Figure 1: Structural and elemental analysis of CNFs. | Nature Communications

Figure 1: Structural and elemental analysis of CNFs.

From: Renewable and metal-free carbon nanofibre catalysts for carbon dioxide reduction

Figure 1

(a) Digital image of CNF mat used as catalyst, (b) SEM image of the CNF mat displaying entangled fibres (scale bar, 5 μm), (c) high-resolution SEM image on individual fibres (scale bar, 200 nm). Random corrugations are visible at the fibre surface. (d) Atomic force microscopic image (height profile) of fibre (scale bar, 500 nm) and corresponding cross-sectional (e) and axial (f) height distributions, respectively. The fibre diameter is ~500 nm and the height of nanocorrugations at the surface varies between 10 and 25 nm. (g) High-resolution TEM image (scale bar, 5 nm) of the edge of the fibre surface and selected area electron diffraction pattern (scale bar, 10 cm) displaying disordered arrangement of crystals. (h) Two important bands in the Raman spectra (that is, D band and G band) appear at 1,363 and 1,586 cm−1. (i) Deconvoluted C1s XPS peak confirms the presence of graphitic carbon and nitrogen atoms in CNFs.

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