Abstract
The layered double hydroxide (LDH) well known for its ability to intercalate anionic compounds has been prepared conventionally only with bivalent and trivalent cations. In this study, Zn-Ti LDH consisting of bivalent and tetravalent cations was prepared, and reacted with organic monocarboxylic, dicarboxylic and aromatic acids at high or room temperature. XRD patterns of the prepared LDH (Zn-Ti-CO3) showed that interlayer spacing of the LDH was 0.67 nm. The value was small compared to the usual LDH (Zn-Al-CO3) of 0.76 nm in the case of carbonate anion as 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 255degreesC while those in Zn-Al-CO3 decomposed at 230-240degreesC.