Nanoparticles of Ag, Au, Pd, and Cu produced by alcohol reduction of the salts

Saravanakumar, A.; Gopalan, R.; Subbanna, G. N.; Rao, C. N. R.

doi:10.1557/jmr.1997.0057

Cited by 216 publications

(111 citation statements)

References 9 publications

Supporting

Mentioning

106

Contrasting

Order By: Relevance

“…Absorbance was taken in UV-spectrometer in different time intervals with both the isolates in the particular wavelengths where they have shown higher activity in silver nanoparticles and ZnO nanoparticles production. Both the graphs showed an increase in absorbance in various time intervals (0, 6,12,18,24,30,36,42, and 48 hrs) (Figs. 7 and 8).…”

Section: Uv-spectrometer Analysis Of Silver and Zno Nanoparticlesmentioning

confidence: 95%

“…Recent studies have shown that nanoparticle from some materials such as metal oxides are capable of inducing eukaryotic cell death and in prokaryotic, cell growth is inhibited by its cytotoxic effect [5]. Nanoparticles can be synthesized by different methods involving physical methods, chemical methods, and biological methods [6]. In recent years, the demand to develop eco-friendly procedures with low cost and non-toxic methods for nanoparticle synthesis is increased [7,8].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Green Synthesis and Characterization of Marine Yeast-Mediated Silver and Zinc Oxide Nanoparticles and Assessment of Their Antioxidant Activity

Aswathy

Gabylis

et al. 2017

Asian J Pharm Clin Res

View full text Add to dashboard Cite

Objective: The present study focuses on the synthesis of silver and zinc oxide (ZnO) nanoparticles from marine yeasts, isolated from the sediments of the Bay of Bengal, Bakkhali coast, West Bengal, and India. Methods:The marine sediment samples were diluted through serial diution and cultured onto yeast malt agar medium by the spread plate method. The selected yeast isolates were screened for the biosynthesis of silver and ZnO nanoparticles. Characterization of both the nanoparticles was done by applying ultraviolet (UV)-visible spectroscopy, atomic force microscopy, scanning electron microscopy, and Fourier transform infrared spectroscopy.Results: A total of five marine yeasts isolates were able to synthesize silver and ZnO nanoparticles as evidence of the color change. Optical density was measured in UV-spectrometer at different time interval for the conformation of production of nanoparticles. The size of silver nanoparticle was 31.78 nm and ZnO nanoparticle was 86.27 nm. The synthesized nanoparticles are then used for antioxidant assays. Conclusions:We are concluding that marine yeast isolates SAG1 and SAG2 both are potential marine yeast isolates which can synthesize both the silver and ZnO nanoparticles. They also showed good antioxidant activity.

show abstract

Section: Uv-spectrometer Analysis Of Silver and Zno Nanoparticlesmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Green Synthesis and Characterization of Marine Yeast-Mediated Silver and Zinc Oxide Nanoparticles and Assessment of Their Antioxidant Activity

Aswathy

Gabylis

et al. 2017

Asian J Pharm Clin Res

View full text Add to dashboard Cite

show abstract

“…The NCC may participate in the reduction reaction by the electron transfer from OH À to high valence state metal species (Sawyer and Roberts, 1988;Shin et al, 1987;Ayyappan et al, 1997). However, the reduction ability of SCM could be weakened in the presence of oxidizing species such as high valence state Fe in the reaction system (Fe in PCBs can be oxidized to their high valence state in dilute nitric acid pretreatment).…”

Section: Effect Of Ferric Irons Contained In the Second Leach Liquor mentioning

confidence: 99%

“…The ferric iron can weaken the reduction ability of SCM system, leading to that the reducing power of SCM is not enough to reduce all of cupric ions to zero-valent copper, so some cuprous oxides were formed. The possible reaction is as follows: In SCM system, the NCC (OH À ) can act as a reductant by the electron transfer from OH À to metal ions (Sawyer and Roberts, 1988;Shin et al, 1987;Ayyappan et al, 1997). According to the reaction Eqs.…”

Section: Effect Of Ferric Irons Contained In the Second Leach Liquor mentioning

confidence: 99%

A novel recovery method of copper from waste printed circuit boards by supercritical methanol process: Preparation of ultrafine copper materials

Xiu

Weng

et al. 2017

Waste Management

View full text Add to dashboard Cite

a b s t r a c tIn this study, supercritical methanol (SCM) process was successfully used for the preparation of ultrafine copper materials from waste printed circuit boards (PCBs) after nitric acid pretreatment. Waste PCBs were pretreated twice in nitric acid. Sn and Pb were recovered by the first nitric acid pretreatment. The leach liquor with a high concentration of copper ions after the second nitric acid leaching was subjected to SCM process. The mixture of Cu and Cu 2 O with poor uniformity of particle size was formed due to the effect of ferric iron contained in the leach liquor of waste PCBs, while more uniform and spherical Cu particles with high monodispersity and smaller size could be prepared after the removal of Fe. The size of Cu particles increased obviously with the decline of SCM temperature, and particles became highly aggregated when the reaction temperature decreased to 300°C. The size of Cu particles decreased markedly with the decrease of initial concentration of copper ion in the leach liquor of waste PCBs. It is believed that the process developed in this study is simple and practical for the preparation of ultrafine copper materials from waste PCBs with the aim of recycling these waste resources as a high value-added product.

show abstract

“…2,3 Other simple methods involve reducing metallic salts by the solvent used to prepare colloidal dispersions. [4][5][6][7][8][9] Hydrogen reduction techniques represent some of the simplest ways to obtain colloidal dispersions because they require a minimum number of components, thus avoiding the need for an undesirable excess of the reducing agent and the formation of reaction byproducts. 10 However, hydrazine reduction method offers the advantages of being able to produce the essentially also clean silver particles, which contains no inorganic ions except amine, carbon dioxide and nitrogen, even at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Silver Nanocolloids Using Silver Alkylcarbamate Complex in Organic Medium with PVP Stabilizer

Park¹,

Park²,

Gong³

2010

Bulletin of the Korean Chemical Society

View full text Add to dashboard Cite

We present a method for chemically reducing silver alkylcarbamate complex with hydrazine to synthesize silver nanocolloids in an organic solvent using polyvinylpyrrolidone (PVP) as the stabilizer. To determine the optimal conditions for preparing stable silver colloids of controlled size and shape, the silver 2-ethylhexylcarbamate (Ag-EHCB) complex, PVP, hydrazine, and 2-propanol solvent concentrations in the reaction mixture were varied. The initial colloid has a mean particle diameter of 5-80 nm, and it exhibits an absorption band with various shapes in the UV region with a maximum near 420 nm. UV-vis spectroscopy, TEM, and X-ray diffraction techniques were used to investigate the formation and growth process of the metallic silver nanocolloids.

show abstract

Nanoparticles of Ag, Au, Pd, and Cu produced by alcohol reduction of the salts

Cited by 216 publications

References 9 publications

Green Synthesis and Characterization of Marine Yeast-Mediated Silver and Zinc Oxide Nanoparticles and Assessment of Their Antioxidant Activity

Green Synthesis and Characterization of Marine Yeast-Mediated Silver and Zinc Oxide Nanoparticles and Assessment of Their Antioxidant Activity

A novel recovery method of copper from waste printed circuit boards by supercritical methanol process: Preparation of ultrafine copper materials

Preparation of Silver Nanocolloids Using Silver Alkylcarbamate Complex in Organic Medium with PVP Stabilizer

Contact Info

Product

Resources

About