An environmentally benign multiphase solid-liquid-gas catalysis

It is significant for the environment that molecular oxygen replaces conventional heavy metal-containing or toxic oxidants to participate in oxidation reactions. However, the involved gas-oil-solid multiphase catalytic reactions usually show low reaction efficiency due to the low solubility of gas in oil. Herein, Organic-inorganic hybrid with certain interfacial activity were synthesized by using alkoxysilane covalent modified POM. Such hybrid POM has surface activity and can be adsorbed at the gas-liquid interface, and allow direct contact between the gas, oil and catalyst at the interface. The performance of the foam system is superior to that of the conventional multiphase catalytic reaction at room temperature. In addition, there was no solvent required for the reaction. The catalyst can be recovered by centrifugation after the reaction.