甲醇直接还原高锰酸钾制备纳米Mn_3O_4  

Preparation of Mn_3O_4 through Direct Reduction of Potassium Hypermanganate by Methyl alcohol

作　　者：贾攀锋 池永庆[1] 李鹏[1] 苏深[1] 王远洋[1] 

机构地区：[1]太原科技大学,太原030024

出　　处：《太原科技大学学报》2017年第2期147-151,共5页Journal of Taiyuan University of Science and Technology

基　　金：山西省自然基金(2012011008-4);山西省青年基金(2015021042)

摘　　要：甲醇作为一种极易被氧化的物质目前在国内产能严重过剩,是一种优良易得的化工原料。基于此,以CH_3OH和KMnO_4为反应物,采用常压水溶液沉淀法滴加甲醇于高锰酸钾水溶液中反应2 h,控制反应温度70~90℃合成了Mn_3O_4.用XRD和SEM对合成的固体产物进行了表征,结果显示为纯度和结晶度很高的Mn_3O_4纳米颗粒,平均粒径约为60nm。采用紫外-可见分光光度仪,FT-IR光谱仪对合成反应后液相进行了分析,结果表明液相中含有大量CO_3^(2-)存在,说明CH_3OH被氧化成为了CO_2(CO_3^(2-)).并在实验的基础上对该反应形成Mn_3O_4的反应机理进行了分析。Methyl alcohol is an easily-oxidized substance and also an easily available industrial chemicals, of which the domestic production capacity is surplus. Based on the above situation, a simple aqueous solution precipitation route to synthesize Mn3O4 nanoparticles with CH3OH and KMnO4 was studied in this research. The solid product was found to be Mn3O4 nanoparticles by X-ray diffraction （XRD） and scanning transmission electron microscopy （SEM）. The results show that the Mn3O4 nanoparticles have high purity and crystallization, and the average parti- cle size is about 60 nm. The liquid products is testified by Uv-Vis and FT-IR Spectrometer, showing that CH3OH is oxidized to CO2 （CO2- ）. The reaction mechanism for the formation of Mn3O4 is proposed based on the experi- ment.

关 键 词：CH3OH 水溶液沉淀法 Mn3O4纳米颗粒 反应机理 

分 类 号：TQ152[化学工程—电化学工业]