In-situ synthesis of surfactant/silane modified hydrotalcites
Frost, Ray L., Zhu, Jianxi, He, Hongping, Yuan, Peng, Tao, Qi, Shen, Wei, & Bostrom, Thor E. (2008) In-situ synthesis of surfactant/silane modified hydrotalcites. Journal of Colloid and Interface Science, 319(2), 498 -504.
In this study, anionic surfactant and silane modified hydrotalcites were synthesized through a soft chemical in-situ method. The resulting materials were characterized using X-ray diffraction (XRD), high-resolution thermogravimetric analysis (HRTG), Fourier Transform Infrared spectroscopy (FTIR), Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM) and N2 adsorption-desorption. The Mg-Al hydrotalcite (LDH) and the only surfactant modified hydrotalcite (LDH-2) display similar XRD patterns while both surfactant and silane modified hydrotalcite (LDH-3) shows two distinct series of reflections, corresponding to hydrotalcite and smectite-like materials, respectively. The smectite-like materials shows a series of regular (001) reflections with d001=12.58 Å. Further supporting evidence was obtained from FTIR and TG, for example, the vibration at 1198 cm-1 corresponds to Si-O-Si stretching mode and the mass loss at ca. 861 oC to dehydroxylation. In LDH-2, the loaded surfactant are located in both the interlayer space and inter-particle pores with a “house of cards” structure as supported by FTIR, TG and N2 adsorption-desorption isotherms. Both electron microscopy (SEM and TEM) micrographs and N2 adsorption-desorption isotherms show that in-situ modification with surfactant and silane has a significant influence on the morphology and porous parameters of the resulting hydrotalcite materials.
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|Item Type:||Journal Article|
|Keywords:||Hydrotalcite, In, situ synthesis, Anionic surfactant, Silane, Nanochemistry|
|Subjects:||Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Colloid and Surface Chemistry (030603)
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Science and Technology|
|Copyright Owner:||Copyright 2008 Elsevier|
|Copyright Statement:||Reproduced in accordance with the copyright policy of the publisher.|
|Deposited On:||17 Apr 2008 00:00|
|Last Modified:||29 Feb 2012 13:49|
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