Investigations on Synthesis, Structural, Morphological and Dielectric Properties of Manganese Oxides Nanoparticles

Nano-sized materials are new substances quickly developed and generally measured as 1 to 100 nm size in one dimension. At a nanometer scale, the surface area increases hastily as particle size decreases, as a result, the electromagnetic, thermal, optical, and mechanical properties of nanomaterials modify. In recent years, manganese oxides (MnO2) have concerned considerable research interest due to their characteristic physical and chemical properties and broad applications such as ion exchange, molecular adsorption, energy storage, catalysis, biosensor [1-3]. Manganese oxides have established application in catalysis, ion exchange reactions, as cathode materials for rechargeable batteries and as distinguish agents for magnetic resonance imaging (MRI). The manganese oxide nanoparticles were used to improve the mechanical and thermal properties of polymers and to enhance the ionic conductivity of polymer electrolytes [4-6]. Manganese oxides take place in a variety of oxidation states and chemical and structural forms. Due to their distinctive properties and wide applications, the synthesis of manganese oxide nanoparticles has been investigated in order to put their chemical composition, structure, size and morphology under control [7,8]. Several novel and effective routes have been devoted to prepare manganese oxides nanomaterials with various shapes and excellent properties, such as hydrothermal method [9-12], sol-gel synthesis [13], wet chemical route [14,15], pulsed laser deposition method [16], and precursor technique [17]. Co-precipitation method offers advantages like, simple and rapid preparative method, easy control of particle size and composition can be made in this method and also, there are various possibilities to modify the particle surface state and overall homogeneity. In the present study, MnO2 nanoparticles were synthesized by co-precipitation method. Present work reports synthesis of MnO2 nanoparticles and its characterization by XRD, SEM, UV-analysis and Dielectric studies.