Catalytic wet peroxide oxidation of phenol by [C16H33(CH3)3N]4H2SiV2W10O40 catalyst

Abstract

A micellar tungstovanadosilicic polyoxometalate (POM) catalyst [C₁₆H₃₃(CH₃)₃N]₄H₂SiV₂W₁₀O₄₀ (abbreviated as [C₁₆]₄H₂SiV₂W₁₀) was prepared and used for catalytic wet peroxide oxidation (CWPO) of phenol. Energy Dispersive X-ray Spectroscopy (EDX), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), and ²⁹Si MAS NMR were used to characterize the resulting sample. The best catalytic activity was obtained by [C₁₆]₄H₂SiV₂W₁₀ with 91.6% degradation effect, 93.2% COD removal and 85.5% TOC reduction with H₂O₂ under room condition towards complete degradation of product CO₂ within 90 min. The leaching test showed that the POM micellar catalysts had an excellent stability and can be used as heterogeneous catalysts for about six times.