摘要
用小角度X射线衍射法（SAXS）研究了δ-MnO2固体及其与铜离子交换后的分数维数．新制备的固体是典型单分散系统，表面与孔结构均匀．在不同pH值的水溶液中再分散后，δ-MnO2固体离子分维发生变化．研究了铜离子与固体颗粒的交换等温线，在较大的浓度范围内符合Frendlich吸附．通过SAXS研究发现，与铜离子交换后δ-MnO2的分数维数发生变化．根据离子交换机理，由于吸附交换作用，交换剂的表面结构发生变化，并出现复合分维．推断吸附后的表面是多层的．
The fractal dimensions of δ-MnO_2 particles that are (or not) exchanged with copper ion are determined by small angle X-ray scatter method. It is found that the fractal dimensions are changed after exchanged with copper ion. Compared with the mechanism of ion exchange, it is believed the surface structure of the exchanger is changed with adsorption and the surface fractals have multiple dimensions. We concluded that the adsorbed surface is multi-layers.
出处
《河北工业大学学报》
CAS
1999年第4期35-38,共4页
Journal of Hebei University of Technology
基金
天津市青年自然科学基金!973701311
关键词
分形
铜离子
吸附交换
固体颗粒
δ-MnO_2, Particle Surface, Fractal, Copper ion, Adsorption and Exchange
