JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2020
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IF 4.495
Qinghong Meng,Xuejiao Wang,Qi Zhu,Ji-Guang Li
A series of phase-pure [(Gd 0.6 Lu 0.4 ) 0.99 Ce 0.01 ] 3 [Al 1- z (Mg/Si) z ] 5 O 12 ( z = 0-0.10) garnet phosphor powders were prepared via gel-combustion, which were then sintered into ceramics (up to 1550 °C) under atmospheric pressure. Dilatometry revealed that equimole of Mg 2+ /Si 4+ substitution for Al 3+ accelerates densification and lowers the activation energy for grain boundary diffusion in the intermediate stage of sintering (∼1150–1370 °C), which was assayed to be ∼353 kJ/mol for z = 0 and ∼289 kJ/mol for z = 0.10. The acceleration effects of Mg 2+ /Si 4+ on sintering and grain growth were further demonstrated by the results of ramp and holding sintering. Firing at 1550 °C for 4 h also produced ∼99 % dense ceramics for the Mg 2+ /Si 4+ codoped garnet powders. Through considering crystal splitting of the Ce 3+ 5d energy level, photon-phonon coupling, and crystal structure/microstructure, the influences of Mg 2+ /Si 4+ content and material form on Ce 3+ luminescence, including intensity, external/internal quantum efficiencies, emission wavelength, CIE color coordinates and decay time, were clarified in detail.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2016
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IF 3.014
Renping Cao,Ting Fu,Haidong Xu,Wenjie Luo,Dedong Peng,Zhiquan Chen,Jingwei Fu
CaTiO 3 :Bi 3+ and CaTiO 3 :Bi 3+ , Al 3+ /B 3+ phosphors are synthesized by solid-state reaction method in air. With excitation 272 and 320 nm, broad PL band peaking at 555 nm with full width at half maximum ∼200 nm is observed in the range of 400–800 nm due to the 3 P 1,0 → 1 S 0 transitions of Bi 3+ ion. PLE spectrum monitored at 555 nm contains two PLE band peaking at ∼272 and 320 nm within the range 230–420 nm owing to metal-to-metal charge-transfer and 1 S 0 → 3 P 1 transition of Bi 3+ ion, respectively. The optimal Bi 3+ doping concentration in CaTiO 3 :Bi 3+ phosphor is about 0.5 mol%. Luminescence properties of CaTiO 3 :Bi 3+ phosphor may be improved obviously by co-doping Al 3+ /B 3+ ions, and its emission intensity can be enhanced 13–15 times after Al 3+ ion is co-doped. Luminous mechanism of CaTiO 3 :Bi 3+ phosphor is analyzed by energy level diagram of Bi 3+ ion. Decay curve and time-resolved spectra confirm that only a single type of Bi 3+ luminescence center exists in CaTiO 3 :Bi 3+ phosphor.
研究领域:
材料科学
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光学
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发光材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of Advanced Ceramics
·
2022
·Vol. 11
·期 5
·742-753
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IF 11.534
Guo Meng,Liu Yufeng,Zhang Fengnian,Cheng Fuhao,Cheng Chufei,Miao Yang,Gao Feng,Yu Jun
A series of high-entropy perovskite oxides (HEPOs) La(CoCrFeMnNiAl x ) 1/(5+ x ) O 3− δ ( x = 0.4, 0.5, 0.6, and 0.7) have been synthesized by coprecipitation method combined with calcination process and explored as electrodes for supercapacitors. The crystal structure, microstructure, and elemental composition of HEPOs were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy-dispersive X-ray spectroscopy (EDS) in detail. The electrochemical properties of HEPOs as supercapacitor electrodes were elucidated. The specific capacitances of HEPOs ( x = 0.4, 0.5, 0.6, and 0.7) are 281.84, 353.65, 325.60, and 259.30 F/g at the current density of 1 A/g, respectively. After 2000 cycles, the specific capacitances of HEPOs ( x = 0.4, 0.5, 0.6, and 0.7) remain 85.01%, 88.61%, 86.37%, and 91.25%, respectively. Such outstanding electrochemical properties can be attributed to the entropy-stabilized structure caused by mixed six cations in B-site and the Al 3+ -doping suppressing active ion aggregation during charge—discharge process. This research highlights the potential of HEPOs as electrodes for supercapacitors.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
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2013
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IF 1.789
Shibu Zhu,Xin Tian,Liming Shan,Zhaoying Ding,Zhengxing Kan,Xiaoling Xu,Zuowan Zhou,Li Wang
ZnO nanorod arrays were synthesized by an aqueous solution process with Al 3+ as an adjusting agent, and their performances as photoanodes of dye-sensitized solar cells (DSSC) were investigated. The ZnO nanorods were characterized by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). It was found that adding Al 3+ during the growth procedure not only changed the morphology and aspect ratio but also affected the chemical features of the ZnO nanorods. The ZnO nanograss films were evaluated as photoanodes for DSSC. The photovoltaic results showed that the overall conversion efficiency of DSSC based on ZnO nanorods obtained from the growth solution containing 2 at% Al 3+ was increased by 55.6% as compared to that without Al 3+ . This significant improvement was attributed to the reduced charge recombination and enhancement of the electron lifetime.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
ACTA MATERIALIA
·
2021
·
IF 8.203
Enbo Li,Wen Ma,Peng Zhang,Chennan Zhang,Yu Bai,Hongxia Liu,Shufang Yan,Hongying Dong,Xiangfeng Meng
A series of Al 3+ -doped SrZrO 3 perovskite powders with low infrared emissivity were prepared. The doping-effect of Al 3+ on infrared radiation ability and thermophysical properties was investigated in detail by theoretical and experimental methods. As a result, Al 3+ -doped SrZrO 3 perovskite's infrared emissivity is related to its electronic structure and particle morphology . It can be adjusted by the Al 3+ -doped concentration. The SrZr 0.86 Al 0.14 O 2.935 powder with stronger electronic conductivity and flake particles has the lowest infrared emissivity with 0.256 in 3-5 μm waveband at 590 °C and 0.383 in 8-14 μm waveband at 550 °C. Al 3+ -doped SrZrO 3 perovskites still maintain ideal thermal stability and low thermal conductivity above 800 °C. Base on both low infrared emissivity and thermal conductivity, Al 3+ -doped SrZrO 3 tablets exhibited weaker thermal radiation intensity in the high-temperature condition and might be the potential low thermal infrared materials servicing under extreme temperature in the future.
研究领域:
材料科学
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物理学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 52
·期 1
·412-419
·
IF 5.6
Jian Lan,Aihua Zhou,Yi Zhang,Yuanxue Cai,Chengguo Ming
To overcome the limitations of static fluorescent anti-counterfeiting, this study proposes a dynamic encryption method based on the afterglow of materials. Through defect engineering, Cu 2+ single-doped and Cu 2+ /Al 3+ co-doped NaGaO 2 (NGO) phosphors were synthesized. The doping of Al 3+ enhances the yellow emission at 610 nm through lattice distortion and defect optimization, while effectively modulating the decay kinetics of Cu 2+ . Millisecond-level lifetime differences were achieved under same-color emission, enabling temporal information encryption. This approach breaks the conventional reliance on multi-color systems and realizes dual-dimensional encoding in both color and time, offering a high-capacity, counterfeit-resistant anti-counterfeiting strategy.
研究领域:
材料科学
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光学材料
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固态化学
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防伪技术
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光致发光
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2017
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IF 5.401
Lingjie Hou,Jia Feng,Yubin Wang,Chuan Dong,Shaomin Shuang,Yu Wang
An efficient fluorescein based probe (H 2 L) for the dual sensing of Al 3+ and Cu 2 + has been synthesized and characterized. H 2 L was highly selective toward these two ions with different fluorescence signals and binding modes in two different media. In EtOH-H 2 O (3:2, v/v; pH 4.0), H 2 L selectively binds Al 3+ to form a 1:1 ligand/metal complex, giving rise to a visible pale pink-to-yellow color change and fluorescence enhancement at 440 nm, while in CH 3 CN-H 2 O (2:3, v/v; pH 7.2), H 2 L and Cu 2+ form a 1:2 ratio complex, resulting in a color change from pink to orange-yellow and a significant fluorescence enhancement at 520 nm. The binding modes were confirmed by fluorescence, absorption, IR, ESI-MS and 1 H NMR titrations. The detection limits were calculated to be 7.32 × 10 −8 M and 1.47 × 10 −8 M for Al 3+ and Cu 2+ , respectively. Cell imaging studies demonstrate that this sensor is capable of sensing Al 3+ and Cu 2+ in living cells.
研究领域:
分析化学
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材料科学
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生物化学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
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2017
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IF 4.811
Xiancai Jiang,Nanping Xiang,Jinquan Wang,Yulai Zhao,Linxi Hou
Development of bio-based hydrogels with good mechanical properties is of great importance for their excellent biocompatibility and biodegradability. In this paper, chitosan (CS) based double network (DN) hydrogel was prepared by dissolving CS in AlCl 3 ·6H 2 O aqueous solution instead of acetic acid solution. After dissolving acrylic amide (AM), acrylic acid (AA), N, N’-methylenebisacrylamide and 2-hydroxy-4′-(2-hydoxyethoxy)-2-methylpropiophenone were added into the CS/Al 3+ solution and the CS/PAMAA-Al 3+ DN hydrogel was prepared by UV polymerization. The hybrid physical and chemical crosslinked network hydrogels were prepared. The tensile and compression properties of CS/PAMAA-Al 3+ DN hydrogel were studied. The results showed that the CS/PAMAA-Al 3+ DN hydrogels have high toughness, stretch-ability, and excellent shape recovery properties. The CS/PAMAA-Al 3+ DN hydrogel could show the tensile strength of 0.54 MPa and elongation at break of 2203.7%. These properties arise from the dynamic ionic interaction between Al 3+ and CS/PAMAA macromolecular chains.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Yujiao Guo,Yue Yu,Ping Ning,Jiangzhao Chen
Spinel LiMn 2 O 4 has the potential to be used as a cathode material in lithium-ion batteries because of its affordability, low toxicity, and excellent charge/discharge capability. However, severe capacity attenuation results from the degradation of its long-cycle and high-rate performance caused by the Jahn-Teller distortion and Mn dissolution. Herein, a simple solid-state combustion process is used to successfully prepare the Mg 2+ -Al 3+ co-doped LiMn 2 O 4 with truncated octahedral morphology. The Jahn-Teller distortion is inhibited by the stable Mn-O framework and the decreased lattice constant, which in turn lowers the dissolution of Mn. Moreover, Mg 2+ -Al 3+ co-doped LiMn 2 O 4 have lower activation energy and greater Li + diffusion coefficient. As a result, the optimized LiMg 0.03 Al 0.10 Mn 1.87 O 4 delivers satisfied initial capacity of 102.1 mAh‧g −1 with a capacity retention of 76.2 % after 1000 cycles at 10 C. Even at the ultra-high rate of 15 C and 20 C, Mg 2+ -Al 3+ co-doped sample also remain desired structure stability and cycling performance, which remains 73.8 % of its original capacity after 1000 cycles at 20 C. This work provides a reference for developing high-performance and stability cathode materials for lithium-ion battery.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2024
·
IF 6.5
Zekai Mei,Shuting Ma,Shuzhen Ni,Weisheng Yang,Hongqi Dai,Fangong Kong
Recently, there has been significant attention given to the development of oil-water emulsion separation filters made from renewable and inexpensive wood for the separation and purification of oily wastewater. However, the relatively large pore sizes of wood cross-section slices make it challenging to effectively separate emulsified oils (5–20 μm) in wastewater. We propose constructing a dense superhydrophilic layer of Al 3+ -carboxymethyl cellulose on the surface of a wood filter using a dip-coating process for separating oil/water emulsions. The Al 3+ -CMC layer exhibits stable surface superwettability with θ oil > 160° under water, which repels the non-polar oil phase and selectively allows water to pass through. The wood filter optimized for emulsion separation can achieve an efficiency of 96.32 % and a filtration flux of 410 L m −2 h −1 bar −1 . It maintains stable recyclables even after 6 cycles. The Al 3+ -CMC@DW filter shows considerable potential for practical applications in oil/water emulsion separation.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Enbei Yang,Han Ma,Qiang Zhou,Mengyan Yang,Yurong Guo,Jing Wan,Huaijun Tang,Zhengliang Wang
The luminescence enhancement of near-infrared (NIR) emissive material is critical in emerging applications. In this work, we have prepared an NIR-emitting K 2 NaSc 1- x - y Al x F 6 : y Cr 3+ (denoted as KNS 1- x - y A x F: y Cr) solid solution phosphor via the introduction of Al 3+ , enhancing luminescence in a high-temperature solid-state reaction. The resultant solid solution phosphor exhibited a broad NIR emission band with a high internal quantum efficiency (IQE = 81.1 %) and an enhanced photoluminescence thermal stability (93 % at 423 K) under 432 nm excitation. When compared with the Al-free sample, the IQE and thermal stability are increased by 45.9 % and 22.4 %, respectively. The optimal Cr 3+ and Al 3+ doping content has been determined and a composition-optimized KNS 0.70 A 0.25 F 6 :0.05Cr phosphor is demonstrated by fabricating an NIR pc-LED device as a light source for light-emitting diode applications.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2023
·
IF 4.5
Qiushuang Li,Bing Zhao,Xiangdong Kong,Liyan Wang,Wei Kan,Bo Song,Rui Yu,Pengfei Zhang
Designation and application of the luminescent COFs remains a tough challenge and imperative task because of their limited building block structure, the unavailable raw material, the tedious modification process, or the onefold sensing function. Herein, a fluorinated fluorescent covalent organic framework containing a phenanthro[9,10- d ]imidazole moiety [TFPB-PI(F)–COF] had been successfully designed for Cu 2+ and Al 3+ detection relayed by PO 4 3− . TFPB-PI(F)–COF serves as a highly sensing platform with the superior selectivity toward Cu 2+ and Al 3+ based on the coordination interaction and the chelation enhancement quenching (CHEQ) effect, and the detection limits are 2.3 and 4.2 n mol L −1 , respectively. Subsequently, accompanied with the gradual introduction of PO 4 3− , TFPB-PI(F)–COF@M (Cu 2+ and Al 3+ ) complex is wrecked due to electrostatic attraction with the detection limit of 10 n mol L −1 , led to the fluorescent recovery of TFPB-PI(F)–COF. Furthermore, the reversible fluorescent performance by the mode of “on–off–on” is perfect. Besides, the established relayed method can be successfully employed for the analysis of Cu 2+ and Al 3+ in environmental water samples with recoveries of 96.00–104.63 % and RSD <4.62 %. Moreover, the fluorescent images for the visual detection of Cu 2+ is also fabricated in living HeLa cells, which provides a modest contribution and an effective platform to the biological analysis.
研究领域:
化学传感器
·
材料科学
·
生物分析
✓ 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）