Size-controllable synthesis of calcium carbonate nanoparticles using aqueous foam films as templates

作者：Guo Feng; Li Ying^*; Xu Hong Xia; Zhao Guo Qing; He Xiu Juan

来源：Materials Letters, 2007, 61(27): 4937-4939.

DOI：10.1016/j.matlet.2007.03.075

• nanoparticles
• foam film
• surfactant

A new method for the synthesis of calcium carbonate nanoparticles using two types of foam which are separately stabilized by surfactants with opposite change has been described here. In detail, one type of foam is formed by the aqueous solution of CaCl2 which contains the anionic surfactant alkyl polyoxyethylene alcohol sulfate sodium (AES) and the other is formed by the aqueous solution of Na2Co3 and the cationic surfactant alkyl polyoxyethylene quaternary ammonium chloride (AEAC). Two types of foam contact each other in a specially designed apparatus after draining completely, then Ca2+ and CO32- entrapped by the surfactant layers at the thin borders between the foam bubbles react and result in the generation of CaCO3 nanoparticles. TEM determination showed that perfect mono-dispersed spherical nanoparticles were obtained and the size of particles can be conveniently controlled by changing the concentration of CaCl2 and Na2CO3. Also, the mechanism leading to the synthesis of CaCO3 nanoparticles was discussed in detail.

• 出版日期2007-11
• 单位山东大学