Small Methods
·
2021
·Vol. 5
·期 10
·2100812
·
IF 14.188
Jialing Zhou,Ruoxi Zhao,Shikai Liu,lili Feng,Wenting Li,Fei He,Shili Gai,Piaoping Yang
The imbalance of Zn 2+ /Cd 2+ in the human body can lead to many serious diseases due to the overuse of antibiotics and deposition in animal products. Developing a functional material for detecting is challenging and in demand. Herein, silicon quantum dots (SiQDs) are designed as a functional platform for the detection of tetracycline and Zn 2+ /Cd 2+ . The COOH functionalized SiQDs with the emission wavelength of 450 nm are chelated with Eu(NO 3 ) 3 to form SiQDs-Eu 3+ ratio fluorescent probes, which can be used to detect tetracycline (TCs) and Zn 2+ /Cd 2+ by fluorescence resonance energy transfer (FRET) principle sequentially. The fluorescent probe showed good linearity between ion concentration and fluorescence enhancement. The detection limit of TCs and Zn 2+ /Cd 2+ are 0.2 × 10 −6 m and 3 × 10 −6 m , respectively, when the pH of the solution is 7.4. In addition, the synthesized SiQDs-Eu 3+ exhibited good stability (from 94.9% to 103.1%). The relative standard deviations (RSD, n = 10) of human serum and urine were both less than 3%. Therefore, the SiQDs-Eu 3+ ratio fluorescence probe will provide a good application prospect in actual sample detection.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2020
·
IF 5.977
Hao Guo,Xiaoqiong Wang,Ning Wu,Mengni Xu,Mingyue Wang,Longwen Zhang,Wu Yang
A novel dual-emission ratiometric fluorescent sensor (CDs@Eu-MOFs) has been synthesized successfully by encapsulating water-soluble fluorescent CDs into the chambers of Eu-MOFs via a simple one-pot hydrothermal method , which can be used for the detection of Hg 2+ in environmental water samples. The synthesized CDs@Eu-MOFs inherited simultaneously the excellent luminescence performance of Eu 3+ and CDs and exhibited good structural and fluorescence stability in aqueous solution. The presence of Hg 2+ changed the fluorescence intensity of CDs, while the fluorescence intensity of Eu-MOFs hardly changed, which could be used as the recognition part and the reference part respectively to construct the ratiometric fluorescence sensor. The obtained Hg 2+ fluorescent probe showed a wide linear range (0–300 μM) and a low detection limit (0.12 nM). The developed method can be used as a multi-functional fluorescent sensor with high sensitivity and good selectivity for the determination of Hg 2+ in actual water samples.
✓ 已验证
DOI
PubMed
高影响因子
TALANTA
·
2020
·
IF 5.339
Jing Wang,Daquan Li,Yu Qiu,Xinyue Liu,Liang Huang,Huimin Wen,Jun Hu
We reported Eu(III) functionalized carbon dots (CDs-Eu) as a novel ratiometric fluorescent probe for point-of-care testing (POCT) of dipicolinic acid (DPA), a biomarker of anthrax. The probe was synthesized simply by coordination interaction between Eu(III) ions and the CDs with carboxyl and amino groups. Upon addition of DPA, the intrinsic red luminescence of Eu(III) ions can be sensitized due to the presence of energy transfer when DPA chromophore coordinated with Eu(III) ions. The fluorescence peaking at 530 nm as a reference remained essentially constant, leading to ratiometric fluorescence response toward DPA. This approach exhibited a linearity range from 0.5 nM to 5 μM and a detection limit of 0.8 nM. More Importantly, the combination of probe-based test paper and smartphone provided a convenient approach for visual POCT of DPA with a detection limit of 67 nM, which was lower than other reported test paper for DPA detection. The color of fluorescence gradually changed from green to red as the DPA increases, which can be captured by a smartphone and further quantitatively analyzed with a built-in Color Analyzer App. The satisfactory result of detecting DPA accurately and reliably in real samples by the test paper certified its practicality in POCT of DPA.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Weilun Cheng,Ziming He,Na Ni,Yingzheng Liu,Di Peng,Xiaofeng Zhao
Phosphorescence thermal history sensors are off-line temperature measurement devices with potential applications in harsh environments. However, changes in phosphorescence after heating at various temperatures or for various durations cannot be precisely quantified based on current theory. In this study, europium-doped yttria-stabilized zirconia (YSZ:Eu) was selected as a potential thermal history sensor and its structural and phosphorescence properties were characterized after heating at various temperatures. It was found that the tetragonal-to-cubic phase transformation of zirconia had a major effect on the phosphorescence intensity ratio ( PIR ) of YSZ:Eu. Accordingly, theoretical and semi-empirical versions of a novel phase transformation–phosphorescence model were developed based on Judd–Ofelt theory and the Avrami equation, and were used to quantify phosphorescence changes induced by heating YSZ:Eu at various temperatures and for various durations. The results of a calibration experiment showed that the PIR increased from 0.5 to 1.0 as the heating temperature and heating duration increased from 900 °C to 1200 °C and from 10 min to 80 min, respectively. The mean relative fitting errors of the theoretical and semi-empirical model were 2.2 % and 5.6 %, respectively. Finally, thermal history measurement was demonstrated in a flame-impingement experiment that was conducted using a phosphor-coated plate subjected to two different heating durations. The phosphorescence signals collected by an industrial camera were processed to yield two-dimensional (2D) surface-temperature distributions of the plate and compared with those obtained using an infrared camera. The average differences between the 2D surface-temperature distributions obtained by the two methods were 5.9 °C and 6.5 °C for 40 min and 80 min heating durations, respectively. These findings enhance theoretical understanding of thermal history sensing and will facilitate advancement from single-point to 2D thermal history measurement.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Xiaoyue Yue,Long Fu,Jingwen Zhou,Yan Li,Min Li,Yawen Wang,Yanhong Bai
Antibiotic residues cause extensive damage to food security, thus arousing serious concerns. Hence, rapid and sensitive detection of antibiotic residues is crucial to food safety. This study aimed to propose a portable, visual, intelligent and rapid method for tetracycline detection. We developed a ratiometric fluorescent sensor based on the Eu 3+ -functionalized regular octahedral UiO-66-NH 2 material. The developed sensor could quantify tetracycline in the concentration range of 0.5–200 μM with a detection limit as low as 0.2 μM under the optimum conditions. Furthermore, the analytical results obtained using the designed sensor in the actual samples were basically consistent with those obtained using high-performance liquid chromatography. Based on these achievements, a smartphone application-integrated fluorescent testing paper was designed for facile, intelligent, and visual detection of tetracycline. The integrated portable sensor not only saved cost and time for testing but also provided a forward-looking approach to fast, sensitive detection of antibiotic residues.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 11
·6467-6474
·
IF 10.733
Naveed Ur Rahman,Wasim Ullah Khan,Shaukat Khan,Xiaojie Chen,Javid Khan,Juan Zhao,Zhiyong Yang,Mingmei Wu,Zhenguo Chi
Metal halide perovskite solar cells (PSCs) have been studied over the past few years and high power conversion efficiency (PCE) has been achieved. However, the adverse instability remains a key factor restricting wider application of PSCs. Herein, we report, for the first time, a viable strategy to incorporate a down conversion nanophosphor Sr2CeO4:Eu3+ (SCOE) into PSCs, and more importantly SCOE enables the PSCs with improvement in photovoltaic performance and UV-light stability. The SCOE-coated PSCs achieve a high current density of 23.70 mA cm−2 and a high PCE of 18.95%, which are increased by 9% and 14.15%, respectively, when compared to those of control devices (without an SCOE layer). Moreover, the SCOE-based PSCs retain 80% of their initial PCE value after 70 hours under UV-light irradiation and retain 78% of their initial PCE value after 75 days under ambient environment with 20–25% relative humidity. These results suggest that the incorporated SCOE down conversion material is a functional component of PSCs which broadens the solar spectral response, improving photovoltaic performance, and reduces UV-light-induced photodegradation by converting UV light to visible light, prolonging the device stability.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2018
·
IF 6.434
Jian Lu,Yilin Wu,Xinyu Lin,Jia Gao,Hongjun Dong,Li Chen,Yingying Qin,Liang Wang,Yongsheng Yan
The increasing amount of europium in aqueous environment from rare earth industry has become a serious environmental challenge. Significant efforts have been focused on ion-imprinting membranes (IIMs) for selective separation of ions from analogues. Based on ion-imprinting technique, we have developed Eu 3+ -imprinted nanocomposite membranes (Eu-IIMs) for selectively separating Eu 3+ from La 3+ , Gd 3+ and Sm 3+ . Polydopamine (pDA) was previously synthesized on basal membranes to augment the interfacial adhesion. Grapheme oxide (GO) and modified silicon dioxide (kSiO 2 ) were synergistically stacked on pDA-modified substrates to form hydrophilic nanocomposite membranes. Ag nanoparticles were modified on the surface to enhance anti-fouling performance. The temperature-controlled selective recognition sites were formed using N-isopropylacrylamide (NIPAm) and acrylamide (Am) as functional monomers as well as europium ions as templates by RAFT (reversible addition-fragmentation chain transfer) method. Large enhanced Eu 3+ -rebinding capacity (101.14 mg g −1 ), adsorptive selectivity (1.82, 1.57, 1.45 for Eu 3+ /La 3+ , Eu 3+ /Gd 3+ , Eu 3+ /Sm 3+ ) and permselectivity (3.82, 3.47, 3.34 for La 3+ /Eu 3+ , Gd 3+ /Eu 3+ , Sm 3+ /Eu 3+ ) were achieved on Eu-IIMs with superior regeneration performance. Additionally, the negligible damage of the membranes after buried for 20 d indicated the superior anti-fouling property of the Eu-IIMs. The ion-imprinted nanocomposite membranes synthesized in this work have shown great potentials for selective separation of rare earth ions.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2018
·
IF 4.244
Dazhuang Xu,Meiying Liu,Qiang Huang,Junyu Chen,Hongye Huang,Fengjie Deng,Yuanqing Wen,Jianwen Tian,Xiaoyong Zhang,Yen Wei
Lanthanide-doped nanoprobes have received significant attentions for utilization in biological sensing and imaging due to their unique optical properties . However, only few works were focused on fabrication of europium complexes based fluorescence polymeric nanoparticles (FPNs) with excellent biocompatibility and biodegradability . In this study, we fabricated the FPNs (named as Eu(TTA) 3 Phen-GluEG FPNs) with encapsulated europium complexes which show low cytotoxicity, high sensitivity and deep penetration. Free amine group present on europium complexes initiated the ring-opening polymerization (ROP) of side-chain modified glutamic acid NCAs, offering a simple and effective method to prepare europium core FPNs with a uniform size distribution. Europium (III) chelates were furnished with a functional polyamino acid shell to fabricate biocompatible and biodegradable FPNs. Biological evaluation results demonstrate that such fabricated FPNs process excellent biocompatibility and dyeing performance. Therefore, we can expect that the fabrication approach will attract much research interest and effort on the preparation of biodegradable probes for various biological applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Xiuying Yang,Dongping Su,Lianjun Song,Xueyu Wang,Qian Xiao,Qiuxia Feng,Songdong Ding
The synthesis, Eu 3+ complexation, and selective solvent extraction of trivalent americium (Am 3+ ) over trivalent europium (Eu 3+ ) in nitric acid solution by N-donor ligand of 3,5-bis(2-pyridyl)pyrazole (BisPypzH) were described. By using tert -butyl benzene as diluent, BisPypzH ligand in combination with 2-bromohexanoic acid demonstrated the extraction selectivity for Am 3+ over trivalent lanthanides (Ln 3+ ) with the separation factor ( SF Am/Ln ) value ranging from 14.3 to 59.4. Slope analysis showed the formation of 1:1 and 1:2 metal/ligand extracted species corresponding to the BisPypzH concentration below and above 0.025 mol/L, respectively, which was also confirmed by electrospray ionization mass spectrometry (ESI-MS) and dynamic light scattering (DLS) analyses. The extraction conformed to a cation-exchange model. Additionally, the 1:1 and 1:2 metal/ligand complexes were also observed in methanol solution and in solid state, severally, by means of UV–vis spectroscopy, luminescence spectroscopy and ESI-MS. Furthermore, the analyses of Fourier transform infrared spectra (FTIR), Raman spectra, and time-resolved laser-induced fluorescence spectra (TRLFS) indicated the presence of three bidentate NO 3 − and the absence of H 2 O molecules in the inner coordination sphere of the central Eu cation in the complex. Meanwhile, the stability constant for BisPypzH-Eu complex was also given.
✓ 已验证
DOI
高影响因子
TALANTA
·
2015
·
IF 3.545
Haiyan Cao,Zhaohui Chen,Yuming Huang
This paper reports an “off-to-on” fluorescence (FL) probe for sensitively and selectively detecting phosphate ions (Pi's). Fabrication of the probe was based on the competition between Pi's and tannic acid-stabilized copper nanoclusters (TA-Cu NCs) for Eu 3+ binding. The addition of Eu 3+ ions to TA-Cu NCs triggered the aggregation of TA-Cu NCs, which quenched the FL of TA-Cu NCs. After Pi addition, the aggregated TA-Cu NCs solubilized into the aqueous solution to facilitate the Pi-triggered dispersion of TA-Cu NCs. This phenomenon was due to the stronger binding ability between Pi's and Eu 3+ than that between TA and Eu 3+ , leading to FL recovery of Cu NCs. The degree of redispersion of TA-Cu NCs was directly related to Pi concentration. Thus, Pi concentration can be quantitatively determined by the change in FL of the TA-Cu NCs dispersion. Under the optimized conditions, the change in FL presented a linear relationship with Pi concentration from 0.07 μmol L −1 to 80 μmol L −1 . The limit of detection for Pi was 9.6×10 −3 μmol L −1 at a signal-to-noise ratio of 3. For Pi determination in real samples, only 1 mL water sample was needed. The proposed probe was highly sensitive, free from the interference of other common species in aqueous media, and particularly useful for the fast and simple diagnosis of water-eutrophication extent.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2024
·
IF 1.5
Zhou Xiayu,Wang Yue,Xiong Lihao,Song Jiayi,Zhou Huang,Li Le,Zhen Deshuai
Uranium plays a crucial role in the nuclear energy sector, yet its radiological and chemical characteristics can pose environmental and public health hazards. This study introduces a novel bimetallic system based on cation-cation interactions, involving the binding of europium ions (Eu 3+ ) to uranyl ions (UO 2 2+ ) via phosphate bridges. The method exhibits excellent linearity in the uranyl ion concentration range of 10–90 nM, with a detection limit as low as 10 nM. The system has been successfully applied to detect UO 2 2+ in actual water samples and for fluorescence imaging of UO 2 2+ in cells. These findings highlight the potential of Eu-P as a promising material for sensing UO 2 2+ , offering significant contributions to environmental monitoring and public health protection.
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Hanyu Wu,Jie Chen,Zengbo Su,Bin Ma,Yizhe Ji,Shuhan Lin,Dingfang Xu,Mingliang Kang
Europium(III), i.e., Eu(III), is chemically analogous to the trivalent lanthanides (Ln) and actinides (An). A good understanding of the adsorption behaviour of Eu(III) on mica group minerals is critical to the safety evaluation of the radioactive contamination. Nevertheless, the structural complexity of micaceous minerals makes it difficult to draw a consistent conclusion in the study of Eu(III) migration. In this work, we contrastively studied Eu(III) adsorption on dioctahedral muscovite and trioctahedral phlogopite as functions of pH, ionic strength, background electrolytes, interaction sequence, and fulvic acid (FA). Batch experiments showed that Eu(III) adsorption on both micas was strongly dependent on pH but quite independent on ionic strength that is determined by Na + . Planar sites are available on both muscovite and phlogopite while interlayer sites only on phlogopite under Na + and Ca 2+ electrolytes (not for K + and Cs + ). An interlayer expansion of phlogopite, as indicated by a newly appeared diffraction peak at ~6° 2-theta, occurred along with Eu(III) adsorption, which was also confirmed by transmission electron microscopy . Furthermore, the initial Eu(III) concentrations, the concentration ratios between Eu(III) and Cs + , and the reaction sequences of Eu(III)-electrolytes-FA affected both the adsorption behaviour of Eu(III) and reversely the structural alteration of phlogopite. The sequential extraction showed that the adsorbed Eu(III) was mainly in the ion-exchangeable form while the addition of FA could increase the portion of coordinative species. The currently proposed Eu(III) adsorption mechanism can shed new light on predicting the migration of Ln/An(III) at the mica-rich solid-liquid interface on a molecular scale.
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）