Table 2. Summary of Rate Constant and Percentage Dye Degradation of DB15.

	absorbance (λ = 603 nm)				retention rate (100%)
catalyst	DB15 (50 mg/L)	0 min	18 min	degradation rate (100%)	0 min	18 min	first-order rate constant (min–1)
G-AgNPs	0.7623	0.1704	0.0301	82.34	22.35	3.95	0.128
C-AgNPs		0.1326	0.0823	37.93	17.39	10.80	0.0374
control		0.2615	0.2058	21.30	34.30	27.00	0.0165