Abstract
The photocatalytic degradation of Erythrosine, an anionic dye ( λ max at 526 nm, ɛ max = 7.24 × 10 4 L mol −1 cm −1), has been investigated over TiO 2 and ZnO photocatalysts, irradiated by UV–vis light. Spectrum of the dye has been found, unaffected in the pH range 4.86–11.56. The adsorption over TiO 2 and ZnO surface followed Langmuir and Freundlich adsorption isotherms. The extent of adsorption decreased with the rise of pH. But the percent of decolourization fluctuated over this pH range. Increment of initial dye concentration adversely affected the decolourization efficiency but proportionately affected with the catalyst loading until it gets attenuated after 2.0 g/L. The presence of H 2O 2 in lower concentration (ie, 4 × 10 −4 M) with the catalysts decelerated the degradation but accelerated at higher concentration (ie, 300 × 10 −4 M). Kinetic studies including order of the reaction, rate constant and half-life have also been performed in the presence of TiO 2 and ZnO.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.