JOURNAL OF MATERIALS SCIENCE
·
2013
·Vol. 48
·期 15
·5140-5147
·
IF 2.163
Gai Guangqing,Wang Liyan,Dong Xiangting,Xu Shuzhi
Fe 3 O 4 /PVP//Tb(BA) 3 phen/PVP magnetic–photoluminescent bifunctional bistrand aligned composite nanofibers bundles based on Fe 3 O 4 nanoparticles (NPs) and terbium complex Tb(BA) 3 phen (BA = benzoic acid) were fabricated by employing a parallel axial electrospinning setup and were characterized by X-ray diffraction, field-emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), transmission electron microscopy, fluorescence spectroscopy, and vibrating sample magnetometer. It is found that Fe 3 O 4 NPs were only dispersed into one strand of the bistrand aligned composite nanofibers bundles, but no nanoparticles in the other strand. And the average diameter of the individual strand fiber was 200 ± 25 nm. The bistrand aligned composite nanofibers bundles exhibit strong green emissions under the excitation of 275 nm ultraviolet light, and the 5
D
4 → 7
F
5 hypersensitive transition at 545 nm was the predominant emission peak of Tb 3+ ions. The newly obtained bifunctional nanofibers bundles exhibit excellent magnetism and high fluorescence intensity and are expected to apply in biology cell separation, magnetic resonance imaging, drug deliver, and fluorescence immunoassays/imaging.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
Renping Cao,Yunling Cao,Ting Fu,Shenhua Jiang,Wensheng Li,Zhiyang Luo,Jingwei Fu
Novel red phosphors R 3 P 4 O 13 :Bi 2+ (R = Sr and Ba) are synthesized by solid state reaction method in air, and their crystal structures and fluorescence properties are characterized. The excitation bands peaking at ∼440 nm match with the blue LED chip, and their red emission band peaking at ∼658 and 686 nm within the range 580–800 nm owing to 2 P 3/2 (1) → 2 P 1/2 the transition of Bi 2+ ions can be observed, respectively. The relation between Bi 2+ doping concentration and emission intensity is discussed and the optimal Bi 2+ ion doping concentration is ∼3.0 mol%. Decay curves and time-resolved spectra confirm that R 3 P 4 O 13 :Bi 2+ (R = Sr and Ba) phosphors have only single Bi 2+ center. The luminous mechanism is explained by energy level diagram of Bi 2+ . The luminescence properties indicate that R 3 P 4 O 13 :Bi 2+ (R = Sr and Ba) phosphors have a potential to be used as red emitting phosphor candidate for white LEDs based on ∼440 nm blue LED chip.
研究领域:
材料科学
·
光学
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DOI
高影响因子
MATERIALS CHARACTERIZATION
·
2021
·
IF 4.342
Kangkang Yuan,Qing Cui,Jie Li,Xiaotong Jin,Chengshun Li,Xingxiang Ji,Zhongjian Tian,Xinqiang Wang
A compositionally complex (Ca, Sr, Ba)ZrO 3 (CC-CSBZ) fibrous membrane with perovskite structure was successfully prepared via a simple electrospinning method. The formation, phase transformation and microstructure evolution of CC-CSBZ fibers were fully discussed. X-ray diffraction, Raman spectra and transmission electron microscopy analyses confirmed the formation and phase transformation of CC-CSBZ solid solution at high temperatures. Scanning electron microscopy results indicated that a slower grain growth rate and more stable high-temperature microstructure were achieved for CC-CSBZ fibers compared with previous BaZrO 3 and CaZrO 3 fibers. CC-CSBZ fibrous membrane also exhibited excellent flexibility at 1000 °C and high thermal stability at 1200 °C. Furthermore, an average near infrared reflectivity of 98% at least at room temperature was obtained for CC-CSBZ fibrous membrane heat-treated from 800 to 1400 °C. For the slow grain growth rate, excellent high-temperature stability and near infrared reflectance, CC-CSBZ fibrous membrane would be a promising and novel ceramic fiber product for high temperature applications.
研究领域:
材料科学
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陶瓷工程
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DOI
高影响因子
Journal of Materials Chemistry B
·
2021
·Vol. 9
·期 33
·6691-6702
·
IF 6.331
Xiangji Liu,Yihang Ma,Minjiang Chen,Jiansong Ji,Yuhang Zhu,Qingsan Zhu,Min Guo,Peibiao Zhang
Hydroxyapatite (HA) is the most commonly used orthopedic implant material. In recent years, the emergence of cationic doped hydroxyapatite has revealed more possibilities for the biological application of HA. Conventional HA does not promote new bone formation because of its poor osteoinductive activity, and has a similar density to that of bone, leading to difficulty in distinguishing both via imaging. Magnesium ions are useful for regulating the cellular behavior and promoting bone regeneration. Ba ion related compounds, such as BaSO4, have a strong X-ray shielding effect. In this study, Ba/Mg@HA was synthesized to prepare Ba/Mg@HA/PLGA composites, and we aimed to investigate if Ba/Mg@HA/PLGA composites enhanced bone repair on osteoblasts and tibial defects, as well as the X-ray and CT imaging ability of bone implants in rats. The in vitro experimental results showed that the Ba/Mg@HA/PLGA composites significantly improved the attachment and osteogenic differentiation of MC3T3-E1 cells. These include the promotion of mineral deposition, enhancement of alkaline phosphatase activity, upregulation of OCN and COL-1 gene expression, and increase in COL-1 and OCN protein expression in a time- and concentration-dependent manner. The in vivo experimental results showed that the Ba/Mg@HA/PLGA composites significantly increased the rate of bone defect healing and the expression of BMP-2 and COL-1 in the bones of rats. X-ray and CT imaging results showed that the Ba/Mg@HA/PLGA composites enhanced the X-ray imaging ability. These findings indicate that the Ba/Mg@HA/PLGA composites can effectively promote bone formation and improve the X-ray and CT imaging abilities to a certain extent.
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DOI
PubMed
高影响因子
SOLID STATE SCIENCES
·
2023
·
IF 3.5
Dong Gao,Fuqiang Chen,Hongping Wu,Zhanggui Hu,Jiyang Wang,Yicheng Wu,Hongwei Yu,P Shiv Halasyamani
Heteroanionic materials are of current research interest owing to their varied structural chemistry and properties. Recently, a number of heteroanionic materials have been synthesized that can be used for water splitting, battery materials, thermoelectrics , and nonlinear optical applications. Birefringent heteroanionic materials are still rarely researched. Herein, we report a series of new oxychalcogenides, AGe 2 O 4 Q (A = Ba, Sr; Q = S, Se), that are synthesized by solid-state reactions in fused silica tubes with their structures determined by single-crystal X-ray diffraction. Optical property measurements show that AGe 2 O 4 Q (A = Ba, Sr; Q = S, Se) exhibit large birefringences , 0.13–0.19 @ 1064 nm. These are one-order of magnitude larger than their single-anionic homologue, BaGe 2 O 5 - 0.03 @ 1064 nm. This suggests that constructing heteroanions through using chalcogenides to partially substitute O in tetrahedral foundation building units (FBUs) is a viable method for designing new birefringent materials. Furthermore, the crystal structures, UV–vis–NIR diffuse reflectance spectra, infrared and Raman spectra as well as the first-principles calculations for AGe 2 O 4 Q (A = Ba, Sr; Q = S, Se) are also reported.
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高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Huan Zhou,Jin Zhang,Long-Long Fan,Zhi Yuan,Qi Lu,Gang Liu,Yu-Hong Nie,Yi-Fan Hu,Shen-Dong Xu,Xu-Dong Zhang,Ye-Xin Luo,Hua-Long Zhu,Wei Chang,Yong-Wei Xiong,Hua Wang
Chaohu Lake, a vital freshwater resource for surrounding communities, faces environmental stress due to industrial and mining activities, leading to metal contamination. However, the potential ecotoxicological effects of these metals remain unclear. To address this knowledge gap, we analyzed spatial metal distributions in the lake and developed a Drosophila model exposed to region-specific raw water samples. Our results revealed significantly elevated total metal levels in the western region compared to other areas. Male Drosophila exposed to western raw water exhibited >20% reduced climbing ability and reproductive deficits, suggesting metals as likely contributors to these adverse effects. Notably, the primary characteristics of the observed reproductive dysfunction included a >20% reduction in motor activity and a more than twofold increase in brain aging in offspring following paternal exposure to western water. Comparative analysis with China’s surface water standards identified barium (Ba), molybdenum (Mo), and cadmium (Cd) as key metals in the western region. Crucially, paternal exposure to these metals alone recapitulated the offspring’s motor decline and brain aging. We conclude that Ba, Mo, and Cd may be the key metals responsible for Chaohu Lake water-induced paternal motor/reproductive dysfunction and impaired offspring motor performance, with brain senescence potentially mediating the offspring’s motor deficits.
研究领域:
环境毒理学
·
生态毒理学
·
神经毒理学
·
生殖生物学
·
金属生物学
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淡水生态学
·
遗传学
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 31
·1-11
·
IF 2.8
Li Shanshan,Zhang Duo,Tian Zhongqing,Wang Fei,Meng Fancheng
Ba[(Zn 0.6 Mg 0.4 ) 1/3 Nb (2- x )/3 Sb x /3 ]O 3 (BZMNS, x = 0.15, 0.2, 0.25, 0.3, 0.35) ceramics were synthesized by the conventional solid-state reaction method. The crystal structure and microwave dielectric properties of the ceramics were investigated. X-ray diffraction (XRD) analysis revealed that the BZMNS ceramics exhibit a cubic perovskite structure. The crystal structures were refined, and no secondary phases were detected in all compositions. The doping of Sb 5+ hinders grain growth, and the average grain size first increases and then decreases with the increase of the x value. The dielectric constant shows a downward trend due to the influence of the ionic bond character of B-site ions and the B-site Rattling effect. The packing fraction is the main factor affecting the Q × f value of BZMNS ceramics. As the x value increases, the temperature coefficient of the resonant frequency ( τ f ) gradually decreases. Ion polarizability dilution is the primary mechanism for regulating τ f of BZMNS ceramics. The BZMNS ceramics sintered at 1480 °C with x = 0.3 exhibit optimal microwave dielectric properties ( ε r = 31.44, Q × f = 62,273 GHz (at f₀ = 6.5 GHz), τ f = + 2.48 ppm·°C −1 ), indicating that this ceramic has good application prospects.
研究领域:
材料科学
·
陶瓷
·
微波电子学
·
介电材料
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Asim A. Mohammed,Zhenfei Li,Bo Liu,Dong Yan,Jian Li,Lichao Jia
Protonic ceramic fuel cells (PCFCs) are highly efficient energy conversion devices that operate at relatively low temperatures. Enhancing their performance strongly relies on developing cathode materials with high electrocatalytic activity. This study presents a double-doped perovskite material, Pr 1.5 La 0.3 Ba 0.2 Ni 0.9 Fe 0.1 O 4+δ (PLBNF), where the electrochemical properties are significantly improved through composition and structural tuning. Comprehensive characterization confirms that the co-doping strategy effectively enhances the hydration capability, oxygen reduction reaction (ORR) activity, and operational stability. At 700 °C, the polarization resistances of the PLBNF cathode and the PLBNF-BZCYYb composite cathode are 0.11 and 0.08 Ω cm 2 , respectively, with peak power densities reaching 1012 and 1277 mW cm −2 . Fuel cell tests demonstrate excellent operational stability for the PLBNF-BZCYYb air electrode, indicating its strong potential for application in high-performance proton-conducting ceramic fuel cells. This work provides new insights into the development of efficient fuel cell materials and advances related energy technologies.
研究领域:
材料科学
·
电化学
·
能源材料
·
固体氧化物燃料电池
·
功能陶瓷
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产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Zixuan Tian,Jialing Jiang,Lei Wang,Songtao Dong,Jing Luan,Hongbo Ju
BiCuSeO has attracted significant interest in the field of thermoelectric materials due to its layered crystalline structure, along with advantages such as abundant elemental availability, low thermal conductivity, and outstanding thermal stability. However, the inherently low electrical conductivity of BiCuSeOlimiting overall thermoelectricperformance. To address this, as an effective strategy to enhance thermoelectric performance, BiCuSeO was subjected to tri-element co-doping. Bi 1−3x (CaSrBa) x CuSeO (x = 0.0, 0.02, 0.03, 0.04, and 0.05) ceramics were synthesized using an advanced fabrication process that combined high-energy ball milling with hot-press sintering techniques. Substituting Ca 2+ , Sr 2+ , and Ba 2+ at the Bi 3+ sites effectively optimized the carrier concentration, increased the effective mass, and significantly enhanced the electrical conductivity from 9.67 to 91.55 S cm −1 . Notably, the power factor of the Bi 0.88 (CaSrBa) 0.04 CuSeO sample reached 476.54 μW m −1 K −2 at 323 K. and electrical conductivity. Simultaneously, the introduction of lattice defects through co-doping considerably enhanced phonon scattering, reducing the lattice thermal conductivity to 0.342 W m −1 K −1 for Bi 0.85 (CaSrBa) 0.05 CuSeO, compared with 0.447 W m −1 K −1 for the pristine sample. Consequently, a maximum dimensionless figure of merit ( ZT ) of 0.65 was achieved at 773 K for Bi 0.88 (CaSrBa) 0.04 CuSeO. These findings provide valuable insights into improving the thermoelectric performance of BiCuSeO-based materials through multi-element co-doping.
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高影响因子
GREEN CHEMISTRY
·
2024
·Vol. 26
·期 5
·2763-2772
·
IF 9.3
Lei Guo,Shuaibo Gao,Zuojun Hu,Yongxin Wu,Fangzhao Pang,Huayi Yin,Dihua Wang
Green metal-electrode batteries call for the clean production of s-block metals. Herein, we developed an electrolysis–displacement–distillation (EDD) approach for producing s-block metals with low-carbon emissions and no chlorine gas evolution. The clean production stems from the choice of a molten NaCl–Na2CO3 electrolyte to prevent chlorine gas evolution, an inert nickel-based anode to produce oxygen, and a liquid metal cathode to make the cathodic product (e.g., Na–Sn) sit at the bottom of the electrolytic cell. Later, M–Sn (M = Li, Mg, Ca, Sr, and Ba) alloys were successfully prepared by a displacement reaction between the Na–Sn alloy and molten NaCl–LiCl, NaCl–MgCl2, NaCl–CaCl2, NaCl–SrCl2, or NaCl–BaCl2 with a displacement efficiency of >96.0%. Furthermore, Li, Mg, Ca, Sr, and Ba metals were separated from M–Sn alloys using vacuum distillation with a separation rate of >95.0%. We achieved a current efficiency of 81.0% for the electrolytic production of 100 kg of a liquid Na–Sn alloy, which holds promise to produce s-block metals at a large scale.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 16
·6163-6172
·
IF 3.288
Dayu Huang,Peipei Dang,Xiao Xiao,Biao Bai,Hongzhou Lian,Qingguang Zeng,Jun Lin
It is necessary to develop novel high-efficiency red or far-red-emitting LEDs in order to facilitate the phosphor-converted light-emitting diodes (pc-LEDs) for plant growth. This work reports a series of novel far-red emitting (Ba,Sr)LaZnTaO6:xMn4+ phosphors with double perovskite structure synthesized by the traditional high-temperature solid-state reaction (SSR). The crystal structure and morphology of (Ba,Sr)LaZnTaO6 were investigated by high-resolution TEM, SEM, and XRD Rietveld refinement. The photoluminescence properties were systematically explored and analyzed by diffuse reflectance (DR) spectra, photoluminescence emission (PL) and excitation (PLE) spectra, decay curves, and temperature-dependent spectra. Mn4+ ions occupy Ta5+ sites located at the [TaO6] octahedral emitting red light with the peak at 698 nm in BaLaZnTaO6:Mn4+ and 695 nm in SrLaZnTaO6:Mn4+ under n-UV and blue light excitation. The critical quenching concentration of Mn4+ was determined to be 0.008. The concentration quenching mechanism could be a dipole–dipole interaction between the Mn4+ ions. In addition, the PL intensity of (Ba,Sr)LaZnTaO6:xMn4+ phosphors decreases with increasing temperature. The SrLaZnTaO6:xMn4+ sample has better thermal stability than BaLaZnTaO6:xMn4+. Interestingly, (Ba,Sr)LaZnTaO6:0.008Mn4+ exhibits outstanding internal quantum efficiency (IQE ≥ 80%). Finally, the fabricated LEDs were combined with SrLaZnTaO6:0.008Mn4+ phosphors combined with 460 nm InGaN chips, which emit blue and red light. Based on the above properties, the rare-earth-free (Ba,Sr)LaZnTaO6:xMn4+ phosphors have great potential in being applied as far-red emitting phosphors in high-power plant growth LEDS.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Wang Dehua,Jiang Longlong,Yu Yang,Lu Ye,Meng Zifei,Bian Rui,Yao Wenle,Zhang Yongcheng,Long Yunze,Wang Xiaoxiong
Traditional inorganic ceramic materials usually exhibit macroscopic rigidity due to the incompatibility to the flexibility mechanism of traditional flexible materials such as sliding of polymer chains or atoms. Recently, new form of nanotechnology has been proposed to be capable of preparing inorganic flexible materials. In this paper, inorganic luminescent material (Ba,Ca)TiO 3 :Pr 3+ was prepared into the flexible form by electrospinning technology, and the macroscopic flexibility of pure inorganic (Ba,Ca)TiO 3 :Pr 3+ was systematic investigated. The crystal grain size was found to grow after higher temperature calcination , which benefits luminescence. However, lowering the calcination temperature will further optimize the flexibility of the membrane. This study shows that fibrous membrane fabrication is an applicable flexible fabrication strategy for inorganic oxides , which provides an important reference for the design of flexible materials.
研究领域:
材料科学
·
纳米技术
·
发光材料
·
陶瓷
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DOI
高影响因子
危险品化学品经营许可证（带存储）