A comparative study of pure and copper (Cu)-doped ZnO nanorods for antibacterial and photocatalytic applications with their mechanism of action

Abstract

The present study reports the synthesis of pure and Cu-doped ZnO nanorods for antibacterial and photocatalytic applications. The samples were synthesized by simple, low cost mechanical-assisted thermal decomposition process. The synthesized materials were characterized by scanning electron microscopy, UV-Visible spectroscopy, and photoluminescence studies. The antibacterial activity of characterized samples was determined against Gram-positive bacteria such as Staphylococcus aureus and Streptococcus pyogenes and Gram-negative bacteria such as Escherichia coli using shake flask method with respect to time. The significant antibacterial activity was perceived from scanning electron micrographs that clearly revealed bacterial cell lysis resulting in the release of cytoplasmic content followed by cell death. The degradation of methylene blue was used as a model organic dye for photocatalytic activity. The present study demonstrates the superior photocatalytic and antibacterial activity of Cu-doped ZnO nanorods with respect to pure ZnO nanorods.

The comparison of antibacterial activities of CsPbBr3 and ZnO nanoparticles

“…Absorption bands at 376 and 510 nm could be seen for ZnO and CsPbBr 3 perovskite NPs, respectively. Compared to ZnO NPs, the higher red shift in the adsorption band of CsPbBr 3 perovskite NPs indicated that a higher percentage of solar light can be used for electron-hole pair generation [15] which is substantial in antibacterial activity. Moreover, the optical band gaps of ZnO and CsPbBr 3 perovskite NPs were calculated using Tauc's equation, by plotting (αhυ) 2 versus hυ [16], as depicted in Fig.…”

Impact of ZnO Nano Materials on Medicinal Black Rice Seed Germination

“…On boiling in water, the dark blackish red anthocynanins pigment oozed out as supernatant [ Figure 5]. to obtain four ZnO nanopowders with different aspect ratios [16] [17]. The obtained powders were then washed twice with distilled water, followed by drying in an oven at 80˚C for 8 hours.…”

Preparation of PANI–CuZnO ternary nanocomposite and investigation of its effects on polyurethane coatings antibacterial, antistatic, and mechanical properties

“…Antibacterial mechanism of action of copper could be originated from creating active oxygen species and disrupting bacterial cells' membrane processes [9,10]. Modification of ZnO nanoparticles by Cu ions can improve the antibacterial property of resultant nanohybrids [11]. Moreover, the presence of ZnO nanoparticles in polymer coatings matrix could noticeably increase the produced coatings mechanical properties [12,13].…”