Spontaneous synthesis of gold nanoparticles on gum arabic-modified iron oxide nanoparticles as a magnetically recoverable nanocatalyst

Table 1 Pseudo-first-order rate constants for the reduction of 4-NP with NaBH ₄ in the presence of GAAu-MNP

10² × [Au]₀	10⁴ × [4-NP]	10² × k (min^-1)	Correlation coefficient
(mg/mL)	(M)
0.221	1.5	13.79	0.9871
0.295	1.5	27.88	0.9966
0.369	1.5	36.9	0.9969
0.443	1.5	58.46	0.9987
0.295	0.5	73.87	0.9592
0.295	1.0	38.88	0.9840
0.295	2.0	22.78	0.9957