CERAMICS INTERNATIONAL
·
2026
·
IF 6
Wenchao Li,Guitao Deng,Li Wan,Yucheng Liu,Fanrong Ai,Jinhua Hong,Kui Zhou
Lanthanum-doped hydroxyapatite nanowires (La-HAW) were successfully synthesized via a hydrothermal method and integrated into cryogenically 3D-printed chitosan (CS) porous scaffolds. Owing to their enhanced osteogenic activity and inherent antibacterial properties, these scaffolds represent a promising strategy for bone tissue engineering applications. Comprehensive characterization confirmed that the La-HAW possessed high aspect ratios (>1000), uniform elemental distribution, and successful incorporation of La 3+ into the hydroxyapatite lattice via XRD, XPS, and EDS analyses. In vitro biological evaluations revealed that La-HAW significantly promoted the osteogenic differentiation of MC3T3-E1 pre-osteoblasts, evidenced by elevated alkaline phosphatase (ALP) activity and enhanced calcium mineralization, while maintaining excellent biocompatibility. Additionally, La-HAW exhibited strong antibacterial efficacy, with inhibition rates of 90 ± 2% against Escherichia coli and 78 ± 3% against Staphylococcus aureus . When structured into porous chitosan-based scaffolds via cryogenic 3D printing, the resulting CS/La-HAW scaffolds exhibited hierarchical porosity with favorable degradation kinetics, high swelling capacity, and improved cellular adhesion and proliferation. The unique nanowire morphology provided abundant anchoring sites that promoted cell adhesion, spreading, and cytoskeletal extension, synergistically enhancing osteogenic induction. These findings highlight the dual-functional capability of La-HAW based scaffolds, combining enhanced osteogenesis with inherent antibacterial properties, positioning them as a promising platform for bone regeneration.
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DOI
高影响因子
Journal of Water Process Engineering
·
2026
·
IF 6.6
Zengjin Fu,Yan Hao,Tingrui Lin,Huiling Ma,Huazheng Sai,Hui Yang
A novel adsorbent (PHPM) was synthesized through the functionalization of N -(2-Hydroxyethyl) acrylamide (HEAA) with phytic acid (PA) and applied for the adsorption of La(III) and Ce(III) ions. The material was characterized by means of FTIR, TGA, SEM, and XPS. The present study systematically investigated the effects of contact time, adsorbent dosage, initial La(III) or Ce(III) concentration, and pH value on the adsorption capacity. The maximum theoretical adsorption capacities of PHPM for La(III) and Ce(III) were determined to be 198.0 and 186.2 mg·g −1 , respectively. The adsorption process followed the pseudo-second-order kinetic model and the Langmuir isotherm model, as further confirmed by nonlinear fitting with low RMSE and χ 2 values. Thermodynamic analysis revealed negative Δ G values, positive Δ H and Δ S values, indicating a spontaneous, endothermic, and entropy-driven process. Furthermore, PHPM demonstrated high adsorption efficiency toward La(III) and Ce(III), even in the presence of competing ions. A preliminary cost analysis indicated that the preparation of PHPM was economically feasible with low cost. The adsorbent maintained approximately 50% of its initial adsorption capacity after ten consecutive adsorption-desorption cycles. The findings demonstrate that PHPM was a promising adsorbent for the recovery of La(III) and Ce(III) from aqueous environments.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Wenyi Li,Feng Li,Xiaoming Qiu,Chuangchuang Gong,Min Jiang,Zhenxin Zhao,Xiaomin Wang
Owing to the intrinsic dielectric-magnetic coupling loss mechanism, perovskite-type lanthanide-transition metal oxide (LaTMO 3 ) is considered as a promising candidate for electromagnetic wave absorbing material, but unmodified LaTMO 3 suffers from limited polarization processes and weak super-exchange magnetic response. Herein, we manipulate the TM-O bond properties by regulating the configuration entropy of transition metal sites to address such issues within single-phase LaTMO 3 . Elaborate structural characterization and P-V-L bond theory demonstrate quantitatively the optimization of electromagnetic wave absorption performance mainly stems from the synergistic improvement in TM-O bond distortion degree and covalency, as well as the formation of diverse super-exchange pathways. Consequently, the high entropy La(Cr 0.2 Mn 0.2 Fe 0.2 Co 0.2 Ni 0.2 )O 3 exhibits a minimum reflection loss of −50.68 dB, an effective absorption bandwidth covering entire Ku band of 7.6 GHz. The radar cross section of the structure with La(Cr 0.2 Mn 0.2 Fa 0.2 Co 0.2 Ni 0.2 )O 3 coating are less than −10 dBm 2 within the incident angles -60-60°. This study contributes to a deeper understanding of design and preparation of efficient broadband electromagnetic wave absorbing materials.
研究领域:
材料科学
·
电磁学
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DOI
高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Chunying Chen,Jinjun Ren,Qing Jiao,Jingping Tang,Lili Hu
Joint doping with trivalent and monovalent ions is a widely adopted strategy to enhance the ionic conductivities of NASICON-type solid-state electrolytes (SSEs) with the general formula Na1+xZr2SixP3–xO12, but the underlying microscopic mechanism remains unclear. In this study, we synthesized a series of Na3+xLaxZr2–xSi2PO12 (NLZSPx, 0 ≤ x ≤ 0.4) ceramics and characterized their electrical properties and structures by using electrochemical impedance spectroscopy (EIS), X-ray diffraction (XRD), scanning electron microscopy (SEM), and advanced solid-state nuclear magnetic resonance (SSNMR). Among all of the samples, the composition with x = 0.2 exhibited the highest ionic conductivity, achieving 1.05 × 10–3 S/cm at 25 °C, which is 3.65 times higher than that of the undoped sample. XRD and SSNMR results prove that La3+ ions did not integrate into the main phase lattice to replace Zr4+ ions. Instead, they formed a heterogeneous phase predominantly composed of Na3La(PO4)2 at the grain boundaries. The content of Na3La(PO4)2 and the composition of the NASICON main phase were accurately determined by SSNMR. This impurity resulted in changes in the Si/P and Na/Zr ratios within the main phase. Some comparison experiments are carried out and prove that these changes were not the principal drivers of the increased conductivity. SEM results further indicated that doping with an appropriate amount of La3+ ions significantly increased the sample densification, thus promoting Na+ ions transport between grain boundaries─this being the key factor driving the observed improvement in ionic conductivity.
研究领域:
材料科学
·
固体物理
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产品关联
DOI
高影响因子
Catalysts
·
2025
·Vol. 15
·期 7
·623
·
IF 4
Caidong Du,Wenwei Wu,Jiangtao Shang,Keyi Xiang
Methane (CH4) has attracted much attention regarding its use in electrochemical carbon dioxide reduction reaction (CO2RR) due to its high mass-energy density; however, the uneven adsorption of intermediates on copper sites by conventional Cu-based catalysts limits the selective production of CH4. The introduction of a second metal can effectively regulate the adsorption energy of intermediates on the Cu site. In this paper, a method of alloying Cu with oxyphilic metals (M) using rapid electrodeposition is presented; the synergistic effect of the bimetal effectively directed the reaction pathway toward CH4. The best Faraday efficiency for methane occurred in the optimized Cu30La20electrode, reaching 66.9% at −1.7 V vs. RHE potential. In situ infrared testing revealed that the *CHO intermediate—a critical species for the electrocatalytic conversion of CO2to CH4—was detected on the Cu30La20catalytic electrode. However, no *CHO intermediate was observed on the Cu20La30electrode. Instead, the characteristic peak of the *OCCHO intermediate associated with C-C coupling emerged on the Cu20La30catalyst. This indicates that the adsorbed oxygen-containing groups on lanthanum sites reacted with carbon-containing groups on copper sites to form C2products, serving as the primary reason for the shift in reduction products from methane to ethylene.
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Jianping Huang,Xiukuang Zhang,Tiehui Fang,Binbin Liu,Tiezheng Lv,Zuli Mao
Lanthanum-cerium oxides have promising potential for high temperature thermal protection . In this paper, lanthanum-cerium oxides with different La contents were synthesized by hydrothermal method and subsequent thermal treatment. The effect of La content on the microstructure and infrared emissivity were thoroughly studied. The infrared emissivity in 2.5–10 μm wavelength band of the samples increases with the doping of La content. Compared with pure CeO 2 , the emissivity of La 2 Ce 2 O 7 increased 32.4% at 600 °C and 16.9% at 800 °C, respectively. The emissivity enhancement is attributed to the free carrier absorption and lattice absorption in wavelength band 2.5–10 μm. The enhanced emissivity is of great significance for the radiation thermal control in high temperature.
研究领域:
材料科学
·
陶瓷
·
热工工程
·
红外技术
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DOI
高影响因子
MATERIALS LETTERS
·
2018
·
IF 2.687
Keke Sun,Chen Xu,Tianke Hu,Caixue Lin,Yifeng Wang,Yulin Li,Ling Li,Yingxi Wang
In this work, novel core-shell γ-Fe 2 O 3 /La-MOFs@SiO 2 nanoparticles were fabricated and characterized. The feasibility for multifunctional drug carrier was investigated. The cytotoxicity proved the high biocompatibility and the drug release experiments showed the excellent pH-responsive release. The magnetic nature and strong blue fluorescence indicated the potential use for magnetic target and magnetic resonance/fluorescence dual mode imaging.
研究领域:
纳米医学
·
材料科学
·
药物递送
·
生物成像
·
分子成像
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Peng Zhao,Nengjie Feng,Bangjie Tan,Zhuobin Huo,Geng Liu,Hui Wan,Guofeng Guan
The exposed crystal facets are crucial to heterogeneous catalysis . Herein, the facet controlled Ce 1−x La x O δ (0 ≤ x ≤ 0.30) nanocomposites have been constructed elaborately via a hydrothermal route and used for soot abatement. The catalysts were characterized by XRD , TEM, Raman, FT-IR, XPS , H 2 -TPR, and so forth. With the increasing content of La 3+ , part of CeO 2 crystals transformed from nanocubes to nanorods , inducing distinct effects on the catalytic activity . When the concentration of La 3+ was lower than 10 %, the exposed facet in the catalyst was (200). After La 3+ were further introduced, the facet degraded to (111). La 3+ at low concentration would enhance activity by facilitating lattice oxygen delivery and inducing abundant surface oxygen species, especially O - , which were vital to surface sensitive soot oxidation . Nevertheless, excessive La 3+ ions would inhibit CO 2 desorption due to the generation of La 2 O 2 CO 3 , a strong alkali as a result of phase separation. Among all the catalysts, Ce 0.95 La 0.05 O δ showed the best catalytic performances for soot combustion, with T 50 of 375 °C.
研究领域:
材料化学
·
环境催化
·
纳米材料
·
能源化学
·
表面科学
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DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2017
·
IF 2.813
Honggen Peng,Jiawei Ying,Jingyan Zhang,Xianhua Zhang,Cheng Peng,Cheng Rao,Wenming Liu,Ning Zhang,Xiang Wang
Catalytic oxidation of formaldehyde (HCHO) is the most efficient way to purify indoor air of HCHO pollutant. This work investigated rare earth La-doped Pt/TiO 2 for low concentration HCHO oxidation at room temperature . La-doped Pt/TiO 2 had a dramatically promoted catalytic performance for HCHO oxidation. The reasons for the La promotion effect were investigated by N 2 adsorption, X-ray diffraction, CO chemisorption , X-ray photoelectron spectroscopy, transmission electron microscopy (TEM) and high-angle annular dark field scanning TEM . The Pt nanoparticle size was reduced to 1.7 nm from 2.2 nm after modification by La, which led to higher Pt dispersion, more exposed active sites and enhanced metal-support interaction. Thus a superior activity for indoor low concentration HCHO oxidation was obtained. Moreover, the La-doped TiO 2 can be wash-coated on a cordierite monolith so that very low amounts of Pt (0.01 wt%) can be used. The catalyst was evaluated in a simulated indoor HCHO elimination environment and displayed high purifying efficiency and stability. It can be potentially used as a commercial catalyst for indoor HCHO elimination.
研究领域:
环境催化
·
材料化学
·
纳米科学
·
大气污染控制
·
表面化学
·
多相催化
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DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2026
·
IF 8.1
Chaojun Yang,Zijian Feng,Zhe Dong,Yu Li
The development of polymer materials with flame-retardant and microwave-absorbing properties reduced fire risks and mitigated electromagnetic interference, representing an important direction in advanced materials research. In this work, La x Sm 1-x Mn 2 O 5 (xLSMO) mullite with varying La doping levels (molar ratio, x = 0.1, 0.3, 0.5) was synthesized via a co-precipitation method, and the effects of LSMO on the flame-retardant and microwave-absorbing properties of epoxy resin (EP) were investigated. The results demonstrated that LSMO exhibited excellent catalytic charring ability and a pronounced nucleating effect, effectively enhancing the compactness and strength of the char layer and thereby improving the fire safety of EP. When the La doping level was 0.3 and the LSMO loading in EP was 1wt%, the limiting oxygen index (LOI) increased from 24.1% to 32.3%, and a V-1 rating was achieved in the UL-94 test. The peak heat release rate (PHRR) and total heat release (THR) were reduced by 45.32% and 32.69%, respectively. In addition, the incorporation of LSMO endowed EP with favorable electromagnetic wave absorption capability, with a minimum reflection loss reaching −36.87 dB in the frequency range of 1–18 GHz. Therefore, the EP/LSMO composites exhibited considerable potential as multifunctional integrated materials in the fields of public safety and electromagnetic protection technology.
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DOI
高影响因子
RSC Advances
·
2026
·Vol. 16
·期 27
·24454-24464
·
IF 6.1
Xinyu Cheng,Zhihua Xu,Chenxi Guo,Ting Zhou,Alang Zhang,Feng Shi
In this work, a lanthanum-doped Fe3O4@polydopamine (PDA) core–shell composite was prepared via a hydrothermal method. XPS depth profiling revealed that La is uniformly distributed throughout the Fe3O4 particles, with a constant La/Fe ratio from the surface to 60 nm depth. The material exhibits superparamagnetic properties, enabling rapid magnetic separation within 30 s. Phosphate adsorption reaches equilibrium in 180 min, following pseudo-second-order kinetics (R2 > 0.999) and the Sips isotherm, with a maximum capacity of 123.44 mg P per g. XPS analysis revealed shifts in the La 3d spectra consistent with inner-sphere La–P complexation, providing supportive evidence for chemisorption. The adsorbent retained >85% of its capacity after five cycles using 1 M NaCl as the eluent. Negligible La leaching (<0.01 µg L−1) and low aquatic toxicity to Chlorella sp. further support its environmental safety. These results demonstrate that 2.5%La-Fe3O4@PDA provides a robust, magnetically separable, and reusable platform for phosphate removal, offering deeper mechanistic insights into La-doping and PDA synergy in established magnetic core–shell systems.
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DOI
PubMed
高影响因子
VACUUM
·
2023
·
IF 4
Haotian Cai,Kamale Tuokedaerhan,Zhenchuan Lu,Renjia Zhang,Hongguo Du
With the development of thin-film optoelectronic components and the increasing requirements for improved integration and performance of ultra-large-scale integrated circuits for devices, finding new high-k gate dielectrics to replace ZrO 2 has become a challenge. Elemental doping is an effective method to further improve the dielectric properties of ZrO 2 . In this work, a novel gate dielectric material was prepared by doping ZrO 2 with the rare-earth element La. The results show that the new gate media material has better performance; these include suppressing the crystallization of ZrO 2 as well as obtaining a large band gap (∼5.74 eV), a large conduction band shift ΔE C (∼2.96 eV), and a low leakage current (∼6.3 × 10 −6 A/cm 2 ). In addition, La doping can significantly suppress the generation of thin-film oxygen vacancies and low-k layers. Furthermore, the leakage current transfer mechanism of the device is systematically investigated. This study provides new insights for selecting a suitable La doping content for the modification of future gate dielectric materials.
研究领域:
材料科学
·
电子工程
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DOI
高影响因子
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