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Abstract
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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.
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