Adsorption of precious metal ions onto electrochemically oxidized carbon fibers

Yue, Zhongren; Jiang, Wenbo; Wang, L.; Toghiani, Hossein; Gardner, Steven D.; Pittman, Charles U.

doi:10.1016/s0008-6223(99)00041-x

Cited by 89 publications

(76 citation statements)

References 21 publications

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“…However, in the case of the CM, the amount of silver deposited is different from the amount of carboxylic groups; thus, not only carboxylic groups affect silver deposition. Another possible mechanism of silver adsorption is redox adsorption [30], which is confirmed by x-ray and SEM results. The x-ray pattern indicates that Ag + was reduced to Ag 0 crystals.…”

Section: Surface Characteristicssupporting

confidence: 52%

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Surface characteristics and antibacterial activity of a silver-doped carbon monolith

Vukčević

Kalijadis²,

Dimitrijević-Branković

et al. 2008

Science and Technology of Advanced Materials

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A carbon monolith with a silver coating was prepared and its antimicrobial behaviour in a flow system was examined. The functional groups on the surface of the carbon monolith were determined by temperature-programmed desorption and Boehm's method, and the point of zero charge was determined by mass titration. The specific surface area was examined by N 2 adsorption using the Brunauer, Emmett and Teller (BET) method. As a test for the surface activity, the deposition of silver from an aqueous solution of a silver salt was used. The morphology and structure of the silver coatings were characterized by scanning electron microscopy and x-ray diffraction. The resistance to the attrition of the silver deposited on the carbon monolith was tested. The antimicrobial activity of the carbon monolith with a silver coating was determined using standard microbiological methods. Carbon monolith samples with a silver coating showed good antimicrobial activity against Escherichia coli, Staphylococcus aureus and Candida albicans, and are therefore suitable for water purification, particularly as personal disposable water filters with a limited capacity.

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Section: Surface Characteristicssupporting

confidence: 52%

“…A possible mechanism of silver adsorption is through an ion-exchange reaction between silver ions and carboxylic groups [30]. However, in the case of the CM, the amount of silver deposited is different from the amount of carboxylic groups; thus, not only carboxylic groups affect silver deposition.…”

Section: Surface Characteristicsmentioning

confidence: 99%

Surface characteristics and antibacterial activity of a silver-doped carbon monolith

Vukčević

Kalijadis²,

Dimitrijević-Branković

et al. 2008

Science and Technology of Advanced Materials

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“…5 indicate that more oxygen-containing functional groups were generated by the HNO 3 modification, such as carboxyl and hydroxyl (phenol) functional groups. In general, carboxyl and phenol groups are hydrophilic, and these compounds may promote the adsorption of inorganic ions by an ion-exchange reaction [18,19] in electrolyte.…”

Section: Methodsmentioning

confidence: 99%

Effect of surface modification of carbon felts on capacitive deionization for desalination

Lee¹,

Ahn²,

Cho³

et al. 2015

Carbon letters

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Surface modified carbon felts were utilized as an electrode for the removal of inorganic ions from seawater. The surfaces of the carbon felts were chemically modified by alkaline and acidic solutions, respectively. The potassium hydroxide (KOH) modified carbon felt exhibited high Brunauer-Emmett-Teller (BET) surface areas and large pore volume, and oxygencontaining functional groups were increased during KOH chemical modification. However, the BET surface area significantly decreased by nitric acid (HNO 3 ) chemical modification due to severe chemical dissolution of the pore structure. The capability of electrosorption by an electrical double-layer and the efficiency of capacitive deionization (CDI) thus showed the greatest enhancement by chemical KOH modification due to the appropriate increase of carboxyl and hydroxyl functional groups and the enlargement of the specific surface area.

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“…The amount of deposited silver depends on the initial concentration of Ag + as well as the surface area, pore structure and quantity of acidic functional groups that can act as initial active sites for adsorption [4,29]. Yue et al [29] explained that there are two types of reaction that might occur during Ag + adsorption: (i) an ion-exchange reaction between silver ions and surface carboxylic groups and (ii) redox adsorption, which is confirmed by XRD. The XRD patterns indicate that some silver ions were reduced to silver crystals.…”

Section: Characterization Of Structure and Morphologymentioning

confidence: 97%

Preparation and properties of antibacterial TiO₂@C/Ag core–shell composite

Shi

Tan

Chen

et al. 2009

Science and Technology of Advanced Materials

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An environment-friendly hydrothermal method was used to prepare TiO 2 @C core-shell composite using TiO 2 as core and sucrose as carbon source. TiO 2 @C served as a support for the immobilization of Ag by impregnation in silver nitrate aqueous solution. The chemical structures and morphologies of TiO 2 @C and TiO 2 @C/Ag composite were characterized by x-ray diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy, energy dispersive x-ray spectroscopy and Brunauer-Emmett-Teller (BET) analysis. The antibacterial properties of the TiO 2 @C/Ag core-shell composite against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) were examined by the viable cell counting method. The results indicate that silver supported on the surface of TiO 2 @C shows excellent antibacterial activity.

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Adsorption of precious metal ions onto electrochemically oxidized carbon fibers

Cited by 89 publications

References 21 publications

Surface characteristics and antibacterial activity of a silver-doped carbon monolith

Surface characteristics and antibacterial activity of a silver-doped carbon monolith

Effect of surface modification of carbon felts on capacitive deionization for desalination

Preparation and properties of antibacterial TiO₂@C/Ag core–shell composite

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Adsorption of precious metal ions onto electrochemically oxidized carbon fibers

Cited by 89 publications

References 21 publications

Surface characteristics and antibacterial activity of a silver-doped carbon monolith

Surface characteristics and antibacterial activity of a silver-doped carbon monolith

Effect of surface modification of carbon felts on capacitive deionization for desalination

Preparation and properties of antibacterial TiO2@C/Ag core–shell composite

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Product

Resources

About

Preparation and properties of antibacterial TiO₂@C/Ag core–shell composite