The A n− /CoAl LDH_x precursors with various interlayer anions (A n− ) and Co 2+ to Al 3+ ratios (x) were successfully synthesized using the co-precipitation method under alkaline conditions. The XRD profiles of the as-prepared A n− /CoAl LDH_x resembles the typical pattern of hydrotalcite materials without any presence of impurities. The TG-DTA analysis revealed that different types of interlayer anions led to the formation of LDH with different thermal behavior. The cobalt aluminum oxide nanocomposite, A n− /CoAl_x_T, was obtained after calcination of A n− /CoAl LDH_x at T K for 2 h, and it was applied as a heterogeneous catalyst for aerobic oxidation of 1-phenyl ethanol to acetophenone using molecular oxygen as a sole oxidant. The A n− /CoAl_x_T acted as efficient catalyst for aerobic oxidation of 1-phenyl ethanol.Among The A n− /CoAl_x_T catalysts tested, CO3 2− /CoAl_3_573 gave the most outstanding catalytic performance with the acetophenone yield of 89%.

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