A Study on the Stability of Carbon Nanoforms–Polyimidazolium Network Hybrids in the Conversion of CO<sub<2</sub< into Cyclic Carbonates: Increase in Catalytic Activity after Reuse

Three different carbon nanoforms (CNFs), single-walled and multi-walled carbon nanotubes (SWCNTs, MWCNTs) and carbon nanohorns (CNHs), have been used as supports for the direct polymerization of variable amounts of a bis-vinylimidazolium salt. Transmission electron microscopy confirmed that all CNFs...
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Autor*in:	Anthony Morena [verfasserIn] Vincenzo Campisciano [verfasserIn] Adrien Comès [verfasserIn] Leonarda Francesca Liotta [verfasserIn] Michelangelo Gruttadauria [verfasserIn] Carmela Aprile [verfasserIn] Francesco Giacalone [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2021

Schlagwörter:	carbon dioxide fixation carbon nanotubes cyclic carbonates

Übergeordnetes Werk:	In: Nanomaterials - MDPI AG, 2012, 11(2021), 9, p 2243
Übergeordnetes Werk:	volume:11 ; year:2021 ; number:9, p 2243

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3390/nano11092243

Katalog-ID:	DOAJ053503651

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callnumber-first	Q - Science
author	Anthony Morena
spellingShingle	Anthony Morena misc QD1-999 misc carbon dioxide fixation misc carbon nanotubes misc cyclic carbonates misc Chemistry A Study on the Stability of Carbon Nanoforms–Polyimidazolium Network Hybrids in the Conversion of CO<sub<2</sub< into Cyclic Carbonates: Increase in Catalytic Activity after Reuse
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topic_title	QD1-999 A Study on the Stability of Carbon Nanoforms–Polyimidazolium Network Hybrids in the Conversion of CO<sub<2</sub< into Cyclic Carbonates: Increase in Catalytic Activity after Reuse carbon dioxide fixation carbon nanotubes cyclic carbonates
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title	A Study on the Stability of Carbon Nanoforms–Polyimidazolium Network Hybrids in the Conversion of CO<sub<2</sub< into Cyclic Carbonates: Increase in Catalytic Activity after Reuse
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title_full	A Study on the Stability of Carbon Nanoforms–Polyimidazolium Network Hybrids in the Conversion of CO<sub<2</sub< into Cyclic Carbonates: Increase in Catalytic Activity after Reuse
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title_sort	study on the stability of carbon nanoforms–polyimidazolium network hybrids in the conversion of co<sub<2</sub< into cyclic carbonates: increase in catalytic activity after reuse
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title_auth	A Study on the Stability of Carbon Nanoforms–Polyimidazolium Network Hybrids in the Conversion of CO<sub<2</sub< into Cyclic Carbonates: Increase in Catalytic Activity after Reuse
abstract	Three different carbon nanoforms (CNFs), single-walled and multi-walled carbon nanotubes (SWCNTs, MWCNTs) and carbon nanohorns (CNHs), have been used as supports for the direct polymerization of variable amounts of a bis-vinylimidazolium salt. Transmission electron microscopy confirmed that all CNFs act as templates on the growth of the polymeric network, which perfectly covers the nanocarbons forming a cylindrical (SWCNTs, MWCNTs) or spherical (CNHs) coating. The stability of these hybrid materials was investigated in the conversion of CO<sub<2</sub< into cyclic carbonate under high temperature and CO<sub<2</sub< pressure. Compared with the homopolymerized monomer, nanotube-based materials display an improved catalytic activity. Beside the low catalytic loading (0.05–0.09 mol%) and the absence of Lewis acid co-catalysts, all the materials showed high TON values (up to 1154 for epichlorohydrin with SW-1:2). Interestingly, despite the loss of part of the polymeric coating for crumbling or peeling, the activity increases upon recycling of the materials, and this behaviour was ascribed to their change in morphology, which led to materials with higher surface areas and with more accessible catalytic sites. Transmission electron microscopy analysis, along with different experiments, have been carried out in order to elucidate these findings.
abstractGer	Three different carbon nanoforms (CNFs), single-walled and multi-walled carbon nanotubes (SWCNTs, MWCNTs) and carbon nanohorns (CNHs), have been used as supports for the direct polymerization of variable amounts of a bis-vinylimidazolium salt. Transmission electron microscopy confirmed that all CNFs act as templates on the growth of the polymeric network, which perfectly covers the nanocarbons forming a cylindrical (SWCNTs, MWCNTs) or spherical (CNHs) coating. The stability of these hybrid materials was investigated in the conversion of CO<sub<2</sub< into cyclic carbonate under high temperature and CO<sub<2</sub< pressure. Compared with the homopolymerized monomer, nanotube-based materials display an improved catalytic activity. Beside the low catalytic loading (0.05–0.09 mol%) and the absence of Lewis acid co-catalysts, all the materials showed high TON values (up to 1154 for epichlorohydrin with SW-1:2). Interestingly, despite the loss of part of the polymeric coating for crumbling or peeling, the activity increases upon recycling of the materials, and this behaviour was ascribed to their change in morphology, which led to materials with higher surface areas and with more accessible catalytic sites. Transmission electron microscopy analysis, along with different experiments, have been carried out in order to elucidate these findings.
abstract_unstemmed	Three different carbon nanoforms (CNFs), single-walled and multi-walled carbon nanotubes (SWCNTs, MWCNTs) and carbon nanohorns (CNHs), have been used as supports for the direct polymerization of variable amounts of a bis-vinylimidazolium salt. Transmission electron microscopy confirmed that all CNFs act as templates on the growth of the polymeric network, which perfectly covers the nanocarbons forming a cylindrical (SWCNTs, MWCNTs) or spherical (CNHs) coating. The stability of these hybrid materials was investigated in the conversion of CO<sub<2</sub< into cyclic carbonate under high temperature and CO<sub<2</sub< pressure. Compared with the homopolymerized monomer, nanotube-based materials display an improved catalytic activity. Beside the low catalytic loading (0.05–0.09 mol%) and the absence of Lewis acid co-catalysts, all the materials showed high TON values (up to 1154 for epichlorohydrin with SW-1:2). Interestingly, despite the loss of part of the polymeric coating for crumbling or peeling, the activity increases upon recycling of the materials, and this behaviour was ascribed to their change in morphology, which led to materials with higher surface areas and with more accessible catalytic sites. Transmission electron microscopy analysis, along with different experiments, have been carried out in order to elucidate these findings.
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title_short	A Study on the Stability of Carbon Nanoforms–Polyimidazolium Network Hybrids in the Conversion of CO<sub<2</sub< into Cyclic Carbonates: Increase in Catalytic Activity after Reuse
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A Study on the Stability of Carbon Nanoforms–Polyimidazolium Network Hybrids in the Conversion of CO<sub<2</sub< into Cyclic Carbonates: Increase in Catalytic Activity after Reuse

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