|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Functional Nanomaterials: Functional Low-Dimensional (0D, 1D, 2D) Materials 2022
||NOW ON-DEMAND ONLY – Salt Treatment to Purify Carbon Nanotube Sheets Produced via the Floating Catalyst CVD Method
||Anuptha Pujari, Arun J Bhattacharjee, Ashley E Paz y Puente, Mark Schulz
|On-Site Speaker (Planned)
The floating catalyst CVD method is a synthesis technique to produce macroscopic CNT sheets. This method uses a catalyst that is mixed with alcohol fuel along with other carbon precursors, thereby eliminating the use of a substrate to grow the CNTs. Although this method produces high yields of macroscopic CNT sheets, large amounts of undesired residual metallic catalyst particles are entrapped within the CNT sheets. Here, we have performed a novel salt treatment of the CNT sheets to remove the residual catalyst particles using NH4Cl. A kinetic study of the removal of metallic particles was performed for 10, 20, and 30 mins. Characterization of the salt-treated and as-synthesized CNT sheets was performed using electron microscopy, raman spectroscopy and 4-point probe. The characterization results revealed a strong correlation between the amount of residual materials (metallic particles and amorphous carbon) removed and processing time.