A Green, Simple Chemical Route for the Synthesis of Pure Nanocalcite Crystals

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• 作者：Ahmed Barhoum ; Guy Van Assche ; Abdel Salam Hamdy Makhlouf ; Herman Terryn ; Kitty Baert ; Marie-Paule Delplancke ; Said M. El-Sheikh ; Hubert Rahier
• 刊名：Crystal Growth & Design
• 出版年：2015
• 出版时间：February 4, 2015
• 年：2015
• 卷：15
• 期：2
• 页码：573-580
• 全文大小：505K
• ISSN：1528-7505

文摘

A new, simple chemical route was developed for the synthesis of pure nanocalcite crystals by controlling the reaction of an aqueous solution of CaO and CO₂ gas. Results revealed formation of well-defined and pure nanocalcite crystals with controlled crystallite and particle size, without additives or organic solvents. The crystallite and particle size can be controlled, and smaller sizes are obtained by decreasing the CaO concentration and increasing the CO₂ flow rate. The decrease of crystallite and particle size below a certain threshold provides the nanocalcite crystal signature characteristics that can be clearly observed in XRD patterns, TEM images, FTIR spectra, Raman spectra, XPS spectra, and thermal stability measurements.