Papers by Keyword: SnO₂/MWCNTs

Abstract: A simple approach to the in situ deposition of well-crystallized SnO₂ nanocrystals on the surface of multiwalled carbon nanotubes (MWCNTs) in the ethanol solution system of SnCl2 was presented in this paper. The well-crystallized SnO₂ nanocrystals with small and uniform crystal size (4~5 nm) can be tightly and homogenously coated on the outside surface of the MWCNTs entirely. The prepared nanocomposites were characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and nitrogen BET measurements. It is found that the hydrothermal reaction plays an important role for the crystal growth of the SnO₂ nanocrystals on the surface of MWCNTs, and the crystallinity of the SnO₂ nanocrystals can be controlled by varying the pH value or the hydrothermal reaction time. It is found that a unique structure of leaf-like SnO₂ nanosheets hanging on the MWCNTs was obtained when using water as the solvent of SnCl₂ instead of ethanol. The gas sensing performance of the SnO₂/MWCNTs nanocomposites was also investigated.