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采用甲烷气体还原锰矿、溶解和水热沉淀方法制备MnO2纳米棒。甲烷气体还原反应在850、875、900、925和950℃下进行120min,生成α-MnO2纳米棒的沉淀反应在25～90℃下进行90min。采用SEM和X射线衍射对制备的产物形貌和颗粒尺寸进行表征。采用比表面分析仪测定产物的BET和BJH值。结果表明,在反应温度950℃下,MnO相大量生成,而MnO2相消失。所制备的α-MnO2纳米棒的平均直径约为50mm,其BET比表面积为174m2/g。
MnO2 nanorods were prepared by methane gas reduction of manganese ore, dissolution and hydrothermal precipitation. The methane gas reduction reaction was carried out at 850, 875, 900, 925 and 950 ° C for 120 min, and the precipitation reaction of α-MnO2 nanorods was performed at 25 to 90 ° C for 90 minutes. The morphology and particle size of the prepared product were characterized by SEM and X-ray diffraction. The BET and BJH values of the products were determined using a specific surface analyzer. The results show that at the reaction temperature of 950 ℃, the MnO phase is formed in a large amount, while the MnO2 phase disappears. The prepared α-MnO2 nanorods had an average diameter of about 50 mm and a BET specific surface area of 174 m 2 / g.