Sol-Gel-Hydrothermal Synthesis of the Heterostructured TiO_𝟐/N-Bi_𝟐WO_𝟔 Composite with High-Visible-Light- and Ultraviolet-Light-Induced Photocatalytic Performances

Table 4

Estimation of the band gap energy of the as-prepared samples.

Sample	Band gap energy (eV)
H-TiO2	2.92
BWO	2.67
N-BWO	2.60
TiO2/N-BWO	2.75
TiO2/N-BWO-400/1 h	2.73
TiO2/N-BWO-400/2 h	2.71