Abstract
Hydrocalumite (CaAl-Cl-LDH) has the similar structure to layered double hydroxide (LDH). The effects of Na-dodecylsulfate (SDS) on the structure, morphology, and thermal property of CaAl-Cl-LDH have been investigated. Through ion exchange, CaAl-Cl-LDH had been modified with SDS at two concentrations: 0.005 mol L−1 and 0.2 mol L−1. Two different adsorption behaviors were observed through Fourier transform infrared (FTIR) spectra and X-ray diffraction (XRD) patterns. When the SDS concentration was 0.005 mol L−1, surface anion exchange was the major process. When the SDS concentration was 0.2 mol L−1, anion exchange intercalation occurs, with the interlayer distance expanded to 3.25 nm, and the particle morphology from regular hexagons to irregular platelets. The thermal analysis (TG–DTA) showed that dehydration and dehydroxylation occur at a lower temperature when hydrocalumite was intercalated with dodecylsulfate. All these observations revealed that the property of CaAl-Cl-LDH has been changed by SDS modification.
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Acknowledgements
The authors gratefully acknowledge Dr. Xu of the Australian Research Council for the ARC Centre of Excellence for Functional Nanomaterials. This project is financially supported by National Nature Science Foundation of China No. 20907029 and No. 20877053, Shanghai Leading Academic Discipline Project No. S30109.
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Zhang, P., Shi, H., Xiuxiu, R. et al. Na-dodecylsulfate modification of hydrocalumite and subsequent effect on the structure and thermal decomposition. J Therm Anal Calorim 104, 743–747 (2011). https://doi.org/10.1007/s10973-010-1001-8
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DOI: https://doi.org/10.1007/s10973-010-1001-8