Synthesis of silver nanoparticles by electron irradiation of silver acetate

2006 ◽  
Vol 251 (2) ◽  
pp. 425-428 ◽  
Author(s):  
Yue Li ◽  
Yong Nam Kim ◽  
Eun Je Lee ◽  
Wei Ping Cai ◽  
Sung Oh Cho
Keyword(s):  
Silver Nanoparticles ◽  
Electron Irradiation ◽  
Silver Acetate

Synthesis of Silver Nanoparticles by Hydrothermal Processing

2021 ◽  
Vol 323 ◽  
pp. 1-7
Author(s):  
Enkhtuul Surenjav ◽  
Battseveen Buyankhishig ◽  
Narandalai Byamba-Ochir ◽  
Nemekhbayar Davaadorj ◽  
Zhi Qiang Song ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Supercritical Water ◽  
Batch Reactor ◽  
Acetate Solution ◽  
Silver Acetate ◽  
Silver Particles ◽  
Uniform Size ◽  
Low Dielectric ◽  
Water Treatments ◽  
Hydrothermal Water

Hydrothermal water treatments of silver acetate (CH3COOAg) were investigated to reveal the factors controlling the formation of silver nanoparticles (AgNPs) with uniform size distribution. The effects of reaction time and concentration of silver acetate solution on the synthesis of Ag nanoparticles were studied, and the fabricated products were characterized. The hydrothermal water treatments of CH3COOAg were carried out between the temperatures of 250 - 450 °C in a batch reactor. In supercritical water regions, at 400 °C and a pressure of 31.5 MPa, silver particles are rapidly synthesized due to reaction rate increases at a low dielectric constant of supercritical water. The preparation of the silver particles with 30-80 nm in size showed a highly crystalline structure identified by XRD and TEM observations.

scholarly journals Synthesis of silver nanoparticles using supercritical water

2018 ◽  
pp. 22-25
Author(s):  
Buyankhishig B ◽  
Narandalai B ◽  
Enkhtuul S
Keyword(s):  
Particle Size ◽  
Silver Nanoparticles ◽  
Electron Microscope ◽  
Reaction Time ◽  
Supercritical Water ◽  
Silver Salt ◽  
Activated Carbons ◽  
Batch Reactor ◽  
Acetate Solution ◽  
Silver Acetate

Supercritical water (SCW) technology is a relatively novel and green method compared with others for the synthesize of metal nanoparticles. It is considered one of the most suitable methods for loading nanoparticles in surface of porous materials due to the water in supercritical conditions has a high diffusivity, well dispersive and it has a same carrier characteristic as like a gas. Silver nanoparticles and silver loaded activated carbons were synthesized using silver acetate solution under supercritical water condition at 4000C and 31.15 MPa in a batch reactor. This study was investigated effect of operational parameters on the particle size of silver nanoparticles in particularly the concen-tration of silver salt solution and the reaction time. The experiments were carried out to test the silver salt concentra-tion at 0.01 M, 0.02 M, 0.05M, and the reaction time of 15 and 30 minutes. When the silver acetate concentration and reaction time increased agglomerations of silver particles were observed on the surface of activated carbons. The structure, morphology and particle size of synthesized products were determined by X-ray diffraction (XRD), Scan-ning electron microscope (SEM) and Transmission electron microscope (TEM). Суперкртитик усан орчинд мөнгөний нанопартиклыг гарган авах Хураангуй: Суперкритик усны арга нь металлын нанопартикл гарган авах бусад аргуудтай харьцуулахад харьцангуй шинэ арга юм. Суперкритик нөхцөл дахь ус нь диффузийн коэффициент өндөртэй, тархалт сайтай, хийтэй адил зөөж тээвэрлэх шинж чанар үзүүлдэг тул сүвэрхэг материал дээр нанопартикл үүсгэхэд тохиромжтой аргуудын нэг гэж үздэг. Мөнгөний нанопартикл болон идэвхжүүлсэн нүүрсэн дээр суулгасан мөнгөний нанопартиклыг суперкритик усны аргаар мөнгөний давсны усан уусмал хэрэглэн гарган авсан. Мөнгөний нанопартиклыг гарган авахад нөлөөлөх гол хүчин зүйлүүдэд хамаарах мөнгөний давсны уусмалын концентрац болон урвал явагдах хугацааны нөлөөг судалсан бөгөөд концентрацыг 0.01 М, 0.02 М ба 0.05 М, харин урвал явагдах хугацааг 15 ба 30 минут гэсэн нөхцөлүүдэд туршилтыг явуулсан. Урвал явагдах хугацаа болон мөнгөний давсны уусмалын концентрац ихсэхэд үүссэн мөнгөний жижиг хэсгүүдийн бөөгнөрөл илүү нэмэгдэж байсан. Гарган авсан материалуудын талст бүтэц, түүний хэмжээ болон морфологийн шинж чанарыг рентген дифрактометр (XRD), сканнинг электрон микроскоп (SEM) болон нэвтрүүлэлтийн электрон микроскоп (TEM) ашиглан тодорхойлсон. Түлхүүр үг: Суперкритик ус, мөнгөний нанопартикл, урвал явагдах хугацаа, уусмалын концентрац.

scholarly journals INFLUENCE OF LIGHTING ON THE SELF-ORGANIZATION PROCESS IN CYSTEINE-SILVER SOLUTION

2021 ◽  
pp. 60-68
Author(s):  
Анна Нориковна Адамян ◽  
Александра Ивановна Иванова ◽  
Елена Михайловна Семенова ◽  
Максим Дмитриевич Малышев ◽  
Светлана Дмитриевна Хижняк ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Plasmon Resonance ◽  
Self Assembly ◽  
The Self ◽  
Self Organization ◽  
Assembly Process ◽  
Silver Acetate ◽  
Silver Solution ◽  
Organization Process

Комплексно исследовано влияние дневного освещения на процесс самоорганизации в цистеин-серебряном растворе (ЦСР) и гидрогелях на его основе. Установлено, что ЦСР на основе L-цистеина и ацетата серебра под действием освещения окрашивается сначала в желтый, а затем в коричневый цвет, что является следствием плазмонного резонанса на образующихся наночастицах серебра (НЧС) в ЦСР и гидрогелях. Предложена модель формирования НЧ в гидрогеле. The effect of daylight on the self-assembly process in cysteine-silver solution (CSS) and hydrogels based on it has been comprehensively studied. It was found that CSS based on L-cysteine and silver acetate under the action of illumination first turns yellow and then brown, which is a consequence of plasmon resonance on the resulting silver nanoparticles in CSS and hydrogels. A model for the formation of silver nanoparticles in a hydrogel is proposed.

scholarly journals Formation of Silver Nanoparticles in PVA-PEG Hydrogel under Electron Irradiation

2019 ◽  
Vol 64 (1) ◽  
pp. 41
Author(s):  
V. B. Neimash ◽  
H. D. Kupianskyi ◽  
I. V. Olkhovyk ◽  
V. I. Styopkin ◽  
P. M. Lytvynchuk ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Electron Irradiation ◽  
Irradiation Dose ◽  
Chemical Reduction ◽  
Total Concentration ◽  
3D Microstructure ◽  
Order Of Magnitude ◽  
Radiation Induced ◽  
Electron Irradiation Dose ◽  
Scanning Electron

The formation of silver nanoparticles in a hydrogel on the basis of polyvinyl alcohol and polyethylene glycol at its crosslinking under the electron irradiation has been studied using the optical spectroscopy and scanning electron microscopy methods. The growth of nanoparticles 40–70 nm in size and their clustering into aggregates about a few hundred nanometers in diameter are demonstrated. The total concentration of nanoparticles and their size correlate with the concentration of ionic silver in the initial solution and the electron irradiation dose. The formation of nanoparticles is interpreted as a result of the radiation-induced chemical reduction of silver in the solution that is spatially confined in the cells of a 3D microstructure in the crosslinked hydrogel. The radiation-crosslinked hydrogel demonstrates an antiseptic effect for 7 of 8 tested microorganisms at silver concentrations of 0.001–0.003 wt.%, which is at least an order of magnitude lower than effective concentrations of ionic and colloidal silvers.

scholarly journals Distribution of silver in rats following 28 days of repeated oral exposure to silver nanoparticles or silver acetate

2011 ◽  
Vol 8 (1) ◽  
pp. 18 ◽  
Author(s):  
Katrin Loeschner ◽  
Niels Hadrup ◽  
Klaus Qvortrup ◽  
Agnete Larsen ◽  
Xueyun Gao ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Oral Exposure ◽  
Silver Acetate

Formation of silver nanoparticles in photothermorefractive glasses during electron irradiation

2011 ◽  
Vol 56 (5) ◽  
pp. 662-667 ◽  
Author(s):  
A. I. Ignat’ev ◽  
A. V. Nashchekin ◽  
V. M. Nevedomskii ◽  
O. A. Podsvirov ◽  
A. I. Sidorov ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Electron Irradiation

A GRAM SCALE SYNTHESIS OF MONODISPERSED SILVER NANOPARTICLES CAPPED BY CARBOXYLATES AND THEIR LIGAND EXCHANGE

2008 ◽  
Vol 17 (02) ◽  
pp. 131-142 ◽  
Author(s):  
CHANG-DAE KEUM ◽  
NORIYUKI ISHII ◽  
KANAE MICHIOKA ◽  
PRIASTUTI WULANDARI ◽  
KAORU TAMADA ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Ag Nanoparticles ◽  
Myristic Acid ◽  
Ligand Exchange ◽  
Room Temperature ◽  
Simple Procedure ◽  
Average Diameter ◽  
Localized Surface Plasmons ◽  
Silver Acetate ◽  
Metal Core

In this paper, we report a simple yet powerful synthetic method for obtaining monodispersed silver nanoparticles by direct thermal decomposition of two materials — one is silver acetate as a source of the metal core and the other is myristic acid as a capping agent. The reaction was performed at 250°C, the boiling point of myristic acid, without additional solvent. The nucleation and growth of the particles were monitored by dynamic light scattering in order to optimize the reaction time. By this simple procedure, we could obtain uniformly sized Ag nanoparticles with the average diameter of 4.8 ± 0.1 nm. Although the particles were synthesized at high temperature, the ligand exchange between myristates and alkanethiolates can be achieved at room temperature. Significant characteristics of Ag nanoparticles attributed to localized surface plasmons were investigated.

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