作者机构：
[Yu, Y] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;Nankai Univ, Coll Environm Sci & Engn, Tianjin 300071, Peoples R China.;Cent China Normal Univ, Chem Coll, Wuhan 430079, Peoples R China.
通讯机构：
[Yu, Y] C;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.
摘要：
A novel resin NKZ, which is a macroporous resin intermediate modified with nitroguanidine, was synthesized and identified. The adsorption behavior of five kinds of water-soluble dyes onto the resin NKZ was investigated thermodynamically in detail. The results showed that the adsorption rate for reactive brilliant blue KN-R is higher than those for the other dyes. The equilibrium data can be well-described by a three-parameter equation. The values of ΔG° demonstrate that the first layer adsorption of the dyes onto NKZ involves both physical adsorption and chemisorption but multilayer adsorption is a physical one. Both the values of ΔH° and ΔS° on the adsorption of reactive brilliant blue KN-R onto NKZ was positive, indicating that the adsorption is endothermic and can occur spontaneously. The apparent activated energy (Ea) of the adsorption process was 16.84 kJ/mol, which shows that there is a great potential barrier for adsorption.
期刊：
Journal of Applied Electrochemistry,2003年33(8):755-758 ISSN：0021-891X
通讯作者：
Li, J
作者机构：
[Li, J] Cent China Normal Univ, Nano Sci & Technol Res Ctr, Wuhan 430079, Peoples R China.;Xiaogan Coll, Dept Chem, Xiaogan 432100, Peoples R China.
通讯机构：
[Li, J] C;Cent China Normal Univ, Nano Sci & Technol Res Ctr, Wuhan 430079, Peoples R China.
摘要：
A new technique for purifying carbon nanotubes utilizing anodic oxidation in a SPE cell was developed. On the basis of TEM observations, TG-DTA graphs and Raman analysis, it was found that most of the carbonaceous impurities were removed from the roots without significant damage to the bundles. SPE electrolysis can be carried out in pure water, compared with the widely used HNO<inf>3</inf> oxidation process, this process demands less subsequent washing and separation steps.
