Abstract

Large single crystals of CoAPO-5 have been synthesized using 2-diethylaminoethanol (DAE) as a template reagent, at the mole ratio of Al 2O 3:P 2O 5:(0.1–0.4)DAE:18H 2O:0.045CoCl 2, after aging at various temperatures (25, 50, 100, 150°C) for 1 day and heating hydrothermally at 200°C for 72 h. The optimum synthetic conditions for large single crystals of CoAPO-5 are a DAE ratio of 0.2–0.25 and an aging temperature of around 50°C. The average size of the crystals is 230 μm length and 75 μm width. The maximum size is 400 μm length and 150 μm width.

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