Influence of Ni on enhanced catalytic activity of Cu/Co3O4 towards reduction of nitroaromatic compounds: studies on the reduction kineticsElectronic supplementary information (ESI) available: Experimental details related to the synthesis of catalysts, characterization by XRD, HPLC, FTIR, TEM, EDS elemental mapping, N2 adsorption-desorption isotherm and pore size distribution of selected samples; time dependent UV-visible absorption spectra of reaction solutions at various NaBH4 concentration, in
In this work, we have investigated the influence of Ni on Cu/Co 3 O 4 towards catalytic reduction of nitroaromatic compounds. For this purpose, Cu, Ni and CuNi alloy nanoparticles supported over Co 3 O 4 are synthesized by a surfactant aided co-reduction method. The Co 3 O 4 support is synthesized v...
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Main Authors | , , , |
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Format | Journal Article |
Language | English |
Published |
27.07.2016
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Online Access | Get full text |
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Summary: | In this work, we have investigated the influence of Ni on Cu/Co
3
O
4
towards catalytic reduction of nitroaromatic compounds. For this purpose, Cu, Ni and CuNi alloy nanoparticles supported over Co
3
O
4
are synthesized by a surfactant aided co-reduction method. The Co
3
O
4
support is synthesized
via
a template-free hydrothermal route. The Co
3
O
4
support and CuNi/Co
3
O
4
nanocatalysts are characterized by Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), UV-visible spectroscopy and Brunauer-Emmett-Teller (BET) surface area techniques. The Co
3
O
4
supported CuNi alloy nanoparticles exhibit superior catalytic performance for 4-nitrophenol (4-NP) reduction in comparison to the monometallic catalysts due to synergistic effects. Furthermore, the supported bimetallic nanoparticles demonstrate high recycling ability towards the reduction of 4-NP up to six cycles. To demonstrate the effectiveness of the highly active CuNi/Co
3
O
4
nanocatalyst towards reduction of various nitroaromatics, the catalyst is also used for reduction of 4-nitroaniline, 4-nitrotoluene, 3-nitroaniline, and 2-nitroaniline. The presence of the CuNi/Co
3
O
4
interfaces in the nanocatalyst is believed to be responsible for the high catalytic activity.
Addition of Ni significantly enhances the reaction rates of Cu/Co
3
O
4
for the catalytic reduction of nitroaromatic compounds. |
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Bibliography: | 2 adsorption-desorption isotherm and pore size distribution of selected samples; time dependent UV-visible absorption spectra of reaction solutions at various NaBH 4 Electronic supplementary information (ESI) available: Experimental details related to the synthesis of catalysts, characterization by XRD, HPLC, FTIR, TEM, EDS elemental mapping, N 10.1039/c6ra16301g concentration, influence of catalysts dosage, recycle experiments. See DOI |
ISSN: | 2046-2069 |
DOI: | 10.1039/c6ra16301g |