well as the changes in the adsorbate–adsorbent interactions which occurred as a result of the acid treatment. The adsorption studies were conducted using nitrogen at 77 K and CO 2 at different temperatures between 263 K and 289 K at sub-atmospheric pressures. The isosteric heat was calculated from the data obtained and indicated a higher adsorbate–adsorbent interaction for the oxidized materials. A correlation was found between morphological and structural evolution and the adsorption properties of CO 2 , a probe gas which appears to be very suitable for characterizing the microporosity of these kinds of materials.https://doi.org/10.1260/0263-6174.29.7.705 |
| spellingShingle | Andrés A. García Blanco Jhonny Villarroel Rocha John F. Múnera Marcelo Nazzarro Giorgio Zgrablich Karim Sapag A Study of the Adsorption Properties of Single Walled Carbon Nanotubes Treated with Nitric Acid Adsorption Science & Technology |
| title | A Study of the Adsorption Properties of Single Walled Carbon Nanotubes Treated with Nitric Acid |
| title_full | A Study of the Adsorption Properties of Single Walled Carbon Nanotubes Treated with Nitric Acid |
| title_fullStr | A Study of the Adsorption Properties of Single Walled Carbon Nanotubes Treated with Nitric Acid |
| title_full_unstemmed | A Study of the Adsorption Properties of Single Walled Carbon Nanotubes Treated with Nitric Acid |
| title_short | A Study of the Adsorption Properties of Single Walled Carbon Nanotubes Treated with Nitric Acid |
| title_sort | study of the adsorption properties of single walled carbon nanotubes treated with nitric acid |
| url | https://doi.org/10.1260/0263-6174.29.7.705 |
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