Exchange and reduction of Cu2+ ions in clinoptilolite

Iznaga, I. Rodríguez; Petranovskii, Vitalii; Fuentes, Gastón; Mendoza, Carolina; Aguilar, A. Benítez

doi:10.1016/j.jcis.2007.06.021

Cited by 57 publications

(19 citation statements)

References 47 publications

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“…It was shown previously that silver cluster contribution and silver cluster and nanoparticles stability crucially depend on chemical composition of mordenite matrix [9][10][11]. Similar dependencies were observed for copper nanoparticles supported on zeolite of different structure [12][13][14]. Varying the SiO 2 /Al 2 O 3 molar ratio (MR) influence stability of reduced nano-species of metals and their internal geometry [15][16][17][18], as well as influenced their catalytic properties [19,20].…”

Section: Introductionmentioning

confidence: 55%

Reduction of nickel ions in mordenites with different SiO<inf>2</inf>/Al<inf>2</inf>O<inf>3</inf> molar ratios

Petranovskii

Pestryakov

Herandez

et al. 2012

2012 7th International Forum on Strategic Technology (IFOST)

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The aim of present work was to study the influence of SiO 2 /Al 2 O 3 molar ratio (MR) on nickel behavior in the mordenites with wide variation of MR during reduction in hydrogen flow. It was found that during reduction treatment variation of MR in mordenite from 10 to 206 influences reducibility and mobility of reduced nickel species. Stability of the reduced samples during storage in air at ambient conditions also depends on molar ratio. Variation of MR of mordenite does not change crystal structure, but results in different ionic properties. This effect is explained by variation of acidity of zeolite matrix in line with variation of chemical composition.

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Section: Introductionmentioning

confidence: 55%

Reduction of nickel ions in mordenites with different SiO<inf>2</inf>/Al<inf>2</inf>O<inf>3</inf> molar ratios

Petranovskii

Pestryakov

Herandez

et al. 2012

2012 7th International Forum on Strategic Technology (IFOST)

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“…Additionally to supported metals mentioned above, the ion-exchange and reduction processes for Cu 2+ ions in clinoptilolite zeolite are studied at different temperatures [243]. Cu 2+ reduction by hydrogen and the formation of Cuparticles in the clinoptilolite are verified.…”

Section: + LImentioning

confidence: 99%

Synthetic Techniques and Applications of Activated Nanostructurized Metals: Highlights up to 2008

Kharissova

Kharisov²

2008

NANOTEC

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Main methods for current production of metallic nanoparticles in different forms are reviewed. Metal nanoparticles are generally synthesized in form of nanopowders, nanowires, nanoclusters, nanorods, nanobelts, and nanofilms. Bi- and trimetallic clusters and alloys are also of an interest. Examined techniques for obtaining metal nanoparticles include chemical vapor and electrochemical deposition, use of gamma-, X-ray, laser and UV-irradiation, ultrasonic and microwave treatment, electron- and ion-beams, arc discharge, decomposition and reduction of metal salts and complexes, and biosynthesis. A special attention is paid to Rieke and supported metals.

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“…3 Among the procedures applied for removing heavy metals, the ion-exchange on natural zeolites is the most advantageous from economical point of view, as showed in previous studies. [4][5][6][7][8][9][10] This method showed remarkable performances when used for removing undesirable ions from residual waters, the ion-exchange capacity being influenced both by chemical and structural properties of the zeolites (composition, porosity, pre-treating, etc.) and the exchange process parameters (ions concentration, temperature, time, etc.…”

Section: Introduction *mentioning

confidence: 99%

Mathematical modeling for kinetics of Fe3+ exchange on pretreated analcime

Cobzaru¹,

Marinoiu²,

Apostolescu³

et al. 2019

Rev.Roum.Chim.

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The kinetics of the ion-exchange process with iron on pretreated analcime has been investigated in different conditions of temperature, time and concentration of the exchange solution. The performances of the catalyst were analyzed using the Table Curve software. The mathematical model corresponding to the characteristic equation provides a good arrangement of the experimental points on the responding surface, simplicity of the characteristic equation and a good determination coefficient that is near unity.

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Exchange and reduction of Cu2+ ions in clinoptilolite

Cited by 57 publications

References 47 publications

Reduction of nickel ions in mordenites with different SiO<inf>2</inf>/Al<inf>2</inf>O<inf>3</inf> molar ratios

Reduction of nickel ions in mordenites with different SiO<inf>2</inf>/Al<inf>2</inf>O<inf>3</inf> molar ratios

Synthetic Techniques and Applications of Activated Nanostructurized Metals: Highlights up to 2008

Mathematical modeling for kinetics of Fe3+ exchange on pretreated analcime

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