Synthesis of pineapple slab like morphology of ternary BiVO4/graphene/porphyrin nanocomposite with enhanced visible light photocatalytic activity

Abstract

In this work, composites of BiVO 4 with different contents of graphene are synthesized. Photocatalytic investigations determine that the prepared BiVO 4-graphene (BVG) nanocomposite with 0.5% of graphene has higher photocatalytic activity among the synthesized nanocomposites. The photocatalytic efficiency of BVG is 2 times higher than BiVO 4. To improve the photocatalytic activity under visible light irradiation, the prepared nanocomposite was photosensitized with porphyrin as strong light harvesting agent. The obtained BVG photosensitized with porphyrin (BVG-P) could completely remove methyl orange dyer in 180 min. Slab-like morphology and the incorporation of porphyrin show to be key factors in high photocatalytic activity of BVG-P.

Porphyrin-containing materials for photodegradation of organic pollutants in wastewaters: a review

“…Rahimi and co-workers 221 prepared a composite of BiVO 4 –graphene impregnated with porphyrin H 2 22 (Fig. 16) and evaluated its ability as a photocatalyst to degrade MO in aqueous solution under white light irradiation.…”

When porphyrins meet 2D materials: spectroscopic and photocatalytic properties

“…For instance, Aghakhaninejad et al described the synthesis of ternary composites, where BiVO 4 replaced TiO 2 . 154 This resulted in the formation of a BiVO 4 /G/TCPP hybrid material, which exhibited a distinct pineapple slab-like morphology. Following 30 minutes of visible light exposure, the composite displayed 78% efficiency in the photodegradation of MO, marking a 3.5-fold improvement compared to its binary counterpart, BiVO 4 /G.…”