Thermal decomposition of silver oxalate

Болдырев, В. В.

doi:10.1016/s0040-6031(02)00044-8

Cited by 76 publications

(63 citation statements)

References 30 publications

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“…Thermal decomposition of Ag 2 C 2 O 4 occurred around 140°C which is in agreement with the reports in literature [7]. TGA profile is shown in the Fig.…”

Section: Resultssupporting

confidence: 91%

“…The white precipitate formed was filtered, washed with distilled water, dried at 60°C and stored in a dark bottle [7]. Formation of Ag 2 C 2 O 4 was confirmed by TGA.…”

Section: Methodsmentioning

confidence: 99%

“…If the decomposition temperature of metal complexes is low and the product is metal, this reaction can be utilized for the synthesis of nanoparticles. It has been known that silver oxalate (Ag 2 C 2 O 4 ) decomposes at around 140°C and yields metallic silver and CO 2 [7]. In this paper, the synthesis of Ag nanoparticles by thermal decomposition of silver oxalate (Ag 2 C 2 O 4 ) in water and ethylene glycol media has been explored.…”

Section: Introductionmentioning

confidence: 99%

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Thermal decomposition as route for silver nanoparticles

et al. 2006

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Single crystalline silver nanoparticles have been synthesized by thermal decomposition of silver oxalate in water and in ethylene glycol. Polyvinyl alcohol (PVA) was employed as a capping agent. The particles were spherical in shape with size below 10 nm. The chemical reduction of silver oxalate by PVA was also observed. Increase of the polymer concentration led to a decrease in the size of Ag particles. Ag nanoparticle was not formed in the absence of PVA. Antibacterial activity of the Ag colloid was studied by disc diffusion method.

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“…Thermal decomposition of Ag 2 C 2 O 4 occurred around 140°C which is in agreement with the reports in literature [7]. TGA profile is shown in the Fig.…”

Section: Resultssupporting

confidence: 91%

“…The white precipitate formed was filtered, washed with distilled water, dried at 60°C and stored in a dark bottle [7]. Formation of Ag 2 C 2 O 4 was confirmed by TGA.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal decomposition as route for silver nanoparticles

et al. 2006

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“…Silver nanoparticles have wide industrial applications in electrocatalysis, chemical sensors, catalysis and optical devices [5][6][7][8]. Recently, the synthesis of silver nanoparticles has been reported using several methods: such as chemical, gamma-irradiation, thermal decomposition, photochemical and biosynthetic using microbes and plant resources [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Ipomea carnea-based silver nanoparticle synthesis for antibacterial activity against selected human pathogens

Daniel

Bayyurt

Muthukumar

et al. 2012

Journal of Experimental Nanoscience

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“…Oxalic acid has been noted to decompose to carbon dioxide, carbon monoxide, and water [13, 20 -23], while the metal oxalates primarily produce metal oxide on decomposition. Silver oxalate decomposes explosively [24].…”

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confidence: 99%

Old acid, new chemistry. Negative metal anions generated from alkali metal oxalates and others

Curtis

Renaud

Holmes

et al. 2010

J. Am. Soc. Mass Spectrom.

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A brief search in Sci Finder for oxalic acid and oxalates will reward the researcher with a staggering 129,280 hits. However, the generation of alkali metal and silver anions via collision-induced dissociation of the metal oxalate anion has not been previously been reported, though Tian and coworkers recently investigated the dissociation of lithium oxalate [18]. The exothermic decomposition of alkali metal oxalate anion to carbon dioxide in the collision cell of a triple quadrupole mass spectrometer leaves no place for the electron to reside, resulting in a double electron-transfer reaction to produce an alkali metal anion. This reaction is facilitated by the negative electron affinity of carbon dioxide and, as such, the authors believe that metal oxalates are potentially unique in this respect. The observed dissociation reactions for collision with argon gas (1.7-1.8 ϫ 10 Ϫ3 mbar) for oxalic acid and various alkali metal oxalates are discussed and summarized. Silver oxalate is also included to demonstrate the propensity of this system to generate transition-metal anions, as well. (J Am Soc Mass Spectrom 2010, 21, 1944 -1946) © 2010 American Society for Mass Spectrometry T he chemical concept of metals producing positive ions (cations) and non-metals negative ions (anions) is a fundamental precept taught as early as in high school and reinforced throughout a person's university career. However, under certain conditions, metal anions can be created and, as such, their electron affinities are well characterized and calculated both experimentally and theoretically [1]. In solution, alkali metal anions (except lithium) in 'supra molecule complexes' have been prepared in THF and crown ethers. These characteristically blue solutions are now fabricated to control the amount of metal ions, including metal anions. Such solutions have been extensively studied for use in organic synthesis and elucidation of charge-transfer to solvent dynamics (CTTS) [2][3][4][5][6][7][8][9]. In the gas phase, a beam of positively charged alkali cations created from metal vapor can undergo double electron capture to generate a low density negative ion beam [10]. Other means of negative ion generation include discharge and sputter ion sources, namely Cs ϩ ions with a suitable metal cathode [11]. Studies in ion traps utilize dissociative electron attachment to create metal anions [12]. Thus, metal anions are created only via complex experimental procedures or specific experimental apparatus. This paper outlines a method for the production of metal anions requiring a simple oxalate salt solution and a commercially available triple quadrupole mass spectrometer.Oxalic acid is one of the oldest known acids, first isolated from wood sorrel (Oxalis acetosella). It is often found as salt oxalates in many biological systems; particular well known is calcium oxalate found in rhubarb root, known for both its medicinal properties and as a potential poison. Ammonium oxalate is found in guano and there is evidence for the sodium and potassium salts pres...

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Thermal decomposition of silver oxalate

Cited by 76 publications

References 30 publications

Thermal decomposition as route for silver nanoparticles

Thermal decomposition as route for silver nanoparticles

Ipomea carnea-based silver nanoparticle synthesis for antibacterial activity against selected human pathogens

Old acid, new chemistry. Negative metal anions generated from alkali metal oxalates and others

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