Carbon-doped titanium dioxide nanoparticles for visible light driven photocatalytic activity

This work reports tuning of the band gap of the titanium dioxide (TiO2) nanoparticles by carbon doping during sol-gel synthesis. Herein, polydiallyldimethylammonium chloride (PDADMAC), a cationic polymer has been used as the carbon source. The band gap, microstructure and the phase of the synthesized TiO2 can be engineered by controlling the concentration of PDADMAC. A significant reduction in the band gap energy from 2.96 eV to 2.37 eV was...