JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 16
·13271-13289
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IF 2.779
Yu Xiaochen,Song Zeyu,Dong Xiaoqian,Li Huajian,Liu Haonan,Zhao Baoyan,Ye Ting,Jiang Yinlin,Li Xiaojie,Duan Li,Fan Jibin,Zhao Peng
g-C 3 N 4 and rare earth (RE)-doped (Yb, Nd and Ce) g-C 3 N 4 nanosheets were synthesized by a thermal method. The remarkable effects of RE doping on the structural, morphological, and optical properties of g-C 3 N 4 were investigated using XRD, FT-IR, SEM, BET, XPS, UV–Vis, PL, EIS and Mott–Schottky characterization techniques. The photocatalytic activities of RE doped g-C 3 N 4 nanosheets for different dyes were improved compared with g-C 3 N 4 under visible light irradiation, among which Ce/g-C 3 N 4 showed outstanding performance. Due to the doping of RE, it modulates the electronic structure of pristine g-C 3 N 4 and broadens its optical absorption range. In addition, a possible mechanism of photocatalytic degradation of dyes was propounded by free radical trapping experiments. This work may provide a reference for the rational design of photocatalysts and inspiration for the photocatalytic mechanism.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2019
·
IF 6.282
Zhong Yang,Jing Wang,Yiliang Hu,Chaoyong Deng,Kongjun Zhu,Jinhao Qiu
Flexible dielectric capacitors with large energy storage density play key role in modern electronic devices. Ceramic fibers with large dielectric constants are benign candidates to be introduced into the polymer matrix to enhance the energy storage density while guaranteeing the flexibility. In present work, Nd doped BaTiO 3 (NBT) fibers with and without dopamine (PDA) coating were successfully fabricated and introduced into the Poly(vinylidene fluoride) (PVDF) matrix. The dielectric constants and breakdown strength were simultaneously enhanced with a small loading of NBT filler. The subtle modulation was then performed around the filler loading at which the large energy density was obtained. With the NBT loading of 2.5 wt% and 4.2 wt%, the maximum energy density of 9.3 and 10.4 J/cm 3 were obtained in PVDF/NBT and PVDF/NBT@PDA composites, respectively. Both of experimental results and simulation indicate the effectiveness of dopamine coating on the uniform distribution of electric field and good comparability between the matrix and fillers.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Jing Liu,Bo Zheng,Pei Wang,Xingang Wang,Bin Zhang,Qiuping Shi,Tingfei Xi,Ming Chen,Shaokang Guan
Bioabsorbable magnesium alloys are becoming prominent as temporary functional implants, as they avoid the risks generated by permanent metallic implants such as persistent inflammation and late restenosis. Nevertheless, the overfast corrosion of Mg alloys under physiological conditions hinders their wider application as medical implant materials. Here we investigate a simple one-step process to introduce a cross-linked 3-amino-propyltrimethoxysilane (APTES) silane physical barrier layer on the surface of Mg–Zn–Y–Nd alloys prior to electrostatic spraying with rapamycin-eluting poly(lactic-co-glycolic acid) (PLGA) layer. Surface microstructure was characterized by scanning electron microscope and Fourier transform infrared spectroscopy. Nanoscratch test verified the superior adhesion strength of PLGA coating in the group pretreated with APTES. Electrochemical tests combined with long-term immersion results suggested that the preferable in vitro anticorrosion behavior could be achieved by dense APTES barrier. Cell morphology and proliferation data demonstrated that APTES pretreated group resulted in remarkably preferable compatibility for both human umbilical vein endothelial cells and vascular smooth muscle cells. On the basis of excellent in vitro mechenical property, the animal study on the APTES pretreated Mg–Zn–Y–Nd stent implanted into porcine coronary arteries confirmed benign tissue compatibility as well as re-endothelialization without thrombogenesis or in-stent restenosis at six-month followup.
研究领域:
生物材料学
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医学工程
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组织工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 37
·17563-17576
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IF 4.682
He Junjie,He Guo,Wang Panpan,Xu Lurun,Liu Jing,Tao Jingchao
In this work, new high-entropy RE 2 (Ce 0.2 Zr 0.2 Hf 0.2 Sn 0.2 Ti 0.2 ) 2 O 7 (RE 2 HE 2 O 7 , RE = La, Nd, Sm, Eu, Gd, Dy) ceramics were successfully prepared. RE 2 HE 2 O 7 ceramics exhibited a pyrochlore–fluorite dual-phase structure. For Sm 2 HE 2 O 7 ceramic, Ce 4+ with larger ionic radius was enriched in the fluorite phase, Sn 4+ and Ti 4+ with smaller ionic radii were enriched in the pyrochlore phase, while Zr 4+ and Hf 4+ with medium ionic radii existed in both phases. Compared with YSZ materials, RE 2 HE 2 O 7 ceramics exhibited a much lower glass-like thermal conductivity (1.19–1.68 W m −1 K −1 , 100–900 °C) and comparable thermal expansion coefficients (8.67–10.85 × 10 −6 K −1 , 1200 °C). Furthermore, due to grain refinement caused by the competition of two phases, the Vickers hardness (10.29–13.85 GPa) of RE 2 HE 2 O 7 ceramics is improved. The results indicate that dual-phase high-entropy RE 2 HE 2 O 7 ceramics are promising candidate materials for the next generation of thermal barrier coatings.
研究领域:
材料科学
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陶瓷工程
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
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2023
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IF 1.5
Huanghua Zhang,Yuming Zhao,Jinhui Liu,Jilei Xu,Dong Guo,Chenxu Li,Xianghong Zhou,Peixu Yang,Shaojun Zhang
The corrosion behavior of Mg-7Nd and Mg-10Y binary alloys were investigated through scanning electron microscope observation, hydrogen evolution, weight loss experiment and electrochemical test. It was found that the corrosion rates of two alloys are mainly influenced by the micro-galvanic corrosion between the second phase and α-Mg matrix, and the second phases (Mg 12 Nd and Mg 24 Y 5 ) have a higher activity than α-Mg matrix and act as an anode to corrode preferentially during the micro-galvanic corrosion process. Mg-7Nd alloy has a faster corrosion rate than Mg-10Y alloy due to the fact that it contains more second phase and the second phase containing Nd elements is more reactive. The different distribution of rare earth elements in the alloy can lead to different corrosion morphology.
研究领域:
材料科学
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腐蚀与防护
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产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
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2023
·
IF 3.5
Y. Ji,C.Y. Shao,D.D. Chen,W.C. Wang
Laser glass has been widely used in laser ignition devices, fundamental physical research, and material processing. In addition to the exploration of the glass composition, the optimization of preparation conditions is also of crucial importance to the performance of laser glass. Herein, the modification effect of additional fluorine and sulfur agents on Nd 3+ -doped fluoro-sulfo-phosphate glasses (FSP) has been investigated in detail. The contents of F and S were increased by up to 42% and 40% after agent addition. Fluorine and sulfur agents also decrease the non-linear effect and increase the chemical durability of FSP glasses, respectively. Moreover, the local environment around Nd 3+ ions is examined by electron paramagnetic resonance (EPR)., The direct connection between Nd-F and the possible connection between Nd 3+ and [SO 4 ] 2− have been detected with agent addition, which facilitate the promotion of radiation parameters. The emission cross-section and quantum efficiency of FSP glass increase by up to 56% and 54% after agent addition. This study aims to demonstrate the structure and property variations brought by additional agents, providing insight into the optimization of the melting procedure of high-performance FSP laser glasses.
研究领域:
材料科学
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光学
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激光物理
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玻璃科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
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IF 16.744
Yunning Chen,Renquan Guan,Xueying Cheng,Jie Zhao,Zhengkai Wu,Yan Wang,Qingkun Shang,Yingnan Sun
In this paper, two surface oxygen vacancy-rich TiO 2 composite photocatalysts were successfully constructed by solid thermal reduction ((R-Vo)TiO 2 ) and bimetallic doping (Nd-Fe-(D-Vo)TiO 2 ). The oxygen vacancies were characterized in detail using XPS, Raman, EPR and STEM. The results show that the excellent photocatalytic performance of Nd-Fe-(D-Vo)TiO 2 deriving from its doping energy and surface oxygen vacancies. Nd-Fe-(D-Vo)TiO 2 could degrade 58 % of phenol within 120 min, which was much greater than 15 % of TiO 2 and 27 % of (R-Vo)TiO 2 . Three composite photocatalysts, TiO 2 @EA, (R-Vo)TiO 2 @EA and Nd-Fe-(D-Vo) TiO 2 @EA, with better visible light absorption and photocatalytic performance were further obtained by bonding ellagic acid (EA) to the surface of TiO 2 . Nd-Fe-(D-Vo)TiO 2 @EA could almost completely degrade ethinyl estradiol within 20 min with a high minimization degree of 84 %. The possible sites of ethinyl estradiol attacked by free radicals were predicted by theoretical calculation combining with high-resolution mass spectrometry analysis, and the possible degradation mechanism was proposed.
研究领域:
环境科学
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材料科学
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化学工程
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光化学
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产品关联
DOI
高影响因子
Advanced Healthcare Materials
·
2022
·Vol. 12
·期 2
·2202117
·
IF 11.092
Shanshan Peng,Lizhen Wang,Lin Liu,Liang Song,Junpeng Shi,Hanrun Zheng,Jixuan Xu,Rui Rong,Yun Zhang
Manipulation of autophagic processes has emerged as a promising strategy for synergizing nanoagent-mediated photothermal therapy (PTT). Most of the current studies focus on improving PTT efficacy by inhibiting pro-survival autophagy induced by the heat generated from the photothermal process. However, autophagy induced by the nanoagents is usually ignored, which may weaken the effect of autophagy-mediated efficacy improvement in PTT if induced autophagy is pro-death. Therefore, this work aims at developing a nanoagent that is able to induce heat-synergetic pro-survival autophagy to optimize the efficacy of PTT. An approach is developed to coat carbon layer, polyethylenimine (PEI), and folic acid (FA) on NaYF 4 :Er,Yb,Nd@NaNdF 4 (DCNPs@C@PEI@FA, DCPF) nanoparticles successively, giving access to the nanoagent to induce pro-survival autophagy. The synthetic imaging-guided photothermal nanoagent displays outstanding targeting ability and biocompatibility based on the surface modification of PEI and FA. By using an autophagy inhibitor chloroquine, a conspicuously synergistic effect on DCPF-mediated PTT in vitro and in vivo tumor models (HeLa) is achieved. A promising strategy is presented here to enhance the efficacy of imaging-guided PTT by modulating the autophagy induced by the nanoagent.
研究领域:
纳米技术
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癌症治疗
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材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
SOLVENT EXTRACTION AND ION EXCHANGE
·
2021
·
IF 2.513
Yifu Hu,Chuan Lu,Qi Chen,Yaoyang Liu,Yu Zhou,Caishan Jiao,Meng Zhang,Hongguo Hou,Yang Gao,Guoxin Tian
In this paper, pertraction of Nd(III) and U(VI) from nitric acid media through a flat-sheet supported liquid membrane (FSSLM) was studied by using a self-made liquid membrane device, respectively, with N, N’-dimethyl-N, N’-dioctyl-3-oxadiglcolamide (DMDODGA) diluted in 40/60 (V/V)% n-octanol/kerosene as the carrier. The effects of various factors, such as the acidity of the feed and stripping phases, neodymium concentration, uranium concentration, DMDODGA concentration are discussed. The optimized conditions for Nd(III) transport were found to be 3 M HNO3 in the feed phase, 0.5 M HNO3 in the stripping phase, 0.48 M DMDODGA in n-octanol/kerosene as the carrier. When the initial concentration of Nd(III) was 1 × 10−4 mol/L, the transport rate of Nd(III) was 86.4(±2.2)%. Compared with Nd(III), the liquid membrane was less effective in the transport of U(VI), the highest transport rate of U(VI) was 57.2 (±2.6)%.
研究领域:
化学工程
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环境科学
✓ 已验证
DOI
高影响因子
Nuclear Engineering and Technology
·
2022
·
IF 2.817
Yan Wang,Jin Wang,Xue Zhang,Nan Li,Junxia Wang,Xiaofeng Liang
Series of unequal quantity Nd/Ce co-doped ceramic nuclear waste forms, (Gd, Nd) 2 (Zr, Ce) 2 O 7 , were prepared to tailor its ordered pyrochlore or disordered fluorite structure. The phase transition, microtopography, and elemental composition of the ceramic samples were systematically investigated, especially the effect of order-disorder structure on the chemical stability. It was confirmed that unequal quantity of Nd/Ce could synchronously replace the Gd/Zr-sites of Gd 2 Zr 2 O 7 . And the phase transition of order-disorder structure could be successfully tailored by regulating the average cationic radius ratio of (Gd, Nd) 2 (Zr, Ce) 2 O 7 series. The elements of Gd, Nd, Zr, and Ce are uniformly distributed in the ordered or disordered structures. The MCC-1 leaching results showed that (Gd, Nd) 2 (Zr, Ce) 2 O 7 pyrochlore ceramic nuclear waste forms had excellent chemical stability, whose elements' normalized leaching rates were as low as 10 −4 -10 −7 g‧m −2 ‧d −1 after 7 days. In particular, the chemical stability of disordered structure was superior to that of ordered structure. It was proposed that the force constant and the closest packing were changed with the structure transformation resulting the chemical stability difference.
研究领域:
材料科学
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核能工程
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无机化学
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产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 39
·395703
·
IF 3.874
Zhihua Li,Xin Ding,Bing Yu,Yu Min,Bin He,Youqing Shen,Hailin Cong
Near-infrared (NIR) emission materials can be widely applied in various fields, such as food detection, imaging, treatment, electronic products. With the trend of miniaturization of equipment, smaller materials are needed. In this work, we successfully synthesized a series of M2Ga2GeO7:N3+ (M = Ca, Ba, Sr; N = Cr, Nd, Er) samples and then focused on the study of Nd3+ doped Sr2Ga2GeO7 (SGGO). A series of SGGO:xNd3+ sub-micron phosphors were prepared via a microwave-assisted sol–gel process combined with subsequent calcination at 750 ℃, and the structural information and luminescent properties were systematically studied. SGGO is a representative tetragonal crystal and belonging to the space group of P4¯21m (113). The Nd3+ ions occupy eight-coordinated Sr2+ sites in the crystal lattice. From SEM analysis, the average particle size distribution is 219.7 ± 41.4 nm. The sub-micron phosphors have rich excitation spectra ranging from 350 nm to 850 nm and can produce multiband NIR emissions of 1331, 1056, and 905 nm when excited by ultraviolet and NIR light. The maximum emission intensity was obtained by optimizing the doping ratio of Nd3+ ions. A commercial chip was then utilized to fabricate light-emitting diodes (LEDs) to verify its application potential in NIR-II mini-LEDs. Compared with blue light LEDs, the as-prepared LEDs had good imaging penetration depth and could be clearly observed under 10 mm of chicken breast coverage. The maximum imaging penetration depth can be 33 mm.
研究领域:
材料科学
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光学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2025
·
IF 10
Tao Jiang,Ming Cheng,Yujiao Wang,Shaoqiang Guo,Wentao Zhou,Yafei Wang
The selective removal of neutron-absorbing fission products from spent nuclear fuel is critical for enhancing neutron economy and enabling efficient recycling. In this work, we present a novel two-step dry reprocessing strategy that integrates NH 3 /HCl gas mixture treatment with liquid Sn extraction to achieve phase-selective separation of Sm, Nd, Ru, Rh, and Pd from simulated U 3 O 8 -based spent fuel. Thermodynamic analysis and experimental validation reveal that decomposition of NH 4 Cl at elevated temperatures serves as the generator of NH 3 /HCl gas mixture capable of selectively chlorinating Sm 2 O 3 and Nd 2 O 3 into soluble chlorides while reducing U 3 O 8 to UO 2 and converting RuO 2 , Rh 2 O 3 , and PdO to their metallic states (Ru, Rh, Pd). Subsequent dissolution tests in LiCl-KCl confirm that Sm and Nd are almost completely removed, with chlorination efficiencies of nearly 100%, while uranium loss can be minimized by controlling direct NH 4 Cl contact. The coupled liquid Sn extraction at 1173 K enabled the recoveries of metallic Rh, Rh, and Pd with a promising extraction efficiency. This integrated approach significantly simplifies the partitioning of key neutron poisons (Sm, Nd, Ru, Rh, Pd) compared to conventional aqueous or pyrochemical routes, reduces secondary waste, and preserves uranium in its UO 2 form.
研究领域:
核化学
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放射化学
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核燃料循环
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材料化学
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湿法冶金
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热力学分析
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）