Direct synthesis of hollow vaterite nanospheres from amorphous calcium carbonate nanoparticles via phase transformation
SCIE
SCOPUS
- Title
- Direct synthesis of hollow vaterite nanospheres from amorphous calcium carbonate nanoparticles via phase transformation
- Authors
- Cai, AH; Xu, XR; Pan, HH; Tao, JH; Liu, R; Tang, RK; Cho, K
- Date Issued
- 2008-07-31
- Publisher
- AMER CHEMICAL SOC
- Abstract
- A new and simple method for preparation of hollow calcium carbonate nanospheres under mild conditions is developed. Hollow vaterite nanospheres are achieved by water-induced phase transformation of poly(4-sodium styrene sulfonate)-stabilized amorphous calcium carbonate (PSS-ACC) in water-ethanol solution at room temperature. It is found that the sizes of the resulting hollow-structured nanospheres can be easily regulated by the content of PSS and the phase transformation can be greatly affected by the ratio of water to ethanol in the mixed solvent. A combination effect of PSS and water is emphasized in this formation process. It is important to control the amounts of PSS and water in the experiments so that a large scale of hollow vaterite nanospheres with different sizes can be achieved. We suggest that the PSS-ACC particles use themselves as the templates to form the new crystallized shells, and its mechanism is also discussed.
- Keywords
- REVERSE MICROEMULSIONS; POLYELECTROLYTE; BIOMINERALIZATION; SUPERSTRUCTURES; MESOCRYSTALS; FABRICATION; PARTICLES; CRYSTALS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/22619
- DOI
- 10.1021/JP801408K
- ISSN
- 1932-7447
- Article Type
- Article
- Citation
- JOURNAL OF PHYSICAL CHEMISTRY C, vol. 112, no. 30, page. 11324 - 11330, 2008-07-31
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