Synthesis and Characterization of Cu2FeSnS4–Cu2MnSnS4 Solid Solution Microspheres

Abstract

In this study, we used a hydrothermal method to synthesize microspheres of Cu2(Mn1−xFex)SnS4 solid solution (X = 1, 0.8, 0.6, 0.4, 0.2, 0). The process was optimized to improve the crystallinity, morphology, and purity of the obtained materials. All samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), Raman spectroscopy, and Fourier transform infrared (FTIR) spectroscopy. The following conditions were optimized: A mixture of water and ethylene glycol at the ratio of 1:7 as the reaction medium, polyvinylpyrrolidone (PVP) as the surface ligand, and reaction temperature of 195 °C for 7 days. The product of synthesis precipitated in the form of aggregates of nanocrystals, which form homogeneous, often concentric microspheres with a diameter of 1–1.5 μm. The chemical composition of the product can be well controlled by the chemical composition of the reactants. The compound Cu2(Mn1−xFex)SnS4 forms a continuous series of solid solutions.

Quaternary Cu2FeSnS4/PVP/rGO Composite for Supercapacitor Applications

“…The peak at 3467 cm −1 is attributed to O−H stretching vibration of H 2 O. 26 The identification of the various compositional phases of the synthesized material has been revealed through the Raman studies (Figure 2). The characteristic Raman vibrational modes are observed at 144, 214, 476, and 2116 cm −1 .…”

“…The carbondioxide peak is revealed at 2368 cm –1 . The peak at 3467 cm –1 is attributed to O–H stretching vibration of H 2 O …”