A novel purification method of activated carbon-supported carbon nanotubes using a mixture of Ca(OH)₂ and KOH as the ablation agent.

ABSTRACT: Transition metals (Fe, Co, Ni) supported on activated carbons with different pore diameters (<2 nm, 10 nm, 50 nm) to synthesize carbon nanotubes (CNTS) are first investigated in this study. Through several characteristic analyses, Ni supported on 50 nm activated carbon is verified to be the most efficient catalyst among the samples for CNT growth. The optimum conditions for CNT growth are at a growth temperature of 750 °C with a reaction time of 45 min. Furthermore, a novel purification method for CNTs is proposed, in which KOH and Ca(OH)₂ powder are pre-mixed with the crude CNTs and CO₂ and N₂ gas are introduced into this mixture. When KOH and Ca(OH)₂ powder are used at a ratio of 2 : 1 under the atmosphere of CO₂ and N₂ at

SUBMITTER: Hu Y 

PROVIDER: S-EPMC8693427 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature