▎ 摘　　要

Novel visible-light responded aluminophosphate-5/graphene oxide (AlPO-5/GO) composite have been easily constructed by hydrothermal method from the mixture of GO with tri-ethylamine as template, pseudo-boehmite as aluminum source and phosphoric acid as phosphorus source. In order to use the synthesized comnposite as a photocatalyst in the visible light region, the structure of the photocatalyst was modified by adding copperous oxide (Cu2O). The structural and morphological characterizations of the synthesized compounds were analyzed using a series of analytical techniques. The diffuse reflectance spectra showed band gap energies is 3.9 and 2 eV for AlPO-5/GO and AlPO-5/Cu2O/GO, respectively. The electron microscopy images indicated spherical morphology for Cu2O with average size of 400 nm over AlPO-5/GO composite. Based on zeta potential study, the AlPO-5/Cu2O/GO nanocomposite was suitable for degradation of cationic dye. The photocatalyst showed excellent activity under visible light and was used for the photodegradation of methyl green (MG) as target cationic pollutant. The effects of AlPO-5 incorporation and Cu2O on the photocatalytic performance have been discussed in detail. The optimized AlPO-5/Cu2O/GO nanocomposite shows favorable degradation efficiency which is 80.2% at 90 min. The results indicated photodegradation of dye in presence of GO/Cu2O and AlPO-5/ GO was less than AlPO-5/Cu2O/GO nanocomposite. Therefore, aluminophosphate-5 and Cu2O nanoparticles play important role in migration of photo-induced electrons from CB of Cu2O to GO and next time to the Al site of AlPO-5. This achievement not only improves the photocatalytic activity of GO efficiently, but also broadens the application of AlPOs in the photocatalytic field.