Bicontinuous nanodisc and nanospherical titania materials prepared by sol-gel process in reverse microemulsion |
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Authors: | Khaled Haouemi Fathi Touati Néji Gharbi |
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Affiliation: | 1.Chemistry Laboratory of Condensed Materials,Preparatory Institute of Engineering School of Tunis,Tunis,Tunisia;2.National Institute for Research and Analysis Physico-Chemical,Sidi Thabet, Ariana,Tunisia |
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Abstract: | TiO2 nanoparticles with different shapes and sizes were synthesised by the sol-gel route in Water/Brij78/Hexane reverse microemulsions. The aqueous cores of these microemulsions were used as nanoreactors to control sol-gel reactions. We studied the effect of water/surfactant mole ratio (W 0) on the morphology, and textural properties of the final products. The materials thus obtained were characterised by different techniques. Thermogravimetric and differential thermal analysis (TG-DTA) was used to study the thermal behaviour of the products and X-ray diffraction (XRD) to identify the crystalline phases. The morphological and textural properties of the products were determined by scattering electron microscopy (SEM) and the Brunauer-Emmett-Teller (BET) method, respectively. We also studied the influence of thermal treatment on the structure and size of the TiO2 particles. The effect of W 0 on the anatase-rutile phase transition temperature was investigated. |
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