A micellar polyoxoperoxometalate [C16H33N(CH3)3]7[PW10Ti2O38(O2)2]: A highly efficient and stable catalyst for air oxidation of thiocyanate under room conditions

A micellar polyoxometalate catalyst [C16H33N(CH3)3]7[PW10Ti2O38(O2)2] was prepared and used for catalytic wet air oxidation of thiocyanate (SCN−). The 97.6% removal efficiency was obtained with oxygen and under room conditions. And the oxidation of SCN− was achieved completely leading degradation products SO42−, HCO3−, NH4+ and NO3− within 150 min. The leaching test showed that the POM micellar catalyst had excellent stability and could be used as heterogeneous catalyst for about five times.

Graphical AbstractPolyoxometalate micellar catalyst: a facile, ecologically friendly method for degradation of thiocyanate under room conditions had been explored using oxygen as the oxidant within short time by micellar POM catalysts.Figure optionsDownload full-size imageDownload as PowerPoint slideResearch Highlights► A polyoxometalate micellar catalyst [C16H33N(CH3)3]7[PW10Ti2O38(O2)2] had been prepared using simply method. ► By it, thiocyanate could be completely oxidized to simple ions under mild conditions. ► Cheap oxidant molecular oxygen was used to achieve the oxidant. ► This micellar POM catalyst was stable during five reaction cycles.