Removal of reactive blue 19 dye by sono, photo and sonophotocatalytic oxidation using visible light

摘要: An efficient sonophotocatalytic degradation of reactive blue 19 (RB 19) dye was successfully carried out using sulfur-doped TiO2 (S-TiO2) nanoparticles. The effect various treatment processes that is sonolysis, photolysis, catalysis, sonocatalysis, photocatalysis, and sonophotocatalysis were investigated for RB removal. S-TiO2 synthesized in 1, 3 5 wt.% sulfur by sol-gel process characterized X-ray diffraction (XRD) scanning electron microscopy coupled with energy dispersive (SEM-EDX), UV-Visible diffuse reflectance spectra (DRS). results confirm anatase phase TiO2, porous agglomerate structure, a red shift the absorbance S-TiO2. studied UV-Vis spectrophotometer at λ max=594 nm. reaction parameters such as pH, catalyst dosage, initial concentration, ultrasonic power doping different weight percent to find optimum conditions. Optimum conditions found as: S-TiO2=5 wt.%, (S-TiO2 wt.%)=50mg, solution concentration=20 mg L(-1), pH=3, ultrasound power=100 operating temperature=25°C. response better than 1 other forms TiO2. superior methods. During this cavitation photocatalysis water splitting takes place which leads generation OH. As reveled GCMS (20 L(-1)) degraded 90% within 120 min. system first time practicable, cost effective complex resistant dyes RB19.