Applied Surface Science, Vol.479, 1-11, 2019
Potassium doped graphitic carbon nitride with extended optical absorbance for solar light driven photocatalysis
In this study, the structural distortion of graphitic carbon nitride (g-C3N4) has been done through potassium salt tempting towards an extended optical absorbance. Optical and morphological studies affirm that the potassium doping stimulate n - pi* electronic transition ascribing towards a diminished charge recombination, high conduction band edge, and a narrow band gap. A comparative photocatalytic study of potassium doped g-C3N4(0.8 K+-g-C3N4) with g-C3N4 has been performed through a solar-powered photocatalytic reactor to treat phenolic effluent, and the effect of operational parameters i.e. solar irradiance, pH, H2O2 concentration, and flow rate was also examined. It was observed that 0.8 K+ - g-C3N4 shows 89.06% decomposition of phenol while with g-C3N4 exhibits 63.53% under optimum conditions.