CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Yao Tong,Qin Wang,Xiaoting Liu,Enrou Mei,Xiaojuan Liang,Weidong Xiang
All-inorganic CsPbX 3 (X = Cl, Br, I) perovskite nanocrystals (PNCs) hold tremendous prospect in optoelectronics. Different from the previous method of preparing perovskite glass, the self-crystallization of CsPbX 3 (X = Cl, Br, I) PNCs glasses were successfully synthesized by introducing TiO 2 into the glass matrix without subsequent annealing and heat treatment engineering. The effective realization of self-crystallization was attributed to the nucleating agent changing the glass structure which has been confirmed by DSC, XPS, FTIR tests. As a nucleating agent, TiO 2 reduced the crystallization temperature of BSZ glasses and promoted controlled nucleation of PNCs. Surprisingly, the self-crystallized glass with high Photoluminescence quantum yield (PLQY) of 41.2% showed strong hydrothermal stability. After soaking in water for 30 days, the Pb 2+ escaped did not change significantly. The green-emitting LEDs made of BSZ-xTi achieved tunable colour coordinates of (0.1038–0.1177, 0.7376–0.7386). Furthermore, combining BSZ-2Ti with BrI 2 -2Ti on InGaN chip, the wide-color-gamut covering 93.15% of the Rec. 2020 standard was achieved. This study has an important role in guiding the synthesis of time-saving, environment-friendly and low-cost PNCs glasses, which made a contribution to deepening the understanding of the promoting effect of related nucleating agents on nucleation of PNCs.
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高影响因子
Optical Materials Express
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2018
·Vol. 8
·期 8
·2089-2102
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IF 2.566
Jian Cui,Xusheng Xiao,Yantao Xu,Xiaoxia Cui,Meiling Chen,Junjiang Guo,Min Lu,Bo Peng,Haitao Guo
For developing an ideal efficient and low-threshold medium for fiber lasers operated at 4 μm wavebands, 0.05 wt.% to 0.5 wt.% Dy3+ ions doped Ga0.8As39.2S60 chalcogenide glasses were investigated and a 4.2 μm fiber laser was theoretically studied based on the rate and propagation equations. It was shown that the Ga0.8As39.2S60 glass shows a desirable large Dy3+ ion solubility, which has been increased by an order of magnitude compared to As2S3 glass. Dy-rich nanocrystallines were found when the Dy3+ ions’ concentration is more than 0.3wt.% (i.e. 3000 ppmw), and the concentration quenching was found based on spectral analysis; however, no rapid decreases in lifetimes were observed. 0.3wt.% Dy3+ doped Ga0.8As39.2S60 glass possesses relatively large laser quality factor σemi × τmea = 1.70 × 10−23 cm2·s and excellent thermal stability (ΔT = 182°C), which can be successfully drawn into fibers indicating good potential for mid-infrared fiber laser.
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高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
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2017
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IF 2.124
Quan Guo,Yantao Xu,Haitao Guo,Xusheng Xiao,Changgui Lin,Xiaoxia Cui,Pengfei Wang,Fei Gao,Min Lu,Bo Peng
A serial (100 − x)Ge 25 Sb 10 S 65 -xI (x = 0, 5, 10, 15, 20, 25 and 30 wt%) chalcohalide glasses and ones doped with 0.1 wt% Dy 3 + rare-earth ions were synthesized and their structural, thermal and optical properties were systematically studied. It indicates that addition of I 2 into Ge 25 Sb 10 S 65 glass significantly decreases the connectivity of glass network and average bond energy, and modifies the associated properties. The glass transition temperature and refractive index decrease monotonically, and the density increases almost linearly with the increasing of iodine content in glass. The thermal stability is improved, which has a maximum of ΔT max = 174 °C. While the optical bandgap has a peak value at x = 10 wt%. The absorption spectra and mid-infrared fluorescence spectra of Dy 3 + rare-earth ions doped glasses were investigated together with the Judd-Ofelt analysis. GeS 2 nano-crystals were found in the sample with x ≥ 15 wt%, which is supposed to induce enhancements of mid-infrared fluorescence at 2.95 and 4.32 μm.
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高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
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2014
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IF 1.716
W.C. Wang,J. Yuan,X.Y. Liu,D.D. Chen,Q.Y. Zhang,Z.H. Jiang
The competition between infrared down-conversion (DC) and visible up-conversion (UC) is systemically studied in Tm 3 + and/or Yb 3 + /Tm 3 + co-doped fluoride modified germanate glasses. Based on the absorption spectra , the Judd–Ofelt intensity parameters, absorption and emission cross-sections, figure of merit (FOM), and saturated gain coefficient are calculated and analyzed. An intense 1.8 μm emission is obtained upon 808 nm laser diode (LD) excitation in Tm 3 + doped samples, while an efficient 1.8 μm emission is observed by 980 nm LD in Yb 3 + /Tm 3 + co-doped samples, along with visible UC emissions. It is found that 3 F 4 state of Tm 3 + can be easily populated and then further excited to higher excited states through Yb 3 + upon 980 nm LD. Our results suggest that these Tm 3 + doped fluoride modified germanate glasses are of great significance for searching efficient mid-infrared laser materials.
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高影响因子
JOURNAL OF POWER SOURCES
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2019
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IF 7.467
Zonghui Zhang,Lili Hu,Haizheng Tao,Jinjun Ren
Glassy precursors in the Li 1+ x Ga x Ge 2- x P 3 O 12 system are prepared by melting and casting. The glasses are annealed at the crystallization peak temperatures to obtain glass ceramics with Na-superionic conducting structure. The ionic conductivity can be significantly increased by substituting Ge with Ga and Li. The highest ionic conductivity of the glass ceramics is 9.74 × 10 −5 S cm −1 at 20 °C. Multiple magic angle spinning nuclear magnetic resonance (MAS NMR) techniques are used to characterize the structural transitions from glasses to their glass ceramic counterparts. 71 Ga and 31 P MAS NMR spectra have shown that the local structures of the glasses are distinctly modified after crystallization. The second coordinated shells of Ga 3+ ions are consisted of phosphorus in both glasses and glass ceramics although their coordination numbers change. The glassy precursors show homonuclear segregations such as P-O-P and Ge-O-Ge linkages. However, the glass ceramics are homogeneous, in which per phosphorus tetrahedron connects with total four Ga and Ge, forming four different phosphorus species (Q 0 (4-n)Ge, nGa (n = 0, 1, 2, and 3)). A random distribution model can be used to quantitatively predict the population of every Q 0 (4-n)Ge, nGa species, if the compositions are known. A correlation between local structure and ionic conductivity is proposed.
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高影响因子
International Journal of Nanomedicine
·
2024
·
IF 6.6
Wenpeng Yu,Jingli Ding,Jianfeng Chen,Ying Jiang,Jinping Zhao,Jichun Liu,Jianliang Zhou,Jinping Liu
Introduction Excessive generation of reactive oxygen species (ROS) following myocardial ischemia-reperfusion (I/R) can result in additional death of myocardial cells. The rapid clearance of ROS after reperfusion injury and intervention during subsequent cardiac repair stages are crucial for the ultimate recovery of cardiac function.Methods Magnesium-doped mesoporous bioactive glasses were prepared and loaded with the antioxidant drug gallic acid into MgNPs by sol-gel method. The antioxidant effects of MgNPs/GA were tested for their pro-angiogenic and anti-inflammatory effects based on the release characteristics of GA and Mg2+ from MgNPs/GA. Later, we confirmed in our in vivo tests through immunofluorescence staining of tissue sections at various time points that MgNPs/GA exhibited initial antioxidant effects and had both pro-angiogenic and anti-inflammatory effects during the cardiac repair phase. Finally, we evaluated the cardiac function in mice treated with MgNPs/GA.Results We provide evidence that GA released by MgNPs/GA can effectively eliminate ROS in the early stage, decreasing myocardial cell apoptosis. During the subsequent cardiac repair phase, the gradual release of Mg2+ from MgNPs/GA stimulated angiogenesis and promoted M2 macrophage polarization, thereby reducing the release of inflammatory factors.Conclusion MgNPs/GA acting on multiple cell types is an integrated solution for comprehensive attenuation of myocardial ischaemia-reperfusion injury and cardiac function protection.
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PubMed
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
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2026
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IF 3.6
Haoyuan Yang,Xinyu Liu,Taiyu Duan,Weichao Wang,Qinyuan Zhang
Glass-forming region guided design gives a stable Zn(PO 3 ) 2 -AlF 3 -NaF fluorophosphate host (ΔT ≈ 166 °C) for fiber drawing. • Fluorine as a network modifier creates a low-phonon environment, boosting 1.5 μm emission. • Broadband 1.5 μm emission in bulk (47.2 nm) and fiber (ASE 1450–1650 nm, 0.187 dB/cm). Driven by the rapid growth of AI, 5G/6G, and chip-scale LiDAR, broadband 1.5 μm gain media with high efficiency and fiber compatibility are urgently needed. However, the structure-spectroscopy correlation governing the luminescence performance of Er 3+ /Yb 3+ co-doped glasses remains insufficiently understood. In this work, a Zn(PO 3 ) 2 -AlF 3 -NaF fluorophosphate glass composition (ZAFPN15) was selected based on a previously reported glass-forming region and characterized from atomic structure to fiber-level performance. Molecular dynamics simulations indicate that fluorine predominantly acts as a network modifier and that Er 3+ ions are predominantly coordinated by fluorine (Er–F coordination number ≈ 7.73). The local phonon energy around Er 3+ ions is estimated to be below 500 cm⁻ 1 , much lower than the nominal maximum phonon energy (∼1260 cm⁻ 1 ). The optimized glass exhibits a measured emission cross-section of 0.54 × 10⁻ 20 cm 2 at 1535 nm with an effective linewidth of 47.2 nm, together with a low inversion threshold (∼0.2). Fiber fabrication from this glass shows amplified spontaneous emission (ASE) spanning 1450–1650 nm with a propagation loss of 0.187 dB/cm at 1535 nm. These results demonstrate that this specific fluorophosphate glass composition can be processed into an active fiber with broadband near-infrared emission, and the structural data offer a possible explanation for the observed emission properties.
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高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Chao Li,Xiaosong Zhang,Lan Li,Lina Kong,Xiaokai Gong,Yueming Zhang,Shuwei Huang,Minxing Chen,Guanghui Liu,Xinru Wang
In recent years, the mid-infrared (MIR) source has become important for a wide range of applications in sensing, spectroscopy, imaging and communications. Due to the unique intra-4f shell transition, the infrared luminescence of rare earth ions has been widely used in infrared light-emitting devices. Despite recent advances with mid-infrared gain platforms, the lack of a tunable mid-infrared luminescence mechanism remains a significant technological challenge. Here, an efficient mechanism for tuning the local crystal field of rare earth ions by modifying the crystal structure of rare earth perovskites is revealed and tunable mid-infrared luminescence of rare earth ions is achieved. Significantly, the local crystal field of Er 3+ is tuned by changing the crystal structure of the CsPb 1-x Er x Br 3 rare earth perovskite. The energy level transition (1550 nm: 4 I 13/2 → 4 I 15/2 and 2.7 μm: 4 I 11/2 → 4 I 13/2 ) is changed by tuning the asymmetry of the crystal field and the FWHM of the mid-infrared emission is tunable from 80 nm to 130 nm. A convenient, highly accurate device has also been developed that can be used to measure the CO 2 concentration in hydrogen energy. The perovskite glass infrared light source has been well adapted to the characteristic infrared absorption peak of CO 2 . The instrument can monitor the CO 2 concentration in real time, avoiding the safety risks associated with the use of electronic instruments in hydrogen energy. These results are expected to open a wide avenue for a new type of tunable mid-infrared luminescence for a wide range of applications.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Shuailong Shen,Ziyi Guo,Wanmei Zhong,Jilin Zhang,Wenli Zhou,Liping Yu,Shixun Lian
All inorganic CsPbX 3 (X = Cl, Br, I) perovskite quantum dots (QDs) have excellent optical properties, and show great potential in optoelectronic devices, information storage, wide color gamut backlight display and other fields. In previous work, embedding CsPbBr 3 QDs into glass matrix through in-situ crystallization has become an important strategy to improve the stability of quantum dots. However, few reports have been made on the synthesis of high-quality whole family CsPbX 3 QDs glass by melt-quenching method. Herein, CsPbX 3 QDs glasses with full visible spectrum were synthesized by a closed melt-quenching technique. And the precise content of GeO 2 was used to regulate the size of glass network gaps to accommodate different sizes of CsPbX 3 QDs. The deconvoluted infrared spectra confirmed that the introduction of GeO 2 was beneficial to the increase of non-bridging oxygen in the rigid structure, the number and percentage of [BO 3 ] triangular units increased correspondingly, and the glass network changed in a three-dimensional and looser benign way, which was beneficial to the growth of large-size QDs. Finally, the luminescent properties of CsPbCl 2 Br, CsPbBr 3 and CsPbBrI 2 QDs glasses were improved respectively. The optimized CsPbX 3 QDs glasses have tunable luminescence in the full visible spectrum (414–692 nm), improved photoluminescence quantum yield (PLQY, ∼53.06 %) and longer decay lifetime, and excellent stability. Finally, the construction of a white light-emitting diode (WLED) device shows that CsPbX 3 QDs glass has potential applications in solid-state lighting.
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Bowen Zhao,Shuai Zeng,Xindong Qin,Zhengkun Li,Shiming Zhang,Haifeng Zhang,Zhengwang Zhu
Minor element addition will be considered to modulate the atomic structures of materials to achieve surface activation for enhancing catalytic capability. Herein, Ag minor alloying enhances the catalytic behaviors of Cu-Zr-Al MGs in degrading dye molecules due to in situ formed Cu-Ag nanocomposites as highly efficient and stable catalysts. The higher degradation efficiency and faster reaction rate for Cu 46 Zr 44.5 Al 7.5 Ag 2 ribbons than those of Cu 47.5 Zr 46 Al 6.5 ribbons are accurately achieved more than 99% efficiency and 0.32 min −1 reaction rate within 20 min after 30th run. The thermal activation energy barrier (ΔE) of 5.97 kJ mol −1 for Cu 46 Zr 44.5 Al 7.5 Ag 2 ribbons is lower than that of 8.47 kJ mol −1 for Cu 47.5 Zr 46 Al 6.5 ribbons. The enhanced capability can be attributed to the corrosion engineering and electrochemical principle, the inclusion of Ag as a cathode contributes to forming a micro-electric couple with Cu as an anode to generate a variety of active copper-based nanocomposites due to surface modification. More importantly, introducing Ag atom can promote the enrichment of Cu-Ag nanocomplexes on the surface of ribbons in order to provide stronger surface activity and faster electron transfer to further improve catalytic performance. These findings are expected to help open up new functional applications of CuZr-based MGs in environment field.
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高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Ce Li,Xu Zhang,V.C. Onah,Weiling Yang,Zhuang Leng,Xiliang Jiang,Fangming Zhang,Shasha Li,Yong Zhang,Yu Han,Huisheng Liu,Chun Li,Dingfu Zhou,Fanming Zeng
In analyzing the effect of alkali metal and alkaline earth metal oxide on the properties of tellurite glass , a series of tellurite glass samples doped with alkali metals and alkaline earth metals were prepared based on the TeO 2 -WO 3 -GdF 3 glass system by melt quenching method. Through tests and comprehensive analysis, the results show that after the F − ions successfully enter the glass network, the substitution of TeO 2 by alkali and alkaline earth metals could reduce the molar volume , which means the glass becomes more compacted. The influence on the glass network is mainly shown in [TeO 3 ] and [TeO 4 ] units. Alkali metals and alkaline earth metals could increase the asymmetry of the TWG: Eu 3+ glass network, shorten the critical distance, and increase luminescence intensity by 8.6 times and improve color purity to 94%. In addition, alkali metals could prolong the fluorescence lifetime , while alkaline earth metals could shorten it. Te 4+
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