“…As an excellent adsorbent, TiO 2 also enjoys a vast range of potential applications in photocatalysis [4][5][6], photovoltaics [7,8] and water splitting [9], either in its pristine form or as a composite with a variety of nanoparticles. Noble metals including Au [19] and Ag [20,21], magnetic particles such as Ni [22] and ferrites [23], quantum dots [24], hydroxyapatites [25] and various oxides (e.g. alumina [26], zirconia [27], silica [28] and NiO [29]) have been successfully incorporated on titania particles, rods, wires or mesh-like structures.…”