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

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) 2019, 76(0), , pp.318-332
• Main Authors: Shanmugam, Vignesh, Sanjeevamuthu, Suganthi, Jeyaperumal, Kalyana Sundar, Vairamuthu, Raj
• Format: Article
• Language: English
• Subjects: Charge separation; g-C3N4-V-TiO2; Heterostructured photocatalysts; Higher surface area; Visible light; Wastewater treatment; 화학공학
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2019.03.056

[Display omitted] •g-C3N4-10% V-TiO2 hybrid was prepared via a simply calcination and hydrothermal approach.•The heterostructure has exhibited good electron-hole separation efficiency by induced surface-states of the coupled V-TiO2.•Optimal degradation rate of MB dye reached 99.5% for 60 min which is almost 5.7 and 4.8 times of g-C3N4 nanosheet and TiO2.•Hydroxyl radical and holes as the vital role’s reactive species in photodegradation of MB dye.•The hybrid catalyst with extended visible light active photocatalyst, superior cycle stability and bacterial disinfection. 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 ˜ 35–40 nm) with V-TiO2 porous discrete on g-C3N4 nanosheets. Too occurred in high pore volume and large surface area (91.5 m2 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− 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.