JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Jiantao Lü,Ting Fan,Jie Liang,Yayun Zhou,Tingting Deng,Ruming Jiang
With the combination of carbon quantum dots (CDs) and rare earth-doped fluorescent materials, multi-mode luminescence can be achieved in fluorescent ink, thereby enhancing its anti-counterfeiting security coefficient. However, the self-quenching process in CDs currently hinders their application in the field of anti-counterfeiting. In this study, we employed simple chemical method to prepare the SiO 2 -encapsulated YVO 4 :Eu 3+ /CDs nanocomposites, which greatly improved the stability of the composite and achieved dual-mode solid-state luminescence. Quick response code anti-counterfeiting patterns were fabricated using screen printing technology, and dual-mode luminescence performance with red and blue emission was achieved under excitation at 254 nm and 365 nm respectively. The YVO 4 :Eu 3+ @SiO 2 @CDs nanocomposites showed stable dual-mode luminescent performance in both solid-state and solvent environment, demonstrating great potential in anticounterfeiting and information protection application.
研究领域:
材料科学
·
光学
·
防伪技术
✓ 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.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2013
·Vol. 6
·期 3
·915-923
·
IF 1.855
Zhilong Song,Chunbo Liu,Jianming Pan,Yongsheng Yan,Xiao Wei,Minjia Meng,Ping Yu,Lin Gao,Jiangdong Dai,Shuang Lin
Porous silica nanospheres were fabricated using a facile surface-protected etching strategy. Polyvinylpyrrolidone (PVP) was used as a protecting polymer adsorbed on the surface of silica nanospheres and NaOH was employed as an etching agent. Owing to the protective action of PVP and inhomogeneous etching, mesopores were created in the silica nanospheres. Then, based on a simple and economical wet-chemical route, highly luminescent YVO4:Eu3+ nanocrystals were then integrated onto the nanospheres to form a highly luminescent mSiO2/YVO4:Eu3+ composite material. This material, which combined the mesoporous structure of SiO2 and the strong red luminescence property of YVO4:Eu3+, could be used as a novel optosensing system. The structure, morphology, porosity, and optical properties of the materials were well characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, N2 adsorption/desorption, and photoluminescence spectra, and the optical stability and effect of pH on mSiO2/YVO4:Eu3+ were also evaluated. It was observed that λ-cyhalothrin (LC) could quench the luminescence of mSiO2/YVO4:Eu3+ in a concentration-dependent manner, which was best described by a Stern–Volmer-type equation. This study therefore demonstrated that the composite material could be potentially used as a probe to monitor the residues of LC in water.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2023
·Vol. 7
·期 12
·2300215
·
IF 7.9
Siwei Gu,Zheng Lu,Shuai Zou,Chengkun Wu,Chen-wei Peng,Mengfei Ni,Zhenzhen Chen,Hao Huang,Hua Sun,Haibo Wang,Xiaohong Zhang,Xiaodong Su
Herein, a solid strategy to prepare bifunctional SiO 2 coatings (BSCs) with both antireflection and luminescence downshifting properties by in situ generating YVO 4 :Eu 3+ ,Bi 3+ phosphors in SiO 2 antireflection coatings (ARCs) is reported. Namely, a self-prepared precursor solution of the downshifting phosphors is added to a mixture of commercial SiO 2 sol solution and ethanol to uniformly coat the surface of quartz glass; therefore, a novel composite porous SiO 2 coating containing in situ generated YVO 4 :Eu 3+ ,Bi 3+ phosphors (labeled SiO 2 @YVO 4 :Eu 3+ ,Bi 3+ coating) is formed on the glass surface after annealing. The SiO 2 @YVO 4 :Eu 3+ ,Bi 3+ BSCs can effectively convert ultraviolet (UV) region photons to visible photons that are well absorbed by silicon solar cells and have better transmittance than pure SiO 2 ARC. As proof-of-concept applications, the as-prepared optimal SiO 2 @YVO 4 :Eu 3+ ,Bi 3+ coating can effectively improve the photoelectric conversion efficiency (PCE) of tunnel oxide passivated contact solar cells by 0.18%abs and decrease the UV-induced degradation value of the PCE of silicon heterojunction solar cells by 0.62%abs compared to the pure SiO 2 ARC. The results demonstrate that in situ generating luminescence downshifting phosphors in the SiO 2 ARC of photovoltaic glass is a promising way to improve the PCE and UV stability of silicon solar cells.
研究领域:
材料科学
·
光伏技术
·
光电子学
✓ 已验证
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2014
·
IF 1.991
Lina Liu,Hongyu Xiao,Xiuyun An,Yongsheng Zhang,Ruifei Qin,Lishuang Liu,Dongmei Zhang,Ruirui Sun,Linfeng Chen
Well-dispersed YVO 4 :Eu 3+ nanoparticles (NPs) of about 8 nm were synthesized by a precipitation reaction and they were coated with SiO 2 by a reverse microemulsion method. The thickness of SiO 2 shells was altered by changing the molar ratio of tetraethoxysilane (TEOS)/YVO 4 :Eu 3+ . The influence of SiO 2 coating on the photoluminescence properties of the YVO 4 :Eu 3+ NPs was studied in detail. With the increase of the SiO 2 shell thickness, the intensity ratio of 5 D 0 - 7 F 2 / 5 D 0 - 7 F 1 becomes lower. It was interesting to observe that the quantum yield of naked YVO 4 :Eu 3+ is higher than that of YVO 4 :Eu 3+ @SiO 2 nanocomposites, and the result is opposite to a previous reference.
研究领域:
材料科学
·
纳米技术
·
发光材料
·
光学性能
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2014
·
IF 2.075
Lina Liu,Surong Yue,Yongsheng Zhang,Ruifei Qin,Lishuang Liu,Dongmei Zhang,Ruirui Sun,Linfeng Chen
Core–shell structured YVO 4 :Eu 3+ @SiO 2 nanocomposite particles were synthesized using a one-pot reverse microemulsion method and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), UV absorption spectra , and photoluminescent spectra. The nanocomposite particles are well-dispersed and about 20 nm in average size. The synthesis method is of one-pot, simplifying the preparation of this kind of core–shell structured nanocomposites. The formation process of these nanocomposite particles is suggested and the photoluminescence properties of them are studied and compared with those of uncoated YVO 4 :Eu 3+ sample.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2016
·
IF 7.476
Wei Li,Haoran Zhang,Shi Chen,Yingliang Liu,Jianle Zhuang,Bingfu Lei
A facilely prepared ratiometric fluorescent molecularly imprinted sensor has been constructed for highly sensitive and selective detection of 4-nitrophenol (4-NP) using carbon dots (CDs) as the target sensitive fluorophore and YVO 4 : Eu 3+ nanoparticles (NPs) as the reference fluorophore. Through the hydrolysis and condensation reactions of the silica precursor, CDs and YVO 4 Eu 3+ NPs can be incorporated into silica networks through silylation reaction by one pot synthesis procedure. The as-prepared fluorescent molecularly imprinted sensor shows characteristic fluorescence emissions of CDs (blue) and YVO 4 :Eu 3+ (red) under a single excitation wavelength. With the addition of 4-NP, the fluorescence of CDs is selectively quenched, resulting in the ratiometric fluorescence response. Under optimum conditions, the proposed sensor exhibits a high sensitivity with a linear range from 0 to 12.0 μM and shows the limit of detection as low as 0.15 μM in the determination of 4-NP, which is probably benefits from the tailor-made imprinted cavities for binding 4-NP. Furthermore, the proposed method was successfully applied for the determination of 4-NP in real water samples and human urine samples with great potentials for monitoring of 4-NP in environmental application.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2017
·
IF 5.951
Wentao Gan,Shaoliang Xiao,Likun Gao,Runan Gao,Jian Li,Xianxu Zhan
Natural wood is functionalized using the index matching poly(methyl methacrylate) (PMMA) and luminescent γ-Fe2O3@YVO4:Eu3+ nanoparticles to form a novel type of luminescent and transparent wood composite. First, the delignified wood template was obtained from natural wood through a lignin removal process, which can be used as a support for transparent polymer and phosphor nanoparticles. Then, the functionalization occurs in the lumen of wood, which benefits from PMMA that fills the cell lumen and enhances cellulose nanofiber interaction, leading to wood composites with excellent thermal properties, dimensional stability, and mechanical properties. More importantly, this wood composite displays a high optical transmittance in a broad wavelength range between 350 and 800 nm, magnetic responsiveness, and brightly colored photoluminescence under UV excitation at 254 nm. The unique properties and green nature of the luminescent wood composite have great potential in applications including green LED lighting equipment, luminescent magnetic switches, and anti-counterfeiting facilities.
研究领域:
材料科学
·
光学工程
·
林业工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Cheng-Kun Wu,Shuai Zou,Chen-Wei Peng,Si-Wei Gu,Meng-Fei Ni,Yu-Lian Zeng,Hua Sun,Xiao-Hong Zhang,Xiao-Dong Su
The ultraviolet (UV) light stability of silicon heterojunction (SHJ) solar cells should be addressed before large-scale production and applications. Introducing downshifting (DS) nanophosphors on top of solar cells that can convert UV light to visible light may reduce UV-induced degradation (UVID) without sacrificing the power conversion efficiency (PCE). Herein, a novel composite DS nanomaterial composed of YVO 4 :Eu 3+ ,Bi 3+ nanoparticles (NPs) and Ag NPs was synthesized and introduced onto the incident light side of industrial SHJ solar cells to achieve UV shielding. The YVO 4 :Eu 3+ ,Bi 3+ NPs and Ag NPs were synthesized via a sol–gel method and a wet chemical reduction method, respectively. Then, a composite structure of the YVO 4 :Eu 3+ ,Bi 3+ NPs decorated with Ag NPs was synthesized by an ultrasonic method. The emission intensities of the YVO 4 :Eu 3+ ,Bi 3+ nanophosphors were significantly enhanced upon decoration with an appropriate amount of ∼20 nm Ag NPs due to the localized surface plasmon resonance (LSPR) effect. Upon the introduction of LSPR-enhanced downshifting, the SHJ solar cells exhibited an ∼0.54% relative decrease in PCE degradation under UV irradiation with a cumulative dose of 45 kW h compared to their counterparts, suggesting excellent potential for application in UV-light stability enhancement of solar cells or modules.
研究领域:
材料科学
·
能源技术
·
纳米技术
✓ 已验证
DOI
高影响因子
TALANTA
·
2014
·
IF 3.511
Chunbo Liu,Zhilong Song,Jianming Pan,Yongsheng Yan,Zhijing Cao,Xiao Wei,Lin Gao,Juan Wang,Jiangdong Dai,Minjia Meng,Ping Yu
In this study, surface molecularly imprinted YVO 4 :Eu 3+ nanoparticles with molecular recognitive optosensing activity were successfully prepared by precipitation polymerization using λ-Cyhalothrin (LC) as template molecules, methacrylic acid and ethylene glycol dimethacrylate as the polymerization precursors which could complex with template molecules, and the material has been characterized by SEM, TEM , FT-IR, XRD, TGA and so on. Meanwhile, the as-prepared core–shell structured nanocomposite (YVO 4 :Eu 3+ @MIPs), which was composed of lanthanide doped YVO 4 :Eu 3+ as fluorescent signal and surface molecular imprinted polymers as molecular selective recognition sites, could selectively and sensitively optosense the template molecules. After the experimental conditions were optimized, two linear relationship were obtained covering the concentration range of 2.0−10.0 μM and 10.0−90.0 μM, and the limit of detection (LOD) for LC was found to be 1.76 μM. Furthermore, a possible mechanism was put forward to explain the fluorescence quenching of YVO 4 :Eu 3+ @MIPs. More importantly, the obtained sensor was proven to be suitable for the detection of residues of LC in real examples. And the excellent performance of this sensor will facilitate future development of rapid and high-efficiency detection of LC.
研究领域:
分析化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）