Fig. 7

(a) Pseudo-first-order model, (b) pseudo-second-order model kinetics of the photodegradation of MB using CuO and CuO-OP NPs and (c) mechanism of photocatalytic degradation of MB.

(a) Pseudo-first-order model, (b) pseudo-second-order model kinetics of the photodegradation of MB using CuO and CuO-OP NPs and (c) mechanism of photocatalytic degradation of MB.