Phenolic resin derivatized TiO2-walnut shell carbon hybrid materials for solar photocatalytic phenol removal

Abstract

In this study, phenolic resin modi ed TiO 2 (PF/TiO 2 ), TiO 2 /WSC (Walnut shell carbon) and PF/TiO 2 /WSC hybrid composites were successfully synthesized by sol-gel method. The obtained TiO 2 -based composites were characterized by XRD, SEM, FTIR and XPS techniques. The phase characterization results showed that TiO 2 phase is anatase in PF/TiO 2 /WSC (300℃, 2h) composite material, also TiO 2 was uniformly loaded on the surface of the WSC to make the binding energy of Ti shift. Ti-O-C bonds are formed in the prepared TiO 2 /WSC and PF/TiO 2 /WSC (300℃, 2h) photocatalyst. When the catalyst dosage was 2.0 g/L, the initial phenol concentration was 80 mg/L, 10%PF/30%TiO 2 /WSC composite showed the best activity and its degradation rate was 88.14% under sunlight for 150 min. The active centers of PF/TiO 2 /WSC photocatalytic degradation of phenol were •OH and •O 2 -, and the photocatalytic degradation mechanism was proposed. The synergistic system of WSC adsorption and the superior photocatalytic performance of phenolic resin modi ed TiO 2 achieved high degradation e ciency of pollutants in water and provided a new idea for solar photocatalytic removal of pollutants.