DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 18
·6074-6083
·
IF 4.174
Rongyun Jiang,Jian Yang,Yangqi Meng,Duanting Yan,Chunguang Liu,Changshan Xu,Yuxue Liu
Zn2Ga3−x−yCrxNdyGe0.75O8 (ZGGO:Crx,Ndy) persistent luminescent nanoparticles (PLNPs) (x = 0, 0.02; and y = 0, 0.01, 0.02, 0.03, 0.04) were synthesized via a hydrothermal method in combination with a following heat treatment under vacuum. The effects of Nd3+ concentration on chemical composition, size distribution, luminescence property, the persistent energy transfer from Cr3+ to Nd3+ and afterglow imaging were studied in detail. When the Nd3+ concentration was increased from 0 to 0.04, the particle size increased from 45.4 to 86.2 nm. The afterglow emissions in the NIR-I (696 nm) and NIR-II (1067 nm) regions, which are ascribed to the 2E, 4T2 → 4A2 transitions of Cr3+ and the 4F3/2 → 4I11/2 transition of Nd3+, respectively, were simultaneously acquired after stopping the 635 nm excitation. Among the nanoparticles with different concentrations, ZGGO:Cr0.02,Nd0.02 exhibits the strongest NIR-II afterglow intensity and the corresponding energy transfer efficiency from Cr3+ to Nd3+ is found to be 25.9%. In addition, enhanced X-ray excited afterglow imaging can be observed in Nd3+/Cr3+ codoped nanoparticles dispersed in water, human serum albumin solution and simulated lysosomal environment compared to the Cr3+ singly doped nanoparticles. Renewable NIR afterglow imaging was realized through an X-ray reexcitation strategy. In particular, both the X-ray excitation strategy accompanied by NIR-I afterglow emission and the red light (635 nm) excitation strategy accompanied by NIR-II afterglow emission exhibit high tissue penetration capability. This study provides a further understanding of how to develop a suitable strategy for realizing deep tissue autofluorescence-free bioimaging.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2023
·
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.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
·
2023
·
IF 9.4
Congcong Wang,Yu Meng,Zewen Su,Junqiang Dong,Yanbang Lian,Youqiang Huang,Yinyan Li,Shiqing Xu,Gongxun Bai
The acquisition of real-time temperature monitoring during photothermal therapy is significant to prevent unnecessary damage to healthy tissues. However, owing to complexity and diverse factors in microenvironment of cells, there still remain considerable challenges in achieving noninvasive temperature measurement and manipulation in therapeutic process. Herein, biocompatible Nd-doped MoSe 2 nanosheets have been developed on the premise of excellent photothermal effect, which manifest desirable photoluminescence and distinct temperature self-monitored capability in near-infrared I and II bio-windows. Based on thermally coupled energy levels of Nd ions, the real-time monitoring on temperature changes in intracellular environment can be realized which provide instant temperature feedbacks to avoid side effects from hyperthermia. Exclusive of detrimental elements such as F and Pb, the objective nanosheets manifest satisfactory biosafety and can induce effective tumor ablation under near-infrared irradiation with photothermal conversion efficiency up to 40.8%, providing an innovative vision for developing more precisely and safely photothermal approaches.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2023
·
IF 4.9
Jixiang Yue,Lichun Cheng,Jilei Xiong,Qingrong Yao,Man Wang,Yucheng Chen,Qianxin Long,Xiaojian Guo
A simple composite Sr 1– x Nd x MnO 3 ( x = 0, 0.05, 0.1, 0.15, 0.2) nano powders were successfully prepared by the sol–gel method as a light-weight broadband electromagnetic wave absorber. The effect of Nd 3+ doping on the structure, microstructure and properties of SrMnO 3 was investigated. It is found that with the doping of Nd 3+ , the space group of the SrMnO 3 changes from p 63/ mmc to pm 3 m , and the crystalline shape starts to change from hexagonal to cubic crystalline. Scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) tests confirm that the particle sizes of the sample decrease and the specific surface area increases, which are attributed to the inhibition of grain growth after Nd 3+ is doped. X-ray photoelectron spectroscopy (XPS) shows that after Nd 3+ doping, the content of oxygen vacancy increases, and Mn 4+ converts to Mn 3+ . Due to the defects of the materials, the polarization effect is enhanced, thus, the dielectric and magnetic properties of the doped samples are improved. The maximum reflection loss of the Sr 0.85 Nd 0.15 MnO 3 is −33.41 dB at 7.84 GHz for a thickness of 2.4 mm, while Sr 0.9 Nd 0.1 MnO 3 has the best bandwidth performance at 2.32 GHz with a reflection loss below −10 dB.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2024
·
IF 3.2
Xinyu Liu,Xin Wang,Yan Sun,Hanmeng Zhang,Yichong Chen,He Feng,Lili Hu,Shubin Chen
Effect of the substitution of Y 2 O 3 for Al 2 O 3 in the phosphate glass, Nd 3+ : P 2 O 5 -Al 2 O 3 -ZnO, on glass structure and properties are investigated. With Al 2 O 3 replaced by Y 2 O 3 , the decrease in coefficient of thermal expansion and Young's Modulus, as well as the increase in fracture toughness, lead to a significant improvement in thermal shock resistance. According to the NMR and Raman spectra, changes in the coordination of Al 3+ from P-O-Al (6) bonds to P-O-Al (4) bonds and glass structure occur, resulting in inflection points in properties. Moreover, the fluorescence properties are measured and analyzed. The relationship between glass structure and physical (ρ, T g , α ), mechanical ( E, H V , K IC ), and optical properties ( n, σ ems , Δλ eff , λ P ) are explained.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Hongyu Lu,Yang Lu,Difan Lin,Jiang Zhu,Yangyang Du,Hua Zou
Luminescent materials usually suffer from thermal quenching at high temperature due to the aggravation of nonradiation relaxations. Herein, a giant enhancement of up conversion (UC) luminescence is observed in negative thermal expansion (NTE) Y 2 W 3 O 12 :Nd phosphor upon increasing the temperature from 310 to 790 K. In addition, the temperature-dependent UC emission is reversible. To penetrate into the mechanisms, the temperature-dependent luminescence intensity and lifetime are investigated for Nd doped negative and positive thermal expansion (PTE) phosphors. Based these investigation, we infer that the underlying mechanism of the giant enhancement for Y 2 W 3 O 12 :Nd phosphor are due to combined effects of phonon assisted absorptions and contraction of NTE crystals. Moreover, the observation of temperature-dependent near-infrared spectra (NIR) can support the mechanism from the other side. The present findings pave the way to overcome thermal quenching of Nd 3+ ions and explore new thermal enhancement materials sensitized by Nd 3+ ions.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Yang Li,Hairun Ma,Wenyu Xie,Jiahao Liang,Min Li,Shaohui Guo,Guangxu Yan
The short service life and low catalytic activity of electrodes are the major bottlenecks limiting the practical applications of current electrocatalytic oxidation technology in wastewater treatment. In this study, a novel Ti/SnO 2 -Sb-Nd-Pt electrode loading TiO 2 nanotube (TiO 2 -NTs) array was proposed and prepared. The optimized TiO 2 nanotube (TiO 2 -NTs) arrays provided abundant anchoring sites for SnO 2 -Sb-Nd-Pt active coating and improved the bonding strength between the Ti matrix and the SnO 2 -Sb-Nd-Pt active coating as a mediator, as a result, higher electrocatalytic performance and stability. The nitrobenzene (NB) removal and service life were significantly higher in Ti/TiO 2 -NTs/SnO 2 -Sb-Nd-Pt (91.08 % and 4381.9 days) when compared to Ti/SnO 2 -Sb-Nd-Pt (80.61 % and 1151.2 days). In addition, the outstanding electrocatalytic performance of Ti/TiO 2 -NTs/SnO 2 -Sb-Nd-Pt with an oxygen evolution potential of 2.03 V and total voltametric charge of 5.88 mC cm −2 makes it a promising candidate for future industrial applications. These findings will lay a solid foundation for broadening the applications of well-defined TiO 2 -NTs arrays prepared via the two-step anodization.
✓ 已验证
产品关联
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.
✓ 已验证
产品关联
DOI
高影响因子
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.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Jin Liu,Yuyao Chen,Yue Shi,Bin Song,Jing Wang,Chong Zhang,Dan Zhang,Yuanyuan Feng
The development of hydrogen evolution reaction (HER) catalysts that combine high activity with high current density stability is an important step in promoting the scale-up preparation of green hydrogen in anion exchange membrane water electrolyzer (AEMWE). In this paper, we propose an asymmetrical “Nd−O–Ru” bridge active sites strategy in the rapid construction of rare earth metal oxides (M x O y , M = Nd, Ce) and ruthenium heterojunctions (M x O y @Ru/CNT, CNT stands for carbon nanotube) catalysts by a solvent-free microwave method. Experiments show that the catalyst exhibits excellent HER performance in alkaline media: driving 10 mA cm −2 and 1000 mA cm −2 only requires ultra-low overpotentials of 20 mV and 363 mV, and operates stably for 100 h at 1000 mA cm −2 . The combination of in situ Raman spectroscopy and theory calculations reveals that the p orbital of oxygen at the interface acts as an electronic bridge to mediate the coupling of the f orbital of Nd to the d orbital of Ru through “Nd−O–Ru” bridge enhancing the adsorption of water molecules while synergistically optimizing the free energy of hydrogen adsorption (ΔG H∗ ) and accelerating the kinetics of hydrolysis dissociation. Integrating this catalyst into the AEMWE yields current densities of 500 and 1000 mA cm −2 at voltages of 1.665 V and 1.806 V, respectively, thus offering a novel material design paradigm for industrial-scale water electrolysis. This study opens a new path for rational design of efficient energy conversion catalysts through orbital coupling engineering.
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2016
·
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.
✓ 已验证
DOI
高影响因子
Russian Journal of Physical Chemistry A
·
2022
·Vol. 96
·期 5
·1077-1084
·
IF 0.791
Huang Feng-Yu,Wang Zhe,Yi Fa-Cheng,Liu Yan,Wu Ya-Dong,Luo Ying,Jia Wen-Jing
Abstract A local bentonite from Gaomiaozi county (Inner Mongolia province, China) was purified, and the X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscope (SEM) were used for the characterization of the purified sample to determine its chemical constituents and microstructures. The sorption behavior of Nd(III) on bentonite was performed by batch technique, and the effects of contact time, clay dosage, pH, ionic strength and temperature were investigated. The results indicated that sorption of Nd(III) on bentonite was strongly dependent on pH values, suggesting that surface complexation was the main sorption mechanism in the sorption process. The sorption isotherm fitted well by Langmuir models. The thermodynamic parameters, such as, enthalpy (∆ H °), entropy (Δ S °), and Gibbs free energy (Δ G °) were calculated from the temperature dependent sorption data, and the results indicated that the sorption of Nd(III) on bentonite was a spontaneous process, and the sorption was endothermic.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）