Electrochemical reduction of different Ag(<scp>i</scp>)-containing solutions in bioelectrochemical systems for recovery of silver and simultaneous power generation

Ho, Ngo Anh Dao; Babel, Sandhya

doi:10.1039/c9ra06369b

Cited by 11 publications

(6 citation statements)

References 31 publications

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“…Nuclei are formed from the reduction of the [Ag(NH 3 ) 2 ] + complex according to Reaction IV because the reduction potential of surface-bound aldehyde, E 0 ≈ −0.2 V (vs. standard hydrogen electrode (SHE)) [ 48 ], is lower compared to E 0 ([Ag(NH 3 ) 2 ] + ) = +0.373 V (vs. SHE) [ 49 ]. Formation of AgNPs on the polyHIPE pore surface according to the above mechanism requires the introduction of aldehyde groups on polyHIPE as well as reaction conditions avoiding the presence of any insoluble Ag 2 O nanoparticles.…”

Section: Resultsmentioning

confidence: 99%

Flow-Through PolyHIPE Silver-Based Catalytic Reactor

et al. 2021

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Catalytic reactors performing continuously are an important step towards more efficient and controllable processes compared to the batch operation mode. For this purpose, homogenous high internal phase emulsion polymer materials with an immobilized silver catalyst were prepared and used as a continuous plug flow reactor. Porous material with epoxide groups was functionalized to bear aldehyde groups which were used to reduce silver ions using Tollens reagent. Investigation of various parameters revealed that the mass of deposited silver depends on the aldehyde concentration as well as the composition of Tollens reagent. Nanoparticles formed on the pore surface showed high crystallinity with a cuboctahedra crystal shape and highly uniform surface coverage. The example of the 4-nitrophenol catalytic reduction in a continuous process was studied and demonstrated to be dependent on the mass of deposited silver. Furthermore, productivity increased with the volumetric silver density and flow rate, and it was preserved during prolonged usage and storage.

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Section: Resultsmentioning

confidence: 99%

Flow-Through PolyHIPE Silver-Based Catalytic Reactor

et al. 2021

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“…Reduction of silver diamine ions follows the scheme shown in eq . It is reported that the reduction of silver diamine complex ions results in the formation of pure silver metal at the cathode, typically in the form of dendrites false[ normalA normalg false( normalN normalH 3 false) 2 false] false( normala normalq false) + + normale − → normalA normalg false( normals false) 0 + 2 normalN normalH 3 ( l ) …”

Section: Silver Electrodeposition Solutionsmentioning

confidence: 99%

“…20 Reduction of silver diamine ions follows the scheme shown in eq 2. 21 It is reported that the reduction of silver diamine complex ions results in the formation of pure silver metal at the cathode, typically in the form of dendrites. 21 Due to the hydrophobic character of PDMS, surface modification is needed to facilitate effective spreading of the electrodeposition solution across the PDMS template to fill the channels.…”

Section: Silver-ammonia Complexesmentioning

confidence: 99%

“…21 It is reported that the reduction of silver diamine complex ions results in the formation of pure silver metal at the cathode, typically in the form of dendrites. 21 Due to the hydrophobic character of PDMS, surface modification is needed to facilitate effective spreading of the electrodeposition solution across the PDMS template to fill the channels. 7 Poly(vinyl alcohol) (PVA) is added to the electrodeposition solution to provide the template with the necessary hydrophilicity.…”

Section: Silver-ammonia Complexesmentioning

confidence: 99%

Section: Silver Electrodeposition Solutionsmentioning

confidence: 99%

See 2 more Smart Citations

Qualitative Nanocharacterization of Silver Structures Synthesized from the Reduction of Complex Ions in Polymer Templates: An Inquiry-Based Introduction to Conductive Atomic Force Microscopy

et al. 2023

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This manuscript describes a laboratory exercise that allows students to use conductive atomic force microscopy (CAFM) for the analysis of electrodeposited, metallic structures. In addition to nanoscale electrical characterization with CAFM, this laboratory exercise also provides students with an opportunity to explore nanofabrication by electrodepositing metallic structures in the channels of a patterned, polydimethylsiloxane (PDMS) template. The goals of this experiment include characterization of electrodeposited structures with atomic force microscopy (AFM), assessing the conductivity of the electrodeposited structures by acquiring conductivity images, and determining the method of electrical conduction using current–voltage (I–V) curves collected with CAFM.

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Integration of Bioleaching and Biorefinery Technologies for the Recovery of Base and Critical Elements from Electronic Waste

Kompalitch,

van Hullebusch

2024

Advances in Science, Technology &Amp; Innovation

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Electrochemical reduction of different Ag(i)-containing solutions in bioelectrochemical systems for recovery of silver and simultaneous power generation

Abstract: Different Ag(i) solutions can be successfully reduced electrochemically to form Ag0 deposits with dendritic and cubic structure at the cathode surface.

Cited by 11 publications

References 31 publications

Flow-Through PolyHIPE Silver-Based Catalytic Reactor

Flow-Through PolyHIPE Silver-Based Catalytic Reactor

Qualitative Nanocharacterization of Silver Structures Synthesized from the Reduction of Complex Ions in Polymer Templates: An Inquiry-Based Introduction to Conductive Atomic Force Microscopy

Integration of Bioleaching and Biorefinery Technologies for the Recovery of Base and Critical Elements from Electronic Waste

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