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Issue 37, 2015
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Tuneable ultra high specific surface area Mg/Al-CO3 layered double hydroxides

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Abstract

We report the synthesis of tuneable ultra high specific surface area Aqueous Miscible Organic solvent-Layered Double Hydroxides (AMO-LDHs). We have investigated the effects of different solvent dispersion volumes, dispersion times and the number of re-dispersion cycles specific surface area of AMO-LDHs. In particular, the effects of acetone dispersion on two different morphology AMO-LDHs (Mg3Al-CO3 AMO-LDH flowers and Mg3Al-CO3 AMO-LDH plates) was investigated. It was found that the amount of acetone used in the dispersion step process can significantly affect the specific surface area of Mg3Al-CO3 AMO-LDH flowers while the dispersion time in acetone is critical factor to obtain high specific surface area Mg3Al-CO3 AMO-LDH plates. Optimisation of the acetone washing steps enables Mg3Al-CO3 AMO-LDH to have high specific surface area up to 365 m2 gāˆ’1 for LDH flowers and 263 m2 gāˆ’1 for LDH plates. In addition, spray drying was found to be an effective and practical drying method to increase the specific surface area by a factor of 1.75. Our findings now form the basis of an effective general strategy to obtain ultrahigh specific surface area LDHs.

Graphical abstract: Tuneable ultra high specific surface area Mg/Al-CO3 layered double hydroxides

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Publication details

The article was received on 13 Jul 2015, accepted on 14 Aug 2015 and first published on 26 Aug 2015


Article type: Paper
DOI: 10.1039/C5DT02641E
Dalton Trans., 2015,44, 16392-16398

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    Tuneable ultra high specific surface area Mg/Al-CO3 layered double hydroxides

    C. Chen, A. Wangriya, J. Buffet and D. O'Hare, Dalton Trans., 2015, 44, 16392
    DOI: 10.1039/C5DT02641E

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