Effect of calcination temperature, pH and catalyst loading on photodegradation efficiency of urea derived graphitic carbon nitride towards methylene blue dye solution.

Firstly, when calcination temperature was raised from 450 to 550 °C, the band gap energy showed a decreasing trend from 2.77 to 2.72 eV, this could be because of increased degree of polymerisation of g-C 3 N 4 , resulting in increase of π-plane conjugation degree of heptazine rings via N 2 atoms. 42 When temperature was further raised to 650 °C, a blue shift in absorption edge was observed and band gap energy increased to 2.83 eV.

also in 47,180 other papers