Photodecomposition of NO by sol-gel TiO_2 catalysts under atmospheric conditions: Effect of the method on the textural and morphologic properties

摘要

Photodecomposition of nitric oxide (NO) in the open air by sol-gel TiO_2 catalysts with different solvents and thermal treatments was studied. The sol-gel TiO_2 catalysts showed high surface areas, rich anatase phases, small particle sizes and bandgap-energy changes. The photoactivity was performed in an insulated chamber with 50 ppm (NO) and a 365-UV light. The sol-gel TiO_2 catalysts (which were activated at 200 and 500 ℃ and prepared by using two different solvents) showed high NO decomposition under UV light illumination. Taking into account the aforementioned results, these catalysts could be applied for the NO decomposition under atmospheric conditions.