SEPARATION AND PURIFICATION TECHNOLOGY
·
2017
·
IF 3.359
Yuehua Chen,Huiyong Wang,Yuanchao Pei,Jianji Wang
It is always difficult to separate scandium from yttrium and lanthanides due to their similar physicochemical properties. In this work, a selective separation strategy for Sc (III) from yttrium and lanthanides in aqueous solution was developed by using ionic liquids 1-alkylcarboxylic acid-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([(CH 2 ) n COOHmin][Tf 2 N]) (n = 3, 5, 7) as extractants and 1-alkyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([C n mim][Tf 2 N]) (n = 4, 6, 8, 10) ionic liquids as diluents. The extraction parameters such as phase valume ratio, equilibrium time, pH value of the aqueous phase, alkyl chain length of the extractants and diluents, and system temperature were investigated systematically. It was shown that the extraction efficiency of Sc (III) increased with the increase of aqueous phase pH value, and was as high as 99.5% at pH 4.2. Sc (III) could be extracted selectively from yttrium and lanthanides by simple tuning of pH value of the aqueous phase, and the separation factor was 10 3 . After the extraction, stripping of Sc (III) from the ionic liquids was attempted by using dilute aqueous HNO 3 . In addition, an ion exchange mechanism of the proton of extractants and the cation of the diluents was proposed from a series of control experiments. Since both the proton of the extractants and cation of the diluents participated in the extraction process, amount of the ionic liquids transferred to water phase can be greatly reduced compared with the cation exchange based metal extraction using only ionic liquid extractants.
研究领域:
化学工程
·
材料科学
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DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Hua Ying Chen,Bin Bin Chen,Shuai Chang,Jian Lv,Da Wei Li
Photoactive nanowires play an important role on the photoelectric-related applications; however, the in situ large-scale growth of photoactive nanowires on the arbitrary substrate still faces a great challenge. Herein, for the first time, we develop a facile coordination-induced self-assembly strategy for preparing the nanowires with high photoactivity through keeping a high concentration of Sc(NO3)3 and tartaric acid (TA) aqueous solution at room temperature. Surprisingly, the nanowires can grow directionally along the direction of water flow on any substrate due to the growth mechanism driven by water molecules, showing that the proposed nanowires are morphoplastic depending on the direction of liquid flow. The formation of nanowires has been proved to be attributed to the synergistic effect of water molecule-involved hydrogen bonding between hydroxyl groups of TA ligands as well as the multi-coordination of Sc3+ ions. Meanwhile, the prepared nanowires are highly photoactive, showing a strong photooxidation ability toward rhodamine 6G dyes, with a degradation efficiency of about 95.8% within 40 min. This finding introduces a coordination growth mechanism of nanowires, which not only provides a great possibility for large-scale and low-cost synthesis of photoactive nanowires with morphoplastic features but also shows a good application prospect in water cleaning by the photocatalysis technique.
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
LANGMUIR
·
2025
·
IF 3.9
Yiqian Su,Kailin Wen,Zhi Yang,Pengcheng Lin
Glutathione (GSH) is an important biochemical substance in the body, and efficient detection plays an important role in evaluating human health. This work develops a simple and efficient method for GSH detection by biomimetic enzyme-catalyzed colorimetric sensing. A novel scandium oxide crystal is prepared by a one-step pyrolysis method. The crystal structure, microstructure, and surface potential of scandium oxide crystals are analyzed by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and potentiometry. Furthermore, the scandium oxide crystal can catalyze the oxidation of the colorimetric substrate TMB in the presence of H2O2, exhibiting characteristics of peroxidase-like activity. Its catalytic effect is influenced by the concentration, temperature, pH, and reaction time, showing a certain degree of dependency. The Michaelis constants of scandium oxide crystal are 0.073 and 0.301 mM for H2O2 and TMB, respectively. Finally, an enzymatic colorimetric sensing method based on the scandium oxide crystal is established for the detection of GSH levels in human serum. The corresponding detection limit and linear range are 0.21 and 0.5–50 μM, respectively. This work provides new insights for developing detection materials and sensing methods toward GSH analysis.
研究领域:
生物化学
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材料科学
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医学诊断
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产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Bin Hu,Wenxuan Hu,Xinyuan Qian,Min Zuo,Ziliang Wu,Yihu Song,Qiang Zheng,Guorong Shan,Miao Du
Layered double hydroxides (LDHs) have garnered significant attention as electrode materials for their ultra-high theoretical capacitance. However, LDHs are prone to phase transition and volume changes during charge/discharge process, which adversely affect their cyclic stability and applications. In this paper, a small amount of non-electrochemically active element, scandium (Sc), was firstly introduced into NiCo-LDHs by a facile and fast one-step potentiostatic electrodeposition with NH 4 Br as a modulator, effectively mitigating the influence of the Jahn-Teller effect. By doping slight Sc into NiCo-LDHs, the resulting electrode exhibited excellent electrochemical performance , with a specific capacitance of 1994 F g −1 (at 1 A g −1 ), and ultralong lifespan, retaining 82.7 % of its initial capacitance after 30,000 charge-discharge cycles. This work presents a promising strategy for the rapid preparation of LDHs-based supercapacitor electrodes that deliver both high specific capacitance and outstanding cycling performance.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Lang Feng,Wei Long,Bin Li,Tao Li,Zhihong Zhang,Xiaohua Wang,Huiping Li
Red mud is an alkaline solid waste generated during alumina production and harbors significant scandium (Sc) resources. Sc holds substantial scientific and economic value due to its critical applications in metallurgy, chemistry, and electronics. However, traditional methods for extracting Sc from red mud are hindered by challenges such as prolonged mixing times, high energy consumption, and susceptibility to emulsification, which severely limit industrial application efficiency. To address these issues, this study designed and developed a microfluidic extraction platform utilizing laminar flow, slug flow, and micro-droplet systems. It systematically investigated the separation process of Sc 3+ using di-(2-ethylhexyl) phosphoric acid (P204) as the extractant. The microfluidic chip significantly enhanced the rapid mass transfer of Sc 3+ between phases by providing a larger interface area, thereby accelerating the extraction kinetics. This characteristic enabled the extraction process to reach equilibrium more quickly while ensuring operational stability and reproducibility. Experimental results demonstrated that, compared to solvent extraction (with an extraction efficiency of 74.6 %), the laminar flow achieved the selectivity separation efficiency for Sc 3+ ranging from 94.1 % to 96.4 %, with the reaction time reduced to 7.14–10 min. The slug flow improved mass transfer efficiency by promoting internal circulation within the droplets, achieving an extraction efficiency of 86.9 % to 94.8 %. Meanwhile, the micro-droplet attained the highest mass transfer efficiency of 92.9 % to 97.4 % by leveraging the large specific surface area and internal flow characteristics of the droplets. Therefore, the laminar flow is highly suitable for continuous operation and the rapid and efficient separation of rare earth elements from bulk solid waste. Additionally, the performance of the slug flow and micro-droplet is significantly superior to traditional solvent extraction methods, making them particularly suitable for high-selectivity separation of rare earth ions and small-scale processing applications. This study not only provides a novel strategy for the efficient recovery of Sc resources from red mud but also promotes the application and development of microfluidic technology in wet metallurgical engineering.
研究领域:
冶金工程
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环境科学
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化学工程
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产品关联
DOI
高影响因子
Materials Advances
·
2022
·Vol. 3
·期 10
·4381-4386
·
IF 0
Liyan Chen,Hangjie Jiang,Zhaohua Luo,Guoqiang Liu,Xianhui Wu,Yongfu Liu,Peng Sun,Jun Jiang
Cs2AgInCl6 lead-free double perovskite materials have potential applications in lighting and high-energy ray detection. However, the transition of Cs2AgInCl6 single crystals (SCs) is parity forbidden, resulting in low photoluminescence (PL) efficiency. In this study, we provide a strategy to break the parity forbidden transition by substituting Sc for In. The PL efficiency is greatly increased by 43%. In addition, the thermal stability is improved from 7.4%@475 K to 51.3%@475 K, which is attributed to the formation of Sc–Cl covalent bonds instead of In–Cl ionic ones. These results demonstrate that a suitable method makes a great contribution to promoting the possible application of Cs2AgInCl6 in the future.
研究领域:
材料科学
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光电
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固体物理
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产品关联
DOI
Materials
·
2025
·Vol. 18
·期 9
·1988
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IF 3.2
Yushi Qi,Fangming Wei,Yu Wang,Yu Jin,Xusheng Chang,Gang Chen
To enhance the mechanical properties of 6082 aluminum alloy, a novel Sc- and Zr-microalloyed 6082 alloy was fabricated through squeeze casting technology. Microalloying with Sc and Zr substantially refined the microstructure of alloy, achieving an average grain size of 136.36 μm—a 31.7% reduction compared to the baseline 6082 alloy. Furthermore, the addition of Sc and Zr effectively refined the coarse AlFeMnSi intermetallic phases, mitigating their inherent brittleness. The Sc/Zr-modified alloy exhibited delayed age-hardening kinetics, requiring 100% longer aging time to reach peak hardness due to Sc/Zr-induced retardation of β’’-phase precipitation. The optimized alloy demonstrated better mechanical properties, showing 10.4%, 8.0%, and 71.8% enhancements in yield strength, ultimate tensile strength, and elongation, respectively, over the non-microalloyed counterpart. The squeeze-cast Sc/Zr-modified alloy valve body showed yield strength exceeding 300 MPa and elongation above 10% across various sections, which verifies the effectiveness of this integrated microalloying and forming approach.
研究领域:
材料科学
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金属加工工程
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DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2019
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IF 2.781
Jun Wei Wang,Zelong Bao,Rong Qiao Xiang,Gao Hao Hu,Yong Kang Hu,Qing Ma,Bin Li,Hong Guang Jia
As a solar energy storage medium or heat transfer medium at moderate-high temperature, the molten NaCl-MgCl 2 has the advantages of high stability and low cost. But a pipe and container material with Cr will be corroded badly in a molten chloride. Based on the founded corrosion resistance phase (Fe 0.64 Ni 0.36 ) in previous experiments, the corrosion behavior of a new alloy of Fe-37 wt% Ni with rare earth alloy element Sc in the molten eutectic NaCl-MgCl 2 at 520 °C was studied. The corrosion rate of the Fe-37 wt% Ni alloy is lower than that of the researched Fe-based superalloys (GH1035 and GH1140). After corrosion for 15 h, a porous structure with Ni-rich and Fe-depletion is formed at the local location on the Fe-37 wt% Ni surface. For the specimens with Sc (0.3 and 0.5 wt %), a compact protective MgO layer covers on the porous structure, which prevents further corrosion in the molten salt . It is speculated that the Sc is oxidized to Sc 2 O 3 directly or by the chlorination-oxidation reactions, which improves the adhesion strength between the MgO layer and the alloy matrix by the effects of inhomogeneous nucleation and pinning.
研究领域:
材料科学
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腐蚀工程
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产品关联
DOI
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-11
·
IF 17.694
Liao Jinsheng,Wang Minghua,Lin Fulin,Han Zhuo,Fu Biao,Tu Datao,Chen Xueyuan,Qiu Bao,Wen He-Rui
Rare earth (RE 3+ )-doped phosphors generally suffer from thermal quenching, in which their photoluminescence (PL) intensities decrease at high temperatures. Herein, we report a class of unique two-dimensional negative-thermal-expansion phosphor of Sc 2 (MoO 4 ) 3 :Yb/Er. By virtue of the reduced distances between sensitizers and emitters as well as confined energy migration with increasing the temperature, a 45-fold enhancement of green upconversion (UC) luminescence and a 450-fold enhancement of near-infrared downshifting (DS) luminescence of Er 3+ are achieved upon raising the temperature from 298 to 773 K. The thermally boosted UC and DS luminescence mechanism is systematically investigated through in situ temperature-dependent Raman spectroscopy, synchrotron X-ray diffraction and PL dynamics. Moreover, the luminescence lifetime of 4 I 13/2 of Er 3+ in Sc 2 (MoO 4 ) 3 :Yb/Er displays a strong temperature dependence, enabling luminescence thermometry with the highest relative sensitivity of 12.3%/K at 298 K and low temperature uncertainty of 0.11 K at 623 K. These findings may gain a vital insight into the design of negative-thermal-expansion RE 3+ -doped phosphors for versatile applications.
研究领域:
材料科学
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光学
·
物理化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Lei Shi,Chunlin He,Xinsheng Li
A novel method for scandium recovery is proposed through high-surface area silanol-rich silica sorbents which were prepared with calcium silicate hydrate (C - S - H) as raw material. Two types of silanol - rich silica particles, i.e., LAC-S (silica derived from acid leaching of amorphous C - S - H) and LLC - S (silica derived from acid leaching of low-crystallinity C - S - H) are obtained after calcium ions are removed from both amorphous and low-crystallinity forms of C - S - H through a facile acid leaching process (3 mol/L, 25 °C, 24 h). 29 Si NMR spectroscopy reveals that the proportion of silicon atoms carrying silanol groups increases from less than 43% to over 80% when silica particles are transferred from a dry state to an aqueous solution. Batch adsorption experiments were conducted to evaluate the sorption performance and selectivity of these silica sorbents toward Sc(III).The scandium sorption capacities of LAC - S and LLC - S at an equilibrium pH of 4.2 are 174.45 and 129.57 mg/g, respectively. The separation factors (SF Sc/Ln ) of both silica particles exceed 1000 in the initial pH range of 3.5 to 5. The loaded scandium ions are recovered with 3 mol/L hydrochloric acid and the sorbents exhibit good reusability. This strategy provides an efficient and green method for recovering scandium from aqueous solutions.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Yuanyuan Li,Puxian Xiong,Gaochao Liu,Mingying Peng,Zhijun Ma
Bismuth (Bi)-activated luminescence materials have attracted much attention for their tunable broad emissions ranging from a visible to near-infrared (NIR) region. However, it remains a challenge to regulate the Bi valence state and achieve NIR emission via a facile way. Here, we report the design and preparation of Ba3Sc4O9:Bi phosphors, which emit visible and NIR emissions simultaneously even prepared in the air condition. The self-reduction mechanism of Bi3+ species in Ba3Sc4O9 with a rigid crystal structure is illustrated based on the charge compensation model, and the coexistence of different Bi-active centers, Bi3+ for visible emission, while Bi+ and Bi0 for NIR emission, is confirmed by the spectroscopic data and X-ray photoelectron spectroscopy (XPS) analysis. The enhanced NIR emission was further achieved through controlled reducing treatment and the related mechanism has also been clarified. This work paves a new way to control bismuth valence and tune the emission of Bi-based luminescence materials for emerging photonics applications.
研究领域:
材料科学
·
光学
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zhaolong Fu,Jie Gao,Meina Guo,Jieliang Chen,Houxing Chen,Weidong Xiao,Peihai Ju,Huimin Xie,Yinhua Wan,Hongdong Yu,Guan Peng,Da Zhao,Kang Hu
Scandium (Sc) is the most valuable rare earth element. However, it remains challenging to achieve effective separation and purification due to its low concentration as a by-product and the similarity of the coexisting metal elements. Herein, a kind of aluminum phosphate containing CO 3 2– is facilely synthesized which possesses high selectivity of Sc(III) against the competing metal ions (Ca(II), Mg(II), Ni(II), Co(II), Na(I), Zn(II), Cd(II)) and the other rare-earth ions. Notably, Aluminum phosphate can selectively capture Sc(III) over Fe(III) with a selectivity coefficient of 1.59. It also can be used to separate and purify Sc(III) from the real wastewater to obtain the purity of 99.0 % Sc(III) with the low cost. The results show that the adsorption process for Sc(III) was the single layer chemical adsorption with a maximum adsorption capacity of 273.9 mg/g. In addition, density functional theory calculations reveal that O atoms played the key role in the adsorption of Sc(III) and the addition of C atoms enhanced the adsorption between O atoms and Sc(III). This work offers a novel aluminum phosphate for the low-cost way for separation and purification of Sc(III) from wastewater.
研究领域:
材料科学
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环境科学
·
化学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）