Synthesis of Mesoporous Nanoparticles via Microwave-Assisted Method for Photocatalytic Degradation of Phenol Derivatives

Abstract

Mesoporous transition metal oxides have gained attention widely since they possess both optical and electronic properties of transition metal oxides especially for photocatalytic degradation application. In this research work, mesoporous titania nanoparticles (MTN) and mesoporous zinc oxide nanoparticles (MZN) were successfully synthesized using microwave (MW)assisted method to degrade phenol derivatives under visible light irradiation. The microwave sintering effect on the surface of these modified structures was studied to relate with their photocatalytic performance. The characterization results indicated that MW-assisted method was mainly contributed in generating Ti 3+ site defects (TSD) and oxygen vacancies (OV) in MTN while for MZN contained only OV as one of the strategies in light-absorption modification for TiO 2 and ZnO to enhance their photoactivity. MTN also showed the degradation of 2-chlorophenol was up to 97% while degradation of phenol by MZN was up to 87%.

Mesoporous titania nanoparticles as photocatalyst for degradation of 2-chlorophenol

“…This method uses various semiconductor such as TiO2, ZnO, SnO, ZnS, CuO and Fe2O3 [4,7]. Among them, TiO2 has been widely used as photocatalyst in photocatalysis due to its potentials of being potent and stable even under exposure of light [8]. However, TiO2 has high electron-hole recombination rate of photodegenerated hole-electron pairs which decreased it efficiency [9].…”