CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xiangpeng Geng,Wen Zhang,Dekai Guan,Yaxin Liu,Bin Ma
In this research, SrWO 4 substrates co-doped with Eu 3+ and Er 3+ were employed to fabricate phosphors with a homogeneous distribution of Eu and Er. The optimal doping concentrations of Eu 3+ and Er 3+ (3% and 4%, respectively) were determined experimentally, and the luminescence mechanism of the phosphor was thoroughly investigated. The concentration quenching mechanism was also analyzed, and thermal stability tests were performed. The experimental results indicate that, due to the thermal quenching effect, the luminescence intensities of both Eu 3+ and Er 3+ ions gradually decrease with increasing temperature. Based on the experimental findings and numerical calculations, the quenching activation energy was determined. The absolute sensitivity ( S a , 0.417% K −1 and 1.132% K −1 ) and relative sensitivity ( S r , 4.236% K −1 and 1.401% K −1 ) of the phosphors were obtained through simulations, and these values are greater than those reported in previous studies. The phosphors were then mixed with ink, and the obtained mixture was printed to produce a pattern, the colors of which became visible under different excitation light sources. The configuration displays a variety of colors at different temperatures, demonstrates effective applicability for anti-counterfeiting purposes, and exhibits multi-mode anti-counterfeiting functionality. These features indicate that the proposed phosphors meet the requirements of advanced anti-counterfeiting technologies.
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高影响因子
Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 36
·30311-30323
·
IF 9.5
Yan Zhu,Guicheng Jiang,Shengpeng Han,Ran Lei,Piqi Song,Yingchun Liu,Shan-Tao Zhang,Danqing Liu,Bin Yang,Wenwu Cao
Lead-based relaxor ferroelectric materials are extensively utilized in various fields such as ultrasonic transducers, sensors, high-precision displacement control, and underwater acoustic detection, owing to their exceptional electrical properties. Nevertheless, the application of lead-based relaxor ferroelectric ceramics in high-end ultrasonic transducers is constrained by their suboptimal electromechanical coupling properties and inadequate overall piezoelectric performance. Here, by employing the strategy of “collaborative design of local structural heterogeneity and texturing”, excellent comprehensive electromechanical properties (d33 = 1310 pC N−1, k33 = 0.87, and TC = 170 °C) were achieved by introducing rare earth Eu3+ ions into [001]PC-textured Pb(Mg1/3Nb2/3)O3–PbZrO3–PbTiO3 (PMN-PZ-PT) ceramics. Their d33 is about 5.5 times that of ordinary ceramic materials without rare earth ion doping. Furthermore, the examination of PFM and relaxor properties reveals that improving relaxor properties in ceramics increases the formation of nano-scale domains, which is directly responsible for their exceptional piezoelectric and electromechanical properties. Nano-scale domain structures are formed as a result of local structural heterogeneity caused by rare earth ion doping and the stress induced elastic field in the texture process. This research will be essential for the continued development and application of high-performance ferroelectric ceramic materials in devices.
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高影响因子
Applied Nanoscience
·
2019
·Vol. 9
·期 8
·1833-1844
·
IF 3.198
Li Xiao,Wang Jing,Liu Jin,Tang Jianguo,Wang Jing,Guo Junlan,Wang Yao,Huang Linjun,Aleem Abdur Raheem,Kipper Matthew J.,Belfiore L. A.
In this work, we contributed new lanthanide (Eu 3+ and Tb 3+ ) complexes that were embedded in both positively and negatively charged polyelectrolyte complex nanoparticles (PCN). Luminescent Eu 3+ complexes [Eu(TTA) 3 Phen] are formed from Eu 3+ using 2-thenoyltrifluoroacetone (TTA) and 1,10-phenanothroline hydrate (Phen) as ligands. Luminescent Tb 3+ complexes [Tb(AcAc) 3 Phen] are formed from Tb 3+ using acetyl acetone (AcAc) and Phen as ligands. Then, polyelectrolyte complex nanoparticles(PCN) are applied to embed lanthanide (Eu 3+ and Tb 3+ ) complexes with two forms of positive charged and negative charged PCNs. PCN/Eu(TTA) 3 Phen and PCN/Tb(AcAc) 3 Phen show that the particle sizes are 40–60 nm and 30–80 nm, respectively. Notably, both hybrid PCN nanoparticles with Eu 3+ and Tb 3+ inclusions behave excellent characteristic luminescence properties. The red emission hybrid nanoparticles of PCN/Eu(TTA) 3 Phen indicate high luminescence intensities at low concentration of 10 −5 M whereas The green emission hybrid nanoparticles of PCN/Eu(TTA) 3 Phen show high luminescence intensity at high concentration of 10 −3 M. Furthermore, concentration-dependent luminescence quenching by heavy metal ions (Ni 2+ , Co 2+ , Cu 2+ , Fe 3+ , and Zn 2+ ) at concentrations as low as 10 −5 M is also reported. This quenching effect of heavy metal ions on the fluorescence property of PCN/Eu(TTA) 3 Phen and PCN/Tb(AcAc) 3 Phen nanoparticles will be valuable for sensing application on bio- and environmental fields. The charged polyelectrolyte polymeric shells of both PCN/Eu(TTA) 3 Phen and PCN/Tb(AcAc) 3 Phen nanoparticles make the lanthanide(Eu 3+ and Tb 3+ ) complexes be compatible in biological and aqueous environmental systems.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Shan Lu,Xuelin Dong,Binbin Zhang,Qi Zhou,Xinwei Zhang,Yonggui Liao,Yajiang Yang,Hong Wang
In this work, a dual-channel probe based on a complex of Eriochrome Black T (EBT) and Eu 3+ ions (denoted as EBT/Eu 3+ ) was used to sense four kinds of tetracyclines (TCs). UV–Vis and fluorescence spectra indicated that EBT/Eu 3+ molecule has the ability to emit dual channel signals of color and fluorescence. When TCs with different structures were added to the EBT/Eu 3+ solution, the color and the fluorescence intensities of EBT/Eu 3+ solution varied with TCs structure. FT-IR spectra revealed that a coordinating reaction occurred between acylamino groups, hydroxyl groups of A-ring in TCs and Eu 3+ ions. The coordinating ratio was 1: 2. Utilizing dual channel signals as well as the aid of principal component analysis (PCA), EBT/Eu 3+ was capable of discriminating not only single TCs with concentrations in nano-molar level, but also binary mixtures of TCs. The results of controlled experiments on various interfering substances and other antibiotics proved that this method has high selectivity for TCs detection. Furthermore, this two-channel sensor array based on EBT/Eu 3+ can also be used for the discrimination of unknown TCs in commercially available pork and honey with the 100% recognition accuracy. These results indicated that TCs with different structures can be rapidly discriminated by using a single and easily prepared sensor array.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Xiaohua Qi,Wenna Zhang,Na Yang,Di Yang,Igor Bychko,Mengyao Chen,Yao Wang,Dongni Han,Linjun Huang,Haoyang Jiang,Miaorong Zhang,Jiuxing Wang,Shichao Wang,Peter Strizhak,Jianguo Tang
Multi-structuralized carbon nanotubes provide various possibilities to create a new generation of functional materials . In this article, the derivative surfaces of multi-wall carbon nanotubes (DSCNTs) have been developed by starting with initial carbon nanotubes (CNTs) to obtain the derivative structures of oxidized CNTs (oxCNTs) and unzipped CNTs (uCNTs). The Eu 3+ complex is successfully directly anchored onto DSCNTs (Eu@DSCNTs) and produces linear fluorescence nanomaterials by introducing functional groups and sufficient specific surface area on the derivative surfaces. The obtained photophysical data, including UV absorption, fluorescence intensities and lifetimes, of the CNTs, oxCNTs and uCNTs have confirmed the improvement of derivative surfaces by oxCNTs and uCNTs, and the improvement is even greater for uCNTs. Furthermore, fluorescence fibres (Eu@DSCNTs/PAN) were obtained by electrospinning in a solution of Eu@DSCNTs with polyacrylonitrile (PAN). The fluorescence nanofibers have excellent fluorescence properties through the improvement of the derivative surface and exhibit excellent processability .
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高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Yi-Fan Xia,Yan-Xia Li,Qing-Yan Xiao,Zhi-Qiang Cai,Qian-Wen Yang,Yi-Xuan Hu,Zi-Yi Mei,Guang-Ming Bao,Hou-Qun Yuan
Diclazuril (DIC) is a broad-spectrum anti-coccidiosis drug of the triazine class, widely used in poultry farming. The overuse of DIC may lead to its accumulation in animal bodies, which may enter the food chain and threaten human health. In this work, we fabricated a stable Eu 3+ -doped UiO-66 fluorescence sensor ( EuUHIPA-30 ) for the sensitive detection of DIC. Among 20 veterinary drugs, the fluorescence of EuUHIPA-30 selectively responds to DIC, with a low detection limit (0.19 μM) and fast response (10 s). EuUHIPA-30 is recyclable and can detect DIC in chicken and eggs with good recoveries. Moreover, a smartphone-integrated paper-based sensor enables the instrument-free, rapid, visual, and intelligent detection of DIC in chickens and eggs. This work provides a promising candidate for practical fluorescent DIC sensing in animal-derived food to promote food safety.
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PubMed
高影响因子
Materials Today Chemistry
·
2022
·
IF 7.613
An Li,Laihui Luo,Peng Du,Weiping Li,Marcin Runowski,Jun Zhou
The polychromatic emission and wide-range color tuning in the luminescent nanoparticles are currently of crucial importance, due to the development of color and white light-emitting diode (LED) devices, based on such lanthanide-doped nanostructured materials . By utilization of precipitation method, Tb 3+ -doped and Tb 3+ /Eu 3+ -codoped NaYbF 4 nanoparticles ( i . e . NPs) are synthesized. For Tb 3+ -doped NaYbF 4 NPs excited by 377 nm, green emission originating from Tb 3+ is observed, where its optimum state is obtained when Tb 3+ content is 25 mol% and the concentration quenching mechanism is found by electric dipole-dipole interaction. Moreover, due to the existence of energy transfer between Tb 3+ and Eu 3+ , polychromatic emissions are realized in Tb 3+ /Eu 3+ -codoped NaYbF 4 NPs as Eu 3+ content increases. Through analyzing emission decay times and emission spectra , it was confirmed that the energy transfer mechanism in the synthesized NPs is governed mainly by electric dipole-dipole interaction. Furthermore, the resultant NPs also own strong resistance to temperature, which is verified by temperature-dependent emission spectra , and the activation energies of Tb 3+ and Eu 3+ are 0.206 and 0.207 eV, respectively. In addition, by employing designed NPs as yellow-emitting components, the fabricated white-LED emits brightness warm white light with color coordinate of (0.385, 0.380), high color rendering index of 84.3 and low correlated color temperature of 3903 K. This work does not only offer an available route to develop NPs with polychromatic emissions but also devise promising luminescent materials for improving the performance of the phosphor-converted white-LED.
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高影响因子
Crystals
·
2022
·Vol. 12
·期 10
·1382
·
IF 2.67
Xinhua Chen,Qingliang Xu,Fayaz Hussain,Chen Yang,Weiqin Sheng,Xinjiang Luo,Bing Liu,Shikuan Sun,Dawei Wang,Kaixin Song
Red LEDs with a high color purity and high color rendering index are often used to compensate for the lack of red-light components in current white LEDs. Therefore, the new type of garnet-structured high color purity red phosphor Y2−xSrAl4SiO12: xEu3+was synthesized by the solid-state method. The band gap structure of the host matrix was studied through the DFT calculation and found that the matrix belongs to a direct band gap structure with a band gap size of 4.535ev. The phosphor exhibits a wide excitation spectrum under the monitoring of 710 nm. The strongest excitation wavelength is 393 nm, and it exhibits bright red light under the excitation of 393 nm, and the emission peak positions are located at 570 nm, 597 nm, 613 nm, 650 nm, 710 nm and 748 nm, respectively, which are attributed to the5D0→7Fjof Eu3+(j = 0–5) electronic transitions. In the crystal structure of Y2SrAl4SiO12, Eu3+occupies a symmetry site. The compositional changes and thermal studies found favorable at 20% mol. At this concentration, the luminescence intensity gradually weakened due to the Eu3+electric multi-level interaction. It is worth noting that the emission intensity of Y2SrAl4SiO12: 20%Eu3+at 433 K can be maintained to 92% of that at 293 K. Finally, we combined it with the NUV chip and packaged it into a red LED with a color purity of up to 90% and a correlated color temperature of 1492 K. The high purity, low color temperature and thermal stability indicate that it has a place in LED applications.
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高影响因子
JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Qinling Li,Chao Chen,Bingqing Shen,Bingcheng Yu,Yuepin Zhang
A series of Bi 3+ /Eu 3+ co-doped Ba 3 Y(BO 3 ) 3 red-emitting phosphors were successfully prepared by the combustion method. The crystal structure and photoluminescence properties of the as-prepared phosphors were investigated by X-ray powder diffraction, photoluminescence excitation and emission spectra . In this paper, the Bi 3+ ion was employed as a sensitizer to improve the red emission intensity of Eu 3+ . The optimal doping concentration of Bi 3+ was 1 mol%. The observed excitation broad bands centered at 300 nm confirmed Bi 3+ ion doped into the Ba 3 Y(BO 3 ) 3 host. The red emission intensity of Eu 3+ was significantly enhanced by doping a small amount of Bi 3+ . Furthermore, Bi 3+ /Eu 3+ co-doped phosphor possessed admirable thermal stability (the emission intensity of studied phosphor at 423 K maintained 80.7% of the initial intensity at room temperature). The results manifest that Bi 3+ ion is an efficient sensitizer for Eu 3+ ion and Ba 3 Y(BO 3 ) 3 : 24 mol% Eu 3+ , 1 mol% Bi 3+ phosphors possess a great potential for applications in white LEDs.
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高影响因子
ENERGY AND BUILDINGS
·
2015
·
IF 2.884
Zhijian Liu,Wenlu Xu,Anni Lin,Tao He,Fan Lin
NaGd(WO 4 ) 2 :Eu 3+ /Bi 3+ films were deposited on SiO 2 glass substrates by spin-coating. The as-prepared films were heat treated at different temperatures. The properties of films were characterized by TG-DSC, XRD, SEM and fluorescence spectrophotometer. The TG-DSC curve indicated that films began to crystallize at about 600 °C. The XRD patterns and SEM images of films annealed at 600 °C, 700 °C and 800 °C showed that a higher temperature benefits to the higher crystallinity and induces the lower thickness. Meanwhile, it was found that the revolution of spin coating influenced the morphology of films obviously. Under the excitation at 396 nm, NaGd(WO 4 ) 2 :Eu 3+ /Bi 3+ films showed characteristic emission bands originating from 5 D 0 → 7 F j ( j = 1, 2, 3, and 4) transitions of Eu 3+ ions. It was also found that the excitation wavelength has great effect on the emission intensity.
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高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Taifang Zhang,Dan Zhang,Peng Wang,Lingxuan Zhou,Mikhail G. Brik,Chonggeng Ma
Inorganic phosphors with tunable broadband emission hold significant applications in solid-state lighting. Herein, a series of novel Sr 3 YGa 2 O 7.5 : Bi 3+ , Eu 3+ (abbreviated as SYGO: Bi 3+ , Eu 3+ ) phosphors with tunable optical properties were synthesized by high-temperature solid-state reaction process. The photoluminescence excitation (PLE) spectrum of Sr 3 YGa 2 O 7.5 : Bi 3+ ranges from 200 to 400 nm with two peaks at 280 and 331 nm, matching well with the n-UV chip based white light-emitting diodes (WLED). Under ultraviolet light excitation, a single Bi 3+ -doped Sr 3 YGa 2 O 7.5 phosphor exhibited five distinct luminescence peaks at 410, 510, 560, 605, and 700 nm at 10 K, which are attributed to the 3 P 1 → 1 S 0 transition emissions of Bi 3+ ions occupying the four Sr sites and one Y site within the Sr 3 YGa 2 O 7.5 host lattice . The optical tuning of the Sr 3 YGa 2 O 7.5 : Bi 3+ phosphor is achieved by designing the Bi 3+ →Eu 3+ energy transfer and changing the excitation wavelength based on the selected site occupation. The Commission Internationale de l'Eclairage (CIE) coordinates and emission color of the Sr 3 YGa 2 O 7.5 : Bi 3+ , Eu 3+ phosphors were successfully tuned from blue via white to red. The energy transfer efficiency from Bi 3+ to Eu 3+ can reach as high as 89.54 %, and this energy transfer process is predominantly governed by the dipole-quadrupole interaction. In addition, the white LED device prepared by combination of SYGO: 0.02Bi 3+ , 0.03Eu 3+ phosphors with 365 nm chip has high color rendering index (CRI) of 85.5 and low correlated color temperature of 3537 K. As the driving current increases, the white light emitting diodes (WLED) device demonstrates good color stability. Based on these findings, the synthesized SYGO: Bi 3+ , Eu 3+ phosphors can serve as color-tunable and single-phase white phosphors with potential applications in UV-excited white LEDs.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 30
·64137-64145
·
IF 5.6
Guofeng Zhang,Rui Hu,Yichao Wang,Sicheng Gao,Zhaoyi Yin,Zhiguo Song,Jianbei Qiu,Yongjin Li
Realizing efficient far-red luminescence ( 5 D 0 → 7 F 4 transitions) from Eu 3+ ions in conventional hosts remains challenging due to the intrinsically limited energy transfer pathways. Herein, a novel dual-engineering strategy is proposed to synergistically increase the far-red emission of Eu 3+ within BiOCl nanosheets by co-introducing plasmonic metallic Bi and oxygen vacancies (OVs). Metallic Bi nanoparticles and the OVs are simultaneously incorporated into BiOCl:Eu nanosheets via a tailored solvothermal method, followed by in situ reduction. The synergistic interplay between the OVs and localized surface plasmon resonance of Bi drastically enhances the excitation harvesting and efficiency of energy transfer to the Eu 3+ activators. Consequently, the far-red emission intensity at 700 nm is remarkably enhanced 6.7-fold under 313 nm excitation, representing an unprecedented increase compared to that of pristine BiOCl:Eu. Furthermore, the precipitation of metallic Bi significantly enhances the thermal stability of the luminescence. This study provides fundamental insights into the synergistic plasmon-defect interactions within 2D semiconductors and establishes a promising pathway for use in developing high-performance far-red phosphors for application in advanced phosphor-converted white light-emitting diodes.
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高影响因子
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