New Layered Double Hydroxide,Zn-Ti LDH:Preparation and Intercalation Reactions

摘要

The layered double hydroxide(LDH)well known for its ability to intercalate anionic compounds has been prepared con-ventionally only with bivalent and trivalent catons.In this study,Zn-Ti LDH consisting of bivalent and tetravalent cations was prepared,and reacted with organic monocarboxylic,Dicarbodylic and aromatic acids at high or room temperature.XRD patterns of the prepared LDH(Zn-Ti-CO_3)showed that interlayer spacing of the LDH was 0.67nm.The value was small compared to the usual LDH(Zn-AI-CO_3)OF 0.76nm in the case of carbonate anion asd the guest.Also,DTA,TG and DTG analysis indicated that the electrostatic force between the layers and carbonate anions increased where the carbonate anions in Zn-Ti LDH decomposed at 255 deg C while those in Zn-Al-CO_3 decomposed at 230-240 deg C