Adsorption and Photocatalytic Degradation Studies of Methylene Blue on Sol –Gel Derived CdS -Ti MCM-41

We suggested a simple method for the synthesis of CdS modified Ti MCM-41 catalyst materials by sol- gel method and studied the calcined materials were well characterized by Powder X-ray Diffraction, Ultraviolet-Visible diffuse reflectance spectroscopic analysis, ATR FT-IR Spectroscopy, N₂ Sorption analysis and transmission Electron Microscopy. The powder X -ray diffraction data showed the presence of hexagonal phase CdS and variation in crystallinity of the material as we changed the composition of the materials. Upon increasing the amount of CdS concentration, the intensity of the spectra in the visible region also increased. From transmission electron microscopy analysis, noticed the presence of CdS nanoparticle along with TiO₂. The textural properties of CdS modified Ti MCM 41 was found to be lower than that of the parent Ti MCM41. Up on studying the photocatalytic activity of the material, CdS modified Ti MCM 41 showed lower photocatalystic activity under direct sunlight irradiation. This might be attributed to lower surface area, crystallinity, and visible light sensitivity of the CdS modified Ti MCM 41