Fig. 1.

(A–B) SEM image of CuTA nanozyme. (C) TEM image of CuTA nanozyme. (D) FTIR of CuTA, Cu and TA. (E) XRD of CuTA. (F) Thermogravimetry analysis of CuTA, Cu and TA. (G) Transition before and after gelation of SF, Cu@SF, TA@SF, CuTA@SF hydrogels. (H) Microstructure of lyophilized SF, Cu@SF, TA@SF, CuTA@SF hydrogels from SEM images. (I) The pore size of SF, Cu@SF, TA@SF, CuTA@SF hydrogels was quantified from SEM images with ImageJ. (J) The porosity of SF, Cu@SF, TA@SF, CuTA@SF hydrogels. Results were shown as mean ± SD, ****p < 0.0001.