Table 2: Degradation reaction rate constants by UV irradiation photocatalytic oxidation of MG dye over TiO2/AC, TiO2/NC, and TiO2 (P25).

Initial concentration (mg/L)TiO2/ACTiO2/NCTiO2 (P25)

250,04580,99420,03060,99450,02140,9944
500,03840,9940,02390,98980,01950,9917
750,03030,9870,01870,99410,01460,9828
1000,02530,99340,01390,99150,00910,9904
1500,01330,98830,01060,98690,00430,9564

: estimated rate constant; : correlation factor.