Phytosynthesis of Au, Ag and Au–Ag bimetallic nanoparticles using aqueous extract and dried leaf of Anacardium occidentale

Sheny, D.S.; Mathew, Jyothis; Philip, Daizy

doi:10.1016/j.saa.2011.02.051

Cited by 365 publications

(159 citation statements)

References 66 publications

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“…However, the diffraction peaks are broad which indicates that small crystallite size is obtained. This is in good agreement with the report done by Sheny et al (2011) and .…”

Section: Characterization Of Agnpssupporting

confidence: 93%

“…To the best of our knowledge, there were no reports published for the rapid green synthesis of silver NPs by the use of A. occidentale fresh leaves extract at room temperature/higher temperature, whereas Sheny et al (2011) were synthesized AgNPs by dried powder of A. occidentale (Sheny et al 2011) (ii) developing a novel probe for sensing chromium ions [Cr(VI)] by the as prepared AgNPs, (iii) characterization of the synthesized NPs using UV-Visible spectrophotometer, theoretical particle size, XRD, SEM and TEM.…”

Section: Introductionmentioning

confidence: 99%

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Rapid detection of Cr(VI) by AgNPs probe produced by Anacardium occidentale fresh leaf extracts

Balavigneswaran¹,

Kumar²,

Packiaraj³

et al. 2013

Appl Nanosci

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Nowadays necessities for the green synthesis of nanoparticles are enlarged because of its neutral toxicity and eco-friendly advantages. In this present study, we have explored the rapid biosynthesis of AgNPs at room temperature by the fresh leaf aqueous extract of Anacardium occidentale. Aqueous extracts were prepared at different temperatures 60, 80 and 100°C. Formation of silver nanoparticles (AgNPs) was confirmed by surface plasmon resonance (SPR) peak observed around 400-420 nm in UV-Visible spectra. Among the extracts prepared, 80°C extract showed good shift in UV-Visible spectrum during Cr(VI) detection and a good linear relationship was found between the absorbance ratio (A 510 /A 400 ) against 100 mM-1 lM concentration of Cr(VI). Cr(VI) was confirmed by the red shift of SPR position from 400 to 510 nm. Detection limit of our prepared probe is 1 lM and this simple technique exhibiting high selectivity to Cr(VI) over other tested heavy metal ions. Finally, efficient 80°C extract synthesized AgNPs were characterized by XRD, SEM and TEM. XRD characterization confirmed its face centered cubic structure and confirmed that the prepared AgNPs are crystalline in nature. TEM and SEM characterization results revealed that the AgNPs are in spherical nature. The size of AgNPs was found to be 40-60 nm.

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“…However, the diffraction peaks are broad which indicates that small crystallite size is obtained. This is in good agreement with the report done by Sheny et al (2011) and .…”

Section: Characterization Of Agnpssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Rapid detection of Cr(VI) by AgNPs probe produced by Anacardium occidentale fresh leaf extracts

Balavigneswaran¹,

Kumar²,

Packiaraj³

et al. 2013

Appl Nanosci

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show abstract

“…By monitoring the LSPR band from 0 to 55 min, it can be seen that there is a blue shift of k max from 441 to 411 nm with the consequent color changes from reddish brown to yellow. This kind of blue shift is being reported to be due to the formation of smallsized nanoparticles [48] and narrowing of peak with time implies monodispersed AgNPs are formed with time and about 30 min may be taken as appropriate to get uniformsized nanoparticles. For comparison, the title reaction is also studied at ambient conditions in the absence of sunlight.…”

Section: Uv-vis Spectra Of Agnpsmentioning

confidence: 97%

Photobiological synthesis of noble metal nanoparticles using Hydrocotyle asiatica and application as catalyst for the photodegradation of cationic dyes

2015

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Solar light induced photo catalysis by plasmonic nanoparticles such as Au and Ag is an important field in green chemistry. In this study an environmental benign method was investigated for the rapid synthesis of colloidal Ag and AuNPs using the extract of Hydrocotyle asiatica, as a reducing and stabilizing agent under sunlight irradiation. The nanoparticles were formed in few seconds and were characterized by UV-Vis., FT-IR, TEM, EDAX, XRD, DLS and Zetasizer. The nanoparticles were stable in aqueous solution for more than 6 months. TEM analysis established that the Ag and AuNPs were predominantly spherical with average size of 21 and 8 nm, respectively. The flavonoids and glycosides from the extract of H. asiatica were proved to be responsible for the reduction and capping through FT-IR analysis. The antimicrobial studies of AgNPs showed effective inhibitory activity against the clinical strains of gram-negative and positive bacteria. The localized surface plasmon resonance of AgNPs was used for the photo-driven degradation of cationic dyes (malachite green and methylene blue). Thus, this green technique can be used for bulk production of AgNPs, and thus prepared nanoparticles may be used for removal of dyes from effluent. Graphical Abstract

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“…[1][2][3][4][5] Nanoparticles are also interesting because of their huge increase in surface area and a surge in conductivity compared to their metal counterparts. Moreover, metal nanoparticles also show surface plasmon resonance.…”

Section: Introductionmentioning

confidence: 99%

“…These properties make them useful to many applications such as bio-sensing, imaging, drug delivery, HIV treatment, Cancer treatment, optical spectroscopy and Surface Enhanced Raman scattering (SERS). [2][3][4] Amongst different type of metal nanoparticles Ag NPs (Silver nanoparticles) are of great interest due to their potent antimicrobial activity against different type of pathogens. [6][7][8][9][10] This extends their application into medicine, wound healing, dental materials, coating of stainless steel material, water treatment, sunscreen lotions, elimination of microorganisms on textile fabrics, cosmetics, optical transparent composites, polymer composites etc.…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Silver Nanoparticles using Aqueous Plant Extracts and its Application as Optical Sensor

Koshy¹

2017

IJBSBE

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Phytosynthesis of Au, Ag and Au–Ag bimetallic nanoparticles using aqueous extract and dried leaf of Anacardium occidentale

Cited by 365 publications

References 66 publications

Rapid detection of Cr(VI) by AgNPs probe produced by Anacardium occidentale fresh leaf extracts

Rapid detection of Cr(VI) by AgNPs probe produced by Anacardium occidentale fresh leaf extracts

Photobiological synthesis of noble metal nanoparticles using Hydrocotyle asiatica and application as catalyst for the photodegradation of cationic dyes

Green Synthesis of Silver Nanoparticles using Aqueous Plant Extracts and its Application as Optical Sensor

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