Conventional wet impregnation versus microwave-assisted synthesis of SnO2/CNT composites |
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| Authors: | Sarah Motshekga Sreejarani K. Pillai Suprakas S. Ray |
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| Affiliation: | (1) DST/CSIR Nanotechnology Innovation Centre, National Centre for Nano-Structured Materials, Council for Scientific and Industrial Research, Pretoria, 0001, Republic of South Africa;(2) Department of Chemical and Metallurgical Engineering, Tshwane University of Technology, Pretoria, 0001, Republic of South Africa;(3) Department of Chemistry, Faculty of Natural and Agricultural Sciences, University of the Free State (Qwaqwa Campus), Phuthaditjhaba 9866, Republic of South Africa; |
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| Abstract: | Carbon nanotubes decorated with SnO2 nanoparticles were prepared by conventional and microwave-assisted wet impregnation. The composites were thoroughly characterized by X-ray diffraction, Raman spectroscopy, BET-surface area measurement, Scanning and transmission electron microscopy. The XRD studies revealed the formation of tetragonal phase of SnO2. The microwave method produced CNTs heavily decorated with SnO2 nanoparticles with average size 5 nm in a total reaction time of 10 min because of the rapid volumetric heating. DC conductivity increased significantly for the nanocomposite samples when compared with the pure CNTs. In electrical conductivity properties, sample prepared by microwave method was found to be superior to the one prepared by conventional procedure due to homogeneous distribution of nanoparticles. |
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