Synthesis and characterization of dye-doped TiO2-SiO2 core-shell composite microspheres

Naresh Dhiman; Arvind Kumar; Bhanu P. Singh

doi:10.1117/1.JNP.6.063511

2 July 2012 Synthesis and characterization of dye-doped TiO₂-SiO₂ core-shell composite microspheres

Naresh Dhiman, Arvind Kumar, Bhanu P. Singh

Author Affiliations +

Journal of Nanophotonics, Vol. 6, Issue 1, 063511 (July 2012). https://doi.org/10.1117/1.JNP.6.063511

Abstract

RhodamineB (RB) dye-doped TiO₂-SiO₂ core-shell composite microspheres were synthesized by a chemical method from the hydrolysis of the titanium tetrachloride (TiCl₄). The morphology and chemical bonding information of composite material was investigated by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). TEM and SEM images illustrate that core-shell composite microspheres are spherical in shape and have a nano-range thin coating of TiO₂ on the surface of SiO₂. The core-shell composite microspheres calcined at 400°C exhibit sharp XRD peaks of anatase and rutile crystalline phases of TiO₂. The unit cell parameters were calculated from different peaks. The FTIR spectrum confirms the existence of stretching modes (Si-O-Si and Ti-O-Ti) in the core-shell composite microspheres. The photocatalytic properties were evaluated by the photo degradation of K₂Cr₂O₇ under ultraviolet-visible irradiation for as-synthesized and at an 850°C calcination temperature of the core-shell composite.

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Naresh Dhiman, Arvind Kumar, and Bhanu P. Singh "Synthesis and characterization of dye-doped TiO₂-SiO₂ core-shell composite microspheres," Journal of Nanophotonics 6(1), 063511 (2 July 2012). https://doi.org/10.1117/1.JNP.6.063511

Published: 2 July 2012

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