Abstract
Elemental doping of titanium dioxide with nitrogen and carbon were investigated in this study to get the modified photocatalyst working under visible light. Doped and codoped photocatalyst samples were synthesized by solgel method using titanium isopropoxide, ammonium nitrate and acetylacetone as precursors with the dopant concentration and calcination temperature fixed at 0.75% and 600°C respectively. Synthesized photocatalysts were characterized by XRD, FTIR and FESEM to check the existence of anatase phase, presence of dopants and formation of fine particles respectively. The effectiveness of the synthesized photocatalysts was measured by performing a standard batch photodegradation test with methylene blue as a model pollutant under ordinary visible light. The photocatalytic degradation efficiencies were found to be affected by the presence of dopant elements. The codoped photoctalyst (N-C-TiO2) exhibited the highest photocatalytic activity as it resulted in 91.3% degradation of methylene blue over 180 minutes of irradiation time.
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