Influence of manganese-substitution on adsorption properties of BiFeO₃ onto the elimination of methyl orange

Herein, the BiFeO3 was modified by substituting varying manganese (Mn) concentration to improve efficacy of eliminating methyl orange (MO), a water-soluble carcinogenic azo dye presented. To examine structure, morphology and band gap characteristics as-synthesised Mn-BiFeO3 nanocatalyst were characterised using various techniques including XRD, FESEM with EDX, FTIR, UV-vis DRS, BET. Subsequently, parameters affecting removal performance, such as adsorbent dosage (0.02–0.10 g), initial concentrations (10–60 mg/L), pH (1–13), percentage mol substitution (0–30%), reusability adsorbent, examined in detail. The specific surface area increases doping from 6.829 13.063 m2/g, leading enhanced adsorption capacity manganese-substituted opposed pristine BiFeO3. Adsorption kinetics found follow pseudo-second-order kinetic model, while equilibrium data obeyed Freundlich isotherm model maximum 25.2 mg/g at 298 K. Interestingly, catalyst showed more than 95% even after three consecutive cycles therefore could be good candidate for wastewater remediation.