Noble Metal Free, Visible Light Driven Photocatalysis Using TiO₂ Nanotube Arrays Sensitized by P‐Doped C₃N₄ Quantum Dots

Bulk g‐C 3 N 4 is an earth‐abundant, easily synthesizable, and exceptionally stable photocatalyst with an electronic bandgap of 2.7 eV. Herein, the concepts of P‐doping and size quantization are combined to synthesize highly fluorescent P‐doped carbon nitride quantum dots (CNPQDs) with a bandgap of 2.1 eV. CNPQDs are hosted on anatase‐phase and rutile‐phase TiO 2 nanotube array scaffolds, and examined as photoanodes for sunlight‐driven...