Điều chế nano -MnO2 theo phương pháp phản ứng pha rắn giữa KMnO4 và Mn(CH3COO)2.4H2O có mặt NaCl làm chất phân tán

Abstract

Single-crystal a-MnO₂ nanoneedles have been synthesized  by a solid state reaction of KMnO₄ and Mn(CH₃COO)₂.4H₂O at room temperature with sodium chloride salt as a dispersant. The main manganese oxidation state, crystal structure and morphology of the synthesized products were examined by chemical ananlysis, XRD, SEM, TEM, …methods. The results show that a-MnO₂ nanoneedles with diameters of 10 -20 nm and lengths of a few hundred nanometers were prepared in high yeild (> 95%). Mean S_BET of 162 m²/g was achieved for the a-MnO₂ products. It has also established that the existence of crystalline NaCl as a dispersant was the important factor effecting to the growth of a-MnO₂ crystals.