Ultrafine silver nanoparticles obtained from ethylene glycol at room temperature: catalyzed by tungstate ions

Li, Jin; Zhu, Junwu; Liu, Xiaoheng

doi:10.1039/c3dt52242c

Cited by 39 publications

(25 citation statements)

References 58 publications

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“…Then, Ag + adsorbs on the surface of ZnO nanorods via the electrostatic attraction in AgNO 3 solution. Particularly, in this method, sodium tungstate as a catalyst can dramatically speed up the reduction of silver ions, and EG acts as both a solvent and a reducing agent to reduce silver ions to Ag metal at room temperature, which has been reported in our previous result 23 .…”

Section: Fabrication Of Gas Sensors and Response Testmentioning

confidence: 85%

Synthesis of ZnO–Ag Hybrids and Their Gas-Sensing Performance toward Ethanol

Ding

Zhu

Yao

et al. 2015

Ind. Eng. Chem. Res.

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Herein, we describe a facile surfactant-free method to prepare the ZnO-Ag hybrids at room temperature for improving gas-sensing performance towards ethanol.Characterizations indicate that Ag nanoparticles are well deposited on the surface of ZnO nanorods. It is interesting to note that the introduction of only 1 wt% Ag in ZnO-Ag hybrids leads to the impressive enhancement in gas-sensing properties of ZnO. Notably, the ZnO-Ag hybrids can offer gas response value of 884.7 towards 1000 ppm of ethanol (approximately 12.6 times higher than pure ZnO nanorods). Meanwhile, the hybrids exhibit excellent stability with only ±5 % fluctuation of gas response value over a period of 480 cycles. Moreover, the abovementioned hybrids also exhibit well selectivity (about 4.7-52.9 times greater than that of other tested vapors). The high sensitivity, well selectivity and excellent stability presented by ZnO-Ag hybrids make it a potential material for developing an excellent gas-sensing sensor towards ethanol.

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Section: Fabrication Of Gas Sensors and Response Testmentioning

confidence: 85%

Synthesis of ZnO–Ag Hybrids and Their Gas-Sensing Performance toward Ethanol

Ding

Zhu

Yao

et al. 2015

Ind. Eng. Chem. Res.

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“…Ethylene groups detected by FTIR have been reported by [35] to be capable of acting as reducing or capping agent.…”

Section: Discussionmentioning

confidence: 99%

Green Synthesis of Silver Nanoparticles Using Apple Extract and Its Antibacterial Properties

Ali

Yahya

Sekaran

et al. 2016

Advances in Materials Science and Engineering

125

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Silver nanoparticles (AgNPs) were synthesized using apple extract as a reducing agent and aqueous silver nitrate as the precursor. The AgNPs formation was observed as a color change of the mixture from colorless to dark-brownish. The X-ray diffraction pattern confirmed the presence of only Ag crystallites, and the dynamic light scattering estimates the average sizes of the AgNPs to be 30.25 ± 5.26 nm. Furthermore, Fourier Transform Infrared as well as UV-vis spectroscopy identifies ethylene groups as the reducing agent and capping agent for the formation of the AgNPs. This green synthesis provides an economic, eco-friendly, and clean synthesis route to AgNPs. AgNPs in suspension showed activity against Gram-negative and Gram-positive bacteria with minimum bactericidal concentrations (MBCs) to be in the range from 125 μg/mL to 1000 μg/mL.

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“…8 All of these synthesis methods involve the use of reductants and stabilizers as the precursors. Some examples of the common reductant are sodium borohydride, 9-10 sodium citrate, 11 dimethyl sulfoxide (DMSO), 12 ethylene glycol (EG), 13 formaldehyde, 14 and ascorbic acid. 15 While some example of the common stabilizers is a halide, carboxylate, and polymer compounds.…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Silver Nanoparticle and Its Antibacterial Activity

2017

RJC

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Silver nanoparticle (Ag-np) was successfully synthesized by using the simple green chemistry method. Its antibacterial activity was studied against Staphylococcus aureus and Escherichia coli according to agar well diffusion method. The green synthesis was carried out by mixing the silver nitrate, glucose, and starch as precursors at 90 0 C for 4 hours. The UV-Vis spectra show the characteristic of spherical Ag-np in the range of 410-425 nm and it is confirmed by TEM image. The Ag-np has an average diameter of 8.41 ± 4.37 nm. As the reductant mole composition increases, the SPR decreases and shifts to red due to the further growth of the Ag-np. When the stabilizer composition increases, the SPR intensity also increases and shifts to red. The formed Ag-np is stable even after one-month synthesis. The antibacterial test on the Ag-np was carried out against gram-positive bacteria (Staphylococcus aureus) and gram-negative bacteria (Escherichia coli). The result shows that a higher concentration of Ag-np is required to kill Staphylococcus aureus compared to Escherichia coli.

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Ultrafine silver nanoparticles obtained from ethylene glycol at room temperature: catalyzed by tungstate ions

Cited by 39 publications

References 58 publications

Synthesis of ZnO–Ag Hybrids and Their Gas-Sensing Performance toward Ethanol

Synthesis of ZnO–Ag Hybrids and Their Gas-Sensing Performance toward Ethanol

Green Synthesis of Silver Nanoparticles Using Apple Extract and Its Antibacterial Properties

Green Synthesis of Silver Nanoparticle and Its Antibacterial Activity

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