CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Guangyuan Chen,Linzhen Wu,Zeru Wang,Ruixi Liu,Chuan Tan,Yi Tan,Yawen Liu,Miaomiao He,Hao Zhang,Yikun Huang,Jiongzhi Zhu,Tao Duan,Lin Zhu
The capture of radioactive gaseous iodine is essential for the sustainable development of nuclear energy and the long-term safe supply of nuclear fuel. However, the presence of nitrogen oxides in the exhaust gas generated during spent fuel reprocessing poses significant challenges to the stability of iodine adsorbents. It is crucial to consider the impact of NOx on the structure and adsorption performance of the materials. We report here the development of an aluminum-based metal–organic framework (MOF), CAU-1, engineered for efficient iodine capture. Synthesized through a cost-effective and straightforward method, CAU-1 exhibits excellent structural stability and robust adsorption performance, with a maximum iodine vapor adsorption capacity of 1277.18 mg/g at 130 °C and methyl iodide adsorption capacity of 533.10 mg/g, highlighting its potential for efficient iodine vapor removal. Notably, CAU-1 retains its structural integrity and iodine adsorption performance even in the presence of 5 % NO 2 , maintaining high adsorption capacities for I 2 (1129.41 mg/g) and CH 3 I (436.79 mg/g). Mechanistic analysis revealed the key role of the –NH 2 group in the iodine adsorption process. Additionally, co-adsorption studies with I 2 and NO 2 showed that CAU-1 can still capture iodine in the form of both I 2 and I 3 - in the presence of NO 2 . This study illustrates the potential of CAU-1 as an effective industrial adsorbent for removing iodine from NO 2 -containing gas streams.
研究领域:
材料科学
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核能工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Hao Zhang,Guangyuan Chen,Miaomiao He,Kui Tang,Haoyuan Li,Xuanhao Liang,Yanhao Song,Chuan Tan,Ling Zhang,Tao Duan,Lin Zhu
Efficiently removing both CH 3 I and I 2 from radioactive exhaust streams remains a challeng. In this study, we successfully synthesized a bismuth-based organic ionic polymers (Bi@OIP) embedded with palladium, designed for the co-adsorption of CH 3 I and I 2 . The Bi@OIP material demonstrates high uptake capacities of 2257.7 mg g −1 for iodine vapor and 390.0 mg g −1 for methyl iodide. Palladium embedded within the polymer matrix catalyzes the reaction between CH 3 I and Bi, leading to the formation of BiI 3 , thus overcoming the inertness of traditional bismuth-based adsorbents toward methyl iodide. This bismuth-palladium synergistic effect significantly enhances the co-removal capabilities for both iodine and methyl iodide, positioning Bi@OIP as a promising candidate for the efficient capture of radioiodine and methyl iodide from exhaust gases.
研究领域:
材料科学
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环境科学
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核能工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Qian Zhao,Xin Li,Guangyuan Chen,Zeru Wang,Chuan Tan,Cheng Liu,Hao Zou,Jing Ma,Lin Zhu,Tao Duan
Effective capture of radioactive iodine from nuclear fuel reprocessing is of great importance for public safety as well as the secure utility of nuclear energy. In this work, a hydrophobic nanosheet silicalite-1 (NSL-1) zeolite with an adjustable size was developed for efficient iodine (I 2 ) and methyl iodide (CH 3 I) adsorption. The optimized all-silica zeolite NSL-1 exhibits an excellent I 2 uptake capacity of 553 mg/g within 45 min and a CH 3 I uptake capacity of 262 mg/g within 1 h. Benefiting from the reduced thickness and enhanced porosity, microporous NSL-1 possesses enhanced iodine adsorption capacity and fast adsorption kinetics , which is a considerable high value among inorganic materials . Unexpectedly, the remarkable characters of high hydrophobicity , acid-resistance and anti-oxidation endow it a higher iodine uptake capacity than traditional aluminosilicate zeolites. More importantly, the high uptake selectivity toward I 2 possessed by NSL-1 owing to its hydrophobic skeleton under simulated dynamic conditions. The low cost, facile and scalable synthesis of NSL-1 further highlights great prospects for applications in the nuclear industry. This work provides useful insights for designing efficient adsorbents for iodine capture .
研究领域:
材料科学
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核能工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 36
·12560-12567
·
IF 7.059
Linlin Qiu,Lika Dong,Deqiang Mei,Wei-Hsiang Chen,Lixin Song,Jieqiong Wang,Jiacheng Zou,Pei-Cheng Jiang,Pingfan Du,Jie Xiong
Perovskite films can be prepared using sec-butyl alcohol (2-BA) by a one-step antisolvent assisted method. However, 2-BA dissolves a necessary perovskite precursor, methylammonium iodide, CH3NH3I, (MAI), which is lost during the fabrication, leaving behind residues of another perovskite precursor, PbI2. The resulting perovskite films show reduced power conversion efficiency (PCE) and poor stability to ambient conditions. In this work, we propose an elegant strategy, i.e., the introduction of a small amount of MAI dissolved in the antisolvent 2-BA (1 mg mL−1). The additional MAI can react with the residual PbI2 during the fabrication to form the desired organic–inorganic hybrid perovskite material, CH3NH3PbI3. The high-quality of the perovskite films obtained can provide larger grain sizes and smoother surfaces, with an ideal PCE of 19.29% and superior moisture stabilities.
研究领域:
材料科学
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太阳能技术
✓ 已验证
DOI
高影响因子
Journal of Ocean University of China
·
2020
·Vol. 19
·期 6
·1353-1361
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IF 0.802
Chen Yan,Liu Shanshan,Yang Guipeng,He Zhen
Methyl iodide (CH 3 I) is an important trace greenhouse gas in the atmosphere and an ozone-depleting substance. The influence of different environmental factors, such as the duration of illumination; the strength of illumination; the concentrations of humic acid, ferric ion (Fe 3+ ), and iodide ion (I − ); and pH, on the photochemical production of CH 3 I in artificial seawater (ASW) were tested by simulated solar irradiation. In addition, Yangtze River Estuary waters from inshore to offshore were used to explore the relationship between the photochemical production of CH 3 I and different sources of dissolved organic matter (DOM) in natural sea-water (NSW). The results revealed that higher concentrations of humic acid and I − , as well as higher strengths of illumination and longer illumination durations, promoted the photochemical formation of CH 3 I in ASW. The addition of Fe 3+ accelerated the photochemical production of CH 3 I, but high concentrations of Fe 3+ inhibited the formation of CH 3 I. Experiments on NSW obtained from the Yangtze River estuary spiked when concentrations of DOM were high, confirming that DOM plays an important role in facilitating the photochemical production of CH 3 I within the Yangtze River Estuary. The photochemical production of CH 3 I in the seawater was significantly higher under light conditions relative to dark conditions, indicating that illumination accelerated the production of CH 3 I.
研究领域:
海洋学
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
Science Bulletin
·
2018
·
IF 4.136
Aqiang Liu,Kang Liu,Huimin Zhou,Hongmei Li,Xiaoqing Qiu,Yi Yang,Min Liu
Organic-inorganic hybrid perovskite solar cells (PSCs), due to their high power conversion efficiency (PCE) and low cost, have been considered as one of the most promising photovoltaic devices . Well-distributed large-grain perovskite crystals play an important role for light adsorption and charge transfer. While, high quality perovskite crystals closely relate to the preparation method. Generally, the preparation of perovskite films requires a nitrogen atmosphere and toxic anti-solvents, which hinder their practical applications. Here, we reported a novel and simple solution evaporation process followed with a methylammonium iodide (MAI) solution immersion to prepare high quality perovskite films. Porous lead iodide (PbI 2 ) films were firstly formed by evaporation of PbI 2 precursor solution . The obtained porous PbI 2 films were completely transformed into well-distributed large-grain perovskite films after a quick MAI solution immersion. As a result, the corresponding PCE was enhanced by 30% compared to that prepared with a regular sequential deposition. This solution evaporation method provides a convenient and practical way for preparing high-quality perovskite films.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS LETTERS
·
2015
·Vol. 107
·期 6
·
IF 3.302
Liu Lijia,McLeod John A.,Wang Rongbin,Shen Pengfei,Duhm Steffen
The formation mechanism of perovskite methylammonium lead triiodide (CH 3 NH 3 PbI 3 ) was studied with in situ X-ray photoelectron spectroscopy (XPS) on successive depositions of thermally evaporated methylammonium iodide (CH 3 NH 3 I) on a lead iodide (PbI 2 ) film. This deposition method mimics the “two-step” synthesis method commonly used in device fabrication. We find that several competing processes occur during the formation of perovskite CH 3 NH 3 PbI 3 . Our most important finding is that during vapour deposition of CH 3 NH 3 I onto PbI 2 , at least two carbon species are present in the resulting material, while only one nitrogen species is present. This suggests that CH 3 NH 3 I can dissociate during the transition to a perovskite phase, and some of the resulting molecules can be incorporated into the perovskite. The effect of partial CH 3 NH 3 substitution with CH 3 was evaluated, and electronic structure calculations show that CH 3 defects would impact the photovoltaic performance in perovskite solar cells. The possibility that not all A sites in the A PbI 3 perovskite are occupied by CH 3 NH 3 is therefore an important consideration when evaluating the performance of organometallic trihalide solar cells synthesized using typical approaches.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
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
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
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
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Jiamin Luo,Heng Lu,Bao-Ying Wen,Qiaowen Zheng,Junying Zhang,Yishan Li,Wenping Hong,Shanshan Zhao,Libo Shun,Feiming Li,Zhixiong Cai,Jin-Ming Lin,Qiang Chen,Maosheng Zhang,Jian-Feng Li
Methyl iodide (CH3I) gas as a toxic gas causes great harm to organisms due to its high volatility and high reactivity with biological nucleophiles. Unfortunately, the sensing and detection of CH3I gas are challenging because of the diffusive nature of the gases and its low concentrations in the environment. Herein, we have developed a fast, green, and sensitive CH3I gas visual sensing method based on the capture technology of toxic gases by natural deep eutectic solvents (NADESs) coupled to the halide rapid exchange capability of perovskite nanocrystals (PNCs). In this strategy, NADESs are used as an absorption solution to adsorb gaseous CH3I, while simultaneously exposing I– through the action of the nucleophilic reagent; then, CsPbBr3 PNCs were synthesized in NADESs and used as sensing material to achieve I– exchange. Benefiting from the capture and enrichment of CH3I gas, the sensitivity of the gas sensor was highly improved. The sensor exhibited the lowest detection limit (limits of detection) of 164.15 μmol/m3, below the minimum safe level for human inhalation, which is 200 μmol/m3. This breakthrough offers greater possibilities for the quantitative detection of CH3I gas.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymer Chemistry
·
2024
·Vol. 15
·期 26
·2652-2661
·
IF 4.1
Jiaxin Yang,Shenglin Wang,Qianqian Yan,Hui Hu,Huanjun Xu,Haibin Ma,Xiaofang Su,Yanan Gao
With the global energy crisis stemming from the depletion of fossil fuels, the emergence of nuclear energy has spurred advancement in radioactive element capture technology. Radioactive iodine, found in nuclear waste, poses significant threats to both the environment and public safety. Consequently, the development of efficient radioactive iodine adsorbents has become a critical objective. In this study, we have successfully designed and synthesized three novel nitrogen-rich conjugated microporous polymers (CMPs), i.e., Car-CMP-1, Car-CMP-2 and Car-CMP-3. These CMPs exhibit outstanding iodine vapor capture capacities (4.98, 3.38 and 5.10 g g−1, respectively) at 75 °C under atmospheric pressure, as well as exceptional iodine capture abilities in n-hexane solution. Moreover, the captured iodine can be rapidly released in methanol, showcasing excellent recyclability. The extensive π-conjugated structure and abundant electron-donating nitrogen sites of CMPs contribute to their remarkable iodine capture performance. Additionally, the three CMP materials demonstrate superior capture efficiency for methyl iodide vapor (with adsorption capacities of 1.6 g g−1, 1.1 g g−1 and 1.9 g g−1, respectively) and the mixed vapor of iodine and methyl iodide. FT-IR, UV-vis and Raman spectroscopy analyses reveal the presence of electron donor–acceptor pairs between the CMPs and iodine, indicating the charge-transfer (CT) interactions that confer ultra-high iodine capture capabilities to CMPs.
研究领域:
材料科学
·
环境科学
·
核能技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yun-Yun Zeng,Lu-Yang Qiao,Shan-Shan Zong,Rong Guo,Jian-Kai Cheng,Xin-Yi Cao,Zhang-Feng Zhou,Mao-Hong Fan,Yuan-Gen Yao
Sintering caused catalyst deactivation resulting from the agglomeration of active metal sites. CH 3 I/CO based approaches are attractive owing to their effectiveness and mildness in rejuvenating sintered catalysts. However, few investigations have been reported for their application in oxides-supported catalysts. Herein, a landscape of reversible structural transformation of Pd/γ-Al 2 O 3 catalyst is depicted. The scenario of Pd redispersion in γ-Al 2 O 3 is significantly different from previously reported activated carbon-supported metal catalysts. Time-controlled CH 3 I/CO treatment facilitates the rapid redispersion of aggregated Pd particles on γ-Al 2 O 3 surface. The redispersion of Pd promotes the reactivity of Pd/γ-Al 2 O 3 catalyst. For dimethyl carbonate synthesis, the space-time yield increases from 556.9 g DMC ·kg cat. −1 ·h −1 to 1008.9 g DMC ·kg cat. −1 ·h −1 . For CO purification, 100% conversion of H 2 impurities and the rise of 27.4% in selectivity are achieved. The intrinsic oxidation rate is elevated from 607.8 mmol H2 ·g Pd −1 ·h −1 to 1166.5 mmol H2 ·g Pd −1 ·h −1 . However, complete oxidation and atomic dispersion of Pd cannot be achieved through further treatments. Combined characterizations verify the particle reconstruction of Pd and the evolution of anchoring sites on γ-Al 2 O 3 via strong metal-iodine binding. It reveals a double-edged-sword character of CH 3 I for Pd redispersion, wherein the excessive treatment results in re-aggregated Pd particles and inferior reactivity.
研究领域:
催化化学
·
材料科学
✓ 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）