JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Xiaoping Jiang,Yifan Shen,Yiren Wu,Jinpeng Ding,Zhiyu Qu,Pengde Han,Lixi Wang,Qitu Zhang
Dual-mode anti-counterfeiting materials with photochromic and dynamic luminescent properties can improve the security of anti-counterfeiting and encryption. This study aimed to synthesize CaAl 12 O 19 :Eu, Ce phosphors with photochromic and dynamic photoluminescent properties. With the extension of 254-nm UV radiation time, the surface of the CaAl 12 O 19 :Eu, Ce phosphors changed in color from white to brownish yellow and was bleached by heating at 520 °C for 5 min, exhibiting excellent fatigue resistance and thermal stability. After co-doping Eu and Ce in CaAl 12 O 19 , the photochromic performance significantly improved, with the ΔR value increasing by 2.6- and 1.8-fold that of the CaAl 12 O 19 :1.0%Eu and CaAl 12 O 19 :1.0%Ce samples, respectively. After 254-nm UV irradiation, the CaAl 12 O 19 :Eu, Ce samples showed time-dependent dynamic luminescence characteristics, changing in color from orange-red to magenta. The mechanisms responsible for the photochromic and dynamic luminescence properties were further investigated. Overall, owing to their photochromism and dynamic photoluminescence, the CaAl 12 O 19 :Eu, Ce/polydimethylsiloxane composites could be applied in advanced anti-counterfeiting and information encryption with higher security in both the bright and dark fields.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2026
·
IF 5.9
Yue Li,Ping Liu,Xiaoxue Han,Longyu Guo,Haiyan Jiang,Yongchao Ma
A heterojunction with g-C 3 N 4 @Zn/Eu-MOF covalent interface was synthesized. • g-CN@MOF can be used for photocatalytic degradation and fluorescence detection of ofloxacin. • Efficient removal of ofloxacin in milk by g-CN@MOF foam. • g-CN@MOF can detect ofloxacin residues in milk through smartphone-assisted color recognition. Ofloxacin (OFL) is widely used in medicine and animal husbandry, and its residues in milk raise substantial food-safety concerns. Herein, a dual-functional covalently coupled g-C 3 N 4 @Zn/Eu-MOF composite (g-CN@MOF) was constructed through a one-pot hydrothermal route. FTIR and XPS analyses indicated the formation of C N C O linkages between g-C 3 N 4 and the MOF, yielding an interfacially coupled type-II heterojunction that promoted charge separation. The optimized g-CN@MOF-30 achieved 69.21% removal of 10 mg L −1 OFL within 120 min under visible light, with •O 2 − and •OH identified as the dominant reactive species. Meanwhile, the fluorescence intensity ratio F 440 /F 595 showed a linear response to OFL over the range of 0–100 μM, affording a detection limit of 0.011 μM through an IFE-dominated ratiometric sensing mechanism. After immobilization in sodium alginate foam, the composite exhibited convenient recyclability and enabled OFL removal from pretreated milk samples, while smartphone-based RGB analysis provided rapid visual semi-quantification with recoveries ranging from 100.3% to 109.9%. Download: Download high-res image (269KB) Download: Download full-size image
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NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.6
Biyang Quan,Peng Guan,Fangfang Chen,Longfei Ye,Zhichen Yue,Ruize Ma,Huifeng Zeng
Based on thenoyltrifluoroacetone (TTA) as the anionic ligand, three europium(III) complexes Eu(TTA)3(L1)2 (E1), Eu(TTA)3(L2)2 (E2) and Eu(TTA)3(L3)2 (E3) were successfully synthesized by using different phosphine oxide auxiliary ligands: trioctylphosphin oxide(L1), triphenylphosphine oxide (L2), and trimethylphosphine oxide (L3). The structures and optical properties of E1, E2, and E3 were systematically characterized by elemental analysis, infrared spectroscopy, single-crystal Xray diffraction and fluorescence spectroscopy. It was found that E1 and E2 exhibited superior luminescence properties in aggregated state within an ethanol/water binary mixture, attributed to the self-assembly behavior induced by the long alkyl chain of L1 and the greater steric bulk of L2. Simultaneously, as compared with the classical complex Eu(TTA)3phen (E4, phen=1,10-phenanthroline), scanning electron microscopy confirmed the characteristic structures of the Eu complexes in the ethanol-water mixed system. Subsequently, the ethanol-water mixed system and 1% doped PMMA (polymethyl methacrylate) films were prepared using the complexes, followed by UV aging tests. The results show that compared to E3 and E4, the uniquely structured ligands E1 and E2 not only enhanced the luminescence performance of EuIII complexes in the aggregated state but also significantly improved the photostability of EuIII complex materials. This research provides a potential strategy for designing and preparing rareearth complex materials that combine excellent luminescence properties with high photostability.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xunzhe Xu,Pengjie Zhong,Jinhua Hu,Manyu Shang,Qianqian Wang,Esmaeil Heydari,Gongxun Bai
Combining GO with Eu-doped SnSe enables exceptional broadband solar absorption and photothermal conversion. • A porous hydrophilic PAM hydrogel substrate facilitates highly efficient water transport and concurrent photon capture. • Excellent salt rejection and water purification capabilities were demonstrated for seawater and dye-containing wastewater. Solar-driven interfacial evaporation technology has attracted considerable attention as a promising strategy to address global freshwater scarcity. However, existing evaporators often suffer from limited solar spectral absorption and unsatisfactory water transport capabilities. Herein, we propose a hydrogel-based evaporator fabricated by incorporating a composite of graphene oxide/europium-doped tin selenide into a polyacrylamide (PAM) hydrogel. The incorporation of europium ions into SnSe, synergistically combined with graphene oxide, enables highly efficient absorption across the solar spectrum. The hydrophilic PAM hydrogel significantly enhances water transport within the evaporator while promoting multiple internal reflections of sunlight, thereby improving light trapping capability. The resulting system exhibits exceptional evaporation performance, achieving an evaporation rate of 2.25 kg m −2 h −1 and an efficiency of 98.9% under one-sun irradiation. It also demonstrates excellent salt rejection performance, exhibiting its superior performance in water treatment and seawater desalination. The strategy presented in this work, characterized by efficient solar absorption and remarkable water transport, paves the way for advancing sustainable freshwater production technologies. Download: Download high-res image (133KB) Download: Download full-size image
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JOURNAL OF MOLECULAR STRUCTURE
·
2025
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IF 4.7
Xiong Wang,Lingwei Zeng,Mengjia Chen,Zhouxi Li,Hu Zhou,Jianxian Zeng,Guoqing Liu,Tao Pang,Xiangcheng Wang,Yi Luo,Jianfeng Tang,Daqin Chen
Impurity doping is considered as a promising route to endow many functional materials with eminent properties, which may extend their applications in many research fields. As for the optical materials, great endeavors have been devoted to the fluorides over the past years, lanthanide orthovanadates receive less attention and focus. Herein, t-LaVO 4 :Ln 3+ (Ln = Eu, Dy, Sm, Tb) nanorods have been modified by the ZrOCl 2 addition, which are prepared through a hydrothermal synthesis technology. XRD, ICP, TEM, FT-IR and luminescence spectroscopy are employed to characterize the product. The morphology and luminescence performance of t-LaVO 4 :Ln 3+ nanorods could be modulated by deliberately control the ZrOCl 2 content. The average length and width of the nanorods decreases along with the increase of the ZrOCl 2 content. With regulating the content to 4 mol%, luminescence intensity are enhanced for several times and the decay lifetimes are prolonged to a certain extent. The growth mechanism and luminescence enhancement are discussed in detail. This report facilitates a novel approach for luminescence enhancement and widens the horizon for growth mechanism of LaVO 4 -based nanocrystals induced by impurity doping.
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ANALYTICAL SCIENCES
·
2023
·Vol. 39
·期 7
·1171-1178
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IF 1.6
Wang Kun,Gao Xue,Chen Jianfeng,Yang Xiaoyan
Abstract In this study, a sensitive photoelectrochemical immunosensor with dye-enhanced anodic photocurrent response was proposed for sensitive detection of α-fetoprotein (AFP). Specifically, europium-doped TiO 2 (Eu-TiO 2 ) was used as the photoelectrochemical functional material and coated onto indium tin oxide (ITO) electrode. Doxorubicin (DOX) as an excellent fluorescent dye was encapsulated in the hydrophobically modified alginate (HMA). Then the dye-loaded HMA was modified onto the surface of Eu-TiO 2 to further sensitize the photocurrent response. The results showed that the photoelectrical signal was enhanced and stabilized due to the effect of sensitization of DOX on Eu-TiO 2 material. The constructed PEC sensor revealed a good linear response to AFP antigen ranging from 0.5 to 100 ng/mL with a detection limit of 0.41 pg/mL. The clinical patient’s serum test results obtained from the proposed PEC immunosensor were consistent with those obtained from the commercial electrochemilunescence assay. The proposed PEC sensing method could be a promising analytical tool for the detection of AFP in clinical analysis. Graphical abstract
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xing Zhang,Xiurong Yang,Suhang Chen,Shuai Dong,Enzhou Liu,Hui Li,Haixia Ma,Kangzhen Xu
The rational regulation of electron transfer between Co-based catalysts and peroxymonosulfate (PMS) plays a key role in the photo-Fenton catalytic oxidation process. In this study, a novel Eu-doped ZnCo 2 O 4 composite was successfully prepared via a simple hydrothermal calcination method, and firstly used for PMS activation to degrade 1,1-diamino-2,2-dinitroethene (FOX-7). Among all samples, Eu 0.4 -ZnCo 2 O 4 exhibited remarkable PMS activation performance, which was about 5.67 times higher than that of undoped ZnCo 2 O 4 . The enhanced catalytic performance could be attributed to the generation of abundant oxygen vacancies (OVs), which greatly promoted the separation of carriers and accelerated the cycling of the Co 3+ /Co 2+ redox pairs. The corresponding Co 3+ /Co 2+ and oxygen defects/lattice oxygen (O Def /O Lat ) ratios regulated catalytic-activity relationship were successfully established by regression analysis. Radical quenching tests and electron paramagnetic resonance (EPR) revealed that non-radical pathway dominated the degradation process, and singlet oxygen ( 1 O 2 ) was the main active species. Importantly, theoretical calculations demonstrated that the synergy of doping and OVs could effectively improve adsorption energy and enhance electron transfer for promoting the activation of PMS. This study offers a deep insight into the catalytic reaction mechanism and provides a new strategy for developing heterogeneous photocatalysts in activating PMS for environmental remediation.
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NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 28
·13693-13699
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IF 3.925
Deyi Zhan,Abdul Saeed,Junyong He,Nanjing Zhao,Junfeng Wang,Weihong Xu,Jinhuai Liu
Recently, the development of fluorescent sensors to selectively and sensitively detect F− in drinking water has attracted great attention due to the serious harm caused by excessive F− to human bones, kidneys and even DNA. The advantage of a dual emission fluorescent sensor for its fluorescence color change in visualization is well known. In this work, we rationally designed a dual-emitting metal organic framework (MOF) (Eu/Sc)-EBTC, which showed ligand-based emission and Eu3+-based emission and exhibited high selectivity and sensitivity to F− (limit of detection = 16.4 ppb). The sensing mechanism was ascribed to the high affinity between F− and Eu3+ in (Eu/Sc)-EBTC, and was confirmed by PXRD patterns and X-ray photoelectron spectroscopy. Besides, a test strip was made successfully for the practical detection of F−. This study demonstrates the potential of a dual-emission fluorescent MOF sensor for practical applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Z.C. Yao,W.B. Dai,J. Luo,K. Nie,M. Xu
Several series of novel broad band white light emitting Bi/Tb/Eu tridoped in multiple lattice sites of single-phase Sr 3 YB 3 O 9 (SYBO) borate phosphors, which covered almost all visible range through mixing the separate blue, green and red emissions from dopants of Bi, Tb and Eu, respectively, were successfully obtained by using the facile and conventional solid-state reaction method under air condition. Rietveld refinements based on XRD data together with the combination match of charge and ion radius for dopants of Bi, Tb, Eu and lattice cations of Sr, Y and B show that Bi is more inclined to replace the Sr site while Tb/Eu are more likely to enter the Y site, respectively. Through spectrum analysis of photoluminescence excitation (PLE), PL and decay lifetime, the efficient energy transfer (ET) from the Bi to both Tb and Eu, and from Tb to Eu are all testified via the dipole-dipole interactions, indicating that the non-rare-earth activator Bi is acting both as the blue luminescence center and ET sensitizer, while the Tb contributes both as ET bridge and green luminescence center to better connect the Bi and Eu. The optimal tridoped white emission SYBO phosphor appears good thermal stability, which could continue to have its PL intensity above 75% at 150 °C as compared with the original room temperature PL intensity. Altogether, the single-component SYBO:Bi/Tb/Eu phosphor could be well served as potential white light phosphor for n -UV pumped w LED devices.
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高影响因子
OPTIK
·
2020
·
IF 2.187
Mingjing Bian,Hongyan Zhang,Jun Zhang,Zhijun Li
The influence of post-annealing on optical properties of Eu-doped ZnO (ZnO:Eu 3+ ) microsphere synthesized by hydrothermal method has been studied. The intrinsic deep defect emission of ZnO and the transition emission of both 5 D 0 → 7 F 1 and 5 D 0 → 7 F 2 related to Eu 3+ have been observed under excitation at 325 nm. The photoluminescence (PL) spectra reveal that ZnO annealed in N 2 is more favorable for Eu 3+ being doped into ZnO, which is helpful to greatly enhance the red light emission of ZnO:Eu 3+ . Alkaline conditions are more conducive to the formation of intrinsic deep defects in ZnO lattice, but they are not so conducive to the doping of Eu 3+ ions into ZnO lattice. From Gaussian deconvolution analysis of PL spectrum for ZnO:Eu 3+ , it can be seen that intrinsic defects of ZnO in N 2 atmosphere may efficiently assist energy transfer from ZnO host to Eu 3+ ions to enhance Eu 3+ intrinsic red light emission. There are blue light (446 nm), green light (525 nm) and stronger red light (618 nm) which are simultaneously obtained. This work could pave a way for high performance of white light emission application.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 14
·18741-18750
·
IF 2.478
Qin Ruifei,Liu Lina
Multifunctional Fe 3 O 4 /Eu(DBM) 3 phen/PVP ((DBM: dibenzoylmethane, phen: 1,10-phenanthroline, PVP: polyvinyl pyrrolidone) microfibers were constructed by simple electrospinning process. The structure and morphology of the microfibers were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images. The diameters of pure PVP microfibers and the microfibers doped only with Fe 3 O 4 nanoparticles (NPs) were uniformly distributed, with an average diameter of about 360 nm. When 3% Eu(DBM) 3 phen complex and Fe 3 O 4 NPs were both added to the precursor for electrospinning, the microfibers became very inhomogeneous in diameter. The photoluminescent properties of pure Eu(DBM) 3 phen complex and composite microfibers were also studied. The characteristic emission peaks of Eu 3+ appeared in the composite microfibers. The intensities of emission and excitation spectra gradually decrease with adding more Fe 3 O 4 NPs. The unit mass of the pure europium complex in some composite microfibers gave stronger luminescence than the pure europium complex. The fluorescence lifetime of 5 D 0 state in the composite microfibers is longer than that of pure europium complex. Additionally, the magnetic properties of Fe 3 O 4 NPs and the composite microfibers were investigated. The saturation magnetization of the composite microfibers was smaller than that of pure Fe 3 O 4 NPs.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Juncheng Zhou,Yuhao Chen,Shuang Xian,Yicun Liang,Guojia Huang,Lian Wang,Xiaozhan Yang
A novel europium metal-organic frameworks (Eu-MOFs), based on 1,3,5-benzotricarboxylic acid (H 3 BTC), 4,4′-azopyridine (4,4′-AZ) and N , N -dimethyllformamide (DMF), was synthesized by the solvothermal method . The crystal structure, thermal stability, morphology and luminescent properties are characterized by the X-ray diffraction (XRD), thermogravimetry (TG), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and optical spectroscopic techniques. The Eu-MOFs display a unique luminescence quenching effect to nitrobenzene (NB) and copper (Cu 2+ ) ions. The turn-off luminescence can be induced by 210 ppm NB or by 1000 μM Cu 2+ ions. Furthermore, the high sensitivities ( K SV = 0.039 ppm −1 for NB, and K SV =0.029 μM −1 for Cu 2+ ) and low detection limits (0.656 ppm for NB, and 1.395 μM for Cu 2+ ) are obtained. The sensing mechanisms are reasonably explained based on the electron and energy transfer. The experimental results show that the Eu-MOFs can be used as a potential sensing luminescence quenching probes for NB and Cu 2+ ions.
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