Chitosan-mediated synthesis of flowery-CuO, and its antibacterial and catalytic properties

Gownolla Malegowd Raghavendra; Jeyoung Jung; Dowan Kim; Jongchul Seo

doi:10.1016/j.carbpol.2017.04.070

Chitosan-mediated synthesis of flowery-CuO, and its antibacterial and catalytic properties

Gownolla Malegowd Raghavendra, Jeyoung Jung, Dowan Kim, Jongchul Seo

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Abstract

In the current investigation, CuO with a flower-like morphology has been successfully synthesized in situ in a chitosan medium (0.0015 g mL⁻¹) from copper nitrate (Cu(NO₃)₂·3H₂O) 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 0.183 min⁻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.

Original language	English
Pages (from-to)	78-84
Number of pages	7
Journal	Carbohydrate Polymers
Volume	172
DOIs	https://doi.org/10.1016/j.carbpol.2017.04.070
Publication status	Published - 2017 Sept 15

Bibliographical note

Publisher Copyright:
© 2017 Elsevier Ltd

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1016/j.carbpol.2017.04.070

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title = "Chitosan-mediated synthesis of flowery-CuO, and its antibacterial and catalytic properties",

abstract = "In the current investigation, CuO with a flower-like morphology has been successfully synthesized in situ in a chitosan medium (0.0015 g mL−1) from copper nitrate (Cu(NO3)2·3H2O) 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 0.183 min−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.",

author = "Raghavendra, {Gownolla Malegowd} and Jeyoung Jung and Dowan Kim and Jongchul Seo",

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AU - Raghavendra, Gownolla Malegowd

AU - Jung, Jeyoung

AU - Kim, Dowan

AU - Seo, Jongchul

PY - 2017/9/15

Y1 - 2017/9/15

N2 - In the current investigation, CuO with a flower-like morphology has been successfully synthesized in situ in a chitosan medium (0.0015 g mL−1) from copper nitrate (Cu(NO3)2·3H2O) 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 0.183 min−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.

AB - In the current investigation, CuO with a flower-like morphology has been successfully synthesized in situ in a chitosan medium (0.0015 g mL−1) from copper nitrate (Cu(NO3)2·3H2O) 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 0.183 min−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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Chitosan-mediated synthesis of flowery-CuO, and its antibacterial and catalytic properties

Abstract

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