Study on decomposing ozone using activated carbon-supported complex metal oxide catalysts

Activated carbon-supported Mn-Fe and Mn-Cu (Mn-Fe/AC, Mn-Cu/AC) catalysts were prepared by the dipping method and were characterized. The effect of catalytic activity of catalysts, relative humidity and ozone initial concentration on decomposing ozone were also studied. The experimental results showed that catalytic activity of Mn-Fe/AC catalyst is superior to that of Mn-Cu/AC one, and per gram Mn-Fe/AC catalyst can decompose 3.43 g ozone. The relative humidity has a significant effect on catalytic activity. That is, the higher the relative humidity is, the lower the catalytic activity. There is a critical initial ozone concentration of 1.908 mg/L. When initial ozone concentration exceeds it, the activated carbon would react with ozone, and the catalyst lost weight.