Preparation of a nanocomposite consisting of a siloxane network and perovskite-related nanosheets via a sol–gel process
A nanocomposite possessing perovskite-related nanosheets dispersed in a siloxane network was prepared by cohydrolysis of the n-decoxy derivative of an ion-exchangeable layered perovskite, HCa 2Nb 3O 10· xH 2O (HCaNb), and tetramethoxysilane (TMOS) via a sol–gel process involving exfoliation. In the...
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Veröffentlicht in: | Science and technology of advanced materials 2006-01, Vol.7 (5), p.446-450 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | A nanocomposite possessing perovskite-related nanosheets dispersed in a siloxane network was prepared by cohydrolysis of the
n-decoxy derivative of an ion-exchangeable layered perovskite, HCa
2Nb
3O
10·
xH
2O (HCaNb), and tetramethoxysilane (TMOS) via a sol–gel process involving exfoliation. In the X-ray diffraction (XRD) pattern of the product after drying for 1
d, the (0
0
l) reflections disappeared. The transmission electron microscopy (TEM) image of the product after drying for 1
d showed dark lines with a thickness of 1.5
nm, which was consistent with the thickness of an individual nanosheet, indicating exfoliation of HCaNb. In the XRD patterns of the reaction products of the
n-decoxy derivative of HCaNb and TMOS before drying and after drying for 60
min, (0
0
l) reflections were detected. After drying for 80
min, the intensity of the (0
0
l) reflections decreased. The intensity decreased with an increase in the drying time, indicating that the exfoliation of HCaNb occurred during the drying process. |
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ISSN: | 1468-6996 1878-5514 |
DOI: | 10.1016/j.stam.2006.05.002 |