ENERGY & FUELS
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2023
·
IF 5.3
Lu Qin,Jianjian Zhong,Jianling Li
A prominent topic in related fields is the search for cathode materials for aluminum-ion batteries (AIBs) with high specific capacity and outstanding cycle performance. MXenes, a two-dimensional layered material, can be used for a variety of energy storage purposes. However, their application in AIBs is hampered by poor capacity and significant self-accumulation. In this study, we employ a simple two-step process, first electrostatically adsorbing Cu2+ on MXenes and then in situ selenizing MXenes layers to produce TiSe2. The composite product F-Ti3C2Tx@Cu@TiSe2 exhibits an initial discharge specific capacity of 360.3 mAh g–1, and the capacity remains at 267.5 mAh g–1 after 100 cycles. In contrast, the directly selenized F-Ti3C2Tx@TiSe2 without Cu2+ shows a capacity of just 77.2 mAh g–1 after 100 cycles. This huge improvement is due to the fact that the electrostatic adsorption of Cu2+ on MXenes induces polarized sites with high electron density and optimizes the spatial structure of MXenes. This phenomenon effectively alleviates self-accumulation, providing a larger specific surface area and making it easier for [AlCl4]− to embed and escape. Through the X-ray photoelectron spectroscopy test and charge and discharge curves, it is found that the main capacity of the material comes from the redox reaction of [AlCl4]− and selenides in AIBs. Herein, the utilization of Cu2+ adsorbed MXenes as precursors followed by in situ selenization is innovative and also validates the great potential of Cu2+ adsorption in the field of electrochemistry.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
Minerals
·
2021
·Vol. 11
·期 1
·61
·
IF 2.644
Wenjie Zhang,Xian Xie,Xiong Tong,Yunpeng Du,Qiang Song,Dongxia Feng
Solvent extraction is the most widely used method for separation and purification of rare earth elements, and organic extractants such as di(2-ethylhexyl) phosphoric acid (P204) and di(1-methyl-heptyl) methyl phosphonate (P350) are most commonly used for industrial applications. However, the presence of impurity ions in the feed liquid during extraction can easily emulsify the extractant and affect the quality of rare earth products. Aluminum ion is the most common impurity ion in the feed liquid, and it is an important cause of emulsification of the extractant. In this study, the influence of aluminum ion was investigated on the extraction of light rare earth elements by the P204-P350 system in hydrochloric acid medium. The results show that Al3+competes with light rare earths in the extraction process, reducing the overall extraction rate. In addition, the Al3+stripping rate is low and there is continuous accumulation of Al3+in the organic phase during the stripping process, affecting the extraction efficiency and even causing emulsification. The slope method and infrared detection were utilized to explore the formation of an extraction compound of Al3+and the extractant P204-P350 that entered the organic phase as AlCl[(HA)2]2P350(o).Keywords:Al3+;light rare earths;P204;P350;impurity
研究领域:
化学工程
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材料科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Miaomiao Chen,Meng Zhou,Yunyun Wang,Caihong Mao,Shujie Pang,Ting Meng,Xudong Yang
To address the challenges associated with the storage and application of traditional carbon dot (CDs) solutions, this study introduces a cyan fluorescent carbon dot-based hydrogel (CDs-SCH). The hydrogel was synthesized by integrating cyan fluorescent CDs, derived from penicillamine and m -phenylenediamine, with carboxymethylcellulose (CMC) and sodium alginate (SA), which was then mixed with acrylamide (AM). The resulting CDs-SCH hydrogel was extensively characterized, focusing on its morphology, chemical structure, and fluorescence behavior. The fluorescence intensity of the hydrogel was enhanced by 3.23 times compared to the original CDs. The fluorescence response of the CDs-SCH hydrogel to pH variations was examined, demonstrating its capability to visually monitor the freshness of aquatic products such as fish and shrimp. Furthermore, Al 3+ and Ag + ions were found to significantly modulate the fluorescence, with Al 3+ enhancing and Ag + quenching the fluorescence, displaying reliable detection limits and linearity. The hydrogel's ability to detect glutathione (GSH) via Ag + reduction to Ag was also explored. Additionally, the hydrogel exhibited stable Al 3+ adsorption, with the process following pseudo-second-order kinetics and the Langmuir adsorption model. As a versatile and responsive material, the CDs-SCH hydrogel holds potential for applications in intelligent food packaging and environmental ion detection.
研究领域:
材料科学
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环境科学
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食品科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2020
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IF 3.306
Chun Kan,Xiaotao Shao,Linyun Wu,Yao Zhang,Xiaofeng Bao,Jing Zhu
High-selectivity detection of trace Al 3+ ions in water and biological systems by a fluorescence imaging method is not yet mature. Herein, we synthesized a novel reversible Al 3+ -specific fluorescent probe named RBLF by linking Rhodamine B and pyridine-3-sulfonyl chloride through o-phenylenediamine in several reactions. RBLF exhibited an ultra-high sensitive and excellent selective response towards Al 3+ by fluorescence and UV–vis spectra in aqueous solutions. What is more worth mentioning is that its response is fast, dual changes in color and fluorescence of the probe solution that can occur instantaneously after adding with Al 3+ . Its detection limit for Al 3+ ions in aqueous system solutions is 14.23 nM, which is far below the maximum allowable amount of Al 3+ in drinking water. Moreover, the probe provided an effective method for detecting low concentrations of Al 3+ in natural water, living cells, zebrafish and plant tissues.
研究领域:
分析化学
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生物医学
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环境科学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2024
·
IF 4.9
Zengchen Liu,Weijie Yang,Wenping Zhu,Hongyu Chen,Yahong Chen,Ruilan Liu,Yali Cui,Yanxia Li,Baodui Wang
Fluorine is one of the essential trace elements for human body, which is essential for calcification process in living organisms. In the paper, a “off–on” fluorescence sensor for fluorine ion based on aluminium ion and boric acid codoped carbon dots was synthesized and characterized. According to fluorescence analysis, the water-soluble sensor exhibited highly selective and sensitive for fluorine ion. In sensing process, F - could bind to Al 3+ after the addition of fluorine ion, which resulted in the decomposition of Al-BA-CDs system, then intense yellow fluorescence signal appeared. Moreover, the fluorescence sensor exhibited low detecting limit (5.0 nanomolar level) by fluorescence titration spectrum. In addition, according to evaluate the fluorescence sensing properties of F - in HepG2 cell and zebra fish, this job greatly extended the use of F - sensor from aluminium ion and boric acid codoped carbon dots in organism. The work also provided an interesting idea for fabricating water-soluble fluorescence sensor for F - .
研究领域:
分析化学
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生物医学
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环境科学
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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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2018
·
IF 2.88
Xu Tang,Zhi Zhu,Renjie Liu,Liang Ni,Yue Qiu,Juan Han,Yun Wang
A novel fluorescence probe L2 based on coumarin has been designed and synthesized. The probe L2 can be used for relay recognition of metal ions Al 3+ and anion F − in the aqueous HEPES buffer (0.05 M, pH = 7.4), and build a OFF-ON-OFF detection system. The probe showed high selectivity and sensitivity to target ions in the process of relay recognition, and the corresponding detection limit could be as low as 0.014 μM (Al 3+ ) and 0.03 μM (F − ). Besides, the geometry optimizations of probe L2 and [L2 + Al 3+ ] complex were carried out using the Gaussian 16 program based on DFT, and the identification mechanism of the probe was also discussed by the mass spectrometry and theoretical calculations. Moreover, the probe has also been successfully applied to detection of target ions in living cells.
研究领域:
分析化学
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生物医学
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材料科学
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产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2016
·Vol. 183
·期 9
·2547-2553
·
IF 4.831
Qu Fei,Sun Zhe,Liu Dongya,Zhao Xianen,You Jinmao
The authors describe dual-emission carbon nanodots containing blue emitters (BE; peak emission at 385nm under 315 nm excitation) and yellow emitters (YE; peak emission at 530 nm under 365nm excitation), and how they can be applied to direct and indirect determination of tetracyclines (TCs). The direct detection scheme is based on the finding that tetracycline (TET), oxytetracycline, chlortetracycline and doxycycline quench the two emissions of the carbon dots. While direct determination is rapid and convenient, it cannot differentiate between TCs. The indirect detection scheme, in contrast, is based on the finding that Al (III) ions enhance the fluorescence of the YE in the carbon dots, and that they cause a blue shift in emission. It is, however, known that TET forms a strong complex with Al (III), and this can inhibit the interaction between Al (III) and the YE, so that the fluorescence of YE is not enhanced and blue-shifted by Al (III) in the presence of TET. This finding is exploited in a fluorescence turn-on/off assay for TET that can distinguish TET from other TCs. The linear range of indirect determination for TET extends from 1 nM to 30 μM, and the limit of detection is 0.52 nM. The indirect method was successfully applied to the determination of TET in spiked milk, fish and pork, and recoveries ranged from 91.7 to 102 %.
High concentrations of tetracyclines quench the dual (blue and green) emission of carbon dots. Additionally, based on the fluorescence enhancement of yellow emitters by Al 3+ , an indirect turn-on/off detection of tetracycline is established with high selectivity and sensitivity.
研究领域:
分析化学
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纳米材料科学
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环境科学
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2019
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IF 3.206
Meng-Xia Huang,Jia-Ping Lai,Hui Sun,Wei-Zhen Wu
A simple, highly selective and ultra-sensitive “off-on-off” fluorescent chemosensor L for successive detection of Al 3+ and PO 4 3 − was synthesized and characterized. Sensor L showed a remarkable and highly selective fluorescence enhancement towards Al 3+ against other interfering cations, owing to the suppression of intramolecular charge transfer (ICT) mechanism and CH N isomerization . A good linear relationship (R 2 = 0.9974) was obtained between the fluorescence emission intensity of L and the concentration of Al 3+ (0.025–2.0 μM) with the detection limit of 3.8 nM, which is much lower than the most literature reported. And the binding stoichiometry between L and Al 3+ is 1:1 according to Job's Plot and ESI-MS. The resultant complex can be further utilized as a secondary probe for determination of PO 4 3 − with the detection limit as low as 0.56 μM. Meanwhile, the sensor L was successfully applied to detect Al 3+ in real water, illustrating that sensor L was a promising alternative route for Al 3+ detection. Additionally, the sensing mechanism of L to Al 3+ was further demonstrated in detail by IR and 1 H NMR titration experiment. The successive recognition feature of sensor L has the potential to quantitative analysis of Al 3+ and PO 4 3 − in environment samples.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2018
·
IF 2.88
Xiang-yu Kong,Ling-Jie Hou,Xiu-qing Shao,Shao-Min Shuang,Yu Wang,Chuan Dong
A novel fluorescent probe , phenolphthalein‑dialdehyde‑(2‑pyridyl) hydrazone (L), for sequentially detecting Al 3+ and F − in almost 100% aqueous medium was successfully designed and synthesized. The probe offers two binding pockets for Al 3+ to form a 1: 2 ligand/metal complex, leading to a significant fluorescence enhancement at 465 nm. Further, the in-situ formed L-Al complex acts as a secondary fluorescent chemosensor for F − by quenching the fluorescence of the complex with high selectivity. The detection limit for Al 3+ and F − sensing is 2.28 nM and 0.13 μM, respectively, which are far below the World Health Organization (WHO) acceptable limits (7.41 μM for Al 3+ ion and 79 μM for F − ) in drinking water . The probe L was successfully applied to the detection of Al 3+ and F − in cells using fluorescence microscopy .
研究领域:
分析化学
·
生物医学
✓ 已验证
DOI
PubMed
高影响因子
Materials Today Energy
·
2020
·
IF 5.604
X. Huang,J. Duan,J. He,H. Shi,Y. Li,Y. Zhang,D. Wang,P. Dong,Y. Zhang
Rapid moisture and carbon dioxide uptake in Ni-rich materials deteriorates their processing properties, thermal stability and electrochemical performance. Water washing is a widely used method to efficiently remove Li-based residues from these materials. In this paper, a detailed investigation of ion behavior during washing was carried out for LiNi 0.815 Co 0.15 Al 0.035 O 2 (NCA). Multiple characterizations including inductive coupled plasma atomic emission spectrometry (ICP-AES), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS) depth profiles show that certain amount of Li + and Al 3+ are lost from the near-surface of NCA during washing process, which is one of the key issues that lead washed samples suffer from poor electrochemical performance and structural stability. The excess LiOH·H 2 O ratio in mixing and high temperature sintering during NCA synthesis has a remarkable effect on the Al 3+ dissolution ratio, and the loss rate of Al 3+ is as high as 23.14% for lithium excess ratio up to 10 at.%. Characterization analyses of the electrochemical performance, structure, morphology and elemental chemical state of the samples demonstrate that the dissolution of Li + and Al 3+ from NCA deteriorates the cyclic performance, structural stability and thermal stability.
研究领域:
材料科学
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电化学
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DOI
高影响因子
RESOURCES CONSERVATION AND RECYCLING
·
2025
·
IF 10.9
Fei Han,Yaohui Xie,Lin Qu,Zhenzhou Wang,Wei Zhang,Guang Yang,Huiqin Hu,Meiting Huang,Haoxuan Yu,Liming Yang,Xubiao Luo
Deep removal of trace aluminum from lithium extraction slag (LES) is key to recovering high-purity battery-grade iron phosphate (FePO 4 ). Existing methods exhibit low aluminum removal due to the close solubility product constants of Al (III) and Fe (III). In this work, we propose a novel strategy for trace aluminum removal based on fluoride ion-mediated differential coordination of Al (III) and Fe (III). Through precise control of fluoride ion concentration in phosphoric acid solution, iron preferentially precipitates while aluminum predominantly forms soluble fluoride complexes. This distinct behavior enables precise elemental separation through fluoride content optimization. The developed separation technology achieved aluminum removal rate of 98.89 %. It is noteworthy that the aluminum content of precipitated FePO 4 is below 30 ppm, which meets the standard of battery-grade. This work provides a viable technical pathway for the industrialization of Al/Fe separation in the lithium extraction slag leachate and the regeneration of low-Al, high-purity FePO 4 .
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Yuanyuan Cai,Zuoren Nie,Xiaoli Xi,Yajiao Zhang,Lu Deng,Zhiyong Zhao,Yingliang Tian
Separation and recovery of molybdenum (Mo) with high concentrations from spent catalysts is a strategy for avoiding the environmental footprint by metal mining and the disposal of hazardous wastes, while alleviating resource shortage. In this paper, a method for constructing a binary (SiO2–Na2O)/ternary (SiO2–Na2O–B2O3) glass phase extraction (GPE) system to selectively extract the impurity metal ions from spent catalysts as well as simultaneously separate and recover Mo is presented. Based on experimental studies and classical molecular dynamics simulations, compared with the binary glass network, 99.4% of Al3+ and Ni2+ in spent catalysts were extracted in a more stable tetra-coordinated form at a lower melting temperature (1200 °C) by the ternary GPE system introducing B2O3, accompanied by Na2MoO4 precipitated as the recovery product. The recovery efficiency of Mo was 98.1%, realizing an efficient separation and short-process recovery. Moreover, the separation of Na2MoO4 melt and glassy liquid during the melting process was visually observed online. Therefore, this approach of constructing glass GPE systems for the one-step separation of metals during the melting process is expected to contribute to the sustainable supply of critical metals.
研究领域:
材料科学
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环境科学
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冶金工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）