Kinetic Study on Photocatalytic Degradation of Reactive Brilliant Blue KN-R by Titanium Dioxide

The photocatalytic degradation of Reactive Brilliant Blue KN-R has been investigated by using nano-TiO2 as photocatalyst.The effects of operation parameters such as initial dye concentration,catalyst loading,hydrogen peroxide dosage as well as initial pH value on kinetics of photocatalytic degradation are studied.The results show that the degradation of the dye follows a pseudo-first-order kinetics and the apparent rate constant increase with the increase of pH value and the decrease of dye concentration.Furthermore,the apparent rate constant would decrease when the addition of TiO2 and H2O2 are beyond or below the specific amounts and the optimum amounts of TiO2 and H2O2 under the experimental conditions are 0.5 g·L-1 and 2.0×10-2 mol·L-1,respectively.