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Synthesis of LDH and supported MMOs

https://doi.org/10.1039/C9DT03913A

“All of the chemicals, Ca(OH)2, Al(OH)3 and 1-adamantanecarboxylic acid were purchased from Sigma Aldrich and were used as received. Deionised water (18 MΩ cm resistivity, Millipore water purification system) was used throughout the experiments. Adamantanecarboxylate intercalated with Ca–Al (Ca/Al = 2) was synthesized by employing a co-hydration method. In a typical experiment, stoichiometric amounts of Ca(OH)2 (0.008 moles, 0.625g), Al(OH)3 (0.004 moles, 0.328 g) and 1-adamantanecarboxylic acid (0.004 moles, 0.7579 g) (Al/adamantanecarboxylate = 1) were taken up in 100 mL of water. The reaction mixture was stirred at room temperature for an hour to obtain a homogeneous mixture. The resultant reaction mixture was transferred to a Teflon lined vessel and was hydrothermally treated at 110 °C for 24 h. The resultant LDH was recovered by filtration followed by drying at 65 °C overnight. The carbon-supported MMOs was synthesized by decomposing the Ca–Al-adamantanecarboxylate LDH under an inert N2 atmosphere. In a typical experiment, 1 g of Ca–Al-adamantanecarboxylate LDH was loaded into a quartz tube and was subjected to decomposition at 700 °C under a N2 atmosphere (N2 [99.99% purity] flow rate of 100 mL min−1, ramp rate 10 °C min−1, residence time 2 h).”

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