Synthesis of Carbon Nanotubes from Industrial Wastes Following Alkali Activation and Film Casting Method

Abstract

In the present study, synthesis, and characterization of carbon nanotubes (CNTs) has been carried out using fly ash, red mud, and rock sample as raw and filler material. The feed stock was used for the fabrication of bio-composite films of polyvinyl alcohol. Pyrolysis of bio-composite film produced by aqueous casting method was performed at 500 °C. The increment in particle size of the modified samples was analysed using laser particle size analyser. Oxide based composition and elemental analysis of the samples was reported using XRF. The comparison between crystalline phase and various organic and inorganic bonds present before and after modification were analysed using XRD and FTIR, respectively. The resultant carbon nanotubes were analysed for structural, morphological, and thermal stability using FESEM, TEM, Raman spectroscopy, and thermogravimetric analysis. Total pore volume, specific surface area, and the respective pore size distribution of the carbon nanotube mixture were analysed through BET analysis. Magnetic character of synthesized CNTs was analysed by using vibrating sample magnetometer. The obtained results from different characterization techniques shows successful preparation of CNTs with superior magnetic properties.