Controlled production of carbon nanofibers over cement clinker via oxidative dehydrogenation of acetylene by intrinsic carbon dioxide

Warakulwit, Chompunuch; Yadnum, Sudarat; Paluka, Veerachart; Phuakkong, Oranit; Niamlaem, Malinee; Pongpaisanseree, Kittisak; Sinthupinyo, Sakprayut; Limtrakul, Jumras

doi:10.1016/j.cej.2014.11.028

Cited by 8 publications

(2 citation statements)

References 29 publications

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“…The D band (at approximately 1300 cm −1 ) is attributed to the defects in the graphite, and the G band (at approximately 1580 cm −1 ) is attributed to the normal graphite [28]. These results demonstrate that graphite grows in situ on the Portland cement clinker, which is accordant with these reports [29,30]. In this process of treatment, C 2 H 2 is decomposed to produce precursors [30], which then grow into carbon materials as shown in the equation (1) [15,[30][31][32].…”

Section: 3supporting

confidence: 88%

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Study of the in-situ growth of carbon nanofibers on cement clinker

Cao

et al. 2020

Mater. Res. Express

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Because fibres are difficult to disperse evenly in cement-based materials, we attempted to grow carbon nanofibers (CNFs) in situ on Portland cement clinker particles using chemical vapor deposition (CVD). The results show that the phase compositions and alite polymorph didn't change for the Portland cement clinker treated at 600°C in the atmosphere of blended gas containing argon (Ar), hydrogen (H 2 ) and acetylene (C 2 H 2 ). The CNFs was successfully grown in situ on the Portland cement clinker due to the reaction of C 2 H 2 in the presence of H 2 . The diameter and length of the CNFs were 20-30 nm and 0.6-0.9 μm respectively. C 3 S is the main component of cement clinker. The hydration of C 3 S plays a crucial role in the performance of cementitious composites. The hydration of C 3 S was significantly delayed and reduced due to the incorporation of CNFs.

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Section: 3supporting

confidence: 88%

“…This result was verified further by TG analysis (figure 8). The major weight loss between approximately 400°C and 550°C are attributed to the oxidation reaction of amorphous carbon and CNFs [29,35]. In all the investigated samples, sample C2 has the highest weight loss.…”

Section: 3mentioning

confidence: 95%