BIOMATERIALS
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2012
·
IF 7.404
Zhen Liu,Zhenhua Li,Jianhua Liu,Song Gu,Qinghai Yuan,Jinsong Ren,Xiaogang Qu
Nanoparticulate imaging agents offer excellent diagnostic and therapeutic capabilities due to their intense and stable output, strong target binding via multiple ligands, as well as tunable biodistribution profiles. In the present work, we designed and synthesized PEGylated Yb 2 O 3 :Er nanoparticles with high Yb content in single particle (denoted as PEG-UCNPs) suitable for both X-ray CT imaging and up-conversion imaging. These PEG-UCNPs were facile to construct, possessed excellent stability against in vivo environment, and held long blood circulation time . Cell-cytotoxicity assay, hemolyticity, and post-injection histology analysis further demonstrated the excellent biocompatibility, indicating the feasibilities of PEG-UCNPs for in vivo applications. Compared with routinely used Iobitridol in clinic, well-prepared PEG-UCNPs provided much significantly enhanced contrast at a clinical 120 kVp voltage. By doping 5% Er 3+ into the nanoparticles, PEG-UCNPs presented a long-term stable and nearly single-band red up-conversion emission upon continuous irradiation with an assistant of a 980 laser . In addition, pharmacokinetics , biodistribution, as well as clearance of nanoparticles were studied after intravenous injection in a mouse model, reflecting their overall safety. PEG-UCNPs composed of intrinsic up-conversion luminescence property, higher X-ray absorption over Iobitridol, as well as excellent biocompatibility represented a nanoplatform for biomedicine applications.
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DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2026
·Vol. 109
·期 5
·e70838
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IF 4.2
Sheng Li,Rui Zhang,Min Chen,Junjie Shi,Jing Xu,Yueyao Liu,Xiao Zhang,Zhuoying Lian,Yuyan Wu,Yandong Li,Jianzhong Li
Understanding the phase equilibria of the Yb 2 O 3 -MgO-SiO 2 system is crucial to reveal the coating-medium interaction mechanism and guide composition design. In the present work, the isothermal section of the Yb 2 O 3 -MgO-SiO 2 system at 1600°C in air was systematically constructed using high-temperature equilibrium quenching experiment combined with XRD, SEM, and EPMA analyses. Ten phase regions were identified, including one liquid-phase region, four two-phase regions, and five three-phase regions. Comparative analysis with the binary subsystems highlights the restricted solubility of Yb 2 O 3 in MgO (1.61 wt%) and the associated asymmetry, which are rationalized by crystallographic constraints and defect energetics. This study fills a critical knowledge gap and provides essential phase equilibria data for designing advanced Yb-silicate coatings with enhanced CMAS and corrosion resistance, as well as for developing MgO-based refractory materials.
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DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2016
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IF 1.207
Liang Wang,Anqi Liu,Zhaohui Zhang,Bin Zhao,Yingming Xia,Yun Tan
In this work, a novel catalyst of Fe 3 O 4 @SiO 2 @Yb 2 O 3 was prepared and the degradation of thymol in reverse osmosis concentrate using ozonation was explored. The operational parameters, such as ozone dosage (8–48 mg·min − 1 ), initial thymol concentration (20–100 mg·L − 1 ), initial pH value (3–11), and catalyst Fe 3 O 4 @SiO 2 @Yb 2 O 3 dosage (0.2–1.0 g), were studied focusing on the thymol degradation and COD removal. The results indicated that the increase in ozone dosage, initial pH value, and Fe 3 O 4 @SiO 2 @Yb 2 O 3 dosage accelerated the thymol degradation and COD removal, while the increase in initial thymol concentration hampered the effect of ozonation. A pathway of thymol degradation by catalytic ozonation was proposed based on the intermediates detected by gas chromatography-mass spectrometer and ion chromatography . This paper can provide basic data and technical alternative for pollutant removal from reverse osmosis concentrate by ozonation.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
Analytical Methods
·
2019
·Vol. 11
·期 43
·5613-5622
·
IF 2.378
Xiaojiao Wang,Yang Li,Yuanzhen Zhou,Yijia He
Bisphenol A (BPA) is one of the most prevalent environmental endocrine disrupting chemicals. In this present paper, a facile BPA sensor was successfully fabricated based on a La-doped Yb2O3 nanorod modified carbon paste electrode (La–Yb2O3/CPE). La-doped Yb2O3 nanorods were synthesized using a one step hydrothermal synthesis method and further investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and amperometric response analysis were applied to characterize the electrochemical properties of the sensor. Under the optimal conditions, the oxidation current increased linearly with increasing the concentration of BPA in the range of 0.04 to 15 μM with a detection limit of 0.013 μM. The prepared La-doped Yb2O3 nanomaterial modified electrode showed good reproducibility, stability and anti-interference ability. Furthermore, this newly developed sensor was further adopted to measure BPA in tap water and milk samples. The possible electrocatalytic sensing mechanism is discussed.
研究领域:
环境科学
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分析化学
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纳米技术
·
电化学
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产品关联
DOI
高影响因子
CARBON
·
2023
·
IF 10.9
Shenquan Yang,Lu Tang,Hanjun Wei,Jimei Xue,Zhijun Wang,Qingyuan Wang,Feng Zhao
Creating porous structures is a practical method for enhancing the impedance matching and interfacial polarization of dielectric materials , which in turn leads to improved electromagnetic (EM) wave absorption performance . However, the use of nanoparticles , nanorods , and two-dimensional materials to construct a simple porous structure typically has a minor effect on the EM parameters and interface polarization. To improve impedance matching and reduce the reflection of EM waves while simultaneously enhancing interfacial polarization, a more rational structure for dielectric materials is desired. Herein, a ytterbium oxide/reduced graphene oxide (Yb 2 O 3 /rGO) composite with a volcanic rock-like structure is proposed to exhibit outstanding impedance matching and loss capacity and achieve high EM wave performance. The addition of Yb 2 O 3 is utilized to induce the formation of porous structures with varying morphologies. Yb 2 O 3 not only significantly improves the polarization loss but also facilitates volcanic rock-like structure construction, thus improving the EM wave performance. As a result, the Yb 2 O 3 /rGO composites with a volcanic rock-like structure exhibit outstanding EM absorption performance, including three-band absorption (C, X, and Ku bands), as evidenced by their minimum reflection loss (RL min ) of −57.2 dB (equivalent to 99.9999% effective absorption) at 11.6 GHz when the matched thickness is 2.1 mm and an effective absorption bandwidth (EAB) of 4.2 GHz. Simulations in the CST microwave studio further validate the benefits of the composite's unique structure, which shows a radar cross-section (RCS) reduction value of up to 38.1 dB m 2 . This work offers valuable insights for the development of next-generation EM wave absorption materials through the implementation of a well-designed and distinctive structure.
研究领域:
材料科学
·
电磁学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2012
·
IF 2.289
Fang Yuan,Jianxin Wang,He Miao,Cunxin Guo,Wei Guo Wang
The ternary system (Yb 2 O 3 ) x –(Sc 2 O 3 ) (0.11− x ) –(ZrO 2 ) 0.89 ( x = 0–0.11) specimens have been prepared using a co-precipitation method. The properties of this series of samples are affected by the ytterbium element. A stabilized cubic phase is obtained at room temperature by introducing ytterbium and the unit cell parameters show a linear increasing relationship with content of Yb 2 O 3 , which also contributes to abatement of the conductivity from 0.099 S/cm to 0.020 S/cm at 800 °C. However, the conductivity tends to remain a constant at lower temperatures ranging from 500 °C to 650 °C as the addition of Yb 2 O 3 is reduced to below 3 mol%, achieving high up to 0.015 S/cm at 650 °C for a 3Yb8ScSZ body, indicating a potential to be utilized as an electrolyte material for intermediate temperature solid oxide fuel cells.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Youzhou He,Mingzuo Chen,Yao Jiang,Lei Tang,Jianning Yu,Ya Chen,Min Fu,Xuemei Tan,Jiajia Jing,Guizhi Zhang,Xingyan Liu
The modification of graphite carbonitride (g-C 3 N 4 ) is beneficial to increase its specific surface area and high quantum efficiency, thus improving its activity. Herein, the Yb 2 O 3 /g-C 3 N 4 composites were adjusted through dual regulation synergistically (nanostructure design of g-C 3 N 4 and addition of lanthanide oxides Yb 2 O 3 ) to improve the photocatalytic performance of hydrogen production and NO removal simultaneously. The as-prepared 1% Yb 2 O 3 /tubular g-C 3 N 4 could efficiently promote the photocatalytic hydrogen evolution (4071.763 μmol·g −1 ·h −1 ) and NO removal performance (54.20%), which was approximately 8.85 times and 32.01% higher respectively than that of bulk g-C 3 N 4 prepared by melamine (g-C 3 N 4 -M). The formation process of·O 2 - and·OH radicals and the oxidation process of NO had been systematically studied through ESR and in-situ DRIFTS , which proved that the coupling of tubular g-C 3 N 4 with Yb 2 O 3 had a positive effect. This work provided a novel strategy for dual regulation (adjust morphology and metal oxide introduction) synergistically design of bifunctional photocatalysts to enhance H 2 production and NO removal simultaneously.
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
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