Fig. 6

(A) CVs of the PAR and (B) CVs of the DIC at the GCE (a), GONs/GCE (b), SiO₂NPsNPs/GONs/GCE (c), ZIF-67/GCE(d) and ZIF-67/SiO₂NPsNPs/GONs/GCE (e), respectively. Cyclic voltammetric conditions: scan rate of 100 mV/s for 0.2 mM of PAR and 0.2 mM of DIC in 0.1 M PBS (pH = 7.0).