Phosphotungstates as catalysts for monoterpenes oxidation: Homo- and heterogeneous performance

► Phosphotungstates exhibits high catalytic activity for monoterpenes oxidation. ► Lacunary PW11 revealed to be the best of the studied catalyst. ► Phosphotungstates were immobilized onto amine-modified SBA-15. ► Composite materials showed to be active and stable catalysts.