Synthesis of bentonite-supported Fe(II) and heteropolyacid (HPW) composite through a mechanochemical processing

A mechanochemical synthesis process was introduced as a facile method for producing bentonite-supported Fe(II) and heteropolyacid (HPW) composite, a catalyst used for photo-Fenton reaction and conventionally produced only by liquid-phase synthesis method. The composite was successfully synthesized, and the optimum synthesis conditions were obtained. The characterization demonstrated the functional components of Fe(II) and HPW were successfully immobilized, and the formation mechanism of composite in the mechanochemical synthesis was presented. The composite showed both high catalytic ability and excellent long-term stability in use. Mechanochemical synthesis, as a green, simple and efficient preparation technology, was suitable for the industrial production of bentonite-supported Fe(II) and HPW composite.103