JOURNAL OF MOLECULAR LIQUIDS
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2019
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IF 4.561
Ziheng Bai,Qi Liu,Hongsen Zhang,Jingyuan Liu,Jing Yu,Jun Wang
The development of nuclear energy requires the consumption of large amounts of uranium resources, and the uranium in seawater is very abundant. Therefore, it is very important to collection of uranium from seawater using efficient and convenient methods. In this work, imidazole-4, 5-dicarboxylic acid (H 3 IMDC) was introduced onto the surface of hemp fibers (HF) by two-step method to prepare a novel bio-based polymeric material HF-H 3 IMDC 3 adsorbent containing imidazole nitrogen and carboxyl groups. The introduction of H 3 IMDC could improve the activity sites and hydrophilicity of the HF, which significantly increased the adsorption capacity of uranium. The results showed that the maximum adsorption capacity of HF-H 3 IMDC 3 is 469.48 mg/g at pH 7.0 and 313 K. Adsorption process was more suitable for the pseudo-second order model. Moreover, HF-H 3 IMDC 3 exhibited good selectivity and reusability. More importantly, the HF-H 3 IMDC 3 also presented excellent adsorption performance in natural seawater, indicating that HF-H 3 IMDC 3 has a great prospect for the extraction of U(VI) from seawater.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 14
·2966
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IF 4.6
Tian Lan,Xiechun Liu,Haifeng Cong,Xiaofan Ding,Jing Zhao,Songtao Xiao
In this study, a novel adsorbent, UiO-66-H3IMDC, was successfully prepared by functionalizing UiO-66 with imidazole-4,5-dicarboxylic acid (H3IMDC). The effective functionalization of H3IMDC on UiO-66 was confirmed by powder X-ray diffraction (PXRD) and Fourier transform infrared spectroscopy (FT-IR). The relationships between the adsorption of U(VI) on UiO-66-H3IMDC and the contact time, the pH of the solution, as well as the initial concentration of U(VI) were investigated. Additionally, the selective adsorption of U(VI) by UiO-66-H3IMDC and its cyclic regeneration performance were also studied. The results demonstrate that the UiO-66-H3IMDC adsorbent exhibits excellent adsorption performance for uranium in aqueous solutions.
研究领域:
环境科学
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材料科学
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化学工程
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放射化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COORDINATION CHEMISTRY
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2019
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IF 1.685
Yafang Ge,Guoting Li,Dongxia Fu,Lina Liu,Benlai Wu
Two metal–organic frameworks based on a multifunctional ligand 2-(5-bromo-pyridin-3-yl)-1H-imidazole-4,5-dicarboxylic acid (H3L), [Mn(HL)(C2H5OH)]n (1) and {[Zn(HL)(H2O)2]·H2O}n (2), have been hydro/solvothermally synthesized and characterized by IR, elemental analyses, X-ray powder and single-crystal diffractions, and thermogravimetric analyses. In 1, (HL)2– ligands adopt the μ
3-kN,O:kN′,O′:kN′′ coordination mode and use their imidazoledicarboxylates to bis-chelate MnII into left- and right-handed helixes which are further bridged into a mesolayer structure with (4·82) topology through the coordination of their pyridyl groups. In 2, (HL)2– ligands only use their imidazoledicarboxylates to bis-chelate ZnII into linear chains which are further linked into a 2D supramolecular framework through interchain hydrogen–bonding interactions. Interestingly, the structures of 1 and 2 are mainly dominated by the bis-N,O-chelation of the imidazoledicarboxylate in (HL)2–. As for the formation of the imidazoledicarboxylate-bridged helical chains in 1 or straight chains in 2, it largely depends on the cis- or trans-chelation of two imidazoledicarboxylates around the same metal center. Magnetostructural analysis of 1 discloses that the bis-N,O-chelating imidazoledicarboxylate of (HL)2– transmits antiferromagnetic interactions along the imidazoledicarboxylate-bridged helical chain with the spin-coupling constant of –0.71 cm–1. Additionally, 2 emits greatly enhanced blue fluorescence mainly originating from the intraligand charge transition.
研究领域:
材料科学
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化学
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配位化学
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晶体工程
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2024
·
IF 4.3
Wenqing Li,Jingyue Zhang,Linhan Fan,Yun Zhao,Changyan Sun,Wenjun Li,Zhidong Chang
Aniline is an organic pollutant with carcinogenicity and teratogenicity, while F - and Hg 2+ are toxic ions that are easily soluble in water. When they are released to the environment, they will pose a threat to human health. Designing a material that can simultaneously detect three types of pollutants is of great significance. In this paper, a novel rare earth metal organic framework material (Eu-MOF) with three-dimensional structure based on 1-methylimidazole-4,5-dicarboxylic acid was synthesized for the first time through solvent thermal method. It has excellent luminescent performance and can be used as a multifunctional fluorescent probe to detect aniline, F - , and Hg 2+ based on photoinduced electron transfer, energy competitive absorption, and ion exchange mechanisms, with detection limits of 1.79 × 10 -8 , 8.13 × 10 -8 , and 8.83 × 10 -7 M, respectively. It is worth noting that Eu-MOF can detect F - and Hg 2+ in real water samples, such as lake water and green tea water, with favorable recovery rates.
研究领域:
材料科学
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环境化学
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分析化学
✓ 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）