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

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 CaCl 2 which contains the anionic surfactant alkyl p...

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Bibliographic Details
Published in:Materials letters 2007-11, Vol.61 (27), p.4937-4939
Main Authors: Guo, Feng, Li, Ying, Xu, Hong-Xia, Zhao, Guo-Qing, He, Xiu-Juan
Format: Article
Language:English
Subjects:
Foam film
Nanoparticles
Surfactant
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Summary: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 CaCl 2 which contains the anionic surfactant alkyl polyoxyethylene alcohol sulfate sodium (AES) and the other is formed by the aqueous solution of Na 2CO 3 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 Ca 2+ and CO 3 2− entrapped by the surfactant layers at the thin borders between the foam bubbles react and result in the generation of CaCO 3 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 CaCl 2 and Na 2CO 3. Also, the mechanism leading to the synthesis of CaCO 3 nanoparticles was discussed in detail.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2007.03.075