N₂0 photocatalytic decomposition

K. Kočí, L. Matějová, L. Obalová

VSB-Technical University of Ostrava, 17. listopadu 15, 708 33 Ostrava, Czech Republic, Tel.: +420 597 321 532, E-mail: kamila.koci@vsb.cz,

Abstract

N₂0 is the third most important of the long-lived greenhouse gases (LLGHGs) in the globál warming terms. Although it only comprises 320 parts per billion of the earth’s atmosphere, its contribution to globál warming is important as it has a globál warming potential nearly 300 times greater than that of C0₂. The photocatalytic decomposition of nitrous oxide on semiconductor photocatalysts under UV irradiation may be an attractive and economically competitive method for its removal. Considering the commercial availability, Chemical stability and suitable optical/electronic adjustable properties, Ti0₂ nanomaterials seem to be an appropriate candidate. The doping of Ti0₂ with suitable ions seems to be a promising method for improving its photocatalytic efficiency. Improved photocatalytic activity of Ti0₂ was observed in the photocatalytic decomposition of N₂0 after the doping of Ti0₂ by silver, cerium or nitrogen.