Fabrication of heterostructured vanadium modified g-C3N4/TiO2 hybrid photocatalyst for improved photocatalytic performance under visible light exposure and antibacterial activities

Improving visible-light active photocatalytic performance of the heterostructured g-C3N4-V-TiO2 (g-C3N4-Vanadium-TiO2) hybrid catalyst has been synthesized via facile calcination and ultrasonic dispersion facilitated hydrothermal techniques were considered. The phase composition, morphology, surface area, chemical structure as well as optical properties were systematically characterized. HR-TEM images were exposed good crystallinity of g-C3N4-10% V-TiO2 nanocomposite (size (similar to)35-40 nm) with V-TiO2 porous discrete on g-C3N4 nanosheets. Too occurred in high pore volume and large surface area (91.5 m(2) g(-1)) of g-C3N4-10%V-TiO2 hybrid catalyst compared than pristine g-C3N4. The 10% g-C3N4-V-TiO2 photocatalyst shows substantial photocatalytic activity, 5.7 and 4.8 times higher that pristine g-C3N4 nanosheets and TiO2 under visible light with the degradation efficiency over 99.5% for 60 min. Besides, the recycling test specified that the g-C3N4-10% V-TiO2 photocatalyst had admirable stability up to 5 sequential cycles. The trapping assessments which authorize that OH center dot- radicals and h(+) plays an active role in the degradation process and the separation of photoinduced charges transversely the heterostructure boundary reserved electron-hole recombination they were good agree with PL studies. Moreover, g-C3N4-10% V-TiO2 composite catalyst show high catalytic antibacterial activity against Escherichia coli (G(-)) and the Staphylococcus aureus (G(+)) bacteria. (C) 2019 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.