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Preparation and surface functionalization of MWCNTs: study of the composite materials produced by the interaction with an iron phthalocyanine complex.

Asedegbega-Nieto E, Pérez-Cadenas M, Carter J, Anderson JA, Guerrero-Ruiz A - Nanoscale Res Lett (2011)

Bottom Line: All three CNTs (the as-synthesized and functionalized) underwent reaction with an iron organometallic complex (FePcS), iron(III) phthalocyanine-4,4",4",4"-tetrasulfonic acid, in order to study the nature of the interaction between this complex and the CNTs and the potential formation of nanocomposite materials.Transmission electronic microscopy, N2 adsorption at 77 K, thermogravimetric analysis, temperature-programmed desorption, and X-ray photoelectron spectroscopy were the characterization techniques employed to confirm the successful functionalization of CNTs as well as the type of interaction existing with the FePcS.All results obtained led to the same conclusion: There were no specific chemical interactions between CNTs and the fixed FePcS.

View Article: PubMed Central - HTML - PubMed

Affiliation: Departamento de Química Inorgánica y Técnica, Facultad de Ciencias, UNED, Paseo Senda del Rey no, 9, 28040 Madrid, Spain. easedegbega@ccia.uned.es.

ABSTRACT
Carbon nanotubes [CNTs] were synthesized by the catalytic vapor decomposition method. Thereafter, they were functionalized in order to incorporate the oxygen groups (OCNT) and subsequently the amine groups (ACNT). All three CNTs (the as-synthesized and functionalized) underwent reaction with an iron organometallic complex (FePcS), iron(III) phthalocyanine-4,4",4",4"-tetrasulfonic acid, in order to study the nature of the interaction between this complex and the CNTs and the potential formation of nanocomposite materials. Transmission electronic microscopy, N2 adsorption at 77 K, thermogravimetric analysis, temperature-programmed desorption, and X-ray photoelectron spectroscopy were the characterization techniques employed to confirm the successful functionalization of CNTs as well as the type of interaction existing with the FePcS. All results obtained led to the same conclusion: There were no specific chemical interactions between CNTs and the fixed FePcS.

No MeSH data available.


Related in: MedlinePlus

TPD profiles of the evolution of CO2. TPD, Temperature-programmed desorption.
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Figure 2: TPD profiles of the evolution of CO2. TPD, Temperature-programmed desorption.

Mentions: The evolution of CO and CO2 was followed by TPD experiments for all three CNT samples. The profiles obtained gave an estimate of the surface oxygen-containing groups. A significant increase was observed after oxidation treatment of the synthesized CNTs, which reveals that this chemical oxidation is an efficient way to facilitate oxygen incorporation into CNTs. On the other hand, the amination of OCNT gave rise to a reduction in the intensity of CO and CO2 peaks due to the decrease in the surface oxygen groups at the expense of the newly formed amine groups. These TPD results suggest that there is indeed interaction between the acidic oxygen groups of the OCNT and the ethylenediamine in the production of ACNT (Figure 2).


Preparation and surface functionalization of MWCNTs: study of the composite materials produced by the interaction with an iron phthalocyanine complex.

Asedegbega-Nieto E, Pérez-Cadenas M, Carter J, Anderson JA, Guerrero-Ruiz A - Nanoscale Res Lett (2011)

TPD profiles of the evolution of CO2. TPD, Temperature-programmed desorption.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211443&req=5

Figure 2: TPD profiles of the evolution of CO2. TPD, Temperature-programmed desorption.
Mentions: The evolution of CO and CO2 was followed by TPD experiments for all three CNT samples. The profiles obtained gave an estimate of the surface oxygen-containing groups. A significant increase was observed after oxidation treatment of the synthesized CNTs, which reveals that this chemical oxidation is an efficient way to facilitate oxygen incorporation into CNTs. On the other hand, the amination of OCNT gave rise to a reduction in the intensity of CO and CO2 peaks due to the decrease in the surface oxygen groups at the expense of the newly formed amine groups. These TPD results suggest that there is indeed interaction between the acidic oxygen groups of the OCNT and the ethylenediamine in the production of ACNT (Figure 2).

Bottom Line: All three CNTs (the as-synthesized and functionalized) underwent reaction with an iron organometallic complex (FePcS), iron(III) phthalocyanine-4,4",4",4"-tetrasulfonic acid, in order to study the nature of the interaction between this complex and the CNTs and the potential formation of nanocomposite materials.Transmission electronic microscopy, N2 adsorption at 77 K, thermogravimetric analysis, temperature-programmed desorption, and X-ray photoelectron spectroscopy were the characterization techniques employed to confirm the successful functionalization of CNTs as well as the type of interaction existing with the FePcS.All results obtained led to the same conclusion: There were no specific chemical interactions between CNTs and the fixed FePcS.

View Article: PubMed Central - HTML - PubMed

Affiliation: Departamento de Química Inorgánica y Técnica, Facultad de Ciencias, UNED, Paseo Senda del Rey no, 9, 28040 Madrid, Spain. easedegbega@ccia.uned.es.

ABSTRACT
Carbon nanotubes [CNTs] were synthesized by the catalytic vapor decomposition method. Thereafter, they were functionalized in order to incorporate the oxygen groups (OCNT) and subsequently the amine groups (ACNT). All three CNTs (the as-synthesized and functionalized) underwent reaction with an iron organometallic complex (FePcS), iron(III) phthalocyanine-4,4",4",4"-tetrasulfonic acid, in order to study the nature of the interaction between this complex and the CNTs and the potential formation of nanocomposite materials. Transmission electronic microscopy, N2 adsorption at 77 K, thermogravimetric analysis, temperature-programmed desorption, and X-ray photoelectron spectroscopy were the characterization techniques employed to confirm the successful functionalization of CNTs as well as the type of interaction existing with the FePcS. All results obtained led to the same conclusion: There were no specific chemical interactions between CNTs and the fixed FePcS.

No MeSH data available.


Related in: MedlinePlus