Conducting Polymer–TiO2 Hybrid Materials: Application in the Removal of Nitrates from Water
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Title: | Conducting Polymer–TiO2 Hybrid Materials: Application in the Removal of Nitrates from Water |
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Authors: | Villora-Picó, Juan José | Belda-Alcázar, Victor | García Fernández, María Jesús | Serrano, Elena | Sepúlveda-Escribano, Antonio | Pastor-Blas, M. Mercedes |
Research Group/s: | Materiales Avanzados | Laboratorio de Nanotecnología Molecular (NANOMOL) |
Center, Department or Service: | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales |
Keywords: | Titania-polymer hybrids | Nitrate reduction | Platinum nanoparticles | Plasma treatment |
Knowledge Area: | Química Inorgánica |
Issue Date: | 15-Apr-2019 |
Publisher: | American Chemical Society |
Citation: | Langmuir. 2019, 35(18): 6089-6105. doi:10.1021/acs.langmuir.9b00174 |
Abstract: | Materials able to produce the reduction of nitrate from water without the need of a metal catalyst and with avoiding the use of gaseous hydrogen have been developed by combining the synergistic properties of titania and two conducting polymers. Polymerization of aniline and pyrrol on titanium dioxide in the presence of two different oxidants/dopants (iron trichloride or potassium persulfate) has been evaluated. The resulting hybrid materials have good thermal stability imparted by the titania counterpart, and a considerable conductivity provided by the conducting polymers. The capability of the hybrid materials of reducing aqueous nitrate has been assessed and compared to the catalytic hydrogenation of nitrate using a platinum catalyst supported on these hybrid synthesized materials. The mechanism of nitrate abatement implies adsorption of nitrate on the polymer by ion exchange with the dopant anion, followed by the reduction of nitrate. The electron transfer from titania to the conducting polymer in the hybrid material favors the reductive ability of the polymer, in such a way that nitrate is selectively reduced with a very low production of undesirable side products. The obtained results show that the activity and selectivity of the catalytic reduction of nitrate with dihydrogen in the presence of a platinum catalyst supported on the hybrid materials are considerably lower than those of the metal-free nanocomposites. |
Sponsor: | Financial support from Generalitat Valenciana, Spain (PROMETEOII/2014/004) and Ministry of Economy and Competitivity (MAT2016-80285-P) is gratefully acknowledged. E.S. acknowledges the Spanish MINECO and AEI/FEDER (ref CTQ2015-74494-JIN) and the University of Alicante (ref UATALENTO16-03). |
URI: | http://hdl.handle.net/10045/91650 |
ISSN: | 0743-7463 (Print) | 1520-5827 (Online) |
DOI: | 10.1021/acs.langmuir.9b00174 |
Language: | eng |
Type: | info:eu-repo/semantics/article |
Rights: | © 2019 American Chemical Society |
Peer Review: | si |
Publisher version: | https://doi.org/10.1021/acs.langmuir.9b00174 |
Appears in Collections: | INV - NANOMOL - Artículos de Revistas INV - LMA - Artículos de Revistas |
Files in This Item:
File | Description | Size | Format | |
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2019_Villora-Pico_etal_Langmuir_final.pdf | Versión final (acceso restringido) | 11,37 MB | Adobe PDF | Open Request a copy |
2019_Villora-Pico_etal_Langmuir_accepted.pdf | Accepted Manuscript (acceso abierto) | 2,09 MB | Adobe PDF | Open Preview |
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