Synthesis of nanosized calcium hydroxyapatite particles by the catalytic decomposition of urea with urease
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2007
Authors
Jokić, BojanTanasković, Dušanka
Janković-Častvan, Ivona
Drmanić, Saša
Petrović, Rada
Janaćković, Đorđe
Article (Published version)
Metadata
Show full item recordAbstract
Nanosized calcium hydroxyapatite particles were synthesized by the catalytic decomposition of urea with urease. The influence of the synthesis parameters, i.e., temperature and ratio of the reagents/urease concentrations, on the size and morphology of the hydroxyapatite particles were investigated. As reagents for the synthesis of hydroxyapatite, various amounts of CaCl2, NaH2PO4, urea, and urease were used. The urease-catalyzed decomposition of urea leads to the homogeneous precipitation of hydroxyapatite because of the release of OH- ions during the hydrolysis of urea. In the same process, CO32- ions are also released and incorporated into the crystal structure of the hydroxyapatite. In the temperature range from 30-40 degrees C, it was found that low crystalline carbonate hydroxyapatite was formed in all cases. It was found that decreasing the ratio of the concentrations of the reagents to the urease concentration leads to decrease in the particle size to below 100 nm and the morpho...logy changes from leafy-like to spherical.
Source:
Journal of Materials Research, 2007, 22, 5, 1156-1161Publisher:
- Cambridge Univ Press, New York
Funding / projects:
- Sinteza, struktura, svojstva i primena funkcionalnih nanostrukturnih keramičkih i biokeramičkih materijala (RS-MESTD-MPN2006-2010-142070)
DOI: 10.1557/JMR.2007.0170
ISSN: 0884-2914
WoS: 000246258300005
Scopus: 2-s2.0-34250208704
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Jokić, Bojan AU - Tanasković, Dušanka AU - Janković-Častvan, Ivona AU - Drmanić, Saša AU - Petrović, Rada AU - Janaćković, Đorđe PY - 2007 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1090 AB - Nanosized calcium hydroxyapatite particles were synthesized by the catalytic decomposition of urea with urease. The influence of the synthesis parameters, i.e., temperature and ratio of the reagents/urease concentrations, on the size and morphology of the hydroxyapatite particles were investigated. As reagents for the synthesis of hydroxyapatite, various amounts of CaCl2, NaH2PO4, urea, and urease were used. The urease-catalyzed decomposition of urea leads to the homogeneous precipitation of hydroxyapatite because of the release of OH- ions during the hydrolysis of urea. In the same process, CO32- ions are also released and incorporated into the crystal structure of the hydroxyapatite. In the temperature range from 30-40 degrees C, it was found that low crystalline carbonate hydroxyapatite was formed in all cases. It was found that decreasing the ratio of the concentrations of the reagents to the urease concentration leads to decrease in the particle size to below 100 nm and the morphology changes from leafy-like to spherical. PB - Cambridge Univ Press, New York T2 - Journal of Materials Research T1 - Synthesis of nanosized calcium hydroxyapatite particles by the catalytic decomposition of urea with urease EP - 1161 IS - 5 SP - 1156 VL - 22 DO - 10.1557/JMR.2007.0170 ER -
@article{ author = "Jokić, Bojan and Tanasković, Dušanka and Janković-Častvan, Ivona and Drmanić, Saša and Petrović, Rada and Janaćković, Đorđe", year = "2007", abstract = "Nanosized calcium hydroxyapatite particles were synthesized by the catalytic decomposition of urea with urease. The influence of the synthesis parameters, i.e., temperature and ratio of the reagents/urease concentrations, on the size and morphology of the hydroxyapatite particles were investigated. As reagents for the synthesis of hydroxyapatite, various amounts of CaCl2, NaH2PO4, urea, and urease were used. The urease-catalyzed decomposition of urea leads to the homogeneous precipitation of hydroxyapatite because of the release of OH- ions during the hydrolysis of urea. In the same process, CO32- ions are also released and incorporated into the crystal structure of the hydroxyapatite. In the temperature range from 30-40 degrees C, it was found that low crystalline carbonate hydroxyapatite was formed in all cases. It was found that decreasing the ratio of the concentrations of the reagents to the urease concentration leads to decrease in the particle size to below 100 nm and the morphology changes from leafy-like to spherical.", publisher = "Cambridge Univ Press, New York", journal = "Journal of Materials Research", title = "Synthesis of nanosized calcium hydroxyapatite particles by the catalytic decomposition of urea with urease", pages = "1161-1156", number = "5", volume = "22", doi = "10.1557/JMR.2007.0170" }
Jokić, B., Tanasković, D., Janković-Častvan, I., Drmanić, S., Petrović, R.,& Janaćković, Đ.. (2007). Synthesis of nanosized calcium hydroxyapatite particles by the catalytic decomposition of urea with urease. in Journal of Materials Research Cambridge Univ Press, New York., 22(5), 1156-1161. https://doi.org/10.1557/JMR.2007.0170
Jokić B, Tanasković D, Janković-Častvan I, Drmanić S, Petrović R, Janaćković Đ. Synthesis of nanosized calcium hydroxyapatite particles by the catalytic decomposition of urea with urease. in Journal of Materials Research. 2007;22(5):1156-1161. doi:10.1557/JMR.2007.0170 .
Jokić, Bojan, Tanasković, Dušanka, Janković-Častvan, Ivona, Drmanić, Saša, Petrović, Rada, Janaćković, Đorđe, "Synthesis of nanosized calcium hydroxyapatite particles by the catalytic decomposition of urea with urease" in Journal of Materials Research, 22, no. 5 (2007):1156-1161, https://doi.org/10.1557/JMR.2007.0170 . .