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Direct synthesis of carbon nanofibers from South African coal fly ash

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Figure

Table 1 The chemical composition of South African coalfly ash samples obtained by XRF
Figure 1 As-received coal fly ash and synthesised CNFs. Images of as-received coal fly ash (a) and CNFs synthesized at (b) 400°C, (c) 500°C,(d) 600°C and (e, f) 700°C
Figure 3 Raman spectra and ID/IG ratios. (a) Laser Raman spectra of as-received coal fly ash and the products from fly ash exposed to acetyleneat various temperatures
Figure 4 The first-order weight derivatives of as-received and acetylene-treated coal fly ash at varying temperatures
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