Two Highly Stable Silver Nanoparticles: Surface Plasmon Resonance Spectra Study of Silver Nanoparticles Capped with m-Hydroxybenzoic Acid and p-Hydroxybenzoic Acid

Silver nanoparticles capped with m-hydroxybenzoic acid and p-hydroxybenzoic have been successfully synthesized, but the long-term stability data of these silver nanoparticles are not available. In this paper, we report the stability of these two types of silver nanoparticles for a period of 40 weeks observation based on the change of surface plasmon resonance spectra of silver nanoparticles. Silver nanoparticles were synthesized by reduction of silver nitrate with m-hydroxybenzoic acid and p-hydroxybenzoic acid without addition of capping agent. The presence of silver nanoparticles was indicated by the appearance of yellow color due to the surface plasmon resonance of silver nanoparticles. The resulted silver nanoparticles were stored at room temperature and further UV-visible spectrophotometer was used to follow the change in surface plasmon resonance spectra. The surface plasmon resonance spectra of silver nanoparticles were overlapped for the first 18 weeks, followed by little change in the position of absorption maxima (lmax), peak intensity, and width of the absorption peak until the week of 40. Silver nanoparticles capped with m-hydroxybenzoic acid and silver nanoparticles capped with p-hydroxybenzoic acid were highly stable which should make them suitable for further applications. The results show the potential of m-hydroxybenzoic acid and p-hydroxybenzoic acid to become a new reducing agent in the synthesis of highly stable silver nanoparticles. The m-hydroxybenzoic acid and p-hydroxybenzoic acid appeared to act as both reducing and capping agent.

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Characterization of Silver Nanoparticles Synthesized using Latex of Jatropha curcas and Lannea grandis

Journal of Surface Science and Technology ◽

10.18311/jsst/2016/15452 ◽

2017 ◽

Vol 32 (3-4) ◽

pp. 115 ◽

Cited By ~ 2

Author(s):

Santosh Kumar ◽

Dipankar Halder ◽

Atanu Mitra

Keyword(s):

Silver Nanoparticles ◽

Surface Plasmon Resonance ◽

Surface Plasmon ◽

Plasmon Resonance ◽

Jatropha Curcas ◽

Metal Ion ◽

Capping Agent ◽

Synthesis Parameters ◽

Time Of Reaction

This paper reports rapid and eco-friendly biosynthesis of silver nanoparticles using latex of two different plants Jatropha curcas (Jc) and Lannea grandis (Lg). Latex of these plants act as both reducing as well as capping agent. The surface plasmon resonance (SPR) band of as-synthesized silver nanocolloids (AgNC) appeared at 440 nm and 415 nm for the AgNC synthesized by latex of Jc and Lg, respectively. TEM images show that the latex of Lg produced smaller regular-shaped particles than those produced by latex of Jc. The influence of different synthesis parameters like concentration of latex, concentration of metal ion, time of reaction etc., on the morphology of the particles were also studied by monitoring UV-Vis spectra of the samples.

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Preparation of Silver Nanoparticles in Water-Alcohol Mediea

Materials Science Forum ◽

10.4028/www.scientific.net/msf.809-810.78 ◽

2014 ◽

Vol 809-810 ◽

pp. 78-81

Author(s):

Xiao Ning Gao ◽

Dong Bo Tian ◽

Jun Long Wang ◽

Jie Hou ◽

Yong Jun He ◽

...

Keyword(s):

Silver Nanoparticles ◽

Surface Plasmon Resonance ◽

Silver Nitrate ◽

Surface Plasmon ◽

Plasmon Resonance ◽

Alkali Solution ◽

The Stability ◽

Water Alcohol

Stable and uniformly dispersive silver nanoparticles were prepared though reducing silver nitrate with polyvinylpyrrolidone. The effects of preparing conditions on the stability of silver nanoparticles were investigated. The results showed that the surface plasmon resonance (SPR) band of the silver nanoparticles was about 403nm. The silver nanoparticles remained stable for more than one month. Water, alkali solution and glucose could accelerate the reaction. The stability of the silver nanoparticles was increased by adding glucose.

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Colorimetric Detection of Hg(II) Ion Using Silver Nanoparticles Capped with 3-Hydroxybenzoic Acid

Molekul ◽

10.20884/1.jm.2019.14.1.460 ◽

2019 ◽

Vol 14 (1) ◽

pp. 18

Author(s):

Gusrizal Gusrizal ◽

Andi Hairil Alimuddin ◽

Ajuk Sapar ◽

Rizki Noviani Ridwan ◽

Sri Juari Santosa

Keyword(s):

Silver Nanoparticles ◽

Surface Plasmon Resonance ◽

Surface Plasmon ◽

Plasmon Resonance ◽

Colorimetric Detection ◽

Hydroxybenzoic Acid ◽

Surface Plasmon Resonance Peak ◽

Plasmon Resonance Peak ◽

Highly Sensitive ◽

First Time

In this paper, we report for the first time thesimple method for detection of Hg(II) ion in anaqueousmedium using silver nanoparticles capped with 3-hydroxybenzoic acid. Silver nanoparticles capped with 3-hydroxybenzoic acid were preparedby reduction of the silver ion with 3-hydroxybenzoic acid and without surface functionalization. The formation of silver nanoparticles was characterized by a UV-Visible spectrophotometer. The yellowcolloid of prepared silver nanoparticles capped with 3-hydroxybenzoic acid showed a surface plasmon resonance peak at 420 nm. The ability of silver nanoparticles capped with 3-hydroxybenzoic acid in detection was tested by doing a reaction with several metal ions individually(Na(I), K(I), Cu(II), Zn(II), Ca(II), Mg(II), Hg(II), Mn(II), Ni(II), Pb(II), and Co(II)). It was foundthat silver nanoparticles capped with 3-hydroxybenzoic acid highly selective toHg(II) and then the prepared silver nanoparticles were developedfor detection of Hg(II) ion. Addition of 1 mL Hg(II) ion into 4mL the as-preparedsilver nanoparticles reducedthe peak of surface plasmon resonance spectra, andthe reduction of peak intensity was proportional to the concentration of Hg(II) ion. A goodlinear relationship (R2= 0.998) between absorbance at 420 nm and concentrationof Hg(II) over the range 1.0x10-3to 5.5x10-3M was obtained. Silver nanoparticles capped with 3-hydroxybenzoic acid were highly sensitive to Hg (II) ion with the detection limit down to 4.7x10-5M. Application the method to the real water sample showed the excellentresult with recovery ranged from 98 to 101%. The proposed method was found to be useful forthe colorimetric detection of Hg(II) ion in an aqueousmedium.

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