Experimental parameters Experimental results Pseudo-first order model Experimental results Pseudo-first order model
CR BP4B
ADS / % PCD /% kapp /min-1 t1/2 /min R2/% ADS/% PCD/% kapp/min-1 t1/2/min R2 /%
Light Intensity I/ J/cm2 50 12.20 77.11 0, 029 16.906 83.7 50.65 77.35 0.022 31.364 92.8
 60 11.19 83.78 0.027 12.603 64.7 32.41 80.24 0.022 31.364 96.9
70 17.93 94.33 0.045 15.403 98.6 34.95 87.57 0.032 21.661 75.2
80 24.07 98.69 0.055 12.603 83.1 26.14 86.52 1.032 0.672 75.2
90 10.50 95.02 0.041 16.906 88.1 3.89 97.24 0.026 26.456 95.6
R2: Regression coefficient, ADS: Adsorption and PCD: Photocatalytic degradation
Table 4: Kinetic parameters of photocatalytic degradation of dyes in aqueous solution as a function of light intensity
([ZnO]=0.5g/L (for CR) and 1g/L (for BP4B), pH=8,[CR]=[BP4B]=20-60mg/L, pH =8, T=298K and λmax=365 nm).