Fe-Ti-O based catalyst for large-chiral-angle single-walled carbon nanotube growth

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Fe-Ti-O based catalyst for large-chiral-angle single-walled carbon nanotube growth. / He, Maoshuai; Zhang, Lili; Jiang, Hua; Yang, He; Fossard, Frédéric; Cui, Hongzhi; Sun, Zhipei; Wagner, Jakob B.; Kauppinen, Esko I.; Loiseau, Annick.

In: Carbon, Vol. 107, 01.10.2016, p. 865-871.

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He, Maoshuai ; Zhang, Lili ; Jiang, Hua ; Yang, He ; Fossard, Frédéric ; Cui, Hongzhi ; Sun, Zhipei ; Wagner, Jakob B. ; Kauppinen, Esko I. ; Loiseau, Annick. / Fe-Ti-O based catalyst for large-chiral-angle single-walled carbon nanotube growth. In: Carbon. 2016 ; Vol. 107. pp. 865-871.

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@article{6235e73430824f7886a34624af0e8d4c,
title = "Fe-Ti-O based catalyst for large-chiral-angle single-walled carbon nanotube growth",
abstract = "Catalyst selection is very crucial for controlled growth of single-walled carbon nanotubes (SWNTs). Here we introduce a well-designed [Formula presented] solid solution for SWNT growth with a high preference to large chiral angles. The [Formula presented] catalyst was prepared by combining Ti layer deposition onto premade Fe nanoparticles with subsequent high-temperature air calcination, which favours the formation of a homogeneous [Formula presented] solid solution. Using CO as the carbon feedstock, chemical vapour deposition growth of SWNTs at 800 °C was demonstrated on the [Formula presented] catalyst. Nanobeam electron diffraction characterization on a number of individual SWNTs revealed that more than 94{\%} of SWNTs have chiral angles larger than 15°. In situ environmental transmission electron microscopy study was carried out to reveal the catalyst dynamics upon reduction. Our results identify that the phase segregation through reducing [Formula presented] catalyst leads to the formation of TiOx-supported small Fe nanoparticles for SWNT growth. The strong metal-support interactions induced by partial reduction of TiOx support promote the wettability of Fe nanoparticle, accounting for the preferential growth of large-chiral-angle SWNTs. This work opens a new avenue for chiral angle selective growth of SWNTs.",
author = "Maoshuai He and Lili Zhang and Hua Jiang and He Yang and Fr{\'e}d{\'e}ric Fossard and Hongzhi Cui and Zhipei Sun and Wagner, {Jakob B.} and Kauppinen, {Esko I.} and Annick Loiseau",
year = "2016",
month = "10",
day = "1",
doi = "10.1016/j.carbon.2016.06.099",
language = "English",
volume = "107",
pages = "865--871",
journal = "Carbon",
issn = "0008-6223",

}

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TY - JOUR

T1 - Fe-Ti-O based catalyst for large-chiral-angle single-walled carbon nanotube growth

AU - He, Maoshuai

AU - Zhang, Lili

AU - Jiang, Hua

AU - Yang, He

AU - Fossard, Frédéric

AU - Cui, Hongzhi

AU - Sun, Zhipei

AU - Wagner, Jakob B.

AU - Kauppinen, Esko I.

AU - Loiseau, Annick

PY - 2016/10/1

Y1 - 2016/10/1

N2 - Catalyst selection is very crucial for controlled growth of single-walled carbon nanotubes (SWNTs). Here we introduce a well-designed [Formula presented] solid solution for SWNT growth with a high preference to large chiral angles. The [Formula presented] catalyst was prepared by combining Ti layer deposition onto premade Fe nanoparticles with subsequent high-temperature air calcination, which favours the formation of a homogeneous [Formula presented] solid solution. Using CO as the carbon feedstock, chemical vapour deposition growth of SWNTs at 800 °C was demonstrated on the [Formula presented] catalyst. Nanobeam electron diffraction characterization on a number of individual SWNTs revealed that more than 94% of SWNTs have chiral angles larger than 15°. In situ environmental transmission electron microscopy study was carried out to reveal the catalyst dynamics upon reduction. Our results identify that the phase segregation through reducing [Formula presented] catalyst leads to the formation of TiOx-supported small Fe nanoparticles for SWNT growth. The strong metal-support interactions induced by partial reduction of TiOx support promote the wettability of Fe nanoparticle, accounting for the preferential growth of large-chiral-angle SWNTs. This work opens a new avenue for chiral angle selective growth of SWNTs.

AB - Catalyst selection is very crucial for controlled growth of single-walled carbon nanotubes (SWNTs). Here we introduce a well-designed [Formula presented] solid solution for SWNT growth with a high preference to large chiral angles. The [Formula presented] catalyst was prepared by combining Ti layer deposition onto premade Fe nanoparticles with subsequent high-temperature air calcination, which favours the formation of a homogeneous [Formula presented] solid solution. Using CO as the carbon feedstock, chemical vapour deposition growth of SWNTs at 800 °C was demonstrated on the [Formula presented] catalyst. Nanobeam electron diffraction characterization on a number of individual SWNTs revealed that more than 94% of SWNTs have chiral angles larger than 15°. In situ environmental transmission electron microscopy study was carried out to reveal the catalyst dynamics upon reduction. Our results identify that the phase segregation through reducing [Formula presented] catalyst leads to the formation of TiOx-supported small Fe nanoparticles for SWNT growth. The strong metal-support interactions induced by partial reduction of TiOx support promote the wettability of Fe nanoparticle, accounting for the preferential growth of large-chiral-angle SWNTs. This work opens a new avenue for chiral angle selective growth of SWNTs.

UR - http://www.scopus.com/inward/record.url?scp=84976547436&partnerID=8YFLogxK

U2 - 10.1016/j.carbon.2016.06.099

DO - 10.1016/j.carbon.2016.06.099

M3 - Article

VL - 107

SP - 865

EP - 871

JO - Carbon

JF - Carbon

SN - 0008-6223

ER -

ID: 6470336