ECOLOGICAL INDICATORS
·
2025
·
IF 7.4
Xin Wang,Yue Ben,Wanxin Liu,Qing Zhou,Lihong Wang,Xiaohua Huang
Rare earth elements (REEs) are a type of frequently reported emerging pollutant that affects plant growth. The harm caused by continuous exposure to low-dose REEs has rarely been studied. Quickly, accurately, and non-invasively monitoring the continuous influence of low-dose REEs on plant growth in situ is key to indicating and warning of its harm to plants and ecosystems. In this study, after continuous exposure to low-dose lanthanum [La(III), a REE] for 14 days, invisible damage occurred in leaf cells, and La accumulated continuously in the soybean plants (leaves > stems > roots > pods > seeds), causing potential human health risks. Two proteins [vitronectin-like protein (VN) and arabinogalactan proteins (AGP)] in leaf cells that bound La(III) were selected as biomarkers, and changes in these two proteins were detected by constructing dual-sensors in living leaf cells after continuous exposure to low-dose La(III) for 14 days. The results showed that the electrochemical outputs from leaf cells–the electron transfer resistance R et (VN) and R et (AGP)–were related to the damage indices such as MDA, chlorophyll content, electrolyte leakage, cell vitality, fresh and dry weight of leaves, and leaf area. Using this output, two warning intervals of visible damage were obtained: R et (VN) was 8.53 %–47.22 %, and R et (AGP) was 12.75 %–51.31 %. This study successfully demonstrated the real-time in situ detection of plant cell biomarker changes and invisible damage under low-dose La(III) exposure, providing methods for early warning monitoring of plant damage caused by low-dose continuous exposure to REEs.
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Catalysts
·
2025
·Vol. 15
·期 8
·759
·
IF 4
Wenbin Qu,Bountheva Louangsouphom,Xiaoling Ye,Huimei Liu,Xin Wang
Integrating photocatalysis with adsorption represents an efficient approach to improving the removal performance of organic contaminants from aqueous environments. To address the issues of severe charge recombination and poor adsorption activity in TiO2photocatalysts during the photocatalytic degradation of organic pollutants. In this study, we used macroporous resin as a carrier and prepared La/N-doped TiO2/macroporous resin composite materials (La/N/TiO2-MAR) via a hydrothermal-assisted sol–gel method. The results show that the composite material has a spherical morphology. N can be doped into the TiO2crystal, while La3+remains on the surface of TiO2without entering the crystal lattice. La/N/TiO2-MAR demonstrates a higher specific surface area and enhanced light absorption capacity, which facilitates both adsorption and photocatalytic degradation. At the La3+doping concentration of 0.05 M, La0.05/N/TiO2-MAR demonstrates optimal photocatalytic degradation performance, achieving an 85.36% removal rate of Rhodamine B after 240 min of visible-light exposure.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Baolai Wang,Kaili Wei,Fuming Chen,Yinzhen Wang,Guannan He,Wei Li,Junming Liu,Qinyu He
It has been found it more difficult in completely degrading A-ring of tetracycline (TC) than completely degrading B-D rings of tetracycline. Thus, it is very necessary to find an effective route to completely degrading A-ring of tetracycline. In this work, a Z-scheme heterojuncted core-shell La(OH) 3 @BaTiO 3 composite (LB) was designed and fabricated through hydrothermal method . Many characterization techniques were employed to investigate the microstructure, phases, composition, energy band structure , and the lifetime of photogenerated carriers. In the mean time, the photocatalytic properties, including the degradation of A-ring and B-D rings of TC, as well as active species during photo-degradation were investigated. It is found that the as-prepared LB has an improved lifetime of photo-produced carriers, as well as high photocatalytic properties, being attributed to the core-shell structured heterojunction La(OH) 3 @BaTiO 3 . In addition, it is also found that ·O 2 − is more effective on degrading A-ring of TC than other active species, likely owed to the PKa3 value (3.3) of A-ring in TC. This work has supplied a route to completely degrading the A-ring of TC: rationally design and prepare a Z-scheme heterojuncted composites which supply very negative conduction band bottom potential.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 30
·期 1
·212-220
·
IF 2.324
Hu Zhen,Zhao Li,Guo Haiyong,Wang Shimin,Li Wenlu,Yang Xiaojie,Dong Binghai,Wan Li
A novel composite double-layer film was developed using TiO 2 /La(OH) 3 :Yb 3+ /Er 3+ nanoparticles (P25/UC) and porous-hollow TiO 2 microspheres (PHTS) for highly efficient dye-sensitized solar cells (DSSCs). P25/UC was used as the first layer and coated onto fluorine-doped tin oxide glass substrate to create a good contact and upconversion effect. The P25/UC layer can absorb and convert infrared light into visible red and green light, increasing light utilization. PHTS has a large size and a high specific surface area, was deposited onto the surface of the P25/UC film to improve the light scattering performance and dye adsorption of solar cells. The P25/UC composite double-layer film (P25/UC + PHTS) achieved the highest short-circuit current density of 20.33 mA/cm 2 and photoelectron conversion efficiency of 8.89% due to the synergistic effect of the upconversion layers and light-scattering layers, which increased by 51.26% and 38.04% compared with that of the pure P25 film photoelectrode.
研究领域:
材料科学
·
能源技术
·
纳米技术
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Zilong Liang,Ping Zhang,Zhiwei Luo,Haijun Zhang,Qian Zhao,Yuchun Zhang
Driven by the urgent demand for efficient CO elimination from fire-derived toxic smoke, CuO coupled with a redox-active CeO₂ support and La promoter has attracted attention as a robust and low-cost composite-oxide catalyst for CO oxidation under harsh conditions. In this study , the effect of La/Ce molar ratios and doping strategies on the structure and catalytic properties of metal-organic framework (MOF)-derived catalysts were systematically investigated, aiming to construct dual-metal synergistic systems with boosted CO oxidation efficiency. By precisely regulating synthesis parameters (temperature, solvent, and precursor concentration), MOF-derived catalysts with tailored crystal frameworks, hierarchical pore structures, and optimized surface chemistry were successfully fabricated. The physicochemical properties and catalytic behaviors were correlated via complementary characterizations, including X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and density functional theory (DFT) calculations were combined to reveal the intrinsic catalytic mechanisms. This integrated strategy clarified how dual-metal synergy governs CO adsorption, activation, and conversion over a broad temperature range. Ultimately, this work provides a rational design strategy for high-performance CO oxidation catalysts and highlights the potential of La-doped MOF-derived CeO₂/CuO catalysts for fire-smoke purification.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 12
·118382
·
IF 6.3
Junli Yan,Guangxu Tian,Hao Guo,Qi Zhu,Tao Zhang,Fuhui Wang
The inner walls of semiconductor processing chambers are susceptible to corrosion and failure under prolonged exposure to harsh environments. Applying protective ceramic coatings can effectively suppress plasma-induced erosion. This work focuses on high-hardness Y 3 Al 5 O 12 (YAG) ceramics. By introducing La–O bonds, the interfacial strength and corrosion resistance of the coatings are enhanced. A low‑temperature co‑precipitation method combined with liquid‑phase coating was employed to fabricate composite powders of (Y 0.7 La 0.3 ) 2 O 3 @Al 2 O 3 (YLAO) and (Y 0.7 La 0.3 ) 2 O 2 F 2 @Al 2 O 3 (YLAFO) for YAG ceramic coatings, effectively suppressing the differential interfacial reactions between Y and La. The YLAFO coatings exhibit a dense microstructure with uniform elemental distribution. Under NF 3 /O 2 /Ar mixed‑plasma etching conditions, the coating shows an etching rate of only 2.81 nm/min, representing an approximately 88% improvement in erosion resistance compared to Y 2 O 3 ‑derived (YO) YAG coatings. This work demonstrates that coating performance can be enhanced through compositional design and process control, providing a feasible solution for protecting semiconductor etching components.
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Journal of Water Process Engineering
·
2026
·
IF 6.6
Muhammad Yawar Younis,Tongyu Wei,Longtao Ren,Safdar Abbas,Wenting Li,Ying Kan,Abdul Hameed Pato,Yun Wei
Novel linker-based La-containing Mg-MOF synthesized for phosphate removal. • Hexagonal rod-like La-containing Mg-MOF provides abundant active adsorption sites. • Ultrahigh phosphate adsorption capacity (448.59 mg g −1 ) via Langmuir model. • La-containing Mg-MOF shows high stability and strong anion resistance. • DFT and polynomial regression-based study of phosphate adsorption. A porous hexagonal rod-like La-containing Mg-MOF was rationally designed and fabricated via a controlled hydrothermal route to achieve efficient phosphate removal from aqueous media. The introduction of La 3+ and Mg 2+ generated a La-containing Mg-MOF with enhanced surface reactivity and abundant adsorption sites. Structural and surface characterization using FTIR, SEM-EDS, BET, and XPS suggested the successful formation of the La-containing Mg-MOF, its mesoporous architecture, and effective integration of both metal sites. Adsorption experiments demonstrated high phosphate uptake, strong selectivity, and stable performance over a broad pH range and in the presence of competing anions. Kinetic analysis indicated that the adsorption process followed pseudo second-order behavior, suggesting surface site-controlled adsorption. Thermodynamic evaluation revealed that phosphate adsorption was spontaneous, endothermic, and entropy-driven. Isotherm modeling showed excellent agreement with the Langmuir model, yielding adsorption capacity of 448.59 mg g −1 . Mechanistic insights derived from density functional theory calculation, FTIR and XPS analyses revealed that phosphate removal occurred through a synergistic combination of outer sphere electrostatic interactions and inner-sphere complexation involving ligand exchange and coordination with La-containing active sites. Furthermore, polynomial regression fitting models were applied to investigate the quantitative relationships between phosphate adsorption capacity and experimental parameters such as pH, initial concentration, contact time, adsorbent dosage, and solution volume, achieving R 2 values above 0.98. These results demonstrate La-containing Mg-MOF are highly promising candidates as next-generation adsorbents for efficient phosphate removal in water treatment systems. Download: Download high-res image (196KB) Download: Download full-size image
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Yiping Feng,Jingyi Wu,Haijian Lu,Wenhao Lao,Hongda Zhan,Longyong Lin,Guoguang Liu,Yirong Deng
The widespread application of rare earth elements (REEs) has raised concerns about their potential release into the environment and subsequent ingestion by humans. Therefore, it is essential to evaluate the cytotoxicity of REEs. Here, we investigated the interactions between three typical REEs (La, Gd, and Yb) ions as well as their nanometer/μm-sized oxides and red blood cells (RBCs), a plausible contact target for nanoparticles when they enter the bloodstream. Hemolysis of REEs at 50–2000 μmol L −1 was examined to simulate their cytotoxicity under medical or occupational exposure. We found that the hemolysis due to the exposure of REEs was highly dependent on their concentration, and the cytotoxicity followed the order of La 3+ > Gd 3+ > Yb 3+ . The cytotoxicity of REE ions (REIs) is higher than REE oxides (REOs), while nanometer-sized REO caused more hemolysis than that μm-sized REO. The production of reactive oxygen species (ROS), ROS quenching experiment, as well as the detection of lipid peroxidation, confirmed that REEs causes cell membrane rupture by ROS-related chemical oxidation. In addition, we found that the formation of a protein corona on REEs increased the steric repulsion between REEs and cell membranes, hence mitigating the cytotoxicity of REEs. The theoretical simulation indicated the favorable interaction of REEs with phospholipids and proteins. Therefore, our findings provide a mechanistic explanation for the cytotoxicity of REEs to RBCs once they have entered the blood circulation system of organisms.
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PubMed
高影响因子
BIOELECTROCHEMISTRY
·
2023
·
IF 5
Qin Xia,Zhaode Mu,Min Qing,Jing Zhou,Lijuan Bai
In recent decades, the incidence of breast cancer has increased year by year, posing a serious threat to human health and quality of life, and about 30% of breast cancer patients have human epidermal growth factor receptor 2 (HER2) overexpression. Therefore, HER2 has become an important biomarker and indicator for the clinical evaluation of breast cancer in diagnosis, prognosis and recurrence. In this work, polyethyleneimine functionalized MoS 2 nanoflowers (PEI-MoS 2 NFs) with good electrical conductivity and abundant active binding sites were designed and employed as a sensing platform for immobilizing the primary antibody of HER2 (Ab 1 ). In addition, a La-MOF-PbO 2 composite with a large specific surface area and good conductivity was used to load lots of electroactive toluidine blue (TB) and the secondary antibody of HER2 (Ab 2 ) via gold nanoparticles (AuNPs) as the linker. Thus, the constructed sandwich-type electrochemical immunosensor was applied for sensitive detection of HER2, which showed a wide linear range from 100 fg mL −1 to 10 μg mL −1 with a lower limit of detection of 15.64 fg mL −1 . Therefore, the resulting immunosensor in this study would have a potential application in clinical bioanalysis.
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PubMed
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Shuangli Li,Yu Zhang,Sen Qiao,Jiti Zhou
Although MIL-101(Fe) has a homogeneous distribution of active metal sites, the relatively low stability of its coordination bonds limits its potential for application, especially in harsh environments. Here, a novel lanthanum-doped MIL-101(Fe)-NH 2 @mesoporous SiO 2 yolk-shell (LMFN-YS) material, synthesized by green water-etching, has effectively improved the adsorption capacity and stability of MIL-101(Fe)-NH 2 . Compared to traditional acid-base etching methods, water etching offered a more co-friendly and cost-effective approach to producing yolk-shell structures. Due to the mesoporous protective shell of mesoporous SiO 2 and more exposed active sites, the yolk-shell materials showed a faster adsorption rate (30 min) and a larger uptake capacity (240.0 mg P/g) than those of MIL-101. The material also exhibited broad range of pH stability from 2 to 10 and displayed good cyclic regeneration ability, with a removal efficiency of 75.9 % after three cycles. Additionally, it demonstrated excellent selectivity towards various coexisting anions such as Cl − , NO 3 − , SO 4 2− , CO 3 2− and HCO 3 − at diverse ionic strengths ranging from 0.001 to 1 M. The superior performance of L 1 MFN-YS (yolk-shell materials of La: Fe = 1:1) was attributed to a combination of factors, including ligand exchange between La(Fe)-OH and phosphates, Lewis acid-base interaction and electrostatic attraction. Additionally, high phosphate removal performance was observed in the real petrochemical wastewater (initial concentrations of 5.48 mg P/g) with a residual effluent concentration of 0.05 mg P/L, which was below the A-level standard of phosphate effluent in China (0.5 mg/L). This work provides a green method for preparing yolk-shell materials with improved ability to treat phosphate wastewater.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Rui Cao,Langlang Wang,Xueqian Wang,Yibing Xie,Xiang Li,Ping Ning
The low-temperature conversion of corrosive carbonyl sulfide (COS) in steel by-product gas is essential for the clean utilization of this gas. Herein, La-Ti@K catalysts doped with La nanoparticles were shown to exhibit significant photopromoted thermocatalytic activity and stability under UV light irradiation. At a reaction temperature of 60 °C, the TOF value increased from 4.84 × 10 -4 s −1 (TiO 2 , thermal treatment) to 8.43 × 10 -4 s −1 (La-Ti@K, photothermal treatment), and the H 2 S selectivity exceeded 99%. This was because La doping increased the density of basic sites on TiO 2 , which promoted the continuous dissociation of H 2 O in the system and the regeneration of –OH under UV irradiation. Moreover, the photogenerated electrons from TiO 2 were transferred to La to maintain the metallic La nanoparticles, as well as to ensure the activation and photothermal hydrolysis of COS. The presence of a suitable electron-metal-support interaction (EMSI) between the electron-rich La nanoparticles and TiO 2 might be responsible for these phenomena. In addition, theoretical calculations revealed that light-induced electron transfer was conducive to H 2 O dissociation and COS activation, while La doping reduced the free energy of the hydrolysis reaction. This work demonstrates the effectiveness of La-Ti@K catalyst in COS photothermal hydrolysis and provides a theoretical basis for further understanding of the photothermal catalytic mechanism.
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JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 37
·17563-17576
·
IF 4.682
He Junjie,He Guo,Wang Panpan,Xu Lurun,Liu Jing,Tao Jingchao
In this work, new high-entropy RE 2 (Ce 0.2 Zr 0.2 Hf 0.2 Sn 0.2 Ti 0.2 ) 2 O 7 (RE 2 HE 2 O 7 , RE = La, Nd, Sm, Eu, Gd, Dy) ceramics were successfully prepared. RE 2 HE 2 O 7 ceramics exhibited a pyrochlore–fluorite dual-phase structure. For Sm 2 HE 2 O 7 ceramic, Ce 4+ with larger ionic radius was enriched in the fluorite phase, Sn 4+ and Ti 4+ with smaller ionic radii were enriched in the pyrochlore phase, while Zr 4+ and Hf 4+ with medium ionic radii existed in both phases. Compared with YSZ materials, RE 2 HE 2 O 7 ceramics exhibited a much lower glass-like thermal conductivity (1.19–1.68 W m −1 K −1 , 100–900 °C) and comparable thermal expansion coefficients (8.67–10.85 × 10 −6 K −1 , 1200 °C). Furthermore, due to grain refinement caused by the competition of two phases, the Vickers hardness (10.29–13.85 GPa) of RE 2 HE 2 O 7 ceramics is improved. The results indicate that dual-phase high-entropy RE 2 HE 2 O 7 ceramics are promising candidate materials for the next generation of thermal barrier coatings.
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