Abstract
In the present study, a dual functional nanostructured Fe2O3@TiO2 pigment, known as a cool pigment, is presented owning photocatalytic properties and NIR reflection. The Fe2O3@TiO2 nano pigments were prepared with different proportions of Fe2O3/TiO2 at 0.06, 0.62 and 1.24. Fe3+ precursors were used to producing Fe2O3 nanoparticles via co-precipitation method and coated with TiO2 using the sol-gel method. The synthesized pigments were specified by XRD, SEM, TEM, FTIR, BET, LC-MS, Ultraviolet–visible Spectroscopy, Near Infrared Reflectance and Photoluminescence Spectroscopy techniques. The photocatalytic properties of the synthesized nanocomposites were appraised by analyzing the degradation of acid red18 and reactive black 5 under UV irradiation. The results showed that the crystallization of Fe2O3 and TiO2 highly enhances NIR reflectance. Fe2O3/TiO2 content also showed effective role on the band gap of the nanocomposite, catalytic property, and NIR reflection. An enhanced photoactivity along with the highest NIR reflectance (73%) demonstrated for Fe2O3@TiO2 with Fe2O3/TiO2 = 0.06 compared to other supported Fe2O3. Furthermore, the brownish color of such pigments suggests that it could be a suitable candidate for cool color coating.
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