Design of novel M(MnNi)V2O6 NPs via combution synthesis for photocatalytic performance on dual dye and dopamine biosensing

Abstract

Herein M(MnNi)V2O6 have been synthesized by a simple and eco-friendly combustion method using dry butterfly pea flowers. The structural, optical, and morphological properties of the Nanoparticles (NPs) were characterized by XRD, FTIR, SEM with EDAX, TEM UV–visible spectroscopy, PL, BET, and. The average crystallite size of M(MnNi)V2O6 from the XRD pattern was found to be 44 nm with single phase. The functional groups present and metal to oxygen bonding of M(MnNi)V2O6 observed in FTIR. SEM shows aggloramated structure for all the ratios of M(MnNi)V2O6 and edax confirm the presence of all the elements, TEM micrograph of M(MnNi)V2O6 shows indicated the hexagonal, pentagonal, and spherical particle. The UV-DRS shows the energy band gap of 2.18 eV, 1.86 eV, 2.04 eV respectively for the for various fuel ratios (1:0.5,1:1,1:1.5) of prepared sample and luminescence spectrum shows blue emission having an emission of 297 and 300 nm. From the BET surface area analysis, total pore volume (VP) and mean pore diameter (rp) was absorbed to be 1.105 m2g-1, 0.004 cm3g-1 and 1.29 nm. The characterized NPs were applied for photocatalytic dye degradation and electrochemical activity. In dye degradation, impact of catalyst load (10–40 mg), pH of the solution (2−12), concentration of dye (5–15 ppm) under visible light at room temperature was investigated on both cationic dye methylene blue (MB) and anionic dye Rose Bengal (RB). These NPs were successfully applied for the detection of dopamine (DA) at micro molar concentration level and it shows an excellent sensing performance.