Abstract
Cuprous oxide (Cu2O) nanoparticles in zeolite A were synthesized by two steps: (i) ion-exchange of copper ions into the zeolite and (ii) reduction of copper ions in cages of the zeolite by hydrazine hydrate in base medium. The Cu2O nanoparticles/zeolite product was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and energy-dispersive X-ray spectroscopy (EDX). The particle size of Cu2O nanoparticles was of 40 nm. The antibacterial activity of the as-synthesized Cu2O nanoparticles/zeolite against Escherichia coli was also investigated. Cu2O NPs/zeolite product can be favorably produced on large scale for water treatment and agricultural application as antimicrobial agent.
Highlights
Metal nanoparticles (NPs) have attracted considerable attention because of their unique properties such as catalytic, magnetic, optical, biological, and electrical properties
Cu oxide NPs, namely, cupric oxide (CuO) and cuprous oxide (Cu2O), are among the most widely used as antimicrobial agents for their high efficacy towards a broad spectrum of microorganisms [2,3,4]
Cu2O NPs in zeolite A were synthesized using hydrazine hydrate as a reducing agent
Summary
Metal nanoparticles (NPs) have attracted considerable attention because of their unique properties such as catalytic, magnetic, optical, biological, and electrical properties. According to Wick and Tilley [8], Cu2O is a promising material with the capacity for low cost, large-scale solar energy conversion due to the abundant nature of copper and oxygen, suitable bandgap of visible light, and effective, low energy intensity fabrication process. The inhibition effect of the 500 mg/kg CuO NPs on pepper root rot pathogen was significantly lower than that of the 75% chlorothalonil but higher than that of the 50% carbendazim. According to Ren et al [9], both octahedral and cubic Cu2O crystals could inhibit the growth of E. coli efficiently, and their bactericidal activities become stronger with increased Cu2O concentration. Cu2O NPs were synthesized within the zeolite A framework using CuSO4 as copper precursor and hydrazine hydrate (N2H4⋅H2O) as reducing agent. The antibacterial activity of the obtained Cu2O NPs/zeolite against Escherichia coli (E. coli) was investigated
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