SYNTHESIS OF COPPER OXIDE NANO PARTICLES BY USING Phormidium cyanobacterium

Rahman, Abdul; Ismail, Alice Sabrina; Jumbianti, Desi; Magdalena, Stella; Sudrajat, Hanggara

doi:10.22146/ijc.21498

Cited by 84 publications

(33 citation statements)

References 2 publications

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“…As sodium borohydride (NaBH 4 ) concentration increased cuprous oxides formation was favored. These results suggested the formation of Cu 2 O and CuO in colloidal solution, which was in agreement with results previously reported [43,[62][63][64]. One explanation for these results is the high activity of copper NPs which are obtained during the synthesis.…”

Section: Effect Of Sodium Borohydride Nabhsupporting

confidence: 92%

Effect of the Concentration of NaBH4 and N2H4 as Reductant Agent on the Synthesis of Copper Oxide Nanoparticles and its Potential Antimicrobial Applications

Guzmán¹,

Arcos²,

Dille³

et al. 2018

Nano BioMed ENG

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The antibacterial activity of various nanoparticles is gaining increasing interest due to its potential medical applications. In this work, we presented the synthesis of copper oxide nanoparticles prepared by chemical reduction from aqueous solutions of copper sulfate (CuSO 4) with sodium borohydride (NaBH 4) and hydrazine hydrate (N 2 H 4) as reductant and polyvinylpyrrolidone (PVP) as stabilizer. The X-ray diffraction spectra showed the formation of tenorite (CuO) and cuprite (Cu 2 O) nanoparticles when different ratios of CuSO 4 /NaBH 4 and CuSO 4 /N 2 H 4 were used. Photographs obtained by transmission electron microscopy (TEM) showed agglomerates of grains with a narrow size distribution (from 20 to 70 nm), whereas the radii of the individual particles were between 2 and 20 nm. Smaller nanoparticles and narrower particle size distributions were obtained when NaBH 4 was used. The results of antibacterial activity using the Kirby-Bauer method showed that nanoparticles obtained with NaBH 4 presented a reasonable bactericidal activity. Pseudomonas aureginosa and Staphylococcus aureus were more susceptible to the particle size than Escherichia coli. In addition, with small amounts of Cu 2 O in samples of CuO nanoparticles, the antibacterial susceptibility against Pseudomonas aureginosa was improved. Finally, nanoparticles of CuO incorporated into cotton by applying ultrasound waves remained impregnated after five washes.

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Section: Effect Of Sodium Borohydride Nabhsupporting

confidence: 92%

Effect of the Concentration of NaBH4 and N2H4 as Reductant Agent on the Synthesis of Copper Oxide Nanoparticles and its Potential Antimicrobial Applications

Guzmán¹,

Arcos²,

Dille³

et al. 2018

Nano BioMed ENG

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“…This study sought the biogenic synthesis of CuO-NPs by P. mirabilis strain 10B which was clearly apparent visually by the variations in the color of bacterial biomass and the ambient aqueous solution from pale green to brown or faint black as indicated in Figure 1(a). In a parallel control experiment, no distinctly remarkable changes were noticed, suggesting the onset of biotransformation via reduction of metal ions to an oxide form of Cu-NPs by reducing agent (bacteria) in the growth medium [24]. It is noteworthy that such changing in the reaction solution color arises from excitation of surface plasmon resonance (SPR) or interband transitions in the metal NPs, which are a characteristic feature for any particles with a metallic nature.…”

Section: Biosynthesis and Characterization Of Npsmentioning

confidence: 99%

“…(1) Intracellular CuO-NPs. Usually, TEM technique was employed to provide an insight on the shape, size, and Journal of Nanomaterials location of NP synthesis and also protein-coating NPs [24]. Figures 6 and 7 depicted the representative TEM micrographs of CuO-NPs and their bionanofactory during the stationary growth phase.…”

Section: Microstructure Analysis (Tem)mentioning

confidence: 99%

Concurrent Synthesis of Zero- and One-Dimensional, Spherical, Rod-, Needle-, and Wire-Shaped CuO Nanoparticles byProteus mirabilis10B

Eltarahony

Zaki

Abd‐El‐Haleem

2018

Journal of Nanomaterials

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Natural environment is a wealthy source of bionanofactories that invested in green approaches as the fabrication of biomimetic nanomaterials. The current study points out the importance of microbial activity in metal bioremediation, green synthesis of NPs, and global biogeochemical cycles of bioactive metals as well. It describes for the first time the synchronous biosynthesis of zero-(intracellular) and one-dimensional (extracellular) copper oxide nanoparticles (CuO-NPs) via Proteus mirabilis 10B. This bionanofactory represents key location of reduction and stabilization, and its exopolysaccharide additionally provides nucleation and growth site for CuO-NPs. The as-synthesized CuO-NPs were characterized; UV-Vis spectroscopy revealed surface plasmon resonance at 275 and 430 nm for intracellular and extracellular CuO-NPs, respectively. XRD reflected crystalline, pure phase monoclinic structure CuO-NPs. EDX illustrated strong copper signal with atomic percentages 32.3% (intracellular) and 14% (extracellular) CuO-NPs. However, ζ-potential recorded −62.5 and −43.8 mV with PDI 0.207 and 0.313 for intracellular and extracellular CuO-NPs, respectively, confirming the colloidal stability and monodispersity. Moreover, TEM micrographs depicted quasi-spherical intracellularly sequestered CuO-NPs (10 nm). Unexpectedly, extracellular CuO-NPs exhibited rod-, needle-, and wire-shaped with 17-37.5 nm in width and 112-615 nm in length. The antagonistic activity of both types of CuO-NPs was evaluated against Gram-negative and Gram-positive bacteria (aerobic and anaerobic), biofilm, yeast, mold, and algae. The potent antagonistic efficacy of CuO-NPs was displayed which encourages its utilization in controlling microbial contamination. Finally, the promising metabolic activity of Proteus mirabilis 10B can be exploited in simultaneous and beneficial applications for human and the surrounding ecosystem.

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“…A recent study revealed that nano-scale materials exhibit unique electronic and optical properties, which are unlike those in their bulk state [1]. Metallic nanoparticles have attracted attention of many researchers, because of the local field enhancement at nano interfaces, which is beneficial for a number of applications, from sensors to nonlinear optics [2].…”

Section: Introductionmentioning

confidence: 99%

Morphological and Optical Characteristics of Chitosan(1−x):Cuox (4 ≤ x ≤ 12) Based Polymer Nano-Composites: Optical Dielectric Loss as an Alternative Method for Tauc’s Model

Aziz

2017

Nanomaterials

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In this work, copper (Cu) nanoparticles with observable surface plasmonic resonance (SPR) peaks were synthesized by an in-situ method. Chitosan host polymer was used as a reduction medium and a capping agent for the Cu nanoparticles. The surface morphology of the samples was investigated through the use of scanning electron micrograph (SEM) technique. Copper nanoparticles appeared as chains and white specks in the SEM images. The strong peaks due to the Cu element observed in the spectrum of energy dispersive analysis of X-rays. For the nanocomposite samples, obvious peaks due to the SPR phenomena were obtained in the Ultraviolet-visible (UV-vis) spectra. The effect of Cu nanoparticles on the host band gap was understood from absorption edges shifting of absorption edges to lower photon energy. The optical dielectric loss parameter obtained from the measurable quantities was used as an alternative method to study the band structure of the samples. Quantum mechanical models drawbacks, in the study of band gap, were explained based on the optical dielectric loss. A clear dispersion region was able to be observed in refractive indices spectra of the composite samples. A linear relationship with a regression value of 0.99 was achieved between the refractive index and volume fractions of CuI content. Cu nanoparticles with various sizes and homogenous dispersions were also determined from transmission electron microscope (TEM) images.

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SYNTHESIS OF COPPER OXIDE NANO PARTICLES BY USING Phormidium cyanobacterium

Cited by 84 publications

References 2 publications

Effect of the Concentration of NaBH4 and N2H4 as Reductant Agent on the Synthesis of Copper Oxide Nanoparticles and its Potential Antimicrobial Applications

Effect of the Concentration of NaBH4 and N2H4 as Reductant Agent on the Synthesis of Copper Oxide Nanoparticles and its Potential Antimicrobial Applications

Concurrent Synthesis of Zero- and One-Dimensional, Spherical, Rod-, Needle-, and Wire-Shaped CuO Nanoparticles byProteus mirabilis10B

Morphological and Optical Characteristics of Chitosan(1−x):Cuox (4 ≤ x ≤ 12) Based Polymer Nano-Composites: Optical Dielectric Loss as an Alternative Method for Tauc’s Model

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