Efficiency of Polymeric Membrane Graphene Oxide-TiO₂ for Removal of Azo Dye

Table 2

Band gap energy for some common semiconductor materials [46].

Semiconductors	Band gap energy (eV)
Diamond	5.4
CdS	2.42
ZnS	3.6
ZnO	3.436
TiO2	3.03
CdS	2.582
SnO2	3.54
CdSe	1.7
WO3	2.76
Si	1.17
Ge	0.744
Fe2O3	2.3
PbS	0.286
PbSe	0.165
ZrO2	3.87
Cu2O	2.172