مشخصات پژوهش

Titanium based perovskite oxides suchlike ATiO3 are a type of considerable photocatalyst for the perfect photocatalytic degradation of poisonous pollutants [1]. On the other hand, among visible light photocatalysts, nitrogen-rich carbon nitride materials are excellent options for photocatalytic activity [2]. Therefore, we decided to synthesize of CoTiO3 and C3N5 and their nanocomposite. Cobalt titanate (CoTiO3) nanostructures were synthesized in the form of nanorods by hydrothermal method and calcined in 600 •C. C3N5 nanosheets also were synthesized by simple thermal treatment, then, CoTiO3/C3N5 nanocomposites were prepared by reflux method. The phase structure and crystalline properties of the synthesized samples was investigated using X-ray diffraction (XRD) technique. The morphology and optical properties of the synthesized materials were investigated by Field-Emission Scanning Electron Microscopy (FESEM), High-Resolution Transmission Electron Microscopy (HRTEM) and UV–Visible Diffused Reflectance Spectroscopy (UV-DRS). Also, the surface properties of materials were determined by adsorption-desorption isotherms of N2 gas. Photocatalytic measurements of CoTiO3 and CoTiO3/C3N5 photocatalyst were evaluated towards the degradation of methylene blue (MB) as a model coloring organic pollutant, and tetracycline hydrochloride (TC) as a model antibiotic, under simulated visible light illumination. The results showed that CoTiO3/C3N5 (1:3 wt%) was the best photocatalyst, with the complete MB (10mg L_1) and TC (100ppm) degradation efficiency within 60 min of radiation compared with pristine CoTiO3 nanorods and C3N5 nanosheets.