Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2025
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IF 4.6
Hao Zou,Hailong Dong,Wanjiang You,Shilong Song,Lei Liao,Gaoling Liang,Ning Pan,Hao Lei,Xiaoqiang Wang
The bismuth-embedded columnar activated carbon (Bi-AC) composite was prepared by the method of self-reduction and investigated for trapping I 2 and CH 3 I. Our findings showed that the bismuth-based compounds mainly existed as simple substance in Bi-AC. The elemental bismuth was regularly spherical in the shape, and mostly embedded on the surface of activated carbon, seldom inside of activated carbon. The capture capacities of I 2 and CH 3 I by the Bi-AC composite was 569.0 ± 14.2 and 232.1 ± 17.7 mg/g, respectively, which was better than that of the commercial silver-based materials. I 2 was trapped to form I 5 - and Bi(IO 3 ) 3 , while CH 3 I was catalytically cleaved to form BiOI and I 5 - . The Bi-AC composite is expected be used as adsorbents of 129 I to replace silver-based materials due to its high performance and low cost.
研究领域:
环境科学
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核化学与放射化学
✓ 已验证
产品关联
DOI
高影响因子
Science China-Chemistry
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2024
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IF 10.4
Tai Bo,Li Baoyu,He Linwei,Ma Zhonglin,Lin Shujing,Zhang Mingxing,Chen Junchang,Wu Fuqi,Chen Long,Dai Xing,Ma Fuyin,Chai Zhifang,Wang Shuao
The development of adsorbent materials for effective capture of radioactive iodomethane (CH 3 I) from the off-gas of used nuclear fuel reprocessing, remains a significant and challenging line of research because currently state-of-art adsorbents still suffer from low binding affinity with CH 3 I. Here, we proposed a brand-new adsorption topological structure by developing a 2D interdigitated layered framework, named SCU-20, featuring slide-like channel with multiple active sites for CH 3 I capture. The responsive rotating-adaptive aperture of SCU-20 enables the optimal utilization of all active sites within the pore for highly selective recognition and capture of CH 3 I. A record-breaking CH 3 I uptake capacity of 1.84 g/g was achieved under static sorption conditions with saturated CH 3 I vapor. Both experimental and theoretical findings demonstrated that the exceptional uptake of SCU-20 towards CH 3 I can be attributed to the confined physical electrostatic adsorption of F sites, coupled with the chemical nitrogen methylation reaction with uncoordinated N atoms of pyrazine. Moreover, dynamic CH 3 I uptake capacity potentially allows for the capture of CH 3 I in simulated real-world off gas reprocessing conditions. This study highlights the potential of SCU-20 as a promising candidate for efficient capture of iodine species and contributes to the development of effective solutions for radioactive iodine remediation.
研究领域:
化学
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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 PHYSICAL CHEMISTRY A
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2017
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IF 2.847
Peiwen Wang,Nan Zhao,Yizhen Tang
Methyl iodine (CH3I) and carbon tetrachloride (CCl4) are both important volatile precursors for atmospheric ozone destruction. CH3I and CCl4 can act as halogen bond donors to form molecular complexes with atmospheric organic species, such as 2,5-dihydrofuran, tetrahydrofuran, and acetone. This study characterized the halogen bonds in the CH3I and CCl4 complexes using matrix isolation infrared spectroscopy and density functional theory calculations. With the combination of vibrational frequencies in spectra and the calculated interaction energies, frequencies and atoms-in-molecules analyses, we confirmed the formation of halogen-bonded complexes. CH3I as a halogen-bond donor is comparable or slightly weaker than CCl4, and furans involving ether oxygens are better halogen acceptors than acetone. The results help to understand the possibilities of formation of atmospheric molecular complexes that may influence the atmospheric chemical activities and enhance the aerosol formation.
研究领域:
物理化学
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大气化学
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光谱学
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量子化学计算
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分子间作用力
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环境化学
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
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2024
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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
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环境科学
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）