Electronic properties and photodegradation ability of V–TiO2 for aniline
Photocatalytic technology has broad prospects in the degradation of organic pollutants due to its green, energy-saving and high-efficiency characteristics. In this study, TiO 2 and V–TiO 2 were prepared by hydrothermal method , and the catalysts were tested by experimental and theoretical calculations under a 400 W metal halide lamp degradation efficiency for aniline (30 mg/L). The synthetic photocatalysts were characterized by XRD , HRTEM , FT-IR, XPS , UV–Vis DRS , PL , EIS , and photocurrent , the results showed that the edges of the V-doped TiO 2 absorption band were redshifted, the band gap value were reduced, the photocatalytic activity were improved, and the PL showed e − /h + had the lowest composite rate for 1.5 mol%V–TiO 2 and broadens the optical response range. 1.5 mol% V was the optimal value for photodegrading aniline, and moderate V modification can significantly inhibit the complexation of e − /h + pairs. Finally, stability measurements performed over 5 cycles show that 1.5 mol%V–TiO 2 has excellent stability. The calculation results show that the optical band gap of V–TiO 2 were significantly reduced, the photocatalytic performance of V–TiO 2 were greatly enhanced.
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