4.4 Article

Bicontinuous nanodisc and nanospherical titania materials prepared by sol-gel process in reverse microemulsion

期刊

CHEMICAL PAPERS
卷 66, 期 3, 页码 202-210

出版社

VERSITA
DOI: 10.2478/s11696-011-0130-2

关键词

sol-gel; microemulsion; nanodiscs; nanospheres; mesoporous

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TiO(2) 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 TiO(2) particles. The effect of W (0) on the anatase-rutile phase transition temperature was investigated.

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