“…12,26 This is because their large specic surface areas enhance rapid diffusion of reactants and products and expose more active sites for catalytic reactions thereby enhancing performance. 27,28 Several researchers have also reported enhanced visible light utilization in highly porous nanostructures because the light bounces back and forth in the cavities allowing more time for absorption and the photoinduced carriers have a higher mobility inhibiting charge recombination. 29,30 However, till date, harvesting solar light in the entire spectrum (UV to NIR) has still not been fully solved and the practical application of TiO 2 under solar irradiation remains unrealized.…”