CoZnFeO4 Prepared by Waste Ferrous Sulfate as Iron Source: Synthesis, Characterization and Photocatalytic Degradation of Methylene Blue

Abstract Aiming at devloping novel low cost and high performance catalyst for degradation of methylene blue in industrial waste water. Waste ferrous sulfater which is a industrial waste produced in the process of producing titanium dioxide, CoZnFeO4 is synthesized from waste ferrous sulfate by solid phase method. The experimental results show that CoZnFeO4 has better catalytic performance than other control samplesc: the degradation rate of methylene blue reaches 100% within 8 min, which maintains high catalytic activity after 5 cycles. Zeta potential and ICP-MS tests show that the degradation reaction occurs in the catalyst. The degradation pathway of methylene blue is verified by ESI-MS. These findings provide a low cost and simple strategy for rational design and modulation of catalysts for the industrial degradation of organic pollutants. It not only realizes the use of waste to treat waste, but also accords with the current concept of green chemistry.