Synthesis and characterisation of clay-supported titania photocatalysts

This study examines the use of laponite, a synthetic smectite, which forms exfoliated silicate layers when dispersed in water, as an inorganic support for titania nanocrystals. Titania nanocrystals are prepared prior to addition to the clay dispersion, by a sol–gel synthesis incorporating a microwave hydrothermal step. The characteristics of the resultant structure such as titania phase, crystallite size, and particulate size are examined via X-ray diffraction (XRD), transmission electron spectroscopy (TEM), and infrared spectroscopy.

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