A robust rationally designed multinarydouble perovskites microplates as an efficient visible-light photocatalyst

Abstract

Rationally designed perovskite structured, multinary oxides having two or more different cations combinations diversify its photocatalytic applications. In current study Rhombohedral structured rationally designed visible light-responsive double perovskites (DPOs) were produced by hydrothermal method. The synthesized perovskites were confirmed by various characterizations techniques. The average crystallite size of the DPOs was found 25 nm calculated from XRD data using Scherer's equation. The EDX images confirmed the elemental composition of the synthesized material. The morphology of the DPOs was smooth, uniform and well organized as regular microplate form as seen in the SEM images. The average length of DPOs was 5.52 μm and the band gap was 2.03 eV, lies in the visible range. The BET results showed that the DPOs had a high specific surface area of 389 m²/g . The point of zero charge of the synthesized materials lies in the basic region at pH 8. The DPOs microplates showed 97% degradation of crystal violet (CV) at optimum conditions of pH 12, 50 ppm initial dye concentration, 0.6 g/L DPOs dosage within 20 min of irradiation contact time, following 2nd order kinetics with 0.9822, R2 value. The ANOVA confirmed that the polynomial quadratic model is best fitted model having high R2, R2 adj, and R2 pred values. In conclusion, the DPOs (Na2FeCoSeNaO6) are the most suitable and efficient entrant as a photocatalyst for dyes eradications.