CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yuan Liu,Junxia Wang,Jin Wang,Die Liu,Kunqi Liu,Long Kang,Tongmin Zhang
Composite ceramics, which integrate the advantages of multiple crystal structures, are considered promising candidates for nuclear waste forms capable of simultaneously immobilizing various radionuclides. In this study, a series of 0.4Sr 0.5 Zr 2 (PO 4 ) 3 –0.6Ce 1- x Nd x PO 4 composite ceramics were designed to co-immobilize the simulated fission product Sr and actinide surrogates Ce and Nd. These composite ceramics exhibited homogeneous phase distribution and high densification. Among them, the irradiation-induced damage in the representative sample, 0.4Sr 0.5 Zr 2 (PO 4 ) 3 –0.6Ce 0.6 Nd 0.4 PO 4 composite ceramic, was systematically evaluated under both He 2+ and Xe 20+ irradiation. After He 2+ irradiation, the crystallinity of the irradiated layer was retained despite the disruption of Raman-active bonding groups by point defects. Notably, the Ce 0.6 Nd 0.4 PO 4 phase exhibited significantly higher resistance to He 2+ irradiation than the Sr 0.5 Zr 2 (PO 4 ) 3 phase, as confirmed by GIXRD patterns and geometric phase analysis (GPA). Furthermore, fragmentation of Ce 0.6 Nd 0.4 PO 4 grains was observed, which was attributed to defect accumulation, the thermal spike effect, and the thermal expansion mismatch. Following Xe 20+ irradiation, the irradiated layer of the composite ceramic exhibited reduced crystallinity without complete amorphization, while the Raman-active bonding groups remained largely intact. Additionally, pore formation at grain boundaries was likely caused by the segregation and accumulation of irradiation-induced defects.
研究领域:
核材料
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陶瓷学
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辐射效应
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固态物理
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材料科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Yufei Hu,Jiashou Lv,Danqin Li,Meisi Yu,Wenjing Zhou,Furui Lin,Weiqiang Zhou,Jie Li,Caiqin Wang,Jingkun Xu
To facilitate the commercialization of methanol fuel cells, the development of catalysts that exhibit both high activity and durability is of paramount importance. Nevertheless, the widespread application of current Pt-based catalysts is limited by their high cost and susceptibility to CO poisoning, among other drawbacks. Research has shown that introducing suitable support materials can enhance their anti-poisoning, making support development a key focus. In this research, we suggest a new strategy based on the template method to successfully synthesize oxygen vacancies neodymium-doped TiO 2 hollow spheres (OV-Nd-THS). The platinum nanoparticles (Pt NPs) were successfully loaded onto the OV-Nd-THS support to form the OV-Nd-THS/Pt nanocomposite. This innovative nanocomposite serves as a highly efficient catalyst, converting solar energy and chemical energy into electrical energy. The results indicated that the catalyst exhibited an electrocatalytic performance of 2686 mA mg −1 under alkaline conditions, which significantly increased to 5252 mA mg −1 under illumination. After 400 cycle tests, the mass activity maintained approximately 62 % of its highest value, demonstrating excellent durability. This remarkable performance is attributed to Nd doping, which introduces abundant oxygen vacancies, facilitating oxygen adsorption and consequently generating more active sites. The separation efficacy of photogenerated carriers is improved by the presence of surface oxygen vacancies, which in turn improves photoelectrocatalytic performance. Moreover, the hollow structure of titanium dioxide enhances light-harvesting capabilities, thereby promoting charge separation efficiency and facilitating the kinetics of the methanol oxidation reaction. This study presents a novel approach and establishes a significant experimental foundation for the development of high-performance catalysts for direct methanol fuel cells.
研究领域:
材料科学
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能源化学
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电化学
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DOI
高影响因子
JOURNAL OF NUCLEAR MATERIALS
·
2024
·
IF 2.8
Yang Li,Fen Luo,Jiahong Wang,Yu Gao,Gangchuan Ji,Xirui Lu
This study used a ternary Na 2 O-B 2 O 3 -SiO 2 matrix to simulate the immobilization of complex TRPO waste. The study investigated the relationship between the solidified bodies with different TRPO waste contents and their solid solubility, FT-IR, Vickers hardness, and density. The study found that the maximum amount of TRPO waste that can be immobilized in the Na 2 O-B 2 O 3 -SiO 2 matrix was 20 wt .%. When the TRPO waste content ranged from 5-15 wt .%, it was primarily immobilized in the glassy phase. When the TRPO waste content exceeded 20 wt .%, the crystalline phases NdBO 3 and Na 3 Nd(BO 3 ) 2 , which contain the main waste element Nd appeared. Samples containing 20 wt .% TRPO waste resulted in leaching of 10 -6 g·m -2 ·d -1 . The presence of NdBO 3 and Na 3 Nd(BO 3 ) 2 crystals resulted in a decrease in the Vickers hardness and density of the samples. The highest values for Vickers hardness and density were 6.77 GPa and 2.7 g -1 cm -3 , respectively. The borosilicate matrix utilized in this study has proven to be an effective immobilization of complex TRPO wastes and holds promise as a treatment matrix for TRPO wastes.
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
OPTICAL MATERIALS
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2016
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IF 2.183
Pande Zhang,Benxue Jiang,Jintai Fan,Xiaojian Mao,Long Zhang
Cr and Nd co-doped laser ceramics, as the potential gain materials in inertial confinement fusion (ICF), have been widely investigated. And the study on valence states of chromium ions is important. The effects of sintering additives and annealing atmosphere on the valence state of chromium were studied in detail, and the results shown that the Cr valence states were demonstrated to be Cr 2+ and Cr 3+ ions in HIP-sintered Cr(0.2 at.%), Nd(0.8 at.%): LuAG laser ceramics. And the intensity of the near-infrared absorption band caused by Cr 2+ ions was attenuated with the decreasing SiO 2 concentration and increasing MgO amount. The near-infrared absorption could be eliminated by annealing in air. And the transformation of valence states of Cr ions in the Cr,Nd:LuAG ceramics were also confirmed by electron paramagnetic resonance and X-ray photoelectron spectroscopy.
研究领域:
材料科学
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光学工程
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物理学
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DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
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2023
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IF 6.4
Qi Zou,Qichi Le,Liang Ren,Chunyan Ban,Chenglu Hu,Yunchang Xin,Qing Liu,Wenyi Hu,Songhua Chen,Andrej Atrens
The corrosion behaviour of Nd alloyed magnesium alloy AZ80 in three simulated concrete pore solutions (SCPs) was studied using corrosion immersion tests and electrochemical tests. The study investigated the effects of the composition and pH of the SCPs on the corrosion properties of AZ80 and AZ80-1.0Nd using aluminum alloy AA6061 as a reference. The SCP1, SCP2, and SCP3 solutions were the simulated concrete pore solutions with different carbonation stages at pH 13.5, 12.5, and 9.7 respectively. The corrosion mainly in the form of localized corrosion, developed significantly along the transverse direction, and less in the vertical direction. AZ80 and AZ80-1.0Nd exhibited the best corrosion resistance in the SCP2 solution, which was attributed to the formation of a dense protective film on the surface. The corrosion in the high alkalinity SCP1 solution was first enhanced within 12 h and then somewhat decreased within 72 h attributed to the destruction and re-formation of the surface film. AA6061 corroded severely in the SCP1 solution and suffered significantly less corrosion in the SCP2 and SCP3 solutions. Nd alloying contributed to the reduced corrosion rates of AZ80 in the simulated concrete pore solutions, attributed to changes in the microstructure and electrochemical properties.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
BIOCONJUGATE CHEMISTRY
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2021
·
IF 4.774
Ruiyi Dai,Xiangrong Peng,Bi Lin,Danyang Xu,Ruichan Lv
In this research, a NIR II luminescence imaging and enhanced chemo-/photothermal therapy system of CuS–DOX–Nd/FA NPs for breast cancer and lymph node tracing under single 808 nm irradiation is proposed. Nd–DTPA molecular cluster with the NIR II imaging effect as the carrier was designed to load the ultrasmall CuS nanoparticles and chemotherapeutic drug doxorubicin hydrochloride (DOX). The composite probe is used for tumor lesion imaging and tracking the breast cancer sentinel lymph nodes with simultaneous chemo-/photothermal therapy (PTT) for breast cancer under the single 808 nm laser. This designed probe not only has high permeability and retention (EPR) targeting effect but also can respond to the tumor microenvironment (TME), realizing more precise and efficient release of DOX at the cancer focus. At the same time, CuS as a drug carrier has a good photothermal therapy effect (photothermal conversion efficiency: 27.9%). The serialized released chemotherapy DOX and synergistic PTT effect can be used to the treat the in situ breast cancer land and simultaneously kill the metastasis cancer. The system made the combined molecular clusters Nd–DTPA achieve NIR II imaging of tumor lesions of breast cancer and lymph node to obtain the integration of diagnosis of the transferred disease for better prognosis. The feasibility of the system had obvious tumor growth inhibition effect with NIR II imaging guided is verified by a series of in vitro and in vivo experiments.
研究领域:
肿瘤学
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生物医学工程
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纳米医学
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分子影像学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 106
·期 7
·4116-4127
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IF 3.9
Shuangli Dong,Yanqi Jia,Yongbao Xiao,Qinyuan Zhang
Despite the significant technological applications of laser glasses, the quantitative prediction and optimization of their properties, particularly the spectroscopic properties, remain challenging. Here we address this problem by regarding the nearest-neighboring congruently melting compounds as the “component and structural motifs” based on the phase diagram approach. The composition–structure–property (CSP) relationships of Nd 3+ -doped ternary phosphate glasses are investigated. Spectroscopic properties are quantitatively predicted with an error of less than 10% compared to the experimental results. In particular, the fluorescence lifetime ( τ m ) can be accurately calculated using the phase diagram approach, which is difficult to be predicted previously. Furthermore, the CSP databases with over 1000 compositions are established for the optimization of commercial laser glasses. This study enriches the CSP database of traditional laser glass and provides guiding significance for future research.
研究领域:
材料科学
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光学
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化学
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DOI
高影响因子
MATERIALS TRANSACTIONS
·
2017
·Vol. 58
·期 3
·395-399
·
IF 0.713
Xiaolong Liu,Chao Huang,Bing Li
In this paper, the cyclic voltammetry was applied to investigate the electrochemical reduction processes of Nd(III) ions in NdF3-LiF melts with or without excessive metal Nd. Equilibrium experiments were carried out in NdF3-LiF melts with excessive spheric metal Nd to investigate the relationship between the NdF3:LiF mass ratio and NdF2 concentration. Electrolysis experiments were performed in NdF3-LiF-Nd2O3 melts with different NdF3:LiF mass ratios to explore the relationship between the NdF2 concentration and the current efficiency.The results indicated that Nd(III) ions in the melts were reduced in two steps, i.e., Nd(III)→Nd(II) and Nd(II)→Nd(0). NdF2 could be formed by the comproportionation reaction between Nd(III) and Nd(0) and could stably exist in NdF3-LiF melts containing metal Nd(0). NdF2 mass concentration in the melts decreased from 45.5% to 36.4% with the increase of NdF3-LiF mass ratio from 7:3 to 9:1 in NdF3-LiF melts containing excessive spheric metal Nd, which resulted in a higher current efficiency during the electrolysis. And the highest current efficiency of about 50% for Nd extraction has been obtained by electrolysis in NdF3-LiF (9:1 mass ratio) melts with Nd2O3 (2%, mass concentration) at 1423 K.
研究领域:
冶金学
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电化学
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DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·Vol. 109
·期 1
·e70369
·
IF 3.8
Jiarun Wang,Yong Ge,Youkui Zhang,Baoliang Xu,Shuyang Li,Shiyin Ji,Shengtai Zhang,Tao Duan
The disposal of high-level waste, particularly the management of long-lived actinides after immobilization, requires a thorough assessment of the long-term stability of nuclear waste forms in underground repositories. In this work, the garnet Ca 1.5 Nd 1.5 Zr 1.5 Fe 3.5 O 12 was successfully synthesized via high-temperature solid-phase sintering at 1300°C, exhibiting excellent phase purity and microstructural integrity. The chemical stability of the garnet waste form was evaluated under various conditions, including acidic, alkaline, saline, oxidizing environments, and deionized water. Both static and semi-dynamic leaching methods were employed to investigate the leaching mechanisms in different solutions. In acidic leachate, the normalized leaching rate initially increased before decreasing, as the dominant leaching mechanism shifted from slow dissolution and surface reactions to long-term diffusion. In the other four conditions, surface dissolution and internal diffusion processes primarily controlled the leaching mechanism. Ca 1.5 Nd 1.5 Zr 1.5 Fe 3.5 O 12 demonstrated outstanding thermal stability and corrosion resistance, positioning it as a promising candidate for the immobilization of actinide nuclear waste.
研究领域:
核材料
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放射性废物管理
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材料科学
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环境化学
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陶瓷工程
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DOI
高影响因子
JOURNAL OF POWER SOURCES
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2026
·
IF 8.4
Ruoming Wang,Yanbei Liu,Yuzheng Lu,Sining Yun
Limited catalytic activity and inefficient ionic transport are major obstacles that compromise the overall performance of low-temperature fuel cells. To address this, we present a novel dual-regulation strategy that synergistically enhances electrolyte ion transport and electrode charge transfer. This approach achieves pre-reconstructed interfacial engineering through in situ phase reconstruction of the electrolyte during heat pretreatment, rather than through real-time interfacial evolution under operating conditions. By tuning the Ti:Ce ratio in the precursor composites, the Na 2 CO 3 -triggered reconstruction converted TiO 2 into oxygen vacancies Na 2 Ti 6 O 13 and formed Na 2 Ti 6 O 13 -CeO 2 (Nd) heterostructure electrolytes. Assembled with LiNi 0.8 Co 0.15 Al 0.05 O 2 electrodes, the optimized Ti:Ce-6%(PS) fuel cell achieves a superior power density of 1011 mW cm −2 at 550 °C. Its excellent structural stability enables stable cell operation for over 45 h at 100 mA cm −2 . This study provides a synergistic and scalable material design strategy for high-efficiency fuel cells.
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
·
IF 19.7
Yuran Li,Yu Zhang,Yuting Lin,Guangyan Xu,Ruixiang Xu,Wei Su,Tingyu Zhu
A K-Nd/Al 2 O 3 catalyst achieves a COS capacity of 1.46 g/g under H 2 S/O 2 co-feeding. • K modulates Nd Lewis acidity and facilitates the dissociative activation of H 2 O. • Synergistic K and Nd sites enable the formation of key *HOCOS and *HSCOO intermediates. • Adaptive Nd-O x sites, enhanced by K-induced effects, promote H 2 S desorption. The development of efficient alumina-based catalysts for carbonyl sulfide (COS) hydrolysis remains a significant challenge, as their application in real blast furnace gas is largely hindered by insufficient activity and poor long-term durability. Here, K-Nd/Al 2 O 3 maintains nearly complete COS conversion for 20 h at 120 °C and achieves a cumulative COS conversion capacity of 1.46 g/g under a simplified H 2 S/O 2 -containing atmosphere. Comprehensive characterization reveals that K-Nd co-modulation tailors acid-base site distribution, preserving active sites. Aberration-corrected HAADF-STEM and XAFS analyses confirm that Nd is predominantly atomically dispersed, existing as isolated, low-coordinated Nd-O x single-sites. During reaction, the Nd-O coordination number increases from 4.2 to 8.0 without aggregation, demonstrating reaction-induced reconstruction of the first coordination shell. Surface characterization, in-situ DRIFTS, and DFT calculations further show that K enhances surface electron density and fine-tunes Nd Lewis acidity, promoting H 2 O dissociation and nucleophilic *OH attack on COS, stabilizing *HOCOS and *HSCOO intermediates while facilitating H 2 S desorption. The synergy between Nd-O x centers and K-induced electronic regulation reconcile durable COS hydrolysis under harsh conditions. Download: Download high-res image (225KB) Download: Download full-size image
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高影响因子
MATERIALS & DESIGN
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2026
·
IF 8.2
Jiawei Li,Gaiyuan Chen,Min Chen,Zhengxin Wu,Yong Liu
Uranium tailings are directly upcycled into composite ceramics waste forms via microwave sintering. • A dual-phase SrZP/monazite structure enables simultaneous immobilization of Sr 2+ and Nd 3+ . • Rapid microwave sintering achieves high densification (4.24 g·cm −3 ) within 50 min at 1200 °C. • The composite ceramics exhibit enhanced mechanical strength up to 714.1 HV 1 . • Ultra-low leaching rates of Sr (10 –4 ) and Nd (10 –7 g·m −2 ·d –1 ) ensure long-term stability. As a primary byproduct of uranium mining and processing, Uranium tailings result in significant hazards for environment and human health owing to the presence of multivalent radioactive nuclides, especially for 226 Ra(II), 144 Nd(III), and 237 Np (III). Herein, we proposed a microwave one–step sintering of the uranium tailings to fabricate novel composite ceramics as (1– x )SrZP– x NdPO 4 ( x = 0, 0.2, 0.4, 0.6, 0.8, 1), suggesting the dual purposes of treating uranium tailings and immobilizing divalent fission products (FPs) and trivalent simulated nuclide. The phase evolution, microstructure, density, and chemical stability were systematically investigated for the sintered samples with different Sr/Nd ratios. As presented, the ceramics exhibit high densification without elemental enrichment via sintering at 1200 °C with a 50–min soak . As x increases in the crystalline phase, the content of monazite synchronously increases, leading to a maximum density of 4.24 g·cm −3 and a maximum Vickers hardness of 714.1 HV1 in final SrZP–NdPO 4 composite ceramics. More importantly, the SrZP–NdPO 4 composite ceramics demonstrate an excellent leaching resistance, correponding to the leaching rates of Sr and Nd as low as 10 –4 g·m −2 ·d –1 and 10 –7 g·m −2 ·d –1 over a 42–day period, respectively. This study offers a promising strategy for the long-term stabilization and safe disposal of the divalent FPs and trivalent radionuclides in uranium tailings via a ceramic solid-solution approach. A novel (1– x )SrZP– x NdPO 4 composite ceramic was designed to simultaneously enable uranium tailings utilization and the immobilization of divalent fission products (Sr) and trivalent surrogate nuclides (Nd). Download: Download high-res image (264KB) Download: Download full-size image
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高影响因子
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