Surface mechanism and optimization of catalytic ozonation with CoFe oxides as catalyst for degradation of sodium p-toluenesulfonate in water.

In this study, the removals of sodium p-toluenesulfonate (NaTSA) by catalytic ozonation with two different cobalt-iron compounds, CoFe oxides prepared by co-precipitation/calcination (CPO) and CoFe oxides prepared by direct calcination (DCO), as the catalysts, had a difference of about 12%. It was found that the CPO surface contained active type c water, which was generally adsorbed on the oxygen vacancy. The test of oxygen temperature-programmed desorption (O-TPD) showed that the surface of CPO was rich in oxygen vacancy.