A study concerning the pretreatment of CNTs and its influence on the performance of NIB/CNTs amorphous catalyst
As prepared carbon nanotubes were pretreated with nitric acid (CNTs-HNO3) or ammonia (CNTs-NH3). Fourier transform infrared spectroscopy (FTIR) measurements showed that the surface of the nanotubes was functionalized with carboxylic and hydroxyl functional groups after the acid treatment and that ba...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Serbian Chemical Society
2006-01-01
|
Series: | Journal of the Serbian Chemical Society |
Subjects: | |
Online Access: | http://www.doiserbia.nb.rs/img/doi/0352-5139/2006/0352-51390611153H.pdf |
id |
doaj-e94b7ffa1e684281aebe44f1eb801dd4 |
---|---|
record_format |
Article |
spelling |
doaj-e94b7ffa1e684281aebe44f1eb801dd42020-12-24T14:31:10ZengSerbian Chemical Society Journal of the Serbian Chemical Society0352-51391820-74212006-01-0171111153116010.2298/JSC0611153H0352-51390611153HA study concerning the pretreatment of CNTs and its influence on the performance of NIB/CNTs amorphous catalystHu-Yuan Chang0Li Feng YI.1Hua Li.2Zhang Bin Rong3Department of chemistry, Nanchang University, Nanchang, Jiangxi, Jiangxi Key Laboratory of Nationals Surface Engineering, Jiangxi Science and Technology Normal University, NanchangDepartment of chemistry, Nanchang University, NanchangDepartment of chemistry, Nanchang University, NanchangDepartment of chemistry, Nanchang University, NanchangAs prepared carbon nanotubes were pretreated with nitric acid (CNTs-HNO3) or ammonia (CNTs-NH3). Fourier transform infrared spectroscopy (FTIR) measurements showed that the surface of the nanotubes was functionalized with carboxylic and hydroxyl functional groups after the acid treatment and that basic groups containing nitrogen, such as N-H and C-N, were introduced to the surface of the nanotubes after the ammonia treatment. X-Ray diffraction analysis implied that the nickel residue in the CNTs was effectively removed by acid treatment. However, the nickel residue was only partially eliminated by ammonia pretreatment. NiB amorphous catalysts supported on CNTs-HNO3 and CNTs-NH3 were prepared by the impregnation-chemical reduction method and characterized by transmission electron microscopy (TEM), as well as inductively coupled plasma (ICP) spectroscopy and studied in the selective hydrogenation of acetylene. TEM measurements showed that a high density NiB particles of about 9 nm were homogeneously dispersed on the CNTs-NH3. However, NiB particles (13-23 nm)with amean size of 16 nm were scattered on the CNTs-HNO3.As a result, the activity and selectivity of NiB/CNTs-NH3 were higher than those of NiB/CNTs-HNO3 in the selective hydrogenation of acetylene.http://www.doiserbia.nb.rs/img/doi/0352-5139/2006/0352-51390611153H.pdfcntspretreatmentnib amorphous catalystacetylene selective hydrogenationammonia |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hu-Yuan Chang Li Feng YI. Hua Li. Zhang Bin Rong |
spellingShingle |
Hu-Yuan Chang Li Feng YI. Hua Li. Zhang Bin Rong A study concerning the pretreatment of CNTs and its influence on the performance of NIB/CNTs amorphous catalyst Journal of the Serbian Chemical Society cnts pretreatment nib amorphous catalyst acetylene selective hydrogenation ammonia |
author_facet |
Hu-Yuan Chang Li Feng YI. Hua Li. Zhang Bin Rong |
author_sort |
Hu-Yuan Chang |
title |
A study concerning the pretreatment of CNTs and its influence on the performance of NIB/CNTs amorphous catalyst |
title_short |
A study concerning the pretreatment of CNTs and its influence on the performance of NIB/CNTs amorphous catalyst |
title_full |
A study concerning the pretreatment of CNTs and its influence on the performance of NIB/CNTs amorphous catalyst |
title_fullStr |
A study concerning the pretreatment of CNTs and its influence on the performance of NIB/CNTs amorphous catalyst |
title_full_unstemmed |
A study concerning the pretreatment of CNTs and its influence on the performance of NIB/CNTs amorphous catalyst |
title_sort |
study concerning the pretreatment of cnts and its influence on the performance of nib/cnts amorphous catalyst |
publisher |
Serbian Chemical Society |
series |
Journal of the Serbian Chemical Society |
issn |
0352-5139 1820-7421 |
publishDate |
2006-01-01 |
description |
As prepared carbon nanotubes were pretreated with nitric acid (CNTs-HNO3) or ammonia (CNTs-NH3). Fourier transform infrared spectroscopy (FTIR) measurements showed that the surface of the nanotubes was functionalized with carboxylic and hydroxyl functional groups after the acid treatment and that basic groups containing nitrogen, such as N-H and C-N, were introduced to the surface of the nanotubes after the ammonia treatment. X-Ray diffraction analysis implied that the nickel residue in the CNTs was effectively removed by acid treatment. However, the nickel residue was only partially eliminated by ammonia pretreatment. NiB amorphous catalysts supported on CNTs-HNO3 and CNTs-NH3 were prepared by the impregnation-chemical reduction method and characterized by transmission electron microscopy (TEM), as well as inductively coupled plasma (ICP) spectroscopy and studied in the selective hydrogenation of acetylene. TEM measurements showed that a high density NiB particles of about 9 nm were homogeneously dispersed on the CNTs-NH3. However, NiB particles (13-23 nm)with amean size of 16 nm were scattered on the CNTs-HNO3.As a result, the activity and selectivity of NiB/CNTs-NH3 were higher than those of NiB/CNTs-HNO3 in the selective hydrogenation of acetylene. |
topic |
cnts pretreatment nib amorphous catalyst acetylene selective hydrogenation ammonia |
url |
http://www.doiserbia.nb.rs/img/doi/0352-5139/2006/0352-51390611153H.pdf |
work_keys_str_mv |
AT huyuanchang astudyconcerningthepretreatmentofcntsanditsinfluenceontheperformanceofnibcntsamorphouscatalyst AT lifengyi astudyconcerningthepretreatmentofcntsanditsinfluenceontheperformanceofnibcntsamorphouscatalyst AT huali astudyconcerningthepretreatmentofcntsanditsinfluenceontheperformanceofnibcntsamorphouscatalyst AT zhangbinrong astudyconcerningthepretreatmentofcntsanditsinfluenceontheperformanceofnibcntsamorphouscatalyst AT huyuanchang studyconcerningthepretreatmentofcntsanditsinfluenceontheperformanceofnibcntsamorphouscatalyst AT lifengyi studyconcerningthepretreatmentofcntsanditsinfluenceontheperformanceofnibcntsamorphouscatalyst AT huali studyconcerningthepretreatmentofcntsanditsinfluenceontheperformanceofnibcntsamorphouscatalyst AT zhangbinrong studyconcerningthepretreatmentofcntsanditsinfluenceontheperformanceofnibcntsamorphouscatalyst |
_version_ |
1724371818679107584 |