Carboxylation treatment of multiwalled carbon nanotubes monitored by infrared and ultraviolet spectroscopies and scanning probe microscopy

The effect of acid treatment on multiwalled carbon nanotubes (MWCNTs) was investigated through analysis of their morphologies followed by atomic force microscopy (AFM). The chemical changes were monitored by Fourier transform infrared (FTIR) and ultraviolet (UV/Vis) spectrophotometries. Treatments w...

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Detalles Bibliográficos
Autor principal: Goyanes, Silvia Nair
Publicado: 2007
Materias:
Characterization
Chemical treatment
Multiwalled carbon nanotubes (MWCNTs)
Scanning probe techniques
Spectrophotometry
Atomic force microscopy
Carboxylation
Fourier transform infrared spectroscopy
Infrared spectroscopy
Ultraviolet spectrophotometers
Multiwalled carbon nanotubes (MWCNT)
Carbon nanotubes
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09259635_v16_n2_p412_Goyanes
http://hdl.handle.net/20.500.12110/paper_09259635_v16_n2_p412_Goyanes
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_09259635_v16_n2_p412_Goyanes
record_format dspace
spelling paper:paper_09259635_v16_n2_p412_Goyanes2023-06-08T15:51:30Z Carboxylation treatment of multiwalled carbon nanotubes monitored by infrared and ultraviolet spectroscopies and scanning probe microscopy Goyanes, Silvia Nair Characterization Chemical treatment Multiwalled carbon nanotubes (MWCNTs) Scanning probe techniques Spectrophotometry Atomic force microscopy Carboxylation Characterization Fourier transform infrared spectroscopy Infrared spectroscopy Ultraviolet spectrophotometers Chemical treatment Multiwalled carbon nanotubes (MWCNT) Scanning probe techniques Carbon nanotubes The effect of acid treatment on multiwalled carbon nanotubes (MWCNTs) was investigated through analysis of their morphologies followed by atomic force microscopy (AFM). The chemical changes were monitored by Fourier transform infrared (FTIR) and ultraviolet (UV/Vis) spectrophotometries. Treatments with nitric acid as well as with a mixture of nitric and sulfuric acids (1:3 by volume) were analyzed. Both acid treatments applied during a short ultrasonication time do not show any relevant effect. However, an additional peak can be observed at 1200 cm- 1 in the FTIR spectrum of the MWCNTs treated with the acid mixture after 2 h but their UV/Vis spectrum did not change. These results could indicate that new C-O groups appear in the open ends of the nanotubes without modifying the structure of their sidewalls. When the treatment with the acid mixture was prolonged, the sidewall of the nanotubes began to be destroyed up to their nearly complete destruction as observed by both UV/Vis and AFM. The results reported in this work show that three simple and quick techniques can help to control the carboxylation process often carried out before the functionalization of MWCNTs. © 2006 Elsevier B.V. All rights reserved. Fil:Goyanes, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2007 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09259635_v16_n2_p412_Goyanes http://hdl.handle.net/20.500.12110/paper_09259635_v16_n2_p412_Goyanes
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Characterization
Chemical treatment
Multiwalled carbon nanotubes (MWCNTs)
Scanning probe techniques
Spectrophotometry
Atomic force microscopy
Carboxylation
Characterization
Fourier transform infrared spectroscopy
Infrared spectroscopy
Ultraviolet spectrophotometers
Chemical treatment
Multiwalled carbon nanotubes (MWCNT)
Scanning probe techniques
Carbon nanotubes
spellingShingle Characterization
Chemical treatment
Multiwalled carbon nanotubes (MWCNTs)
Scanning probe techniques
Spectrophotometry
Atomic force microscopy
Carboxylation
Characterization
Fourier transform infrared spectroscopy
Infrared spectroscopy
Ultraviolet spectrophotometers
Chemical treatment
Multiwalled carbon nanotubes (MWCNT)
Scanning probe techniques
Carbon nanotubes
Goyanes, Silvia Nair
Carboxylation treatment of multiwalled carbon nanotubes monitored by infrared and ultraviolet spectroscopies and scanning probe microscopy
topic_facet Characterization
Chemical treatment
Multiwalled carbon nanotubes (MWCNTs)
Scanning probe techniques
Spectrophotometry
Atomic force microscopy
Carboxylation
Characterization
Fourier transform infrared spectroscopy
Infrared spectroscopy
Ultraviolet spectrophotometers
Chemical treatment
Multiwalled carbon nanotubes (MWCNT)
Scanning probe techniques
Carbon nanotubes
description The effect of acid treatment on multiwalled carbon nanotubes (MWCNTs) was investigated through analysis of their morphologies followed by atomic force microscopy (AFM). The chemical changes were monitored by Fourier transform infrared (FTIR) and ultraviolet (UV/Vis) spectrophotometries. Treatments with nitric acid as well as with a mixture of nitric and sulfuric acids (1:3 by volume) were analyzed. Both acid treatments applied during a short ultrasonication time do not show any relevant effect. However, an additional peak can be observed at 1200 cm- 1 in the FTIR spectrum of the MWCNTs treated with the acid mixture after 2 h but their UV/Vis spectrum did not change. These results could indicate that new C-O groups appear in the open ends of the nanotubes without modifying the structure of their sidewalls. When the treatment with the acid mixture was prolonged, the sidewall of the nanotubes began to be destroyed up to their nearly complete destruction as observed by both UV/Vis and AFM. The results reported in this work show that three simple and quick techniques can help to control the carboxylation process often carried out before the functionalization of MWCNTs. © 2006 Elsevier B.V. All rights reserved.
author Goyanes, Silvia Nair
author_facet Goyanes, Silvia Nair
author_sort Goyanes, Silvia Nair
title Carboxylation treatment of multiwalled carbon nanotubes monitored by infrared and ultraviolet spectroscopies and scanning probe microscopy
title_short Carboxylation treatment of multiwalled carbon nanotubes monitored by infrared and ultraviolet spectroscopies and scanning probe microscopy
title_full Carboxylation treatment of multiwalled carbon nanotubes monitored by infrared and ultraviolet spectroscopies and scanning probe microscopy
title_fullStr Carboxylation treatment of multiwalled carbon nanotubes monitored by infrared and ultraviolet spectroscopies and scanning probe microscopy
title_full_unstemmed Carboxylation treatment of multiwalled carbon nanotubes monitored by infrared and ultraviolet spectroscopies and scanning probe microscopy
title_sort carboxylation treatment of multiwalled carbon nanotubes monitored by infrared and ultraviolet spectroscopies and scanning probe microscopy
publishDate 2007
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09259635_v16_n2_p412_Goyanes
http://hdl.handle.net/20.500.12110/paper_09259635_v16_n2_p412_Goyanes
work_keys_str_mv AT goyanessilvianair carboxylationtreatmentofmultiwalledcarbonnanotubesmonitoredbyinfraredandultravioletspectroscopiesandscanningprobemicroscopy
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