Highly cost-efficient sorption and desorption of mercury ions onto regenerable poly(m-phenylenediamine) microspheres with many active groups

Li, Xin‐Gui; Huang, Mei‐Rong; Tao, Tao; Ren, Zhonghua; Zeng, Jie; Yu, Jie; Umeyama, Tomokazu; Ohara, Tomoya; Imahori, Hiroshi

doi:10.1016/j.cej.2019.123515

Cited by 31 publications

(19 citation statements)

References 114 publications

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“…In the infrared spectrum of SiO 2 @PmPD, the absorption peak at 1105 cm −1 was the anti‐symmetric stretching vibration of Si−O−Si, and the absorption peak at 951 cm −1 was the symmetrical stretching vibration of Si−O [7] . The peak at 619 cm −1 could be attributed to the interposition substitution of benzene ring [5] . However, in the hollow PmPD, the characteristic peaks at 1105 cm −1 and 951 cm −1 obviously weakened or disappeared, indicating that the core (SiO 2 ) of SiO 2 @PmPD was almost completely etched after HF treatment.…”

Section: Resultsmentioning

confidence: 96%

“…Meanwhile, compared with the infrared spectrum of hollow PmPD in the original state, the absorption peak intensity of the hollow PmPD loaded with Au(III) at 3424, 3182, and 1400 cm −1 significantly increased, thereby proving from the side that the −NH− group plays a role in the adsorption process (Figure 14). [5] …”

Section: Resultsmentioning

confidence: 99%

“…In addition, under acidic conditions, the −N= in PmPD is protonated, and the posotively charged −N= + can also attract AuCl 4 − . Second, the −NH− group on the hollow PmPD has reducibility, which can reduce the Au(III) on the hollow PmPD to Au 0 , while −NH− is oxidized to −N= (the valence state of N changes from −3 to −2) [5,26] . Third, hollow PmPD combines with Au(III) through chemical coordination.…”

Section: Resultsmentioning

confidence: 99%

“…[6] Similarly, Huang et al used PmPD to remove Hg 2 + from a solution. [5] However, the use of PmPD to treat Au(III)-containing solution has not been explored in the literature.…”

Section: Introductionmentioning

confidence: 99%

“…[4c] Polyaniline compounds are often used to treat heavy metal ion wastewater due to their structural diversity, acid resistance, alkali resistance, strong redox, and complexing of heavy metal ions.The amino group on polyphenylenediamine (PmPD) is reducing and can restore high potential metal ion. [5] In addition, the nitrogen atom on the amino group can also act as coordination atoms to provide the binding of solitary pair electrons to heavy metal ions with an empty orbit (d or hybrid orbitals). Wang et al used a bacterial cellulose/polymphenylene diamine (BC/PmPD) hybrid adsorbent to remove Cr(VI) from an aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

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Rapid Reduction and Recovery of Au(III) in Water by Hollow Polym‐phenylenediamine Nanospheres

et al. 2022

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To quickly and efficiently recover precious metal gold from electronic waste products, we synthesized a novel hollow polym‐phenylenediamine (PmPD) nanosphere using the sacrificial template method and applied this materials to reduce and recover Au(III) in an aqueous solution. Experimental results show that the as‐prepared hollow PmPD has high selectivity and treatment capacity for Au(III), and can selectively reduce Au(III) from mixture metals solutions, including Cu2+, Zn2+, Ni2+, Cd2+, and Au(III) mixed solutions. Under room temperature and solution pH 4.0, the maximum treatment capacity of hollow PmPD for Au(III) reaches 1185.18 mg/g in 10 min of equilibrium time. The reduction ability of hollow PmPD remains stable in a pH range of 1.0 to 10.0 and under an ambient temperature ranging from 0 °C to 50 °C. Hollow PmPD can be regenerated via simple NaHSO3 solution washing, and its performance remains stable after repeated recycling. The satisfactory results obtained in treating the computer CPU leaching solution suggest that the hollow PmPD has broad application prospects in recovering gold from e‐waste.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…[6] Similarly, Huang et al used PmPD to remove Hg 2 + from a solution. [5] However, the use of PmPD to treat Au(III)-containing solution has not been explored in the literature.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rapid Reduction and Recovery of Au(III) in Water by Hollow Polym‐phenylenediamine Nanospheres

et al. 2022

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Modulating the Macroscopic Helicity of Poly(m‐phenylenediamine) by Achiral Monomer Copolymerization

Zha

Xiong

et al. 2022

Adv Funct Materials

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Designing artificial systems to mimic chiral superstructures and exploring how achiral molecules precisely modulate their chirality is crucial to understand the origin of homochirality in nature. Herein, the tunability nature of supramolecular chirality is subtly applied to fabricate robust chiral covalent polymers with controlled macroscopic helicity. When using conventional supramolecular transcription methods to prepare chiral poly(m-phenylenediamine), simply introducing various small amounts of achiral diaminopyridines (DAPs) to copolymerize with m-phenylenediamine (MPD) enables the resulting chiral copolymers with adjustable helical configurations and chiroptical activities in an enantiopure template system. The strong hydrogen bonds between DAPs and the template molecules ((S)/(R)-PhgC 16 ) proved to be the driving force for guiding the chiral polymerization mode of MPD. Impressively, the exquisite self-sorting phenomenon is observed by tuning the stoichiometric ratio of DAP and (R)-PhgC 16 , where the as-prepared copolymers with opposite helicity can exist simultaneously to form a double network structure and their chiroptical activity can be well regulated. In addition, based on such a copolymerization strategy, a conceptual library of helical functional copolymers is built with editable polymer types including conducting polymers and designable amine-aldehyde condensation-based polymers. This copolymerization-mediated synthetic strategy may facilitate the development of chiral polymers with controlled morphologies and dynamic compositions.

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Scalable Fabrication of Lightweight, Heat‐Resistant, and Controllable Sizes Polyimide Hollow Microspheres

Meng,

Ni,

Zhou

et al. 2023

Macro Chemistry & Physics

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Polyimide hollow microspheres (PIHMs) possess lightweight and excellent thermal resistance, making them highly valuable for various applications in aerospace, catalysis and irradiation. Co‐polymerized PIHMs (PIHMBMDs) were fabricated through powder foaming combined with a gradient heating strategy in this work. The diameter of PIHMBMDs ranged from 364 to 1230 µm, which could be designed by regulating the size of polyester ammonium salts (PEASs). The PIHMBMDs possessed intact morphology with a breakage rate of 3∼10% and low bulk density with a density ranging from 28.3 to 62.9 kg m−3. Furthermore, PIHMBMDs exhibited excellent thermal properties with a 5% weight loss temperature and glass transition temperature of 525.0 and 282.5 °C respectively, making it an ideal material for fabricating lightweight and high‐temperature‐resistant multifunctional composites. Moreover, the proposed method is simple, efficient and easily scalable, which is suitable for industrial applications to manufacture large quantities of PIHMs.This article is protected by copyright. All rights reserved

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Highly cost-efficient sorption and desorption of mercury ions onto regenerable poly(m-phenylenediamine) microspheres with many active groups

Cited by 31 publications

References 114 publications

Rapid Reduction and Recovery of Au(III) in Water by Hollow Polym‐phenylenediamine Nanospheres

Rapid Reduction and Recovery of Au(III) in Water by Hollow Polym‐phenylenediamine Nanospheres

Modulating the Macroscopic Helicity of Poly(m‐phenylenediamine) by Achiral Monomer Copolymerization

Scalable Fabrication of Lightweight, Heat‐Resistant, and Controllable Sizes Polyimide Hollow Microspheres

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