Recovery of Metals from Electronic Waste

Nazari, Laleh; Xu, Chunbao; Ray, Madhumita B.

doi:10.1007/978-981-15-9267-6_5

Cited by 4 publications

(1 citation statement)

References 29 publications

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“…In due course, the concept of “transient electronics” emerged as an ideational response to the challenges posed by escalating nonrecyclable “electronic wastes” (i.e., discarded electronic devices) and its consequential adverse effects associated with conventional electronic device technologies. − At the end of their lifecycle, conventional electronic devices are typically consigned to landfills or subjected to chemical/combustion-based recovery processes aimed at recovering precious metals, both of which, however, introduce environmental and health concerns . Transient electronic devices share functional similarities with conventional electronics, but their certain device components with intrinsic biodegradability/compatibility allow them to disintegrate in a programmed manner, minimally releasing hazardous elements. , Furthermore, the emerging concept of transient electronics offers new opportunities for applications where conventional electronic devices fall short.…”

Section: Introductionmentioning

confidence: 99%

Calcium Alginate as an Active Device Component for Light-Triggered Degradation of 2D MoS₂-Based Transient Electronics

Kaium,

Han,

Lee

et al. 2024

ACS Appl. Mater. Interfaces

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Transient electronics technology has enabled the programmed disintegration of functional devices, paving the way for environmentally sustainable management of electronic wastes as well as facilitating the exploration of novel device concepts. While a variety of inorganic and/or organic materials have been employed as media to introduce transient characteristics in electronic devices, they have been mainly limited to function as passive device components. Herein, we report that calcium (Ca) alginate, a natural biopolymer, exhibits multifunctionalities of introducing light-triggered transient characteristics as well as constituting active components in electronic devices integrated with two-dimensional (2D) molybdenum disulfide (MoS 2 ) layers. Ca 2+ ions-based alginate electrolyte films are prepared through hydrolysis reactions and are subsequently incorporated with riboflavin, a natural photosensitizer, for the light-driven dissolution of 2D MoS 2 layers. The alginate films exhibit strain-sensitive triboelectricity, confirming the presence of abundant mobile Ca 2+ ions, which enables them to be active components of 2D MoS 2 field-effect transistors (FETs) functioning as electrolyte top-gates. The alginate-integrated 2D MoS 2 FETs display intriguing transient characteristics of spontaneous degradation upon ultraviolet-to-visible light illumination as well as water exposure. Such transient characteristics are demonstrated even in ambient conditions with natural sunlight, highlighting the versatility of the developed approach. This study emphasizes a relatively unexplored aspect of combining naturally abundant polymers with emerging near atomthickness semiconductors toward realizing unconventional and transformative device functionalities.

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Section: Introductionmentioning

confidence: 99%

Calcium Alginate as an Active Device Component for Light-Triggered Degradation of 2D MoS₂-Based Transient Electronics

Kaium,

Han,

Lee

et al. 2024

ACS Appl. Mater. Interfaces

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What happens when a Pb–Sn coating deposited on low carbon steel is exposed in an HCl‐polluted wet environment? Development of a corrosion mechanism

Lequien

Moine

Lequien

et al. 2022

Materials & Corrosion

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This article synthesizes all the results obtained to establish a global corrosion mechanism when a Pb–Sn coating deposited on low carbon steel is corroded in an HCl‐polluted wet environment. The successive stages of the process are shown. In HCl‐polluted environment, coupled with water, acid chlorides provide an aggressive electrolyte particularly favorable to corrosion. In contact with this electrolyte, lead products are created as PbCO3 and PbCl2, showing the impact of the surrounding atmosphere. In parallel, the electrolyte concentrates in Sn2+ until saturation, and tin precipitates under different forms. Due to the lead consumption, the lead corrosion products layer breaks, and the coating thins, diffusion pathways are created and the steel oxidizes. Iron corrosion products are similar with or without a coating except for the presence of a tin‐rich filament. Lead is no longer present. The different stages of the mechanism are compared to corrosion phenomena observed during the use of Pb–Sn alloys to provide effective solutions to minimize or even avoid the phenomenon of corrosion.

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Electronic Waste and Their Management Strategies

Datta

2023

Microbial Technology for Sustainable E-Waste Management

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Recovery of Metals from Electronic Waste

Cited by 4 publications

References 29 publications

Calcium Alginate as an Active Device Component for Light-Triggered Degradation of 2D MoS₂-Based Transient Electronics

Calcium Alginate as an Active Device Component for Light-Triggered Degradation of 2D MoS₂-Based Transient Electronics

What happens when a Pb–Sn coating deposited on low carbon steel is exposed in an HCl‐polluted wet environment? Development of a corrosion mechanism

Electronic Waste and Their Management Strategies

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Recovery of Metals from Electronic Waste

Cited by 4 publications

References 29 publications

Calcium Alginate as an Active Device Component for Light-Triggered Degradation of 2D MoS2-Based Transient Electronics

Calcium Alginate as an Active Device Component for Light-Triggered Degradation of 2D MoS2-Based Transient Electronics

What happens when a Pb–Sn coating deposited on low carbon steel is exposed in an HCl‐polluted wet environment? Development of a corrosion mechanism

Electronic Waste and Their Management Strategies

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Product

Resources

About

Calcium Alginate as an Active Device Component for Light-Triggered Degradation of 2D MoS₂-Based Transient Electronics

Calcium Alginate as an Active Device Component for Light-Triggered Degradation of 2D MoS₂-Based Transient Electronics