Abstract: This study synthesized a series of nanosized BiOITiO2 catalysts to photodegrade Bisphenol-A (BPA) solution. The BiOITiO2 nanoparticles were synthesized in reverse microemulsions, consisting of cyclohexane, Triton X-100, n-hexanol and aqueous salt solutions. The synthesized particles were characterized by X-ray diffraction (XRD), BrunauerEmmettTeller (BET) surface analyzer and ultravioletvisible light (UVVis) absorption spectra. The photodegradation of bisphenol A in aqueous suspension under visible light irradiation was investigated to explore the feasibility of using the photocatalytic method to treat BPA wastewater. The effects of different molar ratios of BiOI to TiO2 on the photocatalytic activities of BiOITiO2 composites were discussed. The experimental results revealed that the photocatalytic activity of the BiOI-TiO2 particles were superior to the commercial P25 TiO2. The BPA degradation could be approached by a pseudo-?rst order rate expression. The observed reaction rate constant (kobs) was related to nanoparticles dosage and initial pH. The recycling experiments confirmed the relative stability of the catalyst.