CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Hang Liu,Junlong Liu,Yanchang Liu,Zhihao Qu,Siye Tian,Yuhong Zhang
In this work, the ZnO microsphere is prepared by hydrothermal method and modified with different concentrations of Eu. The morphology of ZnO:Eu sample shows flower-like microspheres with many nanosheets. The gas performance of ZnO:Eu microsphere is investigated for detecting NO 2 . Compared with pure ZnO, the response of ZnO:2 % Eu sensor is increased by 8 times, and the optimal operating temperature of that is decreased to 130 °C. Especially, the gas sensing properties of ZnO:2 % Eu sensor is enhanced under UV excitation. The recovery time of ZnO:Eu sensor is reduced by 1200 s, and the response is increased by 3.6 times under UV excitation. The above results show an increase in sensor response due to doping Eu and UV excitation. At last, the possible gas mechanism of ZnO:Eu is discussed with and without UV excitation. This finding provides important guidance for UV-assisted sensors to enhance NO 2 response.
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DYES AND PIGMENTS
·
2025
·
IF 4.2
Yuqing Yang,Shicong Pei,Mingdi Yang,Kehua Zhang,Jie Jin,Yunsheng Ding,Xianhai Hu
Full-color fluorescent tunable materials have attracted much attention due to their broad application prospects in fields such as lighting, display devices, and biological imaging. However, it remains challenging to prepare environmentally friendly full-color fluorescent tunable materials through simple and efficient methods. Herein, a series of amino-functionalized complexes were synthesized, and, via covalent bonding, a color-tunable waterborne polyurethane system (WPU-Eu 1-x-y Tb x Zn y ) was developed, exhibiting both full-color and white fluorescence. In addition, due to the inherent differences in the ultraviolet absorption properties of each complex, the emission color can be further adjusted by changing the excitation wavelength. This dual mechanism enables both preset and dynamic color adjustments, providing various possibilities for applications such as anti-counterfeiting and display technologies. More importantly, WPU-Eu 1-x-y Tb x Zn y uses water as a dispersant, has a low VOC content, and is particularly safe and environmentally friendly.
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JOURNAL OF ELECTRONIC MATERIALS
·
2016
·Vol. 45
·期 6
·2974-2980
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IF 1.491
Zheng Yuhui,Hu Jing,Deng Surong,Gao Jinwei,Wang Qianming
High-purity LuVO 4 : Ln 3+ /Bi 3+ (Ln = Eu, Sm, Dy) phosphors with tetragonal zircon structures were successfully synthesized. The reactions have been carried out by multiple irradiations with very high efficiency. Transmission electron microscope images showed that the phosphors had rod-like structures with average lengths of about 200 nm. The host absorption edge of LuVO 4 : Ln 3+ /Bi 3+ (Ln = Eu, Sm) shifted to the longer wavelength side. Furthermore, the red emission of Eu 3+ ion and the orange emission of Sm 3+ ion are remarkably enhanced by encapsulating Bi 3+ in LuVO 4 system, whereas in the case of LuVO 4 : Dy 3+ /Bi 3+ , the host absorption and the yellow emission from dysprosium have been suppressed in the presence of Bi 3+ . These novel findings will facilitate their use in the display field.
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JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2023
·
IF 2.7
Huicai Xie,Zhaojun Mo,Quanyi Liu,Hao Sun,Shengcan Ma,Xinqiang Gao,Jun Shen
EuTiO 3 exhibits various interesting physical properties, including magnetocaloric effect, quantum paraelectricity, magnetoelectricity, and multiferroic properties, thus attracting a broad range of attention from the researchers. The delicate balance between ferromagnetic coupling and antiferromagnetic interactions offers the feasibility of modulating the magnetic properties and magnetocaloric effect for this perovskite. Herein, a range of Eu(Ti,B)O 3 perovskites were prepared by substituting titanium with different amounts of boron. A comprehensive investigation on their structure, magnetism, magnetocaloric effect, and critical behavior was performed. All the compounds are confirmed to be crystallized in a single cubic perovskite structure with space symmetry of Pm 3 m , with the introduced boron uniformly distributed in the compounds. The transition temperatures are determined to be 6.0, 6.5, 5.0, and 5.0 K for EuTi 0.9375 B 0.0625 O 3 , EuTi 0.875 B 0.125 O 3 , EuTi 0.8125 B 0.1875 O 3 , and EuTi 0.75 B 0.25 O 3 , respectively. The results of both magnetic measurements and critical behavior analysis suggest that appropriate substitution of boron promotes the magnetic transition from AFM to FM in Eu(Ti,B)O 3 . In addition, significantly enhanced low-field magnetocaloric effects were observed in these perovskites. Under field changes of 0–1 and 0–2 T, the values of - Δ S M max are 14.7 and 26.4 J·kg −1 ·K −1 for EuTi 0.8125 B 0.1875 O 3 , 15.2 and 27.4 J·kg −1 ·K −1 for EuTi 0.75 B 0.25 O 3 , respectively.
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JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Wanyin Ge,Maohao Yang,Honglei Yin,Shifan Shang,Zili Luo,Xin Xie,Ye Tian
SiAlON-based phosphors have garnered considerable attention in the field of white lighting owing to their excellent thermal stability, and rare earth doped SiAlON-based phosphors are expected to be used in a new generation of lighting sources. In this work, Eu 2+ or Ce 3+ doped Si 3 Al 3 O 3 N 5 phosphors were synthesized by high temperature solid phase method. The microstructure of the phosphors exhibited irregular grain. The two phosphors exhibit green and cyan luminescence under 365 nm excitation, which are derived from the 5 d -4 f transitions of Eu 2+ and Ce 3+ , respectively. The quenching concentrations are 3 % and 4 % for Eu 2+ and Ce 3+ doped phosphors , respectively. The fluorescence intensity of Eu 2+ and Ce 3+ activated SiAlON powders decreased to 50 % of the room temperature intensity at 179 °C and 170 °C, respectively. The thermal activation energy values of the two phosphors were 0.35 eV, and the coordinate configuration diagram was constructed to comprehensively analyze the thermal quenching behavior of phosphors. Finally, the two phosphors powders were mixed with red and blue fluorophore to obtain white LEDs, showing low color temperature, high color rendering, high power unsaturation and long half-life. The SiAlON-based phosphors with excellent thermal stability obtained in this work achieve different wavelengths of luminescence in the green region. The results show that the β -Si 3 Al 3 O 3 N 5 phosphor can be used as a candidate material for high-quality green light supplement for wLEDs .
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APPLIED CATALYSIS A-GENERAL
·
2016
·
IF 4.012
Peng Sun,Rui-tang Guo,Shu-ming Liu,Shu-xian Wang,Wei-guo Pan,Ming-yuan Li
A series of MnEuOx catalysts were prepared by the co-precipitation method and used for selective catalytic reduction of NOx with NH 3 . It was found that the modification of MnOx catalyst by Eu with a Eu/Mn molar ratio of 0.1 could greatly enhance its SCR activity and broaden its operating temperature window, accompanied by good resistance to SO 2 and H 2 O. From the characterization results of N 2 adsorption, XRD, XPS, H 2 -TPR, it could be concluded that the larger surface area resulted from the inhibited crystallization of MnOx, the enrichment of surface Mn 4+ and chemisorbed oxygen, and the higher reducibility all made a contribution to the high SCR activity of MnEuOx-0.1 catalyst. Furthermore, the results of in situ DRIFTS study revealed the NH 3 -SCR reactions over MnOx and MnEuOx-0.1 were mainly controlled by L-H mechanism (<150 °C) and E-R mechanism (>150 °C) respectively, and the contribution of E–R mechanism became more important with increasing reaction temperature. The enhanced NO oxidation and NH 3 adsorption should be mainly contribute to the distinguished SCR performance of MnEuOx catalyst in the lower temperature range (<150 °C) and higher temperature range (>150 °C) respectively.
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ANALYST
·
2025
·
IF 3.3
Lingling Li,Doudou Lei,Pengyue Song,Qingbin Xu,Lihua Huang,Xiao Ma,Lidong Zhou,Ping Zhang,Weijun Kong
Sensitive detection of carbendazim (CBZ), a widely monitored bactericidal pesticide globally, is critical to reduce risks to human health. In this study, Eu ions were embedded into a rigid metal–organic framework (MOF), to prepare Eu-MOF as a fluorescence signal source, which was subsequently post-modified with polyethyleneimine (PEI) for efficient coupling with anti-CBZ monoclonal antibodies (mAbs). On this basis, a PEI@Eu-MOF-mAbs fluorescent probe-based lateral flow immunosensor (LFIS) was developed for CBZ analysis, enabling dual-mode detection: rapid visual qualitative observation by the naked eye and intelligent fluorescence quantitative analysis by using a smartphone. PEI modification not only effectively improved the zeta potential, fluorescence intensity, quantum yield, and biological coupling ability of the Eu-MOF to mAbs, but also significantly enhanced the stability and anti-interference performance of PEI@Eu-MOF. The introduction of PEI@Eu-MOF-mAbs probes characterized by strong fluorescence emission, long fluorescence lifetime, and low background interference, markedly improved the detection sensitivity of the LFIS platform for trace CBZ. Under optimal conditions, the detection limit for smartphone-assisted fluorescence analysis was as low as 1.3 pg mL−1 with a wide linear detection range of 0.25–125 ng mL−1 for CBZ. The recoveries in spiked Panax notoginseng samples were 93.40–106.0% with RSD <1.69%, indicating outstanding reliability of the newly developed LFIS platform for accurate detection of CBZ. In comparison with seven other common pesticides, CBZ produced significantly weakened and stable fluorescence, indicating good specificity and stability of the developed platform over 4 weeks. Compared with current analytical methods, the smartphone-assisted PEI@Eu-MOF-mAbs dual-modal LFIS platform exhibited advantages of simple construction, easy operation, rapid response, obvious visualization to the naked eye, and intelligent quantitative analysis, highlighting its broad application potential for rapid screening and accurate point-of-care detection of CBZ in a large number of foods and agricultural products.
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Laser & Photonics Reviews
·
2025
·
IF 10
Chuangchang Lei,Xiang Wu,Yaohua Li,Xu Xu,Guangzheng Zuo,Qiongrong Ou,Shuyu Zhang
Europium halide perovskites have emerged as promising candidates for environmental-friendly blue-emitting materials. However, their development is hindered by low photoluminescence quantum yields (PLQY, e.g. ∼2%–5% for intrinsic CsEuCl 3 ) and poor stability against air. Here, a one-step procedure is introduced for synthesizing Eu 2+ -doped CsSrCl 3 large nanocrystal clusters (CsSrCl 3 :Eu LNCs) with the effect of self-reduction, eliminating the use of conventional reductant oleylamine (OAm) and ensuring phase purity. CsSrCl 3 :Eu LNCs show photoluminescence emission centered at 430 nm with a full width at half maximum (FWHM) of 25 nm and a PLQY of ∼40%, which can be further enhanced to ∼97% after passivating the surface defects by adding trioctylphosphine (TOP), the highest among all reported lead-free blue-emitting perovskite nanocrystals. The stability of CsSrCl 3 :Eu can also be improved significantly by epitaxially growing a ZnS shell on the surface. This work will shed more light on lanthanide and alkaline-earth metal (AEM)-based perovskites for nontoxic light-emitting materials.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2023
·Vol. 129
·期 11
·1-8
·
IF 2.7
Wang Dongyang,Zou Wenhua,Chen Yexin,Duan Junhong
In this work, different percentages of Eu-doped TiO 2 nanoparticles were synthesized by sol–gel method. The bandgap and conduction band minimum (CBM) of TiO 2 nanoparticles doped by 0.075 at% Eu element is reduced from 3.43 and – 3.93 eV to 3.09 and – 4.25 eV, respectively, deduced from the results of ultraviolet–visible (UV–Vis) absorption spectroscopy and ultraviolet photoelectron spectroscopy (UPS) measurement compared with un-doped TiO 2 . As the increase of Eu concentration, short-circuit photocurrent density J sc of CdSe quantum dot-sensitized solar cells (QDSCs) increases from 10.86 to 13.86 mA/cm 2 , while open-circuit voltage V oc is almost invariable. Optimal power conversion efficiency (PCE) of 4.03% is achieved for CdSe QDSCs with 0.075 at% Eu-doped TiO 2 film. Compared with un-doped devices, the decrease of the chemical capacitance C μ and the increase of recombination resistance R rec of QDSCs based on the 0.075 at% Eu-doped TiO 2 photoanodes can facilitate charge extraction and suppress charge recombination at the TiO 2 /electrolyte interface.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Ping Feng,Sheng-Hua Zhou,Bing-Xuan Li,Jia-Xiang Zhang,Mao-Yin Ran,Xin-Tao Wu,Hua Lin,Qi-Long Zhu
In recent years, rare-earth-based chalcogenides have gained attention promising materials in the field of infrared nonlinear optical (IR-NLO) applications owing to their exceptional physicochemical properties. However, they frequently encounter challenges such as adverse two-photon absorption and low laser-induced damage thresholds (LIDTs) caused by narrow optical band gaps (Eg), which limit their practical utility. In this study, we started with the centrosymmetric (CS) parent compound EuGa2S4 to develop two new noncentrosymmetric (NCS) Eu-based chalcogenides, namely, EuZnSiS4 and EuCdSiS4, employing a rational cross-substitution strategy. Despite having identical stoichiometry, both compounds crystallize in distinct NCS orthorhombic space groups [Fdd2 (no. 43) vs Ama2 (no. 40)], as confirmed by single-crystal structure analysis. Their crystal structures feature highly distorted tetrahedral motifs interconnected via corner-sharing, forming unique two-dimensional layers that host Eu2+ cations. Furthermore, both compounds exhibit robust phase-matching second-harmonic generation (SHG) intensities of 1.5 × AgGaS2 for EuZnSiS4 and 2.8 × AgGaS2 for EuCdSiS4 under 2050 nm excitation. They also demonstrate high LIDTs (approximately 14–17 × AgGaS2), wide Eg (>2.5 eV), and transparency windows extending up to 18.2 μm. Particularly noteworthy, EuCdSiS4 stands out as a pioneering example in the Eu-based IR-NLO system for successfully combining a broad Eg (>2.56 eV, equivalent to that of AgGaS2) with a significant SHG effect (>1.0 × AgGaS2) simultaneously. Structural analyses and theoretical insights underscore that the reasonable combination of asymmetric functional units plays a pivotal role in driving the CS-to-NCS structural transformation and enhancing the NLO and linear optical properties of these Eu-based chalcogenides. This study presents a promising chemical pathway for advancing rare-earth-based functional materials and suggests exciting opportunities for their future applications in IR-NLO technologies.
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FOOD CHEMISTRY
·
2026
·
IF 10.4
Xiaolu Zhou,Ling Xia,Yufei Hu,Gongke Li
Preparation of γ-Al2O3/Eu-BTC for catalytic sensing toward terpenes. • A cyclic cataluminescence array sensor based on k-values corresponding to terpenes. • Investigation of the k -value pattern on the variation of terpene composition. • Origin identification of 86 hop samples based on characteristic terpenes. Hops are crucial to beer flavor, but their geographically dispersed origins are prone to confusion, while the significant variation in terpene ratios among hops from different regions provides key support for its origin identification. In this study，γ-Al 2 O 3 /Eu-BTC composite was synthesized for cyclic cataluminescence array sensor to terpenes. The results showed that the corresponding reaction decay coefficients ( k -values) for myrcene, farnesene, and humulene were 24.3, 32.0, and 73.8, respectively, enabling terpene-specific fingerprinting. Binary and ternary terpene mixtures exhibited predictable k -value variations, with relative standard deviations below 9.6%. A rapid detection method for hops identification was developed and successfully applied to 86 samples from six different origins. The method demonstrated both feasibility and accuracy, highlighting its potential as a rapid, simple, and efficient technique for origin identification of hops and other aromatic plants. Download: Download high-res image (160KB) Download: Download full-size image
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.8
Yourong Zhao,Yuhong Xie,Yiying Wang,Xin Jiang,Hongda Li,Daojiang Gao,Zhanglei Ning
Aniline, a toxic volatile organic compound, presents considerable risks to human health and environmental safety. In this study, we have developed a novel composite fluorescent probe, named as CPB@Eu-MOFs, fabricated through the integration of perovskite quantum dots (CPB) into a europium-based metal-organic frameworks (Eu-MOFs). This composite serves as a self-calibrating, ratiometric fluorescent probe for the detection of aniline. It exhibits high selectivity towards aniline over common interfering volatile organic compounds, as well as a high sensitivity with a detection limit of 4.72 × 10 −6 M and a wide linear response range from 5 × 10 −4 to 10 −1 M. A distinct photoluminescence color evolution from red to orange, yellow, green and finally blue is observed with increasing aniline concentration, enabling rapid visual quantification alongside instrumental analysis. This work proposes a convenient and reliable dual-mode sensing strategy, combining visual and ratiometric fluorescence readouts, for monitoring aniline in environmental and industrial safety applications.
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