The cross‐linked hyperbranched polyamide‐amines: The preparation and its adsorption for Pb(<scp>II</scp>)

Wang, Qian; Zhu, Sining; Chen, Xi; Shen, Yongqiang; Xiang, Yanhong; Fan, Zhengxiu

doi:10.1002/app.51866

Cited by 9 publications

(4 citation statements)

References 59 publications

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“…Typically, these materials contain large amounts of functional groups that bind with soluble Pb 2+ . HBPs with Pb 2+ binding groups can be deliberately designed to act as an internal encapsulant, mitigating lead leakage and creating a safer condition for their daily use 57 .…”

Section: Introductionmentioning

confidence: 99%

Hyperbranched polymer functionalized flexible perovskite solar cells with mechanical robustness and reduced lead leakage

Li,

Jia,

Wan

et al. 2023

Nat Commun

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Perovskite solar cells (PSCs) are multilayer structures. The interface between electron transport layer and perovskite is the mechanical weakest point in flexible PSCs due to its low fracture energy. Herein, we develop a highly adhesive polyamide-amine-based hyperbranched polymers to reinforce the interface. The interface fracture energy is improved from 1.08 to 2.13 J·m−2 by the hyperbranched polymers with adhesive groups and dynamic hydrogen bond networks. The polymer functionalized perovskite solar cells achieve superior power conversion efficiencies of 25.05% and 23.86% for rigid and flexible devices, respectively. Furthermore, the hyperbranched polymer contains abundant intramolecular cavities that can capture Pb2+. Pb leakage after solar cell damage is effectively suppressed. Our findings provide insights on designing adhesive interface layers towards high-efficiency, mechanical-stable and environment-friendly flexible perovskite solar cells.

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Section: Introductionmentioning

confidence: 99%

Hyperbranched polymer functionalized flexible perovskite solar cells with mechanical robustness and reduced lead leakage

Li,

Jia,

Wan

et al. 2023

Nat Commun

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“…Compared with before adsorption, the mass percentage of residue increases after the oxidation process of Cd(II) ions at high temperatures causes adsorption. 30 The results mean that the polymer has good thermal stability and has a wider application range.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Results using the average values of three groups of parallel tests, the adsorption capacity ( q e , q t , mg·g –1 ) and removal rate ( R , %) of metal ions were determined using eqs , , and : , q t = false( C 0 − C t false) V W q e = false( C 0 − C normale false) V W R = C 0 − C e C 0 × 100 % where C 0 , C e , and C t are the concentrations (mg/L) of Cd(II) ions at initial, equilibrium, and time t , respectively. V (L) is the volume of the solution, and W (g) is the mass of the adsorbent, and q e and q t (mg/g) are the adsorption capacities at t e and t (min).…”

Section: Methodsmentioning

confidence: 99%

Preparation and Characterization of Cadmium(II)-Ion-Imprinted Composites Based on Epoxy Resin

Zhu

Chen

Zhang

et al. 2022

ACS Appl. Polym. Mater.

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In recent years, ion-imprinting technology has been frequently employed to selectively eliminate heavy metals from aqueous solutions. In this study, an environment-friendly porous cadmium-ion-imprinted composite (Cd(II)-IIP) based on epoxy resin was prepared using Cd(II) ion as a template, polyethylene glycol as a porogen, epoxy resin as the carrier, and polyethylene polyamine as complexation agent and curing agent via surface imprinting technique and stepwise polymerization process. Cd(II)-IIP was further characterized using SEM-EDS, FT-IR, TGA, and XPS, the systematic adsorption investigation of Cd(II)-IIP for the Cd(II) ions was explored. The research found that the adsorption capacity of Cd(II) got to the maximum value (q m = 64.74 mg/g) at pH = 4.0 and T = 318 K and the Cd(II)-IIP had high selectivity for Cd(II) in the presence of polymetallic ions and still has good recoverability after five cycles. The results showed that the adsorption process was closer to the pseudo-second-order kinetic model, and the isothermal curves of the experimental data were more consistent with the Langmuir adsorption model, which indicated that the whole process of adsorption was mainly monolayer chemisorption and spontaneous endothermic. In addition, the XPS and FT-IR results indicate that the interaction between Cd(II) and functional groups is related to O or N atoms on Cd(II)-IIP. In summary, Cd(II)-IIP has certain advantages and considerable development prospects for the treatment of wastewater containing Cd(II).

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“…Researchers tend to use the H-PAMAM spikes instead of polyamide-amine (PAMAM) spikes to prepare adsorbent materials . H-PAMAMs have the advantages of a low production cost and a short production cycle, making them economically suitable for large industrial applications . However, there is a non-negligible problem that they are soluble and difficult to separate when they are used directly as adsorption materials. , Therefore, researchers often fix them on various substrates to remove heavy metal ions from wastewater .…”

Section: Introductionmentioning

confidence: 99%

Adsorption and Removal of Mercury(II) by a Crosslinked Hyperbranched Polymer Modified via Sulfhydryl

et al. 2022

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In this study, the highly crosslinked hyperbranched polyamide-amines (H-PAMAMs) were first prepared via one-pot methods and then modified with thiourea to synthesize a novel adsorbent containing sulfhydryl groups (CHAP-SH), which was used to adsorb Hg(II) ions from aqueous solutions. The adsorption characteristics and mechanism of CHAP-SH for Hg(II) ions were systematically studied. As expected, CHAP-SH exhibited a rapid removal performance toward Hg(II), and the maximum adsorption capacity was 282.74 mg/g at 318 K and pH = 4.5. The whole adsorption behavior could be well described by the pseudo-second-order kinetic model and Langmuir and Redlich–Peterson adsorption isotherm models, which reflected that the adsorption process was mainly monolayer chemisorption. Meanwhile, CHAP-SH had strong selectivity for Hg(II) in the presence of multimetal ions, and it had excellent recoverability after five cycles. In order to further elucidate the adsorption mechanism, the adsorbents before and after adsorption were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, and energy-dispersive X-ray spectroscopy, and the results showed that the nitrogen-containing, oxygen-containing, and sulfur-containing groups in the adsorbent molecule had synergistic complexation with Hg(II). These results indicated that the adsorbents had great potential in the future treatment of aqueous solutions containing Hg(II).

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The cross‐linked hyperbranched polyamide‐amines: The preparation and its adsorption for Pb(II)

Cited by 9 publications

References 59 publications

Hyperbranched polymer functionalized flexible perovskite solar cells with mechanical robustness and reduced lead leakage

Hyperbranched polymer functionalized flexible perovskite solar cells with mechanical robustness and reduced lead leakage

Preparation and Characterization of Cadmium(II)-Ion-Imprinted Composites Based on Epoxy Resin

Adsorption and Removal of Mercury(II) by a Crosslinked Hyperbranched Polymer Modified via Sulfhydryl

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