@article { author = {Krishnia, Lucky and Kumari, Reetu and Kumar, Vinay and Singh, Anshika and Garg, Preeti and S. Yadav, Brajesh and K. Tyagi, Pawan}, title = {Comparative Study Of Thermal Stability Of Filled And Un-filled Multiwalled Carbon Nanotubes  }, journal = {Advanced Materials Letters}, volume = {7}, number = {3}, pages = {230-234}, year = {2016}, publisher = {International Association of Advanced Materials}, issn = {0976-3961}, eissn = {0976-397X}, doi = {10.5185/amlett.2016.6149}, abstract = {Filled or un-filled multiwalled carbon nanotubes (CNTs) used in this study have been synthesized by the floating catalyst method and fixed catalyst method, respectively. The thermal stability of filled/un-filled carbon nanotubes has been investigated by using Thermogravimetric analysis (TGA) and Derivative thermogravimetric (DTG) analysis. In this report, we have developed a methodology to distinguish between filled and un-filled carbon nanotubes. Filled-CNTs are found to be more resistant to oxidation than the un-filled carbon nanotubes. The calculated activation energy of as-grown filled CNTs, by using differential method, determined to be 3.29 ± 0.04 eV, which is higher than that of highly ordered pyrolytic graphite (HOPG). Carboneous impurities; amorphous carbon, catalyst and CNT of different diameter, which are structurally different, are identified by their reactivity and the resistance to oxidation.  }, keywords = {Carbon nanotubes,Thermogravimetric analysis,derivative thermogravimetric analysis,highly ordered pyrolytic graphite.&nbsp}, url = {https://aml.iaamonline.org/article_14825.html}, eprint = {https://aml.iaamonline.org/article_14825_ae396c324940307e3f57ca1d0706e7f2.pdf} }