Silver(I) Catalyzed Photochemical Oxidation of Methylene Blue and Safranine-O by Peroxydisulphate: A Green Chemical Approach

Table 1

Typical run.

Methylene blue		Safranine-O
Time/min		Time/min
0.0	0.949	0.0	0.953
15.0	0.856	10.0	0.859
30.0	0.796	20.0	0.796
45.0	0.707	30.0	0.679
60.0	0.645	40.0	0.621
75.0	0.546	50.0	0.550
90.0	0.513	60.0	0.482
105.0	0.410	70.0	0.418

For methylene blue; pH = 5.0; [Methylene Blue] =  mol dm⁻³; [] =  mol dm⁻³; [AgNO₃] =  mol dm⁻³; light intensity = 60.0 mW cm⁻²; rate constant () =  sec⁻¹. For safranine-O; pH = 4.5; [Safranine-O] =  mol dm⁻³; [] =  mol dm⁻³; [AgNO₃] =  mol dm⁻³; light intensity = 60.0 mW cm⁻²; rate constant () =  sec⁻¹.