Materials for Energy, Efficiency and Sustainability: TechConnect Briefs 2015Materials for Energy, Efficiency and Sustainability TechConnect Briefs 2015

Materials for Green Building Chapter 7

Photocatalytic activity of commercial TiO2 oxides in the oxidation reaction of nitric oxide

E. Luévano-Hipólito, A. Martínez-de la Cruz, V.M. López-Gallegos, H. Garza-del Bosque
universidad autonoma de nuevo leon, Mexico

pp. 230 - 233

Keywords: NOx, TiO2, heterogeneous photocatalysis

In this work will be explored the potential application of six commercial titanium oxides with different crystalline structures to act as an efficient photocatalyst in the conversion reaction of NOx gases to innocuous products as nitrites or nitrates. For this purpose, six commercial titanium oxides were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), diffuse reflectance spectroscopy (DRS) and nitrogen adsorption-desorption isotherms (BET). The assessment of photocatalytic activity of the oxides was performed in a photocatalytic reactor designed according with the ISO 22197-1. The conversion degree (%) of NO reached by each oxide was associated with their physical properties such as crystalline structure, particle size, and specific surface area. In the same way, the effect of variables such as humidity relative, and charge of photocatalyst was also studied. Titanium dioxide can be incorporated as raw material in large applications such as cement, asphalt, ceramic tiles, glass, and paints. Due to these materials are usually applied over surfaces exposed to sun light irradiation, this technology can be considered to the development of new sustainable materials for the industry of construction.