Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 8
·2995-3002
·
IF 6.4
Wenwei Lai,Chuanli Wu,Xiuxun Han
CsPbBr3 nanocrystals (NCs) exhibit great potential for various optoelectronic applications due to their excellent optoelectrical properties. However, the poor stability inherited from the ionic crystal structure limits their practical applications. Hence, coupling CsPbBr3 NCs with protective and functional materials for achieving superior properties is one of the current research challenges. Herein, three-dimensional hyperbranched structures of Eu-MOF were developed as effective frameworks coupled with CsPbBr3 NCs. Rich Eu-MOF morphologies including sheaf-like, dumbbell-like, and urchin-like ones were achieved in a controllable way via introducing an Al(Ac)3 additive. The crystal splitting growth mechanism was found to dominate the formation of hierarchical Eu-MOF structures, as evidenced by the time-dependent morphological evolution of an urchin-like Eu-MOF. In addition, acidic carboxylate salts (such as Al(Ac)3, Zn(Ac)2, Pb(Ac)2, Cu(Ac)2, Ni(Ac)2) effectively modulate the splitting of Eu-MOF crystal growth, which is deemed to be the synergistic effect of metal ions and acetate ions. Subsequently, a series of CsPbBr3/Eu-MOF composites were synthesized by pre-preparing various Eu-MOF hyperbranched structures, and they demonstrate excellent dual-emissive optical properties. A ratiometric fluorescence probe fabricated by encapsulating CsPbBr3 in the three-dimensional hyperbranched Eu-MOF structure exhibits remarkable sensitivity, good linearity, and high selectivity for DMF detection.
✓ 已验证
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 1
·147-153
·
IF 3.9
Hongzheng Li,Ying Li,Bo Li,Wenlong Huang,Yushi Ding
ReNiO3 (Re = Pr, Sm, Eu) solid electrolytes were prepared by the sol–gel method, which were sintered in a pure oxygen atmosphere of 20 MPa at 1000 °C for 24 hours. The DC resistivities of the three materials in air and in a hydrogen-containing atmosphere were tested respectively. The resistivities in the hydrogen-containing atmosphere were about 102, 104, and 105 times higher than those in air and XPS analysis showed that after 10%H2–Ar treatment, the proportion of Ni2+ of PrNiO3, SmNiO3 and EuNiO3 increased successively. The proton transport number of PrNiO3 was lower than 0.5 at 50–500 °C, and SmNiO3 and EuNiO3 were almost pure proton conductors below 200 °C. The conductivities of SmNiO3 and EuNiO3 were 1.08 × 10−4 S cm−1 and 1.83 × 10−5 S cm−1 at 200 °C in 5%H2–Ar. The hydrogen sensing properties of SmNiO3 and EuNiO3 show that the measurement results of the two materials were accurate in the range of 0.5–10% H2.
研究领域:
材料科学
·
固态离子学
·
能源材料
·
无机化学
·
传感器技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Yao Jiang,Feifei Huang,Zheng Wang,Bingpeng Li,Junjie Zhang,Shiqing Xu
In this paper, the crystallization kinetics of the sample were systematically investigated, ultimately leading to the successful precipitation of CdS QDs within the borosilicate glass matrix through meticulously designed thermal processing protocols and compositional optimization. Structural and morphological analyses confirmed the in-situ precipitation of crystals with an average diameter of approximately 10 nm embedded in the glass matrix. Notably, the glass sample exhibited a remarkably broad emission band spanning the entire visible spectrum when excited at 396 nm. Additionally, incorporating Eu 3+ into the glass matrix and subjecting it to heat treatment at 500°C resulted in a significant enhancement of photoluminescence intensity and an improved quantum yield. Furthermore, integrating Eu 3+ -co-doped CdS QD glass with a 395 nm blue LED chip produced yellow light emission. This emission demonstrated a color purity of up to 97% and a correlated color temperature of 3402 K. These findings strongly indicate the potential application of Eu@CdS QD glass in micro-LED lighting technologies.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Peikun Yan,Yalin Qin,Zhiyu Xu,Fuxuan Han,Yaqi Wang,Zheng Wen,Yongcheng Zhang,Shujun Zhang
The 0.975[0.72Pb(Mg1/3Nb2/3)O3-0.28PbTiO3]-0.025Eu2O3 ceramics were prepared by a two-step sintering process including oxygen sintering and hot-pressing. An ultrahigh piezoelectric charge coefficient of 1400 pC/N and a superior optical transmittance up to 68% were simultaneously achieved. The underlying mechanism was discussed from a microstructural perspective, where the watermark domain configuration with a small domain size is responsible for the high optical transmission, while the large remanent polarization and dielectric constant and the introduced tetragonal phase with a parallel stripe domain structure are believed to synergistically contribute to the high piezoelectric coefficients. This work demonstrates that the rare-earth dopant in the PMN-PT ceramic system is conducive to enhanced transparency and piezoelectricity.
研究领域:
材料科学
·
陶瓷
·
压电材料
·
光电材料
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Xiaokai Xu,Xuejie Zhang,Chaofan Hu,Wei Li,Bingfu Lei,Yingliang Liu,Jianle Zhuang
The combination of carbon dots (CDs) and rare-earth ions has attracted increasing attention due to their unique fluorescence properties. Herein, CDs are incorporated with NaYF 4 :Eu to form stable NaYF 4 :Eu@CDs nanocomposites by a simple sol-gel route. It has been demonstrated that CDs are successfully embedded in the silica layer outside NaYF 4 :Eu nanoparticles. These nanocomposites exhibit characteristic emissions of both CDs and NaYF 4 :Eu under a single excitation wavelength. By using their dual-emissive properties, the nanocomposites can act as ratiometric fluorescent sensor for selective detection of Fe 3+ ions in the range of 0–350 μM. The temperature-dependent luminescent property of the nanocomposites makes them also suitable as thermometers in the range from 377 to 467 K. In addition, the luminescent color can be regularly adjusted by tuning the mass ratio of NaYF 4 :Eu to CDs. This combing strategy enables us to achieve dual emission of CDs and Eu 3+ ions in nanocrystals, opening an avenue towards multifunctional applications in widespread fields.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Linglong Yi,Shangzai Wu,Guojian Ren,Qi Zhou,Ping Li,Yuan Wang,Xudong Tian,Danfeng He,Qinhe Pan
Glyphosate is a widely used herbicide in agriculture, leading to residues in food and water environments. These residues have been associated with heart disease and neurotoxicity. Therefore, it is urgent to develop new types of sensors for the detection of glyphosate residues. Here, a new coordination polymer, named as HNU-89 , is synthesized by the assembly of Eu 3+ and coumarin-3-carboxylic acid (HCCA). Benefiting from the hydrophobic ligands, HNU-89 can maintain its structure at pH 2–11. In view of that phosphoric groups in glyphosate molecules can coordinate with Eu 3+ and compete with the HCCA ligand, according to the competitive coordination, the interaction weakens the red fluorescence of HNU-89 simultaneously enhancing the blue fluorescence of HCCA, which achieves the ratio fluorescence response for glyphosate detection. The limit of detection (LOD) is 0.08 ppm, meeting the requirements as a sensor. Furthermore, HNU-89 was utilized to detect glyphosate in soybean, corn, rice and tap water.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Jingxian He,Yongshan Ma,Zhen Jiang,Yuan Liu,Zhenfeng Jing,Shuhui Sun,Haixia Zhang,Fengqing Zhang
The aging phenomenon represents a major challenge for to the practical application of ferroelectric devices, primarily because of its detrimental impact on the material's physical and ferroelectric properties. In the present study, Bi 1-x Eu x FeO 3 (x = 0.0, 0.02, 0.04, 0.06) thin films with varying Eu doping concentrations were synthesized on ITO/glass substrates via the sol-gel method. A comprehensive investigation was conducted to analyze the impact of Eu doping on the structural, ferroelectric, ferromagnetic, leakage, and aging properties of the BFO films. X-ray diffraction (XRD) and Raman spectroscopy analyses confirmed the coexistence of R3c and Pnma phases in the film samples. X-ray photoelectron spectroscopy (XPS) analysis revealed the prevalent presence of Fe³ ⁺ and Fe²⁺ in all BEFO films, which effectively inhibited the formation of oxygen vacancies and the Fe³ ⁺ → Fe²⁺ charge transfer. Piezoresponse force microscopy (PFM) results revealed that the film with x = 0.04 exhibited the lowest surface roughness (R a ≈ 4.22 nm). Notably, at x = 0.02, the remanent magnetization (2.5 × 10⁻⁶ emu/g) was twice that of pure BFO. Additionally, at a doping concentration of 0.04, the BEFO₄ film sample exhibited significant, such as a high remanent polarization (88.82 μC/cm²) and a significantly reduced leakage current density (5.92 × 10⁻⁶ A/cm²), which corresponds to a 1.5-order-of-magnitude reduction compared to pure BFO. Furthermore, after 30 days of aging, the BEFO4 sample exhibited superior aging resistance to aging, suggesting its potential for long-term stability and reliability.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science Letters
·
2012
·Vol. 10
·期 1
·274-278
·
IF 0
Liu Chenglu,Wang Fang,Zhou Zhiqiang,Jia Peiyun
YNbO4:Eu nano-phosphors were successfully prepared in NaNO3 molten salt. X-ray diffraction was used to characterize the structure of the samples. The results indicate that a suitable amount of NaOH in NaNO3 molten salt can effectively improve the crystallinity
of the samples annealed at same temperature; meanwhile, the elevation of annealing temperature increases the crystallinity, and transfers the crystalline phase from scheelite to fergusonite. The micrographs of transmission electron microscopy reveal that the grain size increases with the elevation
of annealing temperature. Upon excitation into the niobate groups at 260 nm, YNbO4:Eu nano-phosphors exhibit weak emission at 405 nm, originated from Nb–O charge transfer transition and the characteristic emission of Eu3+, which indicates there is an energy transfer
from niobate group to Eu3+. Monitored by emission of 615 nm, the excitation spectrum shows that the f-f transition of 7F0–5L6 at 396 nm is more intense than the Nb–O charge transfer band at 260 nm. This intense absorption at
396 nm make YNbO4:Eu nano-phosphors an excellent candidate of white light emitting diode.
✓ 已验证
DOI
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2019
·Vol. 102
·期 9
·5243-5252
·
IF 3.094
Mengmeng Lun,Wei Wang,Zhifeng Xing,Zhong Wan,Wanying Wu,Hanzhao Song,Yinzhen Wang,Wei Li,Benli Chu,Qinyu He
The Eu 3+ -modified Bi 0.5 Na 0.5 TiO 3 (BNT) ceramics have been fabricated by the solid-state reaction method. The impact of Eu 3+ doping on the structure, photoluminescence, and electrical properties has been studied by XRD, SEM, PL spectra, and LCR meter. X-ray diffraction analysis reveals that the crystal structure of the samples is well matched with the trigonal perovskite, and the optimal temperature of presintering is 880°C. The Eu 3+ -doped BNT ceramics show excellent red fluorescence at 614 nm corresponding to the 5 D 0 → 7 F 2 transition of Eu 3+ under 466 nm excitation and relatively long fluorescence lifetime. The BNT-0.02Eu ceramic density is up to 5.68 g/cm 3 and the relative density is up to 94.6% with sintering temperature 1075°C. The piezoelectric constant (d 33 ) of samples has been significantly improved up to 110 pC/N by Eu 3+ doping. The BNT-0.03Eu ceramic presintered at 880°C and sintered at 1050°C has good dielectric properties and excellent luminescence properties. Eu 3+ -doped BNT ceramics make it potential applications for novel integrated electro-optical and multifunctional devices.
✓ 已验证
DOI
高影响因子
Science China-Chemistry
·
2023
·Vol. 66
·期 5
·1400-1405
·
IF 9.6
Ye Ming-Yu,Zhang Ming-Xuan,Xu Qiao-Fei,Xu Han,Long La-Sheng,Zheng Lan-Sun
Lanthanide luminescent materials with high quantum yield and thermal stability are of key importance for their practical application. Here we report crystal structures and luminescent properties of [Eu(pfbz) 2 (phen)Cl] ( 1 ) and [Tb(pfbz) 2 (phen)Cl] ( 2 ) (pfbz = Pentafluorobenzoate). Single-crystal analysis reveals that both 1 and 2 crystallize in a polar space group of Cmc 2 1 . Investigation on their luminescent properties indicates that the solid-state quantum yields of 1 and 2 are 97.7% and 90.7%, respectively, while their efficiency of the sensitization process is as high as 100%, revealing that polar structures are more favorable to obtain high quantum yields. Thermogravimetric analysis reveals that both 1 and 2 can be stable up to 240 °C. More importantly, temperature-dependent luminescent spectra of 1 indicate its luminescent intensity at 612 nm only decreased by 5% from room temperature to 373 K, whereas at 373 K, its luminescent intensity remains almost constant for 36 h. Considering that 1 represents the highest quantum yield among known Eu-coordination polymers and its performance as the LED material is better than that of commercially widely used luminescent materials of (Sr,Ca)AlSiN 3 :Eu (630 nm) and (Sr,Ca)AlSiN 3 :Eu (640 nm), the present work provides an excellent substitute for commercial LED materials.
✓ 已验证
DOI
高影响因子
Nanoscale
·
2019
·Vol. 11
·期 44
·21061-21067
·
IF 6.97
Meina Song,Yangyang Dang,Jie Dong,Xiaotao Zhang,Shengbin Lei,Wenping Hu
Lanthanide-based coordination polymers (CPs) have received great attention due to their tuneable structures and excellent luminescence properties. However, limited by the stability and micro/nanoscale morphology, a very small number of lanthanide-based CPs have been used for photonic applications. Herein, we present the synthesis of Eu-based CPs (compound 2) with highly regular one-dimensional (1D) microrod morphology by in situ structure transformation from compound 1. Moreover, the Eu-based CP microrods have an excellent stability and a high photoluminescence quantum yield (PLQY), and the distance-dependent PL spectra also exhibited typical characteristics of photoactive waveguides with a low optical-loss coefficient (0.00894 dB μm−1) during propagation. These intriguing behaviors not only extend the research field of optical waveguides through lanthanide-based CPs, but also provide an opportunity for further application in optical communication systems.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Mingyuan Zhao,Xiaoshuai Shen,Jing Wang,Jing Wang,Ji Zhang,Lei Zhao
Antiferroelectric (AFE) dielectrics are considered promising materials for pulse power applications due to their high energy density . However, the energy storage performance of AgNbO 3 lead-free AFE ceramics suffers from low breakdown strength ( E b ) and weak AFE stability at room temperature. Along these lines, in this work, the tape-casting process together with Eu-doping was used to improve E b and enhance AFE stability of the AgNbO 3 ceramics. As a result, an ultrahigh recoverable energy storage density of 10.0 J/cm 3 was obtained in the (Ag 0.91 Eu 0.03 )NbO 3 ceramic, which surpasses all the reported values of AgNbO 3 -based ceramics in the literatures. Meanwhile, the recoverable energy storage density of (Ag 0.91 Eu 0.03 )NbO 3 ceramic showed excellent temperature- and frequency-stability. Interestingly, a remarkable discharge energy density of 8.0 J/cm 3 was obtained in the pulsed charge/discharge test. These results clearly indicate that the (Ag 0.91 Eu 0.03 )NbO 3 ceramics prepared via the tape-casting process exhibit great potential for energy storage applications and shed light on the design of energy storage ceramics in other materials.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）