EXAFS and DFT study of the cadmium and lead adsorption on modified silica nanoparticles

Silica nanoparticles of 7 nm diameter were modified with (3-aminopropyl) triethoxysilane (APTES) and characterized by CP-MAS <sup>13</sup>C and <sup>29</sup>Si NMR, FTIR, zeta potential measurements, and thermogravimetry. The particles were shown to sorb successfully divalent...

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Detalles Bibliográficos
Autores principales: Arce, Valeria Beatriz, Gargarello, Romina M., Ortega, Florencia, Romañano, Virginia, Mizrahi, Martín D., Ramallo López, José Martín, Cobos, Carlos Jorge, Airoldi, Claudio, Bernardelli, Cecilia Elena, Donati, Edgardo Rubén, Mártire, Daniel Osvaldo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Exactas
Cadmium
Lead
Silica nanoparticles
EXAFS
DFT
MEH-PPV
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/108444
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-108444
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Cadmium
Lead
Silica nanoparticles
EXAFS
DFT
MEH-PPV
spellingShingle Ciencias Exactas
Cadmium
Lead
Silica nanoparticles
EXAFS
DFT
MEH-PPV
Arce, Valeria Beatriz
Gargarello, Romina M.
Ortega, Florencia
Romañano, Virginia
Mizrahi, Martín D.
Ramallo López, José Martín
Cobos, Carlos Jorge
Airoldi, Claudio
Bernardelli, Cecilia Elena
Donati, Edgardo Rubén
Mártire, Daniel Osvaldo
EXAFS and DFT study of the cadmium and lead adsorption on modified silica nanoparticles
topic_facet Ciencias Exactas
Cadmium
Lead
Silica nanoparticles
EXAFS
DFT
MEH-PPV
description Silica nanoparticles of 7 nm diameter were modified with (3-aminopropyl) triethoxysilane (APTES) and characterized by CP-MAS <sup>13</sup>C and <sup>29</sup>Si NMR, FTIR, zeta potential measurements, and thermogravimetry. The particles were shown to sorb successfully divalent lead and cadmium ions from aqueous solution. Lead complexation with these silica nanoparticles was clearly confirmed by EXAFS (Extended X-ray Absorption Fine Structure) with synchrotron light measurements. Predicted Pb–N and Pb–C distances obtained from quantum-chemical calculations are in very good agreement with the EXAFS determinations. The calculations also support the higher APTES affinity for Pb<sup>2+</sup> compared to Cd<sup>2+</sup>.
format Articulo
Articulo
author Arce, Valeria Beatriz
Gargarello, Romina M.
Ortega, Florencia
Romañano, Virginia
Mizrahi, Martín D.
Ramallo López, José Martín
Cobos, Carlos Jorge
Airoldi, Claudio
Bernardelli, Cecilia Elena
Donati, Edgardo Rubén
Mártire, Daniel Osvaldo
author_facet Arce, Valeria Beatriz
Gargarello, Romina M.
Ortega, Florencia
Romañano, Virginia
Mizrahi, Martín D.
Ramallo López, José Martín
Cobos, Carlos Jorge
Airoldi, Claudio
Bernardelli, Cecilia Elena
Donati, Edgardo Rubén
Mártire, Daniel Osvaldo
author_sort Arce, Valeria Beatriz
title EXAFS and DFT study of the cadmium and lead adsorption on modified silica nanoparticles
title_short EXAFS and DFT study of the cadmium and lead adsorption on modified silica nanoparticles
title_full EXAFS and DFT study of the cadmium and lead adsorption on modified silica nanoparticles
title_fullStr EXAFS and DFT study of the cadmium and lead adsorption on modified silica nanoparticles
title_full_unstemmed EXAFS and DFT study of the cadmium and lead adsorption on modified silica nanoparticles
title_sort exafs and dft study of the cadmium and lead adsorption on modified silica nanoparticles
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/108444
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