Double Walled Carbon Nanotube/TiO₂ Nanocomposites for Photocatalytic Dye Degradation

Table 1

Average crystallite sizes and band gaps.

Sample	Crystallite size (nm)	Direct band gap (eV)
NC-1	10.9	2.40
NC-2	10.6	2.70
NC-3	10.3	3.15
NC-4	11.8	2.65
NC-5	10.5	3.34
NC-6	11.6	3.36