Fig. 5: The dye degradation and the reusability of the DPAS@P-GOM hydrogel.

The reduction of a CR and b MB degraded by DPAS@P-GOM hydrogel. Reduction of c CR and d MB for five successive cycles with the same batch of DPAS@P-GOM hydrogel. SEM images of the freeze-dried e DPAS@P-GOM and f DPAS hydrogel in CR solution for five cycles. g Catalytic activity of the DPAS@P-GOM hydrogel in the redox reaction of CR and NaBH4.