JOURNAL OF NUCLEAR MATERIALS
·
2017
·
IF 2.048
Yi Ding,Xinggui Long,Shuming Peng,Dong Zhang,Zhaoyi Tan,Xirui Lu
Zr 1− x − y Ce x Nd y O 2− y/ 2 ceramics, which were designed as waste form materials, were obtained by simultaneous substitution of Ce 4+ and Nd 3+ for Zr 4+ in ZrO 2 . The influences of the simultaneous substitution of Ce and Nd on phase transformation of ZrO 2 were investigated systematically. Also, the aqueous durability of the ceramics was evaluated. The results show that the phase transformation caused by the simultaneous substitution mainly relates to the total content of Ce and Nd. The ZrO 2 ceramics containing Ce + Nd < 30 mol% exhibit both monoclinic and cubic phases, while the ceramics containing Ce + Nd ≥ 30 mol% are cubic phase. And the cubic phase can be stabilized by incorporating 30 mol% Ce + Nd. Moreover, LR i are modified by the incorporation of Ce and Nd, because of the presence of oxygen vacancies . The Nd and Ce co-doped zirconia waste form exhibit excellent aqueous durability (∼10 −5 g m −2 d −1 ).
研究领域:
材料科学
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核废料管理
·
陶瓷工程
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产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Boyan Ai,Guoxiang Wang,Pengchao Liang,Jinxiu Bing,Majie Zhang,Qingwang Min,Xinxin Zhang
The development of highly active and acid-stable Ru-based electrocatalysts is of great significance for water electrolysis but remains a huge challenge due to serious Ru corrosion in an acid medium. Herein, we prepared oxygen vacancy (O V )-rich Nd-doped RuO 2 nanocrystals by facile synthesis via hydrothermal and subsequent annealing for efficient overall water splitting. The catalyst exhibits an overpotential of only 200 mV for OER and 44 mv for HER at the current density of 10 mA cm −2 in 0.5 M H 2 SO 4 electrolyte. Nd-doped RuO 2 only demands a cell voltage of 1.52 V to drive the overall water splitting reaction and displays excellent stability for 100 h. Density functional theory further revealed that the newly constructed Nd-doped RuO 2 sites activate the difficult to react *O intermediates, reducing the adsorption energy of the OER intermediates to effectively minimize the Gibbs free energy (*O to *OOH) of the reaction rate-determining step and regulate the center of the active site d-band. The synergistic effect of aliovalent doping and vacancy engineering contributes to the excellent electrocatalytic performance of Nd-doped RuO 2 . This performance control strategy can pave the way for the development of effective and economically viable catalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Jianru Li,Cunying Xu,Guilin Xiang,Wenkang Chen,Daiyun Gu,Qibo Zhang,Yixin Hua,Yan Li
The electrodeposition of neodymium (Nd) in a novel analogous ionic liquid (AIL), phenyltrimethylammonium chloride-ethylene glycol (TMPAC-EG), was investigated. The existence form and the electrochemical behavior of Nd(III) in TMPAC-EG were studied using spectroscopic, cyclic voltammetry and chronoamperometry analyses. The spectroscopic analyses indicates that Nd 3+ interact with Cl − and EG to form complexes [Nd(EG) 6-y Cl y ] 3-y as NdCl 3 dissolves in TMPAC-EG IL. Cyclic voltammograms reveals that the overpotential for Nd electrodeposition in TMPAC-EG IL decreases with the rise of the temperature. The diffusion coefficient of Nd(III) ions is calculated to about 10 −12 m 2 s −1 . The diffusion activation energy for Nd(III) ions is determined to be 22.8 kJ mol −1 from the temperature dependence of diffusion coefficient. The transient analysis indicates that initial nucleation behavior of Nd conforms to the three-dimensional instantaneous nucleation and growth model, which are largely independent of temperature. In addition, deposition temperature and deposition potential are found to have a great influence on the nucleation and growth kinetics of Nd electrodeposition. Depending on the temperature and potential of electrodeposition, metallic neodymium with caterpillar-shape, nodule, layered rock, or porous structures was obtained.
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
NATURE
·
2025
·
IF 48.5
Lin Yuexin,Lin Zhichao,Lv Shili,Shui Yuan,Zhu Wenjing,Zhang Zuhong,Yang Wenhan,Zhao Jinbo,Gu Hao,Xia Junmin,Wang Danning,Du Fenqi,Zhu Annan,Liu Jin,Cai Hairui,Wang Bin,Zhang Nan,Wang Haibin,Liu Xiaolong,Liu Tao,Kong Chuncai,Zhou Di,Chen Shi,Yang Zhimao,Li Tao,Ma Wei,Fang Guojia,Echegoyen Luis,Xing Guichuan,Yang Shengchun,Yang Tao,Cai Wenting,Li Meng,Huang Wei,Liang Chao
A critical challenge in the commercialization of perovskite solar cells (PSCs) is the simultaneous attainment of high power conversion efficiency (PCE) and high stability. Employing polymers interfaces in PSCs can enhance durability by blocking water and oxygen, and by suppressing ions interdiffusion, but their electronic shielding poses a challenge for efficient and stable PSCs 1–3 . In this study, we report a magnetic endohedral metallofullerene Nd@C 82 -polymer coupling layer, which features ultra-fast electron extraction and in-situ encapsulation, thereby promoting homogeneous electron extraction and suppressing ions interdiffusion. The Nd@C 82 -polymer coupling layer in PSCs exhibited PCE of 26.78% (certified 26.29%) and 23.08% with an aperture area of 0.08 square centimetres and 16 square centimetres (modules), respectively. The unencapsulated devices retained ~82% of the initial PCE after 2,500 hours of continuous 1-sun maximum power point operation at 65 °C.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2019
·
IF 2.683
Yanchun Hu,Xiangyu Zhao,Xianwei Wang,Shengjie Wang
In this study, double perovskite oxide Sr 2 FeMoO 6 doped with Nd was prepared through sol–gel method. SNFMO belongs to the I 4/ m space group. The Fe/Mo order of SNFMO obtained from Rietveld refinement are 89.3%, 88.6%, and 88.2% for x = 0.01, 0.03, and 0.05, respectively. For SNFMO ( x = 0.01, 0.03, 0.05) samples, the values of Fe 3+ /Fe 2+ ratio are 1.41, 1.51, and 1.53, and the values of Mo 5+ /Mo 6+ ratio are 0.37, 0.48, and 0.54. According to the minimum dM / dT of the FC curves, the Curie temperatures of SNFMO are 378, 367, and 380 K for x = 0.01, 0.03, and 0.05, respectively. H/M-M 2 curve analyses showed that all the samples have a second-order magnetic transition. In the magnetic field of 2.5 T, the maximum ΔS M of SNFMO ( x = 0.01, 0.03, 0.05) samples were 0.36, 0.63, and 1.23 J kg −1 K −1 , respectively.
研究领域:
材料科学
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凝聚态物理
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磁性材料
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DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2016
·Vol. 46
·期 1
·363-369
·
IF 1.491
Wang Xuesong,Li Haiying,Ni Mucui,Wang Lianyuan,Liu Li,Wang Han,Guo Xuexin
The ruptured Nd-doped In 2 O 3 porous nanotubes have been successfully synthesized by single-capillary electrospinning method. The morphologies of the as-prepared materials were characterized by scanning electron microscopy and transmission electron microscopy. It can be seen obviously that the surface of the nanotubes are distributed with cracks and pores, which formed such an open nanostructure. The crystal structures and components were determined by x-ray diffraction, energy-dispersive x-ray spectroscopy and x-ray photoelectron spectrometer. The gas-sensing properties of ruptured Nd-doped In 2 O 3 porous nanotubes were studied and the results show the excellent performances of the as-obtained materials. The response of ruptured Nd-doped In 2 O 3 porous nanotubes to 100 ppm of formaldehyde is 46.8 at the optimum temperature of 240°C. The response and recovery times are 8 s and 22 s, respectively. Furthermore, the lowest detection limit of formaldehyde is 100 ppb with the value of 2.4. In addition, the ruptured Nd-doped In 2 O 3 porous nanotubes exhibit good selectivity to formaldehyde and long-term stability.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 32
·15628-15634
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IF 3.925
Yuzhe Zhang,Jie Hua,Hao Wu,Yizi Shao,Peiyang Gu,Zhongyu Li
The separation and recovery of neodymium from industrial pollutants and environmental sewage has become a problem of concern. However, there are still several difficulties in the practical treatment process including low pH values, low concentrations of rare earth elements, and coexistence of multiple trivalent ions, which are long-term challenges for neodymium recovery. In this paper, the synthesis of a composite membrane prepared using chitosan as an efficient adsorbent for Nd3+ is reported. The introduction of polyethylenimine into the composite membrane provided abundant protonated amino nitrogen atoms and endowed the composite membrane with excellent buffering capacity under extremely acidic conditions. Carbon nanofiber aerogels in the composite membrane can effectively improve the specific surface area and mechanical properties. Moreover, the introduction of ion imprinting technology can effectively improve the specific adsorption of Nd3+ on the composite membrane, which makes the composite membrane able to easily separate Nd3+ from other coexisting ions. The adsorption capacity of single metal adsorption for Nd3+ is 43.63 mg g−1. The composite membrane also showed good reusability, and the regeneration efficiency reached 86% after 5 cycles. The results show that the composite membrane can be used for the separation and enrichment of Nd3+ in solution.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Analytical Methods
·
2025
·
IF 2.6
Manman Qin,Leting Wang,Kaixin Xu,Zhehao Liang,Chao Zhong,Yanfei Xie,Dan Shan,Jun Yu,Jiang Wang,Hao Fan
High-viscosity rice soup is not only a popular food item but also a traditional Chinese medicinal remedy. Herein, we developed a high-throughput characterization platform for high-viscosity rice soup analysis using Neutral Desorption Extractive Electrospray Ionization Mass Spectrometry (ND-EESI-MS) with untargeted metabolomics. The chemical fingerprint of high-viscosity rice soup was directly analyzed by ND-EESI-MS, with exogenous (e.g., heavy metals and pesticides) and endogenous pollutants detected via qualitative and quantitative tandem mass spectrometry. Multivariate statistical analysis was then applied to distinguish the quality of the high-viscosity rice soup effectively. The concentrations of heavy metals and pesticide residues in high-viscosity rice soup were quantified, demonstrating a strong linear relationship (R2 > 0.99) across the 0.05–2000.00 ng mL−1 concentration range. The limits of detection (LOD) ranged from 0.27 ng mL−1 to 2.18 ng mL−1, while the limits of quantification (LOQ) ranged from 0.82 ng mL−1 to 6.61 ng mL−1. Furthermore, three specific compounds—3-methyl-2-butenoic acid, salicylic acid, and rhamnose—were quantified. These compounds demonstrated excellent linearity (R2 > 0.99) within the linear range of 1.10–1500.00 ng mL−1. The LOD ranged from 0.56 to 1.30 ng mL−1, and the LOQ ranged from 1.71 to 3.95 ng mL−1. Owing to its capability for simultaneous detection of exogenous and endogenous contaminants in complex viscous matrices, this ND-EESI-MS platform demonstrated significant potential to enhance quality control in food safety surveillance and pharmaceutical manufacturing.
研究领域:
食品科学
·
分析化学
·
质谱学
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代谢组学
·
质量控制
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 8
·2063
·
IF 5.076
Zihao Zhao,Xiang Zhao,Mu Zhang,Xudong Sun
Surface-enhanced Raman scattering (SERS) for semiconductor nanomaterial systems is limited due to weak Raman signal intensity and unclear charge-transfer (CT) processes for chemical enhancement. Here, rare-earth element neodymium-doped titanium dioxide (Nd-TiO2) nanoparticles (NPs) were synthesized by the sol–gel method. The characterizations show that the doping of Nd ions causes TiO2NPs to show an increase in the concentration of defects and change in the energy level structure. The CT process between Nd-TiO2NPs substrate and probe molecule 4-Mercaptopyridine (4-Mpy) was innovatively analyzed using the relative energy level location relationship of the Dorenbos model. The SERS signal intensity exhibits an exponential enhancement with increasing Nd doping concentration and reaches its optimum at 2%, which is attributed to two factors: (1) The increase in the defect concentration is beneficial to the CT process between the TiO2and the probe molecule; (2) the introduction of 4felectron orbital energy levels of rare-earth ions created unique CT process between Nd3+and 4-Mpy. Moreover, the Nd-TiO2NPs substrate shows excellent SERS performance in Raman signal reproducibility (RSD = 5.31%), the limit of detection (LOD = 10−6M), and enhancement factor (EF = 3.79 × 104). Our work not only improves the SERS performance of semiconductor substrates but also provides a novel approach to the development of selective detection of probe molecules.
研究领域:
材料科学
·
光谱学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 4
·1486-1497
·
IF 3.5
Wang Chuilei,Huan Yu,Hou Limin,Liu Yilong,Wang Xinjian,Zhu Ruping,Wei Tao
The influence of Nd dopant on the photoelectric properties of 0.94Na 0.5 Bi 0.5 TiO 3 –0.06BaNi 0.5 Ti 0.5 O 3 – x Nd ceramics were systematically investigated in this work. As the Nd 3+ increases, the grain size gradually decreases and the crystal structure transforms from orthorhombic to tetragonal phase. Meanwhile, the dielectric constant and Curie temperature of ceramics gradually decrease, accompanied by the enhanced dielectric relaxation. The decreasing grain size and relatively strong ferroelectric properties facilitate the separation of photogenerated charge carriers. Optical absorption spectra indicate the enhanced absorption over a wider spectral range with a decrease optical band gap from 3.18 to 2.81 eV caused by Nd 3+ doping. The photocurrent density improves from 44 nA/cm 2 for the undoped sample to 105 nA/cm 2 for x = 0.05 sample under AM1.5 standard sunlight after 40 kV/cm high-electric-field polarizing. This result demonstrates that the Nd doped NBT–BNT ferroelectric ceramics have high potential for the application in next-generation solar cells. Graphical abstract
研究领域:
材料科学
·
固体物理
·
光电子学
·
陶瓷材料
·
光伏技术
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Hao Wu,Guoxiang Wang,Xinxin Zhang,Qingwang Min,Jiacheng Wang,Dazhi Wang,Longsheng Cao
Water electrolysis is one of the most promising green hydrogen production technologies. However, using precious metal materials as electrodes for these electrolyzers incurs high costs. To address these challenges and simultaneously retain the catalytic activity of precious metals, we synthesize a low-iridium catalyst, Nd–IrO 2 . At 10 and -10 mA/cm 2 , this catalyst exhibits 233 and 36 mV overpotentials. Nd – IrO 2 maintains stability over prolonged operation in acidic environments, as evidenced by its consistent overpotential. Advanced calculations using density functional theory (DFT) have demonstrated that incorporating Nd and an ample amount of oxygen vacancies can modulate the d-band center of Ir and reduce the adsorption energy of electrochemical reaction intermediates. In summary, we present the synthesis of a low-iridium catalyst, which provides valuable insights for the design and development of catalysts with improved electrocatalytic performance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Optical Materials
·
2026
·
IF 3.4
Dong Liu,Shuyi Zhang,Luzong Jing,Hao Wang,Guanwen Chen,Longfei Xu,Hongqiang Song,Xiangliang Kong,Zhongchen Wu,Yao Chen
The rapid expansion of commercial spaceflight is driving space X-ray detectors toward ultimate cost-effectiveness. Compared with conventional semiconductors, metal halide perovskites, with superior optoelectronic properties and low-cost solution processability, are promising candidates for space radiation detection. Herein, we first synthesized Nd-MAPbBr3 single crystals, with Nd3+ causing lattice contraction and thus improving the crystal tolerance factor. We uncover a correlation between color evolution and crystallization, with the precursor solution turning purple from colorless after adding NdBr3 and yellowing during crystallization due to methylamine oxidation. The fabricated planar Nd-MAPbBr3 X-ray detector exhibits a sensitivity of 162.64 μC Gy–1 cm–2 and a detection limit of 4 μGy s–1 under a low electric field of 20 V cm–1. Notably, after cumulative X-ray irradiation of 320 mGy, the sensitivity of the Nd-MAPbBr3 detector improves by 33.75%, demonstrating superior radiation tolerance. These results highlight Nd-MAPbBr3 single crystals as a promising material for space X-ray detection.
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DOI
高影响因子
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