CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Kaiqi Ding,Ying You,Liweng Tang,Xinyue Zhang,Ziyu Qin,Xueqiong Yin
Temperature-sensitive materials are increasingly of deep interest to researchers. Ion imprinting technology is widely used in the field of metal recovery. In order to solve the problem of rare earth metal recovery, we designed a temperature-sensitive dual-imprinted hydrogel adsorption product (CDIH) with chitosan as the matrix, N-isopropylacrylamide as a thermally responsive monomer , and La 3+ and Y 3+ as the co-templates. The reversible thermal sensitivity and ion-imprinted structure were determined by differential scanning calorimetry , Fourier transform infrared spectrometer, Raman spectra , Thermogravimetric analysis , X-ray photoelectron spectroscopy , Scanning electron microscopy and X-ray energy spectroscopy various characterizations and analyses. The simultaneous adsorption amount of CDIH for La 3+ and Y 3+ was 87.04 mg/g and 90.70 mg/g, respectively. The quasi-secondary kinetic model and Freundlich isotherms model well described the adsorption mechanism of CDIH. It's worthy to mention that CDIH could be well regenerated through washing with deionized water at 20 °C, with a desorption rate of 95.29 % for La 3+ and 96.03 % for Y 3+ . And after 10 cycles of reuse, 70 % of the adsorption amount could be maintained, revealing excellent reusability. Furthermore, CDIH expressed better adsorption selectivity to La 3+ and Y 3+ than its non-imprinted counterparts in a solution containing six metal ions .
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
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Xinwei Yang,Dereje Kebebew Debeli,Guorong Shan,Pengju Pan
The increasing use of rare earth elements (REEs) in a wide range of high-tech applications, leading to global ever-increasing demands, has stimulated the development of new technologies for REEs separation and recovery. Herein, an efficient porous graphene oxide/poly ( N -isopropyl acrylamide-maleic acid) [GO/P(NIPAM-MA)] cryogel was synthesized by cryopolymerization and was employed as the REEs recovery adsorbent. The cryogel exhibits stable, microporous interpenetrating structure and thermosensitive characteristics. The adsorption follows the pseudo-second-kinetic model indicating that the adsorption process was controlled by the adsorption sites with the equilibrium adsorption capacity of La 3+ was 33.1 mg/g. The Langmuir isotherm model fits the data better, revealing the homogenous adsorption for REEs on the surface of the adsorbent. Besides, the adsorbent displayed preferential adsorption of La 3+ compared to Cu 2+ , Co 2+ , Ni 2+ , Nd 3+ , Yb 3+ in a binary solution suggested the high level of La 3+ separation efficiency that exceeded 95%. In general, the eco-friendly, sustainability and higher efficiency characteristics of GO/P(NIPAM-MA) cryogel provide a promising route for recycling rare earth elements from wastewater.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Minerals
·
2024
·Vol. 14
·期 6
·560
·
IF 2.2
Lijinhong Huang,Xiangrong Zeng,Chunyan Fan,Lihong Liu,Shafiq Alam,Bin Zeng,Shaomin Liu,Wanfu Huang,Ronghua Shu
It is important to recover La3+from metallurgical solutions or wastewater. However, the recovery rate of La3+is usually less than 1% and the recovery methods are not environmentally friendly or user-friendly. Therefore, a straightforward, efficient, clean, and economically friendly method is needed. In this investigation, a modified adsorbent, COSAC-Na2EDTA-15, which was made from theCamellia oleiferashell (COS) and disodium ethylenediaminetetraacetic acid (Na2EDTA), was invented. In addition, characterization of the COSAC-Na2EDTA-15 adsorbent was conducted using SEM and XPS, and the principle of adsorption was revealed. The adsorption kinetics followed P-S-O KM, while the isotherm of COS-activated carbon (COSAC) aligned more closely with the Langmuir model. Compared to COSAC, the maximum La3+adsorption capacity of COSAC-Na2EDTA-15 increased from 50 to 162.43 mg/g, and the content of O and N changed from 7.31% and 1.48% to 12.64% and 4.15%, respectively. The surface of the COSAC-Na2EDTA-15 exhibited abundant C, N, and O elements, and La3+was detected on the sample surface after adsorption. The test and analysis results fully indicate that La3+can be successfully adsorbed on the surface of COSAC-Na2EDTA-15. Because of its easy preparation, low cost, and superior performance, activated carbon made from COS finds extensive applications in the adsorption and recovery of rare earth elements.
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
RSC Advances
·
2025
·Vol. 15
·期 13
·10164-10169
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IF 4.6
Shuai Han,Yunhan Qin,Dandan Zhang,Cuifang Li,Xiaoxue Du,Lijuan Liu,Songbo Yuan,Fangfang Wei,Baoxin Yang,Zhiying Ma
Red-emissive carbon dots (RCDs) were fabricated using a simple solvothermal method with Nile blue A sulphate and malic acid. The obtained RCDs exhibited good water solubility, excellent stability and a high luminescent quantum yield. The effect of RCDs on the growth of cotton sprouts was further explored, and it was found that the RCDs could effectively promote growth by enhancing root vitality. Furthermore, it was found that adding lanthanum to the RCD solutions could achieve better promotion, with the optimum concentration measured to be 0.02 mg mL−1 of RCDs for mixed solutions, which was much lower than that of the RCD solution alone (0.03 mg mL−1). Further analysis results showed that adding lanthanum could enhance the absorption of RCDs by the cotton sprouts, which might be induced by the enhancement of endocytosis in root cells triggered by lanthanum. This work not only provides novel long-wavelength emissive carbon dots with excellent biological activity but also holds positive significance for plant physiology and agricultural production.
研究领域:
植物学
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农业科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2012
·
IF 3.461
Pengwei Huo,Ziyang Lu,Xinlin Liu,Xiaolin Liu,Xun Gao,Jianming Pan,Di Wu,Jun Ying,Huaming Li,Yongsheng Yan
The molecular/ions surface imprinted TiO 2 /fly-ash cenospheres photocatalyst was prepared by molecular imprinted technology with coordination compounds of La 3+ and oxytetracycline as molecular template. The phase, surface structure and light absorption of as-prepared imprinted photocatalyst were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV–vis diffuse reflectance spectra (UV–vis DRS) and Fourier transform infrared (FT-IR), respectively. The preferentially selected degradation and activity of imprinted photocatalyst were evaluated by degradation of different antibiotic waste water. The results indicate that molecular/ions surface imprinted photocatalyst could preferentially degradate tetracycline antibiotic molecular effectively and enhance the photocatalytic activity. The degradation rate of oxytetracycline ligand molecular could reach 76% in 60 min under visible light irradiation. The relatively coefficient of selectivity degradation on oxytetracycline could reach 4.5146 compared with the ciprofloxacin.
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Mandi Ji,Yunlong Xu,Zhen Zhao,Huang Zhang,Dong Liu,Chongjun Zhao,Xiuzhen Qian,Chunhua Zhao
La 3+ and F − co-doped Li 4 Ti 5 O 12 (LTO) anode materials are synthesized successfully via a solid state reaction. The structure and morphology are characterized by XRD , SEM and EDS . The results indicate that La 3+ and F − ions were uniformly dispersed in Li 4 Ti 5 O 12 lattice without changing the structure and morphology of Li 4 Ti 5 O 12 . Li 3.95 La 0.05 Ti 5 O 11.7 F 0.3 (La005-F03) exhibits an outstanding electrochemical performance among all the samples in a potential range from 0.5 to 2.5 V, and delivers a discharge capacity of 103 mAh g −1 at 10C rate, whereas the LTO only gives 62.5 mAh g −1 . The sample La005-F03 retains a discharge capacity of 170.1 mAh g −1 after 100 cycles at 1C rate. The improved electrochemical performance could be attributed to the appropriate co-doping with La 3+ and F − , which can increase the amount of Ti 3+ /Ti 4+ mixing as charge compensation, leading to the decrease of the charge transfer resistance and improvement of the electronic conductivity and lithium ion diffusion coefficient .
研究领域:
材料科学
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电化学
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储能技术
·
无机化学
✓ 已验证
DOI
高影响因子
VACUUM
·
2026
·
IF 3.9
RuYin Deng,YanShu Huang,Shisong Liu,Jichuan Huo,Yong Cao
In this study, to our knowledge, this is the first systematic demonstration of a room-temperature to 200 °C PTCR window in La-doped LiTaO 3 with grain-boundary-dominated barriers. The results show that the solubility of La in LiTaO 3 was less than 15wt.%, and the La contents would affect the microstructure as well the electrical conductivity of LiTaO 3 . For the LiTaO 3 -based materials with/without La doping, the materials exhibit the PTCR jump (log (R max / R min )) of 2.6∼3.6 between room temperature and ∼200 °C, and varied with La contents. By combining impedance spectroscopy and time relaxation techniques, the complex impedance response of LiTaO 3 -based ceramic materials was analyzed, revealing multiple grain boundary resistances corresponding to relaxation processes with distinct time constants (τ) were the origin of the PTC effect.
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产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 6
·062511
·
IF 4.316
Da-Wei Yang,Shi-Lin Jiang,Ya-Lan Liu,Tai-Qi Yin,Mei Li,Lin Wang,Wan Luo,Zhi-Fang Chai,Wei-Qun Shi
Studying the electrodeposition mechanism of La3+ in LiCl-KCl salt is extremely important for understanding the main characteristics of the deposition of An/Ln in the pyrochemical reprocessing of spent nuclear fuels. In this work, cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and Tafel methods were employed to investigate the electrodeposition mechanism and kinetic processes of La3+ on Al, Ga and Al-Ga alloy cathodes in LiCl-KCl eutectic salt at the temperature range of 723−873 K. The EIS spectra were measured by applying a minimum overpotential near the equilibrium potential, and the suitable equivalent circuits were fitted. The values of exchange current density (i0) calculated by EIS ranged from 0.078 to 0.42 A cm−2. Finally, Al2Ga2La ternary and Al3La, Ga6La binary alloys were obtained by the potentiostatic electrolysis, which were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS).
研究领域:
材料科学
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电化学工程
·
核能技术
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Yan Feng,Weitong Liu,Chengzhi Wang,Su Sun,Shuo Zhang,Yuxi Liu,Juan Tan
The sustainable management of phosphorus, a vital yet scarce resource, is severely challenged by its excessive discharge into water bodies, which causes eutrophication. Achieving ultralow phosphate concentrations while enabling efficient recovery demands advanced materials that transcend the capacity and functionality limits of conventional adsorbents. Herein, we report a rationally designed MnLa-layered double hydroxide (LDH) with synergistic redox-acid bifunctional sites for self-regenerative phosphate capture and recovery. This material achieves an exceptional adsorption capacity of 108.87 mg P/g and reduces phosphate to trace levels below 0.012 mg/L, surpassing stringent eutrophication thresholds. Crucially, the MnLa-LDH exhibits self-enhanced functionality: the La 3+ acid sites provide strong Lewis acidity for specific inner-sphere complexation, while the adjacent Mn 2+ /Mn 3+ redox couples act as a molecular engine to dynamically regenerate surface hydroxyl groups, sustaining high activity over multiple cycles. Systematic characterization confirms that phosphate uptake triggers a dynamic structural self-optimization, remarkably increasing the specific surface area by 112.6 %. The material demonstrates broad pH adaptability, high selectivity, and outstanding reusability (87.5 % capacity retention after 10 cycles) with 92.3 % phosphate recovery. This work provides a novel design paradigm for smart environmental functional materials based on synergistic site engineering, paving the way for sustainable water treatment and closed-loop resource circulation.
研究领域:
环境化学
·
材料科学
·
水处理
·
资源循环
·
吸附科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Chen Shen,Qifang He,Chao Zhong,Hongwei Zhao,Jia Chen,Hongdeng Qiu
Lanthanum (La), as a core and widely applied light rare earth element, possesses irreplaceable strategic value in key technological fields such as permanent magnets, catalysis, and optics. However, its green and efficient separation and purification remain significant challenges. In this study, sulfonated magnetic polymer microspheres (Fe 3 O 4 @PGMA-DVB-SO 3 H) were successfully synthesized for the first time through a simultaneous seed swelling polymerization strategy followed by sulfonation. Oleic acid-modified Fe 3 O 4 nanoparticles were successfully encapsulated within a crosslinked poly(glycidyl methacrylate-divinylbenzene) (PGMA-DVB) matrix, resulting in microspheres with uniform morphology, excellent dispersibility, and strong magnetic separability. The introduction of –SO 3 H groups provided abundant active sites, thereby enabling high selectivity for La 3+ over other competing rare earth ions, with the separation factor between La 3+ and Lu 3+ increasing progressively as sample concentration increased. Adsorption experiments revealed a maximum La 3+ adsorption capacity of 51.3 mg/g at pH 4.0 and room temperature, with the process following pseudo-second-order kinetics and exhibiting Langmuir-type isotherm behavior. Thermodynamic analysis indicated that the adsorption was spontaneous and endothermic. After five consecutive adsorption-desorption cycles, the adsorption efficiency of the magnetic nanospheres remained as high as 85%. FT-IR, XPS, and SEM-EDS characterizations, combined with density functional theory (DFT) calculations, revealed that the Fe 3 O 4 @PGMA-DVB-SO 3 H microspheres exhibited significant selectivity for La 3+ , which was primarily governed by stable electrostatic interactions and multi-site coordination between La 3+ ions and surface functional groups. This study presents a novel and scalable strategy for constructing green, efficient, and reusable magnetic functional adsorption materials with high selectivity toward the light rare earth element La.
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DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2025
·
IF 4.7
Wenbin Zhao,Jinhuai Hua,Yi Cao,Rui Yao,Yanshuo Li
A microwave-assisted solvothermal method was developed to achieve La 3+ exchange in NaA zeolite membranes for enhanced ethanol dehydration via pervaporation. Traditional ion-exchange processes are time-consuming and risk structural degradation, whereas the proposed approach utilizes alcohol-based solvents under microwave irradiation to accelerate ion exchange while preserving membrane integrity. By optimizing solvent selection (isopropanol) and La 3+ concentration (0.04–0.05 mol L −1 ), the modified La-LTA membrane exhibited simultaneous improvements in water flux (up to 12.78 % increase) and separation factor (up to 227 % enhancement), particularly in low-water-content systems. Characterization via SEM, XRD, and XPS confirmed retained crystallinity and successful La 3+ incorporation (35.42 % exchange degree). The method's universality was validated by exchanging other ions (Li + , Cu 2+ , Nd 3+ ), with Li-LTA and Nd-LTA membranes also showing dual performance enhancements. This work provides an energy-efficient, scalable strategy to tailor zeolite membranes for industrial dehydration applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2018
·
IF 2.21
Siliang Chen,Lingxia Li,Shihui Yu,Haoran Zheng,Zheng Sun,Weijia Luo
Inequivalent La 3+ is firstly utilized to modify the microwave dielectric properties in SrTiO 3 ceramic system. For the general composition of Sr 1-x La 2x/3 TiO 3 (0 ≤ x ≤ 1), the effects of La 3+ introduction on the phase transition and structural changes are systematically investigated. The correlation between A-site ordering degree and dielectric loss in microwave range is established, and the temperature coefficient of resonant frequency is also dramatically improved. When x = 0.945, excellent dielectric properties of ε r ∼89.3, Qf ∼15243 GHz (@4.3 GHz) and τ f ∼ 160 ppm/°C are obtained, making it potential to meet the application requirements of 5G technologies.
研究领域:
材料科学
·
电子工程
✓ 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）