CuO and Ag/CuO nanoparticles: Biosynthesis and antibacterial properties

Ghasemi, Nasrin; Jamali‐Sheini, Farid; Zekavati, Roya

doi:10.1016/j.matlet.2017.02.111

Cited by 66 publications

(29 citation statements)

References 21 publications

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“…As known, the presence of NaBH 4 According to the observed profile, the reduction can occur in several steps, the reaction proceeds into three steps: the very fast reduction of 4-NPs to 4-nitrophenol and then to 4hydroxylaminophenol, which is reduced to the aminophenol in the final, slowest step.…”

Section: Proposed Mechanism For the Catalytic Properties Improvementsmentioning

confidence: 93%

“…Further, CuO@Ag 0 core-shell was synthesized by coating the prepared CuO as core with Ag as shell. In this regard, 0.2g of CuO was dispersed in 40 mL aqueous solution under 4 vigorous stirring for 30 min. Ag + solution was prepared by dissolving 0.02g of AgNO 3 as precursor and 0.001 g of PVP as stabilizing agent in distilled water, and was then mixed with the aqueous CuO suspension and 5 mL of NaBH 4 solution under vigorous stirring at 25°C for 2 hours.…”

Section: Chemicals and Materials Synthesismentioning

confidence: 99%

“…The control of water pollution has become one of the major challenges to be addressed worldwide. Among the wide variety of water pollutants, bacterial pathogens such as Escherichia coli and Staphylococcus aureus [2,3], 4-nitrophenol (4-NP) and its derivate [4] are particularly hazardous for biodiversity and humain health. 4-NP is recognized as being very toxic, but its chemical conversion into less harmful derivative such as 4-aminophenol (4-AP) could be beneficial for water treatments.…”

Section: Introductionmentioning

confidence: 99%

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Silver nanoparticle embedded copper oxide as an efficient core–shell for the catalytic reduction of 4-nitrophenol and antibacterial activity improvement

et al. 2018

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A facile and eco-friendly method was developed to prepare a microporous CuO@Ag0 core-shell with high catalytic and antibacterial activities. Scanning and transmission electron microscopy revealed a preponderance of nearly spherical 50 nm particles with slight structure compaction. Comparison of the hysteresis loops confirmed the structure compaction after AgNP incorporation, and a significant decrease of the specific surface area from 55.31 m2 g-1 for CuO to 8.03 m2 g-1 for CuO@Ag0 was noticed. A kinetic study of 4-nitrophenol (4-NP) reduction into 4-aminophenol (4-AP) with sodium borohydride revealed a first order reaction that produces total conversion in less than 18 minutes. CuO@Ag0 also exhibited appreciable antibacterial activity against Staphylococcus aureus. The antibacterial effects were found to strongly depend on the size, contact surface, morphology and chemical composition of the catalyst particles. The addition of Ag0-NPs produced more reactive oxygen species in the bacteria medium. These results open promising prospects for its potential applications as a low cost catalyst in wastewater treatment and antibacterial agent in cosmetics.

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Section: Proposed Mechanism For the Catalytic Properties Improvementsmentioning

confidence: 93%

Section: Chemicals and Materials Synthesismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Silver nanoparticle embedded copper oxide as an efficient core–shell for the catalytic reduction of 4-nitrophenol and antibacterial activity improvement

et al. 2018

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“…Nanomaterials have been utilized broadly in various fields such as tissue engineering, drug delivery, bioscience, agriculture and water due to its unique physical and chemical properties [1][2][3]. Recently, nanoparticles (NPs) demonstrated a high impact in the antibacterial filed [4,5]. Among them, zinc oxide (ZnO) is considered for its photocatalyticdriven bacterial activity in which it has a broad direct band gap energy of 3.3 eV and high exciton binding energy of 60 meV [6].…”

Section: Introductionmentioning

confidence: 99%

The comparison of antibacterial activities of CsPbBr3 and ZnO nanoparticles

et al. 2019

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All-inorganic cesium lead bromide (CsPbBr 3) perovskite nanoparticles and ZnO nanoparticles were synthesized. The structure, optical properties and the morphology of synthesized nanoparticles were fully characterized using X-ray diffraction (XRD), UV/Vis spectroscopy and transition electron microscopy (TEM). A comparative study was carried out to investigate the antibacterial activity of ZnO and CsPbBr 3 perovskite nanoparticles toward Gram-negative, rod-shaped Escherichia coli O157:H7 bacteria cells. Experimental results showed that the antibacterial activity of CsPbBr 3 nanoparticles was better than that of ZnO nanoparticles.

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“…The copper-based nanoparticles are preferred to gold or silver nanoparticles because of low cost; high surface area; good thermal, mechanical stability, antimicrobial activity, and UV-light barrier property; high-performance conductive material in various applications; and use in photovoltaic and photocatalytic fields owing to their narrow band gap (1.2 eV) [20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Comparative Antibacterial Effects of a Novel Copper and Silver- Based Core/Shell Nanostructure by Sonochemical Method

Karakuş¹,

Tan²,

İlgar³

et al. 2018

New Trends in Ion Exchange Studies

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In this study, the antibacterial effect of novel copper (Cu) and silver (Ag) metal-based coreshell nanostructures against Escherichia coli (E. coli-Gram negative) was investigated. The novel copper-and silver-based nanostructures were prepared separately by using nontoxic, biodegradable, and biocompatible biopolymers chitosan and guar gumpolyvinyl alcohol (GG-PVA), which were modified by inorganic phases SiO 2 and sepiolite. On the other hand, guar gum-PVA (GG-PVA) was modified by sepiolite, and this nanostructure was prepared only for silver. Besides, Cu was dispersed in a different biopolymer chitosan by sonochemical method in the presence and absence of SiO 2 .X-r a y photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and X-ray diffraction (XRD) techniques were used to characterize the surface chemistry and morphology of the core/shell nanostructure. Nanoscale zero-valent Cu (NZVCu) was found under thin CuO film according to the XPS results. SEM images showed that spherical Cu/CuO@SiO 2 nanostructures (100 nm) were homogenously dispersed in the chitosan by using sonochemical method. Antibacterial property of the core-shell nanostructures was analyzed by well-diffusion method against Escherichia coli (E. coli-Gram negative). Cu/CuO@SiO 2 nanostructures were found very effective against the E. coli due to high ratio of NZVCu in the nanostructure.

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CuO and Ag/CuO nanoparticles: Biosynthesis and antibacterial properties

Cited by 66 publications

References 21 publications

Silver nanoparticle embedded copper oxide as an efficient core–shell for the catalytic reduction of 4-nitrophenol and antibacterial activity improvement

Silver nanoparticle embedded copper oxide as an efficient core–shell for the catalytic reduction of 4-nitrophenol and antibacterial activity improvement

The comparison of antibacterial activities of CsPbBr3 and ZnO nanoparticles

Comparative Antibacterial Effects of a Novel Copper and Silver- Based Core/Shell Nanostructure by Sonochemical Method

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