Journal of Environmental Chemical Engineering
·
2022
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IF 7.968
Xiaoyu Yang,Boming Tang,Xuejuan Cao
Continuous photocatalysis is achieved by using light-storing assisted photocatalytic composites, but little is known about the interactions between photocatalysts and long afterglow materials. g-C 3 N 4 /Sr 2 MgSi 2 O 7 :(Eu,Dy) with a sustained reaction activity was prepared by pyrolysis polymerization, and its optical-photocatalysis behaviors were studied. It was found that the light absorption ability and NO removal effect were improved, but the luminescence-afterglow performance became worse. The interface model of g-C 3 N 4 /Sr 2 MgSi 2 O 7 :(Eu,Dy) was constructed for the first time. On the basis of experimental analyses, its electronic structure and carrier transfer paths were studied by First-principles calculations, and reasons behind the changes in macro performance were revealed. The results showed that Eu 4 f electrons are difficult to return to the Eu 5d orbits after being captured by C 2p orbits, leading to the reduction of light energy radiation; the built-in electric field and energy band offsets between g-C 3 N 4 and Sr 2 MgSi 2 O 7 :(Eu,Dy) promote the transfer of photoinduced carriers, which follows a traditional type-II mechanism, resulting in enhanced photocatalytic activity and decreased luminescence-afterglow performance. This paper reveals the relationship between optical-photocatalysis behaviors and the electronic structure of g-C 3 N 4 /Sr 2 MgSi 2 O 7 :(Eu,Dy). It provides a reference for designing and optimizing light-storing assisted photocatalytic composites.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2025
·
IF 3.1
Yao Jie,Chen Hongfang,Yang Xiaohua,Iqbal Muzaffar,Bian Wei
Mercury ions (Hg 2+ ) are categorized as environmental pollutants, which distributed in water, soil, and food systems due to environmental contamination. Hence, designing a sensitive assay for the convenient determination of Hg 2+ is of great importance. Herein, S and O-doped graphite phase nitrogenized carbon quantum dots (S, O-C 3 N 4 QDs) was encapsulated within a europium -based metal-organic framework (Eu-MOF) to construct a novel ratiometric fluorescent nanoprobe for the quantitative detection of Hg 2+ . The native emission of S, O-C 3 N 4 QDs at 445 nm is used as a response signal, while Eu-MOF with fluorescence offers a reference signal at 619 nm. Hg 2+ exhibits high affinity for the surface functional groups of S/O-C 3 N 4 QDs, forming non-fluorescent chelation complexes that induce static quenching. This results in significant attenuation of the fluorescence intensity at 445 nm, while the emission at 619 nm remains invariant. A ratiometric fluorescence sensing platform was established based on the intensity ratio (F 445 /F 619 ) for the selective detection of Hg 2+ . The linear range of S, O-C 3 N 4 QDs/Eu-MOF of Hg 2+ was 0.25–35 µM and with a detection limit of 4.3 nM. The satisfying results demonstrate the effectiveness of the developed S, O-C 3 N 4 QDs/Eu-MOF-based fluorescence probe for Hg 2+ detection, highlighting its promising potential for environmental monitoring applications.
研究领域:
环境科学
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分析化学
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材料科学
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纳米技术
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
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IF 5.8
Xutao Yan,Haifeng Li,Zirui Li,Jihui Sun,Yijian Liu,Jiabao Zang,Li Sun,Meijie Zhang
Eu substituted Ba 3 Co 2- x Eu x Fe 24 O 41 (Co 2- x Eu x Z, x = 0, 0.5, 1) hexaferrites with multilayer nanoplate stacked and thickened along the c -axis were prepared without applying an external magnetic field to improve their microwave absorption performance. The crystal phase, structure and morphology of Ba 3 Co 2- x Eu x Fe 24 O 41 (Ba 3 Co 2- x Eu x Z) hexaferrites and the electromagnetic parameters and microwave absorption performance of Ba 3 Co 2- x Eu x Z hexaferrite/paraffin composites were characterized and analyzed. The maximum effective absorption bandwidth ( EAB max ) of Co 1.5 Eu 0.5 Z reached up to 8.21 GHz (5.37 GHz 13.58 GHz) at a coating thickness of 2.9 mm. Especially, when the coating thickness was only 3.4 mm, its EAB was 7.65 GHz (4.10 GHz 11.75 GHz), almost covering both the C and X bands, showing the excellent low frequency absorption performance. Meanwhile, the electromagnetic wave (EMW) dissipation mechanism of the samples was surveyed and dominated by the dipole polarization, interfacial polarization, natural resonance and exchange resonance. The impedance matching and EMW absorption performance of Ba 3 Co 2- x Eu x Z hexaferrites were finely regulated by Eu substituted Co and the multilayer nanoplate stacked structure.
研究领域:
材料科学
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电磁学
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纳米技术
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DOI
高影响因子
Analytical Methods
·
2023
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IF 3.1
Xin-Xin Dong,Tao-Li Chen,Xiangjuan Kong,Shuang Wu,Fang-Fang Kong,Qiang Xiao
In this work, a facile fluorescence Eu3+-based metal organic frameworks (Eu MOF) sensor for ascorbic acid (AA) and ascorbate oxidase (AAO) detection was developed. The fluorescence of Eu MOF could be effectively quenched by Ce3+ but not Ce4+ at an appropriate concentration, thus, when the reductant AA was added into the solution containing Ce4+, Ce4+ was chemically reduced to Ce3+, which induced the decreased fluorescence signal of Eu MOF. However, when AAO was introduced, AA was effectively oxidized to dehydroascorbic acid (DHAA) under the catalysis of AAO, thus, Ce4+ could not be reduced, resulting in the fluorescence restore of Eu MOF. Hence, the concentration of AA and AAO could be determined by the fluorescence decrease and restore of Eu MOF. The fluorescent platform showed high sensitivity with the limit of detection of 0.32 µM for AA and 1.18 U/L for AAO, respectively. Moreover, the proposed method was successfully applied for AA and AAO determination in real samples, indicating great potential for biomedical application in complex matrices.
研究领域:
分析化学
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生物医学工程
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材料科学
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DOI
PubMed
高影响因子
ACS Sensors
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2021
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IF 7.711
Zongbao Sun,Yunlong Gao,Zeng Niu,Haodong Pan,Xuechao Xu,Wen Zhang,Xiaobo Zou
Paper-based fluorescence devices, with smartphone aids, bring considerable operation convenience for tetracycline (TC) sensing. Nevertheless, they must meet the challenge in real determination against complicated backgrounds. Considering that, we present a programmable-printing paper-based device and then apply it to TC determination for various natural samples. MoS2 NPs and Gmp/Eu-Cit are synthetized as composite probes. A static quenching process is found with MoS2 NP fluorescence at 430 nm, while significant magnification of Gmp/Eu-Cit emission is obtained at 617 nm, establishing a valuable ratiometric indicator. Remarkably, two-stage programmable printing maximizes the proposed sensing capability. A transitive device, containing a gradually changing amount of a certain probe, is prepared to sense TC. With a homemade smartphone application and 3D-printed measurement chamber, the corresponding signals are examined to explore optimal setups. These setups are automatically processed to prepare the final-version device, not requiring manual operations. Benefitting from this interesting feature, the proposed device gains many rewards in performances. It effectively senses TC in a wide range from 12.7 nM to 80 μM and simultaneously provides naked eye-legible signals and smartphone-based readouts with confident selectivity and stability. This device is consequently applied for various samples of soil, river water, milk, and serum and meets well with HPLC–MS and recovery tests.
研究领域:
分析化学
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环境科学
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生物医学工程
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DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2023
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IF 4.6
Dongsheng Zhao,Wenqian Li,Rongmei Wen,Nana Lei,Wencui Li,Xin Liu,Xiutang Zhang,Liming Fan
With the introduction of Eu3+ ions as the secondary fluorescent signal reporter and sensing active sites, a dual-emission ratiometric sensor of Eu3+@NiMOF (Eu3+ functional NiMOF) for hippuric acid (HA) detection in urine and serum was fabricated via the postsynthetic encapsulating strategy. Based on the two emission signals at 441 nm (turn-on) and 628 nm (turn-off), the produced Eu3+@NiMOF ratiometric sensor provided enhanced sensitivity, higher selectivity, and 9.7 times lower limits of detection (LOD) for the detection of HA (2.38 μM, 0.42 μg·mL–1) than that of the pristine NiMOF. Considering the high sensitivity and visualization results, further exploration of intelligent applications in the HA sensing process was carried out by constructing a tandem combinational logic gate to improve the practicability and convenience with the help of a smartphone. This work provides a promising approach for developing MOF-based ratiometric sensors to detect biomarkers.
研究领域:
生物传感
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材料科学
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分析化学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Xiaoping Jiang,Yue Guo,Lixi Wang,Qitu Zhang
Multi-mode dynamic anti-counterfeiting materials can provide complex anti-counterfeiting performance and ensure the anti-counterfeiting strategy becomes more secure. Herein, a new type of multi-mode anti-counterfeiting encryption material of CaAl 12 O 19 :Eu, Er with different Er doping concentration was developed by sol–gel method. Interestingly, the CaAl 12 O 19 :Eu, Er phosphor and its composite have multi-mode anti-counterfeiting characteristics of multi-color down-conversion luminescence, up-conversion luminescence, dynamic luminescence, and photochromism. Effect of different Er doping concentration on the down-conversion luminescence, up-conversion luminescence, dynamic luminescence, and photochromism of CaAl 12 O 19 :Eu, Er was systematically investigated, and the relevant mechanisms were discussed. These anti-counterfeiting features can be simultaneously applied in both bright and dark fields, which can achieve high-level anti-counterfeiting in both spatial and temporal dimensions. The CaAl 12 O 19 :Eu, Er phosphors cannot be easily replaced by other materials with the same anti-counterfeiting properties. They display good application foreground in the field of anti-counterfeiting encryption.
研究领域:
材料科学
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光学
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防伪技术
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DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2024
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IF 18.5
Yu Bing,Zhao Song,Hongtao Jiang,Xiaoyi Xu,Zhongzheng Yu,Tingting Zhou,Tong Zhang
Water competitive adsorption and limited reaction sites on the micro-scale sensing area of micro-electro-mechanical system (MEMS) sensors are two bottleneck problems that restrict the detection of trace indoor polluted gases, leading to drifting and weak signals. To address this, a “duet-insurance” sensing strategy is proposed to protect and amplify the sensing signal. For the first-level protection, the well-designed double-layer structure consisting of Janus TpMa covalent organic framework (COF)/Eu-doped α-Fe 2 O 3 can resist diffusion of water molecules and facilitate the electron transfer from formaldehyde (CH 2 O) to sensing layers, benefiting from the outer hydrophobic character of Janus TpMa and the strong CH 2 O adsorption capacity of Eu-doped Fe 2 O 3 . For the second-level amplification, the unique variable temperature excitation facilitates the deep penetration of CH 2 O into the active sites across COF layers, enabling signal amplification through thermally actuated carrier modulation. The sensor demonstrates high sensing ability to the CH 2 O, with an ultra-low limit of detection of 794 ppt. Leveraging the novel sensing strategy, a multi-functional, visual sensing system is designed to identify multi-indoor pollution gases by feature signal encoding and color mapping, showcasing the promising potential for MEMS sensors based on Janus TpMa COF/Eu-doped α-Fe 2 O 3 materials.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
MICROCHIMICA ACTA
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2025
·Vol. 192
·期 4
·1-11
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IF 5.3
Ma Minghao,Hu Wei,Luo Shengdong,Pei Fubin,Lei Wu,Wang Jiang,Tong Zhaoyang,Liu Bing,Du Bin,Hao Qingli,Mu Xihui
Horseradish peroxidase (HRP) was used as a model glycoprotein, and a molecularly imprinted ratiometric fluorescence sensor based on a smartphone (NEB@MIP) was constructed using the sol–gel method for the fluorescence and visual detection of HRP. The sensor consisted of boronic acid-functionalized metal–organic frameworks (Eu-MOF-B(OH) 2 ) and nitrogen-doped carbon dots (N-CDs). The Eu-MOF-B(OH) 2 surface can not only load abundant N-CDs but also covalently bind with HRP through its boronic acid groups. The NEB@MIP exhibited two fluorescence emission peaks at 450 nm and 616 nm. When HRP was present, the fluorescence was quenched due to the internal filtering effect (IFE), but the quenching of N-CDs was more pronounced. Furthermore, the concentration of HRP in the range 0.05–10 µM showed a good linear relationship with the ratio of fluorescence intensity at 616 nm and 450 nm, with a detection limit (LOD) of 0.01 µM. Meanwhile, the sensor displayed a noticeable change in fluorescence color under different concentrations of HRP targets. Moreover, the sensor achieved satisfactory results in detecting simulated real samples, with recoveries ranging from 92.0% to 98.5% and RSDs between 1.5% and 3.3%. The detection platform based on the smartphone also performed well when detecting HRP in simulated real samples. Thus, this work provided a new approach for the portable detection of HRP. The method provides a new idea for the combination of ratiometric fluorescence molecular imprinting of glycoproteins and the portable detection platform of smart phones. Graphical
研究领域:
分析化学
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生物传感
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材料科学
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DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2025
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IF 5.1
Xinhan Chen,Gaofan Chen,Ya-Nan Feng,Lizhen Zhang,Yan Yu,Lingyun Li
Developing single-component white-light phosphors remains challenging due to the difficulty in achieving dual emission from mixed-valent activators. Herein, we present a carbon-modulated reduction synthesis (CARS) method to fabricate Eu2+/Eu3+ co-doped La3Si2O8Cl (LSOCl) phosphors without requiring hazardous reducing atmospheres. By modulating carbon content (Eu : C = 1 : 0–2.4), the Eu2+/Eu3+ ratio is effectively controlled, enabling tunable emission from pink to white and yellow under 365 nm UV excitation. The optimized LSOCl:7%Eu (Eu : C = 1 : 1.9) exhibits broadband emission (390–720 nm) with a high color rendering index (Ra = 85.05), cool white light (5489 K, CIE: 0.33, 0.38), and stable performance under varying currents. Additionally, LSOCl:7%Eu (Eu : C = 1 : 1.4) shows excitation-dependent chromaticity shifts: minimal changes under solar-blind UV (250–280 nm) but dramatic variations at 280–350 nm, facilitating rapid detection. A solar-blind UV detector was designed, demonstrating fast response, high resolution (50% CIE shift at 330 nm), and anti-interference capability. The CARS method offers an eco-friendly, scalable route for dual-emission phosphors, showcasing their dual utility in high-quality white LEDs and sensitive UV detection technologies.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
Zhongqian Hu,Qingyou Deng,Shuaishuai Yang,Dongcai Guo
A series of novel 2-quinolone ligands and their corresponding Eu(III) complexes were prepared. The effect of different solvents, different ligand concentrations and different substituents on the fluorescence intensity of ligands were investigated in detail. The fluorescence intensity of Eu(III) complexes were studied by comparing different substituents on the ligand. The results indicate that all ligands show the strongest fluorescence intensity in ethanol with the ligand concentration of 50 μM. Among these ligands, the ligand (K 6 ) containing -COOCH 3 group owns the strongest fluorescence intensity and the corresponding fluorescence quantum yield reaches 0.317. All complexes exhibit characteristic red light of Eu(III) ions with good thermal stability. The effect of diverse substituents on the fluorescence intensity is ordered: -COOCH 3 >-Cl> -Br> -OCH 3 >-CH 3 >-H, which indicates the complex [EuK 6 (NO 3 ) 3 ]·2H 2 O with the strongest electron-donating group (-COOCH 3 ) possesses the strongest fluorescence intensity. The above analysis shows that the ligand (K 6 ) and corresponding Eu(III) complex [EuK 6 (NO 3 ) 3 ]·2H 2 O own the best fluorescence property, which has an outstanding application prospect in the field of optical materials and biomedicine materials.
研究领域:
无机化学
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材料科学
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物理化学
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生物化学
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DOI
高影响因子
OPTICAL MATERIALS
·
2018
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IF 2.32
Xiaolin Zhang,Jianguo Tang,Haidong Li,Yao Wang,Xinzhi Wang,Yanxin Wang,Linjun Huang,Laurence A. Belfiore
This work demonstrated red light emitting nano-PVP fibers that incorporated with novel three-layer nanostructure of Ag@SiO 2 @Eu(tta) 3 phen nanoparticles (Ag@SiO 2 @Eu(tta) 3 phen-NPs), and the hybrid nano-PVP fibers were fabricated via a remarkably simple electrostatic spinning method. For Ag@SiO 2 @Eu(tta) 3 phen-NPs, the thickness of SiO 2 is optimized to obtain the maximum luminescent intensity , as results, the optimized thickness of SiO 2 is 20 nm. And the corresponding luminescent intensity (612 nm) of the Ag@SiO 2 @Eu(tta) 3 phen-NPs is enhanced up to 10 times compared with the pure Eu(tta) 3 phen complex, which indicates that with 20 nm SiO 2 thickness, the localized surface plasmon resonance (LSPR) effect of Ag@SiO 2 exhibits highest performance for enhancing luminescence. Moreover, the luminescent PVP fibers emit bright red light under the fluorescence microscope, which definitely confirms that the microenvironment provided by PVP polymer is absolutely suitable for the fluorescent composites.
研究领域:
材料科学
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纳米技术
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光学
·
聚合物科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）