隧道型α-MnO2的制备及其对K^＋离子选择性吸附性能

Fabrication of α-MnO_2 with a Tunnel Structure and Selective Adsorption for K^+ Ions

应用水热氧化还原法合成了2×2隧道结构α-MnO2。α-MnO2试样在0.5 mol/L HCl溶液中酸处理4 d,转换为具有离子交换能力的H-α-MnO2试样。以H-α-MnO2试样为吸附剂,在质量分数为0.9%盐水溶液中,进行了H-α-MnO2试样对K+离子选择性吸附性能实验研究。结果表明,盐水溶液中92%的K+离子被H-α-MnO2选择性吸收,而吸附剂结构没有受到破坏。

α-MnO2 with a tunnel structure was fabricated via a hydrothermal oxidation-reduction method.When α-MnO2 was treated in a 0.5 mol/L HCl solution for 4 days,it was transformed into H-α-MnO2.The obtained H-α-MnO2 sample was soaked in a 0.9% NaCl solution for 4 days.92% of K^＋ ions in the solution was selectively adsorbed,while the structure of α-MnO2 was not changed.