Preparation and characterization of multiwalled carbon nanotube/In₂O₃ composites
2013
Berki, Péter | Németh, Zoltán | Réti, Balázs | Berkesi, Ottó | Magrez, Arnaud | Aroutiounian, Vladimir | Forró, L. (László) | Hernadi, Klara
We have prepared multiwalled carbon nanotube (MWCNT)/In₂O₃ composites using a simple impregnation method. The precursor compound indium(III) chloride (InCl₃) was used to cover the surface of MWCNTs and distilled water was used as solvent. The applied mass ratio was 4:1 (In₂O₃/MWCNT), and during the calcination process different temperatures (300, 350 and 400°C) were investigated. The produced materials were characterized by X-ray diffraction, energy-dispersive X-ray spectroscopy, Raman spectroscopy, Fourier transform infrared spectroscopy, transmission and scanning electron microscopy, and a thermogravimetric analysis was executed also. The average thickness of the produced surface layer and the average sizes of the In₂O₃ particles were calculated with the Scherrer formula and the ImageJ-program. The results show that the heat treatment temperature affected the characteristic morphology and the crystal structure of the as-prepared composite. These multiwalled carbon nanotube-based composites are promising candidates as gas sensors and catalyst.
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