Preparation Uniform Thin Tubular Carbon Nanofiber Using Novel Bimetallic Catalyst at Low Temperature and Its Structural Feature.

ABSTRACT: Uniform thin tubular carbon nanofibers (TCNFs), composed of two nanofibrils ca. 20 nm in diameter and with relatively high graphitic property, were prepared using a chemical deposition method from a CO/H₂ gas mix (1:4 v/v) over a novel bimetallic (Fe-Mn, 3:7 w/w) catalyst at a low temperature of 500-540 °C. Mn effectively activated the Fe catalyst when preparing selective thin TCNFs. The specific amount of Mn 70 wt % on the Fe-Mn catalyst was key for the selective preparation of uniform duplicated CNFs with an aligned tubular graphene structure. The obtained TCNFs had relatively high graphitic property; the interlayer spacing (d ₀₀₂) and the stacking height Lc(002) were <0.3420 and >5.4 nm, respectively, because of the unique duplicated morphology.

SUBMITTER: Sung M 

PROVIDER: S-EPMC12423864 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature