LUMINESCENCE
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2021
·Vol. 36
·期 4
·928-936
·
IF 2.464
Xiyue He,Wenxiang Li,Bijun Fang,Shuai Zhang,Xiaolong Lu,Jianning Ding
By designing an orthogonal experiment with four factors and three levels, (Na 0.5 Bi 0.495 Nd 0.005 )TiO 3 (NBT-Nd) nanopowders were prepared using a hydrothermal method under different conditions to determine the optimum hydrothermal synthesis conditions. The synthesized NBT-Nd nanopowders were characterized using X-ray diffraction measurement, ultraviolet–visible spectra, photoluminescence spectra, and transmission electron microscopy to evaluate the orthogonal experimental conditions. The results showed that NBT-Nd powders with excellent crystalline and luminescence properties could be obtained at 160°C, with a 16 h reaction time, 8 mol·L −1 NaOH, and with 0.4489 g C 19 H 42 BrN. The optimized hydrothermal method-prepared NBT-Nd powder has a rather pure rhombohedral perovskite structure at room temperature, and exhibits an aggregated polycrystalline structure containing nanotubes and nano-sized particles. Under excitation of 247 nm light, strong fluorescence emissions are excited at 423 nm and 441 nm in the NBT-Nd powder that were generated by transitions of Nd 3+ from 2 D 5/2 to 4 I 9/2 and from 4 G 11/2 to 4 I 9/2 , respectively. Through CIE1931 chromaticity calculation of the emission peaks, the NBT-Nd powder was shown to emit indigo blue fluorescent light.
研究领域:
材料科学
·
光学
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DOI
高影响因子
Materials Today Physics
·
2020
·
IF 10.443
Juan Li,Shuai Zhang,Fei Jia,Shuqi Zheng,Xiaolei Shi,Daqiang Jiang,Siyu Wang,Guiwu Lu,Liming Wu,Zhi-Gang Chen
Approaching practical thermoelectric devices require high-performance and machinable thermoelectric materials . However, the currently available materials are usually brittle. In this work, Nd-doped Mg 3 Sb 2 -based compounds exhibit not only excellent thermoelectric performance but also superior machinability . Mg 3.2 Nd 0.03 Sb 1.5 Bi 0.5 exhibits a high power factor of 20.6 μW cm −1 K −2 at 725 K and a peak zT of 1.8, which mainly originates from the increased n of ~8 × 10 19 cm −3 by Nd/Mg substitutional defects. Defect calculations predict that other rare earth elements (Sm, Gd, Tb, Dy and Ho) have the same effect as Nd on Mg 3 Sb 2 and the predicted highest achievable electron concentrations at 700 K are ~10 20 cm −3 . The measured hardness, Young's modulus and fracture toughness of Mg 3.2 Nd 0.03 Sb 1.5 Bi 0.5 are 1.1 GPa, 49.8 GPa and 1.4 MPa m 1/2 , respectively. In addition, the sample can be easily machined into the dog-bone shape with external thread at both ends, indicating the excellent machinability of Mg 3 Sb 2 -based materials. This work suggests a bright future of Mg 3 Sb 2 -based thermoelectric materials for practical applications and device fabrication .
研究领域:
材料科学
·
热电材料研究
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Shuyang Li,Jian Liu,Xiaoyong Yang,Yi Ding,Lin Zhu,Bo Liu,Ling Zhang,Shilin Luo,Jiehong Lei,Wenkun Zhu,Tao Duan
Zircon ceramics (ZrSiO 4 ) are promising candidates for actinide immobilization. Here, a series of Zr 1- x Nd x SiO 4- x /2 ( x = 0, 0.02, 0.20, and 1.0) ceramics are prepared to study the effects of phase evolution and acidity on the chemical durability of ZrSiO 4 -based nuclear waste forms. The results show that the chemical stability of the single-phase ZrSiO 4 sample is better than that of the biphasic Zr 0.8 Nd 0.2 SiO 3.9 sample due to the existence of a secondary highly soluble phase (Nd 2 Si 2 O 7 ), which increases the contact area with leachate. The normalized release rates of both zirconium (Zr) and neodymium (Nd) in the Zr 1- x Nd x SiO 4- x /2 ceramic waste forms increase with increasing Nd loading and acid concentration. LR Zr in ZrSiO 4 ceramics and LR Nd in Zr 0.98 Nd 0.02 SiO 3.99 ceramics are the lowest, while LR Zr and LR Nd reach the highest values in the Zr 0.8 Nd 0.2 SiO 3.9 and Nd 2 Si 2 O 7 ceramics, respectively. The normalized release rates of Zr are lower than those of Nd due to the difference in the energies of their bonds with oxygen atoms. Moreover, the changes in the surfaces of the leached ceramics are consistent with their leaching results.
研究领域:
材料科学
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核化学
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环境科学
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产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2023
·
IF 6.2
Ying Hu,Lu Shen,Yinan Zhang,Lingmin Lu,Haiyan Fu,Yuanbin She
Nitrite (NO 2 − ) is a widely used food additive and long-term aging of cooked leftovers may also contribute to the formation of NO 2 − , excessive consumption of NO 2 − is harmful to human health. Developing an effective sensing strategy for on-site monitoring of NO 2 − has attracted considerable attention. Herein, a novel colorimetric and fluorometric probe ND-1 based on photoinduced electron transfer effect (PET) was designed for highly selective and sensitive detection of nitrite (NO 2 − ) in foods. The probe ND-1 was strategically constructed by employing naphthalimide as the fluorophore and o -phenylendiamine as the specific recognition site for NO 2 − . The triazole derivative ND-1-NO 2 - could be produced exclusively by reacting with NO 2 − , leading to a visible colorimetric change from yellow to colorless accompanied by a significantly enhanced fluorescence intensity at 440 nm. The probe ND-1 exhibited promising sensing performances towards NO 2 − including high selectivity , rapid response time (within 7 min), low detection limit (47.15 nM) and wide quantitative detection range (0–35 μM). In addition, probe ND-1 was capable of quantitative detecting of NO 2 − in real food samples (including pickled vegetables and cured meat products) with satisfactory recovery rates (97.61%–103.08%). Moreover, the paper device loaded by probe ND-1 could be utilized for visual monitoring of NO 2 − levels variation of stir-fried greens. This study provided a feasible method for the accurate, traceable and rapid on-site monitoring NO 2 − in foods.
研究领域:
分析化学
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食品安全
·
生物传感
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DOI
PubMed
高影响因子
CHEMICAL PHYSICS
·
2022
·
IF 2.552
Xiyue He,Bijun Fang,Dun Wu,Xiaolong Lu,Shuai Zhang,Jianning Ding
Synthesis conditions for preparing [(Ba 0.85 Ca 0.15 ) 0.995 Nd 0.005 ](Ti 0.9 Hf 0.1 )O 3 (Nd-BCTH) nanopowders by hydrothermal method were tailored using orthogonal experiment method with three factors and three levels. X-ray diffraction measurement, field emission scanning electron microscopy, transmission electron microscopy, surface aperture adsorption analyzer, ultraviolet–visible spectra, and fluorescence spectrophotometer were used to characterized the synthesized nanopowders. Well dispersed Nd-BCTH nanopowders with excellent crystallization and luminescence properties are obtained at reaction temperature of 200 °C, 14 mol⋅L −1 alkali concentration, and 24 h reaction time without adding surfactant. The nanopowders present a pure pseudo-cubic perovskite structure with rhombohedral phase approaching the morphotropic phase boundary (MPB) at room temperature, which present nano-sized particles with slight conglomeration. Using 267 nm light exciting, strong photoluminescent emission peaks are excited at 364 nm, 422 nm and 440 nm in the Nd-BCTH nanopowders, which correlate with the transitions of Nd 3+ from 4 D 3/2 → 4 I 9/2 , 2 D 5/2 → 4 I 9/2 and 4 G 11/2 → 4 I 9/2 via two processes of non-radiative relaxation and fluorescent transition, respectively. The CIE1931 chromaticity calculation of the emission peaks and fluorescent photograph show that the Nd-BCTH nanopowders emit indigo blue fluorescent light.
研究领域:
材料科学
·
光学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Li Ding,Xuepeng Wang,Shanxin Yang,Wenda Xu,Yongde Yan,Yun Xue,Fuqiu Ma
In order to reveal the extraction mechanism of Nd on Ga-Al alloy electrode, the electrode reactions and alloy formation between Nd(III), Ga(III) and Al(III) ions in different molten salt systems were studied by multiple electrochemical methods. The cyclic voltammetry curves measured in melts with different concentrations confirmed that only three intermetallic compounds were formed in both Ga-Nd and Al-Nd systems. The preferential interaction of Nd with Ga in Ga-Al-Nd ternary system was further verified by cyclic voltammetry curves with varying potential window. In particular, the co-reduction process of three ions was gradually determined by the comparison of electrochemical behaviour in different melts. In addition, the interfacial reaction of Nd(III) ion on liquid Ga-Al alloy cathode was investigated, and the corresponding exchange current densities were measured through galvanostatic pulse (0.0049, 0.0047, 0.0056 and 0.0055 A cm −2 ) and Tafel method (0.0029 A cm −2 ).
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
·
2021
·Vol. 19
·期 1
·1-14
·
IF 10.435
Wei Zhuxin,Duan Guangxin,Huang Baoxing,Qiu Shanshan,Zhou Dandan,Zeng Jianfeng,Cui Jiabin,Hu Chunhong,Wang Ximing,Wen Ling,Gao Mingyuan
Background Fluorescence imaging as the beacon for optical navigation has wildly developed in preclinical studies due to its prominent advantages, including noninvasiveness and superior temporal resolution. However, the traditional optical methods based on ultraviolet (UV, 200–400 nm) and visible light (Vis, 400–650 nm) limited by their low penetration, signal-to-noise ratio, and high background auto-fluorescence interference. Therefore, the development of near-infrared-II (NIR-II 1000–1700 nm) nanoprobe attracted significant attentions toward in vivo imaging. Regrettably, most of the NIR-II fluorescence probes, especially for inorganic NPs, were hardly excreted from the reticuloendothelial system (RES), yielding the anonymous long-term circulatory safety issue.Results Here, we develop a facile strategy for the fabrication of Nd3+-doped rare-earth core–shell nanoparticles (Nd-RENPs), NaGdF4:5%Nd@NaLuF4, with strong emission in the NIR-II window. What’s more, the Nd-RENPs could be quickly eliminated from the hepatobiliary pathway, reducing the potential risk with the long-term retention in the RES. Further, the Nd-RENPs are successfully utilized for NIR-II in vivo imaging and magnetic resonance imaging (MRI) contrast agents, enabling the precise detection of breast cancer.Conclusion sThe rationally designed Nd-RENPs nanoprobes manifest rapid-clearance property revealing the potential application toward the noninvasive preoperative imaging of tumor lesions and real-time intra-operative supervision.Graphical abstract
研究领域:
生物医学工程
·
纳米医学
·
分子影像学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Baoguo Zhang,Li Wang,Yubao Liu,Yongjian Zhang,Lipeng Zhang,Zhongning Shi
Reliable access to Nd-containing mineral resources and their effective future use and recycling are crucial for the sustainable development of industries based on rare earth metals. As a precursor for room-temperature Nd electrodeposition, NdCl 3 is advantageous due to its abundance, low cost, and high availability; however, it is poorly soluble in most specialized ionic liquids and is therefore not widely used in solvometallurgical processes. Herein, we develop a practical means of Nd electrodeposition from a solution of NdCl 3 and AlCl 3 in 1,3-dimethyl-2-imidazolidinone, revealing that Al electrodeposition does not occur at the employed AlCl 3 concentration. Instrumental and electrochemical techniques are used to confirm the electrodeposition of Nd on high-purity Al substrates, and together with theoretical calculations, these techniques are employed to probe the mechanism of NdCl 3 dissolution, the electrolyte structure/composition, and the electrochemical behavior of the Nd-containing electroactive species. Our findings provide a strategy and theoretical basis for the cost-effective electrowinning of rare earth metals from their chlorides as upstream precursors.
研究领域:
冶金学
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材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 24
·1868
·
IF 3.2
Ngo Van Hoanh,Nguyen Thi Hoa,Pham Trung Kien,Le Huu Thanh,La Duc Duong
Doping rare-earth (RE) elements into ferrites is an effective strategy for modifying their physical structure, magnetic response, and electromagnetic-wave absorption behavior. In this study, nickel ferrite nanoparticles were modified with a small amount of neodymium (Nd) using a simple coprecipitation method. The influence of Nd content on morphology, crystal structure, elemental composition, magnetic properties, and X-band absorption performance was investigated using SEM–EDX, XRD, EDX mapping, VSM, and vector-network-analyzer measurements. The novelty of this work lies in systematically correlating low-level Nd incorporation with microstructural evolution, particle dispersion, magnetic parameter modulation, impedance matching, and X-band microwave absorption performance of NiFe 2 O 4 nanoparticles. The results confirmed the successful formation of Nd-modified nickel ferrite materials with different Nd contents. Nd incorporation reduced nanoparticle agglomeration and altered the magnetic parameters, particularly saturation magnetization and coercive field, thereby improving impedance matching and electromagnetic-wave attenuation in the 8–12 GHz range. The strongest reflection loss reached −25.47 dB at 11.56 GHz for the NiFe 1.97 Nd 0.03 O 4 sample at a matching thickness of 2.0 mm, corresponding to an electromagnetic-wave absorption efficiency of approximately 99.7%. These results indicate that Nd-modified NiFe 2 O 4 nanoparticles are promising candidates for X-band electromagnetic-wave absorption and shielding applications.
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高影响因子
Gels
·
2026
·Vol. 12
·期 7
·635
·
IF 6.4
Tongyu Qiu,Fengyuan Bian,Tong Meng,Wei Zhou,Weijie Zhang,Ming Ma,Yihu Wang,Bing Zhang
In this study, taking NdCl3and 2-amino-1,4-benzenedicarboxylic acid (H2ATA) as raw materials, a novel lanthanide metal–organic framework, Nd(ATA), was synthesized by the coprecipitation method. After loading antibiotic levofloxacin (LEV), Nd(ATA) was combined with GelMA hydrogel to prepare a drug-loaded composite hydrogel, LEV@Nd(ATA)-Gel, which can emit near-infrared fluorescence under excitation at 808 nm and possesses improved mechanical properties compared to pure GelMA hydrogel. LEV@Nd(ATA)-Gel exhibited high bactericidal activity and low cytotoxicity, with cell viability increased by 35% compared to the control group. The release rate of the loaded LEV was found increasing with the pH decreasing from 7 to 3, and demonstrated a potential responsiveness to wound microenvironment. Furthermore, drug delivery studies revealed a significant correlation with the fluorescence intensity of the composite hydrogel and the drug release behavior, and the extent of drug release was quantitatively captured by an in vitro imaging technology. This study successfully integrated the drug release with fluorescent signal of carrier, providing a highly sensitive and visualizable strategy for the development of internal wound adhesive.
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产品关联
DOI
PubMed
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2022
·Vol. 53
·期 1
·617-626
·
IF 2.872
Fu Yingzheng,Zhang Zhimin,Lu Xuchen,Pan Binfeng,Zhang Lipeng
A new approach that was designed to prepare Mg–Nd binary alloys via molten-salt-mediated magnesiothermic reduction by using Nd 2 O 3 and Mg metal as raw materials was presented. The overall approach was based on a chemical pathway that synergistically integrated a series of simple steps to produce Mg–Nd alloys that could meet the requirement of Nd content in commercial Nd-containing magnesium alloys. The key steps included preparation of NdCl 3 -containing molten salt, the reduction of NdCl 3 by Mg in molten salt, and the removal of MgCl 2 from molten salt. The results showed that this approach could indeed prepare Mg–(6 to 18) weight percent Nd binary alloys, and the remaining molten salt could be recycled after being treated with NdF 3 . When other parameters were fixed, the Nd content in alloy could be adjusted only by adjusting the concentration of NdCl 3 and MgCl 2 in molten salt. Besides, a decrease in temperature or an increase in the mass ratio of molten salt to Mg could further increase the Nd content in alloy when other conditions were fixed.
研究领域:
材料科学
·
冶金工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Zihao Chen,Xiaolu Liang,Zimeng Pan,Zhenyu Wang,Yao Wang,Haitao Wang,Jiachen Wang,Jiankun Sun,Jun Ma,Xuexing Jiang,Jubo Peng,Xin Gu,Jing Zhang,Xiang Liu
In this study, La 0.67− x Nd x Ca 0.25 Sr 0.08 MnO 3 (LNCSMO, x = 0.09, 0.10, 0.11, 0.12) films were prepared by sol-gel spin coating method. The results indicate that the LNCSMO film is oriented and grown on a La 0.3 Sr 0.7 Al 0.65 Ta 0.35 O 3 (LSATO) (00 l ) substrate. In addition, with the increase of Nd 3+ content, the Mn-O bond length ( d Mn-O ) and Mn-O-Mn bond angle ( θ Mn-O-Mn ) decreases. The concentration ratio of Mn 4+ increases firstly and then decreases, and resulting in an enhanced and then weakened double exchange (DE) effect. Measuring the variation of sample resistivity with temperature ( ρ -T) using the standard four-probe method. As the content of Nd 3+ increases, the metal-insulator transition temperature ( T p ) gradually decreases, and the resistivity ( ρ ) gradually increases. The replacement of Nd 3+ makes the peak temperature coefficient of resistivity value ( TCR max ) of the material firstly increase and then decrease. At x = 0.11, the TCR max reaches 34.28 % K −1 at 254.72 K. This provides new insights into the impact of Nd doping on electrical transport properties.
研究领域:
材料科学
·
凝聚态物理
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）