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.
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Qinqin He,Wenhao Lu,Hang Zhou,Xiaonan Ji,Wei Hu,Kuo Pang,Zedong Teng,Xin Zhao,Lintao Wang,Keyu Fan,Feichao Hu,Min Li
Endogenous phosphorus (P) release is one of the key factors leading to eutrophication of water body. Phosphorus in sediments is difficult to be removed or recovered due to its chemical stability and complex morphology. Meanwhile, lanthanide metal organic framework (La-MOF) shows high efficiency in phosphate adsorption, but faces challenges in solid-liquid separation due to its powder form. In this study, the phosphorus solubilizing bacteria (PSB), Leclercia adecarboxylata L1–5, was used to transform some fractions of insoluble phosphorus in sediment into soluble phosphorus, and the La-MOF/Polypropylene (La-MOF/PP) fabric was innovatively prepared for phosphate adsorption. Solvothermal method was used for the preparation of La-MOF/PP fabric and the optimum synthesis time was 12 h. The best effect of phosphate removal was achieved when the La-MOF/PP fabric dosage was 1 g/L and the pH was 7. The regeneration efficiency of the material remained stable after five cycles of adsorption and desorption. Furthermore, the simulation results showed that PSB can release dissolved phosphate up to 5.40 mg P/L from sediment. After coupling with the La-MOF/PP fabric, the concentration of phosphate in the overlying water was significantly reduced to 0.38 mg P/L, which was much lower than that in the CK group (2.4 mg P/L). This study demonstrated that the coupled system of PSB and La-MOF/PP fabric could effectively reduce the sediment phosphate content, mitigate the negative impact of possible release of sediment phosphorus and degradation of the overlying water quality. It provided a promising technique for in-situ remediation of sediment phosphate.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Feng Zhang,Sen Zhang,Xing Liu,Wei Gao,Jun Luo,Yi-fan Pan,Wei-Juan Zheng,Xin Hu,Hong-zhen Lian
Background Glycoproteins are critical in various biological processes and attract lots of attention of researchers. It still remains a challenge to detect glycopeptides by mass spectrometry because of their low abundance with heterogeneity and lability, as well as signal suppression by non-glycopeptides. The boronate affinity-based enrichment is an effective solution for detecting cis -diols-containing compounds including glycopeptides in complex matrices. However, there has not been any report about absolute quantitation of boron in the absorbent materials for glycopeptides, which obstructed the tailored design of boronate affinity materials and deeper understanding of interaction mechanisms. Results This work presents the development of a boronic acid-functionalized magnetic zirconium metal-organic framework (mMOF–AAPBA) with actual boron content for specific capture of glycopeptides. The synthesized nanocomposite could enrich glycopeptides by magnetic solid-phase extraction (MSPE) via the synergistic effect of hydrophilic interaction and boronate affinity. After full characterization including quantitative analysis of boron by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), mMOF–AAPBA was applied as MSPE absorbent to capture glycopeptides. Under the optimized conditions, it could enrich 28 glycopeptides both from horseradish peroxidase and immunoglobulin digests, with a limit of detection of 1 fmol μL −1 coupled with matrix-assisted laser desorption/ionization time of flight mass spectrometry. The boronate affinity absorbent also possessed great ability of anti-interference and good reusability. Furthermore, it possessed high performance in enriching glycopeptides in real samples including human saliva and traditional Chinese medicine injections. Significance In the preparation of the boron-containing nanocomposites, there is a special interest that an accurate protocol was established to assay boron based on LA-ICP-MS assisted by home-made matrix reference substances for the first time. These findings highlight the quantitative boron-containing mMOF–AAPBA as a robust affinity material for glycopeptide enrichment in real biological samples, offering potential applications in glycoproteomics and other cis -diols compound related researches.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Minpeng Lei,Yun Lei,Shiding Wang,Dongfang Yang,Shaoyuan Li,Wenhui Ma
Spent nickel-metal hydride (NiMH) batteries are a significant secondary resource for recovering rare earth elements (REEs), particularly lanthanum (La). However, extracting La from the La 2 O 3 -containing oxide slag generated during pyrometallurgical recycling remains a major challenge. This study proposes a novel approach to address this issue by synergistically extracting La from La 2 O 3 -containing oxide slag while simultaneously upgrading metallurgical-grade silicon (MG-Si, 99.2%) to high-purity Si (99.991%). The process begins with the extraction of La from the La 2 O 3 -containing oxide slag using MG-Si as a reductant, yielding a useful Si-La alloy. This is followed by a three-stage leaching process to further separate the Si-La alloy and purify the Si powder. In the primary leaching stage, the Si-La alloy powder is separated into a La-containing acidic solution and residual Si powder using HCl solution. In the secondary leaching stage, Fe impurities in the residual Si powder are removed using a mixed acids solution of HF and HCl. In the tertiary leaching stage, the Si powder is further purified to 99.991% using HCl. Finally, the La ions in the La-containing acidic solution are selectively precipitated using hydrofluoric acid (HF) and ammonia (NH 3 ·H 2 O), respectively, resulting in high-purity LaF 3 (96.2%) and LaOCl (99.4%). This new method simultaneously recovers La from La 2 O 3 -containing oxide slag and enhances Si purity from 99.2 to 99.991%.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Zhuolin Qing,Qirui Qin,Liangjie Wang,Chunsheng Jiang,Zekun Yang,Yue Liu,Shengli Zhang,Junmin Chen
Layered double hydroxide (LDH) is frequently used for phosphate removal in water, while a desirable LDH adsorbent should have sufficiently high adsorption capacity and selectivity. To enhance the removal performance and selectivity of phosphate by LDH, La-doped layered double hydroxide/biochar (La–MgAl–LDH/BC) was synthesized by using a co-precipitation method. Investigation results showed that lanthanum (La) metal loading can significantly enhance the phosphate adsorption performance of La–MgAl–LDH. Then, the introduction of La–MgAl–LDH into BC improved the adsorption capacity of phosphate by the adsorbent, which is 1.8 times that of pure La–MgAl–LDH. The optimum La to Al molar ratio was 0.2 : 0.8 in La–MgAl–LDH materials, and the La–MgAl–LDH to BC mass ratio was 9.3 : 10. Furthermore, both La–MgAl–LDH and La–MgAl–LDH/BC exhibited an enhanced ability to resist interference from co-existing anions (Cl−, SO42−, NO3− and CO32−) compared to LDH. For batch experiments, the kinetic results indicated that the adsorption process of phosphate by La–MgAl–LDH/BC follows a pseudo-second-order kinetics model, reaching equilibrium quickly within 1 h. Furthermore, film diffusion and intra-particle diffusion simultaneously took place. The maximum monolayer phosphate adsorption capacity of La–MgAl–LDH/BC could reach 249.3 mg PO43− g−1 (513.6 mg PO43− g−1, converting to an equivalent La–MgAl–LDH). After four cycles, La–MgAl–LDH/BC showed good reusability, and over 63.5% of phosphate uptake was retained with minimal metal leaching. Additionally, phosphate could be rapidly removed from actual water and simulated water at low concentrations. The electrostatic attraction, ligand exchange, ion exchange and Lewis acid action jointly facilitate the adsorption of phosphate.
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Materials Today Communications
·
2024
·
IF 3.7
Chunlong Qiu,Haiyang Sun,Yeyang Ni,Zhenjiang Dou,Ming Xia,Zhaoyang Fei,Zhuxiu Zhang,Mifen Cui,Qing Liu,Xu Qiao
The impressive water stability demonstrated by MIL-101(Cr) highlights its considerable potential for the effective elimination of organic contaminants from wastewater. Nevertheless, the limited availability of adsorption sites within MOFs leads to an unsatisfactory capacity for tetracycline (TC) adsorption. In this case, the lanthanum modified MIL-101(Cr) porous adsorbents, termed as nLa-MIL-101(Cr), were successfully synthesized using a post-synthetic modification method. Through various characterization analyses, it was confirmed that lanthanum exists in the form of La(OH) 3 within the adsorbents, and all adsorbents also preserved the original structure as MIL-101(Cr). The results of static adsorption experiments demonstrated that, compared to the original material, the adsorption capacity of 1La-MIL-101(Cr) for TC increased by 3.5 times. Further experiments demonstrated that the adsorbent exhibits remarkable ion interference resistance and cycle stability. Finally, based on X-ray photoelectron spectroscopy, the adsorption mechanism was primarily attributed to the coordination between TC molecules and metals active site, while electrostatic interactions also played a significant role in the process. This study has developed a highly efficient adsorbent for the treatment of TC-contaminated wastewater, which reflects promising practical application prospects.
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高影响因子
Catalysts
·
2025
·Vol. 15
·期 9
·889
·
IF 4
Lijun Xue,Yuxuan Wang,Chenhui Qiu,Hui Wan
Developing highly efficient photocatalysts for CO2reduction remains a great challenge. The large band gap and poor charge carrier dynamics are the major factors limiting the performance of Bi4Ti3O12(BTO). Herein, a series of La-doped Bi4Ti3O12(BLaxTO) nanosheets were synthesized and further modified by NaBH4hydrogenation to create surface defect-rich H-BLaXTO nanosheets. Characterizations and theoretical calculations confirmed that the synergistic effect of La doping and hydrogenation significantly enhanced visible-light absorption, promoted charge separation, and improved the electron reduction capacity. When applied to photocatalytic CO2reduction, the H-BLa0.2TO catalyst achieved a superior CH3OH production rate of 7.90 μmol·g−1·h−1, which is 5.6 times higher than that of pristine Bi4Ti3O12. Moreover, the H-BLa0.2TO catalyst maintained excellent stability over four consecutive cycles. This study offers an integrated strategy for constructing high-performance bismuth-based photocatalysts through elemental doping and defect engineering.
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Materials
·
2024
·Vol. 17
·期 7
·1575
·
IF 3.1
Liliang Chen,Weiguo Li,Xianbo Hou,Gang Feng
Flexible La-doped Sm2Zr2O7/polyurethane (PU) coated leather composites were synthesized using a one-step hydrothermal method, with highly efficient photocatalytic degradation properties by coating the La-doped Sm2Zr2O7/PU emulsion onto the leather and drying it. The phase composition and optical properties of the as-prepared photocatalytic material were systematically characterized. The result revealed that La was doped in Sm2Zr2O7successfully, and the prepared samples still possessed pyrochlore structure. The absorption edge of the prepared samples exhibited a red-shift with the increase in La doping, indicating that La doping could broaden the absorbance range of the La-doped Sm2Zr2O7materials. The catalytic performance of La-doped Sm2Zr2O7/PU composite emulsion coating on the photocatalytic performance of leather was studied with Congo red solution as the target pollutant. The results showed that the best photocatalytic property was found in the 5% La-doped Sm2Zr2O7nanomaterial at a concentration of 3 g/L. The resulting 5% La-doped Sm2Zr2O7nanomaterial exhibited a high specific surface area of 73.5 m2/g. After 40 min of irradiation by a 450 W xenon lamp, the degradation rate of Congo red reached 93%. Moreover, after surface coating, the La-doped Sm2Zr2O7/PU coated leather composites showed obviously improved mechanical properties, as the tensile strength of La-doped Sm2Zr2O7/PU coated leather composites increased from 6.3 to 8.4 MPa. The as-prepared La-doped Sm2Zr2O7/PU coated leather composites with enhanced mechanical properties and highly efficient photocatalytic performance hold promising applications in the treatment of indoor volatile organic compounds.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Lingyu Yu,Long Ma,Na Zhu,Yu Ren
Rare-earth element-based materials have attracted extensive interest due to their effectiveness in phosphate removal. However, there are ongoing challenges related to enhancing the phosphate adsorption capacity and regenerating the lanthanum-based adsorbents. This study focused on the preparation of La-Zr bimetallic modified diatomite composites with different molar ratios using a simple coprecipitation method. These composites were employed as efficient adsorbents for the removal of low-concentration phosphate. After conducting a preliminary assessment of the phosphate adsorption capacities of the synthesized La-Zr bimetallic modified diatomite composites, the composite with the La/Zr molar ratio of 1:1 (designated as La 1 Zr 1 -DE) was selected for further characterization and evaluation. The maximum phosphate adsorption capacity of La 1 Zr 1 -DE, determined using the Langmuir isotherm model, was found to be 116.2 mg P/g. The adsorption process of phosphate by La 1 Zr 1 -DE can be primarily attributed to mechanisms such as ligand exchange, inner-sphere complexation, and surface precipitation. Furthermore, La 1 Zr 1 -DE exhibited excellent selectivity for phosphate and demonstrated good regeneration capabilities. This study offers a comprehensive exploration of the adsorption mechanisms, providing a theoretical basis for the development of more effective and sustainable phosphate adsorbents.
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JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2020
·Vol. 20
·期 2
·779-788
·
IF 1.134
Fan Ji-Min,Lei Yun-Yu,Gu Zhan-Yong,Zhang Bing,Yin Shu,Zhao Zhi-Huan
N and F co-doped La-TiO2 (La-TONF) samples were prepared through the solvothermal method by using HMT and NaF as precursors. The obtained samples were characterized by UV-Vis DRS, XRD, XPS and PL measurements for light-harvesting properties, crystal phase and optical characteristics,
respectively. Interestingly, the TONF sample had a different fluorescence emission intensity than the TON or TOF samples, thus suggesting a clear synergistic effect of N and F co-doping. The optimal doping amount of La was 2 wt.%, and the absorption edge was red-shifted from 453 nm to 464
nm for La-TiO2 and La-TONF. The photocatalytic activity was evaluated by degradation of MO and oxidation of TMB under visible light irradiation. La-TONF exhibited excellent photocatalytic activity and a degradation rate of 92.4%, 4.4 times that of undoped TiO2 (20.8%).
The photocatalytic degradation activity remained above 85.8%, even after five runs. In addition, the MO photodegradation catalyzed by La-TONF followed first order kinetics. According these results, a possible synergistic effect mechanism for the enhanced photocatalytic performance is proposed.
研究领域:
材料科学
·
环境科学
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 25
·44694-44701
·
IF 5.6
Honglei Yuan,Huizhong Ma,Gaoliang Wang,Huanxia Jia,Liwei Wang
This study systematically investigates the structural and luminescent characteristics of LaSc 3 (BO 3 ) 4 :x %Cr 3+ and La (1-y) Gd y Sc 3 (BO 3 ) 4 :1.0 %Cr 3+ phosphors. X-ray diffraction confirms the formation of a pure hunter-type structure for all samples, with Cr 3+ occupying Sc 3+ sites and Gd 3+ substituting La 3+ , inducing lattice contraction. Luminescent analysis reveals that LaSc 3 (BO 3 ) 4 :Cr 3+ exhibits an emission at 980 nm under 430 nm excitation, attributed to the 4 T 2 → 4 A 2 transition of Cr 3+ in a weak crystal field. The substitution of Gd 3+ enhances photoluminescence intensity by 2.15-fold, and blue-shifts emission to 938 nm because of increased crystal field splitting and structural rigidity. The broadened full width at half maximum is also formed due to the enhanced degree of disorder in GdSc 3 (BO 3 ) 4 . Thermal stability studies show that GdSc 3 (BO 3 ) 4 :Cr 3+ retains 49 % intensity at 540 K, outperforming LaSc 3 (BO 3 ) 4 :Cr 3+ (41 %), supported by higher activation energy (ΔE = 0.338 eV vs. 0.296 eV). The improved thermal resistance is linked to lattice rigidity and reduced electron-phonon coupling. NIR-pc-LEDs fabricated with GdSc 3 (BO 3 ) 4 :Cr 3+ demonstrate superior radiant flux (68.7 mW at 200 mA) compared to La-based devices. These results highlight the critical role of host lattice engineering in optimizing Cr 3+ luminescence for high-power NIR applications.
研究领域:
材料科学
·
光学材料
·
固态化学
·
光子学
·
发光材料
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高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 3
·763-772
·
IF 2.5
Jiang Tongzhou,Wu Fei,Ren Yurong,Qiu Jianhua,Chen Zhihui
High-entropy pyrochlore oxide (Y,Dy,Ce,Nd,La) 2 Sn 2 O 7 has been synthesized by the co-precipitation method. EDS and XPS analysis demonstrated the high-entropy structure in M 2 Sn 2 O 7 (M = Y, Dy, Ce, Nd, La) ultrafine powders, which is developed as the active material in lithium anode. The effects of different binders on the cycling performance and rate capability were discussed. Benefiting from the synergistic effects of high-entropy system and the strong intermolecular force provided by the sodium carboxymethyl cellulose (CMC) system, the optimized M 2 Sn 2 O 7 /CMC (M = Y, Dy, Ce, Nd, La) delivers a high initial discharge capacity of about 766 mAh g −1 and exhibits excellent cycle stability. A reversible capacity of 396 mAh g −1 and superior delivering retention of ~ 100% can be obtained at 100 mA g −1 after 100 cycles. Meanwhile, the capacity retention rate of 54.5% can still be reached after the cycling at various current densities from 0.05 to 1 A g −1 , demonstrating potential application prospect of the M 2 Sn 2 O 7 /CMC.
研究领域:
材料科学
·
电化学
·
能源存储
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高影响因子
危险品化学品经营许可证（带存储）