CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xiaoman Li,Pengfei Zhai,Xinyu Liu,Guangqiang Liu,Rongfei Wei,Hai Guo
A series of novel Sn 2+ doped boroaluminate glasses were prepared by the traditional melt quenching method in this work. Their glass network structure, luminescent properties, and mechanisms were studied in detail. The main framework of the glass network was dependent on the glass network former (B 2 O 3 ) and intermediate (Al 2 O 3 ), and was characterized by the 11 B and 27 Al NMR spectra . Broadband tunable blue-violet emissions ranging from 320 to 550 nm were realized by regulating the glass network structure through optical basicity. The quantitative relationship between optical basicity and emission/excitation peak positions and intensities, FWHM, and Stokes-Shift of this Sn 2+ -doped glass were revealed, according to which the luminescent properties of Sn 2+ could be modulated and even predicted in the future. This work will enrich our understanding of the luminescent properties of Sn 2+ ions and the variations of glass network structure, guiding the design of efficient and tunable luminescent boroaluminate glass.
研究领域:
材料科学
·
光学
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DOI
高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Nian Shi,Lili Hu,Shubin Chen,Jinjun Ren
Molybdate crystals tend to precipitate in nuclear waste glasses, significantly compromising their chemical and thermal stability, thereby rendering them unsuitable for long-term storage. However, the mechanisms by which glass composition influences the precipitation of molybdate crystals remain poorly understood. This study investigated this influence by preparing three series of molybdenum-doped sodium–calcium mixed aluminum borosilicate glasses using the melt-quenching technique. Solid-state nuclear magnetic resonance (SSNMR) spectroscopy, supplemented by Raman spectroscopy, was utilized to examine the glass structure at the atomic scale to reveal composition-dependent structural impacts on crystallization, while transmission electron microscopy (TEM) and X-ray diffraction (XRD) were employed to identify the precipitated crystals. The results demonstrate that increasing the Al2O3 content effectively suppresses molybdate crystal precipitation. It has been proven that high-valence cations differ in their ability to capture free oxygen, with the order of strength being Al3+ > Mo6+ > B3+ and Si4+. It is the strong ability of Al3+ to capture free oxygen and the formation of Al[4]–Ca2+–Mo[6] linkages that are responsible for inhibiting molybdate crystallization in the glass. An intriguing and important abnormal crystallization behavior was observed: a slight substitution of Na2O with CaO resulted in CaMO4 crystal precipitation, whereas larger substitutions paradoxically suppressed it. The findings reveal that in CaO–Na2O mixed aluminum borosilicate glasses, Al[4] preferentially attracts Na+ over Ca2+ to compensate for its negative charge. Meanwhile, Ca2+ ions are capable of forming an Al[4]–Ca2+–Mo[6] linkage, which Na+ ions cannot achieve. This fundamental difference results in the abnormal precipitation of CaMO4 crystals.
研究领域:
材料科学
·
核废料处理
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DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Hangtao Ye,Qin Wang,Ziyao He,Yao Tong,Wei Xia,Hongbin Fan,Weidong Xiang,Xiaojuan Liang
In recent years, silicon (Si) photodetectors (PDs) have been widely used in daily life, but the ultraviolet (UV) region response is extremely low, while perovskite nanocrystals (NCs) can be used as a light conversion layer to effectively improve the UV region detection performance due to their high absorption coefficient. At the same time, embedding NCs into a glass matrix can protect NCs from the adverse external environment, which can greatly prolong the effective working time of the detector. In this work, a series of perovskite NC glasses (PNGs) with intrinsic emission but still maintaining high transmittance were fabricated successfully by regulating the concentration of CsPbCl2Br1 NCs. Furthermore, the rare-earth ion Tb3+ was successfully introduced into CsPbCl2Br1 NCs, achieving energy transfer of the exciton to Tb3+, and the photoluminescence quantum yield (PLQY) had a big boost from 11.1 to 28.1%. In the end, the prepared CsPbCl2Br1:Tb3+ PNG was first integrated with Si PDs, and the UV responsibility of Si PDs was enhanced due to the absorption of CsPbCl2Br1 PNG doped with Tb3+ in the UV region. At 320 nm, the responsivity of Tb3+-doped CsPbCl2Br1 PG-Si PDs is significantly higher than that of bare Si PDs. In addition, CsPbCl2Br1:Tb3+ PNG-Si PDs maintained excellent photocurrent stability. The CsPbCl2Br1:Tb3+ PNGs are expected to be one of the optimum semiconductor materials for next-generation high-performance UV PDs.
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高影响因子
Journal of Materials Chemistry B
·
2017
·Vol. 5
·期 31
·6376-6384
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IF 4.543
Xian Li,Qiming Liang,Wen Zhang,Yuli Li,Jiandong Ye,Fujian Zhao,Xiaofeng Chen,Shiren Wang
Bio-inspired pinecone-like bioactive glasses consisting of ordered thin-layers separated by consistent cavities were synthesized using a sol–gel process. The short diameter of the as-produced particles was as short as 161 nm, and the surface area was as high as 280 m2 g−1. The pore volume, ranging from ∼0.74 cm3 g−1 to ∼0.67 cm3 g−1, could be modulated by the aqueous ammonia concentration. The surface was further tailored for positive charges by amino grafting. The as-produced nanoparticles could successfully enter cells via endocytosis. The microRNA delivery of the bioactive glass particles was further investigated by fluorescence microscopy and flow cytometry, indicating a loading efficiency and transfection efficiency greater than 90%. The potential of such particles as drug carriers was also studied. CCK8, live–dead cell staining and PI/annexinV double staining analyses confirmed that the bioactive glass particles loaded with antitumour doxorubicin (DOX) significantly accelerated the apoptosis of tumour cells. These bio-inspired bioactive glasses are promising as novel vectors for drug and microRNA delivery with high efficiency.
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DOI
PubMed
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
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2021
·
IF 3.531
Xianying Shao,Yuebo Hu,Yujun Zhao,Shunwei Chen,Lei Liu,Jinmiao Chen,Junhao Li
Mineralizers can efficiently promote the transition of barium aluminosilicate (BaAl 2 Si 2 O 8 , BAS) from hexacelsian to celsian (H-M). However, the detailed mechanism regarding the phase transformation of BAS is still unclear, especially in different glass systems. Herein we systematically studied the crystallization behaviors of SiO 2 -Al 2 O 3 -BaF 2 glass in supercooled oxyfluoride aluminosilicate liquids with increasing Na 2 O concentration, and the influence of crystal phases precipitated from the precursor glass on the dielectric properties of oxyfluoride aluminosilicate glass ceramics was analyzed. We observed that the high addition of Na 2 O promoted no transformation of H-M, but resulted in the precipitation of second phases (e.g., NaAlSi 2 O 6 , Ba 3 AlF 9 ). Our results provide guidance for designing glass ceramics containing celsian (Monoclinic BAS) nanocrystals with superior thermodynamically stable and dielectric characters.
研究领域:
材料科学
·
无机化学
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DOI
高影响因子
2D Materials
·
2018
·Vol. 5
·期 3
·035036
·
IF 7.042
Shixin Liu,Jianping Ji,Haibo Zeng,Zheng Xie,Xiufeng Song,Shuyun Zhou,Ping Chen
Hexagonal boron nitride nanosheets (h-BNNSs) with unique properties, including wide band gap, excellent thermal conductivity and thermal stability, are among the most promising 2D inorganic nanomaterials in recent years. Functionalization of h-BNNSs is necessary to prevent them from strong tendency to agglomeration and to improve their dispersity and interfacial properties in solvents and polymer composites. In this work, amino and silane functionalized h-BNNSs were obtained, respectively. The chemical-bonding amino and silane functionalization of h-BNNSs were verified by FTIR, XPS and TG-MS analyses. The functionalized h-BNNSs show higher concentration, improved compatibility and dispersity in solvents and gel matrices after doping them into organically-modified silicate gel glasses using a sol-gel method. The functionalized h-BNNSs have broadband absorption and their doped glasses show high transmittances in the visible and near-infrared regions. The nonlinear optical properties of the functionalized h-BNNSs and their doped glasses were measured using Nd:YAG laser system and the doped glasses show broadband optical limiting responses at 532–1570 nm with the lowest onset threshold of 9 mJ cm−2. The optical limiting mechanisms investigated through Z-scan technique were nonlinear absorption. This work indicates that the functionalized h-BNNSs and their doped glasses are promising candidates for nonlinear optical, optical limiting and other optoelectronic materials and devices.
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Xiaoman Li,Ruijin Fan,Pengfei Zhai,Xinyu Liu,Huijun Liu,Shitong Xu,Rongfei Wei,Hai Guo
The demands for white-light-emitting materials are becoming more and more rigorous. In this work, a novel kind of Sn 2+ /Mn 2+ doped phosphate aluminum calcium glass was fabricated by a traditional melt-quenching technique. Broadband excitation and emission of Sn 2+ ions were detected in Sn 2+ single-doped glass samples. By the modulation of excitation wavelength, tunable broadband cyan-blue light emissions of Sn 2+ were also realized. Combined with the red light emitting of Mn 2+ ion, a nearly white light with a good chromaticity coordinate (0.339, 0.298) and a relatively low correlated color temperature (CCT) of 5107 K were obtained in Sn 2+ /Mn 2+ codoped glasses due to the energy transfer process from Sn 2+ to Mn 2+ ions. In addition, after two cycles of heating and cooling treatment, the emission intensity of Sn 2+ doped glass sample remained 97.9% of the initial emission intensity at 300 K. All of these results reveal that these Sn 2+ /Mn 2+ doped aluminum calcium phosphate glasses have good resistance to thermal impacts and have prospects in white-light-emitting diodes (W-LEDs) fields.
研究领域:
材料科学
·
光学
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DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2017
·
IF 2.124
Idris Kabalci,Jiayu Zheng,Liping Wang,Linling Tan,Yafei Xue,Ziyang Zhang,Mingying Peng
Tellurite based glasses have been prepared with various glass compositions such as yBi 2 O 3 -xZnO-(100 − x − y)TeO 2 glass system (y = 0.2, 1.0, 2.0, 3.0, 4.0, 5.0, and 8.0 mol% ratio and x = 14, 19, 19.8, and 20 mol%). The purpose of the work is to investigate the effect of glass compositions on the structure and hardness under the indentation loading test. Up till now, the experiences of the preparation of tellurite based glasses showed that it has high fragility structure at room temperature compared to boroxide, and chalcogenide-based glass materials . In this study, the thermal, mechanical and structural properties of Bi - based tellurite optical glass materials were investigated at room temperature. Results indicated that increased refractive index ratio of Bi has pronounce effect upon the transition temperature while the hardness value of the lassy material showed a reduction in response to this increased refractive index value of Bi. The obtained results further could be correlated with compositions that effects on the structural changes [for TeO 4 (tbp) to TeO 3 (tb)] having non-binding oxygen (NBO) due to the elastic deformation of Te O bonding and expansion of interatomic distances when considered the data of the Vickers' hardness, FT-IR, and Raman spectra . Here, it can also be emphasized that obtained the thermal stability, (T = T x − T g ), of the glass material, decreases from 80 to 37 °C as the melting temperature increases from 800 to 1025 °C, possibly leading to a decrease in microhardness and deformation in the glass materials.
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DOI
高影响因子
Science China-Materials
·
2019
·Vol. 62
·期 6
·864-872
·
IF 5.636
Liu Shiyu,Yu Yao,Liu Lin,Wu Yue
When a liquid is supercooled, its structural equilibration time τ eq increases sharply approaching the glass transition temperature T g , below which it is kinetically arrested in the out of equilibrium glassy state. Upon annealing below T g , such glassy state relaxes toward the equilibrium state. There is growing evidence that such relaxation process is quite complex, influenced by the complexity of the potential energy landscape. Here we report the observation of a hierarchical aging pathway in the process of the glass-to-supercooled liquid transition in various molecular glass forming systems. Differential scanning calorimetry reveals that the glassy state upon annealing below T g firstly enters a transient metastable supercooled liquid state with slightly higher enthalpies than that of the equilibrium supercooled liquid state when extrapolated to below T g . This observation is also confirmed by structural measurements via Raman scattering. The dynamics of the transient metastable-to-stable supercooled liquid transition exhibits characteristics of thermodynamic transition at spinodal temperature T sp slightly above T g , leading to anomalous behaviors such as the appearance of a transition-like behavior in the plot of fragility measurements. These observations imply that the free energy landscape of the supercooled liquid develops complexity with qualitative changes approaching T g and could have strong influence on the process of the glass transition.
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高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2014
·
IF 1.716
Xijia He,Jianbei Qiu,Yong Yang,Dacheng Zhou,Xuhui Xu,Shengxian Wei
Bismuth doped calcium germanate glasses were prepared, and the relationship between Bi near-infrared (NIR) luminescence and the glass structure was investigated. The NIR emission with 808 nm excitation covered the whole optical telecommunication window. The intensity of the NIR emission increased firstly and then declined with the increasing CaO content, which cannot be explained by the theory of optical basicity . The X-ray photoelectron spectroscopy (XPS) and the visible luminescence spectra showed that the trivalent Bi 3+ could reduce to lower state of Bi in these glasses. The Fourier transform infrared (FT-IR) absorption spectra and Raman spectra indicated that the major structure units were [GeO 4 ] tetrahedral, and the 4-membered [GeO 4 ] rings converted into 3-membered [GeO 4 ] rings with the increasing optical basicity . The nature of NIR emission and the reason of the abnormal phenomenon were discussed.
研究领域:
材料科学
·
光子学
·
光学材料
·
玻璃化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Zelong Zhang,Linli Shen,Yi Zhao,Yujie Zhang,Haisheng Yang,Weidong Xiang,Xiaojuan Liang,Guoxin Chen,Haitao Yu
Many previous studies have reported that because of the large difference between the ionic radii of Cl and I, halogen exchange is difficult to occur between CsPbCl 3 and CsPbI 3 perovskite nanocrystals, and the interaction between CsPbCl 3 and CsPbI 3 NCs will lead to their dissolution. In this work, two kinds of nanocrystals, CsPbCl 3 and CsPbI 3 , were successfully crystallized simultaneously in glass by an in-situ growth method for the first time. Because of the effective reabsorption of photons, the CsPbCl 3 :CsPbI 3 nanocrystals displayed higher fluorescence emission intensity and higher photoluminescence quantum yield than those of CsPbI 3 nanocrystals. In addition, CsPbCl 3 :CsPbI 3 nanocrystal glasses showed excellent water resistance and thermal stability, which benefited from the effective protection of the glass matrix. In particular, the fluorescence intensity of the nanocomposites remained above 95% after immersion in water for 60 days. Light-emitting devices were prepared by combining a near-infrared-emitting CsPbCl 3 :CsPbI 3 nanocrystal glass and 400 nm LED chip, which were applied to indoor plant growth.
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高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2019
·
IF 2.6
Wei Zhao,Kunfeng Li,Peng Lin,Kai Xu,Shengheng Tan
Some particular hazardous and nuclear wastes containing a large amount of chlorine would cause the problematic processing during the waste vitrification, because of the low solubility of Cl in silicate glasses . Although a few works reported the chlorine behavior in aluminosilicate glasses, the results do not always show the consistency and a small variation of glass compositions may cause the significant changes. The present work studied the dissolution of Cl in the range of alkaline earth aluminosilicate glasses with the nominal mole composition of 50SiO 2 -10Al 2 O 3 -40AeO (Ae = Ca, Sr or Ba). The solubility of Cl in the glasses with different alkaline earth species followed the order of Ca (~8.1 wt%) > Sr (~6.0 wt%) > Ba (~3.5 wt%). The glass density and glass transition temperature decreased with the addition of Cl in three types of glasses, and AeCl 2 salts, identified with X-ray diffraction, segregated from the glasses, when Cl addition exceeds its solubility. Raman spectra indicate the dissolution of Cl leads to the increase of bridged oxygen bonds in glasses, supposing that Ca 2+ ions are attracted by Cl − ions, leaving the non-bridging oxygens that initially associated with Ca 2+ ions are bonded to Si 4+ (Al 3+ ) to become bridging oxygens.
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高影响因子
危险品化学品经营许可证（带存储）