期刊
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
卷 18, 期 3, 页码 1958-1964出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2018.14208
关键词
Calcium Carbonate; Calcium Oxide; Calcium Oleate; Monodisperse Nanoparticles
类别
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [2014R1A2A1A11054122]
- National Research Foundation of Korea (NRF) - Ministry of Education [2012R1A1A2044157]
- Korea Ministry of Environment (MOE) as Public Technology Program based on Environmental Policy [2014000160001]
Calcium carbonate (CaCO3) and monodisperse calcium oxide nanoparticles (CaO NPs) are prepared by the calcination of solid-state calcium oleate precursor in air condition. The effect of calcination temperature on the synthesis of CaCO3 and CaO NPs is examined. The polymorphism is confirmed by X-ray diffraction spectroscopy (XRD), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). The sample morphologies including their size and size distribution are investigated by field emission scanning electron microscopy (FESEM). Calcination of calcium oleate between 400 and 550 degrees C results in CaCO3 NPs with mean sizes from 82 to 98 nm, whereas monodisperse spherical CaO NPs are obtained at 650 degrees C and an average size is estimated to be 40 nm. Beyond 650 degrees C, the size of CaO NPs increases with broad size distribution. The results of this study provide a novel approach to monodisperse CaCO3 and CaO NPs that can be applied in a variety of fundamental and industrial fields.
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