Facile hydrothermally synthesized mesoporous manganous stannate (Mn₂SnO₄) nanoparticles and its electrochemical properties

Cubic spinel phase mesoporous Mn₂SnO₄ nanoparticles (NPs) were successfully prepared by a facile hydrothermal method. The formations of Mn₂SnO₄ NPs were characterized by thermo gravimetric/differential thermal (TG/DT) analysis. The understanding of TG/DT analysis prepared NPs were calcinated at different temperature and investigated through x-ray diffraction (XRD) patterns. XRD analysis confirms the Mn₂SnO₄ NPs has spinel cubic phase and evaluated mean crystalline size ∼30 nm. The calcinated sample at 850 °C was optimized and chosen for the further investigations. The surface morphology of Mn₂SnO₄ NPs was analyzed by field emission-scanning electron microscope (FE-SEM) and high resolution-transmission electron microscope (HR-TEM) analysis which indicates Mn₂SnO₄ NPs were in nearly spherical shaped. Energy dispersive spectroscopy (EDS) analysis revealed the presence of Mn, Sn and O elements. The stability of the Mn₂SnO₄ NPs analyzed through dynamic light scattering (DLS) measurements which shows good stability. The surface area of the Mn₂SnO₄ NPs ∼38.747 m² g⁻¹ measured through Brunauer–Emmett–Teller (BET) method. In the present investigation, cyclic voltammetry (CV) measurements exhibits superior specific capacitance value 540 Fg⁻¹ at a scan rate of 2 mV s⁻¹ from the result, Mn₂SnO₄ NPs could be a potential and novel electrode material for super capacitance applications. (paper)