BIOSENSORS & BIOELECTRONICS
·
2016
·
IF 7.476
Dawei Fan,Xiang Ren,Haoyuan Wang,Dan Wu,Di Zhao,Yucheng Chen,Qin Wei,Bin Du
A novel and sensitive sandwich-type photoelectrochemical (PEC) sensor was fabricated using signal amplification strategy for the quantitative detection of the prostate specific antigen (PSA). CdSe nanoparticles (NPs) sensitized lanthanum-doped titanium dioxide (La-TiO 2 ) composites were used to bind the primary antibodies (Ab 1 ). The doping of lanthanum promoted the visible light absorption of TiO 2 and remarkably enhanced the photocurrent . Moreover, 0.3%La-TiO 2 displayed the highest photocurrent in the La-TiO 2 composites, which was twice as much as that of undoped TiO 2 . Carboxyl modified CdSe NPs were assembled onto La-TiO 2 composites via the dentate binding between –COOH and Ti atom in TiO 2 NPs, which dramatically promoted the photocurrent intensity by approximately 2.1 times. Carboxyl functionalized polystyrene (PS) microspheres were coated with the secondary antibodies (Ab 2 ). Owing to the better insulation property and steric hindrance of the prepared polystyrene@Ab 2 (PS@Ab 2 ) composites, the significant reduction of the photocurrent signal was achieved after the specific immune recognition. Under the optimum experimental conditions, the fabricated PEC sensor realized ultrasensitive detection of PSA in the range of 0.05–100 pg mL −1 with a detection limit of 17 fg mL −1 . Moreover, this well-designed PEC immunoassay exhibited ideal reproducibility, stability, and selectivity, which is a promising platform for the detection of other important tumor targets.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Zhenyu Zhang,Ning Wang,Xingzi Wang,Zheng Zhao,Chen Dong,Xianmin Tan,Yuanyuan Zheng,Zongyu Feng,Xiangxi Zhong,Juanyu Yang,Xiaowei Huang
With the linewidth of integrated circuits has progressively narrowed, imposing higher demands on the chemical mechanical polishing (CMP) process. Cerium oxide nanoparticles are widely used as abrasives in CMP, with their physical structure and the surface content of Ce 3+ ions and oxygen vacancies directly affecting their CMP performance. Here in, we synthesized La/Pr/Nd doped CeO 2 with the porous self-assembled spherical structures. Doping with La/Pr/Nd reduced the grain size of cerium oxide, increased its specific surface area, decreased the pore size, and increased the pore volume. HR-TEM analysis shows that the porous self-assembled spherical CeO 2 primarily exposes the (111) crystal facet. Additionally, the density functional theory (DFT) calculation, XPS, H 2 -TPR and XANES analyses shown that doping of La/Pr/Nd facilitated the formation of oxygen vacancies and increased the Ce 3+ content on the (111) crystal facet of the CeO 2 . La atoms are more likely to stabilize on the CeO 2 (111) surface compared to Pr and Nd atoms. The CMP results indicated that, The La-CeO 2 exhibited a higher MRR of 338 ± 7.54 nm/min, which is a 35 % increase compared to p-CeO 2 , and achieved superior surface roughness ( Ra = 0.201 ± 0.010 nm).
研究领域:
材料科学
·
纳米技术
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高影响因子
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
·
2024
·
IF 2.7
Xiuhong Liao,Tao Chen,Tao Luo,Yue Cai,Wen Zhang,Zuowei Yin,Zhaochu Hu
Tourmaline serves as a vital recorder of geological processes. However, suitable tourmaline reference materials (RMs) for elemental and stable isotopic composition in situ measurements are still limited. In this study, three tourmaline megacrysts (MD-B66, IM-B232 and BR-DG68) were characterised as potential RMs for B isotope measurements by LA-MC-ICP-MS and mass fraction determinations by LA-ICP-MS. Over 251 measurements with LA-MC-ICP-MS on ten randomly selected fragments from MD-B66 consistently yielded B isotope ratios of -7.74 ± 0.25‰ (2 s ), establishing MD-B66 as a suitably homogeneous primary reference material for high-precision, in situ microbeam B isotope measurements. Notably, the (long-term) intermediate precision of 0.25‰ (2 s ) for in situ B isotope measurements obtained using this reference material is comparable to that reported from solution MC-ICP-MS methods in the literature. Two other tourmaline megacrysts, with intermediate precision ranging from ± 0.48‰ to ± 0.61‰ (2 s ) for δ 11 B measurement, can be employed as secondary RMs for quality control. The mean δ 11 B values determined by solution MC-ICP-MS for MD-B66 (-7.71 ± 0.32‰, n = 12), IM-B232 (-13.17 ± 0.62‰, n = 8) and BR-DG68 (-13.85 ± 0.32‰, n = 12), with expanded uncertainties at the 95% confidence level, are consistent with those determined by LA-MC-ICP-MS. Among these three new RMs, BR-DG68 displays relatively homogeneous major and trace element mass fractions. Characterisation using both in situ and wet chemical techniques demonstrated the suitability of BR-DG68 as the first tourmaline reference material for elemental measurement by LA-ICP-MS, which would permit matrix-matched and therefore more accurate elemental measurement in tourmalines. Unlike electron probe microanalysis with B and Li contents calculated based on stoichiometric assumptions, direct and accurate measurements of the two low atomic number elements, along with other major and trace elements can be achieved by LA-ICP-MS with the aid of the newly developed tourmaline reference material BR-DG68. Overall, current and future studies in geochemistry may benefit from these newly proposed tourmaline RMs, which should lead to significantly improved precision and accuracy for in situ B isotope and elemental measurement.
研究领域:
地质学
·
地球化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
·
IF 8.3
Jing Pan,Yongde Yan,Yanghai Zheng,Shengrong Guo,Xuepeng Wang,Sihao Wang,Zhiguang Du,Kaijie Wang,Yun Xue,Kai Zhu
A method for the preparation of LaNi 5 alloy by molten salt co-reduction is reported. The electrochemical co-reduction process of La(III) and Ni(II) as well as the reaction process of intermetallic compounds formation were investigated. It was confirmed that the diffusion coefficient of La(III) in LiF–CaF 2 molten salt is 4.684–8.098 × 10 −5 cm 2 s −1 at temperatures of 1113–1183 K. And the reaction activation energy was obtained to be 78.86 kJ mol −1 . And, the exchange current densities of La(III)/La(0) were determined by the Tafel (0.149–0.251 A cm −2 ) and linear polarization (0.143–0.204 A cm −2 ) methods. Furthermore, five different La–Ni intermetallic compounds were detected by studying the co-reduction reaction of La(III) and Ni(II) ions. Meanwhile, the formation potentials of La–Ni intermetallic compounds were defined by various electrochemical tests. In addition, the LaNi 5 alloy was obtained via potentiostatic electrolysis according to the electrochemical results. This study provides new insights into the electrochemistry of the LiF–CaF 2 –LaF 3 –NiF 2 molten salt and enhances the understanding of the molten salt electrolytic preparation of La–Ni alloys from co-reduction.
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产品关联
DOI
高影响因子
Materials
·
2026
·Vol. 19
·期 12
·2556
·
IF 3.7
Xue Yang,Shirong Yang,Dongbao Song,Hongtao Zhang,Junfeng Li,Pu Wang
HighlightsS, N co-regulated La2O2S/g-C3N4-derived carbon electrodes were successfully fabricated via thiourea-assisted carbonization of La-BDC-140.La-CNS3achieved a high fluoride removal capacity of 195 mg·g−1at an initial fluoride concentration of 100 mg·L−1.Reverse-voltage regeneration enabled reversible fluoride (F−) electrosorption without chemicals.What are the main findings?Under electric-field stimulation, the electrode exhibited excellent reversible adsorption/desorption, with a regeneration efficiency of F−exceeding 70%.Mechanistic analyses revealed that fluoride removal is mainly governed by La-F coordination, surface hydroxyl/water ligand exchange, and interfacial charge redistribution.DFT calculations further confirmed that the La2O2S/g-C3N4structure provides a favorable balance between fluoride adsorption strength and desorption reversibility.What are the implications of the main findings?These findings demonstrate that S, N co-regulation is an effective strategy to address the regeneration limitations of conventional La-based defluoridation materials.The La2O2S/g-C3N4-derived carbon electrode enables high-capacity, selective, and electrically regenerable fluoride removal in capacitive deionization (CDI) systems.This work provides a theoretical basis for designing sustainable rare-earth-based electrodes with balanced fluoride adsorption strength and desorption reversibility.La-MOFs exhibit strong affinity toward anions such as F−and phosphate. However, conventional La-MOFs show limited regeneration performance when used as CDI electrodes, posing a major challenge for practical applications. In this study, a high-performance sulfur and nitrogen co-doped La-BDC-140-derived carbon electrode (La-CNS3) was fabricated via a coupled carbonization and doping strategy. The optimized La-CNS3electrode possessed abundant defects, a mesoporous structure, favorable hydrophilicity, and rapid charge-transfer capability, which collectively enhanced fluoride electrosorption. At 1.4 V, La-CNS3achieved a fluoride removal capacity of 31.86 mg·g−1for 10 mg·L−1F−solution and up to 195 mg·g−1at an initial F−concentration of 100 mg·L−1. More importantly, partial fluoride desorption was realized solely under reverse voltage, and the electrode maintained favorable defluoridation performance over 50 adsorption–desorption cycles. In actual groundwater treatment, the effluent fluoride concentration decreased to below 1.0 mg·L−1after 120 min. XPS analysis and DFT calculations revealed that fluoride removal was mainly governed by La-F coordination, surface hydroxyl/water ligand exchange, and interfacial charge redistribution. The La2O2S/g-C3N4structure provided a favorable balance between fluoride adsorption strength and desorption reversibility. This work offers a promising strategy for designing efficient, selective, and electrically regenerable rare-earth-based CDI electrodes for fluoride-contaminated water treatment.
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DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·Vol. 14
·期 35
·15530-15540
·
IF 7.6
Liu Jinpeng,Deng Runze,Mai Songlang,Zou Yuanhua,Marwat Mohsin Ali,Wang Junya,Tran Nguyen-Minh-An,Zhu Hanfei,Zhang Haibo,Tan Hua
Dielectric thin film capacitors are characterized by high energy density, rapid charge-discharge, high usable efficiency, and high breakdown field strength, and are widely used in electronics and novel energy technologies. To address the trade-off among polarization, efficiency, and breakdown strength in traditional single-layer dielectric capacitors, this study employs a low-cost sol-gel method to synthesize a BTO/PLCT/BTO sandwich structure film. By optimizing the annealing process, an amorphous/ferroelectric/amorphous multilayer phase structure coexistence was achieved. With increasing annealing temperature, the polarized nanoregions within the amorphous BTO layer expand, while the PLCT layer crystallizes into a ferroelectric phase. At 600 ° C, the synergistic amorphous/ferroelectric/amorphous phase effect is optimized, yielding an energy storage density of 80 J/cm 3 and an efficiency of 86% under an electric field of 5.4 MV/cm. Meanwhile, from room temperature to 150 ° C, the film achieves excellent dielectric and energy storage stability over a wide temperature range (variation rates of dielectric property and energy storage performance below 5%). After 10 9 fatigue cycles, the film still maintains the stability of its electrical performance (variation rate of Δ W rec /Δ W rec-initial ≤ 4%). This amorphous/ferroelectric/amorphous composite film overcomes the trade-off among polarization, usable efficiency, and breakdown strength inherent in single-phase materials, providing a viable strategy for fabricating high-stability energy storage films.
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Ruopeng Zhao,Zhangyong Wu,Dong Chen,Yineng Shen,Xuhui Qin,Meiyan Zhao,Lu Yan,Yong Liu
Rare-earth materials are commonly described as “industrial vitamins” since they are mainly employed as structural or electronic modifiers rather than as direct catalytic centers. This is because their highly shielded 4f electrons prevent them from effectively participating in interfacial charge transfer. In this work, we break this long-standing limitation by engineering atomically dispersed lanthanum (La) on nitrogen-doped carbon (NC), where it is stabilized in a La-N4 coordination environment to form a new material denoted as La-NC. The resulting La-NC electrode functions as a highly active single-atom electrochemical sensing platform, enabling the selective and simultaneous detection of ascorbic acid, dopamine, and uric acid in tear fluid. Synchrotron X-ray absorption spectroscopy and aberration-corrected electron microscopy confirm the formation of isolated La single atoms with a well-defined La-N4 configuration. Density functional theory calculations reveal that the La-N4 sites circumvent 4f-electron shielding by promoting molecular adsorption. This facilitates interfacial charge transfer, thereby accounting for the observed electrochemical activity and molecular discrimination. This work identifies rare-earth single-atom sites as intrinsically active electrochemical centers, making them beneficial for use as biosensors in multicomponent environments such as tear fluid.
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DOI
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2026
·
IF 8.2
Xiaoli Guo,Zhuguang Nie,Xiaonan Yang,Jinqiu Chen,Jiahui Chen,Rumin Wang,Shuhua Qi
Electromagnetic wave (EMW) absorbing materials play a vital role in mitigating electromagnetic pollution and advancing stealth and protection technologies. In this study, flake-like transition metal molybdates (RMoO 4 , R=Ni, Co) were loaded onto a three-dimensional N-doped hollow carbon foam (NCF) to construct electromagnetic wave absorbing (EMA) composite materials. Combining density functional theory (DFT) calculations with CST simulations shows that La doping can enriches Ni 3+ /Co 3+ and create charge inhomogeneity with local dipoles, thereby enhancing dielectric loss. It also reduces the density of states near the Fermi level, suppresses continuous conductive pathways, and improves impedance matching. At a low filler loading (4 wt%), La-doped CoMoO 4 /NCF (LCM/NCF), exhibited extremely low reflection loss (−52.40 dB) and broad effective absorption bandwidth (6.08 GHz). Notably, under near infrared irradiation, the surface temperature of the composite can rapidly rise to above 125 °C within 24 s. In simulated seawater, LCM/NCF exhibits outstanding corrosion resistance. This work provides an innovative strategy for designing lightweight, high-efficiency electromagnetic wave absorbers.
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高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Hui Zhou,Bingxin Zhu,Xiang Li,Baolei Liu,Zhigang Liu,Shihua Yu
To recover the high value-added pharmaceutical intermediate tenofovir from wastewater efficiently and conveniently, a tailored magnetic composites of Fe 3 O 4 @SiO 2 @La(OH) 3 have been prepared via solvothermal and in-situ reduction methods. It exhibits the ability to remove tenofovir with high efficiency and easily separated from matrix. Batch sorption experiments demonstrated that Fe 3 O 4 @SiO 2 @La(OH) 3 can remove tenofovir with the maximum adsorption capacity of 64.53 mg/g, the largest removal of 93.07%, and fast equilibrium time of 5 min. The kinetics of tenofovir adsorption on the magnetic composite is in line with the pseudo-second-order model, while the isotherm is fitted well by the Langmuir model, and thermodynamic parameters represent that adsorption process is spontaneous and endothermic. Moreover, the saturated Fe 3 O 4 @SiO 2 @La(OH) 3 have been desorbed by mechanical stirring with the high desorption rate of 93.02%, and the adsorption capacity maintaining 47.72 mg/g after five cycles. Importantly, the composites can be used for tenofovir removal from crude extracts of pharmaceutical wastewater, with an adsorption capacity of 51.61mg/g in 5 min. Finally, the adsorption mechanisms are explored by pH experimental evidence and XPS analysis, which show that mainly involve electrostatic attraction and the inner-sphere complexation between La(OH) 3 and phosphate groups of tenofovir via ligand exchange. All the results prove that the proposed tenofovir recovery technique, providing new ideas for the recovery of high value-added substances and waste resources rationalization of the application of development. A magnetic Fe 3 O 4 @SiO 2 @La(OH) 3 was synthesized and realized the recovery of tenofovir with high economic value in pharmaceutical wastewater crude extracts. Download: Download high-res image (249KB) Download: Download full-size image
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Xuewei Ba,Xinyu Han,Wenping Huang,Yuhong Ge,Qiran Wen,Yan Yu,Deqing Zhang,Li Li
Sr 2 (Y, La)NbO 6 :Dy blue-white phosphors were prepared by high-temperature solid-state method. The effects of substitution on the crystal structure, photoluminescence properties, and thermal stability were investigated by XRD, SEM, EDS, XPS, diffuse reflectance spectroscopy, and photoluminescence spectroscopy. Phase analysis indicates that the crystal structure of the host materials is not altered by the introduction of Dy 3+ ion, but transfers from monoclinic to cubic system by substituting Y 3+ ions with La 3+ ions. Morphological analysis reveals that the phosphors exhibit irregular shapes with the particle diameters ranging from 10 μm to 20 μm. The blue shift appears in the charge transfer band with the increase of La 3+ ion dosage. Sr 2 (Y, La)NbO 6 :Dy phosphors can be excited by near-ultraviolet and blue light. The emission spectra exhibit two characteristic peaks at 488 nm and 580 nm, corresponding to the 4 F 9/2 → 6 H 15/2 and 4 F 9/2 → 6 H 13/2 optical transitions of Dy 3+ ions, respectively. The emission intensity and the fluorescence lifetime are enhanced by the replacement of Y 3+ ions with La 3+ ions. The Sr 2 LaNbO 6 :Dy phosphor possesses excellent thermal stability. The luminescent intensity at 423 K retains 83% of the value at room temperature. The result indicates that Sr 2 (Y, La)NbO 6 :Dy phosphors have good prospects in solid state lighting.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Kelin Li,She Chen,Mengbo Li,Linlin Liu,Yunjie Li,Feng Wang
Ammonia is a promising carrier for energy storage due to its high hydrogen content, low storage and transportation costs, and zero carbon emissions. Plasma catalysis shows excellent potential for sustainable ammonia synthesis; however, searching for suitable catalysts is ongoing. La(OH) 3 was studied due to its rich basic sites and oxygen vacancies, which are beneficial for plasma-catalyzed ammonia synthesis. The optimal reaction conditions were investigated, and a maximum ammonia synthesis rate of 37.13 μmol/(min•g -cat ) was achieved. H 2 plasma treatment enhanced the catalytic activity of La(OH) 3 , and ammonia synthesis rate of 40.00 μmol/(min•g -cat ) were achieved. This study contributes to the development of efficient catalysts for plasma-catalyzed ammonia synthesis and highlights the potential of La(OH) 3 as a promising catalyst.
研究领域:
化学工程
·
材料科学
·
能源科学
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高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Caiyun Han,Jing Xie,Xize Min
Due to the non-degradable of heavy metal, adsorption has been extensively applied to abatement it. Most studies were focused on uptake metal ions via electrostatic attraction and ion exchange, and load molecule H 3 AsO 4 from strongly acidic wastewater was still challenging. To solve the problem, bimetallic La–Zr MOFs was facilely fabricated in this work, and the fcu topology structure of La-Zr MOFs was remained well under the investigate crystallization time and crystallization temperature. However, the crystallinity of the obtained La-Zr MOFs was influenced by the synthesized factors. The obtained La–Zr MOFs was employed as adsorbent to removal Cr(VI) and As(V), and the performance was evaluated by the batch experiment. The result indicated that the adsorption performance of Cr(VI) and As(V) was positively correlated with the crystallinity , and the optimal sample was 1LaUN 12 . From the XPS characterization, it was found that H 3 AsO 4 was successfully uptake over 1LaUN 12 surface, and the maximum monolayer adsorption capacity was 83.40 mgH 3 AsO 4 /g via ligand exchange and coordination reactions with La−OH and Zr−OH. In addition, the sample 1LaUN 12 also exhibited the excellent Cr(VI) load performance, and the maximum monolayer adsorption capacity of Cr(VI) was 222.5 mg/g. Above 40% Cr(VI) was reduced to Cr(III) by amino groups, and immobilized over the surface of 1LaUN 12 . Eventually, 1LaUN 12 displayed a good structural stability in the acidic medium, which was in favor of removing Cr(VI) and As(V) efficiently from strongly acidic solutions.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
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