Fig. 8

(a) The variation of removal % as a function of contact time at different initial MO concentration (5–15 mg/L) with 10.0 mg rGO/Ni-BDP nanocomposite at pH 3.0, (b) Effect of the nanocatalyst amount (5–15 mg) on removal efficacy (10 mg/L MO solution, Temperature = 25 °C and pH 3.0).