Preparation and Characterization of Copper Nanoparticles Stabilized by Poly(vinyl alcohol) for Catalytic Oxidation of 1-Propanol

Authors

  • Kuralay Maksotova Al-Farabi Kazakh National University, Almaty, Kazakhstan https://orcid.org/0000-0001-8606-5005
  • Dina N. Akbayeva Institute of Polymer Materials and Technology, Almaty, Kazakhstan
  • Botagoz Bakirova Al-Farabi Kazakh National University, Almaty, Kazakhstan
  • Akerke Serikkyzy Al-Farabi Kazakh National University, Almaty, Kazakhstan
  • Bexultan Lesbek Al-Farabi Kazakh National University, Almaty, Kazakhstan
  • Gulnur Tatykhanova Satbayev University, Almaty, Kazakhstan https://orcid.org/0000-0003-4457-1705
  • Sarkyt Kudaibergenov Institute of Polymer Materials and Technology, Almaty, Kazakhstan https://orcid.org/0000-0002-2879-6448

DOI:

https://doi.org/10.31489/2959-0663/3-24-4

Keywords:

copper nanoparticles, polyvinyl alcohol, metal-polymer complex, oxidation, 1-propanol, oxygen, heterogeneous catalysis, silica

Abstract

The aqueous solution of copper (II) complex of poly(vinyl alcohol) (PVA-Cu(II)) was characterized by conductimetric titration, UV-Vis spectroscopy and FTIR. The molar composition of the PVA-Cu(II) complex was determined to be equimolar. Subsequently, the PVA-Cu(II) complex was reduced by sodium borohydride to prepare copper nanoparticles (CuNPs) stabilized by PVA (PVA-CuNPs). According to DLS measurements in aqueous solution the average size of PVA-CuNPs was varied from 10 to 25 nm depending on the amount of sodium borohydride used for reduction. The optimal volume of sodium borohydride to obtain 96 % PVA-CuNPs with 10 nm size was found to be 3 mL of NaBH4 (0.5 mol×L–1). The PVA-CuNPs were then deposited onto SiO2 support to obtain SiO2/PVA-CuNPs nanocatalyst for the oxidation of 1-propanol. The SEM image and XRD spectrum of SiO2/PVA-CuNPs nanocatalyst showed the deposition of PVA-CuNPs on the surface of SiO2. The resulting SiO2/PVA-CuNPs nanocatalyst was used for the oxidation of 1-propanol to propionaldehyde by molecular oxygen in a batch-type catalytic reactor at 20oС and atmospheric pressure. The optimum catalyst mass and reaction time were found for the conversion of 1-propanol to propionaldehyde with yields ranging from 61.4 % to 87.8 %. Criteria of hydrodynamic similarity (Re, Pr’, Sh), overall volumetric mass transfer coefficient (), and economic metric (STY) were evaluated. 1-Propanol reacted with the decomposed atomically adsorbed oxygen atoms on the Cu(111), (220) surfaces to form propionaldehyde and water.

Three-phase system O2–1-propanol–CuNPs

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Published

2024-08-19

How to Cite

Maksotova, K. S., Akbayeva, D. N., Bakirova , B. S., Serikkyzy, A., Lesbek, B. M., Tatykhanova, G. S., & Kudaibergenov , S. E. (2024). Preparation and Characterization of Copper Nanoparticles Stabilized by Poly(vinyl alcohol) for Catalytic Oxidation of 1-Propanol. EURASIAN JOURNAL OF CHEMISTRY, 29(3 (115), 119–129. https://doi.org/10.31489/2959-0663/3-24-4

Issue

Vol. 29 No. 3 (115) (2024): Eurasian Journal of Chemistry

Section

NANO- AND PHOTO- CATALYSIS IN CURRENT CHEMISTRY: POSSIBILITIES AND CHALLENGES

License

Copyright (c) 2024 Kuralay Maksotova, Dina N. Akbayeva, Botagoz Bakirova, Akerke Serikkyzy, Bexultan Lesbek, Gulnur Tatykhanova, Sarkyt Kudaibergenov

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (CC BY-NC-ND 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.