Materials Today Communications
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2024
·
IF 3.7
Teng Li,Ruizi Wang,Zikang Cai,Wenzhe Liu,Jiwei Song,Xixi Wu,Chunyan Cao,Liangjie Yuan
To date, LiCoO 2 has received extensive attention as a cathode material because of its unique characteristics. To satisfy the strong demand for high energy density , the cut-off voltage of LiCoO 2 is continuously increased. However, the structural instability of LiCoO 2 at a high cut-off voltage leads to capacity decay and many safety issues, which hinder further application of LiCoO 2 . Herein, YPO 4 is used to achieve a better electrochemical performance for LiCoO 2 at 4.55 V. In the synthesis process, YPO 4 is transformed into the Li 3 PO 4 and Y 2 O 3 phases, which are basically uniformly incorporated into the particle and form a composite with LiCoO 2 . Owing to the synergistic modification of Li 3 PO 4 and Y 2 O 3 phases, YPO 4 -modified LiCoO 2 materials show enhanced structural stability and excellent cycling performance. Particularly, 1.5% YPO 4 modified LiCoO 2 not only exhibits a reversible discharge capacity of 171.6 mAh g −1 over 500 cycles with 91.7% capacity retention, but also delivers a capacity of 144.5 mAh g −1 at 5 C (1 C = 274 mAh g −1 ). This work suggests that using rare-earth metal phosphates can be an effective strategy to improve the cycling performance of LiCoO 2 at 4.55 V.
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 9
·6576-6591
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IF 2.779
Wu Jinxiu,Wang Xin,Jia Huiling,Liu Zhaogang,Niu Xiaochao
Fluorescent nano-probes have great potential applications for diagnostics and therapy. In this work, the microwave-assisted Stöber method was used for the surface modification of the spherical nano-phosphor YPO 4 :2%Sm 3+ to solve the problems of hydrophilicity and biocompatibility of spherical fluorescent nano-material YPO 4 :Sm 3+ . Their structural, morphology and optical properties were determined using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectra, TG–DTA curve and fluorescence spectrophotometry. And the adsorption of YPO 4 :2%Sm 3+ @SiO 2 to bovine serum albumin was studied by the static isothermal adsorption method. Results indicated that YPO 4 :2%Sm 3+ @SiO 2 was uniformly monodisperse core–shell nano-sphere with an average diameter of 60–90 nm. The crystal structure and morphology of the phosphor YPO 4 :Sm 3+ was not changed after the surface modification, the thickness of the coating layer was approximately 10–20 nm and the fluorescence intensity and lifetime of the modified product were reduced. The adsorption of YPO 4 :2%Sm 3+ @SiO 2 to protein was the mono-molecular layer adsorption, the adsorption formula was Y = 0.0051 X −0.0000037 and the maximum adsorption amount q = 198.89 mg/g. This study successfully solved the problems of hydrophilicity and biocompatibility of spherical nano-phosphor YPO 4 :2%Sm 3+ .
研究领域:
材料科学
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生物医学工程
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DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
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2020
·Vol. 22
·期 11
·1-10
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IF 2.132
Yang Yunjiang,Zhu Xiaowei,Bao Jinrong,Bai He,Wu Anping,Qiao Yan,Bian Yulong,Zhao Xin,Li Wenxian,Liu Ying
In this study, the core/shell/shell-structured SiO 2 /YPO 4 :Nd/SiO 2 composite microspheres with near-infrared luminescence property were prepared by sol-gel method. The morphology and structure of the as-prepared microspheres were observed by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and infrared spectroscopy (IR). These tests show that the composite microspheres have a sandwich structure. The diameter of the core SiO 2 microspheres is ~ 220 nm, the intermediate layer thickness of rare-earth phosphate is ~ 5 nm, and the outer SiO 2 layer is ~ 20 nm thick. The core/shell/shell microspheres are emitted at 1063 nm in the near-infrared region, which attributes to optical transparent windows of biological tissues. Meanwhile, the interaction between the composite microspheres and bovine serum albumin (BSA) was investigated. The results showed that the composite microspheres could quench the emission intensity of BSA by binding the tryptophan residues in BSA. The synthesized core/shell/shell composite microspheres may be used as near-infrared luminescence probes in the field of biological tissue imaging.
研究领域:
材料科学
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生物医学工程
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Sayed Ali Khan,Abdul Jalil,Qudrat Ullah Khan,Rana Muhammad Irfan,Ikhtisham Mehmood,Karim Khan,Maryam Kiani,Binbin Dong,Noor Zamin Khan,Jun-Ling Yu,Ling Zhu,Simeon Agathopoulos
A novel single-phase white-light-emitting YPO 4 phosphor, single and co-doped with Dy 3+ /Eu 3+ , aiming at UV-pumping in white-light-emitting diodes (WLEDs) which exhibits an outstanding optical performance, was successfully produced. The crystal structure, the morphology, the electronic band structure , the electronic configuration, and the bond length of the prepared phosphors were thoroughly investigated, both experimentally and by computational methodology. The results showed that the host lattice provides various surrounding environments to the Eu 3+ activators is a results of Eu 3+ single and Dy 3+ /Eu 3+ co – doped YPO 4 phosphors. Under ultra-violet (UV) excitation (353 nm), the prepared tetragonal phase YPO 4 :Dy 3+ phosphors emitted a bluish-white-light because it has peaks of similar intensity in the blue and the yellow spectral region . The emission spectrum can be tuned from bluish white to green/yellow/red and warm white by adjusting the concentration of Tb 3+ /Eu 3+ dopants . A high photoluminescence quantum yield (PLQYs) 68.55% was achieved. It was observed that the tetragonal YPO 4 :Tb 3+ /Dy 3+ /Eu 3+ phosphors emit-white-light which covers the whole visible region, and have good thermal stability from 20 to 200 °C. Finally, a WLED was fabricated by using a UV LED (365 nm) chip coated with the optimized YPO 4 :Tb 3+ /Dy 3+ /Eu 3+ single-phase phosphor, demonstrating an excellent white-light emission with a high CRI value (R a = 92) and a low CCT value (T c = 2497 K). Hence, the produced material is a promising candidate for UV-pumped single-phase phosphor-converted WLEDs.
研究领域:
材料科学
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光学工程
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无机化学
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固体物理
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光电子学
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功能材料
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照明技术
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2016
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IF 3.014
Jinyu Yang,Lin Luo,Zhuo Chen,Xueyu Chen,Xiaoyu Tang
Single phase of Tb-doped YPO 4 phosphors with xenotime structure were successfully synthesized via a polyacrylamide gel at different annealing temperatures (650–1050 °C). The crystal structure, thermal behavior and optical properties of the as-synthesized samples were investigated by XRD , TG-DTA, FT-IR, PL, and XPS . The effects of heat treatment on the structure and luminescence properties of samples were discussed. The PL spectra results reveal that the annealing temperature plays a key role in the luminescence properties of products. The samples obtained under 650–850 °C exhibit a strong green emission at 546 nm, attributing to the 5 D 4 - 7 F 5 transition of Tb 3+ , while the samples produced above 850 °C emit dominating blue lines at 381 and 415 nm, corresponding to the 5 D 3 - 7 F 6 and 5 D 3 - 7 F 5 transitions, respectively. The XPS results imply that a part of doping Tb 3+ ions may be oxidized to Tb 4+ on the high-temperature thermal treatment process, which could be the reason for the bluish color of Tb-doped YPO 4 phosphors.
研究领域:
材料科学
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光学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·Vol. 13
·期 30
·15666-15673
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IF 5.1
Leipeng Li,Yifan Liu,Furong Yang,Wenting Zhao,Chongyang Cai,Yanmin Yang
Persistent luminescence (PersL) and mechanoluminescence (ML) are two interesting optical phenomena, which are initiated by trapped charge carriers in some materials upon applying heat or force stimulations. Therefore, it is meaningful to jointly investigate PersL and ML in a single material to better understand the correlation between them. Herein, we focused on Sm3+-doped YPO4 because it can emit both PersL and ML. On the one hand, we demonstrated that after being charged by X-ray, YPO4:Sm3+ emitted orange PersL for over one hundred minutes, which can be attributed to the 4G5/2 → 6H7/2 transition of Sm3+. During the PersL stage, Sm3+ ions consistently served as luminescent centers. Using thermoluminescence measurements, we confirmed a continuous distribution of traps in YPO4:Sm3+, with trap depths ranging from 0.59 to 0.81 eV. On the other hand, during the PersL process, we observed a significant enhancement in YPO4:Sm3+ upon receiving an external force stimulation. It suggested that in addition to heat, external force stimulation enabled the release of the same trapped charge carriers in YPO4:Sm3+, resulting in ML. Additionally, we confirmed that the ML of YPO4:Sm3+ belonged to the trap-controlled type, with both piezoelectric and triboelectric effects playing pivotal roles in the force-activated luminescence process. Our work offers insights into the coupling between PersL and ML, laying the foundation for the rational design of future multi-stimuli responsive luminescent materials.
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高影响因子
Journal of Materials Chemistry B
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2013
·Vol. 1
·期 30
·3661-3669
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IF 0
Gong Cheng,Yan-Lin Liu,Zhi-Gang Wang,Shui-Ming Li,Ji-Lin Zhang,Jia-Zuan Ni
Architectural design is important to achieve appropriate chemical and biological properties of nanostructures. Yolk–shell magnetic microspheres consisting of Fe3O4 cores and porous and hollow YPO4 affinity shells have been designed and constructed. The yolk–shell magnetic microspheres have a saturation magnetization (Ms) value of 48.3 emu g−1 with a negligible coercivity and remanence at 300 K and a BET specific surface area of 12.5 m2 g−1 with an average pore size of 10.1 nm for the mesoporous YPO4 shell. The novel multifunctional yolk–shell nanostructures can realize the selective capture, convenient magnetic separation and rapid identification of target phosphopeptides by taking advantage of the Fe3O4 magnetic cores and the selective YPO4 affinity shells. Sensitivity and selectivity of the affinity yolk–shell nanostructures were evaluated by digests of standard proteins and complex biosamples. 2678 unique phosphopeptides were captured and identified from the digest of mouse brain proteins. Therefore, this work will be highly beneficial for future applications in the isolation and purification of biomolecules, in particular, low-abundance phosphopeptide biomarkers.
研究领域:
生物化学
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纳米医学
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蛋白质组学
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产品关联
DOI
PubMed
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Meng-xing Xu,Yan Xu,Yu-zhen Liu,Dan Zhao,Shun-min Ding,Chao Chen
Acquiring practical catalysts was crucial for promoting the application of advanced chemical transformations. Here, a series of Co-Ni-P catalysts with addition of Y were designed for hydrogenation transformation of biomass-derived levulinic acid (LA) or furfural (FAL) in water. The molar-composition-manipulated catalysts were characterized in Co-Ni phosphide alloy nanostructure with YPO 4 enriched on surface and denoted as (YPO 4 ) x /Co y Ni 2-y P. By comprehensive catalytic measurements, both Co:Ni ratio in phosphide alloy and amount of YPO 4 were testified to be key factors to modulate intrinsic catalytic properties (hydrogen activation and acid catalysis) along Y-Co-Ni-P interface, the attractive and reproducible yield for desired product γ-valerolactone (up to 98 %) or cyclopentanone (up to 93%) could achieve under low H 2 pressure of 0.1–0.5 MPa over the well modulated catalyst (YPO 4 ) 0.2 /Co 1.0 Ni 1.0 P in comparison with high H 2 pressure (beyond 1.0 MPa) required in most of literature systems, indicating that the efficiency and feasibility of these important biomass transformations could be greatly enhanced on the low-cost and robust (YPO 4 ) x /Co y Ni 2-y P catalysts. These findings suggested that the phosphide-alloy engineering technique provided in this work could serve as a novel and practical method for innovating competitive catalysts to boost advanced heterogeneous catalysis applications as well as current aqueous hydrogenation transformations of biomass derivatives.
研究领域:
催化化学
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生物质能
·
绿色化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）