Rapid iodine adsorption from vapor phase and solution by a nitrogen-rich covalent piperazine–triazine-based polymer

Huang, Yalin; Li, Wei; Xu, Yongbin; Ding, Mu; Ding, Jie; Zhang, Yun; Wang, Yuanhua; Chen, Shanyong; Jin, Yongdong; Xia, Chuanqin

doi:10.1039/d1nj00122a

Cited by 33 publications

(6 citation statements)

References 40 publications

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“…The bands at 111 and 147 cm −1 are due to the symmetric and asymmetric stretching vibrations of I 3 − , respectively, whereas the peak at 168 cm −1 is assigned to the I 5 − stretching vibration. 52,53 Both XPS and Raman spectra confirm that iodine mainly exists inside the framework in the form of polyiodide anions, indicating that electron transfer occurs between the guest iodine molecule and the electron-rich aromatic ring. Additionally, comparing FT-IR spectra of InPOP-3 and I 2 @ InPOP-3 (Fig.…”

Section: Resultsmentioning

confidence: 96%

Three novel indole-bearing porous organic polymers for efficient iodine capture from both vapor and organic phases

Yu,

Song,

Wang

et al. 2023

New J. Chem.

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Section: Resultsmentioning

confidence: 96%

Three novel indole-bearing porous organic polymers for efficient iodine capture from both vapor and organic phases

Yu,

Song,

Wang

et al. 2023

New J. Chem.

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“…[ 39 ] The CN, CN, and CCl stretching vibration peaks at around 1560, 1365, and 850 cm –1 come from the cyanuric chloride (CC), and the peak at 794 cm –1 is the characteristic breathing mode band of the triazine ring. [ 40 ] After the reaction, the CTP remained at the characteristic peaks of CH 2 , triazine ring, and CCl. While the vanishing characteristic peak (NH at 3200 cm –1 ) indicates that the terminal NH of PIP has been completely substituted by CC.…”

Section: Resultsmentioning

confidence: 99%

“…Before cycling, the N1s peak includes triazine N (397.5 eV) and piperazine N (398.6 eV). [ 40 ] After cycling, piperazine N remained in the original situation basically while triazine N shifted to a higher binding energy (399.7 eV). In addition, there is a newly arisen LiN bond at 401.3 eV, indicating that the lone‐pair electron of the triazine N transferred to Li + contributes to its strong lithiophilic character.…”

Section: Resultsmentioning

confidence: 99%

Interfacial Engineering of Binder‐Free Janus Separator with Ultra‐Thin Multifunctional Layer for Simultaneous Enhancement of Both Metallic Li Anode and Sulfur Cathode

Yao

Nie

et al. 2022

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and the undesired soluble LiPSs migrate through the porous commercial separators to the metallic Li anode, causing corrosion and passivation. [8] In terms of the metallic Li anode, the Li-dendrite growth triggered by the nonuniform Li dissolution/deposition will induce an internal short circuit. [9] To counteract these negative consequences, researchers have developed hosts for sulfur encapsulation in cathode, [10][11][12][13] lithium anode protection, [14] and separator modification to prevent lithium polysulfides (LiPSs) from shuttling. [15][16][17] Proposing a rational design strategy for simultaneous enhancement of both metallic Li anode and sulfur cathode is of great significance. The separator, one of the most indispensable components, contacts both the cathode and anode directly. It is considered to be a facile and effective approach to functionalizing separators to confine LiPSs and synchronously regulate the Li dissolution/deposition in LSBs. [18][19][20] The commercial polyolefin separator with a low melting point and nonpolar characteristics results in poor electrolyte affinity and difficulty in modification. [21,22] In addition, most of the functionalization strategies have not paid attention to the thickness and weight, which would apparently reduce the energy density of LSBs.What's worse, the stripping of the coated layer from the separator extensively exists in traditional separator modification methods, which would significantly diminish practical performance and even raise serious safety concerns about Li-metal batteries. [23,24] Especially for high energy-density batteries used in electric vehicles (Tesla, 4680), a large amount of binder (polyvinylidene fluoride; PVDF) would be coated on the separator to improve cycle stability, preventing the powder from falling off during cycling, but this is still ineffective. [25,26] Magnetron sputtering, an effective approach for fiber functionalization, could be a solution to the aforementioned issues. [27] During the sputtering process, the functional target material would deposit on the substrate in the form of atoms or molecules, enhancing the adhesion to overcome stripping defects.Meanwhile, research has demonstrated that electrospun nanofibrous separators with high porosity and polar groups were easily modified to improve the electrolyte affinity and suppress the shuttle effect of LiPSs. [28,29] Polyacrylonitrile (PAN) Exploring a scalable strategy to fabricate a multifunctional separator is of great significance to overcome the challenges of lithium polysulfides (LiPSs) and dendritic growth in lithium-sulfur batteries (LSBs). Herein, a binder-free Janus separator is constructed by interfacial engineering. At the cathode interface, an ultra-thin covalent triazine piperazine film containing tailorable micropores and adsorption sites is decorated on polyacrylonitrile (PAN) membrane by in situ interfacial polymerization, building a triple barrier for LiPSs. The combination of steric hindrance and chemical adsorption reduces LiPS's migration by 81.85%. Me...

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“…The small glass bottles were taken out, cooled down to room temperature, and weighed at regular intervals. The iodine adsorption quantity Q (g g À 1 ) was calculated using the formula (1): [31] Q ¼ q t À q 0 q 0 (1…”

Section: Iodine Adsorption and Releasementioning

confidence: 99%

Easy Fabrication of Amorphous Covalent Organic Nanospheres Using Schiff‐Base Chemistry for Iodine Capture

Sun

Zhang

Yao

et al. 2021

Chemistry An Asian Journal

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Designing a strategy for easy fabrication of amorphous porous organic polymers (POPs) with regularly nanospherical structure using common chemical raw materials is highly imperative to promote the practical application for iodine capture. Uniform covalent organic nanospheres (CONs), defined as CON-TT, were easily prepared at room temperature via a Schiff base condensation reaction of tri(4aminophenyl) methane (TAPM) and terephthalaldehyde (TPA) catalyzed by acetic acid. The obtained CON-TT exhibits a uniform nanospherical shape, high specific surface area, effective imine sorption sites and abundant benzene rings. An excellent reversible iodine adsorption capacity of 4.80 g g À 1 is achieved, which can be attributed to the hybrid of physisorption and chemisorption process. We anticipate that this work can provide general guidance for the industrial large-scale preparation of other CONs for iodine capture.

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Rapid iodine adsorption from vapor phase and solution by a nitrogen-rich covalent piperazine–triazine-based polymer

Abstract: The efficient capture of radioiodine from the waste of nuclear industries is a growing priority for the safe development of nuclear energy. However, the very slow iodine adsorption rate of...

Cited by 33 publications

References 40 publications

Three novel indole-bearing porous organic polymers for efficient iodine capture from both vapor and organic phases

Three novel indole-bearing porous organic polymers for efficient iodine capture from both vapor and organic phases

Interfacial Engineering of Binder‐Free Janus Separator with Ultra‐Thin Multifunctional Layer for Simultaneous Enhancement of Both Metallic Li Anode and Sulfur Cathode

Easy Fabrication of Amorphous Covalent Organic Nanospheres Using Schiff‐Base Chemistry for Iodine Capture

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