Development of cutting edge materials using a benevolent ecologically cordial methodology is an ideal approach for heterogeneous visible light photocatalysis. A new biogenic photocatalyst was developed by coupling titanium dioxide (TiO 2 ) decorated elongated rhombic shape silver chromate (Ag 2 CrO 4 ) with gold (Au) and reduced graphene oxide (r-GO) for dye degradation applications under visible light. An ecologically positive methodology was utilized to develop the quaternary Ag 2 CrO 4 /TiO 2 /Au/r-GO nanostructures biofilm with gold and reduced graphene oxide (r-GO) via impregnation and in situ reduction technique in the presence of acacia gum. The structural properties and morphology of the Ag 2 CrO 4 /TiO 2 /Au/r-GO nanostructures were described by several spectroscopic and microscopic methods such as XRD, XPS, ATR-FTIR, Raman spectroscopy, FE-SEM, etc. Alteration with Au and r-GO decreased the band vitality and essentially improved the visible light ingestion of the quaternary Ag 2 CrO 4 /TiO 2 /Au/r-GO composite biofilm photocatalyst and slowed down the recombination process of the photogenerated electrons and holes. To demonstrate how such a unique heterostructured biofilm might produce more outstanding photocatalytic activity, we examined a comparison of the photocatalytic performances of Ag 2 CrO 4 /TiO 2 /Au/r-GO hybrid biofilm with different inner structures. The photocatalytic debasement of MB reached almost 97% within 52 min, and it has been found that the Ag 2 CrO 4 /TiO 2 /Au/r-GO biofilm increased the degradation rate of MB by a factor of 10.8, 6.5, and 3.1 in comparison with exposed Ag 2 CrO 4 , Ag 2 CrO 4 /TiO 2 , and Ag 2 CrO 4 / TiO 2 /Au biofilms, individually. Further, the high electron movement capacity of Ag 2 CrO 4 /TiO 2 /Au/r-GO biofilm was explored by photoelectrochemical investigation and TCSPC to comprehend the mechanistic insight of the superior activity of this composite nanostructures under visible light illumination. Hence, the present investigation describes a facile, eco-friendly, and biomimetic approach for the fabrication of Ag 2 CrO 4 /TiO 2 /Au/r-GO biofilm based photocatalyst using acacia gum.

Chirality-induced metallic and metal-oxide nanoparticles (NPs) hold promising potentials in chiroptical, asymmetric catalysis, chiral discrimination, and drug delivery. Here, we report a simple but scalable method for the preparation of...

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