CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Wei Zhang,Xiaona Zhang,Yu Zhou,Ying Zhang
Mesoporous bioactive glasses have great potential for applications in the field of bone tissue repair due to their excellent biological properties, but effective information on the repair process is not available in a timely manner. Thus, real-time monitoring of mineralization and drug release processes will be beneficial to obtain the degree of healing and optimize the amount and distribution of drugs to improve targeted therapeutic effects. Here, erbium-doped mesoporous bioactive glass microspheres (Er/MBGs) were successfully synthesized by the sol-gel method, and the doping concentration of erbium was selected based on fluorescence, BET, and bioactivity tests. The results showed that 4Er/MBGs not only had the highest luminescence emission, higher specific surface area (418.8 m 2 /g) and mesopore volume (0.42 cm 3 /g) but also presented excellent bioactivity. Therefore, 4Er/MBGs were selected for in vitro real-time monitoring of mineralization and drug release. It has been shown that the luminescence intensity of 4Er/MBGs is linearly related to its mineralization degree; As the degree of mineralization increases in vitro , the intensity of the luminescence emission gradually decreases. The results of in vitro drug release monitoring experiments showed that 4Er/MBGs loaded with the anticancer drug doxorubicin (DOX) exhibited great pH responsiveness, and the loaded DOX selectively quenched the green emission of the microspheres. When the drug was released, the green emission recovered stably, and the signal value of the ratio R ( I 650 nm/ I 510 nm) of the emission intensity of the red to the green of the microspheres gradually decreased. Monitoring changes in the value of the R signal is instructive for tracking the drug release process. Meanwhile, in vitro antibacterial experiments indicated that 4Er/MBGs had a strong inhibitory effect on E. coli and S. aureus , with antibacterial rates of up to 92.5% and 90.7%, respectively. Collectively, Er/MBGs have potential applications as optically functional materials in bone tissue engineering.
研究领域:
生物材料学
·
骨组织工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2025
·Vol. 54
·期 6
·4882-4890
·
IF 2.5
Fu Yingtao,Chen Zhaoyang,Sun Yifan,Liu Yi,Fan Yanwei,Wang Junhua,Chen Huiming
In order to develop glass-ceramic materials capable of emitting neutral white light and to address the limitations of single rare earth element ion-doped luminescent materials, a glass-ceramic material containing Dy 3+ /Eu 3+ -co-doped NaCaPO 4 nanocrystals was successfully synthesized using the melt-quenching and two-step crystallization methods. The prepared glass-ceramic materials were characterized by X-ray diffraction, transmission electron microscopy, and photoluminescence spectroscopy. The energy transfer process between Dy 3+ and Eu 3+ ions was confirmed through excitation spectra, emission spectra, and luminescence decay curves. The emission coordinates and correlated color temperatures of samples with different doping concentrations were calculated using the standard CIE 1931 colorimetric system. The results showed that coordinated emission was achieved in the glass-ceramic containing NaCaPO 4 nanocrystals under excitation at 363 nm. Furthermore, by adjusting the concentration ratio of Dy 3+ and Eu 3+ ions, the color temperature of the white light emission could be tuned from 9910 K to 5349 K, enabling modification of the emission color from the cool-white region to the pure-white region, with chromaticity coordinates reaching (0.3350, 0.3040). Additionally, the material exhibited high thermal stability, with an activation energy of 0.18649 eV. It is expected that the Dy 3+ /Eu 3+ -co-doped NaCaPO 4 glass-ceramic studied here has broad prospects for applications in white light-emitting diodes.
研究领域:
材料科学
·
光子学
·
光学材料
·
稀土掺杂
·
固态照明
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Siping Wang,Zhaoyang Chen,Shala Bi,Zuyang Gao,Houjin Hu,Yi Liu,Bolong Zhang
Developing luminescent materials with lower cost and higher temperature sensitivity can provide more options for achieving precise optical thermometry. Therefore, the Tb 4 O 7 and Eu 2 O 3 co-doped BaO-ZnO-P 2 O 5 -B 2 O 3 glasses for optical thermometry were designed and synthesized using a high-temperature melting and quenching method. Due to the low optical basicity and the formation of defects of the glasses, the coexistence of Eu 2+ and Eu 3+ ions was achieved without the reducing agent. In Eu 2 O 3 doped glasses, the relative content variation of Eu 2+ and Eu 3+ ions was analyzed using high-resolution X-ray photoelectron spectroscopy. Emission spectra and fluorescence lifetimes confirmed the effective energy transfer processes between Eu 2+ and Tb 3+ or Tb 3+ and Eu 3+ , which play critical roles in the tunable white emission properties of the material. In the temperature-dependent fluorescence spectra, Eu 2+ ions exhibit significant thermal quenching behavior, which is key to achieving higher temperature sensitivity in optical thermometry. The Eu 2+ /Tb 3+ /Eu 3+ co-doped glasses were investigated for their optical temperature sensing behavior, utilizing the fluorescence intensity ratio techniques, within the temperature range of 273 K–498 K. The maximum absolute (at 498 K) and relative (at 273 K) sensitivity based on the fluorescence intensity ratio, were observed for Eu 2+ /Eu 3+ pairs were 0.145 K −1 and 1.46 % K −1 , respectively, outperforming the conventional Tb 3+ /Eu 3+ combination. Additionally, no significant fluctuation occurred during the repeated experiment. This work demonstrates that Eu 2+ /Tb 3+ /Eu 3+ co-doped BaO-ZnO-P 2 O 5 -B 2 O 3 glasses could be considered a promising candidate for optical thermometry.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE IONICS
·
2014
·
IF 2.112
Jing Yang,Zhen Huang,Bingxin Huang,Jing Zhou,Xiaoxiong Xu
NASICON-type structure lithium ion conductors have been considered as promising solid electrolytes due to its very high Li + -ion conductivity and chemical stability. In this paper, NASICON-type structured Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP) glass–ceramics are prepared from crystallization of glass powders, which are obtained by a simple melt-quench method. NH 4 H 2 PO 4 , H 3 PO 4 , P 2 O 5 and H 3 PO 4 &Al(PO 3 ) 3 are used as phosphorus sources, respectively. The obtained LAGP glass–ceramics are systematically characterized with X-ray diffraction, field emission scanning electron microscopy , differential scanning calorimetry and AC impedance spectroscopy . The different impurities are formed depending on the phosphorus sources, which further influence the microstructure. As a result, the lithium ion conductivity is significantly affected by the phosphorus sources. The highest conductivity of 5.21 × 10 − 4 S·cm − 1 is obtained when H 3 PO 4 is used as the phosphorus source under optimum conditions.
研究领域:
材料科学
·
固态离子学
·
无机非金属材料
·
能源材料
·
电化学
✓ 已验证
DOI
高影响因子
Functional Materials Letters
·
2019
·
IF 1.388
Jingwei Li,Shixi Zhao,Xia Wu,Lüqiang Yu,Enlai Zhao,Cewen Nan
A series of glass cathode materials x Li 2 O–50V 2 O 5 –(50− x )P 2 O 5 ( x = 2 0 , 25, 30, 35 and 40) have been synthesized by a simple melting–quenching method. 30Li 2 O–50V 2 O 5 –20P 2 O 5 glass (LVP30) shows the best cycling performance with a preferable capacity retention after 50 cycles. Then, we prepared a series of carbon-coated LVP30 glass-ceramic cathode materials by carbon coating and heat treatment. The carbon-coated LVP30 samples consist of the crystalline phase V 2 O 3 , VO 2 and Li 2 O–V 2 O 5 –P 2 O 5 glass. Among the carbon-coated LVP30 samples, LVP30-15C sample exhibits the best cycling and rate performance. It can retain a discharge capacity of 140 mAh ⋅ g − 1 after 100 cycles. This unique glass-ceramic structure can result in good conductivity and structural ductility.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2017
·
IF 2.354
Qiang Zhang,Xiayin Yao,Jean Pierre Mwizerwa,Ning Huang,Hongli Wan,Zhen Huang,Xiaoxiong Xu
Transition metal sulfides have attracted particular interests owing to their extremely higher specific capacity and more compatible with sulfide electrolyte than lithium transition-metal oxide for all-solid-state lithium batteries. FeS nanosheets with thickness of 10 nm are synthesized by a poly (vinyl alcohol)-assisted precipitation method and further successfully employed in Li/70%Li 2 S-29%P 2 S 5 –1%P 2 O 5 /Li 10 GeP 2 S 12 /FeS all-solid-state lithium batteries. The obtained all-solid-state lithium batteries show reversible discharge capacity of 550 mAh g − 1 after 50 cycles at current density of 0.1 A g − 1 and exhibit superior rate performances.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 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）