Pretreatment of carbon nanotubes: Effects on its properties and catalytic performances

The effects of pretreatment via acid and thermal treatment on the properties of multi-walled carbon nanotubes (MWCNTs) are studied using FTIR, TGA, Raman spectroscopy and TEM. Meanwhile, catalytic performances of Cu/ZnO catalysts supported on raw and treated CNTs are evaluated by CO2 hydrogenation i...

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Bibliographic Details
Main Authors: Sulong, Tuan Syahylah Tuan, Zabidi, Noor Asmawati Mohd, Shaharun, Maizatul Shima
Format: Conference Proceeding
Language:English
Subjects:
Carbon dioxide
Catalysis
Catalysts
Fourier transforms
Functional groups
Heat treatment
Infrared spectroscopy
Metal particles
Methanol
Moisture content
Multi wall carbon nanotubes
Nanotubes
Pretreatment
Raman spectroscopy
Spectrum analysis
Zinc oxide
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Summary:The effects of pretreatment via acid and thermal treatment on the properties of multi-walled carbon nanotubes (MWCNTs) are studied using FTIR, TGA, Raman spectroscopy and TEM. Meanwhile, catalytic performances of Cu/ZnO catalysts supported on raw and treated CNTs are evaluated by CO2 hydrogenation into methanol using a fixed-bed microactivity reactor. Pretreatment of CNTs have removed caps, created defects on CNTs wall and also introduced some functional groups as confirmed by FTIR, TGA, Raman spectroscopy and TEM. However, deposition of metals into the support via incipient wetness impregnation method results in agglomeration of metal particles outside CNTs. Methanol synthesis studies (523 K, 22.5 bar) were performed and activity study revealed that catalysts supported on treated CNTs achieved CO2 conversion of 19 %.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4968077