Preparation of CdS-TiO2/Rectorite Nanocomposite and Its Photocatalytic Property

CdS-TiO2/rectorite nanocomposite was obtained through in-situ intercalation-exfoliation process of CdS-TiO2. The microstructures and properties of the CdS-TiO2/rectorite were characterized by means of X-ray powder diffraction(XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), diffuse reflectance absorbance spectroscopy(DRS) and nitrogen adsorption-desorption measurement. The adsorption and photocatalytic properties of rectorite, TiO2/rectorite and CdS-TiO2/rectorite nanocomposites were comparatively investigated by Rhodamine B(RB) as simulated organic pollutant. The experimental results show that the CdS-TiO2/rectorite nanocomposite exhibits more complicated porous structure, larger pore volume, specific surface area and more effective optical absorptivity, and therefore stronger adsorption ability and higher photocatalytic degradation activity as compared to the rectorite. The above results show a promising route for the application of the rare mineral rectroite.