Phase and morphology evolution of vaterite crystals in water/ethanol binary solvent

✍ Scribed by Dalai Jin; Fei Wang; Linhai Yue

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 189 KB
• Volume: 46
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.201000484

✦ Synopsis

Abstract

Keeping stability is important for metastable vaterite to be applied. In this work, crystal evolution of vaterite in water/ethanol binary solvent (WEBS) was investigated. Phase identification was confirmed by XRD measurement. It is found that the stability of vaterite is sensitive to the concentration of surplus CO~3~^2‐^ and the ethanol mole fraction in WEBS. The vaterite phase would transform to either aragonite or calcite decided by the surplus CO~3~^2‐^ ions or Ca^2+^ ions, respectively. SEM observation shows that the polymorph evolution also induced the morphology change. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)