scholarly journals Thermal Decomposition of Silver Acetate: Physico-Geometrical Kinetic Features and Formation of Silver Nanoparticles

2016 ◽  
Vol 120 (16) ◽  
pp. 8841-8854 ◽  
Author(s):  
Masayoshi Nakano ◽  
Takayuki Fujiwara ◽  
Nobuyoshi Koga
Keyword(s):  
Thermal Decomposition ◽  
Silver Nanoparticles ◽  
Silver Acetate ◽  
Kinetic Features

scholarly journals Thermal decomposition as route for silver nanoparticles

2006 ◽  
Vol 2 (1) ◽  
pp. 44-48 ◽  
Author(s):  
S. Navaladian ◽  
B. Viswanathan ◽  
R. P. Viswanath ◽  
T. K. Varadarajan
Keyword(s):  
Thermal Decomposition ◽  
Silver Nanoparticles

Study of thermal decomposition of silver acetate

2007 ◽  
Vol 90 (3) ◽  
pp. 813-816 ◽  
Author(s):  
V. Logvinenko ◽  
O. Polunina ◽  
Yu. Mikhailov ◽  
K. Mikhailov ◽  
B. Bokhonov
Keyword(s):  
Thermal Decomposition ◽  
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.

The thermal decomposition of methylene chloride

1959 ◽  
Vol 250 (1261) ◽  
pp. 180-196 ◽  
Keyword(s):  
Thermal Decomposition ◽  
Hydrogen Chloride ◽  
Methylene Chloride ◽  
Flow System ◽  
Vessel Diameter ◽  
Chlorine Atoms ◽  
System A ◽  
Pressure Time ◽  
A Chain ◽  
Kinetic Features

The thermal decomposition of methylene chloride has been studied in the temperature range 500 to 650 °C by both the static technique of pressure-time measurement and the use of a flow system in conjunction with gas chromatographic analysis. The reaction, which leads principally to carbon and hydrogen chloride is characterized by a slow acceleration, the rate of which decreases with the vessel diameter. In vessels of diameter less than 5 mm the reaction is almost completely inhibited. The reaction rate is increased by the addition of inert gas, nitric oxide and, particularly, by dichlorethylene. Using the flow system a number of chlorinated hydrocarbons were detected as minor products of the reaction and their rate of formation relative to the major products was followed in detail. By identifying some of these as radical recombination products and one, dichlorethylene, as a degenerate branching agent, a delayed branching mechanism has been deduced which explains most of the kinetic features of the reaction as well as the formation of the observed minor products. This involves the production of the intermediate, dichlor­ethylene, in a chain carried by chlorine atoms and dichlormethyl radicals, and the conversion of this to carbon and hydrogen chloride by a coupled chain also involving chlorine atoms. The average primary chain length has been estimated as fifteen by measurement of the rate of formation of the supposed recombination products, but this figure is uncertain since the termination products appear to be destroyed in turn by chlorine atoms generated in the main chain.

A new high-soluble precursor for in situ silver nanoparticle generation in polymers

e-Polymers ◽  
2012 ◽  
Vol 12 (1) ◽  
Author(s):  
Gianfranco Carotenuto ◽  
Mariano Palomba ◽  
Sergio De Nicola
Keyword(s):  
Solid Solution ◽  
Thermal Decomposition ◽  
Silver Nanoparticles ◽  
Organic Salt ◽  
Thermal Decomposition Process ◽  
Contact Free ◽  
Nanoparticle Generation ◽  
Silver Atoms ◽  
Optical Plastics

AbstractPerfectly transparent silver-polystyrene nanocomposites, characterized by a very strong SPR absorption band centered at 421nm, have been prepared by dissolving silver 1,5-cyclooctadiene hexafluoroacetylacetonate into amorphous polystyrene and thermally annealing this solid solution for 10s at 180 °C. The silver atoms generated during the [Ag(hfac)(COD)] thermal decomposition process slowly diffuse into the molten polymeric phase and clusterize, leading to the formation of a contact-free dispersion of silver nanoparticles characterized by a very intensive SPR absorption. Finally, silver 1,5-cyclooctadienehexafluoroacetylacetonate can be conveniently used to dye optical plastics by the strong SPR absorption of nanoscopic silver without transparency loss. In addition, the intensity of coloration can be varied by changing the amount of organic salt dissolved into the polymer.

Direct Transformation into Silver Nanoparticles via Thermal Decomposition of Oxalate-Bridging Silver Oleylamine Complexes

2009 ◽  
Vol 9 (11) ◽  
pp. 6655-6660 ◽  
Author(s):  
Mitsunori Itoh ◽  
Takayoshi Kakuta ◽  
Minami Nagaoka ◽  
Yumiko Koyama ◽  
Masatomi Sakamoto ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Silver Nanoparticles ◽  
Direct Transformation ◽  
Oxalate Bridging

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.

Sign in / Sign up

Export Citation Format

Share Document