Silver/Carbon Codoped Titanium Dioxide Photocatalyst for Improved Dye Degradation under Visible Light

Table 2

Band gaps of undoped TiO₂, Ag doped TiO₂, and Ag/C codoped TiO₂ with different contents of Ag.

Sample	Band gaps from Tauc plots
Undoped TiO2	3.06
Ag doped TiO2	2.90
C-doped TiO2 (0.0% Ag)	2.77
Ag/C codoped TiO2 (0.2% Ag)	2.83
Ag/C codoped TiO2 (0.5% Ag)	1.95
Ag/C codoped TiO2 (0.7% Ag)	2.53
Ag/C codoped TiO2 (1.0% Ag)	2.72