in this scientific research, mno2 nanoparticles (nps) have been successfully prepared by a precipitation method using kmno4, mnso4.h2o and h2o2 (30%) as the precursors. as-prepared sample was identified by x-ray diffraction (xrd), scanning electron microscopy (sem), transmission electron microscopy (tem) and infrared (ir) techniques. the transmission electron microscopy (tem) showed 7-8 nm rang...