Degradation of Acid Yellow 36 Azo Dye From Textile Wastewater using Vanadium-doped TiO2 Photonanocatalyst

Abstract

The current research is focused on the manufacture of TiO2 and V-doped TiO2 nanocatalysts by sol-gel and the evaluation of photodegradation performance in the treatment of Acid Yellow 36 (AY36) dye from textile wastewater under visible light irradiation. SEM and XRD investigations revealed that TiO2 and V-doped TiO2 nanoparticles were produced in a spherical form, with well-crystallized α-V2O5 nanostructures inserted in an anatase TiO2 structure for V-doped TiO2 nanoparticles. The optical band gap energies of TiO2 and V-doped TiO2 nanoparticles were found to be 3.08 and 2.22 eV, respectively, in the study optical absorption spectra. Doping V into the TiO2 structure reduced the optical band gap energy, meaning that V-doped TiO2 could be used under visible illumination. Electrochemical investigations revealed that the V-doped TiO2 nanocatalyst had a decreased charge resistance and recombination rate. The photodegradation activity for treatment of 150 ml of 5 mg/l AY36 solution revealed that remarkable photodegradation was observed under the first 10 minutes of visible light irradiation for TiO2 (20%) and V-doped TiO2 (40%) in the presence of TiO2 and V-doped TiO2 nanocatalysts, respectively, and total photodegradation was obtained after 75 and 60 minutes of visible light irradiation in the presence of TiO2 and The V-doped TiO2 was found to be effective in removing AY36 from textile wastewater sources.