Journal of Magnesium and Alloys
·
2022
·
IF 11.813
Xinfang Zhang,Ruihong Li,Xiaoyan Feng,Xue Pang,Xu He,Zili Jin,Huiping Ren,Dashuang Wang,Kailin Li,Xingjian Dai,Zhilan Du,Quan Zhou,Yuxin Zhang
A hierarchical superhydrophobic Al-Li layered double hydroxide (LDH) films with different Li + /Al 3+ molar ratios of 1:1, 1:2, 2:1, pH value of 11.5 and reaction temperature of 125 °C, have been fabricated on the surface of Mg-5Li-1Al (LA51) alloys by hydrothermal method following the characteristics of controllable cation structure and exchangeable anion between layers. The properties of the films were investigated by X-ray diffractometer (XRD), scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). XRD and SEM results indicate that the Al-Li LDH films are successfully prepared on LA51 alloys. The contact angle (CA) was measured to be about 100.7°, indicating that the surface wettability of the film converted from hydrophilic to hydrophobic by surface modification. The corrosion resistance of Al-Li LDH films was evaluated by Tafel polarization curve and electrochemical impedance spectroscopy (EIS). Surprisingly, Tafel polarization curve and EIS test reveal that the Al-Li LDH films prepared at the molar ratio of Li + /Al 3+ 1:2, pH 11.5 and temperature 125 °C have better corrosion resistance in 0.1 M NaCl neutral solution. In addition, the formation mechanism and corrosion mechanism of the films on the surface of LA51 alloy are also proposed. It provides innovative synthetic materials and novel design ideas for the preparation of high-efficiency anti-corrosion coatings on LA51 alloys, whose application can be extended in industrial fields.
研究领域:
材料科学
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腐蚀与防护
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 20
·1-13
·
IF 2.8
Liu Chen,Ji Yulong,Feng Xia,Liu Jingsong,Shen Yichun,Xia Xuerong,Wang Lixi,Zhang Qitu
Lanthanide ion-doped Sc 2 Mo 3 O 12 upconversion (UC) luminescent materials exhibit a unique negative thermal quenching phenomenon, making them highly promising for applications in fluorescence thermometry. However, the luminescence intensity of Sc 2 Mo 3 O 12 phosphor is relatively low at room temperature, so it is urgently necessary to enhance the intensity of the phosphor at room temperature. In this study, Sc 2 Mo 3 O 12 :Yb/Er/Al phosphors were synthesized via the solid-state reaction method, and the effects of Al 3+ ion doping on their phase composition and upconversion fluorescence properties were investigated by X-ray diffraction (XRD) analysis and upconversion fluorescence spectra evaluation. The results show that the incorporation of Al 3+ ions enhanced the UC intensity at room temperature and improved the fluorescence thermometry performance. The doping of Al 3+ ions disrupts the lattice symmetry and reduces the distance between sensitizer ions (Yb 3+ ) and activator ions (Er 3+ ), increasing the UC intensity by approximately 4.2 times. In addition, the dependence of fluorescence properties of ScAl 0.6 Mo 3 O 12 :18%Yb 3+ /2%Er 3+ samples on temperature were tested, the negative thermal quenching effect was verified, and the thermal enhancement mechanism was explored. The maximum absolute and relative sensitivities of the ScAl 0.6 Mo 3 O 12 :18%Yb 3+ /2%Er 3+ reached 0.00635 K −1 at 372 K and 0.00829%K −1 at 300 K, respectively, indicating the potential of the phosphor for applications in optical thermometry.
研究领域:
材料科学
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光学测温
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固态物理
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发光材料
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掺杂技术
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
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IF 4.831
Qi Liu,Yatong Liu,Zhiyong Xing,Yuntong Huang,Li Ling,Xinglin Mo
In this study, a novel dual-function probe BMP based on benzothiazole was easily synthesized and characterized through common optical technique. In the system consisting of DMF/H 2 O (v/v, 2/3), probe BMP showed azure and blue-green to Al 3+ and Ga 3+ , respectively. Besides, the binding ratios of BMP to Al 3+ and Ga 3+ were determined as 1:1, which confirmed by Job’s plot. Furthermore, for Al 3+ and Ga 3+ , the limit of detection (LOD) was determined to be 1.51 × 10 -6 M and 4.28 × 10 -6 M, respectively. Moreover, it was worth noting that BMP showed good performances in paper colorimetry, cell phone colorimetric identification and cell imaging.
研究领域:
分析化学
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材料科学
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生物化学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Weijia Guo,Peiyao Zhao,Zhenxing Yue
Passive electronic components made from dielectric ceramics can hardly operate at extremely high temperatures, which is attributed to the sharply increasing dielectric loss and leakage conductance. In this work, the widely applicated CaTiO 3 ceramics are used as the matrix, and the high-temperature electrical properties are modified by doping Sm 3+ and Al 3+ . The Sm-doping in CaTiO 3 ceramics can significantly suppress the dielectric relaxation at low frequencies and reduce the high-temperature leakage conductance. Continued doping of Al in Ca 0.6 Sm 0.27 TiO 3 ceramics can further reduce the high-temperature dielectric loss and conductivity. These changes are associated with tighter crystal structures and fewer defects in the ceramics. With Sm and Al doping, the high-temperature dc conductivity of the ceramics is reduced by about 4 orders of magnitude, and a dielectric loss of less than 0.02 and a low temperature cofficient of capacitance (TCC) of − 25 ppm/℃ are obtained over a wide temperature range of room temperature to 530 ℃. Outstanding temperature stabilities are exhibited over a temperature range of 25 ∼ 200 ℃ in energy storage performance and charge-discharge property. Extremely fast discharge speed ( t 0.9 = 16 ns) makes it suitable for pulsed power electronic systems. Such linear dielectric materials are expected to be used in harsh environment of high temperatures.
研究领域:
材料科学
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电气工程
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陶瓷
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DOI
高影响因子
MICROCHIMICA ACTA
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2020
·Vol. 187
·期 8
·1-11
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IF 6.232
Qu Fei,Wang Bingjie,Li Kexin,You Jinmao,Han Wenli
The aggregates of glutathione-capped CuNCs induced by Al 3+ (named CuNCs@Al 3+ complexes) show a stable aggregation-induced emission (AIE) for about 1 month. Their fluorescence maintains a high level in the pH range 4.0 to 7.0, while it quenches as pH increases from 7.0 to 7.7 or decreases from 4.0 to 3.0. Under urease-catalyzed hydrolysis, urea produces ammonia, which can be further hydrolyzed to yield OH − . This leads to a pH increase of the immediate environment. Hence, the CuNCs@Al 3+ complexes are a suitable probe to determine urea. The fluorescence of CuNCs@Al 3+ complexes quenches linearly at 585 nm with the excitation wavelength at 340 nm when the concentration of urea increases from 20 to 150 μM. The limit of detection (LOD) of urea is 5.86 μM. This sensitivity is superior to other reported works due to the narrow pH response range of CuNCs@Al 3+ complexes. This method has been successfully applied for measuring urea in human urine samples with satisfactory recoveries.
Schematic representation of urea determination based on pH-responsive property of copper nanoclusters@Al 3+ complexes. Ammonia is produced in the hydrolysis of urea by urease, and it is further hydrolyzed to yield OH − , leading to increasing pH of the environment.
研究领域:
分析化学
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纳米技术
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生物技术
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生物化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2024
·Vol. 35
·期 6
·1-11
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IF 2.8
Zhang Zhengyu,Yang Yujie,Chen Congliang,Chen Dongyang,Zhang Yingming,Meng Yuting,Li Hao
In this study, Ni–Zn–Co ferrite doped with (Al 3+ ) was synthesized by solid-phase synthesis method and its structure was analyzed. By analyzing the X-ray diffraction (XRD) data, it was explained that the Ni 0.45 Zn 0.40 Co 0.15 Fe 2-x Al x O 4 (0 ≤ x ≤ 0.15) ferrite has a single-spinel structure with FD-3 m space group. Additionally, by analyzing the XRD data, it is found that the lattice constant is the largest when Al 3+ is undoped. The range of lattice constant is (8.3751 ~ 8.3900) Å, the range of saturation magnetization ( M s ) is (68.77 ~ 79.39) emu/g, and the range of coercivity ( H c ) is (9.04 ~ 13.10) Oe. When the content of Al 3+ is 0.09, the permeability reaches the highest. In conclusion, the results obtained indicate that this ferrite is suitable for low-frequency electronic devices and also confirm that Fe 3+ was successfully replaced with Al 3+ . This paper provides a new idea for the study of spinel-structured ferrites by doping Al 3+ .
研究领域:
材料科学
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固体物理
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磁学
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DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2019
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IF 3.834
Nan Zhou,Peixing Gao,Yimei Yang,Yuan Zhong,Mao Xia,Ye Zhang,Yun Tian,Xiangyang Lu,Zhi Zhou
In this paper, a series of novel orange-red emission phosphors Sr 8 ZnY(PO 4 ) 7 :Sm 3+ (SZYP:Sm 3+ ) were synthesized by high-temperature solid-state reaction. The photoluminescence and concentration-dependent properties of this phosphor were investigated carefully through diffuse reflection spectra, excitation and emission spectra, Commission Internationale de l'Éclairage (CIE) chromaticity coordinate and decay times. SZYP:Sm 3+ could be efficiently excited by n-UV and blue lights which center at 318, 345, 363, 376, 401, 410, 440 and 475 nm, respectively. The characteristic orange-red emission peaking at 563, 601 and 647 nm had been detected, which should be attributed to the characteristic f – f forbidden transition of Sm 3+ . The internal quantum efficiency (IQE) of ideal phosphor of SZYP:0.09Sm 3+ reached as high as 47%. In addition, The concentration quenching mechanism and thermal stability of SZYP:Sm 3+ were further investigated. It was found SZYP:Sm 3+ can maintain 93% of initial emission intensity at 150 °C and the corresponding activation energy was calculated to be 0.26 eV based on Arrhenius formula. The emission intensity of 1.0Mg 2+ and 0.02Al 3+ incorporated SZYP:0.09Sm 3+ reached up to 134% and 117% of the initial value, respectively. Moreover, (light-emitting diodes) LED devices were fabricated by employing the optimized samples as orange-red component with 365 nm n-UV chips. The desired emission in plant absorption region and extremely high thermal stability imply that SZYP:Sm 3+ is suitable for the application in plant growth LED lighting.
研究领域:
材料科学
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光学工程
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固体化学
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光电子学
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农业照明技术
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DOI
高影响因子
Nanoscale
·
2023
·Vol. 15
·期 12
·5696-5704
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IF 6.7
Linxiang Yang,Qingsong Shan,Shuai Zhang,Yihui Zhou,Yan Li,Yousheng Zou,Haibo Zeng
Anion-exchange reactions are recognized as a vital and facile post-synthesis method to precisely manipulate the emission spectra of perovskite quantum dots (QDs). However, the anion-exchange process often induces adverse structural evolution and trap-mediated mechanisms, so mixed-halide perovskite QDs suffer inefficient anion exchange and poor spectra-stability issues, which limits access to high-quality primary color perovskite QDs for display applications. Here we report an Al3+ bonding-doping synergistic strategy for manufacturing stable mixed Br/Cl deep-blue perovskite QDs. By doping Al3+ into perovskite QDs, highly-efficient Cl− anion exchange and a large-range blue shift of the PL spectrum (∼62 nm with only 0.1 mmol of Cl feed) can be easily achieved. Notably, the Al3+-mediated deep-blue emission sample exhibits superior stability against moisture and electric fields. It also shows an elevated valence band maximum level. Based on the anion-exchanged QDs, a spectrum-stable deep-blue QLED with an EQE of 1.38% at 463 nm is achieved. Our findings demonstrate a feasible and promising strategy for developing high-performance deep-blue perovskite materials and optoelectronic devices.
研究领域:
材料科学
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纳米技术
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光电技术
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DOI
PubMed
高影响因子
WATER RESEARCH
·
2024
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IF 11.4
Xiaodan Zheng,Menglin Wang,Shiqi Zhang,Zhima Yangcuo,Lifang He,Lingfang Xie,Yurou Ye,Guifen Xu,Zhonghui Chen,Qihong Cai
Antibiotics are a new type of environmental pollutants. Due to its wide application in many fields, antibiotic residues are ubiquitous in the wastewater environments. Given their potential threat on water ecosystem functioning and public health, the detection of antibiotic residues in wastewater environments has become very necessary. Based on the complexation of Al 3+ with flumequine (FLU), ciprofloxacin (CIP) and doxycycline hydrochloride (DOX), their molecular conjugated area were increased and fluorescence intensity were enhanced, combined with synchronous fluorescence spectrometry (SFS) had good selectivity and high sensitivity, a novel method of Al 3+ sensitized synchronous fluorescence spectrometry for the determination of FLU , CIP and DOX residues in wastewater was established. When the wavelength difference (Δλ) was selected 115.0 nm, synchronous fluorescence spectra of the three antibiotics could be well separated and the interference of wastewater matrix were eliminated primely. The new SFS made good use of spectral separation instead of conventional chemical separation, and the actual wastewater sample could be directly determined after simple filtration. The experiment results showed that the concentrations of FLU, CIP and DOX in the range of 0.5000–800.0 ng·mL -1 , 0.5000–640.0 ng·mL -1 and 10.00–3500 ng·mL -1 had a good linear relationship with fluorescence intensity. The detection limits of three antibiotics were 0.02054 ng·mL -1 , 0.03956 ng·mL -1 and 0.8524 ng·mL -1 , respectively. Recovery rates of three antibiotics in wastewater samples were 90.72%-98.23%, 88.68%-95.08% and 85.94%-96.70%. The new SFS established in this experiment had the advantages of simple, rapid, sensitive, accurate and good selectivity. Simultaneous and rapid detection of FLU, CIP and DOX residues in wastewater was successfully realized. It had good application prospects in real-time water quality monitoring.
研究领域:
环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Xiaoling Ling,Qingxin Han,Lulu Ning,Li Wang,Weisheng Liu
Salicylaldehyde acyl-hydrazone derivatives have been widely applied to design fluorescent probe for Al 3+ detection, but they are always restricted to detect Al 3+ in water and actual samples by their poor solubility, low sensitivity, and long response time. Biologically inspired, four salicylaldehyde acyl-hydrazone compounds were designed and synthesized and H 4 L 1 as one of them was selected for in-situ assembly of the ytterbium complex (FP-Al), which has been developed to be a new fluorescent probe for Al 3+ detection by the central mental displacement process. The in-situ structure transformation from FP-Al to Al-L was fully characterized by X-ray crystal structure analysis, 1 H NMR, FT-IR, and spectral analysis. The intrinsic driving force was explained and elaborated by theoretical calculation. FP-Al showed a significant visible fluorescence enhancement and near-infrared luminescence decreased upon the addition of Al 3+ . Compared with the ligand H 4 L 1 , FP-Al showed enhanced sensing performance during Al 3+ detection, especially in improving water solubility and selectivity to Al 3+ , promoting response speed, reducing background fluorescence and increase cell-membrane permeability. The application of spontaneous metal replacement reaction might be able to provide a new strategy to develop high-performance optical chemo-sensors.
研究领域:
分析化学
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材料科学
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生物化学
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产品关联
DOI
高影响因子
Computational and Structural Biotechnology Journal
·
2025
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IF 4.1
Tianzhu Guan,Chenxi Ren,Yining Feng,Canfeng Bian,Huaxiang Li,Qingling Wang
As one of the endocrine-disrupting compounds (EDCs), diethylstilbestrol (DES) poses significant risks to ecosystems and human health. This study reports the development of a magnetic nanocomposite (Fe₃O₄@Al³⁺@laccase) via glutaraldehyde (GA) crosslinking to enhance DES degradation. The single factor experiments revealed that the optimum immobilization conditions were: temperature 40℃, pH 5, enzyme concentration 1.0 mg/mL, and immobilization time 1.0 h. Under these conditions, Fe₃O₄@Al³⁺@laccase achieved 91.71%±2.95% DES degradation within 12 h, as validated by HPLC, retaining 31.29%±1.99% of its initial catalytic activity after 10 reuse cycles. Notably, the immobilized laccase exhibited superior stability in organic solvents compared to free laccase. Fourier-transform infrared (FTIR) analysis confirmed that laccase was successfully conjugated onto Fe₃O₄@Al³⁺. Scanning electron microscopy and transmission electron microscopy revealed that the immobilization process preserved the original morphology and crystalline structure of Fe₃O₄@Al³⁺. Multi-spectroscopic analyses, including enzyme kinetics, fluorescence, and three-dimensional (3D) spectroscopy, elucidated the binding affinity and conformational changes between laccase and DES. Molecular docking simulations predicted a binding free energy of −6.4 kJ·mol⁻¹, indicating that the conformation stability between laccase and surrounding free amino acids was mainly maintained via van der Waals, pi-pi T-shaped, Pi-Donor Hydrogen Bond, and Pi-Alkyl. This work provides proof-of-concept for using Fe₃O₄@Al³⁺ as a reusable magnetic support for laccase, offering a promising strategy for DES degradation and guiding the design of advanced nanomaterials for environmental bioremediation.
研究领域:
环境科学
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生物催化
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纳米技术
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生物化学
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计算生物学
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产品关联
DOI
PubMed
高影响因子
CRYSTAL GROWTH & DESIGN
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2025
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IF 3.4
Min Xue,Junjie Fu,Furui Shang,Gang Wang,Lei Zhang,Hongjuan Lv
Two acylhydrazone derivatives with long-chain alkyl groups, DHS (salicylaldehyde-based) and DHN (naphthaldehyde-based), were designed and synthesized. Both compounds exhibited supramolecular gelation abilities, and DHN was a supergelator for benzene. The single-crystal X-ray diffraction analysis revealed that DHS forms dimers via intermolecular hydrogen bonding. The powder X-ray diffraction (PXRD) studies showed that DHS adopts different repeating units in benzene and propanol gels. Based on the results obtained from single-crystal structure, PXRD, and mass spectrometry measurements, a plausible self-assembly evolution of gelator molecules was proposed. This work demonstrated that the single-crystal structures could provide critical insights into the molecular packing of the gel state. The fluorescence spectra and in situ monitoring of the gelation process confirmed that both DHS and DHN possess typical aggregation-induced emission (AIE). Notably, DHS functions as a highly sensitive optical chemosensor for Al3+, achieving quantitative detection with a remarkable minimum detection limit of 4.79 nM.
研究领域:
材料科学
·
超分子化学
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分析化学
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有机化学
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晶体学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）