Characteristics and Application of Zinc Oxide/Magnesium Oxide Hybrids

In this paper, we discuss the degradation characteristics of methylene blue and methyl orange after being mixed with zinc oxide (ZnO) and magnesium oxide (MgO) powders. Five types of ZnO/MgO mixed powders with different molar ratios (ZnO:MgO molar ratios of 0.95:0.05, 0.9:0.1, 0.85:0.15, 0.8:0.2, and 0.75:0.25) and two different catalyst concentrations were used in the experiment. Catalyst concentrations of 0.5 and 0.15 g/L were used to degrade methylene blue and methyl orange, respectively. The results showed that the powder with a molar ratio of 0.9:0.1 had a high degradation efficiency when the catalyst concentration was 0.15 g/L. The degradation of methyl orange was completed within 6 h, and the degradation of methylene orange reached 80% within 2 h.