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Journal articles on the topic 'Copper and silver cation exchange'

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Published: 10 December 2022

Last updated: 28 January 2023

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1

Zhang, Xiaoxia, Zhenlan Xu, Andreas Wimmer, Hangjun Zhang, Jiaojiao Wang, Qibei Bao, Zhouhang Gu, Mei Zhu, Lixi Zeng, and Lingxiangyu Li. "Mechanism for sulfidation of silver nanoparticles by copper sulfide in water under aerobic conditions." Environmental Science: Nano 5, no. 12 (2018): 2819–29. http://dx.doi.org/10.1039/c8en00651b.

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2

Chen, Nan, Michael R. Scimeca, Shlok J. Paul, Shihab B. Hafiz, Ze Yang, Xiangyu Liu, Fan Yang, Dong-Kyun Ko, and Ayaskanta Sahu. "High-performance thermoelectric silver selenide thin films cation exchanged from a copper selenide template." Nanoscale Advances 2, no. 1 (2020): 368–76. http://dx.doi.org/10.1039/c9na00605b.

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3

Prieto-Blanco, Xesús, and Carlos Montero-Orille. "Theoretical Modelling of Ion Exchange Processes in Glass: Advances and Challenges." Applied Sciences 11, no. 11 (May 30, 2021): 5070. http://dx.doi.org/10.3390/app11115070.

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In the last few years, some advances have been made in the theoretical modelling of ion exchange processes in glass. On the one hand, the equations that describe the evolution of the cation concentration were rewritten in a more rigorous manner. This was made into two theoretical frameworks. In the first one, the self-diffusion coefficients were assumed to be constant, whereas, in the second one, a more realistic cation behaviour was considered by taking into account the so-called mixed ion effect. Along with these equations, the boundary conditions for the usual ion exchange processes from molten salts, silver and copper films and metallic cathodes were accordingly established. On the other hand, the modelling of some ion exchange processes that have attracted a great deal of attention in recent years, including glass poling, electro-diffusion of multivalent metals and the formation/dissolution of silver nanoparticles, has been addressed. In such processes, the usual approximations that are made in ion exchange modelling are not always valid. An overview of the progress made and the remaining challenges in the modelling of these unique processes is provided at the end of this review.

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4

Concepcion-Rosabal, Beatriz, Arbelio Penton-Madrigal, Inocente Rodriguez-Iznaga, Ernesto Estevez-Rams, and Vitalii Petranovskii. "Reduction of Cu2+in exchanged Ag+natural clinoptilolite: structural study." Acta Crystallographica Section A Foundations and Advances 70, a1 (August 5, 2014): C1765. http://dx.doi.org/10.1107/s2053273314082345.

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Modified zeolites with cations, clusters and metallic nanoparticles are of interest due to the possibility to develop materials with new properties [1]. A study concerning the thermal reduction under hydrogen flow of mixed bimetallic system Cu2+ and Ag+ exchanged natural clinoptilolite Tasajeras deposit, Cuba is presented. The influence of silver in the reduction of Cu2+ was studied. X-Ray diffraction experiments on natural clinoptilolite, as well as on ion-exchanged monometallic and bimetallic samples were performed. The peak intensities of the exchanged samples, are changed as a result of the ion exchange, and they are fundamentally associated with differences in nature, amount and position of the extra-framework ions in the channels of the natural zeolites [2, 3]. The fig 1 shows the magnitude of the Fourier Transform (FT) for the EXAFS signals of the natural clinoptilolite exchanged with Cu2+ and of the natural clinoptilolite exchanged with both Cu2+ and Ag+ and reduced at 150 oC . The TF of the experimental EXAFS signal of metallic Cu, has been also added. The amplitude of the peak at 1.82 Å, associated with the coordination of Cu2+ with 4 oxygen atoms, decreases upon Cu was added. A detailed analysis of the graph reveals also that for the exchanged and reduced samples a peak at 2.58 Å begins to emerge. This maximum coincides with the first maximum of the metallic Cu and may be associated with the formation of small clusters of Cu. The addition of Ag+ favors the decrease of the reduction temperature of Cu2+. The reduction of Cu2+ and Ag+ cations shows existence of notable interinfluence between both cations during this process. The Cu2+ reduction is favored by the presence of Ag+. The aggregation of the reduced highly dispersed species both for copper and silver is limited in this bimetallic system. The introduction of Ag+ as the second cation in the copper exchanged zeolites appears to be an efficient tool for the control of the size of the resultant reduced nanoparticles.

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5

Kaali, Péter, and György Czél. "Single, Binary and Ternary Ion Exchanged Zeolite as an Effective Bioactive Filler for Biomedical Polymer Composites." Materials Science Forum 729 (November 2012): 234–39. http://dx.doi.org/10.4028/www.scientific.net/msf.729.234.

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The preparation and modelling of single, binary and ternary ion exchanged zeolites that express antimicrobial efficiency is discussed. As experimental material A type zeolite was used and different variations of Ag, Cu and Zn ions were incorporated into the crystal structure. Antimicrobial efficiency is based on the ion concentration and ion release of the zeolite, therefore the maximum cation-exchange capacities (CEC) were determined for each of the single ions. After the determination of CEC the preparation of binary and ternary ion-exchanged zeolite samples were prepared by the mixture of silver, copper and zinc nitrate solutions and the composition of the samples was determined by atomic absorption spectroscopy (AAS). To verify the bioactive effect, the minimum inhibitory concentration (MIC) of single, binary and ternary ion-exchanged zeolite A was determined for bacteria strains.

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6

Sayee Kannan, R., S. Siva, K. Kavitha, and N. Kannan. "Phenol and Formaldehyde Cationic Resin Blended with Sulphonated Aegle Marmelos Charcoal." Materials Science Forum 699 (September 2011): 281–91. http://dx.doi.org/10.4028/www.scientific.net/msf.699.281.

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This paper represents a simple method for preparing and characterizing of low-cost ion exchangers of sulfonated carbon prepared from Aegle Marmelos., as a source of cheap plant material blended with phenol-formaldehyde as a cross linking agent. The prepared ion exchange resins (IERS) are characterized by infrared (IR) spectral and thermal studies. All the important physico chemical properties of the ion exchangers have been determined. It is concluded from the present study that PER sample could be blended with 30% (W/W) of sulfonated Aegle Marmelos charcoal (SAMC) without affecting its physico chemical, spectral and thermal properties. Hence blending with SAMC will be finitely lower the cost of the ion exchange resin. Ion exchange process is suitable in the treatment of waste water containing metal ions discharge from plating and other industries. Also, it is a convenient way to concentrate and remove the ions of valuable metals like copper, mercury, cadmium, Nickel and Barium special processes using selective IERS are also available for the recovery of precisious noble metals like gold, platinum and silver. The present study is aimed at to synthesize and characterize new composite ion exchangers of PhOH – HCHO type, blended with SAMC and to determine the column/cation exchange capacity (or) ion exchange capacity (IEC) for some selective metal ions.

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7

Noori, Farzaneh, Meriem Megoura, Marc-André Labelle, Mircea Alexandru Mateescu, and Abdelkrim Azzouz. "Synthesis of Metal-Loaded Carboxylated Biopolymers with Antibacterial Activity through Metal Subnanoparticle Incorporation." Antibiotics 11, no. 4 (March 24, 2022): 439. http://dx.doi.org/10.3390/antibiotics11040439.

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Carboxymethyl starch (CMS) and carboxymethyl cellulose (CMC) loaded by highly dispersed metal subnanoparticles (MSNPs) showed antibacterial activity against E. coli and B. subtilis strains. Copper and silver were found to act in both cationic and zero-valence forms. The antibacterial activity depends on the metal species content but only up to a certain level. Silver cation (Ag+) showed higher antibacterial activity as compared to Ag0, which was, however, more effective than Cu0, due to weaker retention. The number of carboxyl groups of the biopolymers was found to govern the material dispersion in aqueous media, the metal retention strength and dispersion in the host-matrices. Cation and metal retention in both biopolymers was found to involve interactions with the oxygen atoms of both hydroxyl and carboxyl groups. There exists a ternary interdependence between the Zeta potential (ZP), pH induced by the biocidal agent and its particle size (PS). This interdependence is a key factor in the exchange processes with the surrounding species, including bacteria. Clay mineral incorporation was found to mitigate material dispersion, due to detrimental competitive clay:polymer interaction. This knowledge advancement opens promising prospects for manufacturing metal-loaded materials for biomedical applications.

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8

WANG, Xiu, Pingyue HU, Zhipeng WANG, Qiuyun LIU, Ting XU, Mengqian KOU, Ke HUANG, and Piaopiao CHEN. "A Fluorescence Strategy for Silver Ion Assay via Cation Exchange Reaction and Formation of Poly(thymine)-templated Copper Nanoclusters." Analytical Sciences 35, no. 8 (August 10, 2019): 917–22. http://dx.doi.org/10.2116/analsci.19p036.

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9

Das, Malay Kanti, S. Chattopadhayay, B. R. Sarkar, and N. Ramamoorthy. "A cation exchange method for separation of 111In from inactive silver, copper, traces of iron and radioactive gallium and zinc isotopes." Applied Radiation and Isotopes 48, no. 1 (January 1997): 11–14. http://dx.doi.org/10.1016/s0969-8043(96)00123-6.

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10

Banakh, O. S., R. I. Baranskyi, V. J. Rogovyk, and I. M. Zybak. "Modified Zeolites in Gas Chromatography for the Analysis of Air Pollutants." Adsorption Science & Technology 14, no. 4 (August 1996): 209–16. http://dx.doi.org/10.1177/026361749601400401.

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Based on zeolites of types X, Y and M, with and without binding clay, ion-exchange modifications containing alkali and alkaline earth cations (silver and copper) and different quantities of water have been prepared. Data obtained with these zeolites have enabled their retention volumes and selectivities towards low boiling hydrocarbons and oxide gases to be calculated. Sharp changes were observed in these parameters when the chromatography of ethane and other gases was conducted on such zeolites with up to 10% K+, Rb+ and Cs+ cations replaced, i.e. when low replacement of exchangable cations had been effected. The same effect was encountered with CO and olefins when 0.08CuNaY zeolite was employed. An increase in temperature and the introduction of water into the system caused a decrease in the effect. These observations have prove useful in the construction of chromatographic columns and adsorption filters for the extraction and concentration of certain pollutants.

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11

Tait, B. "Two-phase potentiometric metal extraction titrations of silver(I), copper(II) and cadmium(II) using some cation-exchangers as extractants." Talanta 42, no. 1 (January 1995): 137–42. http://dx.doi.org/10.1016/0039-9140(94)00229-l.

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12

Kolesnikov, Alexander V., and Egor I. Ageenko. "Discharge of hydronium ions on metal cathodes in the presence of pyridine." Butlerov Communications 63, no. 8 (August 31, 2020): 58–63. http://dx.doi.org/10.37952/roi-jbc-01/20-63-8-58.

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In this work, studies have been carried out on the electrochemical reduction of hydrogen (hydronium ion) from acidic aqueous solutions in the presence of an organic substance – pyridine. Electrolysis was carried out in an electrolyte with a sulfuric acid content (0.18; 0.36 M) with a pyridine additions of 8.4·10-3 M. Potentiostatic studies were carried out on a Potentiostat P-30Jcom Elins potentiostat using a three-electrode cell. Working electrodes (cathodes) were made of M1 copper with an area (S) of 0.09 cm2; aluminum (AD1) S – 0.125 cm2, zinc (Ts0A) S – 0.35 cm2, lead (Cl) S – 0.20 cm2, auxiliary (anode) – from a platinum plate with an area of 0.20 cm2, reference electrode – silver chloride (AgCl/Ag). In potentiometric measurements, the results are presented according to the average data obtained for 30 s of electrolysis in the potential range (-950 ÷ -1100 mV for AgCl/Ag), and in studies in the galvanostatic mode at current densities from 0 to 110 mV/cm2, the results are presented as average data, obtained in the initial 5 s of the process. The paper presents comparative data on the electrokinetic parameters studied under the same conditions of hydrogen discharge reactions at different cathodes in electrolytes with a sulfuric acid content of 0.36 M. It is shown that the highest discharge current density of the hydronium ion (Н3О+) is achieved at the copper electrode, and the lowest at the lead electrode. With the addition of 8.4∙10-3 M pyridine to the electrolyte, the reduction of hydrogen cations is somewhat reduced on the electrodes used, except for lead. The transfer coefficients of the hydrogen discharge at all electrodes are low, and with the addition of pyridine they decrease even more. The low transfer coefficients indicate that the process of the hydronium ion discharge proceeds in a non-activation mode. The lowest exchange current is recorded at the copper and lead electrode. At the zinc electrode, the exchange of current is one to two orders of magnitude higher than at the other electrodes, so it can be noted that at this electrode the system under consideration is closer to the equilibrium of state. The order of the reaction of the course of electrolysis by the hydronium cation on the copper, aluminum and zinc electrodes is close to unity. The addition of pyridine leads to a slight decrease in the order of the reaction. This is due to the fact that pyridine molecules in acidic solutions exist in the form of pyridinium ion, which is reduced at the cathode. In this case, a significant amount of hydrogen is absorbed, which should explain the decrease in the order of the reaction with respect to the hydronium ion in the presence of pyridine additives. The obtained low values of the transfer coefficients indicate that, during the discharge of hydronium ions, the process is limited to a greater extent by the concentration polarization. The diffusion nature of the reduction of hydronium ions in electrolytes with a sulfuric acid concentration of 0.18 and 0.36 M is also evidenced by data taken in a dynamic mode.

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13

Morales, Libby, and M. Inés Toral. "Simultaneous Determination of Cu(II) and Ag(I) on SP Sephadex C25 as Complexes with 1-Phenyl-1,2-Propanedione-2-Oximethiosemicarbazone by Derivative Spectrophotometry." Journal of AOAC INTERNATIONAL 90, no. 6 (November 1, 2007): 1695–700. http://dx.doi.org/10.1093/jaoac/90.6.1695.

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Abstract The proposed method was based on retention and preconcentration of the complexes Cu(II)PPDOT and Ag(I)PPDOT on a solid phase in acid medium. The complexes were quantitatively retained in the cation exchanger SP Sephadex C25, and the analytical measurements were executed directly in the solid phase by derivative spectrophotometry. In this simultaneous determination, the second derivative and the zero crossing method were used. The determination of copper and silver was carried out to 321.0 and 427.0 nm, respectively. In order to obtain quantitative recoveries of the metal ions, various experimental analytical parameters, such as pH, stirring time, volume, and amount of solid phase, were optimized. The effect of interfering ions on the determination was described. The recovery values for Cu(II) and Ag(I) were found to be >98, and the relative standard deviation was 2. The detection limits (3 criterion) for Cu(II) and Ag(I) were found to be 0.9 108 and 13 108 M, respectively. The developed method was utilized for preconcentration and determination of Cu(II) and Ag(I) in industrial effluents and natural water samples. The results were consistent with those provided by inductively coupled plasma/mass spectrometry.

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14

Kolesnikov, Alexander V., and Egor I. Ageenko. "The effect of pyridine on the electrochemical parameters of the hydroxonium discharge at the copper cathode." Butlerov Communications 60, no. 12 (December 31, 2019): 62–69. http://dx.doi.org/10.37952/roi-jbc-01/19-60-12-62.

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In this work, we studied the electrochemical reduction of hydrogen (hydroxonium ion) from acidic aqueous solutions in the presence of a surface active substance – pyridine. H2SO4 (r.h.) was used as a reagent to study the discharge of hydroxonium cations. The effect of pyridine on the reduction of hydrogen cations was carried out in solutions of sulfuric acid (0.09; 0.18; 0.36 M) with pyridine additives from 1.4·10-3 to 8.4·10-3 M. Potentiostatic studies were performed on a Potentiostat P-30Jcom Elins using a three-electrode cell. The working electrode (cathode) was made of M1 grade copper with an area of 0.09 cm2; auxiliary (anode) – from a platinum plate with an area of 0.20 cm2, the reference electrode is silver chloride (AgCl/Ag). The results are presented according to the average data obtained during 30 s of electrolysis in the potential region (-950-1100 mV for AgCl/Ag), with potentiometric measurements. The results are presented by the average data obtained in the initial 5 s of the process, in studies in the galvanostatic mode at current densities from 0 to 110 mV/cm2. An increase in the constant current of load almost to a small extent influenced the change in overvoltage with time, as shown by galvanostatic studies. Overvoltage, on average, decreased from 3-6 to 1-2 mV in the first 5 seconds of the beginning of the process, during the study with or without pyridine. Overvoltage ceased to depend after 10-15 s on the time of galvanostation. The effect of the addition of pyridine to the electrolyte was studied and it was shown that the negative effect of pyridine on the discharge of the hydroxonium ion increases with increasing acidity of the electrolyte. An increase in the density of exchange currents with a decrease in the content of sulfuric acid in the electrolyte is noted, which is associated with the approach of the electrode system to the equilibrium state. The decrease in the transfer coefficients of the hydrogen discharge reaction with an increase in the acid of content in the electrolyte and pyridine additives was explained by the distant position of the transition state localization from the electrode surface. The calculations of the reaction order for the hydroxonium ion in the presence and absence of pyridine in the electrolyte are presented. The obtained value of the reaction order, taking into account standard errors close to unity, allows us to conclude that at the initial stage, the hydroxonium of molecule is discharged, the products of which are atomic hydrogen, the HSO4 anion and water. In the kinetics of the process of the discharge of hydrogen cations, the stages can further play an important role: surface diffusion of hydrogen ad-atoms, formation of gas bubbles and their desorption, adsorption of hydrogen by metal.

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15

Voloshyna, Yu G., and O. P. Pertko. "Side-chain Alkylation of Toluene with Methanol, Modification and Deactivation of Zeolite Catalysts of the Reaction." Catalysis and Petrochemistry, no. 31 (2021): 17–40. http://dx.doi.org/10.15407/kataliz2021.31.017.

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The review deals with main aspects of the toluene methylation reaction on basic catalysts. The side reactions of decomposition of methanol to CO and H2 on strong basic sites and ring alkylation of toluene on Lewis acid sites (cations of high polarizing ability) hinder obtaining high yields of the target products – styrene and ethylbenzene. Both types of sites are necessary for the course of the target reaction. So optimizing their strength and quantity is an important prerequisite for the selectivity of the side-chain alkylation catalysts. The advantage of fojasite-based systems for this reaction was confirmed by the works of many researchers. However, the possibilities of use of zeolites of other structural types and representatives of a new generation of molecular sieves are being studied, as well as ways of modifying such materials to increase their catalytic efficiency. The main direction of modification is to regulate the balance of acidity and basicity. Effective charge of framework oxygen atoms, which determines basicity of zeolite framework, increases due to the introduction of guest compounds into the catalyst, and this effect is more significant than influence on basicity of ion exchange for cations of elements of low electronegativity. However, the role of this method of modifying in increasing the selectivity remains crucial due to potentiality to decrease the Lewis acidity of cations. Compounds of other elements and transition metals also are used for modification, as well as promotion with metallic copper and silver. Techniques are applied, but not widely, to deprive the external surface of crystallites of active sites. This method of modification is effective for slowing down their deactivation by coke. Acid sites, in particular BAS, are most often distinguished among the sites responsible for coke formation. The mechanism of coke formation in the absence of such centers is also proposed. On the whole, this issue not fully disclosed and requires a deeper study.

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16

Thellier, Catherine, and Garrison Sposito. "Quaternary Cation Exchange on Silver Hill Illite." Soil Science Society of America Journal 52, no. 4 (July 1988): 979–85. http://dx.doi.org/10.2136/sssaj1988.03615995005200040015x.

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17

Shin, Kyeong Sook Kim, James D. Barrie, Bruce Dunn, and Jeffrey I. Zink. "Optical spectroscopy of copper cation/silver cation doped .beta.''-alumina." Journal of the American Chemical Society 112, no. 15 (July 1990): 5701–6. http://dx.doi.org/10.1021/ja00171a004.

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18

Ocanto, Freddy, Carlos F. Linares, Edith Figueredo, and Caribay Urbina de Navarro. "Antibacterial property of cancrinite-type zeolites exchanged with silver and copper cations." Revista Tecnica De La Facultad De Ingenieria Universidad Del Zulia 42, no. 3 (August 2019): 143–51. http://dx.doi.org/10.22209/rt.v42n3a06.

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19

Shankar, Krapa, Babulal Das, and Jubaraj B. Baruah. "Cation Exchange in Layered Copper(II) Coordination Polymers." European Journal of Inorganic Chemistry 2013, no. 36 (November 19, 2013): 6147–55. http://dx.doi.org/10.1002/ejic.201300906.

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20

Sharipova, U., Kh Pulatov, R. Nazirova, and B. Kedel’baev. "PHYSICO-CHEMICAL PROPERTIES OF PHOSPHATE CATION-EXCHANGE RESIN." Technical science and innovation 2019, no. 4 (December 12, 2019): 94–99. http://dx.doi.org/10.51346/tstu-01.19.4.-77-0043.

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There are investigated sorption and desorption characteristics of phosphate cation-exchange resin among metals: copper, nickel, cobalt, an uranyl-ion depending on pH-environment, the ionic form of cation-exchange resin, concentration of investigated cations. Interaction of cation-exchange resin in Na- and H-forms with solutions of salts sulphate of copper, nickel, cobalt, chloride sodium, calcium and nitrate of uranyl is studied. It is shown, that ions of copper, nickel, cobalt and an uranyl-ion by phosphate cation-exchange resin sorb at the expense of an ionic exchange and partially at the expense of formation of coordination communications with ionogenic group of cation-exchange resin. A study of the sorption of uranyl ions depending on the concentration of uranyl nitrate in the range of 0.01-0.1 N showed that with an increase in the concentration of uranyl in the studied interval, the value of sorption of uranyl increases slightly. The studied phosphate cation exchanger has a sufficiently high sorption and desorption ability to the ions of the tested metals.

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21

Macdonald, Thomas J., Yatin J. Mange, Melissa Dewi, Aoife McFadden, William M. Skinner, and Thomas Nann. "Cation exchange of aqueous CuInS2 quantum dots." CrystEngComm 16, no. 40 (2014): 9455–60. http://dx.doi.org/10.1039/c4ce00545g.

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Chalcopyrite copper indium disulfide (CIS) QDs have been of recent interest due to their non-toxicity. This article shows a straightforward aqueous cation exchange method to synthesise CIS particles with zinc sulfide coating.

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22

Lesnyak, Vladimir, Chandramohan George, Alessandro Genovese, Mirko Prato, Alberto Casu, S. Ayyappan, Alice Scarpellini, and Liberato Manna. "Alloyed Copper Chalcogenide Nanoplatelets via Partial Cation Exchange Reactions." ACS Nano 8, no. 8 (July 28, 2014): 8407–18. http://dx.doi.org/10.1021/nn502906z.

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23

Bull, Patrick S., and John V. Evans. "Cation exchange removal of copper from aqueous ammonia solutions." Journal of Applied Chemistry and Biotechnology 23, no. 12 (April 25, 2007): 919–24. http://dx.doi.org/10.1002/jctb.5020231210.

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24

Kumar, Rakesh, Ashok K. Pandey, Sadananda Das, Sangita Dhara, N. L. Misra, R. Shukla, A. K. Tyagi, Shobha V. Ramagiri, Jayesh R. Bellare, and A. Goswami. "Galvanic reactions involving silver nanoparticles embedded in cation-exchange membrane." Chemical Communications 46, no. 34 (2010): 6371. http://dx.doi.org/10.1039/c0cc00825g.

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Dohrmann, R. "Cation exchange capacity methodology II: A modified silver–thiourea method." Applied Clay Science 34, no. 1-4 (October 2006): 38–46. http://dx.doi.org/10.1016/j.clay.2006.02.009.

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26

Turabdzhanov, Sadritdin, Zulkaynar Nazirov, Dildora Turaeva, and Latofatkhon Rakhimova. "Perspective Wastewater Treatment from Cu2+ Ions in the Mining Industry." E3S Web of Conferences 105 (2019): 02025. http://dx.doi.org/10.1051/e3sconf/201910502025.

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The synthesis of new cation-exchanger based on local raw materials for the extraction of copper from copper-containing solution investigated. A review of the literature regarding the problem of ion exchange method and the use of mine wastewater treatment process is presented. Sorption selectivity of Cu2+ ions by cation exchanger in the H-and Na-forms from dilute solutions was studied in the target concentration range 90 mg/dm3 and 5,49 g/ dm3. The full dynamic exchange capacity calculated. The cation exchanger analyzed with consideration for IR spectroscopic, chemical analysis, and scanning electron microscopic data. Quantum-chemical calculations performed that synthesized cation-exchanger stable complexes with Cu2+ ions. Obtained cation exchanger due to excellent behavior recommended removing copper ions from wastewater in the mine industry.

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27

Lesnyak, Vladimir, Rosaria Brescia, Gabriele C. Messina, and Liberato Manna. "Cu Vacancies Boost Cation Exchange Reactions in Copper Selenide Nanocrystals." Journal of the American Chemical Society 137, no. 29 (July 20, 2015): 9315–23. http://dx.doi.org/10.1021/jacs.5b03868.

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28

Manzi, Aurora, Thomas Simon, Clemens Sonnleitner, Markus Döblinger, Regina Wyrwich, Omar Stern, Jacek K. Stolarczyk, and Jochen Feldmann. "Light-Induced Cation Exchange for Copper Sulfide Based CO2 Reduction." Journal of the American Chemical Society 137, no. 44 (October 29, 2015): 14007–10. http://dx.doi.org/10.1021/jacs.5b06778.

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29

Kura, Genichiro, and Hirohiko Waki. "Cation-exchange and spectrophotometric study of copper(II)-cyclopolyphosphate complexes." Polyhedron 9, no. 4 (January 1990): 511–16. http://dx.doi.org/10.1016/s0277-5387(00)86227-0.

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30

Wolf, Andreas, Torben Kodanek, and Dirk Dorfs. "Tuning the LSPR in copper chalcogenide nanoparticles by cation intercalation, cation exchange and metal growth." Nanoscale 7, no. 46 (2015): 19519–27. http://dx.doi.org/10.1039/c5nr05425g.

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31

Dong, Kaituo, Qiu-Cheng Chen, Zheng Xing, Yuexing Chen, Yuanshen Qi, Nicholas G. Pavlpoulos, and Lilac Amirav. "Silver Tipping of CdSe@CdS Nanorods: How To Avoid Cation Exchange." Chemistry of Materials 33, no. 16 (August 6, 2021): 6394–402. http://dx.doi.org/10.1021/acs.chemmater.1c01598.

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32

Ruhmlieb, Charlotte, Angelique Rieckmann, Christian Strelow, Tobias Kipp, and Alf Mews. "Fabrication of Ag2S/CdS Heterostructured Nanosheets via Self-Limited Cation Exchange." Zeitschrift für Physikalische Chemie 232, no. 9-11 (August 28, 2018): 1295–305. http://dx.doi.org/10.1515/zpch-2018-1191.

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Abstract Highly crystalline vertically aligned Ag2S/CdS heterostructured nanosheets with lateral sizes of several micrometers and thicknesses of a few nanometers are prepared directly on silver surfaces by a two-step process. Firstly, Ag2S sheets were prepared by direct reaction of partially dissolved elementary sulfur in methanol with a solid silver surface in methanol at room temperature. The second step involves a self-limited cation exchange of Ag+ vs. Cd2+ to achieve the formation of large-area Ag2S/CdS heteronanosheets on the solid substrate. The cation exchange was proven and investigated over time via several analytical methods, e.g. X-ray diffraction, Raman spectroscopy and three-dimensional photoluminescence mapping.

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33

Staccioli, Giuseppe, Alberto Sturaro, and Rocco Rella. "Cation Exchange Capacity Tests on Some Lignocellulosic Materials Highlight Some Aspects of the Use of Copper as Wood Preservative." Holzforschung 54, no. 2 (February 29, 2000): 133–36. http://dx.doi.org/10.1515/hf.2000.023.

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Summary The stoichiometric validity of copper(II) salts in the assessing the cation exchange capacity of lignocellulosic materials with respect to sodium salts is determined on some materials like Populus euramericana, Pinus pinea, flax, hemp, cotton, and some of their derivatives. Copper exhibits the usual stoichiometry (bivalence) with saponified woods and Norman & Jenkins holocelluloses whereas it is present as bivalent and/or apparent monovalent ions in the other materials. The major groups responsible for cation exchange are the carboxyls of polyoses while hydroxyls seem inert at this reaction. Cation exchange of wood and raw fibers is, on the contrary, influenced by the structure of lignin. In fact, when it forms ester bonds with polyoses it causes the rising of copper apparently working as monovalent species. Lacking these bonds, lignin does not provoke any chemical interactions except for some isolated lignins. These data show that copper interacts mainly with polyoses, secondly with lignin if bonded to polyoses whereas cellulose seems to be weakly involved in these interactions. To improve the assumption of copper from preservative formulations mild saponification of woods is suggested since such treatment enhances the number of sites of exchange in polyoses.

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34

Dierks, S. "Investigation of copper adsorption to peat using the simple metal sorption model." Water Science and Technology 44, no. 11-12 (December 1, 2001): 477–83. http://dx.doi.org/10.2166/wst.2001.0869.

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The Simple Metal Sorption (SiMS) equilibrium model was used to simulate the proton/cation exchange behavior of peat with dissolved copper. The SiMS model represents proton binding and metal binding as cation exchange for heterogeneous sorbents as a function of pH, salt concentration, total metal concentration and total ligand concentration. The SiMS model uses fewer parameters than other cation exchange models for multidimensional datasets and can be executed on a standard spreadsheet. The cation exchange selectivity coefficient, KMe,app, is represented as KMe,app=KMe{H+}α(LT/MeT)βIphiv. The model is similar to standard surface complexation approaches, with an intrinsic relationship described by mass action laws (KMe=metal equilibrium constant) and variable terms that are expressed as simple power functions of proton concentration, ligand to metal ratio (LT/MeT), and ionic strength (I). The model successfully simulated the proton exchange behavior of acid-washed, Sphagnum peats over a range of 4 to 8 pH units with ionic strength differing by three orders of magnitude (I=0.001 to 0.1). Simulation of copper binding on five peat data sets and the dried biomass of Potamogeton lucens was also successful (0.94<r2<0.99). However, there was no apparent relationship between model parameters and peat characteristics. Incorporation of the SiMS model into a framework for predicting metals removals in wetlands will require more work.

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35

Hong, Yongju, Taekyung Kim, Jinhyoung Jo, Byeongyoon Kim, Haneul Jin, Hionsuck Baik, and Kwangyeol Lee. "Highly Crystalline Hollow Toroidal Copper Phosphosulfide via Anion Exchange: A Versatile Cation Exchange Nanoplatform." ACS Nano 14, no. 9 (July 6, 2020): 11205–14. http://dx.doi.org/10.1021/acsnano.0c02891.

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36

ITAGAKI, Masayuki, Yuka NARUI, Kenta KOJIMA, Yoshinao HOSHI, Isao SHITANDA, Hiroshi YANAGIMOTO, Motoki HIRAOKA, and Hirofumi IISAKA. "Mechanisms of Solid Electrolyte Deposition of Copper Using Cation Exchange Membrane." Journal of The Surface Finishing Society of Japan 70, no. 1 (January 1, 2019): 40–44. http://dx.doi.org/10.4139/sfj.70.40.

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37

Jameson, Alexander, Ali Khazaeli, and Dominik P. J. Barz. "A rechargeable zinc copper battery using a selective cation exchange membrane." Journal of Power Sources 453 (March 2020): 227873. http://dx.doi.org/10.1016/j.jpowsour.2020.227873.

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38

Edebali, Serpil, and Erol Pehlivan. "Evaluation of chelate and cation exchange resins to remove copper ions." Powder Technology 301 (November 2016): 520–25. http://dx.doi.org/10.1016/j.powtec.2016.06.011.

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39

Thellier, Catherine, and Garrison Sposito. "Influence of Electrolyte Concentration on Quaternary Cation Exchange by Silver Hill Illite." Soil Science Society of America Journal 53, no. 3 (May 1989): 705–11. http://dx.doi.org/10.2136/sssaj1989.03615995005300030010x.

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40

Thellier, Catherine, and Garrison Sposito. "Influence of Electrolyte Concentration on Quaternary Cation Exchange by Silver Hill Illite." Soil Science Society of America Journal 53, no. 3 (May 1989): NP. http://dx.doi.org/10.2136/sssaj1989.03615995005300030065x.

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41

Thellier, Catherine, Garrison Sposito, and Kenneth M. Holtzclaw. "Proton Effects on Quaternary Cation Exchange and Flocculation of Silver Hill Illite." Soil Science Society of America Journal 56, no. 2 (March 1992): 427–33. http://dx.doi.org/10.2136/sssaj1992.03615995005600020014x.

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42

Baker, M. D., C. Senaratne, and J. Zhang. "silver zeolite-modified electrodes: importance of ion-exchange and cation site effects." Journal of Physical Chemistry 98, no. 6 (February 1994): 1668–73. http://dx.doi.org/10.1021/j100057a021.

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43

Xu, Wei, Jagadese J. Vittal, and Richard J. Puddephatt. "Anionic Calixarene Complexes of Copper(I) and Silver(I) as Cation Receptors." Inorganic Chemistry 36, no. 1 (January 1997): 86–94. http://dx.doi.org/10.1021/ic960508w.

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HIRAYAMA, Naoki, Satoshi MORIYAMA, and Takaharu HONJO. "Non-suppressed Ion Chromatography of Copper (II) Cation Using Thiacalix[4]arene as Cation-exchange Group." Journal of Ion Exchange 14, Supplement (2003): 309–12. http://dx.doi.org/10.5182/jaie.14.supplement_309.

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45

Siva, S., S. Sudharsan, and R. Sayee Kannan. "Selective Co(ii) removal from aqueous media by immobilizing silver nanoparticles within a polymer-matrix through a formaldehyde cross linking agent." RSC Advances 5, no. 30 (2015): 23340–49. http://dx.doi.org/10.1039/c4ra15510f.

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46

Fujii, Y., M. Hosoe, and M. Okamoto. "Copper Isotope Separation by Ion Exchange Electromigration and Copper Isotope Analysis by Thermo-Ionization Mass Spectrometry." Zeitschrift für Naturforschung A 41, no. 5 (May 1, 1986): 769–70. http://dx.doi.org/10.1515/zna-1986-0515.

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The separation coefficient of copper isotopes, 63Cu and 65Cu, in the electromigration process through cation exchange m em brane was experimentally determined as 3.2 x l0- 4. The appropriate heating condition of low ionizing filament current for thermo-ionization mass spectrometry was developed and this method was applied to the copper isotope analysis in the present work.

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47

Guldiren, Duygu, and Süheyla Aydın. "Antimicrobial property of silver, silver-zinc and silver-copper incorporated soda lime glass prepared by ion exchange." Materials Science and Engineering: C 78 (September 2017): 826–32. http://dx.doi.org/10.1016/j.msec.2017.04.134.

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48

Xing, Wei, Man Lee, and Seung Choi. "Separation of Ag(I) by Ion Exchange and Cementation from a Raffinate Containing Ag(I), Ni(II) and Zn(II) and Traces of Cu(II) and Sn(II)." Processes 6, no. 8 (August 1, 2018): 112. http://dx.doi.org/10.3390/pr6080112.

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Ion exchange and cementation experiments were done to separate silver(I) from a raffinate containing silver(I), nickel(II), and zinc(II) and small amounts of copper(II) and tin(II). The raffinate resulted from the recovery of gold(III), tin(II) and copper(II) by solvent extraction from a leaching solution of anode slime. Ion exchange with anionic resins was not effective in separating silver(I) because tin(II) and zinc(II) were selectively adsorbed into the anionic resins. It was possible to separate silver(I) by cementation with copper sheet. Treatment of the cemented silver with nitric acid solution increased the purity of silver(I) in the solution from 50.9% to 99.99%. Adjusting the pH of the AgNO3 solution to higher than 6, followed by adding ascorbic acid as a reducing agent, led to the synthesis of silver particles with micron size.

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49

Huang, Ke, Kailai Xu, Jie Tang, Lu Yang, Jingrong Zhou, Xiandeng Hou, and Chengbin Zheng. "Room Temperature Cation Exchange Reaction in Nanocrystals for Ultrasensitive Speciation Analysis of Silver Ions and Silver Nanoparticles." Analytical Chemistry 87, no. 13 (June 10, 2015): 6584–91. http://dx.doi.org/10.1021/acs.analchem.5b00511.

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50

Ammann, L., F. Bergaya, and G. Lagaly. "Determination of the cation exchange capacity of clays with copper complexes revisited." Clay Minerals 40, no. 4 (December 2005): 441–53. http://dx.doi.org/10.1180/0009855054040182.

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AbstractThe determination of the cation exchange capacity (CEC) of clays by exchange with the cationic copper complexes [Cu(en)2]2+ and [Cu(trien)]2+ is revisited. The procedures reported by Bergaya & Vayer (1997) and Meier & Kahr (1999) are modified slightly. The concentration of the copper complexes in the equilibrium solutions is measured by spectral photometry. Correct CEC values of the [Cu(en)2]2+ exchange are only obtained when a buffer (‘tris’, tris (hydroxymethyl) aminomethane, pH = 8) is added to the equilibrium solution after separation of the clay, because the molar extinction coefficient of this complex depends on the pH of the solution. A standard procedure is recommended as a reference method. In most cases, tris addition is not needed for the determination with [Cu(trien)]2+ cations. Nevertheless, tris addition is recommended in the standard procedure. Determination of CEC for 40 samples (kaolins, ‘common clays’, bentonites, montmorillonites and beidellite) shows a good agreement between measurements using [Cu(en)2]2+ and [Cu(trien)]2+ cations and with results by the ammonium acetate method.

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