CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhihui Xu,Jing Li,Xiaoling Peng,Shan Tao,Jingcai Xu,Bo Hong,Xinqing Wang
In this study, nano-sized La-doped YIG (Y 3-x La x Fe 5 O 12 , x = 0.00, 0.03, 0.05, 0.08, 0.10, and 0.15) were prepared using a reverse co-precipitation method, which were then combined with FeSiCr powder to create a novel FeSiCr/Y 3-x La x Fe 5 O 12 soft magnetic composite (SMC). X-ray Diffraction (XRD) analysis confirmed the successful incorporation of La into the YIG lattice. Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS) scans demonstrated that a uniform insulating layer of La-doped YIG was effectively coated on the FeSiCr particles. The results revealed that the Y 2.92 La 0.08 Fe 5 O 12 powders showed the highest M s of 22.334 emu/g. Furthermore, the FeSiCr/Y 3-x La x Fe 5 O 12 SMCs exhibited notable improvements both in permeability and core loss with a La doping concentration of x = 0.08 ( P cv = 122.35 mW/cm 3 , μ e = 51.034 at 10 mT and 500 kHz), accompanied by an enhancement of DC bias characteristics. This work optimized the magnetic properties of YIG with La doping and constructed a novel FeSiCr/La-doped YIG SMCs with enhanced high-frequency performance.
研究领域:
材料科学
·
磁学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Biao Ran,Yun Wu,Kaiyang Zhang,Rui Yao,Jinping Li,Guang Liu
In the evolution of proton exchange membrane (PEM) electrolysis, the development of durable electrocatalysts for the acidic oxygen evolution reaction (OER) is crucial. This work introduces an electrocatalyst with a core–shell architecture, consisting of amorphous iridium oxide (IrO x ) supported on lanthanum (La) and niobium (Nb) co-doped titanium dioxide (denoted as La, Nb-TiO 2 @IrO x ). The resultant La, Nb-TiO 2 @IrO x , synthesized via a hydrothermal method, exhibits enhanced OER activity and remarkable durability in acidic media. The theoretical calculations provide insight into the enhanced performance of La, Nb-TiO 2 @IrO x , revealing a narrowed bandgap and improved conductivity due to co-doping. Additionally, there is an increase in charge transfer and binding energy at the heterointerface. As a result, electrochemical evaluations show a significant reduction in overpotential and enhancement in long-term stability, achieving an overpotential of 234 mV at 10 mA cm −2 and maintaining impressive stability for 150 h. These findings underscore the potential of La, Nb-TiO 2 as a robust platform for acidic OER electrocatalysts, offering valuable insights into the design of durable and efficient systems for energy conversion applications and advancing the development of next-generation technologies.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2022
·
IF 6.449
Yan-qing Song,Sonil Nanda,Wen-jie Cong,Jie Sun,Guo-hua Dong,Aneta Magdziarz,Zhen Fang,Ajay K. Dalai,Janusz A. Kozinski
Cotton stalk was gasified to produce H 2 with Ni-La based catalysts in subcritical and supercritical water. Approximately 90% H 2 yield was obtained under optimized conditions (360 °C, 0.5 g Ni-La catalyst loading, 0.5 g biomass and 10 min) by an orthogonal design with Ni-La/spent bleaching clay (SBC) materials. In addition, the H 2 yield of rice and wheat straw increased by 41.5 and 39.5 times, respectively at optimized conditions. It was found that the activity of Ni-La materials supported on SBC ash and Al 2 O 3 was similar, with H 2 yields of 108.3% and 115.1% at 380 °C, respectively in 5 min. SBC ash provided a high specific surface area (94.4 m 2 /g) for the Ni-La catalyst. La-promoted Ni/SBC (0.19 mmol/g) had a stronger acidity than Ni/SBC (0.16 mmol/g). Ni-La/SBC had a broad reduction peak, indicating the uniform dispersion of Ni on the support. Ni-La/SBC materials not only realized the reuse of SBC but also effectively promoted the hydrothermal gasification of agricultural wastes .
研究领域:
能源生物学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Yuhang Xu,Wei Li,Sisi Qin,Kai Su,Junmin Chen,Shengli Zhang
ABSTRACT In this study, La(OH) 3 -loaded Juncus effusus (La-JE) with a three-dimensional structure was prepared via an in-situ precipitation and then wrapped in a cellulose membrane. The La-JE not only avoided the leakage of La(OH) 3 but also was separated from solution easily. The optimal pH for phosphate removal by the La-JE was 6. The removal rate of phosphate was positively correlated with adsorption time, La-JE dosage and reaction temperature, and negatively correlated with phosphate concentration. The adsorption process conformed to pseudo-second-order kinetic model and was better fit by Freundlich model. At 25°C, the maximum adsorption capacity of the La-JE was 22.75 mg·P/g. The influence of SO 4 2– , Cl – , NO 3 – , NH 4 + , HCO 3 – and CO 3 2– on phosphate removal was negligible, suggesting that the La-JE had good anti-interference ability. Mechanism analysis showed that the removal process of phosphate was related to both ligand exchange and surface precipitation. The application in real water environment exhibited that the La-JE had good potential for advanced dephosphorization of sewage treatment plant and natural waterbody remediation.
研究领域:
环境科学
·
水处理技术
✓ 已验证
DOI
高影响因子
Chemical Physics Impact
·
2024
·
IF 3.8
Mingzhang Liang,Anze Shui,Mei Cai,Hulei Yu
Semiconductor photocatalysis is an efficient technique to degrade the pollutants from wastewater. Herein, the doping of elements and the construction of heterojunctions are used to expand the visible light region and improve the transfer of photogenerated electrons-holes. The La-ZnO/BiOCl (LZB) heterojunction has been synthesized via the hydrothermal method. Furthermore, LZB-0.30 heterojunction is found to possess the optimal photodegradation efficiency of 100 % for RhB solution under the visible light within 45 min. Its degradation rate is ten times faster than that of La-ZnO, owing to positive development of photostimulated charge carriers. In addition, the results demonstrate that LZB-0.30, as an ideal photocatalyst, has great potential applications in the treatment of contaminants, providing a feasible strategy for environmental protection.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Ziwei Gao,Tao Zhang,Md. Nahid Pervez,Guojuan Qu,Wei Jin,Yaping Zhao
Materials combing catalytic and adsorption dual active sites are very important for arsenite (As(III)) due to its high mobility in water. Therefore, in this study, a bifunctional walnut-like Co-doped La(OH) 3 composites (Co-La) with independent catalytic sites and post-formed adsorption sites were synthesized via a simple hydrothermal method. Nearly 100% As(III) removal can be achieved in Co-La and peroxymonosulfate interaction systems (Co-La/PMS) within 10 min at the molar ratio of PMS to As(III) of 1.2. The results indicate that the combined Co-La adsorption system demonstrated superior performance compared to the Co-La adsorption alone. Precisely, the maximum removal capacity of the system was measured at 243.90 mg·g −1 , and the pseudo-first-order kinetic rate constant ( k 1 ) was determined to be 1.0771 min −1 . These values were significantly greater than those observed for Co-La adsorption alone. Notably, the kinetic rate constant was 239 times faster, and the removal capacity was 4.6 times higher in the combined system. The fast kinetics of As(III) elimination can be elucidated by the production of reactive oxygen species (ROS) such as S O 4 · - , •OH, O 2 · - and 1 O 2 , which expedite the conversion of As(III) into arsenate (As(V) in this particular system. Meanwhile, the increase in adsorption capacity is ascribed to the fact that PMS can drive La(OH) 3 of Co-La to transform into transition states La 2 SO 4 (OH) 4 , thus generating a new exchangeable adsorption site for As(V). A fixed membrane reactor assembled with Co-La was utilized to achieve a near-complete removal of As(III) within 3 min. The Co-La/PMS systems demonstrate exceptional effectiveness in eliminating arsenic from water across diverse real-water metrics, offering a unique perspective and technological progress in purifying water contaminated with arsenic.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Xin Chen,Jiahui Wu,Jingyao Zeng,Caiyan Shen,Yuejun Wang,Yangyang Xie,Guorong Hu,Ke Du,Zhongdong Peng,Yanbing Cao
Due to the strong electronegativity of P in the anion group and the strong P─O covalent bond, NFPP exhibits low electronic and ionic conductivity, hindering its rate capability. A doping modification strategy of selecting La 3+ with a large ion radius at Na site has been designed, and the nano-micro architectural Na 4-3x La x □ 2x Fe 3 (PO 4 ) 2 (P 2 O 7 )/C (0≤x≤0.04) cathode material with Na vacancies is successfully synthesized via a scalable preparation route. Introducing positively charged substitutional point defects and charged vacancies through doping La 3+ not only broadens the Na + transport channels but also reduces lattice stress and stabilizes the crystal bulk structure during long-term cycling for La 3+ as pillars. Additionally, high valence La 3+ doping enhances the effective charge carrier concentration and improves material conductivity. Consequently, the kinetic performance of Na + migration is significantly enhanced. The optimal Na 3.91 La 0.03 □ 0.06 Fe 3 (PO 4 ) 2 (P 2 O 7 )/C (NFPP/C-La3) exhibits the best electrochemical performance. The synthesized NFPP/C-La3 exhibits excellent rate performance (99.45 mAh g −1 at 20 C) and long-term cycle stability (92.36% of capacity retention over 1000 cycles at 10 C). These results provide the importance and prospect of the high valence ion doping for NFPP/C with high rate stability.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2021
·
IF 6.057
Jing-Yan Kang,Wei Ha,Yan-Ping Shi
A novel magnetic C 3 N 5 framework material (Fe 3 O 4 /C 3 N 5 ) was developed as a high selectivity extractant for La(III) determination in food samples. The Fe 3 O 4 /C 3 N 5 material was synthesized by thermal deammoniation method and has larger surface area (100.3 m 2 g −1 ) and more effective adsorption sites compared with that of individual C 3 N 5 material (19.4 m 2 g −1 ). It was proved that Fe 3 O 4 /C 3 N 5 material displayed excellent selectivity and adsorption capacity for La(III). In addition, adsorption isotherm and kinetic data indicated that La(III) adsorption based on Fe 3 O 4 /C 3 N 5 material is a monolayer adsorption which is compatible with Langmuir model and follows a pseudo-second-order kinetic equation. By using Fe 3 O 4 /C 3 N 5 material as extractant, an analytical method was established with low limits of detection (3σ, n = 6) of 10.4 μg L −1 , reasonable recoveries ranged from 86% to 106% and good precision with the RSD less than 10.7%. The analytical method was further applied to the determination of trace La(III) in food sample. It evinced that the concentration of La(III) in sea fish is 13.2 μg kg −1 and the content of 138 La is 0.138 μg kg −1 , which is 1.03% of total La(III).
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Jiang-Bo Huo,Kiran Gupta,Changyong Lu,Hans Chr. Bruun Hansen,Ming-Lai Fu
Efficient removal of aqueous arsenic is still a great challenge in particular for producing clean drinking water and for waste water treatment. To this end, a novel magnetic porous Fe-La composite, comprising La 2 O 2 CO 3 and Fe 2 O 3 , was fabricated via a self-sacrificing template method based on bimetallic (Fe, La)-MOFs calcined at 550 °C. Batch adsorption results demonstrated that Fe-LaXY (X and Y represent the feeding mole ratio of Fe and La precursors) exhibited a maximum adsorption capacity of As(V) (241, 251 and 410 mg g −1 for Fe-La51, Fe-La21 and Fe-La11, respectively), and they also showed satisfactory adsorption kinetics, which can be ascribed to a strong coordination between La and arsenate species. Coexisting sorbates including carbonate, silicate, sulfate, and humic acid had a slight influence on adsorption performance of arsenate, while phosphate isostructural to arsenate gave severe interference. More importantly, the Fe-La11 could be easily separated from water due to its magnetism (7.0 emu g −1 ), and it also exhibited excellent recyclability (above 80% of removal efficiency at the fifth cycle) as well as stability in terms of release of Fe and La ions (< 0.5 mg L −1 at pH 4.0–10.0). Based on results from X-ray photoelectron spectroscopy (XPS), Powder X-ray diffraction (PXRD) and Raman spectroscopy, it is demonstrated that ligand exchange of surface hydroxyl groups and the formation of inner-sphere surface complexes are main responsible for the As(V) removal mechanism. Combining the magnetic properties, the absorption properties and the recyclability make Fe-LaXY derived from bimetallic MOFs promising sorbents for arsenate removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2024
·Vol. 333
·期 4
·2195-2206
·
IF 1.5
Li Junze,Zhao Chuang,Guo Wenbin,Gao Yang,Liu Tingting,Zhou Yu,Hou Hongguo,Jiao Caishan,Zhang Meng
Using DMDODGA as the carrier, the transportation and separation behavior of Eu(III) and La(III) were studied using a plate-type supported liquid membrane. La(III) and Eu(III) reach their maximum transport rates at feed phase nitric acid concentrations of 2 and 4 mol/L, which are 72.41 (± 2.12)% and 77.80 (± 2.45)%; Increasing the concentration of NO 3 − in feed phase will promote the transport of both ions. The change of HNO 3 concentration in feed phase had major effect on the separation of Eu(III)/La(III), and the co-transport of Eu(III)/La(III) was observed when the concentration of NO 3 − was 3 mol/L.
研究领域:
化学工程
·
分离科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Chengzuo Gong,Gaoxu Han,Jialin Lin,Qiangfeng Zhang,Binbin Wang,Menghao Yang,Zhenghong Huang,Chunxiao Zhang,Weifeng Wei
O3-type layered oxides hold significant promise as the material for cathodes in sodium-ion batteries for their favorable electrochemical properties, while irreversible structural degradation and harmful phase transitions during cyclic operation limit the practical application of these materials. In this work, we proposed a La3+/Al3+ codoping strategy in O3-Na(Ni1/3Mn1/3Fe1/3)O2 cathode materials and found that batteries with the Na (Ni1/3Mn1/3Fe1/3)0.998La0.001Al0.001O2 (NFM-La/Al) cathodes exhibited not only promoted capacity from 135.80 to 170.42 mAh g–1 at 0.2 C but also significantly enhanced cycling stability, with a 10% improvement in capacity retention compared with NFM cathodes after 300 cycles. Particularly, their rate performance was significantly improved as well. XRD and XPS tests indicated that La could expand the c-axis of NFM due to its larger ionic radius and thus significantly increased Na+ ion diffusion efficiency, and in addition, Al doping could effectively increase the content of Ni2+ and Mn4+ and thus greatly alleviated the negative Jahn–Teller effect caused by Mn3+. Moreover, consistent with XRD analyses, DFT calculations further substantiated the effectiveness of the La/Al codoping strategy by demonstrating the detailed atom substitution mechanism in the NFM crystal lattice. The boosted structure stability and Na+ diffusion kinetics may enhance the potential for practical applications of O3-type oxide cathodes.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jiahao Cui,Xiaolong Gao,Kejing Pang,Wenbing Wu,Mrigendra Kumar Awasthi,Yihua Zhao,Xianqiang Yin
Current single-atom studies in the perdisulfate (PDS) system were focused on transition metals, but researching La-series metals might provide new insights for the efficient utilization of this system. The original structure’s Zn was evaporated at high temperatures, thereby we utilized Zeolitic Imidazolate Frameworks (ZIFs) as a substrate to synthesize a type of La-SACs catalysts. The La single atom in this work was identified to the La-N 4 configuration through La-L3 X-ray edge absorption spectroscopy. Experimental observations in suspension demonstrated that the PDS activation capability of La is on par with, if not superior to, that of transition metals such as Co and Cu. Tetracyclines (10 mg/L) were eliminated within 30 min via La-N-C + PDS systems and the pseudo-first-order was higher than 0.0929 min −1 . The Hydrogen bond between PDS and La-N-C and active electron of d orbital in La atoms had the significant influence on the generation of ROS ( 1 O 2 and •OH). Furthermore, the excellent electron transfer of La-N-C also promoted the activation rate of PDS. The findings of this study indicated that La could play a crucial part in PDS catalyst for degradation of organic pollutes in aquatic environment, providing the new method for exploration of single-atom materials in PDS systems.
研究领域:
环境科学
·
催化材料
·
化学工程
✓ 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）