▎ 摘　　要

NOVELTY - A bismuth iodide oxide/ferrosoferric oxide (BiOI/Fe3O4)-doped graphene oxide (GO) photocatalyst comprises a BiOI/Fe3O4 photocatalyst immobilized on graphene oxide (GO). USE - Bismuth iodide oxide/ferrosoferric oxide-doped graphene oxide photocatalyst used as magnetically separable photocatalyst in slurry-type photoreactor for degrading 2,4-dinitrophenol and rhodamine dye in wastewater treatment. ADVANTAGE - The bismuth iodide oxide/ferrosoferric oxide-doped graphene oxide photocatalyst has excellent photocatalytic activity for the DNP degradation under visible light, stability, and recycle efficiency for ten catalytic cycles. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the photocatalyst, which involves (a) ultrasonically processing 1.0 g GO for 30 minutes in 100 mL distilled water to obtain well dispersed GO suspension, (b) adding 1.0 g bismuth(III) nitrate and 0.50 mg Fe3O4 to GO solution with magnetic stirring for 10 minutes, (c) adding 0.37 g potassium iodide and 0.35 g sodium acetate to reaction mixture with stirring for 10 minutes at room temperature followed by ultrasonically processing for 30 minutes and aging for 90 minutes, and (d) obtaining precipitates by separating using magnets, washing with water and ethanol for three times, drying the separated precipitates at 60 degrees C overnight to obtain BiOI/Fe3O4-doped GO.