ABSTRACT
The degradation of chemicals present in wastes by heterogeneous photocatalysis is an important issue and its study is a constantly growing field. An increasing number of papers deal with TiO2 (titania) as one of the most appropriate semiconductor materials to be employed as a photocatalyst, due to its high activity in the photodegradation of organic compounds, low cost, low toxicity, and chemical stability (Antonelli et al., 1995; Herrann, 2010; Sakthivel et al., 2004; Sclafani et al., 1991; Van Grieken et al., 2002; Wang et al., 1998; Yeung et al., 2003; Yu et al., 2000).
