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Kinetics of p-Nitrophenol Reduction Catalyzed by PVP Stabilized Copper Nanoparticles

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Abstract

Copper nanoparticles (CuNPs) in aqueous medium were prepared with alkaline hydrazine hydrate as the reductant and PVP as the stabilizing agent without any inert gas protection. Careful variation in the amount of reductant resulted in formation of two stable CuNPs dispersions with different average sizes and consequently different localized surface plasmon resonance absorbances. These two as-synthesized CuNPs dispersions were used to catalyze the model p-nitrophenol reduction reaction. The kinetics of reduction was monitored as a function of concentration and temperature of reactants. Using this we determined the activation energy, pre-exponential factor and the entropy of activation for the two types of CuNPs samples. Catalytic activities of the CuNPs were found to be affected mainly by their activation energies.

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Acknowledgments

One of the authors (ADV) acknowledges financial support received from UGC in form of JRF. The authors are thankful to Department of Chemistry, Banaras Hindu University for permitting the use of FTIR Spectrophotometer. TEM images were recorded at the Electron microscope facility of Department of Metallurgical Engineering IIT (BHU). The authors also acknowledge the use of characterization facilities at unit of Nanoscience and Technology on BHU campus.

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Authors and Affiliations

  1. Department of Chemistry, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India

    A. D. Verma & I. Sinha

  2. Department of Metallurgical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India

    R. K. Mandal

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  1. A. D. Verma
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  2. R. K. Mandal
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  3. I. Sinha
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Correspondence to I. Sinha.

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Verma, A.D., Mandal, R.K. & Sinha, I. Kinetics of p-Nitrophenol Reduction Catalyzed by PVP Stabilized Copper Nanoparticles. Catal Lett 145, 1885–1892 (2015). https://doi.org/10.1007/s10562-015-1605-5

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  • DOI: https://doi.org/10.1007/s10562-015-1605-5

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