چكيده به لاتين
In this work, the synthesized BiVO4 was composed with several contents of graphene. Photocatalysis investigations determine that the prepared BiVO4-graphene (BVG) nanocomposite with 0.5% of graphene has higher photocatalytic activity among the synthesized nanocomposites. This sample (BVG) completely destructs methyl orange dye pollutant with 10 mgL-1 concentration in 180 min under visible light irradiation. To improve the photocatalytic activity under visible light irradiation, the prepared nanocomposite was photosensitized with porphyrin and metalloporphyrin as strong light harvesting agent. Several methods were investigated to effectively combine the porphyrin molecule on the BiVO4 surface. The obtained BVG photosensitized with porphyrin (BVG-P) and metalloporphyrin (BVG-SnP) via the optimum method was used to destruct of 10 mgL-1 methyl orange (MO) and 2, 4-dichlorophenole (DP) under visible light irradiation. The BVG-P and BVG-SnP catalyst completely destructs MO and DP in 180 min and 240 min and 45 min and 60 min respectively. It is notable that the presence of porphyrin and metalloporphyrin in the prepared photocatalyst led to the better kinetic in photocatalysis process rather than BVG nanocomposit. Furthermore, the photodegradation mechanism over the prepared BVG-P and BVG-SnP is discussed
in details.
Keywords: Graphene, BiVO4, Porphyrin, Metalloporphyrin, Photocatalysis, Visible light
