RSC Advances
·
2025
·Vol. 15
·期 36
·29989-29994
·
IF 4.6
Xin-Yu Liu,Shu-Jing Zhou(Co-author),Fang Luan,Yu-Hang Wang,Xiu-Juan Ma,Li-Yuan Sui,Yan-Ru Feng
Metal-organic frameworks (MOFs), characterized by their high porosity, large specific surface area, and tunable pore structures, have emerged as promising host materials for advanced functional applications. In this study, two organic dyes, fluorescent bleacher (CBS) and coumarin (C6), exhibiting blue and green fluorescence, respectively, were co-encapsulated into europium (Eu)-based MOFs, where Eu3+ served as the central metal to introduce red emission. The ligand employed was 9-butylcarbazole-2-carboxylhydrazide thiophene (Cz). A white fluorescent powder, coumarin/fluorescent bleacher/carbazole derivatives@Eu (C6/CBS/Cz@Eu), was synthesized using an in situ encapsulation method. The C6/CBS/Cz@Eu was incorporated into PVA to prepare a film. The resulting C6/CBS/Cz@Eu film demonstrated a high-quality white light emission under excitation by commercial 400 nm light-emitting diode (LED) chips, achieving ideal Commission Internationale de l'Éclairage (CIE) chromaticity coordinates of (0.34, 0.35) and a correlated color temperature (CCT) of 5267 K. This strategy offers a versatile and scalable method for the design and fabrication of white light-emitting materials, beneficial for the development of next-generation white light-emitting diode (WLED) technologies.
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DOI
PubMed
高影响因子
IEEE TRANSACTIONS ON ELECTRON DEVICES
·
2025
·Vol. 72
·期 12
·6872-6878
·
IF 3.2
Xiyuan Zhang,Wenhua Zou,Junhong Duan
In this study, titanium dioxide (TiO ${}_{{2}}\text {)}$ nanoparticles co-doped with varying ratios of Eu and Sm were synthesized using a hydrothermal method. The energy bandgap ( ${E}_{\text {g}}\text {)}$ and conduction band minimum (CBM) of TiO2 nanoparticles doped with 0.45 at% Sm@0.1 at% Eu were adjusted from 3.43 and −3.95 eV to 3.30 and −3.53 eV, respectively, determined from ultraviolet–visible (UV–Vis) absorption spectroscopy and ultraviolet photoelectron spectroscopy (UPS) measurements compared to undoped TiO2. CdSe quantum dot-sensitized solar cells (QDSCs) based on TiO2 doped with 0.45 at% Sm@0.1 at% Eu achieved an optimal power conversion efficiency (PCE) of 4.37%. Electrochemical impedance spectroscopy (EIS) revealed that the decrease in chemical capacitance ( ${\textit C}_{\mu }\text {)}$ and the increase in recombination resistance ( ${\textit R}_{\text {rec}}\text {)}$ of QDSCs based on 0.45 at% Sm@0.1 at% Eu-doped TiO2 photoanodes facilitate charge extraction and suppress charge recombination at the TiO2/electrolyte (EL) interface compared to undoped one.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Sijie Wang,Weishuang Fang,Daofu Wu,Kuiyi Meng,Ying Tang,Junfeng Yang,Mingjian Ding,Huixing Lin,Liang Fang
K20 microwave dielectric ceramics SrLnAlO 4 (Ln = Eu, Gd, and Ho) were prepared at 1440–1520 °C. SrEuAlO 4 and SrGdAlO 4 crystallized into tetragonal K 2 NiF 4 -type structures. While SrHoAlO 4 was a mixture (SrHo 2 Al 2 O 7 , Ho 2 O 3 , and Sr 3 HoAl 2 O 7.5 ) due to the too-small radius of Ho 3+ to bond in [HoO 9 ] dodecahedron . SrEuAlO 4 and SrGdAlO 4 exhibited near-zero τ f values of +1.7 and +4.3 ppm/°C and low ε r (19.37 and 19.14) along with contrasting Q × f values (70,030 and 5560 GHz). Compared with the modified molecular polarizability ( α Corr ) based on the bond valence deviation, the α obs values of SrEuAlO 4 and SrGdAlO 4 are much higher, indicating that their dielectric polarizabilities were underestimated, and this phenomenon was mainly influenced by rattling cations, which also causes their τ f with near-zero values. Due to the magnetic subsystem adversely affecting microwave dielectric losses , the worsened Q × f value of SrGdAlO 4 compared to that of SrEuAlO 4 is due to the high magnetic moment of Gd 3+ (7.94 μ B ).
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CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Youbing Zhu,Ketao Shi,Tao Zhang,Nianming Jiao,Hui Wang
One-dimensional microporous zeolite, EU-1, exhibits more favorable selectivity of propylene in cracking of petroleum components. However, it faced the problem of low catalytic activity for the poor utilization of active sites. In this work, dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride (TPOAC) was used to functionalize protozeolitic units and inhibit the excessive growth of crystals by the long hydrophobic alkyl chain. The introduction of TPOAC decreased the crystal sizes into nanoscale, enhanced the mesoporous volume of EU-1 zeolite, and exposed more external acid sites. Moreover, TPOAC could interact with Al species, and in this case, fewer Al atoms were incorporated into the zeolite framework, reducing the acid strength and amount. Intelligent gravitation analyzer test indicated that the zeolite prepared with the presence of 0.30 g TPOAC exhibited the largest accessible volumes in n-hexane adsorption, and the highest accessibility of acid sites, which synergistically promoted cracking of n-hexane for the production of light olefins.
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高影响因子
JOURNAL OF FLUORESCENCE
·
2024
·
IF 2.6
Gong Yafei,Fu Yan,Lou Dawei
Abnormal tryptophan (Trp) metabolism can be used as an important indicator of chronic hepatitis, paranoia, Parkinson’s disease and other diseases. Deficiency or excessive accumulation of Cu 2+ can cause diseases such as Wilson’s disease and Alzheimer’s disease. Eu-based metal-organic framework (Eu-MOF) was successfully prepared for fluorescence sensing of Trp and Cu 2+ in an aqueous solution (pH = 7.4). Eu-MOF showed high selectivity and sensitivity for Trp and Cu 2+ with detection limits of 0.22 µM and 0.09 µM and K sv of 6.17 × 103 M − 1 and 2.37 × 10 4 M − 1 respectively. Trp and Cu2+ had overlapped UV absorption spectra with that of Eu-MOF and competed for the excitation light source. Trp also attenuated the antennae effect of organic ligands on Eu-MOF, thus quenching the red fluorescence of Eu-MOF. This study provides insights into the application of MOFs in bioanalysis and diagnostics.
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PubMed
高影响因子
CHEMICAL PAPERS
·
2019
·Vol. 73
·期 7
·1761-1766
·
IF 1.246
Zhang Li-hui,Zhou Yan-biao,Li Wei-li,Zhao Xu-yao,Wang Ya-bo
Lu(OH)CO 3 :Ln 3+ /LuBO 3 :Ln 3+ (Ln = Eu, Tb) nanospheres have been synthesized by the soft chemistry route. This synthesis process does not require the addition of any organic solvents and surfactant. The whole process consists of homogeneous precipitation and hydrothermal process. First, uniform spherical Lu(OH)CO 3 :Ln 3+ (Ln = Eu, Tb) nanoparticles with the sizes of 70 nm were obtained by the classic urea-based homogeneous precipitation. Then, with the above Lu(OH)CO 3 :Ln 3+ (Ln = Eu, Tb) nanosphere as the precursor, the composites of Lu(OH)CO 3 :Ln 3+ /LuBO 3 :Ln 3+ (Ln = Eu, Tb) nanospheres formed by the simple hydrothermal process. The phases, morphologies, as well as the luminescence properties of as-prepared samples were characterized by means of X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, and photoluminescence. Under a short wavelength excitation, the down-conversion Eu 3+ and Tb 3+ -doped LuBO 3 samples were investigated and explained.
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高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 21
·5645-5652
·
IF 7.779
Yuan Lin,Chun-Li Hu,Zhi Fang,Jin Chen,Wei-Jie Xie,Yan Chen,Jian-Pu Wang,Jiang-Gao Mao
Three new potassium rare earth carbonates, namely KRE(CO3)2 (RE = Eu, Gd, Tb), were synthesized successfully. Their structures feature a novel [RE(CO3)2]− 3D framework with 1D channels along the c axis filled with K+ cations. Among them, KEu(CO3)2 and KTb(CO3)2 emit strong red and green photoluminescence, respectively. The birefringence values of KRE(CO3)2 were measured as 0.149, 0.162 and 0.215 at 546 nm, respectively. Remarkably, KTb(CO3)2 has the largest experimental birefringence among carbonates reported.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 27
·13129-13136
·
IF 3.925
Ping Zhang,Xianliang Li,Yan Xu
Excessive use of tetracycline (TC) exacerbates environmental pollution and seriously threatens human health. Therefore, it is of great significance to explore an effective approach for detecting TC. In this work, a water-stable and ratiometric luminescent sensor based on a dual-emitting Eu-based metal–organic framework (Eu-TCPE, H4TCPE = tetrakis(4-carboxyphenyl)ethylene) was established through a solvothermal method. Benefiting from the luminescence quenching behavior of H4TCPE linkers through the inner filter effect (IFE) and the enhanced fluorescence emission of Eu3+via the antenna effect, supported by the results of UV-vis absorption spectra and density functional theory (DFT) calculations, the Eu-TCPE sensor exhibited a fast and selective response towards TC detection with a low detection limit of 14 nM in a linear range of 0–50 µM. Application of the Eu-TCPE sensor in real samples of tap water and milk was also investigated. Furthermore, a test-strip-based sensor with the Eu-TCPE probe fixed on the surface was developed for the real-time selective detection of TC in aqueous solution, and the fluorescence color changes of the test strip under UV-light excitation can be captured using the portable online analyzer of a smartphone-color detector App, which showed a handheld platform for the rapid and visual detection of TC in practical applications.
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MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Yuanyuan Duan,Yongli Yu,Limei Wang,Shuang Zhao
In this work, a facile method for the preparation of dual-emission lanthanide nanoparticles (NPs) was developed. Tb 3+ -doped LaF 3 NPs coated with 2,6-pyridinedicarboxylic acid (DPA) and Eu 3+ , namely LaF 3 :Tb@DPA-Eu NPs, could produce characteristic emissions of Tb 3+ and Eu 3+ under 272 nm excitation, which originated from the absorption of DPA. The LaF 3 :Tb@DPA-Eu NPs with tunable emission peaks and color could be synthesized by changing the concentration of Eu 3+ . Additionally, the obtained NPs were comprehensively characterized by various analytical methods. Transmission electron microscopy (TEM) images showed that the average size of the NPs was ~15 nm. Moreover, X-ray diffraction (XRD) analysis revealed that the products were single-phase LaF 3 , while the doped Tb 3+ entered the LaF 3 lattice to occupy the La 3+ sites. Owing to their excellent water solubility and good optical properties , the LaF 3 :Tb@DPA-Eu NPs were used as a fluorescence probe for the detection of marbofloxacin (MAR) based on the fluorescence quench. Notably, an effective ratiometric fluorescence method was established. The approach exhibited good sensitivity and selectivity with a linear range of 0.10 ~ 10.0 μM and detection limit of 85 nM. It was successfully employed for the determination of MAR in milk samples with recoveries of 98.1%–106%. Thus, the fluorescence method based on the LaF 3 :Tb@DPA-Eu NPs developed herein provides a convenient and fast platform for the detection of MAR.
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高影响因子
ACTA MATERIALIA
·
2022
·
IF 9.209
Qian Liu,Ke-Feng Liu,Qi-Qi Wang,Xiao-Cun Liu,Fang Yu,Jian Liu,Yuan-Yuan Su,Sheng-Qing Xia
In this report, for the first time TiNiSi-type Zintl phases with the nominal formulae of ALiSb (A = Ca, Sr, Eu, Yb) were systematically investigated on their thermoelectric properties. The results indicated that ALiSb Zintl phases possessed intrinsically low lattice thermal conductivity despite the simple structure. In combination of thorough crystallographic and theoretical investigation, rattling-like scattering behavior originating from the Li atoms was suggested. As a result, the pristine ALiSb materials featured decent zT values of 0.4–0.7 at 823 K. With the electrical and thermal transport properties further optimized by configuring the solid solutions such as Sr 0.8 Eu 0.2 LiSb, the material approached a maximum zT up to 1.2 at the same temperature. These breakthroughs are distinct from the previous knowledge that low thermal conductivity in Zintl phases is usually realized through complex crystal structures, and for compounds with simple structures such as the TiNiSi type it is common to have poor thermoelectric performance. Owing to such a rattling-like scattering behavior, now light-element containing Zintl phases can be a promising resource for thermoelectric considerations as well. The mechanism is surely interesting and worth of in-depth investigation.
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OPTICAL MATERIALS
·
2017
·
IF 2.238
Guihua Cui,Dehai Zhao,Peng Lv,Zhengguo Gao,Shuiying Chen,Nannan Qiu,Toshifumi Satoh,Toyoji Kakuchi,Qian Duan
A series of novel fluorescent complexes was formed by chelation of the thermosensitive polymers with europium(III) ions. The polymers was synthesized via atom transfer radical polymerization (ATRP), which composed of poly( N -isopropyl acrylamide) (PNIPAM) and 2-amino-2-deoxy- d -glucopyranose( d -glucosamine, GA). The aqueous solutions of the polymers and its Eu(III) complexes exhibited a lower critical solution temperatures (LCSTs), and which were approximately equal to body temperature. The maximum emission intensity of the complexes at 613 nm was enhanced by a factor of approximately 10 relative to that of the corresponding Eu(III) chloride. Cell viability assays suggested that these thermosensitive polymers and Eu(III) complexes showed excellent biocompatibility in vitro.
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高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 48
·期 6
·8773-8778
·
IF 5.532
Xin Kang,Xiaohui Li,Xiaoyi Chen,Bo Gao,Pengjun Zhao,Zhaoyang Chen,Wenwen Kong,Aimin Chang
In this study, a series of novel negative temperature coefficient thermistor materials based on A 2 Ti 2 O 7 ( A = Sm, Eu, Y) titanate ceramics have been developed for high-temperature applications. The A 2 Ti 2 O 7 ( A = Sm, Eu, Y) ceramics showed cubic pyrochlore structures with dense morphology in X-ray diffraction and scanning electron microscopic analyses. These ceramics showed typical NTC characteristics in a wide temperature range of 673–1473 K, accompanied by resistance drift rates of 2.71%, 1.63%, and 4.95% for 400 h of ageing at 1173 K. The proposed ceramics have high resistivity and thermal constants B that ensure their better sensitivity at high temperatures and also show unique oxygen insensitivity. These properties outperform those of traditional high-temperature NTC materials composed of perovskite-type or scheelite-type ceramics, making A 2 Ti 2 O 7 ( A = Sm, Eu, Y) ceramics promising candidates for fabricating high-temperature NTC thermistors.
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