Synthesis, Characterization, and Investigation of Visible Light Photocatalytic Activity of C Doped TiO₂/CdS Core-Shell Nanocomposite

Table 1

Characteristic properties of photocatalyst.

Sample	Particle size/nm	C/at%	Band gap ()/eV	Reaction parameters
				Rate constant ()/min^−1
Pure TiO2	16.2	—	3.14	0.0045	0.949
C doped TiO2	11.3	13.41	2.86	0.0108	0.995
CdS	6.2	—	1.82	0.0053	0.952
C/TiO2/CdS core-shell	10.5	14.62	2.28	0.0326	0.958

a: particle sizes were obtained from TEM images.
b: C content was obtained from EDX spectra.
c: values were obtained from onset of light absorption edges and values were calculated using Tauc plots.