Figure 4
Synergetic catalytic effect and the mechanism of the PANI/Cu9S5 composite nanowires toward the oxidation of TMB.
(a) The time-dependent absorbance changes at 652 nm in the presence of pristine Cu9S5 nanocrystals, PANI nanowires, the physical mixture of PANI nanowires and Cu9S5 nanocrystals and the as-prepared PANI/Cu9S5 composite nanowires in pH 4.0 acetate buffer (0.1 M NaAc-HAc) at room temperature; (b) Comparison of the catalytic activities of PANI nanowires, pristine Cu9S5 nanocrystals, the physical mixture of PANI nanowires and Cu9S5 nanocrystals and PANI/Cu9S5 composite nanowires under the same conditions. The difference of the absorbance between 10 and 0 min stands for the activity and the maximum point was set as 100%. (c) A possible mechanism of the synergetic catalytic effect of the PANI/Cu9S5 composite nanowires toward the oxidation of TMB.
