Fast and facile synthesis of silica coated silver nanoparticles by microwave irradiation

Bahadur, Newaz Mohammed; Furusawa, Takeshi; Sato, Masahide; Kurayama, Fumio; Siddiquey, Iqbal Iqbal Ahmed; Suzuki, Noboru

doi:10.1016/j.jcis.2010.12.016

Cited by 95 publications

(64 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In fact, biosynthesis approach has been considered the most effective in the synthesis of metal nanoparticles. Microwave irradiation (MWI) is considered to be highly effective technology and is widely used in the synthesis of nanoparticles because of more homogeneous heating process and can speed up the reaction rate by orders of magnitude compared with conventional heating (Bahadur et al 2011;Jiang et al 2013). Microwave synthesis has been increasingly applied in various fields of chemistry and materials science (Singh et al 2012;Tanan and Saengsuwan 2014) due to its generally simple, rapid volumetric heating, and the consequent dramatic increase in reaction rate.…”

Section: Introductionmentioning

confidence: 99%

Microwave-assisted synthesis of silver nanoparticles from Origanum majorana and Citrus sinensis leaf and their antibacterial activity: a green chemistry approach

Singh

Rawat

Isha

2016

Bioresour. Bioprocess.

View full text Add to dashboard Cite

Background: Silver nanoparticles (SNPs) play important role in the field of optics and electronics and also as a novel antibacterial agents. Here, we report a simple and green method for the biosynthesis of SNPs using aqueous leaf extract of Origanum majorana and Citrus sinensis as a novel bio source of cost-effective, non-hazardous reducing, and stabilizing agents. A 3 mM solution of silver nitrate was prepared. Five milliliter aqueous leaf extract was slowly added to 20 ml silver salt solution (3 mM) with constant stirring. No noticeable color change was observed. The solution was then heated in domestic microwave for variable time intervals. The intense brown colored solution was obtained on 1 min heating with O. majorana and 5 min heating with C. sinensis extract. The intense brown color indicated the formation of SNPs. The antibacterial activity of synthesized SNPs was investigated.Results: SNPs were rapidly synthesized using aqueous leaf extract of O. majorana and C. sinensis on microwave irradiation. Formation of SNPs was confirmed by the change in color from yellowish green to brown and absorption maximum around ~420 and 410 nm due to surface plasmon resonance of SNPs. They were also characterized by other physical-chemical techniques like Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope coupled with X-ray energy dispersive spectroscopy, and high-resolution transmission electron microscopy. TEM analysis showed the presence of feather-shaped NPs in O. majorana and spherical as well as cubical-shaped NPs in C. sinensis-mediated SNPs. The synthesized SNPs showed significance antibacterial activity against two human pathogenic strains. Conclusion:The SNPs were synthesized using leaf extract of plants. This synthesis method is nontoxic, eco-friendly, and a low-cost technology for the large-scale production. The SNPs can be used as a new generation of antibacterial agents.

show abstract

Section: Introductionmentioning

confidence: 99%

Microwave-assisted synthesis of silver nanoparticles from Origanum majorana and Citrus sinensis leaf and their antibacterial activity: a green chemistry approach

Singh

Rawat

Isha

2016

Bioresour. Bioprocess.

View full text Add to dashboard Cite

show abstract

“…Various methods have been used to prepare Ag@SiO 2 nanocomposites [9,[11][12][13][14], where the silver nanoparticles are employed as seeds followed by sol-gel formation of silica shell. Some coating processes involve the use of coupling agents.…”

Section: Introductionmentioning

confidence: 99%

Ammonia-free preparation of Ag@SiO 2 core/shell nanoparticles

Jia

et al. 2015

Applied Surface Science

View full text Add to dashboard Cite

“…The reaction mixture was refluxed for 12 h, and then the solvent was removed under reduced pressure. The residue was washed with 10 mL toluene to afford sorbent as brownish powder [22,23]. Fig.…”

Section: Synthesis Of the Sorbentmentioning

confidence: 99%

Ultra-trace determination of arsenic species in environmental waters, food and biological samples using a modified aluminum oxide nanoparticle sorbent and AAS detection after multivariate optimization

2015

View full text Add to dashboard Cite

We describe a simple and efficient method for solid phase extraction and speciation of trace quantities of arsenic. It is based on the use of functionalized aluminum oxide nanoparticles and does not require any oxidation or reduction steps. The experimental parameters affecting extraction and quantitation were optimized using fractional factorial design methods. Adsorbed arsenic was eluted from the sorbent with 1 M hydrochloric acid and determined by graphite furnace atomic absorption spectrometry. Preconcentration factors up to 750 were achieved depending on the sample volume. Studies on potential interferences by various anions and cations showed the method to be highly selective. Under optimum conditions, the calibration plots are linear in the 5.0 to 280 ng L −1 and 8.0 to 260 ng L −1 concentration ranges for As(III) and total arsenic, respectively. The detection limits (calculated for S/N ratios of 3) are 1.81 and 1.97 ng L −1 for As(III) and total arsenic, respectively. The method was successfully applied to the determination and speciation of arsenic in (spiked) environmental, food and biological samples and gave good recoveries. The method was validated using a certified geological reference material.

show abstract

Fast and facile synthesis of silica coated silver nanoparticles by microwave irradiation

Cited by 95 publications

References 52 publications

Microwave-assisted synthesis of silver nanoparticles from Origanum majorana and Citrus sinensis leaf and their antibacterial activity: a green chemistry approach

Microwave-assisted synthesis of silver nanoparticles from Origanum majorana and Citrus sinensis leaf and their antibacterial activity: a green chemistry approach

Ammonia-free preparation of Ag@SiO 2 core/shell nanoparticles

Ultra-trace determination of arsenic species in environmental waters, food and biological samples using a modified aluminum oxide nanoparticle sorbent and AAS detection after multivariate optimization

Contact Info

Product

Resources

About