A Green Route to Copper Loaded Silica Nanoparticles Using Hyperbranched Poly(Ethylene Imine) as a Biomimetic Template: Application in Heterogeneous Catalysis
Copper containing silica nanostructures are easily produced through a low cost versatile approach by means of hyperbranched polyethyleneimine (PEI), a water soluble dendritic polymer. This dendritic molecule enables the formation of hybrid organic/inorganic silica nanoparticles in buffered aqueous m...
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doaj-d58c657d14964be6b6d716ff5fe7dbc82020-11-25T00:17:33ZengMDPI AGCatalysts2073-43442017-12-0171239010.3390/catal7120390catal7120390A Green Route to Copper Loaded Silica Nanoparticles Using Hyperbranched Poly(Ethylene Imine) as a Biomimetic Template: Application in Heterogeneous CatalysisDimitris Tsiourvas0Aggeliki Papavasiliou1Evangelia G. Deze2Sergios K. Papageorgiou3Fotios K. Katsaros4George E. Romanos5Evangelos Poulakis6Constantine J. Philippopoulos7Qi Xin8Pegie Cool9Institute of Nanoscience and Nanotechnology, National Center for Scientific Research “Demokritos”, Aghia Paraskevi, 153 10 Athens, GreeceInstitute of Nanoscience and Nanotechnology, National Center for Scientific Research “Demokritos”, Aghia Paraskevi, 153 10 Athens, GreeceInstitute of Nanoscience and Nanotechnology, National Center for Scientific Research “Demokritos”, Aghia Paraskevi, 153 10 Athens, GreeceInstitute of Nanoscience and Nanotechnology, National Center for Scientific Research “Demokritos”, Aghia Paraskevi, 153 10 Athens, GreeceInstitute of Nanoscience and Nanotechnology, National Center for Scientific Research “Demokritos”, Aghia Paraskevi, 153 10 Athens, GreeceInstitute of Nanoscience and Nanotechnology, National Center for Scientific Research “Demokritos”, Aghia Paraskevi, 153 10 Athens, GreeceChemical Process Engineering Laboratory, Department of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Str., Zografou Campus, 157 80 Athens, GreeceChemical Process Engineering Laboratory, Department of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Str., Zografou Campus, 157 80 Athens, GreeceLaboratory of Adsorption and Catalysis, Department of Chemistry, University of Antwerpen (CDE), Universiteitsplein 1, 2610 Wilrijk, BelgiumLaboratory of Adsorption and Catalysis, Department of Chemistry, University of Antwerpen (CDE), Universiteitsplein 1, 2610 Wilrijk, BelgiumCopper containing silica nanostructures are easily produced through a low cost versatile approach by means of hyperbranched polyethyleneimine (PEI), a water soluble dendritic polymer. This dendritic molecule enables the formation of hybrid organic/inorganic silica nanoparticles in buffered aqueous media, at room temperature and neutral pH, through a biomimetic silicification process. Furthermore, the derived hybrid organic/inorganic materials dispersed in water can be easily loaded with various copper amounts, due to the presence of PEI, which, despite having been integrated in the silica network, retains its strong copper chelating ability. Following calcination, the obtained copper loaded nanopowders are characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), N2 adsorption, Temperature programmed reduction (TPR) and UV-Vis diffuse reflectance (UV-Vis-DR) techniques and evaluated for automotive exhaust purification under simulated conditions at the stoichiometric point. Effective control over final materials’ pore structural and morphological characteristics is provided by employing different buffer solutions, i.e., tris(hydroxymethyl)aminomethane (Tris) or phosphate buffer. It was found that the enhancement of the nanopowders textural features, obtained in the presence of Tris buffer, had a great impact on the material’s catalytic behavior, improving significantly its activity towards pollutants oxidation.https://www.mdpi.com/2073-4344/7/12/390hyperbranched polyethyleneiminebiomimetic synthesissilicacopperheterogeneous catalysis |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Dimitris Tsiourvas Aggeliki Papavasiliou Evangelia G. Deze Sergios K. Papageorgiou Fotios K. Katsaros George E. Romanos Evangelos Poulakis Constantine J. Philippopoulos Qi Xin Pegie Cool |
spellingShingle |
Dimitris Tsiourvas Aggeliki Papavasiliou Evangelia G. Deze Sergios K. Papageorgiou Fotios K. Katsaros George E. Romanos Evangelos Poulakis Constantine J. Philippopoulos Qi Xin Pegie Cool A Green Route to Copper Loaded Silica Nanoparticles Using Hyperbranched Poly(Ethylene Imine) as a Biomimetic Template: Application in Heterogeneous Catalysis Catalysts hyperbranched polyethyleneimine biomimetic synthesis silica copper heterogeneous catalysis |
author_facet |
Dimitris Tsiourvas Aggeliki Papavasiliou Evangelia G. Deze Sergios K. Papageorgiou Fotios K. Katsaros George E. Romanos Evangelos Poulakis Constantine J. Philippopoulos Qi Xin Pegie Cool |
author_sort |
Dimitris Tsiourvas |
title |
A Green Route to Copper Loaded Silica Nanoparticles Using Hyperbranched Poly(Ethylene Imine) as a Biomimetic Template: Application in Heterogeneous Catalysis |
title_short |
A Green Route to Copper Loaded Silica Nanoparticles Using Hyperbranched Poly(Ethylene Imine) as a Biomimetic Template: Application in Heterogeneous Catalysis |
title_full |
A Green Route to Copper Loaded Silica Nanoparticles Using Hyperbranched Poly(Ethylene Imine) as a Biomimetic Template: Application in Heterogeneous Catalysis |
title_fullStr |
A Green Route to Copper Loaded Silica Nanoparticles Using Hyperbranched Poly(Ethylene Imine) as a Biomimetic Template: Application in Heterogeneous Catalysis |
title_full_unstemmed |
A Green Route to Copper Loaded Silica Nanoparticles Using Hyperbranched Poly(Ethylene Imine) as a Biomimetic Template: Application in Heterogeneous Catalysis |
title_sort |
green route to copper loaded silica nanoparticles using hyperbranched poly(ethylene imine) as a biomimetic template: application in heterogeneous catalysis |
publisher |
MDPI AG |
series |
Catalysts |
issn |
2073-4344 |
publishDate |
2017-12-01 |
description |
Copper containing silica nanostructures are easily produced through a low cost versatile approach by means of hyperbranched polyethyleneimine (PEI), a water soluble dendritic polymer. This dendritic molecule enables the formation of hybrid organic/inorganic silica nanoparticles in buffered aqueous media, at room temperature and neutral pH, through a biomimetic silicification process. Furthermore, the derived hybrid organic/inorganic materials dispersed in water can be easily loaded with various copper amounts, due to the presence of PEI, which, despite having been integrated in the silica network, retains its strong copper chelating ability. Following calcination, the obtained copper loaded nanopowders are characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), N2 adsorption, Temperature programmed reduction (TPR) and UV-Vis diffuse reflectance (UV-Vis-DR) techniques and evaluated for automotive exhaust purification under simulated conditions at the stoichiometric point. Effective control over final materials’ pore structural and morphological characteristics is provided by employing different buffer solutions, i.e., tris(hydroxymethyl)aminomethane (Tris) or phosphate buffer. It was found that the enhancement of the nanopowders textural features, obtained in the presence of Tris buffer, had a great impact on the material’s catalytic behavior, improving significantly its activity towards pollutants oxidation. |
topic |
hyperbranched polyethyleneimine biomimetic synthesis silica copper heterogeneous catalysis |
url |
https://www.mdpi.com/2073-4344/7/12/390 |
work_keys_str_mv |
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