Photocatalytic Improvement under Visible Light in Nanoparticles by Carbon Nanotube Incorporation

Table 2

Effect of various calcination temperatures on nanostructure and band gap energy of CNT/TiO₂ nanocomposites at the ratio of 0.05 : 1.

Sample	Crystallite size; (nm)	(nm)	Band gap energy; (eV)
TiO2	30.2	440	2.8
CNT/TiO2_300°C	22.2	760	1.6
CNT/TiO2_350°C	25.6	760	1.6
CNT/TiO2_400°C	27.7	755	1.6
CNT/TiO2_500°C	33.3	750	1.7