Photocatalytic Degradation of Phenolic Compounds in Presence Electrogenearated O3 and or H2O2

Abstract

A Graphene oxide (GO) was prepared using modified Hummer`s method starting from graphite. GO was impregnated on commercial nanoparticles P25 TiO2 (GOTi) or WO3. After that, reduced GOTi or GOWO3 was obtained by hydrothermal reduction. The photocatalysis behavior of as-prepared catalysts were tested towards the phenolic compounds degradation and compared against commercial P25 TiO2 in presence and absence of in-situ electrochemically generated ozone. The SiO2/Ti300nm/Pt100nm/TiOx100nm/SnOx500nm electrode was used to produce ozone electrochemically. Table 1 showed that the photocatalytic degradation rate constant of phenol on RGOTi under Xe illumination in presence of H2O2 and electrochemically generated ozone is the better than TiO2. Table 1: Rate constant data in min-1 of phenol (20 mg L-1) on Ti and RGOTi under 150 Xe illuminations in absence and absence of 70 µL H2O2 and Ozone Xe Xe + H2O2 Xe + O3 Xe + H2O2 + O3 Ti RGOTi Ti RGOTi Ti RGOTi Ti RGOTi 0.0214 0.0226 0.0296 0.032 0.0257 0.0262 0.0375 0.0615