Synthesis of CdS Sensitized TiO₂ Photocatalysts: Methylene Blue Adsorption and Enhanced Photocatalytic Activities

Table 4

Comparison of the pseudo-first-order, pseudo-second-order adsorption rate constants and calculated and experimental values obtained at 100 mg/L MB concentration for the different photoadsorbents.

Sample		Pseudo-first-order kinetics			Pseudo-first-order kinetics
		TiO2	12.6	0.0789	12.0	0.862	0.0115	13.0	0.529
TCd1	10.5	0.0631	10.2	2.315	0.0088	11.3	1.225
TCd2	12.0	0.0787	11.2	0.753	0.0121	12.1	0.197
TCd3	6.5	0.0499	5.9	0.264	0.0100	6.8	0.186
TCd4	6.3	0.0647	5.6	0.655	0.0167	6.2	0.419

⁢ and have units of mg/g; has units of min⁻¹; has units of g (mg min)⁻¹.