Nanosized silver powder via reduction of silver nitrate by sodium formaldehydesulfoxylate in acidic pH medium

Khanna, Pawan K.; Subbarao, V.V.V.S.

doi:10.1016/s0167-577x(02)01203-x

Cited by 88 publications

(36 citation statements)

References 6 publications

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“…Generally, metal nanopowders are synthesized by the reduction of metal ions in aqueous or organic solution, by a chemical reagent or electrochemical current [5]. Many other methods have been devised to synthesize these powders, including a hydrothermal reduction method [6,7], microemulsion synthesis [8], chemical reduction at acidic pH [9], and electrochemical reduction with a rotating cathode [10]. Much focus has been on methods that allow control of the particle size as there is evidence that particle size directly affects the properties of the powder [11,12].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Nickel and Nickel Hydroxide Nanopowders by Simplified Chemical Reduction

Tientong

Garcia

Thurber

et al. 2014

Journal of Nanotechnology

116

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Nickel nanopowders were synthesized by a chemical reduction of nickel ions with hydrazine hydrate at pH ∼12.5. Sonication of the solutions created a temperature of 54-65 ∘ C to activate the reduction reaction of nickel nanoparticles. The solution pH affected the composition of the resulting nanoparticles. Nickel hydroxide nanoparticles were formed from an alkaline solution (pH∼10) of nickel-hydrazine complexed by dropwise titration. X-ray diffraction of the powder and the analysis of the resulting Williamson-Hall plots revealed that the particle size of the powders ranged from 12 to 14 nm. Addition of polyvinylpyrrolidone into the synthesis decreased the nickel nanoparticle size to approximately 7 nm. Dynamic light scattering and scanning electron microscopy confirmed that the particles were in the nanometer range. The structure of the synthesized nickel and nickel hydroxide nanoparticles was identified by X-ray diffraction and Fourier transform infrared spectroscopy.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Nickel and Nickel Hydroxide Nanopowders by Simplified Chemical Reduction

Tientong

Garcia

Thurber

et al. 2014

Journal of Nanotechnology

116

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show abstract

“…In addition to the bactericidal effects of Ag + ions, the antimicrobial activity of colloid AgNPs is influenced by the size of the particles, ie, the smaller the particles, the greater the antimicrobial effect. [22][23][24][25][26][27][28] Therefore, in developing methods for AgNP preparation, it is important to control the size of the AgNP particles. AgNPs of small size and devoid of aggregation properties are favorable for this purpose.…”

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confidence: 99%

Synthesis and characterization of silver/montmorillonite/chitosan bionanocomposites by chemical reduction method and their antibacterial activity

Shameli¹,

Ahmad²,

Zargar³

et al. 2011

IJN

138

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Silver nanoparticles (AgNPs) of a small size were successfully synthesized using the wet chemical reduction method into the lamellar space layer of montmorillonite/chitosan (MMT/Cts) as an organomodified mineral solid support in the absence of any heat treatment. AgNO3, MMT, Cts, and NaBH4 were used as the silver precursor, the solid support, the natural polymeric stabilizer, and the chemical reduction agent, respectively. MMT was suspended in aqueous AgNO3/Cts solution. The interlamellar space limits were changed (d-spacing = 1.24–1.54 nm); therefore, AgNPs formed on the interlayer and external surface of MMT/Cts with d-average = 6.28–9.84 nm diameter. Characterizations were done using different methods, ie, ultraviolet-visible spectroscopy, powder X-ray diffraction, transmission electron microscopy, scanning electron microscopy, energy dispersive X-ray fluorescence spectrometry, and Fourier transform infrared spectroscopy. Silver/montmorillonite/chitosan bionanocomposite (Ag/MMT/Cts BNC) systems were examined. The antibacterial activity of AgNPs in MMT/Cts was investigated against Gram-positive bacteria, ie, Staphylococcus aureus and methicillin-resistant S. aureus and Gram-negative bacteria, ie, Escherichia coli , E. coli O157:H7, and Pseudomonas aeruginosa by the disc diffusion method using Mueller Hinton agar at different sizes of AgNPs. All of the synthesized Ag/MMT/Cts BNCs were found to have high antibacterial activity. These results show that Ag/MMT/Cts BNCs can be useful in different biological research and biomedical applications, including surgical devices and drug delivery vehicles.

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“…The ability of silver to prevent biofilm formation has also been demonstrated (Stobie et al, 2008). The most common synthesis of silver nanoparticles is the chemical reduction of a silver salt solution by a reducing agent such as NaBH 4 , citrate, or ascorbate (Nickel et al, 2000;Leopold & Lendl, 2003;Khanna & Subbarao, 2003;Sondi et al, 2003).…”

Section: Inorganic Metal and Composite Particlesmentioning

confidence: 99%

Antimicrobial Biomimetics

María¹,

Barbassa²,

Melo³

2011

Biomimetic Based Applications

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Nanosized silver powder via reduction of silver nitrate by sodium formaldehydesulfoxylate in acidic pH medium

Cited by 88 publications

References 6 publications

Synthesis of Nickel and Nickel Hydroxide Nanopowders by Simplified Chemical Reduction

Synthesis of Nickel and Nickel Hydroxide Nanopowders by Simplified Chemical Reduction

Synthesis and characterization of silver/montmorillonite/chitosan bionanocomposites by chemical reduction method and their antibacterial activity

Antimicrobial Biomimetics

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