Synthesis, Characterization, and Antibacterial Activity of Copper(II) Oxide Nanoparticles Prepared by Thermal Decomposit
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ynthesis, Characterization, and Antibacterial Activity of Copper(II) Oxide Nanoparticles Prepared by Thermal Decomposition Aliakbar Dehno Khalajia, *, Mahbobeh Soleymanifarda, Marketa Jarosovab, and Pavel Machekb aDepartment bInstitute
of Chemistry, Faculty of Science, Golestan University, Gorgan, 26465 Iran of Physic of the Czech Academy of Sciences, Prague, 182 21 Czech Republic *e-mail: [email protected]
Received December 15, 2019; revised January 22, 2020; accepted January 23, 2020
Abstract—In the present work, copper(II) oxide nanoparticles were prepared using simple and low-cost from calcination of CuSO4 or Cu(OAC)2 at the presence of polyvinyl alcohol (PVA) in a weight ratio of 1 : 1 at 600°C for 3 h. The basic properties of CuO nanoparticles were described by Fourier Transform Infrared (FT-IR) spectroscopy, powder X-ray diffraction (XRD) and transmission electron microscopy (TEM). All results confirmed that the as-prepared copper(II) oxide nanoparticles were pure with high degree of crystallinity and that resulting shape, size and morphology of nanoparticles were depending on the applied precursor. In addition, the antibacterial activity of CuO-1 and CuO-2 nanoparticles was performed on Gram-negative E. coli and P. aeruginosa using disc diffusion method cultures throughout at 24 h period. Antibacterial results demonstrated that the as-prepared CuO nanoparticles act as effective bacterial agents. Keywords: copper(II) oxide, nanoparticles, low-cost, calcination, antibacterial, Gram-negative DOI: 10.1134/S1027451020050109
1. INTRODUCTION Transition metal oxides (TMO) nanoparticles receive considerable attention due to their extensive possibilities in technological applications. There are numerous types of TMO nanoparticles investigated such as Mn3O4 [1], Co3O4 [2], NiO [3], ZnO [4], but some of them are more favorable due to their unique properties. Among them, Copper(II) oxide as a p-type semiconductor with narrow band gap (1.2–1.7 eV) has attracted considerable attention in recent years [5–8]. CuO possess unique catalytic, optical and electrical properties and is used in plentiful applications [5–11]. Also, there is a lot of papers on the antibacterial activity of CuO nanoparticles [9, 10], because of them have demonstrated an enhanced activity. For example, Tavakoli et al. [11] reported the morphology dependent antibacterial activity of copper oxide nanoparticles. Sharmila et al., [9] considered antibacterial activity of copper oxide prepared via biogenic synthesis using Bauhinia tomentosa leaves extract. Moreover, its production of CuO nanoparticles is low-cost and nontoxic. Literature reviews about preparation of CuO nanoparticles show that their shape, size and morphology depend on the preparation condition [5–11]. Therefore, a lot of techniques have been developed to prepare CuO nanoparticles, such as sonochemical synthesis [5], sol-gel method [7], electrochemical discharge process [8], biogenic synthesis [9], reverse
micelles [12], precipitation method [13], and solution method [14]. The synthes
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