TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
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2021
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IF 2.917
Qing SHU,Chun-fa LIAO,Wen-qiang ZOU,Bao-quan XU,Yu-hui TAN
The adsorption characteristics and mechanisms of spirulina powder were investigated when it was used as adsorbent to recover ytterbium(III) from wastewater solution. Surface structure and element valence of the adsorbent were analyzed by SEM and XPS for the exploring of its adsorption mechanism for ytterbium(III). The adsorption characteristics of ytterbium(III) on spirulina powder was analyzed through assessing adsorption isotherm, kinetics and thermodynamic models. The adsorption isotherm data were best explained by Langmuir model, and the adsorption capacity of spirulina powder for ytterbium(III) was 72.46 mg/g when adsorption temperature was 318 K. The kinetic experiment results showed that the pseudo-second order kinetic model can better simulate the adsorption process of spirulina powder to ytterbium(III), indicating that the rate-controlling step was chemical adsorption. Spirulina can be an efficient and economical ytterbium(III) recycling material, because it showed good adsorption stability and reusability from the adsorption−desorption cycle experiment results.
研究领域:
环境科学
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生物技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2020
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IF 7.183
Yitan Wang,Li Chen,Yongsheng Yan,Ji Chen,Jiangdong Dai,Xiaohui Dai
Adjacent rare earth separation has always been one of the hardest separation tasks around world. In this article, a task-specific ionic liquid Cyphos IL 104 embedded polymer inclusion membrane (PIM) was fabricated to realize the adsorption and separation of adjacent heavy rare earth elements Lutetium (III) and Ytterbium (III). Chemical composition of the PIM was verified by attenuated total reflectance Fourier transformed infrared spectroscopy and X-ray photoelectron spectroscopy. And results confirmed only P O and P–O groups participated in the formation of Rare Earth (III)-Cyphos IL 104 complex. A typical thumb-like asymmetric structure was observed by scanning electron microscopy. And the addition of Cyphos IL 104 promoted the hydrophilicity of the PIM as the water contact angle became smaller. Static adsorption and dynamic transport performances were studied in details to get the optimum separation condition. The permeability coefficients of Yb(III) and Lu(III) were 156 μm s −1 and 114.82 μm s −1 , respectively; And the initial membrane fluxes were 90.17 μm m −2 s −1 and 65.61 μm m −2 s −1 , respectively. The separation factor between Yb(III) and Lu(III) was calculated as 1.37 under the optimized transport condition. All these would provide promising developments of adjacent heavy rare earth separation with an efficient and practical membrane strategy.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2023
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IF 3.8
Yu-Li Dang,Li-Xia Xie,Na-Na Fei,Ru Qiao,Zhan-Qi Cao,Li-Jie Liu,Guo-Xing Liu,Xin Zheng,Yun-Lai Ren,Xia Sheng,Sheng-Qiang Guo,Cao-Yuan Niu
Two porphyrin ligands with peripheral chelate groups linked at meso and β positions and their two new non-sandwich-type ytterbium(III)-porphyrin coordination compounds have been synthesized. New porphyrin compounds and the two coordination compounds were characterized by Nuclear Magnetic Resonance, High Resolution Mass Spectrum, Ultraviolet and visible, and fluorescence in the visible and Near Infrared (NIR) regions. The two Yb(III) complexes afforded the photoluminescence quantum yields of 2.0% and 1.6% for Yb(III) characteristic NIR emission in DMSO. Finally and importantly, the impact factors on the sensitization of Yb(III) NIR emission by porphyrin ligands via non-sandwich-type linkage were investigated by theoretical calculations and further measurements on fluorescent properties. It is proposed that the sensitization efficiency for the distance between the sensitizer and Yb(III) NIR emitter is better than that for conjugated degree of the peripheral porphyrin linkage.
研究领域:
化学
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光物理学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
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2025
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IF 4.7
Guozhu Ren,Tingyu Pan,Yue Xu,Jingyu Wang,Lingdong Wang,Ruiping Deng,Shihong Zhou,Long Tian,Xiaojie Wu,Liang Zhou
Since the O–H and N–H oscillators of solvent molecules attached to ytterbium ion (Yb3+) and C–H oscillators existing in the inner coordination sphere of Yb3+ would quench the excited energy of Yb(III), which leads to low quantum yields (QYs) of Yb(III) complexes, we aimed to design a ligand that could block solvent molecules and C–H oscillators out of the first coordination sphere of Yb3+. Herein, a series of novel polycyclic aromatic dicarboxylate ligands are designed and synthesized to effectively protect Yb3+ from solvent molecules and efficiently sensitize Yb3+ luminescence, while the cost and sophistication of the synthesis are satisfactory. Therein, [Yb(MO–DPyPDA)2](DIEA) exhibited a considerable QY of 5.20% and a long luminescent lifetime of 102 μs in CD3OD. The single-crystal structure demonstrates that there are no solvent molecules and C–H oscillators existing in the inner coordination sphere of Yb3+, which is conducive to alleviating the quenching effect. Meanwhile, we also carried out experiments to verify that it was thermodynamically feasible for ligands to sensitize the luminescence of center ion through internal redox processes. Moreover, several groups of near-infrared organic light-emitting diodes based on [Yb(DTFM-DPyPDA)2](DIEA) were fabricated based on the solution-processing method, and the highest irradiance of 110,284 μW/m2 was realized by optimizing the device structure.
研究领域:
材料科学
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光学
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
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2025
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IF 4.3
Chengyu Sun,Yihao Ji,Wenyan Huang,Fuli Deng,Yi Zhang
The recovery of rare earth elements from mineral wastes is extremely critical for the soaring global demand due to their unique roles and resource scarcity. In this work, the defective phosphoric acid functionalized UiO-66-COOH (UiO-66-COOH-OP-ST2) was prepared via the successive phosphoric acid functionalization and defect modulation procedures towards UiO-66-COOH. The adsorption results disclosed that maximal adsorption capacities of UiO-66-COOH-OP-ST2 and phosphoric acid functionalized UiO-66-COOH (UiO-66-COOH-OP) were found to be 132.76 and 83.11 mg/g at pH = 6, respectively. Adsorption kinetics curves and isotherms revealed that the adsorption process was consistent with pseudo second order kinetic model and Langmuir isothermal model. Furthermore, UiO-66-COOH-OP-ST2 can maintain 91.74 % of initial adsorption capacity after five consecutive adsorption–desorption cycles, and exhibit no significant changes in the XRD patterns, demonstrating an excellent recycling stability. In addition, the adsorption mechanism elucidated that the elevated adsorption performance was mainly attributed to the electrostatic attraction and complex interaction between the O sites and Yb(III) based on EDS and XPS analysis. This work efficiently improved adsorption performance of metal organic frameworks after simultaneously grafting functional groups and creating defective sites without affecting their stabilities.
研究领域:
环境化学
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材料科学
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无机化学
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吸附分离
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稀土元素回收
✓ 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）