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N-doped cnt as a metal-free catalyst for reduction of nitro-benzene derivatives

AuthorsRocha, Mariana F.; Jarrais, Bruno; Araújo, Mariana; Pérez-Cadenas, María; Bachiller-Baeza, B.; Rebelo, Susana L. H.; Rodríguez-Ramos, Inmaculada; Guerrero-Ruiz, Antonio; Freire, Cristina
Issue Date6-May-2013
Citation9º Encontro Nacional de Catálise e Materiais Porosos (2013)
AbstractNitroaromatic compounds are commonly used in many industrial processes, including the preparation of pesticides, explosives, textiles and paper. Therefore, they are often detected as water pollutants as a result of their release in industrial effluents. Wastewaters remediation containing these pollutants is very problematic, since they are usually resistant to conventional degradation treatrnents. The physical- and chemical properties of carbon nanotubes (CNTs), particularly the basic character, can be tailored by the incorporation of nitrogen atoms in their structure. [2] N-doped CNTs have been proposed as supports for metal catalysts. Besides, these materials have been also used as metal-free catalysts for the selective oxidation of H2 S reaction, the oxygen reduction reaction or base-catalysed reactions.Here, we report the first use of CNT-N as a metal-free catalyst for the reduction of 4-nitrophenol (4NP) and 4-nitroaniline (4NA) in the presence of NaBH4 . Carbon nanotubes (CNT-N) were synthesized in a fluidized-bed reactor, over a Fe/Si02 catalyst, by catalytic chemical vapour decomposition of acetonitrile vapour and were characterized by transmission electron microscopy (TEM), N2 adsorption isotherm determination (BET) and X-ray photoelectron spectroscopy (XPS). The catalytic experiments were monitored by UV-Vis and the products of the reactions were characterized by 1HNMR.
DescriptionTrabajo presentado en el 9º Encontro Nacional de Catálise e Materiais Porosos, celebrado en Oporto (Portugal) del 6 al 7 de mayo de 2013.
Appears in Collections:(ICP) Comunicaciones congresos
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