Abstract
Truncated octahedral cuprous oxide (Cu2O) crystallites with highly uniform morphologies and sizes ranging from 2.4–2.5 µm were prepared by using a green and convenient approach and their antibacterial activities were studied. They were obtained through the chemical reduction of copper chloride by glucose in the presence of sodium hydroxide and polyethylene glycol at room temperature for 2 h. X-ray powder diffraction, energy dispersive spectrometer, scanning electron microscopy, and transmission electron microscopy as well as high-resolution transmission electron microscopy (HRTEM) were used to characterise the obtained products. Structural analysis revealed that these truncated octahedral crystallites were composed of eight {111} faces and six {200} faces. The effects of time, temperature and polyethylene glycol on the formation of truncated octahedral cuprous oxide were investigated. The possible growth process and mechanism of truncated octahedral cuprous oxide were proposed. The antibacterial activities of truncated octahedral Cu2O were also explored. They exhibited significant antimicrobial activity against both gram-negative and gram-positive bacteria. The result of antibacterial study revealed that the prepared Cu2O can be a promising candidate for wide range of bio-medical applications.
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