JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2022
·Vol. 332
·期 1
·105-117
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IF 1.754
Huang Xin,Shu Xiaoyan,Li Lingshuang,Chen Shuaipeng,Lu Xirui,Liao Bing,Xie Yi,Chen Shunzhang,Dong Faqin
Abstract Natural granite was considered for immobilizing nuclear waste Nd 2 O 3 (Nd 3+ simulated for An 3+ ). The structure and performance of pure granite were compared with Nd 2 O 3 doped granite sintered at 1500 °C. The introduced Nd 3+ distributed mainly in the glass network below the loading capacity (19 wt .%). Beyond that, tetrahedral SiO 4 units existed in a sheet form, while extra Nd 3+ precipitated as Nd 2 Si 2 O 7 . The doped Nd 2 O 3 improved the hardness (6.29–7.07 GPa) and density (2.19–2.71 g/cm 3 ) of matrix. Moreover, the solidified form presented NR Nd below 1.7 × 10 –6 g m −2 d −1 after 28 days. This work disclosed a potential host matrix for nuclear waste. Graphics abstract
研究领域:
材料科学
·
核废料管理
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2015
·
IF 2.605
Guanjun Wen,Kuibao Zhang,Haibin Zhang,Yuancheng Teng,Ye Zhou
Synroc is recognized as the second generation waste form for safety disposal of high-level radioactive waste (HLW). In this study, the Synroc mineral of rutile was employed as host phase for the immobilization of Nd 2 O 3 and CeO 2 , which were selected as surrogates of trivalent and tetravalent actinide nuclides. Rutile waste forms with different Nd 2 O 3 and CeO 2 incorporations were prepared under normal pressure sintering. Nd 2 Ti 2 O 7 pyrochlore was produced as the target phase in 1100 °C calcined Nd-bearing TiO 2 . Lattice stabilization of CeO 2 in rutile TiO 2 could not be accomplished even under 1500 °C sintering. The 28 day normalized leaching rates ( LR i ) of Ti and Nd in Nd-bearing rutile, which decline congruously as the Nd 2 O 3 content increases, are lower than 3×10 −5 g m −2 d −1 . The incorporation of CeO 2 significantly impairs the aqueous durability of rutile waste form.
研究领域:
核废料管理
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 5
·055321
·
IF 1.449
Ruo-Can Liu,Ke Liu,Yong Du,Xiao-Wei Xu,Run-Ping Jia
The thermoplastic polyurethane/Nd2O3 (TPU/Nd2O3) nanocomposites with different content of Nd2O3 nanoparticles are synthesized via an in situ bulk polymerization technique. The results of x-ray Diffraction and Scanning Electron Microscopy show that Nd2O3 nanoparticles with size of 40 nm are uniformly dispersed in TPU matrix. Furthermore, the degrees of microphase separation of the nanocomposites are evaluated by Fourier Transform Infrared Spectroscopy and Dynamic Mechanical Analysis, and the effect of different Nd2O3 nanoparticle contents on the properties of TPU/Nd2O3 nanocomposites is investigated. When the content of Nd2O3 nanoparticles is 0.5 wt%, the nanocomposites has the highest degree of microphase separation, and the corresponding melting temperature, decomposition temperature, tensile strength, and elongation at break of TPU/Nd2O3 nanocomposites reach their maximum values of 196.5 °C, 352.7 °C, 53.9 MPa, and 703%, which are higher by 17.9%, 13.5%, 89.1% and 32.4% than pure TPU, respectively. Meanwhile, the TPU/Nd2O3 nanocomposites also illustrate better chemical resistance characteristics compared with pure TPU. Finally, the interaction mechanism between Nd2O3 and TPU is investigated by x-ray Photoelectron Spectroscopy, which confirms that the coordination bonds between Nd2O3 and carbamate groups of TPU are existed in the nanocomposites.
研究领域:
材料科学
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高分子化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2015
·
IF 4.321
Yingchao Hu,Wenqiang Liu,Jian Sun,Mingkui Li,Xinwei Yang,Yang Zhang,Minghou Xu
A novel inert solid support of Nd 2 O 3 was introduced to enhance the cyclic carbonation/calcination performance of CaO-based sorbents. CaO particles were incorporated into Nd 2 O 3 by a wet-mixing method, using three organometallic precursors (OMPs) as calcium precursors and neodymium(III) acetate hydrate as inert support precursor. For comparison, CaO-based sorbents directly produced from precursors and the naturally occurring sorbent (limestone) were also investigated. FSEM and EDAX results revealed that the ultrafine active specie of CaO particles were homogeneously dispersed into Nd 2 O 3 inert support. As a result, an improved durability and higher carbonation conversion were observed owing to the retarded sintering and the delayed diffusion controlled stage respectively for the sorbents investigated. The performance of the synthetic sorbents also relies on the precursor. When calcium dl -lactate pentahydrate (CaL) was used to incorporate CaO into the inert support Nd 2 O 3 , the highest conversion and best durability were obtained. The effect of calcination temperatures on the sorbent durability was also investigated. Under a relatively severe calcination temperature of 900 °C, a high conversion of about 67% were obtained after 100 carbonation/calcination cycles for a sorbent synthesized from calcium dl -lactate pentahydrate (CaL) and neodymium(III) acetate hydrate. When the calcination temperature was changed to a mild one of 800 °C, a significantly high conversion (>92.5%) was maintained over 100 carbonation/calcination cycles. Besides, no apparent capacity decline was observed for the sorbents after granulation.
研究领域:
化学工程
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材料科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jiyuan Guo,Yihang Li,Bingbing Bao,Zishan Zhang,Rong Zhang,Hui Dan,Yi Ding
Developing new matrices capable of simultaneous immobilization of lanthanides and actinides are challenging. Herein, this paper reported the ZrSiO 4 -based borosilicate glass-ceramics with excellent immobilization capabilities of lanthanides and actinides. The phase evolution and microstructure transformation affected by the (Nd, Ce)-co-doping content were investigated systematically. The results indicated that the solubility limits of Nd and Ce in the obtained glass-ceramics decreased with increasing temperature, which were up to 18, 16 and 10 at% at 1400 °C, 1450 °C and 1500 °C, respectively. The formation rate of ZrSiO 4 increased with the increase of the (Nd, Ce)-co-doping content and temperature, which reached the highest value of 96.43 wt% with Nd and Ce content of 10 at% at 1500 °C. The densification of the obtained glass-ceramics also increased with the increase of the content of Nd and Ce. In addition, it was found that the immobilization mechanism of the resulting glass-ceramics was the synergistic immobilization effect of the ceramic crystal and glass network. This work indicated that the ZrSiO 4 -based borosilicate glass-ceramics might be promising matrices for immobilizing high-level radioactive wastes containing lanthanides and actinides.
研究领域:
材料科学
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核废料管理
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Jie Zhu,Guolin Cao,Yunjiao Li,Shilei Wang,Shiyi Deng,Jia Guo,Yongxiang Chen,Tongxing Lei,Jinping Zhang,Shenghong Chang
The transition metals in ternary oxide cathode materials for lithium-ion batteries inevitably exchange with protons in LiPF 6 -containing electrolytes to be dissolved, leading to loss of the active material and rapid capacity fading. Here, a chemically inert Nd 2 O 3 interlayer is employed to avoid the direct contact of the active material (LiNi 0.8 Co 0.1 Mn 0.1 O 2 ) and electrolyte. As a result, Nd 2 O 3 -coated LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) shows improved cycle performances with a capacity retention of 88.0% after 100 cycles over 3.0–4.4 V, 9.3% higher than the retention of the bare NCM811. Even at an elevated temperature, Nd 2 O 3 -coated NCM811 exhibits better cycle performance as well. The superior electrochemical performances for Nd 2 O 3 -coated NCM811 are ascribed to that Nd 2 O 3 encapsulation-assisted surface passivation alleviates the undesirable interface side reactions and transition metal dissolution (TMD). These features suggest the promising potential of chemically inert Nd 2 O 3 as a long-acting surface modifier in passivating electrolyte/electrode interface.
研究领域:
材料科学
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电化学
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电池技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yuhang Shan,Hang Yang,Libo Li,Yangmingyue Zhao,Shubo Fan,Suo Li
Lithium-sulfur batteries that utilize polymer electrolytes can significantly reduce polysulfide shuttling, offer high safety, and represent a promising energy storage solution. However, constructing efficient ion transport pathways at the electrode/electrolyte interface and within the cathode of solid-state lithium-sulfur batteries remains challenging. In this study, we proposed a polymer electrolyte made from a poly (vinylidene fluoride co-hexafluoropropylene) (PVDF-HFP) matrix with neodymium trioxide (Nd 2 O 3 ) nanorods as fillers. This polymer electrolyte slurry was incorporated into the cathode to establish a lithium-ion pathway between the electrode and the electrolyte. The potential difference between Nd 2 O 3 and the carbon layer generates an internal electric field, facilitating the formation of a smooth lithium-ion transport channel in a solid-state environment. We visualized these lithium-ion transport channels across the cathode interface using Molecular Dynamics (MD) simulations in an electric field. Simultaneously, the abundant oxygen vacancies in Nd 2 O 3 can interact with carbon groups in N,N-Dimethylformamide (DMF), promoting the formation of [Li(DMF) x ] + complexes. This interaction effectively reduces the radicalized DMF and enhances lithium-ion (Li + ) conduction. As a result, the solid-state lithium-sulfur battery demonstrated excellent cycling performance at room temperature, achieving a specific capacity of 940.8 mAh g −1 at a rate of 0.1C. This work contributes valuable insights for developing solid-state lithium-sulfur batteries with improved compatibility at electrode/electrolyte interfaces.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2022
·Vol. 24
·期 34
·5977-5986
·
IF 3.756
Peng Zhang,Wenxia Wu,Limin Wu,Yazhao Wang,Shengdi Ta,Zeyu Cheng,Shoulei Xu,Bernard Albert Goodman,Wen Deng
Transparent single crystals of (ZrO2)92(Y2O3)8−x(Nd2O3)x (x = 0.30, 0.50, 0.75, 1.00, 1.25, 1.50) were prepared by the optical floating zone method, and shown by XRD to have a cubic phase structure. Nd3+ entered into the crystal structure during crystal growth, and the lattice parameters and cell volume increased with increasing Nd2O3 concentration as Nd3+ replaced the smaller Y3+. A series of absorption peaks involving transitions from the Nd3+ ground state (4I9/2) were observed in the UV-vis-NIR absorption spectra. Under excitation with yellow light at 589 nm, up-conversion luminescence spectra showed three distinct emission peaks, corresponding to the 4D5/2 → 4I9/2 (334 nm), 4D3/2 → 4I9/2 (363 nm) and 2P1/2 → 4I9/2 (442 nm) transitions. The maximum intensity of the emission spectra was with 0.75 mol% Nd2O3, and higher concentrations resulted in quenching through electric dipole–quadrupole interactions. From analysis of the absorption and emission spectra using the Judd–Ofelt theory, values for the strength parameters Ωt (t = 2, 4, 6) and radiative transition properties were obtained for the (ZrO2)92(Y2O3)7.25(Nd2O3)0.75 single crystal. These showed Ω4> Ω2> Ω6, with the large Ω2 value indicating a highly covalent interaction and asymmetric local environment for Nd3+. The spectroscopic quality factor (χ) and radiative properties, such as the transition probability, radiation lifetime and branching ratio, indicate that this sample is a potential material for near-UV up-conversion luminescence and laser output.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
RADIOCHIMICA ACTA
·
2023
·Vol. 111
·期 6
·459-470
·
IF 1.8
Pan Tan,Xiaoyan Shu,Lingshuang Li,Yanrong Cheng,Du Liu,Xiaoan Li,Xirui Lu,Yi Xie,Shunzhang Chen,Bing Liao,Faqin Dong
The magmatic diagenetic environment was simulated by high-temperature melting and natural cooling. A series of glass-ceramics with different Nd 2 O 3 contents were prepared by using complex component granite (aluminosilicate material). The phase evolution of the matrix at different temperatures was studied by X-ray diffraction (XRD). The structure of glass-ceramics was analyzed by infrared spectroscopy (IR) and scanning electron microscopy (SEM). The mechanical properties of glass-ceramics were also evaluated. The results showed that the glass transition of pure matrix begins at 1200 °C, and the sample with the highest degree of vitrification is obtained at 1500 °C. The addition of Nd 2 O 3 promoted the melting of Fe 3 O 4 crystal, resulting in the complete amorphous matrix when the Nd 2 O 3 amount is in the range of 20–26 wt .%. With the further increase of Nd 2 O 3 content, Nd-bearing feldspar first appeared. No raw material Nd 2 O 3 was found, indicating that the formation of Nd-bearing feldspar may increase the carrying capacity of the material. The Gaussian fitting results showed that the glass-ceramic samples with Nd 2 O 3 content of 29 wt .% are mainly composed of Q 2 and Q 3 structural units. In the EDS result, part of neodymium was clustered with small bright spots, while the spots were uniformly distributed on the sample surface as a whole. Meanwhile, the addition of Nd 2 O 3 increased the mechanical properties of the samples (3.20 g/cm 3 , 8.33 GPa for the sample with 29 wt .% of Nd 2 O 3 ). The results provide a strategy for the treatment of solid waste with radioactive residual actinides.
研究领域:
材料科学
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核能工程
·
固体废弃物处理
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Sleshi Fentie Tadesse,Dong-Hau Kuo,Worku Lakew Kebede,Girma Sisay Wolde
Developing low-cost and visible-light-driven metal oxide and sulfide-based photocatalysts for the degradation of organic dyes has been a major area of research to mitigate environmental pollution. In this study, a low-cost and facile precipitation method at low temperature of 95 °C was used to synthesize visible-light-driven Nd 2 O 3 /Mo(S,O) 3-x ·0.34H 2 O heterojunctions (NdMoOS). The crystal structure, elemental composition, optical, and electrical properties of as-prepared materials were investigated using various analytical techniques. Organic dyes of methyl orange (MO), Rhodamine B (RhB), and Methylene blue (MB) were selected as model organic pollutants to evaluate the photocatalytic efficiency of as-synthesized materials under visible light irradiation. 20 mol% NdMoOS nanocomposite showed excellent degradation efficiency and it decomposed 98.8%, 99.9%, and 99.8% of MO, RhB, and MB after 120 min, 90 min, and 90 min visible light irradiation, respectively. HPLC-MS analysis further confirms the complete removal of dyes. The formation of heterojunction, high charge separation, and low recombination rate of photoinduced e - -h + pairs can contribute to the enhanced photocatalytic activity. Superoxide radicals (O 2–• ), hydroxyl radicals (HO • ), and holes (h + ) were identified as major oxidative species involved in the photocatalytic degradation mechanisms of MO, RhB, and MB dyes.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 22
·5426
·
IF 3.1
Zengqing Sun,Xiaoyu Li,Jinxin Xing,Min Gan,Zhiyun Ji,Yong Lyu
In this study, 12 mol% ceria-stabilized tetragonal zirconia polycrystal ceramics with xNd2O3(where x equals 0, 0.1, 0.2, 0.3, 0.4, 0.5, and 0.7) were synthesized via the solid-state method, and the effects of Nd2O3doping amounts on the mechanical properties and microstructure were studied. The results show that with an increase in the Nd2O3doping amount, the grain size of the ceramics was reduced from 2.93 μm to 0.69 μm. The hardness and strength of the ceramics increased significantly, while the fracture toughness decreased. The reduction in fracture toughness was attributed to the reduction in tetragonal grain size, which suppressed the tetragonal–monoclinic phase transformation caused by stress. Additionally, as the content of Nd2O3increased, the formation of cubic zirconia accelerated, but no second phase was observed. Most importantly, when the doping amount of Nd2O3reached 0.3 mol%, the comprehensive mechanical characteristics of the ceramics were optimal. This provides a research basis for the preparation of nanoscale 12 mol% ceria-stabilized tetragonal zirconia polycrystal ceramics.
研究领域:
材料科学
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陶瓷工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2023
·Vol. 57
·期 1
·015301
·
IF 3.4
Xiao Zhang,Zhe Xiong,Bin Tang,Chengtao Yang
The rapid advancement of mobile communications technology is imposing greater demands on electronic components. Microwave dielectric ceramics with a high dielectric constant (r) are crucial for the miniaturization and integration of microwave devices. Herein, The perovskite-structured (Ca0.61Nd0.26)1−x(Li0.5Nd0.5)xTiO3 (0 ⩽ x ⩽ 0.8) microwave dielectric ceramics with high r value were prepared by solid-state reaction method. The results demonstrated that the r value reached its peak at x = 0.6, which was influenced by the bond valence at B-sites. The τf and Q× f values decreased with increasing x value. Doping (Li0.5Nd0.5)2+ at A-sites led to an increase in the full width at half maximum of Raman peaks, indicating higher internal loss. A high dielectric constant and temperature-stable (Ca0.61Nd0.26)0.27(Li0.5Nd0.5)0.73TiO3 ceramic can be sintered with good microwave dielectric properties of r = 129.4, Q× f= 2,787 GHz, and τf = +1.9 ppm/°C.
研究领域:
材料科学
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电气工程
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微波技术
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陶瓷
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）