Figure 2

Effect of ratios of AC and ZVZ on [C4mim][BF4] degradation. ([[C4mim][BF4]] = 1 mmol/L, pH = 3.0 and ultrasound frequency = 45 kHz at 30 °C).

Effect of ratios of AC and ZVZ on [C4mim][BF4] degradation. ([[C4mim][BF4]] = 1 mmol/L, pH = 3.0 and ultrasound frequency = 45 kHz at 30 °C).