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Chitosan-mediated synthesis of flowery-CuO, and its antibacterial and catalytic properties.
Carbohydrate Polymers 2017 September 16
In the current investigation, CuO with a flower-like morphology has been successfully synthesized in situ in a chitosan medium (0.0015gmL-1 ) from copper nitrate (Cu(NO3 )2 ·3H2 O) and ammonia solution via a facile microwave-induced method. The as-prepared CuO was characterized by SEM, TEM, EDX, XRD, FTIR and TGA. The antibacterial activity of the flower-CuO against Escherichia coli was examined by analyzing colony forming units, and it was proved that the flower-CuO was able to kill >99% bacteria. Further, the flower-CuO exhibited excellent catalytic activity towards the reduction of 4-nitrophenol to 4-aminophenol in the presence of NaBH4 . The reaction kinetics followed a pseudo-first-order rate law with a rate constant of 0.183min-1 . To the best of our knowledge, this is the first time that copper oxide with the flower-like morphology has been synthesized by using a chitosan solution.
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