Synthesis and Characterization of MnO2 Nanowires: Lattice Vibrations and Photoluminescence Properties

Abstract

In this paper, 1D single-crystalline MnO2 nanowires have been synthesized using facile hydrothermal growth method using KMnO4 and Na2S2O8 as starting reaction reagents. The morphology, phase structure and composition of the as-prepared nanomaterial were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) with selected area electron diffraction (SAED), and energy dispersive X-ray spectroscopy (EDX). FESEM and TEM analysis shows that the as-prepared MnO2 nanowires have diameters of 25–35 nm. The structural features of as-synthesized MnO2 nanowires are studied to analyze the near-neighbor environment of oxygen coordination around manganese cations using Raman scattering (RS) spectroscopy. Photoluminescence Spectrophotometer was employed to study the optical properties of the synthesized material at room temperature which exhibits prominent emission bands located in green-violet spectral region.