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Highlights: [•] A highly active Bi2O3/NaNbO3 photocatalyst was prepared by a facile ball milling. [•] The results revealed that Bi2O3/NaNbO3 is characteristic of Z-scheme photocatalyst. [•] The rate constant of RhB for Bi2O3/NaNbO3 is 6.3 times that of pure NaNbO3. [•] The e− in the CB of Bi2O3 and h+ in the VB of NaNbO3 are quickly combined. [•] The e− in the CB of NaNbO3 and h+ in the VB of Bi2O3 produce •O2 − and •OH, respectively. [ABSTRACT FROM AUTHOR]

Ce2S3 photocatalysts were synthesized by a co-precipitation method using cerium nitrate and thioacetamide as raw materials. The samples were characterized by X-ray powder diffraction analysis, UV–visible diffuse reflectance spectroscopy, scanning electron microscopy, and differential thermal analysis. Photocatalytic reduction of nitrobenzene (NB) under UV or visible light illumination was used to evaluate the photocatalytic activity of the Ce2S3 samples. The result indicated that the sample prepared at 300°C for 12h exhibited the highest activity. For 140mL 8.13×10−4 mol/L of NB in methanol solvent, after illumination for 5h, about 43.9% and 34.7% of NB were reduced to aniline over the sample under UV and visible light irradiation, respectively. The effects of the catalyst amount, illumination time, and sorts of solvent on the photocatalytic performance were investigated specifically. The reduction process of NB over Ce2S3 was finally discussed. [ABSTRACT FROM AUTHOR]