Sonophotocatalytic degradation of fast green in aqueous phase using undoped and nitrogen doped ZnO

Nowadays, nanoparticles have proved their great potent to eliminate the toxic material already produced in environment via simple microwave induced synthesis. In these a fast and efficient synthesis of N-ZnO and undoped nanoparticles was performed by microwave irradiation. The main objective of present study is to obtain optimize condition for photocatalytic and sonophotocatalytic degraded dye i.e. (fast green). The morphology besides structure of nanoparticles were determined by FTIR (Fourier-transform Infrared Spectroscopy), energy dispersive X-ray (EDX), X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), Ultraviolet-Visible (UV-Vis) spectroscopy and Transmission Electron Microscopy (TEM). A comparative evaluation of photocatalysis, sonocatalysis and sonophotocatalysis processes was done for fast green dye using visible light and ultrasound irradiation, separately and simultaneously. The oxidative degradation of fast green dye was studied under different operating conditions including pH, primary concentration of dye and initial quantity of catalyst. The degradation proficiency by N-ZnO (doped) was obtained greater when contrasted with the undoped ZnO. The complete dye decay occurs in 100 min with sonophotocatalytic treatment. The water quality parameters before and after the sonophotocatalytic treatment were monitored by water analyser. Isopropanol was used as a radical scavenger to confirm center dot OH radicals since primary energetic species in the effective destruction of the fast green dye.