A kinetic study of silver nanoparticles formation from paracetamol and silver(I) in aqueous and micellar media

Ahmad, Naushad; Malik, Maqsood Ahmad; Al-Nowaiser, F. M.; Khan, Zaheer

doi:10.1016/j.colsurfb.2010.02.020

Cited by 26 publications

(28 citation statements)

References 31 publications

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“…The growing behavior of synthesizing metal nanoparticle could be defined by the optical absorbance varying with reaction time, that is, the stages of nucleation and growth were respectively could be observed from the dynamic optical absorption spectra. The UV-Vis light absorbance of sliver nanoparticle would increase with reaction time, but which is limited by a maximum wavelength of characteristics peak that begins to red shift [19]. The activation energy of synthesis reaction could be derived by Arrhenius equation [20].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of silver/titanium dioxide composite nanoparticles in ethylene glycol with alkaline solution through sonochemical process

Jhuang

Cheng

2016

Ultrasonics Sonochemistry

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This paper aims to study fabrication and characterization of silver/titanium oxide composite nanoparticle through sonochemical process in the presence of ethylene glycol with alkaline solution. By using ultrasonic irradiation of a mixture of silver nitrate, the dispersed TiO2 nanoparticle in ethylene glycol associated with aqueous solution of sodium oxide yields Ag/TiO2 composite nanoparticle with shell/core-type geometry. The powder X-ray diffraction (XRD) of the Ag/TiO2 composites showed additional diffraction peaks corresponding to the face-centered cubic (fcc) structure of silver crystallization phase, apart from the signals from the cores of TiO2. Transmission electron microscopy (TEM) images of Ag/TiO2 composites, which average particle size is roughly 80 nm, reveal that the titanium oxide coated by Ag nanoparticle with a grain size of about 2-5 nm. Additionally, the formation of silver nanoparticles on TiO2 was monitored by ultraviolet visible light spectrophotometer (UV-Vis). As measured the optical absorption spectra of as-synthesized Ag nanoparticle varying with time, the mechanism of surface formatting silver shell on the cores of TiO2 could be explored by autocatalytic reaction; the conversion of Ag particle from silver ion is 98% for the reaction time of 1000 s; and the activity energy of synthesizing Ag nanoparticles on TiO2 is 40 kJ/mol at temperature ranging from 5 to 25°C. Hopefully, this preliminary investigation could be used for mass production of composite nanoparticles assisted by ultrasonic chemistry in the future.

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Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of silver/titanium dioxide composite nanoparticles in ethylene glycol with alkaline solution through sonochemical process

Jhuang

Cheng

2016

Ultrasonics Sonochemistry

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“…The microbiological and physiological activities of paracetamol depend upon its redox behavior. The redox reactions of paracetamol with permanganate ions and silver ions have been explored by Khan et al [11,12]. Paracetamol behaves as a mild reducing agent and reduces silver ions to silver nano particles.…”

Section: Introductionmentioning

confidence: 99%

Micellar Effects upon the Alkaline Hydrolysis of Acetaminophen Prodrugs: Carboxylic and Carbonic Acid Esters

et al. 2014

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The rates of alkaline hydrolysis for four carboxylate esters (4-acetaminophenyl acetate, 4-acetaminophenyl butyrate, 4-acetaminophenyl heptanoate and 4-acetaminophenyl benzoate) and three carbonate ester (4-acetaminophenyl methylcarbonate, 4-acetaminophenyl ethylcarbonates and 4-acetaminophenyl propylcarbonates) prodrugs of acetaminophen derivatives were determined in aqueous and micellar media. The cationic micelles of cetyltrimethylammonium bromide (CTABr) and cetyltrimethylammonium sulfate [(CTA) 2 SO 4 ] catalyzed the rate of the reaction. The anionic sodium dodecyl sulphate (SDS) and non-ionic Brij-35 surfactants inhibited the rate of the reaction. Added salt did not influence the rate of the reaction in the aqueous medium but decreased the values of observed rate constant in the micellar media. The rate enhancement in cationic micelles was treated by applying the pseudophase ion exchange model while the inhibition effect on the rate of hydrolysis was described using the Poisson-Boltzman pseudophase model. The binding constant (K s ) for the acetaminophen derivatives increased with increasing hydrocarbon chain length while the values of micellar rate constant (k m ) decreased with the increase in chain length. The increase in values of K s and decrease in k m are ascribed to the hydrophobic interaction between the acetaminophen derivative and surfactant molecule and molecular orientation of the substrate in the micelles.

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“…Among metal nanoparticles, Ag nanoparticles (AgNPs) have received considerable attention because of their surface plasmon properties, ease of preparation, green nature, antimicrobial properties, and affordable cost. Several chemical synthetic protocols [23,24,25] as well as biosynthetic procedures [26] and various reagents such as polymers, citrate, surfactants, and plant extracts have been used as reducing and/or stabilizing agents to fabricate AgNPs. Compared to chemical reduction methods, biosynthetic procedures are considered greener and are more preferred because in these processes, chemicals such as sodium borohydride, hydrazine, surfactants, and polymers, which may have carcinogenic or other toxic effects, are not used as reducing and protecting agents.…”

Section: Introductionmentioning

confidence: 99%

Biogenic Silver Nanoparticles for Trace Colorimetric Sensing of Enzyme Disrupter Fungicide Vinclozolin

et al. 2019

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We report a novel, simple, efficient, and green protocol for biogenic synthesis of silver nanoparticles (AgNPs) in aqueous solution using clove (Syzygium aromaticum) extract as a reducing and protecting agent. Ultraviolet-visible (UV-Vis) spectroscopy was employed to monitor the localized surface plasmon resonance (LSPR) band of clove extract-derived AgNPs prepared under various conditions. Fourier-transform infrared (FTIR) spectroscopy analysis provided information about the surface interaction of the clove extract with the AgNPs. Ultrahigh-resolution transmission electron microscopy (UHRTEM) results confirmed the formation of spherical, uniformly distributed clove extract-capped AgNPs with sizes in the range of 2–20 nm (average size: 14.4 ± 2 nm). Powder X-ray diffractometry analysis (PXRD) illustrated the formation of pure crystalline AgNPs. These AgNPs were tested as a colorimetric sensor to detect trace amounts of vinclozolin (VIN) by UV-Vis spectroscopy for the first time. The AgNP-based sensor demonstrated very sensitive and selective colorimetric detection of VIN, in the range of 2–16 µM (R2 = 0.997). The developed sensor was green, simple, sensitive, selective, economical, and novel, and could detect trace amounts of VIN with limit of detection (LOD) = 21 nM. Importantly, the sensor was successfully employed for the determination of VIN in real water samples collected from various areas in Turkey.

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A kinetic study of silver nanoparticles formation from paracetamol and silver(I) in aqueous and micellar media

Cited by 26 publications

References 31 publications

Fabrication and characterization of silver/titanium dioxide composite nanoparticles in ethylene glycol with alkaline solution through sonochemical process

Fabrication and characterization of silver/titanium dioxide composite nanoparticles in ethylene glycol with alkaline solution through sonochemical process

Micellar Effects upon the Alkaline Hydrolysis of Acetaminophen Prodrugs: Carboxylic and Carbonic Acid Esters

Biogenic Silver Nanoparticles for Trace Colorimetric Sensing of Enzyme Disrupter Fungicide Vinclozolin

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