Synthesis Of Nickel Nanoparticles: Microscopic Investigation, An Efficient Catalyst And Effective Antibacterial Activity

Chaudhary, Ratiram Gomaji; Tanna, Jay A.; Gandhare, Nilesh V.; Alok, R.; Juneja, Harjeet D.

doi:10.5185/amlett.2015.5901

Cited by 82 publications

(42 citation statements)

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“…Actually, the higher antagonistic activity of intracellular CuO-NPs over extracellular CuO-NPs and their precursor salt attributed to the larger surface area (surface/volume ratio) associated with ultrafine size and monodispersity with no agglomeration which subsequently leads to a faster dissolution rate (elution/releasing) of copper ions. Therefore, that allowed more tightly adherence with microbial cells and eventually cytotoxicity stimulation [76]. Obviously, CuO-NPs have a nonspecific mode of action in exhibiting antimicrobial effect, but several mechanisms could be conjugated concurrently, including physical disruption of cell wall/ membrane, integral component leakage, reacting with thiol groups of proteins, disorder of the DNA helical structure, and elevating oxidative stress by generating reactive oxygen species (ROS) [67,72].…”

Section: Inhibitory Effect Of Biosynthesized Cuo-nps On Biofilmmentioning

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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Section: Inhibitory Effect Of Biosynthesized Cuo-nps On Biofilmmentioning

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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“…Nanoparticles possess unique optical, magnetic, electrical and chemical properties due to their high surface area to volume ratio, which makes them highly attractive for both the scientific and industrial community [1,2]. There is a specific interest in nickel (Ni) and nickel oxide (NiO) nanoparticles because of their electronic, magnetic and catalytic properties, as well as economic advantages in catalytic applications compared to noble metals [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Simple Preparation of Ni and NiO Nanoparticles Using Raffinate Solution Originated from Spent NiMH Battery Recycling

Ebin

2018

J Inorg Organomet Polym

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Nickel (Ni) and nickel oxide (NiO) nanoparticles were produced by a combination of precipitation and reduction/calcination methods using the raffinate solution originated from laboratory scale spent NiMH recovery process. Ni recovery from the solution reached 99.8% by a simple precipitation step using baking soda. X-ray diffraction, FTIR spectroscopy, carbon analyzer and thermal gravimetric analysis techniques were used to characterize the precipitate. Metallic and oxide nanoparticles were obtained by hydrogen reduction and calcination under air atmosphere of the precipitate at 400 °C, respectively for 30-90 min residence times. The crystal structure, crystallite size, morphology, particle size and surface area of the samples, as well as carbon residue content in the particles were detected by particle characterization methods. The results indicate that spherical Ni nanoparticles have a crystallite size about 37 nm, and particle sizes of around 100 nm. The agglomeration of the nanoparticles reduces by increasing residence time. NiO nanoparticles have finer crystallite and particle sizes than the metallic samples produced at the same temperature and residence times. The results show that the combination of the simple methods presented can be an alternative process for producing advanced particles from spent NiMH batteries.

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“…The reactions are usually catalyzed by bases 5 such as aliphatic amines, ethylenediamine and piperidine or their corresponding ammonium salts, ammonia or sodium ethoxide in organic solvents. Lewis acids [6][7][8][9] , zeolites 10 , surfactants 11 , different types of nanoparticles 12,13 have also been employed to catalyze the reactions. Moreover, the uses of ionic liquids 14 , microwave 15,16 and ultrasound 17 are found in the recent literature to effect this condensation under ecofriendly conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Though a number of solvent-free methodologies are known for effecting Knoevenagel condensation 13,15,16,24 , only a few catalyst-free reaction conditions are reported 25,26 . Considering the importance of synthesis of new compounds containing an indole moiety and effecting Knoevenagel condensation under catalyst-and solvent-free conditions, we undertook the present work where 3-methylindole-2-carboxaldehyde (1) (readily available from a well-known indole compound skatole) 27 , with different active methylene compounds under the influence of heat only.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a Series of 2-Indolylmethylene-Linked Compounds by Thermal Knoevenagel Condensation Under Catalyst- And Solvent-Free Conditions

Halder

Sepay²,

Mallik³

2017

ECB

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Synthesis Of Nickel Nanoparticles: Microscopic Investigation, An Efficient Catalyst And Effective Antibacterial Activity

Cited by 82 publications

References 0 publications

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

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

Simple Preparation of Ni and NiO Nanoparticles Using Raffinate Solution Originated from Spent NiMH Battery Recycling

Synthesis of a Series of 2-Indolylmethylene-Linked Compounds by Thermal Knoevenagel Condensation Under Catalyst- And Solvent-Free Conditions

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