Preparation and characterization of ternary cation hydrotalcite-like compounds and their adsorption of NO x

Hydrotalcite-like compounds with different molar ratios of Mg: Cu:Al have been prepared by co-precipitation method and characterized by XRD, IR, TG-DTA. The results show that the samples possess feitknecht structure when Mg:Cu:Al molar ratios are 2.5:0.5:1, 2:1:1 and 1:2:1. W-Si-heteropolyacid pillared hydrotalcite-like compounds have been obtained by ion exchange method. The heteropolyacid pillared hydrotalcite is a crystalloid with highly regular layers. The maximum spacing of interlayer is 1.4786nm. The adsorption capacity of these materials for nitric oxides has also been measured.