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

Table 1

Kinetics studies of the photocatalytic degradation of SR by the prepared photocatalysts.

Catalysts	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
HA_Ag3PO4(a)	0.5	0.00133	0.99782	0.00515	0.99821	0.03895	0.58407
HA_Ag3PO4(b)	0.5	0.00373	0.98861	0.02178	0.98989	0.0294	0.944
HA_Ag3PO4(c)	0.5	0.0055	0.89646	0.07168	0.98209	0.16905	0.92962