Tailoring of Ag₃PO₄-Anchored Hydroxyapatite Nanophotocatalyst with Tunable Particle Size by a Facile Ion-Exchange Method for Organic Textile Dyes Photodegradation

Table 2

Kinetic studies of HA_Ag₃PO₄(c) of the degradation of different dyes.

Dyes	Catalyst concentration; (g L^−1)	Zero order; C0 − C = k0t		First order; ln (C0/C) = k1t		Second order; (1/C) − (1/C0) = k2t
		k0; (min^−1)	R^2	k1; (min^−1)	R^2	k2; (min^−1)	R^2
Sunfix Red (SR) S3B 150%	1	0.005	0.92857	0.07324	1	0.88889	1
Sunzol Black (SB) DN conc.	1	0.00427	0.74598	0.042	0.92443	0.45961	0.95049
Methylene blue (MB)	1	0.00989	0.821	0.03927	0.98461	0.40652	0.74271
Rhodamine B (RhB)	1	0.01059	0.98678	0.01343	0.93367	0.01983	0.77052
Cocktail (CT)	1	0.00462	0.74382	0.02544	0.96133	0.24373	0.69454