Comparison of the Properties of Nanosized TiO2(ZnO)/WO3 and TiO2(ZnO)/MoO3 Composites Synthesized by Ultrasonic and Mechanochemical Methods in the Decomposition of Metronidazole
摘要
Mechanochemical and sonochemical modification of complexe oxides mixtures ZnO/MoO3, ZnO/WO3, TiO2/MoO3 and TiO2/WO3 with equimolar ratio of the initial oxides was realized. The formation of new phase ZnWO4 at mechanochemical treatment of the mixture oxides was shown. XRD method was established that mechanochemical treatment leads to an essential decrease of the composites particles size in contrary to sonochemical treatment where in the most cases an increase of the particles dimensions was observed. The data obtained by XRD method were confirmed by SEM results. It was shown that an increase of particles size composites at sonochemical treatment accompanied by an increase of their photocatalytic activity in metronidazole decomposition in water solution which can be connected with an decrease of the electron–hole rate recombination.