Arginine and lysine-functionalized layered double hydroxides as efficient sorbents for radioactive Co2+ removal by chelate-facilitated immobilization

Koilraj, Paulmanickam; Kalusulingam, Rajathsing; Sasaki, Keiko

doi:10.1016/j.cej.2019.05.166

Cited by 37 publications

(11 citation statements)

References 47 publications

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“…Nevertheless, the yields of their carbonization method relied heavily on the amino acid types, and the lysine-derived carbon only delivers a carbon yield of around 5%. Nevertheless, the lysine polymer derivative, such as linear α-poly( l -lysine), has received tremendous attention because of its multiple conformational changes, such as random-coil, α-helix, and β-sheet architecture. − However, on account of the small molecular size and harsh polymerization condition for lysine to form the stable carbonization counterpart, lysine-based precursor as an eligible carbon resource has been rarely utilized to fabricate nitrogen-doped porous carbons with high carbonization yield successfully and ample loading of nitrogen atoms. Recently, we found that the renewable biomass branched poly( l -lysine) (BPL) could interact compactly with silica via in situ thermal polymerization strategy due to hydrogen bonding, electrostatic force, and interfacial interaction.…”

Section: Introductionmentioning

confidence: 99%

Branched Poly(l-lysine)-Derived Nitrogen-Containing Porous Carbon Flake as the Metal-Free Electrocatalyst toward Efficient Oxygen Reduction Reaction

Min

Koh

et al. 2021

ACS Appl. Energy Mater.

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Amino acids are recently being regarded as highly attractive candidates to fabricate thoroughly metal-free and rich nitrogen-containing mesoporous carbons. Nevertheless, the carbonization yield of the lysine is usually just around 5% due to the small molecular size and harsh polymerization condition for lysine to form the stable carbonization counterpart. Renewable biomass branched poly(l-lysine) (BPL) is hereby exploited to synthesize nitrogen-containing porous carbon flake (NPCF). Notably, the fabrication process is essentially an in situ thermal polymerization and pyrolysis with mesoporous silica template strategy, which avoids the usage of metal catalysts. Indeed, a metal-free mesoporous carbon with a high carbon yield of 20.1% and improved nitrogen-doping content of up to 9.6 at. % is achieved. As a result, the as-prepared NPCFs serve as metal-free electrocatalysts toward the efficient oxygen reduction reaction (ORR). In particular, one of the samples (NPCF-700/900) exhibits highly efficient ORR performance of oxygen-reduction voltage at 0.809 V in cyclic voltammogram measurement, onset peak at 0.93 V, and semi wave peak of 0.83 V in rotating disk electrode linear sweep voltammetry curves. The associated kinetic-limiting and diffusion-limiting current densities are 18.4 and −4.89 mA cm–2, respectively. This can be attributed to the abundance of nitrogen dopant of 8.3 at. % in a high graphitization carbon framework that possesses a large specific surface area (1431 m2 g–1). More importantly, NPCF-700/900 delivers excellent cycle stability and endurance with regards to methanol permeation and CO poisoning, making it a hopeful metal-free ORR electrocatalyst superior to that of the Pt/C in basic conditions.

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Section: Introductionmentioning

confidence: 99%

Branched Poly(l-lysine)-Derived Nitrogen-Containing Porous Carbon Flake as the Metal-Free Electrocatalyst toward Efficient Oxygen Reduction Reaction

Min

Koh

et al. 2021

ACS Appl. Energy Mater.

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“…adsorbent, etc.) to remove metal contaminants [28,33,[35][36][37][38][39][40][41]. For example, Fe 3 O 4 NPs modified with arginine and lysine were synthesized and showed promising efficiency in the removal of arsenic from model water system.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, the high costs involved correlated to adsorbent removal and the inconvenience of industrialization hinder the selection of an optimal choice. Indeed, an important but often overlooked fact is that many reports using lysine-based adsorbent [28,33,[35][36][37][38][39][40][41] focus only on single metal removal from model solutions mostly with not permanently bonded lysine and do not investigate adsorption in real and complex systems, which is crucial for commercial purposes.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, it has been shown that amino acids are good chelating agents for metal removal from aqueous environments. The functionalization of amino acids on a good solid surface is strongly recommended to achieve high efficiency together with stability [ 33 ]. In fact, amino acids contain some reactive groups such as carboxylate and amine groups, which are able to form stable chelates with various heavy metals and so far these biomolecules have been little researched in the field of heavy metal remediation [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

“…Fe 3 O 4 -(GO-MWCNTs) hybrid magnetic composites, graphene oxide, crosslinked chitosan resin, clay materials, cellulose adsorbent, etc.) to remove metal contaminants [ 28 , 33 , 35–41 ]. For example, Fe 3 O 4 NPs modified with arginine and lysine were synthesized and showed promising efficiency in the removal of arsenic from model water system.…”

Section: Introductionmentioning

confidence: 99%

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Magnetic nanostructures functionalized with a derived lysine coating applied to simultaneously remove heavy metal pollutants from environmental systems

Plohl

Simonič

Kolar

et al. 2021

Science and Technology of Advanced Materials

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The pollution of environmental systems with heavy metals is becoming a serious problem worldwide. These contaminants are one of the main issues in sludge (which is considered waste) and can even have harmful effects if the sludge is not treated properly. Thus, the development of a novel functional magnetic nanoadsorbent based on a derived lysine is reported here, which can be efficiently applied for metal removal from sludge. Magnetic nanoparticles were coated with silica layer and further modified by covalent bonding of derived lysine. The morphology of the nanomaterial, its nano-size and the silica layer thickness were analyzed by transmission electron microscopy. The successful silanization of the lysine derivative to the silica-coated magnetic nanostructures was investigated by several physicochemical characterization techniques, while the magnetic properties were measured with a vibrating sample magnetometer. The synthesized nanostructures were used as adsorbents for simultaneous removal of most critical heavy metals (Cr, Zn, Cu) from real complex sludge suspensions. The main practical adsorption parameters, pH of the native stabilized sludge, adsorbent amount, time, and adsorbent regeneration were investigated. The results show promising adsorption properties among currently available adsorbents (the total equilibrium adsorption capacity was 24.5 mg/g) from the sludge with satisfactory nanoadsorbent reusability and its rapid removal. The stability of the nanoadsorbent in the sludge, an important but often neglected practical parameter for efficient removal, was verified. This work opens up new possibilities for the development of high-quality magnetic nanoadsorbents for metal pollutants applied in various complicated environmental fields and enables waste recovery.

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Carbon Dot‐Layered Double Hydroxide Nanocomposite with Dual‐Mode Emission for Anti‐Fake Application

et al. 2022

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There is an urgent need to develop a safe, unclonable comprehensive anti‐counterfeiting technology. The novel organic‐inorganic nanocomposite material CD‐LDH uses fluorescence and phosphorescence to achieve double verification. It is made into luminous ink to write anti‐fake marks of important documents. There is no obvious trace under the fluorescent lamp, while blue light emission under the ultraviolet lamp, and a long afterglow of 5 s after the ultraviolet lamp is turned off. The material can be widely used in the fields of information transmission and anti‐fake.

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Arginine and lysine-functionalized layered double hydroxides as efficient sorbents for radioactive Co2+ removal by chelate-facilitated immobilization

Cited by 37 publications

References 47 publications

Branched Poly(l-lysine)-Derived Nitrogen-Containing Porous Carbon Flake as the Metal-Free Electrocatalyst toward Efficient Oxygen Reduction Reaction

Branched Poly(l-lysine)-Derived Nitrogen-Containing Porous Carbon Flake as the Metal-Free Electrocatalyst toward Efficient Oxygen Reduction Reaction

Magnetic nanostructures functionalized with a derived lysine coating applied to simultaneously remove heavy metal pollutants from environmental systems

Carbon Dot‐Layered Double Hydroxide Nanocomposite with Dual‐Mode Emission for Anti‐Fake Application

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