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Table 1 The band gap (E _g,) values of undoped and doped with urea TiO₂ and iron titanate films

From: Non-porous Iron Titanate Thin Films Doped with Nitrogen: Optical, Structural, and Photocatalytic Properties

Film	TiO₂	N/TiO2	Fe_xTi_yO_z		N/Fe_xTi_yO_z
T, °C	450	450	450	500	450	500
E _g, eV	3.5	3.4	2.2; 2.5	2.3; 2.7	2.1; 2.5	2.2; 2.5

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