Doughnut-Shaped NdFeO3 Perovskite/Porous In2O3 as a Promising Heterojunction Photocatalyst for Organic Pollutants Removal

In this work, a novel highly efficient perovskite type NdFeO 3 /porous In 2 O 3 heterojunction photocatalyst is designed through a simple solvothermal process. The as-synthesized photocatalysts were characterized by XRD, Raman, FT-IR, UV–vis DRS, FE-SEM, HR-TEM, and XPS characterization techniques. The superior photo-Fenton (PhF) degradation efficiency of the NdFeO 3 /In 2 O 3 heterojunction photocatalyst is notably higher for coloured pollutants, upon visible light irradiation. The photocatalytic degradation of rhodamine-B (rhB) over the NdFeO 3 /In 2 O 3 heterojunction was higher (92.5%) than pure NdFeO 3 and In 2 O 3 . Furthermore, the NdFeO 3 /In 2 O 3 heterojunction photocatalyst also exhibits remarkable degradation performance in the visible light assisted PhF process of various pollutants (methylene blue, methyl orange, phenol, and tetracycline). The increase in photocatalytic performances of the NdFeO 3 /In 2 O 3 heterojunction is credited to the improvement in efficiency of separating electron–hole pairs and superior PhF mechanism from the perovskite type NdFeO 3 . The improved visible light degradation efficiency and PhF process of the prepared material could be utilized in real-world effluents and waste water treatment processes.