JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xueying Wang,Yida Lei,Liang Shi,Jie Li,Lichuan Jin,Yulong Liao,Kui Liu,Huaiwu Zhang
The adjustment of crystal structures and properties by ion substitution has received increasing interest in recent years to solve issues related to the preparation of LTCC microwave devices. In this work, Fe 3+ ions were substituted in BaFe 12 O 19 sintered at a low temperature (920 °C). The changes in microstructures, dielectric characteristics, and magnetic properties were all examined. The ferromagnetic resonance linewidth (Δ H ) of BaM ferrite was measured at magnetic fields from 6000 to 24,000 Oe. The results revealed well-grown microstructures of BaM ferrite grains at 920 °C to form typical hexagonal structures. The increase in substitution of Ga 3+ ions decreased the lattice constant and cell volume of the crystals. More interestingly, the dielectric and magnetic properties depicted significant changes in the original dielectric and magnetic parameters of BaM after the substitution of Ga 3+ ions. The permittivity ( ε′ ) rose to a maximum of 16.36 at x = 0.4, while the dielectric loss angle tangent (tan δ ε ) declined to 1.2 × 10^ −3 . As Ga 3+ ions rose, the saturation magnetization 4π Ms decreased from 3168.58 Gauss to 2571.18 Gauss. The remanence ( Mr ) reached a maximum value of 31.07 emu/g at x = 0.4. The ferromagnetic resonance linewidth (Δ H ) of BaM ferrite sample at 31 GHz attained a minimum value of 4216.336 Oe at x = 0.8. In sum, these findings look promising for future fabrication of LTCC microwave RF devices.
研究领域:
材料科学
·
电子工程
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Manli Zhang,Xuesong Zhai,Pengpeng Lei,Shuang Yao,Xia Xu,Lile Dong,Kaimin Du,Chengyu Li,Jing Feng,Hongjie Zhang
Temperature sensors based on upconversion luminescence (UCL) intensity ratio have attracted great attention due to the high sensitivity. The enhancement of UCL is helpful to improve the sensitivity of temperature sensor. Doping is an effective way to achieve the UCL enhancement. Ga 3+ ions doped NaYF 4 :18%Yb,2%Er have been prepared through a facile one-pot solvothermal method . Upconversion (UC) emission intensity was significantly enhanced by introducing Ga 3+ ions into the lattice of NaYF 4 :Yb,Er, especially the green UC emission. With Ga 3+ concentration increasing, the size of the resulting NaYF 4 :Yb,Er,x%Ga particles decreases gradually. By doping 25% Ga 3+ , the green UC emission is increased by 30 times, while the red emission is enhanced by only 8 times. The morphology of particles and local symmetry around Er 3+ ions have been changed, resulting in the selective enhancement of green UC emission. In addition, the temperature-dependent UCL properties of NaYF 4 :Yb,Er,25%Ga and NaYF 4 :Yb,Er were investigated. The maximum thermal sensitivity of NaYF 4 :Yb,Er,25%Ga could reach 0.0046 K −1 at 498 K. Therefore, NaYF 4 :Yb,Er,25%Ga with strong green UCL could be served as a potential candidate for sensitive temperature sensing.
研究领域:
材料科学
·
光学传感器
·
发光材料
·
纳米技术
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 18
·1391
·
IF 3.2
Zheng Zehan,Su Congxue,Wei Xiuzhen,Tao Wenlong,Liu Bochu,Pan Sisi,Fan Jun,Wang Ruijuan,Fang Liang,Lu Huidan
In this study, a strategy involving the incorporation of non-adjacent valence state cations into tetrahedral sites was employed. Microwave dielectric ceramics with the composition Ca 3 M 2 Ga 2.5 V 0.5 O 12 (M=Sn and Zr) were designed and synthesized using a solid-state reaction method. The crystal structure of these ceramics has been verified as cubic garnet with the Ia -3 d space group. Ca 3 Sn 2 Ga 2.5 V 0.5 O 12 and Ca 3 Zr 2 Ga 2.5 V 0.5 O 12 ceramics sintered at optimal temperatures exhibited favorable microwave dielectric properties, with Q × f values of 18, 571 GHz and 13,370 GHz, ε r of 9.65 and 9.34, and τ f values of − 43.1 ppm/°C and − 36.4 ppm/°C, respectively. The difference in ε r is primarily attributed to the ionic polarizability per unit volume and bond ionicity. The higher Q × f value of the Ca 3 Sn 2 Ga 2.5 V 0.5 O 12 ceramic correlates with its larger packing fraction, narrower Raman full width at half maximum, stronger average bond covalency, and higher total lattice energy. In contrast, the smaller | τ f | of Ca 3 Zr 2 Ga 2.5 V 0.5 O 12 is associated with its larger bond valence at the B-site, lower oxygen bond valence, and higher bond energy. Analysis using the Phillips−Van Vechten−Levine (P−V−L) theory and bond valence calculations demonstrates that the M 4+ cations occupying the octahedral sites have a significant impact on the microwave dielectric properties. Furthermore, a dielectric resonator antenna based on Ca 3 Sn 2 Ga 2.5 V 0.5 O 12 was designed for C-band communication (4−8 GHz).
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
IF 3.428
Bo Meng,Shenyong Ren,Zhi Li,Weiyu Song,Qiaoxia Guo,Baojian Shen
Decreasing steam treating temperature of zeolite Y to prepare USY has great attraction for industrial production of FCC catalysts, which is often operated at high temperature thus leading to huge energy consumption. Heteroatoms in the framework of zeolite Y are easier to be removed under steam condition, but the introduction of heteroatoms often leads to the decrease of relative crystallinity of zeolite. When Ga 3+ is introduced into the framework of zeolite Y, high crystallinity is well maintained in this work. Interestingly [Al, Ga]-NaY can be treated at low steam temperature to form [Al, Ga]-USY with very good mesoporosity and high framework SiO 2 /Al 2 O 3 ratio. The sample [Al, Ga]-NaY-8 has a distinctive micropore size distribution at 0.92 nm which is much bigger than conventional microporous NaY. DFT study disclosed the reason of low temperature steam treatment. The catalytic cracking of 1,3,5-TIPB and n -octane showed that the catalyst [Al, Ga]-USY obtained at lower steam treating temperature presented good performance.
研究领域:
化学工程
·
材料科学
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DOI
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 24
·8059
·
IF 4.6
Tao Wang,Bingkai Gao,Jiehong Li,Zhijun Wang,Panlai Li
Cr3+-doped Sr3Ga2Ge4O14:0.03Cr3+(SGGO:0.03Cr3+) phosphor was synthesized via a high-temperature solid-phase method. Considering the tunable structure of SGGO, Ga3+ions in the matrix were substituted with In3+ions at a certain concentration. The tuned phosphor produced a red-shifted emission spectrum, with its luminescence intensity at 423 K maintained at 63% of that at room temperature; moreover, the internal quantum efficiency increased to 65.60%, and the external quantum efficiency correspondingly increased to 21.94%. On this basis, SGIGO:0.03Cr3+was encapsulated into apc-LED, which was applied in non-destructive testing (NDT) experiments, successfully realizing the recognition of water and anhydrous ethanol, proving its potential application in the field of NDT.
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JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Le Liang,Su-qian Cai,Yan-li Leng,Chan Huang,Yong-qing Liu,Ye Wang,Li Luo,Mei Han,Xiao-hong Li,Xiao-hua Cai
Ciprofloxacin (CIP) and gallium (Ga) are widely used in many fields and their excessive presences will pose serious threats to the environment and life health. Therefore, developing an intelligent detection method for rapidly tracking and determination of CIP and Ga 3 ⁺ concentration in environments and organisms is of great significance. In this work, a europium-doped carbon dots (Eu-CDs) with unique structure and performances was prepared by a one-pot hydrothermal method. Eu-CDs can efficiently overcome the problem of aggregation-induced fluorescence quenching in complex environments to track CIP and Ga 3⁺ with highly sensitivity. The "antenna effect" of non-radiative energy transfer is introduced to explain the pathway on fluorescence transition of Eu-CDs through DFT theoretical calculations and mechanism investigations, which provide a theoretical basis for the design and development of novel carbon dots with specific functions. Eu-CDs can successfully be applied to fluorescence imaging in organisms, moreover, it also exhibits excellent application potentials in the field of anti-tumor and antibacterial. In addition, a portable intelligent detection platform based on Eu-CDs-hydrogel device have been developed, which provides a new strategy for rapidly detection of CIP and Ga 3⁺ in real samples.
研究领域:
分析化学
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环境科学
·
生物医学工程
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DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Yan Liu,Jiajia Han,Guosheng Chen,Siming Huang,Shuyao Huang,Juan Zheng,Jianqiao Xu,Fang Zhu,Gangfeng Ouyang
Phytohormones are a class of endogenous substances that separately or synergistically regulate the growth, development, and differentiation of plants. Accurately and efficiently detecting and monitoring the concentration of plant hormones in living plants is of significant importance. Herein, a novel mesoporous carbon hollow spheres (MCHS)-based in vivo solid phase microextraction (SPME) probe was designed for in vivo sampling of plant hormones. The designed MCHS features the advantages of high surface area, porous shells, and large hollow spaces, facilitating the dynamic adsorption and enrichment of target phytohormone. In addition, a cationic polyelectrolyte, (poly (diallyl dimethyl ammonium chloride) (PDDA), was further modified onto the MCHS to expedite the extraction process by electrostatic interaction. Utilizing the MCHS@PDDA probe in combination with HPLC-MS/MS facilitated the continuous monitoring of three plant hormones (abscisic acid (ABA), indole-3-acetic acid (IAA), and gibberellin (GA3)) in Chinese aloe. The detection limit of this method was 0.016–0.090 μg/L, the linear range was 10–1000 μg/L, and both the RSD of the single probe (n = 6) and probe-to-probe test (n = 6) were less than 7.2 %. This method had excellent accuracy and good reproducibility comparable to the traditional sample pretreatment method. Ultimately, this established in-vivo SPME method was successfully adopted to quantify three selected plant hormones in living Chinese Aloes, providing a new method for the long-term monitoring of endogenous active substances in living system.
研究领域:
分析化学
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植物科学
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生物技术
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Qiuyang Zhang,Ruirui Ma,Kunpeng Jia,Shunhang Dong,Jie Chen,Changjiang Pan
Titanium and its alloys, as the most prevalent materials for orthopedic implants, face two critical challenges in clinical practice: inadequate osseointegration and susceptibility to bacterial infection. To resolve these issues, a multifunctional coating (TNT+XGPP) was developed on Ti implants via three steps: electrochemical anodization to construct TiO 2 nanotube (TNT), hydrothermal loading of bone-affinity Ga 3+ ions (TNT+XG) at different concentrations, and carbodiimide-mediated grafting of γ-polyglutamic acid (γ-PGA) via a polydopamine intermediate layer. The morphology, composition, surface wettability, and ion release behavior of the prepared coatings were thoroughly characterized. The coatings were assessed for early-stage osteoblast growth behavior, Ca-P apatite formation capacity, and antibacterial activity. The characterization results confirmed that Ga 3+ ions and γ-PGA were successfully incorporated into TiO 2 nanotubes, significantly enhancing hydrophilicity. The TNT+XGPP coating, in conjunction with the nanotubes, Ga 3+ ions at appropriate concentrations (5, 20, and 50 mM), and γ-PGA, not only facilitated osteoblast adhesion and proliferation, but also upregulated the expression of osteogenic functional factors (e.g., alkaline phosphatase, osteocalcin, and runt-related transcription factor-2). In contrast, an elevated concentration of Ga 3+ ions (100 mM) in the coating exerted a certain inhibitory effect against osteoblast growth. The TNT+XGPP coating accelerated the in-situ deposition of bone-like Ca-P apatite, attributing to the synergy of γ-PGA and Ga 3+ ions. The released Ga 3+ ions exerted remarkable antibacterial effects against E. coli and S. aureus , with their concentration positively associated with antibacterial activity. This work offers a novel strategy for enhancing the bone affinity and antibacterial properties of Ti-based orthopedic implants.
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Journal of Materials Chemistry C
·
2021
·Vol. 10
·期 3
·994-1002
·
IF 7.393
Shihai Miao,Yanjie Liang,Yan Zhang,Dongxun Chen,Shao Yan,Jingwei Liu,Xiao-Jun Wang
Near-infrared (NIR) phosphor-converted light-emitting diodes (LEDs) are becoming an efficient and promising solution for high-power NIR light sources, which have shown a broad range of possible applications in the fields of agriculture, food analysis and biomedical diagnostics. However, there is a long-standing challenge to develop tunable and thermally stable NIR-emitting phosphors as luminescence converters in the design of low-cost, compact and high-efficiency NIR LEDs. Here, we report a tunable broadband NIR photoluminescence in Na3Sc2(PO4)3:Cr3+ phosphors via Ga3+ co-doping and explore their application in NIR LEDs. With the fine-tuning of the doping concentration of Ga3+ ions from 0 to 6%, the NIR luminescence of the obtained phosphor can be tuned from sharp line emission at 694 nm (2E → 4A2 transition of Cr3+) to broadband emission centered at 750 nm (4T2 → 4A2 transition of Cr3+) upon blue light excitation. In the meanwhile, the NIR emission intensity at 100 °C and 150 °C can retain ∼100% and ∼84% of the initial value at room temperature when the Ga3+ content is determined to be 6%, leading to thermally stable broadband NIR emission in the as-synthesized Na3Sc2(PO4)3:Cr3+,Ga3+ phosphors. The NIR LEDs constructed by combining the commercial blue LED chips with the optimized NIR phosphors can generate broadband emission in the wavelength range of 600–1000 nm and deliver ∼4 mW of NIR output power with a power conversion efficiency of 2.6% at a drive current of 60 mA. The potential of the fabricated NIR LEDs as a lighting source for night vision and vein imaging is also demonstrated. The outcomes here highlight promising potential for Na3Sc2(PO4)3:Cr3+,Ga3+ as phosphor-downconverted light emitters in the design of high-power NIR LED devices for practical applications.
研究领域:
材料科学
·
光学材料
·
固态照明
·
光子学
·
半导体器件
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DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2025
·
IF 5.1
Jinhan Zhang,Caixia Yuan,Bingqian Wang,Yuan Sun,Yongsheng Xiang,Lihua Wu,Yanjun Cui,Zhenbin Chen
The recovery of valuable elements from spent copper–indium–gallium–diselenide solar cells has been a topic of considerable interest. In this study, based on the elemental ratios in the leachate of spent solar cells, a multi-template thermos-responsive imprinted polymer (GIS-TIIP) was prepared by combining thermo-responsive technology and imprinted technology. This polymer was used for the simultaneous and proportional selective separation and purification of gallium, indium, and selenium from the leachate. The structure and performance of GIS-TIIP were systematically characterized through Fourier Transform Infrared Spectroscopy, Scanning Electron Microscopy-Energy Dispersive Spectrometry, Transmission Electron Microscopy, Brunauer-Emmett-Teller surface area and pore size analysis, Thermogravimetric Analysis, X-ray Photoelectron Spectroscopy, and Inductively Coupled Plasma-Atomic Emission Spectroscopy. The structure of GIS-TIIP responded to temperature changes. At 35 °C, maximum adsorption capacities were 0.0162 mmol/g for Ga 3+ , 0.0671 mmol/g for In 3+ , and 0.1001 mmol/g for SeO 3 2− . At 25 °C, maximum desorption ratios were 72.65 % for Ga 3+ , 75.33 % for In 3+ , and 69.34 % for SeO 3 2− . The ratio of maximum adsorption capacities for the three target ions (1: 4.142: 6.179) was close to the ratio of the molar amounts of template substances added during the synthesis (1:4:8). The adsorption process of GIS-TIIP fitted better with the pseudo-first-order kinetic model and the Langmuir model. When GIS-TIIP was applied to the diluted leaching solution, the purity of the target elements increased from 55.99 % to 80.98 % after a single adsorption/desorption cycle. The ratio of gallium, indium, and selenium was found to be 1: 4.263: 5.509, indicating the potential for alloy recovery and recycling. After 10 cycles of repeated use, GIS-TIIP still retained 75.71 % of its original adsorption capacity.
研究领域:
材料科学
·
环境工程
·
化学工程
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Hangqing Xie,Zi Chen,Xiaoqin Wei,Qing Han,Haotuo Wang,Xiaolei Yang,Shiqing Xu,Xiang Wang
The fluoride ion (F – ) concentration in serum is an important indicator of fluorosis. However, the biofluorescence of serum itself makes the concentration of F – difficult to detect. Herein, a Tb‐1@F127 nanoprobe is synthesized by Flash NanoPrecipitation of Tb 3+ , Ga 3+ , organic ligands and block copolymer Pluronic (F127). The absorbance and photoluminescence (PL) of the Tb‐1@F127 nanoprobe are enhanced by the "antenna" effect of the organic ligands and the energy transfer of triplet excitons . The molar extinction coefficient of Tb‐1@F127 nanoprobe is 28,000 times higher than the f-f transfer in free Tb 3+ . Moreover, the addition of F – blocks the above energy transfer process , resulting in a decrease in the PL intensity of Tb‐1@F127 nanoprobe. In the serum solution, the PL intensity of Tb‐1@F127 nanoprobe has a linear response to the concentration of F – in the range of 0–18.81 ppm, and the detection limit is 0.056 ppm. The Tb‐1@F127 nanoprobe demonstrates high sensitivity and selectivity for the detection of F concentration, and is not affected by biological autofluorescence.
研究领域:
分析化学
·
生物医学工程
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DOI
高影响因子
ANALYST
·
2021
·Vol. 146
·期 23
·7294-7305
·
IF 4.616
Lijuan Yang,Mingxin Li,Yunyun Wang,Yan Zhang,Zhipeng Liu,Shutang Ruan,Zhonglong Wang,Shifa Wang
A novel fluorescent probe 2-(4-(diethylamino)-2-hydroxybenzylidene)-N-(2,3,3-trimethylbicyclo[2.2.1]heptan-2-yl)hydrazinecarbothioamide (HT) was prepared in this study by a condensation reaction. HT has been confirmed to possess high specificity toward Ga3+ over other metal ions (including Al3+ and In3+) via a distinct fluorescence light-up response. Moreover, HT exhibited good detection performances for Ga3+ including high selectivity, excellent anti-interference ability, a wide working pH range, and good reversibility. The association constant and limit of detection (LOD) were calculated to be 5.34 × 103 M−1 and 1.18 × 10−6 M, respectively. The detection mechanism of HT toward Ga3+ was proposed and confirmed by 1H NMR analysis, HRMS analysis, and DFT calculations. A simple test strip-based portable detecting device and a molecular INHIBIT logic circuit were established for improving its practical applicability. Furthermore, the desirable sensing performance of HT for Ga3+ was successfully reconfirmed in MCF-7 cells and zebrafish.
研究领域:
分析化学
·
生物医学
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产品关联
DOI
PubMed
高影响因子
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