A rapid, green and versatile route to synthesize metal carbonate superstructures via the combination of regenerated silk fibroin and compressed CO2
Autor: | Shengjie Xu, Peiyi Wu |
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Rok vydání: | 2014 |
Předmět: |
Superstructure
Materials science Morphology (linguistics) Nanostructure Stacking Fibroin Nanotechnology General Chemistry Condensed Matter Physics law.invention chemistry.chemical_compound chemistry Chemical engineering law Carbonate General Materials Science Crystallization Fourier transform infrared spectroscopy |
Zdroj: | CrystEngComm. 16:1311-1321 |
ISSN: | 1466-8033 |
Popis: | In this work, a series of metal carbonate minerals such as BaCO3, SrCO3, MnCO3, PbCO3 and CdCO3 with uniform and well-defined morphology were synthesized via the combination of regenerated silk fibroin (RSF) and compressed CO2. The as-prepared samples were systemically characterized by means of TEM, SEM, XRD, TGA and FTIR. The results showed the size, morphology, and nanostructure of crystals could be well controlled by altering the RSF concentration and crystallization time. Based on the time-resolved experiments, we found a spherical BaCO3 superstructure was formed by RSF chains induced stacking of needle-like units, following a “rod-to-dumbbell-to-twined sphere-to-sphere” morphological evolution process. In addition, both amorphous phase and a dissolution–recrystallization process of BaCO3 were observed in crystallization. Finally, a probable crystallization mechanism for the formation of spherical BaCO3 aggregates was proposed based on the experiments. |
Databáze: | OpenAIRE |
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