“…Titanium oxide is well known as a material with an excellent photocatalytic activity and has been investigated for producing hydrogen by photocatalytic water splitting (Fujishima and Honda, 1972). Furthermore it has been applied in photocatalysis such as NOx removal, water purification and decomposition of pollutants and also catalytic reactions for hydrogen generation (Fujishima et al, 1972;Hoffmann et al, 1995;Zhao et al, 1998;Barka et al, 2011;Nazir et al, 2003). Titanium oxide also has high stability, biological and chemical inertness, strong oxidizing power, non toxicity and long term stability against photo and chemical corrosion (Fujishima et al, 1972;Hoffmann et al, 1995;Zhao et al, 1998).…”