“…Several recent studies have investigated the utility of coupling TiO 2 to carbon materials, such as carbon nanotubes (CNTs), as an effective way to prevent the aggregation of oxide particles, leading to increased rates of photocatalytic oxidation of pollutants, or to decrease the rate of electron-hole recombination [13][14][15] by acting as sinks for photogenerated electrons in TiO 2 , 16,17 due to the favourable energetics of their electronic band structures, and they have been demonstrated a to have a helpful impact on the photocatalytic activity of H 2 production, by actuating synergies between the metal oxide and the carbon phase. 8,[18][19][20] For example, multi-walled carbon nanotubes (MWCNTs) 9,[21][22][23] and single-walled carbon nanotubes (SWCNTs) 11,24 have been investigated to couple with TiO 2 , and the subsequent photoactivities are without a doubt moved forward. The accessible library of nanostructured catalysts has likewise proven that the combination of three nanomaterials represents a powerful strategy to increase more profoundly the various processes taking place during photocatalysis and, eventually, to increase the efficiency of energy conversion processes.…”