Experimental study on the bandgap narrowings of TiO2 films calcined under N2 or NH3 atmosphere
Keywords: فوتوکاتالیست قابل مشاهده نور; 78.67.Bf; 61.72.Vv; 81.16.Hc; 81.40.Ef; Titanium dioxide; Calcination; Visible-light photocatalyst; Nitrogen-doping;