Influence of silver nitrate concentration on the properties of silver nanoparticles

Sobczak-Kupiec, Agnieszka; Malina, Dagmara; Wzorek, Zbigniew; Zimowska, Małgorzata

doi:10.1049/mnl.2011.0152

Cited by 90 publications

(50 citation statements)

References 22 publications

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“…3 ] on the other hand, there were substantial amount of smaller AgNPs which is indicative of a faster nucleation of the AgNPs. Small AgNPs with a high specific surface area could be formed in a short formed which is in good agreement with literature [48]. …”

Section: Effect Of Concentration Of Agno 3 On Formation Of Agnpssupporting

confidence: 91%

“…This may be due to the fact that with increasing W o , the sizes of water droplets increases in which more reactant species (Ag + and BH 4 -) are solubilized into the water core compared to the microemulsions with lower water content. Thus, the AgNPs with smaller sizes may be observed due to faster nucleation and faster reduction [48] for W o = 15.0. It is well-known that microemulsions can change the rates, pathway of chemical reactions etc.…”

Section: Stability and Aggregation Of Agnps In W/o Microemulsions Of mentioning

confidence: 99%

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Stability and Aggregation Kinetics of Silver Nanoparticles in Water in Oil Microemulsions of Cetyltrimethylammonium Bromide and Triton X-100

Begum¹,

Jahan²,

Mollah³

et al. 2017

J. Sci. Res.

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Water in oil (W/O) microemulsions are simple preparative route for nanoparticles where water droplets dispersed in oil stabilized by surfactant or surfactant and cosurfactant monolayer act as nanoreactors to carry out chemical reactions. In this work, silver nanoparticles (AgNPs) were prepared in W/O microemulsions of cetyltrimethylammonium bromide (CTAB) and triton X-100 (TX-100) by using AgNO 3 and NaBH 4 as a precursor salt and reducing agent, respectively. To prepare microemulsions, CTAB or TX-100, 1-pentanol, cyclohexane and water were mixed with different molar ratio. AgNPs were prepared with different [AgNO 3 ] in microemulsions of CTAB with fixed water to surfactant ratio (W o ). Average particle sizes were determined from dynamic light scattering (DLS) measurements. AgNPs prepared from microemulsions of CTAB were unstable while from TX-100, NPs were stable. Aggregation kinetics was investigated by measuring the absorbance at definite time intervals at the absorption maximum, λ max of AgNPs in different media under pseudo-first-order conditions. The aggregation behavior was studied at different [AgNO 3 ]: [NaBH 4 ] and W o and the parameters were optimized to ensure formation of stable AgNPs without aggregation in microemulsions. This would help tuning the size, stability, and aggregation kinetics of AgNPs by controlling the nature of the surfactant and composition of the microemulsions.

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Section: Effect Of Concentration Of Agno 3 On Formation Of Agnpssupporting

confidence: 91%

Section: Stability and Aggregation Of Agnps In W/o Microemulsions Of mentioning

confidence: 99%

Stability and Aggregation Kinetics of Silver Nanoparticles in Water in Oil Microemulsions of Cetyltrimethylammonium Bromide and Triton X-100

Begum¹,

Jahan²,

Mollah³

et al. 2017

J. Sci. Res.

View full text Add to dashboard Cite

show abstract

“…In comparison with larger particles, these exhibit new/ improved properties (e.g. higher surface to volume ratio, changes in total energy, changes in conductivity, different optical features) 1 . To prepare silver nanoparticles with specific size and size distribution has thus become an essential research area in recent years.Many methods have been exploited for the synthesis of silver nanoparticles in the past few years; where-in chemical reaction in micro emulsion is one of the most important methods for synthesis of monodisperse nanoparticles 2 …”

Section: Introductionmentioning

confidence: 99%

Synthesis of Sorbitan Ester Stabilized Uniform Spherical Silver Nanoparticles

Shukla¹,

Nandi²,

Palsingh³

2016

Orient. J. Chem

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Controllable synthesis of uniform spherical silver nanoparticles was investigated by carrying out a chemical reduction reaction in a micro emulsion, formed under high shear mixing of aqueous silver nitrate solution and 2-ethyl hexanol as organic phase. Sodium borohydride was used as reducing agent and sorbitan monooleate (span-80) as stabilizer. Further, a study has been performed to observe the effect of silver nitrate concentration, reducing agent concentration, amount of surfactant and organic phase on the size and shape of silver nanoparticles. Transmission electron microscopy (TEM) and dynamic light scattering (DLS) techniques were used for elucidating the shape, size and size distribution of the synthesized silver nanoparticles. Crystal structure of silver nanoparticles thus prepared has been studied by X-ray diffraction analysis (XRD). Uniform silver nanoparticles of average diameter 15-20 nm with high purity and well crystalline nature were obtained under optimized set of conditions. The results of synthesis of these nanoparticles in present study were excellent and may also be used at larger scale.

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“…During the synthesis of AgNPs in our work, as all other synthesis parameters are kept fixed except molar ratio of reducing agent to metal salt, it can affect morphology of the synthesized AgNPs over HNTs surface. Lower amount of AgNPs is easily achievable by adding lower amount of metal salts, whereas an increasing amount of metal salts leads to the formation of aggregation (Sobczak-Kupiec et al 2011;Zeng et al 2013). Here in our work, the ability of PDA to reduce salt into AgNPs is feasible up to 5 mM concentration of AgNO 3 and beyond this formation of aggregation takes place which reduces the rate constant to some extent.…”

Section: -Nitrophenol (4-np) Reduction Studiesmentioning

confidence: 62%

Mussel inspired green synthesis of silver nanoparticles-decorated halloysite nanotube using dopamine: characterization and evaluation of its catalytic activity

et al. 2018

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Naturally occurring ceramic tubular clay, Halloysite nanotubes (HNTs), having a significant amount of surface hydroxyls has been coated by self-polymerized dopamine in this work. The polydopamine-coated HNTs acts as a self-reducing agent for Ag + ion to Ag 0 in nanometer abundance. Herein, nano size Ag 0 deposited on solid support catalyst has been used to mitigate water pollution within 10 min. To establish the versatility of the catalyst, nitroaryl (4-nitrophenol) and synthetic dye (methylene blue) have been chosen as model pollutant. The degradation/reduction of the aforementioned pollutants was confirmed after taking UV-visible spectra of the respective compounds. All the study can make sure that the catalyst is green and the rate constant value for catalytic reduction of 4-nitrophenol and methylene blue was calculated to be 4.45 × 10 −3 and 1.13 × 10 −3 s −1 , respectively, which is found to be more efficient in comparison to other nanostructure and commercial Pt/C nanocatalyst (1.00 × 10 −3 s −1 ).

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Influence of silver nitrate concentration on the properties of silver nanoparticles

Cited by 90 publications

References 22 publications

Stability and Aggregation Kinetics of Silver Nanoparticles in Water in Oil Microemulsions of Cetyltrimethylammonium Bromide and Triton X-100

Stability and Aggregation Kinetics of Silver Nanoparticles in Water in Oil Microemulsions of Cetyltrimethylammonium Bromide and Triton X-100

Synthesis of Sorbitan Ester Stabilized Uniform Spherical Silver Nanoparticles

Mussel inspired green synthesis of silver nanoparticles-decorated halloysite nanotube using dopamine: characterization and evaluation of its catalytic activity

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