Synthesis, Property Characterization, and Photocatalytic Activity of Novel Visible Light-Responsive Photocatalyst Fe2BiSbO7

Abstract EN

Fe2BiSbO7 was synthesized by a solid-state reaction method for the first time.

The structural and photocatalytic properties of Fe2BiSbO7 have been characterized.

The results showed that Fe2BiSbO7 was crystallized with the pyrochlore-type structure, cubic crystal system, and space group Fd3m.

The lattice parameter for Fe2BiSbO7 was a=10.410297 Å.

The photocatalytic degradation of methylene blue (MB) was realized under visible light irradiation with Fe2BiSbO7 as catalyst.

Fe2BiSbO7 owned higher catalytic activity compared with Bi2InTaO7 or pure TiO2 or N-doped TiO2 for photocatalytic degradation of MB.

The photocatalytic degradation of MB with Fe2BiSbO7, Bi2InTaO7, or N-doped TiO2 followed the first-order reaction kinetics, and the first-order rate constant was 0.01189, 0.00275, or 0.00333 min-1.

After visible light irradiation for 230 min with Fe2BiSbO7, complete removal and mineralization of MB was observed.

The reduction of the total organic carbon, the formation of inorganic products, SO42- and NO3-, and the evolution of CO2 revealed the continuous mineralization of MB during the photocatalytic process.

The photocatalytic degradation pathway of MB was obtained.

Fe2BiSbO7/(visible light) photocatalysis system was found to be suitable for textile industry wastewater treatment.