The role of steam treatment on the structure, purity and length distribution of multi-walled carbon nanotubes
Kepić, Dejan P.
Tendeloo, Gustaaf Van
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Purification and shortening of carbon nanotubes have attracted a great deal of attention to increase the biocompatibility and performance of the material in several applications. Steam treatment has been employed to afford both purification and shortening of multi-walled carbon nanotubes (MWCNTs). Steam removes the amorphous carbon and the graphitic particles that sheath catalytic nanoparticles, facilitating their removal by a subsequent acidic wash. The amount of metal impurities can be reduced in this manner below 0.01 wt.%. The length distribution of MWCNTs after different steam treatment times (from 1 h to 15 h) was assessed by box plot analysis of the electron microscopy data. Samples with a median length of 0.57 mu m have been prepared with the reported methodology while preserving the integrity of the tubular wall structure. (C) 2015 Elsevier Ltd. All rights reserved.
Извор:Carbon, 2015, 93, 1059-1067
- ESTEEM 2 - Enabling Science and Technology through European Electron Microscopy (EU-312483)
- RADDEL - Nanocapsules for targeted delivery of radioactivity (EU-290023)
- MINECO [MAT2014-53500-R], Ministry of Education, Science and Technological Development of Republic of Serbia