KxMnO2的溶胶-凝胶法制备及其表征

以KHCO₃，Mn(Ac)2和柠檬酸（CA）为原料，采用溶胶-凝胶法制备含钾柠檬酸锰配合物凝胶前驱体，煅烧前驱体获得目标产物，并运用XRD，FTIR，SEM等分析手段对产物进行表征.实验结果表明，当n(Mn)∶n(CA)=1，n(K)∶n(Mn)=0.17~0.3，煅烧温度800 ℃时，可以获得一种结构与隐钾锰类似，含有Mn₈O₁₆隧道结构的锰基嵌钾化合物K_xMnO₂晶体，SEM结果显示其微观形貌表现为规则扁平状薄片.

Sol-Gel Preparation and Characterization of K_xMnO_2

The sol-gel preparation and characterization of Mn-based K-intercalating compoundsK_xMnO₂ were investigated.The objected materials were obtained by calcining gel precursors of K-contained manganese citrate complexes through a sol-gel route with using KHCO₃,Mn (Ac)2,and citric acid (CA) as raw materials,and the products were characterized by XRD,FTIR,and SEM.The results show that a crystal of K-intercalating compoundK_xMnO₂ can be obtained which is cryptomelane-like in structure and has the channel structure of Mn₈O₁₆,when n(Mn)∶n(CA)=1，n(K)∶n(Mn)=0.17~0.3,and the calcining temperature is 800 ℃.The SEM image shows that the particles of this crystal compound have flake-like morphologies which are regular and flat.