NANO
·
2025
·
IF 1.1
Yi Gou,Jinghong Du,Zilong Wang,Shengyang He,Jiahao Lv
La 3+ single-doped and La 3+ -Mo 6+ co-doped TiO 2 nanotubes were synthesized via anodic oxidation combined with a two-step electrochemical process. Their crystalline structure, microstructure, and light absorption properties were characterized using XRD, SEM, and UV-Vis spectroscopy, followed by methylene blue photocatalytic degradation experiments. The results indicate that both La 3+ single-doping and La 3+ -Mo 6+ co-doping can suppress the transformation of the anatase phase to the rutile phase and inhibit grain growth. The diameters of both types of nanotubes range between 60-80 nm, with La and Mo uniformly distributed throughout the nanotubes. Both La 3+ single-doped and La 3+ -Mo 6+ co-doped induced red shifts in the TiO 2 light absorption peaks. The most pronounced red shift in the light absorption band edges occurred at a La 3+ -Mo 6+ ratio of 3:7, reducing the bandgap width to its minimum value of 2.99 eV. Both La 3+ single-doped and La 3+ -Mo 6+ co-doped TiO 2 exhibited first-order photocatalytic degradation of methylene blue. As the La 3+ single-doped concentration increased or the La 3+ -Mo 6+ co-doped ratio varied from 1:9 to 9:1, both the methylene blue degradation rate and photocatalytic reaction rate initially increased before decreasing, while the half-life initially decreased before increasing. At a La 3+ -Mo 6+ co-doped ratio of 3:7, the photocatalytic activity of the TiO 2 nanotubes was optimal, achieving a maximum degradation rate of 89.73% within 8 hours-a 52% improvement over pure TiO 2 nanotubes.
研究领域:
材料科学
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光催化
·
纳米技术
·
环境工程
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DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Lin Yang,Tingjiao Liu,Zheng Li,Changqing Liu,Feifeng Wang,Chunshan Wu
The application of metal organic frameworks (MOFs) for the recovery of low concentrations of rare-earth elements (REEs) has attracted increasing attention due to the precious value of REEs resources. In this study, UiO-66-COOH was modified by trifluoroacetic acid (TFA) to not only promote material crystallization and the pore structure verified by XRD and SEM characterization, but successfully enhance its adsorption capacity and achieve perfect selectivity for Lanthanum ion (La 3+ ). The adsorption capacity for UiO-66-COOH-24TFA was increased by 58% compared to unmodified material. The adsorption mechanism and application were comprehensively investigated. By adsorption kinetics , isotherm and thermodynamic studies, it was found that the adsorption process mainly exhibited monolayer adsorption with spontaneous endothermic-chemisorption characteristics, and –COOH of the modified materials (UiO-66-COOH-24TFA) played an important role, which was confirmed by XPS. Moreover, UiO-66-COOH-24TFA was applied to REEs actual wastewater by successive six-stage adsorption process , where the overall recovery rate on La 3+ reached 94.1% under the coexisting conditions of multiple ions. The application of this acid modified material in the field of the separation and recovery of REEs is of great promise.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
FOOD CONTROL
·
2023
·
IF 6
Yiyi Chen,Yanghong Shen,Yan Zhao,Junli Zhu,Haifeng Wang
A novel fluorescent immunochromatographic assay (ICA) with excellent specificity and sensitivity for evaluating trace residues of zearalenone (ZEN) in cereal samples was successfully developed. La 3+ -doped upconversion nanoparticles (UCNPs) were assessed as antibody labels, following optimization of doping ratios. Our results indicated that 20% La 3+ -doped UCNPs had superior morphological structure and fluorescence characteristics, making them the optimal UCNPs. After labeling 20% La 3+ -doped UCNPs with ZEN monoclonal antibodies (mAbs), optimal polyacrylic acid amount, coupled mAbs amount, detection time, and fluorescent immunoprobe concentrations were determined as 2.0 mL, 20 μg, 10 min, and 8 mg/mL, respectively. Under optimized detection conditions, the limit of detection (LOD) for ZEN standard solutions was 0.25 ng/mL with coefficients of variation (CVs) ＜ 8.67% and a high linear correlation (R 2 = 0.9944). Furthermore, specificity analysis demonstrated that prepared test strips were highly specific for the target mycotoxin . The LODs of ZEN in wheat and maize were both 0.5 μg/kg in spiking recovery experiments, and the recoveries were 87.65%–99.26% and 84.12%–95.12% with the CVs being 1.29%–7.14% and 4.03%–9.01%, respectively, confirming that the optimal UCNPs-ICA was efficient, straightforward, and suitable for rapid on-site screening of ZEN in cereals.
研究领域:
食品安全
·
分析化学
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生物技术
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DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Yuanfu Ma,Chen Wang,Qing Feng
In this study, we aimed to magnetically separate phosphate from natural water and change its source-to-sink conversion to prevent eutrophication. To this end, a promising material in terms of phosphate removal efficiency and magnetic separability was developed. Nine types of magnetic composite P-removal agents were prepared by changing the types of metal salts (i.e., Zn 2+ , Cu 2+ , Mg 2+ , Al 3+ , Fe 3+ , Zr 4+ , Y 3+ , Ce 3+ , and La 3+ ), and the optimal agent was determined to be La 3+ /poly (acrylamide-co-acryloyloxyethyl thimethylammonium chloride)/Fe 3 O 4 [La 3+ /CPAM/Fe 3 O 4 ] based on phosphate removal efficiency. The optimal synthesis conditions, including reaction time (4 h), reaction temperature (65°C), and the content of metal salts (12.96 mmol), were determined. The synthesized material was characterized by transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, and vibrating-sample magnetometry. The results showed that the material featured a core–shell structure and exhibited good magnetic response. The experimental results showed that the removal process was rapid and completed within 20 min. Moreover, the material could greatly reduce P concentration, with phosphate removal efficiency reaching 90.07%. This material could effectively separate phosphate under the action of an external magnetic field and change the source-to-sink conversion of P, thereby preventing the risk of eutrophication.
研究领域:
环境科学
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水处理技术
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材料科学
·
化学工程
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yigui Sun,Chunxiao Lu,Fen Zhao,Shuai Li,Ye Zhao,Xiangyu Yin,Yong Li,Qiwei Zhang
Eu/La co-doped BaMgSiO 4 photochromic ceramics were fabricated via tape casting, which effectively improves the mechanical properties of the material. • The obtained ceramics exhibit high photochromic contrast, stable thermal fading performance and efficient reversible luminescence modulation. • Oxygen vacancies generated by Eu/La co-doping trigger dual-mode photoresponse, enabling multifunctional optical and flexible wearable applications. Inorganic photochromic materials with reversible photoresponse are widely applied in optical anti-counterfeiting, information storage and visual sensing. However, it remains a critical challenge to simultaneously achieve high strength and multimodal photoresponse in a single photochromic system. In this study, Eu 2+ /La 3+ co-doped BaMgSiO 4 photochromic ceramics are fabricated by tape casting. La 3+ doping effectively refines grains and improves density, leading to enhanced mechanical properties with Vickers hardness of 6.62 GPa and fracture toughness of 3.52 MPa·m 1/2 . Optical measurements confirm that the ceramic achieves a photochromic contrast of 80.2% (reflectance at 525 nm) and luminescence modulation of 34.4% (Eu 2+ emission at 443 nm) upon 365 nm irradiation for 4 s, with favorable linear thermal fading behavior. This work develops mechanically enhanced ceramics with dual-mode photochromic response, offering novel technical strategies and theoretical insights for advancing inorganic photochromic ceramics toward practical applications.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhenli Tao,Jiamao Li,Junxian Wang,Yuxuan Ren,Xiangkai Zhu,Yunfeng Guo,Zexing Wang,Wenbo Wang
Novel garnet-structured compounds Ca 3- x La 2 x /3 Co 2 SiV 2 O 12 (0.01 ≤ x ≤ 0.07) were fabricated via the traditional solid state reaction route. Single phase solid solution ceramics with high density were achieved when x = 0.01−0.07, indicating that La 3+ inequivalent substitution for Ca 2+ could significantly stabilize crystal structure and improve microstructure. The La 3+ ions favored occupying the Ca 2+ site, which was confirmed by the X-ray diffraction (XRD) refinement method. Raman spectra revealed that the large differences in ionic radius and ionic polarizability between Ca 2+ and La 3+ strengthened the local distortion of crystal structure. The variation in dielectric constant ( ε r ) was the outcome of the combined action of intrinsic factor (molar volume ionic polarizability) and extrinsic factor (relative density). Oxygen vacancies played a significant role in regulating quality factor ( Q × f ) value as an extrinsic factor. The Full Width at Half Maximum (FWHM) of A 1g , as an intrinsic factor, was also related to the Q × f value. Increasing A-site bond valence was responsible for the reducing temperature coefficient of resonant frequency ( τ f ) due to the increase of lattice stress in ceramics. When x = 0.07, the Ca 3- x La 2 x /3 Co 2 SiV 2 O 12 ceramics exhibited excellent microwave dielectric properties at 1160 °C for 6 h: ε r = 11.50, Q × f = 43,200 GHz, τ f = −37.78 ppm/°C.
研究领域:
材料科学
·
无机化学
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DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2024
·Vol. 54
·期 2
·1021-1028
·
IF 2.2
Yao Zhujun,Jia Qixiang,Xiang Jiayuan,Tu Fangfang,Shi Juntao,Zhang Yuhong,Huang Jianhao,Jiang Yuanyuan,Gong Wei,Yang Donghui
Halides not only possess high ionic conductivity but also exhibit excellent electrochemical stability against high-voltage cathodes, making them promising candidates for solid-state electrolytes in all-solid-state lithium metal batteries (ASSLMBs). Compared with rare-earth halide electrolytes, Li 2 ZrCl 6 electrolytes are less costly. However, they face challenges relating to relatively lower ionic conductivity. Herein, Li 2+ x Zr 1− x La x Cl 6 is synthesized through La 3+ doping in Li 2 ZrCl 6 . The introduction of La 3+ increases the concentration of lithium ions in the crystal and expands the lattice volume, leading to ionic conductivity as high as 8.22 × 10 −4 S cm −1 . When Li 2.1 Zr 0.9 La 0.1 Cl 6 is applied in ASSLMBs (with a LiNi 0.8 Mn 0.1 Co 0.1 O 2 cathode and a Li-In anode), it exhibits superior electrochemical performance, with high initial capacity of 132.5 mA h g −1 , and after 100 cycles at 0.5 C, the battery still maintains a capacity of 72.4 mA h g −1 and high coulombic efficiency of 99.7%. Graphical
研究领域:
材料科学
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电化学
·
储能技术
·
固体离子学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 36
·17358-17366
·
IF 3.925
Xudong Zheng,Ang Li,Jie Hua,Yuzhe Zhang,Jian Rong,Jinfeng Mei,Man Zhou,Zhongyu Li
The vigorous development of rare earth elements has become particularly important for the recycling and reuse of rare earth waste solutions. We use the specific coordination of the phosphate group and La3+ to recover and separate La3+ from secondary resources. First of all, cellulose nanocrystals should be phosphorylated by using phosphoric acid in an aqueous medium. Phosphoric acid groups are introduced to the surface of the cellulose nanocrystal, and then poly-N-isopropylacrylamide is introduced for modification. The purpose is to increase the mechanical properties of the material. The material was characterized by scanning electron microscope, transmission electron microscope, Fourier infrared spectroscopy, N2 adsorption–desorption analysis, and thermogravimetric and static adsorption experiments. The results of the static adsorption experiments show that the maximum adsorption capacity is 92.28 mg g−1 when the pH is 7.0. After recycling the material five times, the material could still have 87.24% of the maximum adsorption capacity.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Yuchen Xie,Shuang Ding,Xuemei Deng,Songlin Tan,Qingming Chen,Yule Li,Hui Zhang
La 3+ doping in Sr 0.725 (Y 1- x La x ) 0.275 CoO 3- δ ceramics eliminates the detrimental Y 2 O 3 secondary phase and triggers a tetragonal (x < 1, I4/mmm ) to cubic (x = 1, Pm-3m ) phase transition. XPS (X-ray Photoelectron Spectroscopy) confirms increased Co 4+ content and reduced oxygen vacancies (oxygen content rises from 2.662 to 2.918). This significantly lowers resistivity due to decreased vacancy scattering and enhanced Co 4+ –O–Co 3+ hole hopping. The temperature coefficient of resistance (TCR) shifts from negative to positive. Critically, the x = 0.025 composition achieves TCR < −3%·K −1 and optimal resistivity within the 230–330 K operational window. This work demonstrates synergistic optimization of high TCR (<-4%·K −1 ), low resistivity, and single-phase stability via La 3+ doping, enhancing its viability for uncooled infrared detectors.
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DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2019
·Vol. 34
·期 12
·2067-2077
·
IF 1.982
Anish Bhattacharya,Yufang Jiang,Qi Gao,Xiangfeng Chu,Yongping Dong,Shiming Liang,Amit K. Chakraborty
La3+-doped BaSnO3 microtubes (La3+–BaSnO3) have been synthesized by electrospinning method, and the influence of La3+ content on the sensing properties of BaSnO3 for detection of formaldehyde vapor has been investigated. The as-prepared materials have been characterized using XRD, SEM, DSC, XPS, and UV-Vis. The La3+–BaSnO3 sample doped with 4 wt% La exhibited a response as high as 220 to formaldehyde vapor (1000 ppm concentration) along with a very low detection limit of 0.1 ppm at 270 °C, whereas at 140 °C, it exhibited a response of 80 and detection limit of 1 ppm. In addition, the sensor showed excellent selectivity of 57 to formaldehyde at 140 °C when compared with other vapors. Further, the sensor also showed good repeatability and stability over a long period of time suggesting its strong potential as a commercial formaldehyde sensor.
研究领域:
材料科学
·
传感器技术
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Chunlei Zhang,Xia Zhu,Chenliang Peng,Chaoyi Guo
The α-zirconium phosphate can act as a potential adsorbent for recycling rare earth ions in tailwater because of the abundant surface -POH groups and the layered structure. The adsorption behaviors and mechanism of rare earth La 3+ on the material were studied through experimental and density functional theory (DFT) calculation methods. The experimental results show that the adsorption process conformed to pseudo-first-order kinetics and Langmuir isotherm model, with the maximum adsorption amount of 37.1 mg⋅g −1 . La 3+ was mainly adsorbed through ion exchange with the proton of surface -POH. The presence of impurity Al 3+ had a great influence on the adsorption of La 3+ on α-ZrP contrary to the case of NH 4 + . DFT calculations further proved that the oxygen of -Zr O P- and -POH acted as adsorption sites of α-ZrP, and the adsorption energies of La 3+ , Al 3+ and NH 4 + were −375.7, −2149.5 and −22.8 kJ⋅mol −1 , respectively, in the order of Al 3+ > La 3+ > NH 4 + , consistent with the experimental results. The partial density of states (PDOS) suggested that the bonding peaks between La 4d and O s 2p orbitals occurred in the energy range of −9 to 0 eV.
研究领域:
化学
·
环境科学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Pengsen Zhao,Haizhong Zheng,Guifa Li,Yongxiang Geng,Yixin Xiao,Hongbo Guo,Ping Peng
The CaO–MgO–Al 2 O 3 –SiO 2 (CMAS) corrosion resistance of La 3+ -Yb 3+ -Ce 4+ co-doped ZrO 2 (LYZC) ceramic was systematically discussed via experiment and first-principles calculation. Results demonstrate that at the CMAS/RE-ZrO 2 interface, RE is dissolved in molten CMAS to form some RE-apatite particles, which effectively inhibits CMAS penetration. Compared with La 3+ doped ZrO 2 (LZ), LYZC owns a better ability to maintain the coating microstructure under CMAS corroded, which is conducive to alleviating CMAS penetration. This conclusion is also confirmed by the low diffusion coefficients ( D ) of RE and Zr in CMAS/LYZC(111), which are only 2.305–5.556 × 10 −8 m/s and 2.694–3.421 × 10 −8 m/s, respectively. Furthermore, the small electrostatic potential difference (Δ V = 1.578–1.654 eV) of the CMAS/LYZC(111) terminal layer suggests that molten CMAS does not easily adhere to the LYZC surface.
研究领域:
材料科学
·
理论计算
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DOI
高影响因子
危险品化学品经营许可证（带存储）