CATALYTIC DECOMPOSITION OF HYDROGEN PEROXIDE ON MANGANESE DIOXIDE NANOPARTICLES AT DIFFERENT PH VALUES

Catalytic decomposition of hydrogen peroxide on manganese dioxide nanoparticles was studying under different experimental conditions such as pH (1, 6.5 and14) and at 15°C Temp. The kinetics of the reaction was analyzed by first order equation and rate constants were determined from the slopes of the straight lines. It was observed from the experimental results that the decomposition rate constant was found to be dependent on pH. MnO2 nanoparticles used as a catalyst for decomposition H2O2 were synthesized by chemical co-precipitation method. The as-prepared MnO2 nanoparticles were systematically characterized by X-Ray diffraction (XRD), FTIR and SEM - EDX analysis techniques. The average particle size of manganese dioxide nanoparticles was calculated from the XRD study. The average particle size of MnO2 nanoparticles was 14 nm. The resulting MnO2 nanoparticles were found to exhibit remarkable environmental catalytic performance in the catalytic decomposition of hydrogen peroxide in aqueous solution.