Designing the heterostructured FeWO/FeS nanocomposites for an enhanced photocatalytic organic dye degradation.

The present study, reports a facile approach for the synthesis of FeWO/FeS nanocomposites were demonstrated through hydrothermal method. The surface morphology, crystalline structure, chemical composition, optical properties of the prepared samples was analysed by different various technique. The result observed analysis indicates that, the formation of heterojunction by 2:1wt% of FeWO/FeS nanohybrid has the lowest recombination rate of electron-hole pairs and the least electron transfer resistance. Due to its the broad absorption spectral range and preferable energy band gap, the (2:1) FeWO/FeS nanohybrid photocatalyst exhibits an excellent ability to remove MB dye when exposed to UV-Vis. Light irradiation. Its photocatalytic activity of (2:1) FeWO/FeS nanohybrid is higher than other as prepared samples due to its synergistic effects, enhanced light absorption and high charge carrier separation. Radical trapping experimental result implies that the photo-generated free electrons and hydroxyl radials are essential to degrade the MB dye. Furthermore, a possible future mechanism for FeWO/FeS nanocomposites photocatalytic activity was discussed. Moreover, the recyclability analysis demonstrated that the FeWO/FeS nanocomposites can be recycled multiple times. The enhanced photocatalytic activity of 2:1 FeWO/FeS nanocomposites is promising for the further application of visible light driven photocatalyst in wastewater treatment.