Catalyst

0.02 g

Concentration of dye (M)

k∙sec⁻¹

Time taken for complete degradation (min)

COD values in mg/L

Degradation efficiency %

Before degradation

After degradation

ZnS

0.2 × 10⁻⁴

1.34 × 10⁻⁴

130

352

16

95.4

ZrS₂/ZnS

0.2 × 10⁻⁴

5.29 × 10⁻⁵

290

352

64

81.81