Studies on Preparation, Characterazation and Performance of Ternary Anion Hydrotalcite-like Compounds

摘要

(1) MgAlCu-HTlcs could be prepared when Mg/Al/Cu molar ratios were 5:2:1, 2:1:1 and 1:1:2. Under the same synthetical parameter, MgAlCu-HTlcs were easily prepared and their structure were more regular, dosing amount of copper being less . (2) WP-HTlc and WSi-HTlc were successfully led to W-P-heteropoly acid and W-Si -heteropoly acid in Mg_(2.5)AlCu_(0.5)-HTlc, possessing Keggin-structure. The height of WSi-HTlc interlayer spacing was far more bigger than MgAlCu-HTlc's, being about 1.15nm. (3) Mg_(2.5)AlCu_(0.5)-HTlc and WSi-HTlc could better adsorb nitrogen oxides under the lower temperature, their adsorption capacities were near, and both outwent activated carbon's. The adsorption capacity of WSi-HTlc was maximal, being 1518.7mg/g.