Surfaces and Interfaces
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2026
·
IF 6
Shan Zhu,Ruifan Liu,Xuebing Wang,Qiang Tian,Jiebiao Li,Minhao Yan,Mark J. Henderson
Mixed-valence uranium oxide particles are immobilized on an electrode surface. • Electrochemical response to oxidation in Cl-SO4-Na type groundwater is investigated. • Power spectral density of time series data reveal a fractal dimension (Df) = 1.6. • Voltage fluctuations are ascribed to uranium dissolution and reprecipitation. An electrode comprising uranium oxide particles doped with lanthanum at the outermost atomic layers was utilized as a surrogate surface for spent nuclear fuel. XPS analysis confirmed the formation of a mixed-valence (La,U)O 2+ x surface with an average uranium oxidation state of +4.78 (U(IV):U(V):U(VI) ≈ 4:3:2). The electrochemical response of a modified electrode to oxidative dissolution by H 2 O 2 (10 -4 mol dm -3 ) in either 3.5 wt. % NaCl solution or Cl-SO 4 -Na type groundwater were studied by open circuit voltage (OCV) measurements and power spectral density analysis. These methods aimed to characterize the electrode surface fingerprint in contact with each electrolyte environment. In the groundwater medium, the OCV time series exhibited a fractal dimension ( D f ) of 1.6. Inductively coupled plasma mass spectrometry (ICP-MS) revealed substantially reduced uranium and lanthanum release in groundwater (U: 160 μg/L; La: 89 μg/L) compared with NaCl solution (U: 749 μg/L; La: 1027 μg/L). The increased complexity of voltage fluctuations observed in groundwater, as evidenced by fractal time series analysis, is attributed to protective mineralization of the particle surfaces by Na and Ca and U ions. Download: Download high-res image (212KB) Download: Download full-size image
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Crystals
·
2026
·Vol. 16
·期 9
·553
·
IF 2.9
Shanquan Deng,Junwei Zhu,Meihua Bian,Xingseng Zhang,Heng Chen,Yuyin He,Jianing Peng
The effects of equimolar La/Ce co-doping (0–0.4 wt.% of each element) on the microstructure, mechanical properties, and electrical conductivity of the Al-0.5Fe (8176) conductor alloy were investigated in the as-cast, cold-drawn, and annealed (300 °C, 2 h) states. La/Ce additions refine the as-cast eutectic cells and modify the detrimental Al13Fe4intermetallic from coarse plate-like to fine spheroidal particles. At 0.3 wt.% La + 0.3 wt.% Ce (0.3LC), the annealed wire reaches a peak elongation of 16.7% (+42.7% relative to the rare-earth-free alloy), while its electrical conductivity rises from 59.87 to 61.81% IACS. The conductivity increase is explained by a solute-scavenging mechanism: La and Ce bind Fe and Si impurities into stable Al-RE intermetallics, reducing solute-induced electron scattering in the α-Al matrix. At the same time, thermally stable Al-RE dispersoids pin subgrain boundaries during annealing, retard recrystallization, and preserve the fine-grained structure that benefits ductility. Both effects originate from the same RE addition. This coupled scavenging–pinning pathway breaks the usual trade-off between conductivity and ductility and defines an optimal composition range for high-performance Al-Fe conductor alloys.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124861
·
IF 7.5
Shuaishuai Zhang,Jun Zhang,Limei Sun,Yulong Feng,Jiaxi Wang,Yiheng Chi,Kunling Jiao,Yao Zhang,Alireza Babaei,Wenyi Tan
Despite the great potential of capacitive deionization (CDI) in low-cost and eco-friendly phosphate wastewater treatment, the insufficient active sites and sluggish electrochemical kinetics of conventional electrode materials severely limit its dephosphorization performance. Herein, a series of La-doped CeO 2 composites were successfully fabricated via a MOF-derived calcination strategy. Moderate La doping induces abundant surface oxygen vacancies and Ce 3 + active sites while maintaining the original rod-like morphology and cubic fluorite structure of CeO 2 . Benefiting from the optimized defect configuration and porous structure, the optimal La 0.5 CeO 2 electrode achieves rapid electron migration and ion transport, and exhibits a high specific capacitance of 42.53 F/g at 2 A/g. Profiting from the excellent electrochemical characteristics, the La 0.5 CeO 2 electrode delivers excellent CDI dephosphorization performance with a high phosphate electrosorption capacity of 11.5 mg P/g at 1.2 V, a superior charge efficiency of 139.45% and a low energy consumption of 0.19 kWh/kg P, and maintains 99.5% of its initial performance after 20 cycling tests. The excellent phosphate removal capability originates from the synergistic effects of electric-field-driven electrostatic adsorption, oxygen vacancy-mediated ligand exchange and strong Ce/La–O–P chemical coordination. This work provides a feasible strategy for the design and fabrication of high-efficiency rare-earth-based electrodes for CDI water purification.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 15
·7078-7089
·
IF 3.925
Meng Li,Yan Li,Yujiao Guo,Junming Guo,Mingwu Xiang,Wei Bai,Xiaofang Liu,Hongli Bai
The spinel LiMn2O4 cathode material provides high energy and low cost, but suffers from poor cycling performance and rate capability owing to Mn dissolution and Jahn–Teller distortion. Herein, our design concept is to combine Ni–La co-doping with the nanoscale truncated octahedron to solve this issue; namely, a novel nano-LiNi0.08La0.01Mn1.91O4 cathode material with a truncated octahedron is fabricated for the first time through a facile and quick solution combustion approach. It is found that the Ni–La dual doping promotes the {111} surface growth in spinel LiMn2O4, which endows the nano-LiNi0.08La0.01Mn1.91O4 sample with the majority of {111} facets for minimal Mn dissolution and a few truncated {100} facets for rapid Li+ ion migration channels, as well as the nanoscale particles facilitating decreased electronic and ionic diffusion paths. In addition, the introduction of Ni–La elements can strengthen the crystal structure stability and restrain the Jahn–Teller effect effectively. Consequently, the nano-LiNi0.08La0.01Mn1.91O4 presents excellent electrochemical properties with high first discharge capacities of 114.9 and 100.4 mA h g−1 at 1C and 5C, respectively. Importantly, at the current rate up to 10C, a capacity retention ratio of 89.0% is acquired after an ultra-long 1000 cycles. The CV and EIS measures manifest that the Ni–La dual doping improves the Li+ ion transport rate and weakens the reaction barrier in the nano-LiNi0.08La0.01Mn1.91O4. This research will be a promising candidate for developing long cycle power lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
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Materials Today Bio
·
2022
·
IF 10.761
Lei Han,Xianzhen Dong,Tong Qiu,Zhaona Dou,Lin Wu,Honglian Dai
Wallerian degeneration after peripheral nerve injury (PNI), that is, the autonomous degeneration of distal axons, leads to an imbalance of iron homeostasis and easily induces oxidative stress caused by iron overload. Inspired by the process of nerve degeneration and regeneration, the design of a functional electrospinning scaffold with iron chelating ability exhibited the importance of reconstructing a suitable microenvironment. Here, an electrospinning scaffold based on deferoxamine and poly(3(S)-methyl-morpholine-2,5-dione -co- lactone) (PDPLA/DFO) was constructed. This work aims to explore the promotion of nerve regeneration by the physiological regulation of the scaffold. In vitro , PDPLA/DFO films mitigated the reduction of glutathione and the inactivation of Glutathione peroxidase 4 caused by iron overload. In addition, they decreased reactive oxygen species, relieve the stress of the endoplasmic reticulum and mitochondria, and reduce cell apoptosis. In vivo , PDPLA/DFO conduits constructed the anti-inflammatory microenvironment and promoted cell survival by alleviating iron overload and organelle stress. In conclusion, PDPLA/DFO guidance conduits targeted the distal iron overload and promoted nerve regeneration. It provides novel ideas for designing nerve conduits targeting the distal microenvironment.
研究领域:
神经科学
·
材料科学
·
再生医学
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xuewen Luo,Cuiting Su,Zihao Chen,Lei Xu,Lin Zhao,Jiawen Zhao,Rongliang Qiu,Zhujian Huang
Direct heterogeneous catalysis is conducted to decontaminate antibiotic polluted water for the first time. Perovskite-structured composites La x Sr (1- x ) CoO 3-δ (LSC) are synthesized by a green mechanical milling method (as it involves no organic solvent, generates no wastewater, and is viable for industrial-scale use) and applied for the efficient catalytic degradation of doxycycline (DC) via singlet oxygen without the addition of chemical reagents or illumination. The oxygen vacancy produced during ball milling stores numerous electrons. These electrons and singlet oxygen exert a synergistic effect on the catalytic reaction, thereby improving the catalytic degradation of DC. LSC can effectively catalyze the degradation of DC in the dark. The total organic carbon removal efficiency reaches 89.64%, indicating that most DC is eventually mineralized to CO 2 and H 2 O. The catalytic degradation of DC follows two principal degradation pathways involving 13 intermediates. Toxicity prediction indicates that the toxicity of the products initially increases and then decreases with the degradation process and that the final products are not toxic. This study not only allows a facile synthesis route for catalyst preparation but also promotes the development of a green method for wastewater treatment.
研究领域:
环境科学
·
材料科学
·
催化化学
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CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Lulu Wang,Beiyue Ma,Xinming Ren,Chao Yu,Chengji Deng,Chunming Liu,Chuanbo Hu
In an attempt to enhance the sintering and mechanical performance of porous cordierite ceramics (Mg 2 Al 4 Si 5 O 18 ) as support materials for vehicle exhaust catalysts, ZrO 2 and M x O y (M = La, Ce, and Nb) were simultaneously introduced into cordierite sintered at 1350 °C for 4 h. Then, the reinforced function of ZrO 2 and M x O y on the properties of porous cordierite ceramics was systematically evaluated, especially for the sample co-doped with ZrO 2 and La 2 O 3 . The results displayed a distinct enhancement in mechanical and thermal performance, and the cold compressive strength increased from 72.74 to 158.59 MPa as well as thermal conductivity ranged from 1.66 to 2.01 W m −1 K −1 , respectively. It is found that ZrO 2 facilitated activation sintering introduced via lattice distortion in cordierite and La 2 O 3 accelerated the formation of cordierite and ZrSiO 4 microcrystalline through the low-temperature liquid phase. The synergic effect between ZrO 2 and La 2 O 3 , therefore, had a significant role in the reinforced mechanical and thermal performance of porous cordierite ceramics. This work not only offers a feasible strengthening strategy, but also expands the possibilities for building high-performance structural and functional ceramics .
研究领域:
材料科学
·
陶瓷工程
·
汽车工程
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Dingping Huang,Yanlin Li,Jia Lei,Xiaofang Feng,Xiaotong Yang,Rong He,Rui Zhang,Hongyuan Wei,Wanjun Mu,Huanhuan Liu,Wenkun Zhu
The selective separation of 90 Sr from its daughter 90 Y is crucial for obtaining carrier-free 90 Y. Herein, we demonstrate a La doping strategy to modulate the microstructure and surface properties of Sb 2 O 5 to enhance the separation performance of Sr/Y. Batch studies show that 7%-LaSb exhibits significantly enhanced separation performance compared to Sb 2 O₅ across a broad range of HNO₃ concentrations, achieving a remarkable separation factor of 3449 for Sr 2+ in 0.3 M HNO₃. The equilibrium isotherms align with the Langmuir model, yielding a maximum Sr 2+ adsorption capacity of 40.82 mg/g for 7%-LaSb. Column experiments further validate the practical efficacy of Sr 2+ separation from Y 3+ -containing streams. Mechanistic studies indicate that the high separation performance is attributed to the changes in surface microenvironment induced by La doping: (i) defect-rich porous pathways for Sr 2+ ion access, (ii) a more electronegative surface for enhanced Sr 2+ attraction, and (iii) abundant active Sb-OH sites for specific ion-exchange. This work provides a promising new adsorbent for the separation of Sr/Y in strong acid environments.
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MINERALS ENGINEERING
·
2022
·
IF 5.479
Lu Xing,Xifei Ma,Kaibo Hu,Hanmeng Yuan,Jia Wei,Hongshuai Gao,Yi Nie
Since neodymium (Nd) has similar physicochemical properties to lanthanum (La), cerium (Ce) and praseodymium (Pr), their efficient separation and purification is very difficult. Three new phosphate-based ionic liquids (ILs): N,N-dimethyloctylamine bis(2-ethylhexyl)phosphate ([N 1,1,8,H ][DEHP]), N,N-dimethyldecylamine bis(2-ethylhexyl)phosphate ([N 1,1,10,H ][DEHP]), N,N-dimethyldodecylamine bis(2-ethylhexyl)phosphate ([N 1,1,12,H ][DEHP]) were synthesized and evaluated for selective separation of Nd(III) from aqueous solution. The influences concentration of Nd(III), phase volume ratio (O/A), cation chain length of ILs, extraction time, extraction temperature, salt concentration, solution acidity have on the performance of ILs for extraction separation of Nd(III) from aqueous solution were systematically investigated. It was found that the extraction efficiency ( E ) of Nd(III) using [N 1,1,8,H ][DEHP] was close to 100% at pH of 4, and that it only required 10 min to reach extraction equilibrium at 303 K. Meanwhile, the separation factors ( β ) values of β Nd/La , β Nd/Ce , β Nd/pr using [N 1,1,8,H ][DEHP] were all higher than 3. The density functional theory (DFT) results indicated that the interaction between [N 1,1,8,H ][DEHP] and Nd were stronger than that between La , Ce and Pr . In addition, almost 100% of Nd(III) could be recycled from the loaded [N 1,1,8,H ][DEHP] phase using 0.16 mol·L −1 hydrochloric acid via one step, and the E of Nd(III) by regenerated [N 1,1,8,H ][DEHP] remained about 97% after eight cycles. Moreover, the extraction mechanism of Nd(III) using [N 1,1,8,H ][DEHP] was complexation mechanism based on infrared spectroscopy and slope analysis. This work furnishes a strategy for selective separation of Nd(III) using phosphate-based ILs without diluent.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Liqiong Wu,Ming Yang,Lifeng Yao,Zhangyang He,Jun-xia Yu,Weiyan Yin,Ru-an Chi
In this study, polyaminophosphoric acid (PA)-functionalized ion-imprinted chitosan (CS) aerogel was fabricated for the first time, exhibiting good antibacterial property for selective La(III) recovery and oil/water separation. The as-prepared PA-CS-IIA-2 shows a remarkable adsorption capacity of 114.6 mg/g toward La(III) and high selectivity in the competitive adsorption systems, which is attributed to its abundant imprinting sites and surface functional groups. Benefiting from the amphiphilic property, the PA-CS-IIA-2 also exhibits an excellent adsorption performance for the extractant, oils, and organic solvents. Besides, the PA-CS-IIA-2 presents excellent regeneration and reusability characteristics. Moreover, compared with CS, the PA-CS-IIA-2 exhibits a significantly improved antibacterial activity originating from the PA component. Most importantly, the PA-CS-IIA-2 aerogel is capable of removing multiple pollutants all together and effectively inhibiting bacteria in the complex wastewater environments. Therefore, this study paves the way for developing high-performance rare-earth capture materials with multiple functions to meet diverse applications.
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ENVIRONMENTAL POLLUTION
·
2023
·
IF 8.9
Jie Liu,Kai Sun,Rui Zhu,Xun Wang,Michael Gatheru Waigi,Shunyao Li
Bisphenol A (BPA) is a ubiquitous endocrine disruptor that poses adverse human health risks. Herein, biotransformation kinetics, products, and mechanisms of BPA undergoing a laccase-producing Trametes hirsuta La-7 metabolism were for the first time reported. Strain La-7 could completely biotransform ≤0.5 mmol·L −1 BPA within 6 d in vivo . Notably, its extracellular crude laccase solution (ECLS) and intracellular homogenized mycelium (HM) only required 6 h to convert 85.71% and 84.24% of 0.5 mmol·L −1 BPA in vitro , respectively. The removal of BPA was noticeably hampered by adding a cytochrome P-450 inhibitor (piperonyl butoxide) in HM, disclosing that cytochrome P-450 monooxygenase participated in BPA oxidation and metabolism. BPA intermediates were elaborately identified by high-resolution mass spectrometry (HRMS) combined with 13 C stable isotope ratios (BPA: 13 C 12 -BPA = 0.25: 0.25, molar concentration). Based on the accurate molecular mass, isotope labeling difference, and relative intensity ratio of product peaks, 6 versatile metabolic mechanisms of BPA, including polymerization, hydroxylation, dehydration, bond cleavage, dehydrogenation , and carboxylation in vivo and in vitro , were confirmed. Germination index values revealed that inoculating strain La-7 in a BPA-contaminated medium presented no phytotoxicity to the germinated radish ( Raphanus sativus L.) seeds. In vivo , Mg 2+ , Fe 2+ , Fe 3+ , and Mn 2+ were conducive to BPA removal, but Cd 2+ and Hg 2+ significantly obstructed BPA elimination. Additionally, strain La-7 also exhibited high-efficiency metabolic ability toward estrone (E1), 17 β -estradiol (E2), and 17 α -ethinylestradiol (EE2), with more than 96.13%, 96.65%, and 100% of E1, E2, and EE2 having been converted, respectively. Our findings provide an environmentally powerful laccase-producing fungus to decontaminate endocrine disruptor-contaminated water matrices by radical polymerization and oxidative decomposition.
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高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Qian Li,Rui Zhong,Xiao Xiao,Jiali Liao,Xuepin Liao,Bi Shi
A high-shielding, low secondary radiation, lightweight, flexible, and wearable X-ray protection material was prepared by coimpregnating La2O3 and Bi2O3 nanoparticles in natural leather (NL) with an additional Bi2O3 coating at the bottom surface of the leather. The prepared Bi28.2@Bi3.48La3.48–NL (28.2 and 3.48 mmol·cm–3 are the loading contents of elements) showed excellent X-ray shielding ability (65–100%) in a wide energy range of 20–120 keV with reduced scattered secondary radiation (30%). The bottom surface coating played a critical role in enhancing the X-ray attenuation and reducing the scattered secondary radiation by reflecting and deflecting incident X-ray photons. Excellent mechanical property with superb bending resistance of the NL matrix was properly maintained, and its tensile strength and tearing load were 15.39 MPa and 25.81 N·mm–1, respectively. This lightweight and wearable high-performance protection material can facilitate safety and comfortability during intensive activities of practitioners in the health care industry.
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