Photocatalytic degradation of Malachite Green using ZnO and ZnOTiO2 nanoparticles from aqueous solution

Today, despite the increasing demands for the products of chemical industries and the relatedfactories, the challenges of environmental pollution have not been improved and it is approaching avery dangerous stage. In this regard, the role of dyeing industries in contaminating the environment isundeniable. In this research, ZnO and ZnO-TiO2 nanoparticles were synthesized by co-precipitation andsol-gel methods, respectively. The synthesized nanoparticles were characterized by XRD and FE-SEMtechniques and their band gap energy were determined using the UV-Vis spectrum obtained from thesuspension of nanoparticles. By using synthesized nanoparticles, degradation of malachite green underirradiation of the UV (A) -Visible mixture light from aqueous solution were evaluated and the effect ofdifferent parameters such as amount of photo catalyst, time of light irradiation and dose of H2O2hasbeen studied. The destruction amount was determined by UV-Vis spectroscopy method. Based on thereported results, the maximum degradation efficiency of about 99% was obtained in the optimal valuesof experimental conditions.