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Ultrasound-assisted reconstruction and delamination studies on CaAl layered double hydroxides
Abstract Two kinds of CaAl layered double hydroxides (CaAl-LDHs) were synthesized with chloride and nitrate anions by co-precipitation method. The samples were calcined and finally reconstructed by rehydration using ultrasounds, in the presence of NaCl or NaNO3. Reconstructed samples presented smaller lamella size than the parent ones. All samples were characterized by X-ray powder diffraction, FT-IR spectroscopy, thermogravimetric analysis and TEM microscopy. Delamination was not achieved by mechanical stirring for 2days, whereas most samples underwent delamination by the use of ultrasounds. Additionally, a hybrid CaAl-LDHs with CdTe quantum dots was synthesized by reconstruction of a calcined CaAl-LDHs in the presence of the quantum dots.
Graphical abstract Display Omitted
Highlights Calcined CaAl layered double hydroxides were reconstructed using ultrasounds. During the reconstruction there was a preference for chloride anion incorporation. Sample's delamination was not achieved using stirring for 2days and formamide. Most samples underwent delamination using ultrasounds and formamide. A sample was reconstructed in the presence of CdTe quantum dots.
Ultrasound-assisted reconstruction and delamination studies on CaAl layered double hydroxides
Abstract Two kinds of CaAl layered double hydroxides (CaAl-LDHs) were synthesized with chloride and nitrate anions by co-precipitation method. The samples were calcined and finally reconstructed by rehydration using ultrasounds, in the presence of NaCl or NaNO3. Reconstructed samples presented smaller lamella size than the parent ones. All samples were characterized by X-ray powder diffraction, FT-IR spectroscopy, thermogravimetric analysis and TEM microscopy. Delamination was not achieved by mechanical stirring for 2days, whereas most samples underwent delamination by the use of ultrasounds. Additionally, a hybrid CaAl-LDHs with CdTe quantum dots was synthesized by reconstruction of a calcined CaAl-LDHs in the presence of the quantum dots.
Graphical abstract Display Omitted
Highlights Calcined CaAl layered double hydroxides were reconstructed using ultrasounds. During the reconstruction there was a preference for chloride anion incorporation. Sample's delamination was not achieved using stirring for 2days and formamide. Most samples underwent delamination using ultrasounds and formamide. A sample was reconstructed in the presence of CdTe quantum dots.
Ultrasound-assisted reconstruction and delamination studies on CaAl layered double hydroxides
Pérez-Barrado, Elena (Autor:in) / Salagre, Pilar (Autor:in) / Marsal, Lluís F. (Autor:in) / Aguiló, Magdalena (Autor:in) / Cesteros, Yolanda (Autor:in) / Díaz, Francesc (Autor:in) / Pallarès, Josep (Autor:in) / Cucinotta, Fabio (Autor:in) / Marchese, Leonardo (Autor:in) / Pujol, Maria Cinta (Autor:in)
Applied Clay Science ; 118 ; 116-123
31.08.2015
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Ultrasound-assisted reconstruction and delamination studies on CaAl layered double hydroxides
| Online Contents | 2015