Fig. 2: Characterization of BSA/Bi2WO6/g-C3N4/GA nanocomposites with low (A) and appropriate (B) cross-linking degrees.

A Scanning electron micrograph at different scales and elemental mapping of BSA/Bi2WO6/g-C3N4/GA coated electrodes at low crosslinking degree between BSA and g-C3N4. Two sets of prepared samples were analyzed. B Scanning electron micrographs of BSA/Bi2WO6/g-C3N4/GA coated electrodes at appropriate cross-linking degrees at different scales and elemental mapping. Two sets of prepared samples were analyzed. C XPS graphs of BSA/Bi2WO6/g-C3N4/GA at different crosslinking degrees.