Calculated parameters of kinetic order rate of RhB degradation on % Bi–BBO NPs.

Bi% excess	First order		Second order
	Rate constant (k1 × 10−2 min−1)	R 2	Rate constant (k2 × 10−2 min−1)	R 2
0% Bi–BBO	0.41	0.9674	0.6291	0.9787
5% Bi–BBO	0.41	0.9223	0.6149	0.8674
10% Bi–BBO	0.39	0.9569	0.5757	0.9123
15% Bi–BBO	0.57	0.9595	1.0951	0.8735
20% Bi–BBO	0.47	0.9762	0.7832	0.9416