Facile and controllable synthesis of carbon-encapsulating carbonate apatite nanowires from biomass containing calcium compounds such as CaC2O4 and CaCO3

Jeong, Namjo; Han, Seong Ok; Kim, Heeyeon; Hwang, Kyo-Sik; Yang, SeungCheol; Kim, Kahee; Hong, Sungkook

doi:10.1039/c4ra08735f

Cited by 2 publications

(1 citation statement)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…17 The main peaks at 23.1°, 29.4°, 36.1°, 39.4°, 43.1°, 47.5°, 48.5°, 56.5°, and 57.4°were assigned to (012), (104), ( 110), ( 113), ( 202), (018), ( 116), (122), and (214) reflections, respectively. In the previous study, 18 we found that the calcite-phased CaCO 3 (eggshell) was converted into CaO without the supply of H 2 into the reactor. The formation of Ca(OH) 2 following synthesis with 10 vol % H 2 in Ar was remarkable.…”

Section: Resultsmentioning

confidence: 99%

Direct Growth of Graphitic Carbon-Encapsulating Carbonate Apatite Nanowires from Calcium Carbonate

Jeong¹,

Park²,

Jang³

et al. 2018

Crystal Growth & Design

Self Cite

View full text Add to dashboard Cite

We report the direct chemical vapor deposition of graphitic carbon-encapsulating carbonate apatite nanowires (GCECANs)/hexagonal portlandite-phased Ca(OH)2 hybrid structures from CaCO3 powder at 900 °C. The formation mechanism of the GCECANs is investigated in detail through a structural and morphological characterization of the final products. Spectroscopic analyses elucidate the effect of H2 concentration in the reactor on the transformation of the calcite-phased CaCO3 into vaterite-phased CaCO3 and subsequently portlandite-phased Ca(OH)2. The results show that GCECANs are formed on the surface of the derived Ca(OH)2. It is especially remarkable that a higher H2 concentration results in the precipitated growth of such hybrid structures. Microscopic images show that GCECANs 20 nm in diameter grew up to 3 μm in length along the direction corresponding to the [001] plane of the hexagonal apatite crystal. In addition, the electrical properties of the GCECANs are measured by using an electrode with 150 nm gap.

show abstract

Section: Resultsmentioning

confidence: 99%