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Abstract
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Titanium-based perovskite oxides are the promising photocatalysts for an efficient degradation of organic pollutants.
However, charge carriers recombination and wide band gap energy are still the main challenges in their
visible-light-driven photocatalytic applications of Titanate perovskites, ATiO3. The immobilization of Titaniumbased
perovskites on a carbonaceous substrate such as nitrogen-rich carbon nitride, can be considered as an
excellent option for enhancing photocatalytic performance. Here, the CoTiO3/C3N5 nanocomposite was synthesized
by simple reflux method and used for photocatalytic degradation of three organic pollutants including
methylene blue (MB), tetracycline hydrochloride (TC), and bisphenol A (BPA). The results indicated that the
photocatalytic activity of the CoTiO3 perovskite was considerably improved by introducing C3N5 nanosheets and
fabricating CoTP/C3N5 nanocomposite. The crystalline structure of CoTiO3/C3N5 (CoTP/C3N5) nanocomposites
was confirmed successfully by XRD analysis. The specific surface area of the synthesized CoTP/C3N5 nanocomposite
was 8.15 m2/g calculated by N2 adsorption–desorption technology. In the 60th minute of the photocatalytic
process, the degradation efficiency of MB, TC, and BPA by CoTP/C3N5 were obtained as 98.70, 60.33,
and 92.90 %, respectively, which were higher than pristine CoTiO3 nanorods and C3N5 nanosheets. Electrochemical
impedance analysis shows that the CoTP/C3N5 nanocomposite has good electrochemical performance.
The improvement photocatalytic activity CoTP/C3N5 can be attributed to the suppressing the recombination of
photogenerated electrons and holes and good electrochemical performance with high electron transfer capability.
The results achieved from UV–Visible Diffused Reflectance Spectroscopy (DRS), mott-schottky measurements
and the photocatalytic degradation experiments in the presence of scavengers confirmed the significantly
accelerating the Z-scheme charge transfer mechanism where photoexcit
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