Mg-Al layered double hydroxides (Mg-Al LDHs) intercalated with 1,3,6-naphthalenetrisulfonate (NTS3-) and 3-amino-2,7-naphthalenedisulfonate (ANDS2-) ions were prepared by coprecipitation and were characterized by X-ray diffraction and chemical analyses. Based on X-ray diffraction patterns, the naphthalene rings of NTS3- and ANDS2- were most likely oriented parallel to the brucite-like host layers of the Mg-Al LDH, midway between layers. The prepared Mg-Al LDHs were able to selectively take up aromatics from aqueous solutions, and the order of percentage uptake was as follows: 1,3-dinitrobenzene > nitrobenzene > benzaldehyde > N,N-dimethylaniline > anisole > 1,2-dimethoxybenzene. The differences in the extent of π-π stacking interactions occurring between the benzene rings of the aromatics and the naphthalene ring of the intercalated NTS3- and ANDS2- probably resulted in these differences among the absorbed quantities of the various aromatics.
|Number of pages||6|
|Journal||Solid State Sciences|
|Publication status||Published - 2010 May|
- Magnesium-aluminum layered double hydroxide
- Selective uptake