Synthesis of submicron silver powder from scrap low-temperature co-fired ceramic an e-waste: Understanding the leaching kinetics and wet chemistry

Swain, Basudev; Shin, Dongyoon; Joo, So Yeong; Ahn, Nak Kyoon; Lee, Chan Gi; Yoon, Jin-Ho

doi:10.1016/j.chemosphere.2017.12.034

Cited by 13 publications

(3 citation statements)

References 20 publications

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“…Moriwaki et al utilized gold-containing electronic waste to produce gold nanoparticles [124]. Swain et al reported the use of scrap low-temperature cofired ceramic to synthesize silver metal nanopowder [125]. Shokri et al reported on the use of old PCBs to synthesize copper-tin nanoparticles [126].…”

Section: Conversion Of Waste Metals Directly To Nanomaterialsmentioning

confidence: 99%

Status of Recovery of Strategic Metals from Spent Secondary Products

et al. 2021

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The need to drive towards sustainable metal resource recovery from end-of-cycle products cannot be overstated. This review attempts to investigate progress in the development of recycling strategies for the recovery of strategic metals, such as precious metals and base metals, from catalytic converters, e-waste, and batteries. Several methods for the recovery of metal resources have been explored for these waste streams, such as pyrometallurgy, hydrometallurgy, and biohydrometallurgy. The results are discussed, and the efficiency of the processes and the chemistry involved are detailed. The conversion of metal waste to high-value nanomaterials is also presented. Process flow diagrams are also presented, where possible, to represent simplified process steps. Despite concerns about environmental effects from processing the metal waste streams, the gains for driving towards a circular economy of these waste streams are enormous. Therefore, the development of greener processes is recommended. In addition, countries need to manage their metal waste streams appropriately and ensure that this becomes part of the formal economic activity and, therefore, becomes regulated.

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Section: Conversion Of Waste Metals Directly To Nanomaterialsmentioning

confidence: 99%

Status of Recovery of Strategic Metals from Spent Secondary Products

et al. 2021

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“…To recycle silicon derived from DWSSP, increasing the yield of high-purity silicon is an imperative issue that needs to be resolved . The metallurgical route has become a popular method for silicon purification due to its low cost and environmental friendliness associated with its sustainable process. , As leaching is the primary and essential stage for the recovery of metals in comparison with pyrometallurgical treatments, , the metallic impurities present in DWSSP could be removed with a cost-effective compatible acid leaching pretreatment process. Since 2019, several methods have been presented for the purification and recovery of silicon from DWSSP.…”

Section: Introductionmentioning

confidence: 99%

Occurrence State and Dissolution Mechanism of Metallic Impurities in Diamond Wire Saw Silicon Powder

Yang

Wan

Wei

et al. 2020

ACS Sustainable Chem. Eng.

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The facilitation of metallic impurities removal via acid leaching pretreatment plays a key role in silicon recovery from diamond wire saw silicon powder (DWSSP) waste. Disappointingly, the occurrence state and dissolution mechanism of the metallic impurities present in DWSSP have not yet been revealed. For this reason, in this study, three different kinds of raw DWSSP were used for acid leaching tests and leaching behavior verification to investigate the dissolution mechanism. After two-stage acid leaching with 4 M HCl and 2 M HCl + 2.5 M HF, the results indicate that the removal efficiency was superior to that of other previously reported leaching processes. Furthermore, two occurrence states of metallic impurities present in DWSSP were defined based on their different dissolution behaviors, and the intrinsic relationship between dissolution behavior and the thinning process of the amorphous SiO2 shell was derived. The findings indicate that the first type of impurity was more easily dissolved in HCl solution; however, the second type of retained metallic impurity was restricted by the SiO2 shell barrier and was removed by the added HF solution. For this reason, the disintegration dissolution of the amorphous SiO2 shell was found to have a significant impact on the facilitation of the removal of impurities retained in DWSSP. The findings of this study are significant for the recovery of silicon from DWSSP with an effective acid leaching flow design.

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“…The relatively large electropositive reduction potential for silver determines the usage of reductant required for a successful N chemical process. Among reducing agents, commonly used inorganic compounds are hydrazine, [18] sodium borohydride [19] and trisodium citrate. [20] Organic reductants are often multifunctional, because they can behave as carrier media, [21] surfactants, [22,23] or both.…”

Section: Introductionmentioning

confidence: 99%

Impact of Weak Organic Acids on Precipitation of Poly(acrylic acid) Stabilized Silver Nanoparticles; an Electrochemical Approach

Ivanišević¹,

Rukavina²,

Kassal³

et al. 2018

Croat. Chem. Acta

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Owing to recent developments in the field of silver nanoparticle (AgNP) based conductive inks for inkjet printing, there is a growing demand for implementation of novel synthetic routes. This study presents a synthesis of silver colloid with an average particle diameter of less than 3 nm. AgNPs were obtained by a chemical reduction method, using hydrazine as a reducing agent, and poly(acrylic acid), (PAA), as a grainstabilizing agent. Synthesis was provided using highly concentrated aqueous solutions. To obtain PAA-coated silver nanopowder, weak organic acids were introduced as precipitation agents. The main goal of this work was to study the impact of various organic precipitants on nanosurface-adsorbed polyacid for enhanced ink stability, by implementing electrochemical techniques. Cyclic voltammetry and electrochemical impedance spectroscopy were the main methods in describing all steps of the procedure -from preliminary experiments to whole system characterization. For a comprehensive study of the nanoink suspension, dynamic light scattering (DLS) and electrokinetic potential measurements were carried out. The obtained results show, through a very apparent decrement in anodic current responses, the influence of different organic acid precipitants on nanoink destabilization.

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Synthesis of submicron silver powder from scrap low-temperature co-fired ceramic an e-waste: Understanding the leaching kinetics and wet chemistry

Cited by 13 publications

References 20 publications

Status of Recovery of Strategic Metals from Spent Secondary Products

Status of Recovery of Strategic Metals from Spent Secondary Products

Occurrence State and Dissolution Mechanism of Metallic Impurities in Diamond Wire Saw Silicon Powder

Impact of Weak Organic Acids on Precipitation of Poly(acrylic acid) Stabilized Silver Nanoparticles; an Electrochemical Approach

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