Ceria-titania doped highly ordered hexagonal and cubic mesoporous silica composite samples with varying amount of Ce and Ti have been synthesized by using hexadecyltrimethylammonium bromide (CTAB) surfactant as template under ammonia basic conditions. The removal of template resulted Ce-Ti-doped mesoporous composites which were thoroughly characterized by small-angle X-ray scattering (SAXS), wide-angle X-ray diffraction (WAXRD), adsorption, scanning and transmission electron microscopic analysis with energy-dispersive spectrometry mapping (SEM-TEM-EDS), inductive coupled plasma atomic emission spectrophotometry (ICP-AES), and ultraviolet visible diffuse reflectance spectrometry (UV-visible). The electronic states of Ti and Ce species which present on the silica surface were also investigated by X-ray photoelectron spectroscopy (XPS). The catalytic activity of these Ti-modified ceria-silica samples was evaluated for the photodecomposition of Rhodamine B under visible light irradiation. The results reveal the sample with higher Ti content as well as equal amount of Ce and Ti shows higher catalytic activity towards the photodegradation of the organic dye, Rhodamine B.

Ceria-titania rich mesoporous silica materials and its UV-visible photocatalytic activity of organic dye

254th National Meeting (2017)

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