Electrochemical Behavior of Malachite Green in Aqueous Solutions of Ionic Surfactants

Figure 5

Cyclic voltammograms of 5×10⁻⁴ M MG in 0.10 M aqueous solution of KCl at various concentrations of surfactants. (a) Cyclic voltammograms of MG in the presence of CTAB. Concentrations of CTAB (from I to VI): 0, 0.25×10⁻³, 0.5×10⁻³, 1.0×10⁻³, 5×10⁻³, 7.5×10⁻³ M. (b) Cyclic voltammograms of MG in the presence of SDS. Concentrations of SDS (from I to VI): 0, 1.0×10⁻³, 2.0×10⁻³, 3.0×10⁻³, 4.0×10⁻³, 5.0×10⁻³ M. The scan rate was 0.01 V s⁻¹. Insets show plot of 𝑖¹_pa versus [surfactant].

(a)

(b)