It is well known that nanocatalyst has a greater catalytic activity for transforming the chemical process. In the paper Reduced Graphene Oxide-Silver Nanoparticle Composite as Visible Light Photocatalyst for Degradation of Colorless Endocrine Disruptors" the figure 4 shows this effect. Determine the constant rate for the photocatalytic degradation of phenol under visible irradiation for control and for all the IGO:Ag composites. Talk about the effect of 1GO:Ag composite in this photocatalytic process. (a) (b) 1.0 Visible 1.0 UV 0.8 18 (L6 06 C/C, 5 C/C, 04 02 Centrul Cent 041 +GO: Ag=1:1 GO: A0:1 CO: Ag=0:1 GO: Ag=1:1 02 CD: Aq=1:05 -CO: Ag=1: ILS 60: Ag - 1:0.12 C20: Ag=1:012 0.0 GO: Ag = 1:0.25 -CO: A-1:0.25 00 0 100 200 300 400 SOO 0 100 200 300 400 500 Time (min) Time (min) Figure 4. Photocatalytic degradation of phenol under (a) visible and (b) UV light irradiation using Go-Ag composite with varying amounts of Ag showing that a GO/Ag ratio of 1:0.25 displays higher photocatalytic activity than the other composites, only GO nanoparticles, or only Ag nanoparticles. The control study indicates photolysis without any catalyst