Study on the synthesis and photocatalytic performance of molybdovanadosilicic acids

The molybdoyanadosilicic acids were prepared by multi step and ether extraction method, and the part of synthetic compounds were immobilized on the titanium by sol-gel method. As synthesized composites were characterized by FT-IR and SEM. The result showed that the prepared compounds have Keggin structure, and remain the structure after immobilizing. Also, the HPA for degrading dye wastewater analog, photocatalytic decolorization rate methyl orange solution is investigated. The photocatalytic performances, the effects of the different amount of catalyst and oxidant for the catalytic performance of immobilized HPA and the catalytic performance of recycling three times were discussed. The results showed that the photocatalytic performances of the immobilized was more better, and photo-degradation efficiency relies on the amount of catalysts and oxidants, the catalyst is recoverable and readily to recycle.