Frontiers in Chemistry
·
2023
·
IF 5.5
Zhang Chen,Wang Minqiang,Shi Jindou,Wang Junnan,Da Zheyuan,Zhou Yun,Xu Youlong,Gaponenko Nikolai V.,Bhatti Arshad Saleem
The inherent single narrow emission peak and fast anion exchange process of cesium lead halide perovskite CsPbX3 (X = Cl, Br, I) nanocrystals severely limited its application in white light-emitting diodes. Previous studies have shown that composite structures can passivate surface defects of NCs and improve the stability of perovskite materials, but complex post-treatment processes commonly lead to dissolution of NCs. In this study, CsPb(Cl/Br)3 NCs was in-situ grown in TiO2 hollow shells doped with Eu3+ ions by a modified thermal injection method to prepare CsPb(Cl/Br)3/TiO2:Eu3+ composites with direct excitation of white light without additional treatment. Among them, the well-crystalline TiO2 shells acted as both a substrate for the dopant, avoiding the direct doping of Eu3+ into the interior of NCs to affect the crystal structure of the perovskite materials, and also as a protection layer to isolate the contact between PL quenching molecules and NCs, which significantly improves the stability. Further, the WLED prepared using the composites had bright white light emission, luminous efficiency of 87.39 lm/W, and long-time operating stability, which provided new options for the development of perovskite devices.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Analysis and Testing
·
2022
·Vol. 6
·期 4
·365-373
·
IF 0
Zhang Tian-Tian,Chen Zi-Han,Shi Guo-Yue,Zhang Min
The abuse of antibiotics has become a global concern, thus it is significant to develop simple antibiotic assays. Herein, a novel type of lanthanide-doped bovine serum albumin (BSA) derived carbon dots (BCDs) dubbed Eu-BCDs has been unveiled for ratiometric fluorescent detection of tetracycline (TC), which was formed from the one-step hydrothermal reaction of Eu 3+ and BSA. Upon challenge with TC, the blue fluorescence of Eu-BCDs at 448 nm was gradually quenched due to the internal filtration effect, while the characteristic red fluorescence of Eu 3+ at 618 nm was significantly enhanced owning to the antenna effect, leading to the ratiometric fluorescent detection of TC with fast response (2 min), a wide linear dynamic range (0–80 μmol/L), and high selectivity and sensitivity (limit of detection (LOD) of 3 nmol/L). Moreover, Eu-BCDs can be successfully applied for the ratiometric fluorescent detection of TC in environmental and biological samples, such as river water, milk, honey and serum. The Eu-BCDs sensing platform would have great application potential in view of its simple preparation, rapid response, high sensitivity and good selectivity.
✓ 已验证
产品关联
DOI
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Junshan Liu,Na Qi,Shengjuan Dong,Shikao Shi,Jiye Wang,Lianshe Fu
Synthetic-mica materials have shown multifunctional performances due to their distinctive adhesion and cation exchange ability. In this work, a novel Eu 3+ -doped synthetic-mica named as barium tetrasilicate fluorphlogopite (BaMg 2 Si 4 O 10 F 2 ) phosphor was prepared by the high-temperature solid state reaction process for the first time. The as-prepared mica samples possess a distinct lamellar structure , as indexed by X-ray diffraction, scanning and transmission electron microscopy means. The photoluminescence results manifest that the phosphor can generate bright red emission at 614 nm corresponding to the characteristic 5 D 0 → 7 F 2 transition of Eu 3+ as excited with UV light, and the luminescence intensity is nearly 9-fold in comparison with that in original fluorphlogopite. The more fantastic result is that the emission intensity at 373 K still retains 95 % in respect to that at ambient temperature, demonstrating the phosphor system with excellent optical thermal stability. The optimal BaMg 2 Si 4 O 10 F 2 :8%Eu 3+ phosphor powder has been used to discern the latent fingerprints on the surface of diverse non-porous and semi-porous substrates, which reveal the superior visibility as irradiated with 254 nm UV light. The Eu 3+ -doped BaMg 2 Si 4 O 10 F 2 synthetic-mica is a promising phosphor material for latent fingerprint identification application.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Shengyu Zhou,Xiaodan Jiao,Ying Jiang,Yanan Zhao,Peng Xue,Yingshuai Liu,Jing Liu
Two-dimensional MoS 2 (2D-MoS 2 ) and its nanocomposites have been extensively studied in cancer therapy research since their prominent surface area and NIR absorption ability. In this work, Eu 3+ -incorporated MoS 2 (MoS 2 :Eu 3+ ) nanoflowers with enhanced photothermal conversion efficiency (PCE) were successfully developed by a one-step bottom-up hydrothermal method. Under 808 nm near-infrared (NIR) laser irradiation, the photothermal agents MoS 2 :5%Eu 3+ nanoflowers have a PCE at ~ 49.05%, which is 1.75 times higher than the pristine MoS 2 . MoS 2 :5%Eu 3+ as efficient photosensitizers also promote generation of cytotoxic reactive oxygen species (ROS) under 808 nm laser irradiation, thus achieving photodynamic therapy (PDT) for cancers at the same time. Enhanced in vitro breast cancer therapy through the combination of photothermal therapy (PTT) and PDT is clearly proved by using the MoS 2 :Eu 3+ nanosheet as a multifunctional nanoprobe. The unique MoS 2 :Eu 3+ works as a promising nanoprobe for PDT/PTT cancer therapies, and also provides a novel strategy for PCE improvement of the 2D-MoS 2 .
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Yuhan Zhong,Qing Wang,Guangxue Chen
In this experiment, sodium carboxymethyl cellulose (CMC) was used as raw material, rare earth chloride was used as inorganic nano luminescent material to prepare a series of lanthanide rare earth ions-doped composite materials. The photoluminescent materials were prepared via in-situ chemical deposition of rare earth ions onto CMC surface with the help of carboxyl groups contained on the surface of CMC. The structure, fluorescence properties, surface morphology, surface elements, crystalline structure and thermal stability of CMC before and after surface modification were characterized by FT-IR spectra (FTIR), photoluminescence spectra (PL), field emission scanning electron microscope (FESEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and thermal gravimetric analyses (TGA), respectively. The results showed that CMC/LaF 3 :Eu 3+ composites were successfully prepared, and the fluorescence intensity can be organically controlled by the reaction temperature, doping ratio and doping concentration of rare earth ions. The method has mild reaction conditions, facile process without expensive material equipment. Moreover, the as-prepared transparent anti-counterfeiting film possessed good fluorescence intensity, transparency and excellent mechanical properties, which can be used for large-scale functional packaging films.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Hui Yu,Xinan Shi,Lijian Huang,Xiaojiao Kang,Daocheng Pan
Eu 3+ /Tb 3+ -doped CaMoO 4 /SrMoO 4 luminescent thin films were deposited by a facile solution method, and were annealed over the temperature range of 350–650 °C. Luminescent thin films were characterized by means of X-ray diffraction (XRD), photoluminescence (PL), UV–vis absorption, scanning electron microscope (SEM) and energy disperse spectroscopy (EDS). In addition, the effects of alkali metal ions (Li + , Na + and K + ) on the luminescence properties of CaMoO 4 /SrMoO 4 thin films were systematically investigated. We found that the optimal chemical compositions for the luminescent molybdate thin films are Ca 0.87 MoO 4 :Eu3+ 0.10, K+ 0.03, Sr 0.82 MoO 4 :Eu3+ 0.15, K+ 0.03, Ca 0.87 MoO 4 :Tb3+ 0.03, Li+ 0.1, and Sr 0.82 MoO 4 :Tb3+ 0.15, Li+ 0.03.
✓ 已验证
产品关联
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2019
·
IF 3.319
Mengjiao Xu,Yi Ding,Wanxia Luo,Luxiang Wang,Suxia Li,Yanhong Liu
A new multicolor-emitting Tb 3+ -Eu 3+ codoped KAlP 2 O 7 (KAPO) phosphor was synthesized by solid-state reaction under the air atmosphere. The synthesis, morphology, luminescence properties , energy transfer mechanisms and thermal stability of the synthesized phosphor were systematically investigated. The codoped phosphor exhibited the characteristic emission of Eu 3+ at 612 nm ( 5 D 0 - 7 F 2 ) and Tb 3+ at 544 nm ( 5 D 4 - 7 F 5 ). Under ultraviolet (UV) excitation, KAPO: Tb 3+ , Eu 3+ shows tunable emission from green-yellow to red with increasing of Eu 3+ concentration due to efficient Tb 3+ -Eu 3+ energy transfer. Based on the decay curves, the energy transfer from Tb 3+ to Eu 3+ was classified to be of dipole-dipole interaction resonant type with energy transfer efficiency of ~97%. The excellent luminescent properties and remarkable thermal stabilities suggested that KAPO: Tb 3+ , Eu 3+ is a promising UV-converting material for the fields of lighting and displays.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 53
·30790-30796
·
IF 3.049
Haoyang Zou,Lan Wang,Huaizhi Tao,Yi Liu,Meiqi Chang,Shiyu Yao
Recently, polyacrylamide (PAM) has been widely used in polymer flooding technology to enhance oil recovery and oil production. However, the difficulty in removing hydrolysed PAM (HPAM) from wastewater still seriously blocks the further application of polymer flooding in the oilfields. Herein, we demonstrate the preparation of SiO2@TiO2:Eu3+@TiO2 core double-shell microspheres (STT) through a two-step solvothermal and sol–gel coating strategy. The as-prepared STT exhibits an ideal photocatalytic activity for the photodegradation of HPAM. More importantly, by using STT as the model, the correlation between fluorescence intensity and photocatalytic activity of the photocatalysts is investigated. The results suggest their oppositional relationship. Since many kinds of photocatalysts are utilized in the degradation of organic pollutants, it is believed that our work will not only promote the development of photocatalysis in the field of oil extraction, but also offer a convenient method for evaluating the photocatalytic activity of the photocatalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 19
·10645-10650
·
IF 3.049
Tianhao Ji,Peidong Fan,Xueli Li,Zhipeng Mei,Yongyun Mao,Yanqing Tian
EDTA-bonded multi-connected carbon-dots (EDTA–C-dots) were prepared from carbon dot precursors and complexed with Eu3+ to give Eu3+-coordinated EDTA-bonded multi-connected carbon dots (Eu–EDTA–C-dots). Whereas EDTA–C-dots were readily soluble in DMSO, Eu–EDTA–C-dots could not be easily dissolved in DMSO, water, or other common organic solvents. The newly prepared materials were thoroughly characterized. The X-ray diffraction results showed that no crystalline phase of Eu oxides (europium oxide or europium hydroxide) could be observed in Eu–EDTA–C-dots. The infrared and UV-Vis spectra showed that coordination with Eu3+ ions did not damage the structure of the EDTA–C-dots. It was found that EDTA could be easily grafted on the surface of carbon dots and EDTA had minimal influence on the photoluminescence of the carbon dot matrix. In contrast, the existence of Eu3+ ions strongly quenched the photoluminescence of Eu–EDTA–C-dots. The measured and fitted decay lifetime indicated that Eu–EDTA–C-dots possessed two photoluminescence decay processes, i.e., radiative recombination and non-radiative recombination.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Z.M. Yu,L.F. Shen,D.S. Li,E.Y.B. Pun,J. Guo,H. Lin
Tb(acac) 3 (TAH) and Eu(TTA) 3 Phen (ETP) doped polyacrylonitriles (PAN) have been electrospun into heterogeneous hybrid TAH/ETP/PAN and core-shell structured [(TAH/PAN) core + (ETP/PAN) shell ] wire-shaped flexible nanofibers with diameter of ∼350 nm. Differential photon releasing behaviors reveal the double-color-emitting potential of Tb 3+ /Eu 3+ combination systems and verify the effectiveness of coaxial configuration in avoiding the cross-relaxation between different rare earth ions. Luminous fluxes of the hybrid and the coaxial systems exceed 283.5 and 326.3 μlm under the excitation of 308 nm UVB-LED pump source, respectively. By adopting coaxial electrospun configuration, the color coordinates are tuned from (0.561, 0.332) in TAH/ETP/PAN to (0.435, 0.366) in [(TAH/PAN) core + (ETP/PAN) shell ] fibers, which demonstrates that the core-shell structure is promising to extend the dimension of color tuning. Nanofibrosis and electrospun configurations furnish a desired approach to develop multifunctional one-dimensional nanomaterials for color displays and optoelectronic sensors .
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2019
·Vol. 21
·期 26
·3939-3947
·
IF 3.382
Wenpeng Xia,Jie Xiong,Li Jiang,Rui Ye,Yini Mao,Shanshan Hu,Jun Yang
KYb3F10:Ln3+ (Ln = Er, Ho, Tb, Gd, Eu, Sm, Ce and La) micro/nanocrystals with abundant morphologies were synthesized via a one-step hydrothermal route without employing any surfactants. Furthermore, the homogeneous and well-defined KYb3F10 crystals with truncated tetragonal bipyramidal, nanoparticle, nanospherical, microtubular and rugby ball shapes were achieved by manipulating the different environments of crystal growth, such as increasing the concentration of F−, adjusting the pH, using different fluorine sources and adding trisodium citrate. XRD, SEM, EDS and PL as well as lifetime analysis were used to characterize the products. The obtained KYb3F10:Ln3+ products showed bright emission colors red (Eu3+) and green (Tb3+), respectively. It has been found that larger crystal shapes/sizes can greatly enhance their luminescence properties and lifetimes due to their high crystallinity and few defects on the crystal surface. The as-synthesized KYb3F10:Eu3+/Tb3+ products might be potentially applied in multicolor lighting and displays.
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2019
·
IF 1.874
Qi-Fang Ren,Bo Zhang,Shao-Hua Chen,Su-Lei Wang,Qian Zheng,Yi Ding,Hai-Sheng Qian,Zhen Jin
The Eu 3+ doped YVO 4 nanocrystallines with various morphologies were successfully synthesized by an amines (TETA, ETA and EDA) assisted hydrothermal process. By rationally adjusting the adding amount of TETA, ETA and EDA, the trepang-like, globular-like and pineapple-like Eu 3+ doped YVO 4 nanostructures can be conventionally obtained. The as-prepared products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The XRD patterns indicate that these samples are all of the tetragonal structure. The SEM and TEM results show that the amines additives play an important role in morphology formation. Furthermore, the fluorescence properties of those samples are also systematically studied. Under the excitation of 280 nm, Eu 3+ doped YVO 4 : nanostructures emit strong red fluorescence due to the transitions of 5 D 1 - 7 F 1 and 5 D 0 - 7 F J (J = 1, 2, 3 and 4) of Eu 3+ ions. The intensity of red fluorescence is related to not only the concentrations of Eu 3+ , but also the types of adding amines. The effective luminescence lifetimes of the trepang-like Y 0.9 Eu 0.1 VO 4 nanocrystallines, the globular-lik and pineapple-like Y 0.95 Eu 0.05 VO 4 nanocrystallines are 0.91 ms, 1.02 ms and 1.14 ms, respectively. It is believed that this study is beneficial to promote the development of color display industry.
✓ 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）