Journal of Energy Storage
·
2024
·
IF 8.9
Jiaqi Sun,Zuoshu Wang,Jie Zhang,Dewei Wang
Aqueous zinc‑iodine batteries are favorable solutions for grid-level energy storage owing to their cost-effective components and intrinsic safety. Nevertheless, the sluggish conversion kinetics and polyiodide shuttle effect have significantly hindered their practical applications. Herein, a Co single atom anchored on N-doped porous carbon nanosheets (Co-SAs@NPC) was produced through an efficient molten-salt engaged pyrolysis process and further utilized as the iodine host for aqueous zinc-iodine batteries. The large specific surface area (1741 m 2 g −1 ) combined with abundant heteroatom-containing functional groups can afford a tight physical and chemical confinement towards iodine species. Meanwhile, the presence of Co single atoms exhibits high electrocatalytic activity towards I 2 reduction reactions. According to the experimental results and DFT theoretical calculations, the resulting Co-SAs@NPC can simultaneously offer generous electrochemical active sites and electrocatalytic activity, which displays a high adsorption ability towards iodide species and boost the reversible redox reactions between iodine and iodides. Consequently, the as-assembled zinc-iodine batteries with Co-SAs@NPC/I 2 cathodes can deliver a high specific capacity (295 mA h g −1 at 0.3 A g −1 ), good rate performance (199 mAh g −1 at 20 A g −1 ), and long cyclic stability over 10,000 cycles. Additionally, the absence of polyiodide shuttle was analyzed by a series of ex-situ spectrum analyses.
研究领域:
材料科学
·
能源存储与转换
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Lijun Tang,Jian Gao,Tong Shen,Yubing Sun,Xiangyu Wang,Yongchao Zhang,Tiansheng Mu,Xiaodong Zhu
High energy density, intrinsic safety, and eco-friendliness of aqueous zinc‑iodine (Zn I 2 ) batteries are hindered by the shuttle effect and sluggish iodine redox kinetics. These limitations result in the formation of highly soluble triiodide ( I 3 − ) intermediates, which adversely affect energy density and cycle life. To address these issues, we designed N, O co-doped porous carbon with interconnected microchannels (N/O-PC) to create abundant catalytic sites and a locally strong adsorption microenvironment for the iodine reduction reaction (IRR). The unique structure of N/O-PC facilitates electrolyte penetration and enhances iodine fixation and loading, effectively inhibiting the formation and shuttling of I 3 − . Leveraging this favorable microenvironment, the battery exhibits exceptional cycling stability with a high capacitance retention rate after 65,000 cycles at 10 A g −1 . In situ characterization and theoretical calculations confirm that N/O dopants serve as active centers promoting the chemical immobilization and catalytic conversion of polyiodides. This work integrates physical adsorption and catalytic conversion to construct a host material, offering a novel strategy for developing a powerful Zn I 2 batteries.
研究领域:
材料科学
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电化学
·
能源存储
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DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2025
·
IF 8.4
Xiao-Jun Dai,Yi-Ting Chen,Wen-Ge Zhang,Shu-Xuan Li,Wen-Rui Zhang,Xiang-Hua Qi,Chun-Hui Gong,Peng Wang,Man-Li He,Yi Yang
Radioactive iodine (I 2 ) is a potential risk to environmental safety and human health. The design of efficient and stable functional materials for I 2 capture remains a challenge. In this work, a simple in-situ impregnation method is used to load Ionic Liquid (IL)-[C 2 mim][Tf 2 N] into the pores of MOF-808, named IL@MOF. IL@MOF exhibit excellent I 2 removal performance (2.61 g/g), which is 1.75 and 21.75 times higher than that of MOF-808 and [C 2 mim][Tf 2 N], respectively. This is attributed to the excellent pore structure of MOF-808 and the abundant heteroatom adsorption sites of IL. After modification with hydrophobic IL, IL@MOF exhibit good adsorption performance in high humidity environment. I 2 is retained within IL@MOF in the forms of I 3 − (85 %) and I 2 (15 %). The formation of I 3 − is attributed to charge transfer between the unsaturated site, the heteroatom (N, O, S, F) adsorption site and I 2 within IL@MOF. In addition, the adsorption sites on the IL@MOF surface and adsorption energy are investigated by Density Functional Theory (DFT). Finally, this study provides ideas and guidance for designing MOF-based composites for the effective immobilization of radioiodine.
研究领域:
环境科学
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材料科学
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核工程
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化学工程
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物理化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Qianxi Wang,Yang Tao,Ziyi Li,Wenyou Ye,Yuanjing Wang,Dawei Liu,Yi He
Covalent organic frameworks (COFs) are important porous adsorbents for volatile iodine (I 2 ) and methyl iodide (CH 3 I). In situ monitoring of the dynamic adsorption process of single COF crystals toward I 2 and CH 3 I is a critical and fundamental issue for understanding the reaction mechanism and improving the sorption performance. Here, we report operando real-time dark-field optical microscopy (DFM) imaging of visually studying the dynamic adsorption behavior of LZU-111 (LZU=Lanzhou University) COFs in the I 2 /CH 3 I binary gaseous mixture at the single-crystal level. Time-lapse imaging shows that the uptake of CH 3 I and I 2 results in the R intensity increase and B intensity decrease of the DFM images. Employing the R and B intensities as two indicators, we find an unusual blinking of R/B intensities from single LZU-111 crystals, which is attributed to the intermittent sorption-desorption processes of CH 3 I and I 2 within the LZU-111 framework. The visualization of the dynamic reaction process provides clear evidence that the competitive adsorption between CH 3 I and I 2 goes through a multi-time and oscillatory reaction pathway instead of a successive procedure. Combined with theoretical calculations, the difference in the migration capability and initial pressure is identified for initiating the intermittent blinking events.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2023
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IF 3.9
Jiaxin Cao,Siyihan Duan,Qian Zhao,Guangyuan Chen,Zeru Wang,Ruixi Liu,Lin Zhu,Tao Duan
The effective capture and deposition of radioactive iodine in the spent fuel reprocessing process is of great importance for nuclear safety and environmental protection. Three-dimensional (3D) fiber felt with structural diversity and tunability is applied as an efficient adsorbent with easy separation for iodine capture. Here, a bismuth-based silica aerogel fiber felt (Bi@SNF) was synthesized using a facile hydrothermal method. Abundant and homogeneous Bi nanoparticles greatly enhanced the adsorption and immobilization of iodine. Notably, Bi@SNF demonstrated a high capture capacity of 982.9 mg/g by forming stable BiI3 and Bi5O7I phases, which was about 14 times higher than that of the unloaded material. Fast uptake kinetics and excellent resistance to nitric acid and radiation were exhibited as a result of the 3D porous interconnected network and silica aerogel fiber substrate. Adjustable size and easy separation and recovery give the material potential as a radioactive iodine gas capture material.
研究领域:
核能与辐射安全
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2012
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IF 4.531
Zhongping Huang,Zuoyi Zhu,Qamar Subhani,Wenwu Yan,Weiqiang Guo,Yan Zhu
A simple ion chromatographic method for simultaneous detection of iodide and iodate in a single running was proposed, with columns packed with homemade functionalized polystyrene-divinylbenzene (PS-DVB) resins and column-switching technique. Homemade resins were functionalized with controllable amounts of quaternary ammonium groups. The low-capacity anion-exchange column and high-capacity anion-exchange column were prepared, due to the resins having different exchange capacities. With this method, iodide and iodate in povidone iodine solution were detected simultaneously in a short time with iodide being eluted off first. A series of standard solutions consisting of target anions of various concentrations from 0.01 mg/L to 100 mg/L were analyzed. Each anion exhibited satisfactory linearity, with correlation coefficient r ≥ 0.9990. The detection limits (LODs) for iodide and iodate obtained by injecting 100 μL of sample were 5.66 and 14.83 μg/L (S/N = 3), respectively. A spiking study was performed with satisfactory recoveries between 101.2% and 100.6% for iodide and iodate.
研究领域:
分析化学
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医学检测
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2019
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IF 7.65
Zijun Dong,Chengchun Jiang,Jingxin Yang,Xi Zhang,Weili Dai,Pengwei Cai
This work investigates the transformation of iodide (I − ) by Fe(II)-activated peroxydisulfate (PDS). The transformation of I − into iodate (IO 3 − ) is a two-step process, involving reactive iodine species, such as hypoiodous acid (HOI), as a key intermediate, and IO 3 − as the final product. In the first step, SO 4 •- produced by Fe(II)-activated PDS is mainly responsible for the transformation of I − into HOI. In the second step, Fe(IV) formed by the reaction of Fe(III) with PDS is required, to facilitate the further oxidation of HOI to IO 3 − . The disproportionation of HOI and the oxidation by PDS alone contribute negligibly to IO 3 − formation. The IO 3 − yield increases to a maximum, before decreasing gradually, with increased PDS and Fe(II) dosages. The transformation of I − into IO 3 − is favored by lower pH and higher temperature, due to the greater SO 4 •- production by the reaction of Fe(II) with PDS under these conditions. Humic acid , as a representative natural organic matter, scavenges the formed HOI to form iodinated disinfection byproducts , which largely inhibit the transformation of I − into IO 3 − . In addition, the transformation of I − into IO 3 − and iodinated disinfection byproducts by Fe(II) activated PDS was confirmed in the natural waters.
研究领域:
环境化学
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水处理
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高级氧化过程
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产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 17
·2211979
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IF 19
Wenzheng Gao,Situo Cheng,Yaxiong Zhang,Erqing Xie,Jiecai Fu
Aqueous zinc Iodine batteries are considered as a promising energy storage system due to their high energy/power density, and safety. However, polyiodide shuttling leads to severe active mass loss, which results in lower Coulombic efficiency and limits the cyclic life. Herein, a novel structure-limiting strategy to pre-embed iodide ions into Prussian blue (PBI) is proposed. The DFT calculations and electrochemical characterization reveal that the formation of Ferrum Iodine bond reduces the electrochemical reaction energy barrier of subsequent iodide-ions at the pre-embedding sites, improves the I − oxidation reaction kinetic process, and suppresses the polyiodide self-shuttle. The PBI//Zn batteries exhibit a low Tafel slope (155 mV dec −1 ). Moreover, UV–vis spectroscopy confirms that the proposed strategy suppresses the polyiodide self-shuttle. As a result, the PBI//Zn battery achieves high iodide utilization and Coulomb efficiency (242 mAh g −1 at 0.2 A g −1 , CEs ≈ 100%), as well as high multiplicity performance of 197.2 mAh g −1 even at 10 A g −1 (82% of initial capacity). The PBI//Zn battery also renders excellent cyclic stability with a capacity retention of 94% at 4 A g −1 after 1500 cycles. The device exhibits a high energy density of 142 W h kg −1 at a power density of 5538 W kg −1 .
研究领域:
材料科学
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电化学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Xu Yang,Meng-Si Zhu,Xu-Qin Ran,Xiu-Ping Yan,Hai-Long Qian
Here we pioneer the design of a nitrogen-rich covalent organic framework (Tph-Pa) with a special α-diimine structure for the effective capture of organic iodine. Tph-Pa, consisting of pyridine-2,5-dicarboxaldehyde and 5,10,15,20-Tetrakis(4-aminophenyl)porphyrin, exhibits abundant nucleophilic N sites for interactions including α-diimine, imine and porphyrin to interact with iodine, and achieves an impressive static adsorption capacity of 1.66 g g −1 for CH 3 I. Furthermore, the adsorption of CH 3 I on Tph-Pa is predominantly controlled by electron density of N sites (α-diimine > imine > porphyrin), which efficiently facilitates the chemical N-methylation adsorption of CH 3 I. This work highlights the exceptional iodine capture capability of α-diimine-functionalized COFs.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Frontiers in Environmental Science
·
2025
·
IF 3.7
Renren Wang,Hao Xiao,Yi Tan,Luo Chen,Yuhang Zhou,Runfeng Xie,Chuan Tan,Yifei Yang,Cheng Liu,Hengyang Wang,Junxiao Yang,Tao Duan,Lin Zhu
The efficient capture of radioactive iodine is critical for nuclear safety due to its high mobility and toxicity. Bismuth sulfide (Bi2S3) aerogel, synthesized via a one-step hydrothermal method, demonstrates exceptional iodine adsorption performance. Characterization by scanning electron microscopy (SEM) and BET confirmed the material’s porous structure, which facilitated iodine uptake. Batch experiments revealed a high adsorption capacity of 1,204 mg/g, with kinetics and isotherms well described by the pseudo-second-order model and Freundlich isotherm, respectively, indicating that the adsorption process is dominated by chemisorption. The adsorption mechanism involves iodine phase transfer and subsequent formation of stable BiI3 phases, ensuring long-term immobilization. The Bi2S3 aerogel demonstrates superior chemical and thermal stability, high capture efficiency, and cost-effectiveness, further highlighting its practical potential for nuclear waste management. This work advances the design of bismuth-based adsorbents by combining high capacity, stability, and scalable synthesis, thereby offering a sustainable solution for radioactive iodine capture.
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产品关联
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-11
·
IF 16.6
Ma Wenjiao,Liu Tingting,Xu Chen,Lei Chengjun,Jiang Pengjie,He Xin,Liang Xiao
The battery chemistry aiming for high energy density calls for the redox couples that embrace multi-electron transfer with high redox potential. Here we report a twelve-electron transfer iodine electrode based on the conversion between iodide and iodate in aqueous electrolyte, which is six times than that of the conventional iodide/iodine redox couple. This is enabled by interhalogen chemistry between iodine (in the electrode) and bromide (in the acidic electrolyte), which provides an electrochemical-chemical loop (the bromide-iodate loop) that accelerates the kinetics and reversibility of the iodide/iodate electrode reaction. In the deliberately designed aqueous electrolyte, the twelve-electron iodine electrode delivers a high specific capacity of 1200 mAh g −1 with good reversibility, corresponding to a high energy density of 1357 Wh kg −1 . The proposed iodine electrode is substantially promising for the design of future high energy density aqueous batteries, as validated by the zinc-iodine full battery and the acid-alkaline decoupling battery.
研究领域:
电化学
·
电池技术
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材料科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Menglin Li,Xinpeng Wang,Jian Zhang,Yonghao Gao,Wen Zhang
The capture of toxic radioiodine is an increasingly important priority for the safe development of nuclear energy. Copper is a promising alternative for expensive silver to capture iodine. To develop novel copper-based adsorbents and determine the effect of copper species on iodine adsorption, the metal–organic framework with dual-pyrazole ligands (MOF-303) is employed as the scaffold to bind Cu 2+ species. Cu 0 nanoparticles were formed after the reduction by NaBH 4 . The obtained Cu 2+ -MOF-303 and Cu 0 -MOF-303 show high iodine uptake capacities at 353 K, 747 mg·g −1 and 837 mg·g −1 , respectively. They also show high iodine uptake capacities of more than 300 mg·g −1 at a high temperature (423 K), which are better than other Cu-based adsorbents. Besides, the loading of Cu can enhance the iodine selectivity under humid vapor, and iodine adsorption rate in iodine-cyclohexane solutions. The Cu 0 on Cu 0 -MOF-303 can react with iodine directly via the redox mechanism. For Cu 2+ -MOF-303, the adjacent pyrazole ligands can chelate with Cu 2+ ions strongly and transfer charges to trapped iodine to form polyiodide anions, and thus stable CuI species could also be generated. The strategy of anchoring Cu species using MOF-303 provides large channels for iodine diffusion, and highly-dispersed Cu and N sites for iodine capture.
研究领域:
核能
·
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）