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Table 2 Kinetics equation and parameters of MV photocatalysis and photooxidation using varied photocatalysts

From: Functionalization of hydroxyapatite derived from cockle (Anadara granosa) shells into hydroxyapatite–nano TiO2 for photocatalytic degradation of methyl violet

Photocatalyst

Photocatalysis

Photooxidation

Initial rate (mg L− 1 min− 1)

k (min− 1)

R2

Initial rate (mg L− 1 min− 1)

k (min− 1)

Kinetics equation (R2)

HAp

1.9

4.5 × 10− 3

0.9991

2.8

6.9 × 10− 3

0.9988

HAp-nTiO2

7.3

4.1 × 10− 2

0.9917

7.7

4.6 × 10− 2

0.9778

TiO2

7.7

5.5 × 10− 2

0.9688

7.9

9.5 × 10− 2

0.9770