DALTON TRANSACTIONS
·
2020
·Vol. 50
·期 4
·1300-1306
·
IF 4.174
Xiao-Yang Zhao,Hui Yang,Wen-Yuan Zhao,Jia Wang,Qi-Shan Yang
Bacillus anthracis is an extremely dangerous bacterium that is associated with high morbidity and mortality. 2,6-Pyridine dicarboxylic acid (DPA) is a major biomarker of Bacillus anthracis, and it is of great significance to be able to detect DPA in a rapid, efficient, and sensitive way. Herein, a 3D network metal–organic framework (Tb-MOF) with excellent thermal and water stability was synthesized. Tb-MOF could be used to selectively detect DPA via green fluorescence recovery with a fluorescence intensity enhancement factor of 103. In addition, due to the high detection sensitivity (a detection limit of 2.4 μM) and excellent anti-interference abilities, Tb-MOF was less affected by environmental factors when compared with a “turn-off”-response luminescence sensor; it can be employed as a promising “turn-on” luminescence sensor for DPA in the future. Finally, quantum calculations showed that a large energy difference appeared between the 5D4 level of Tb3+ and the first excited triplet energy level of H2-DHBDC2−, which was the reason that the complex did not show characteristic Tb3+ emission.
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Z.H. Xu,C. Wang,X.Z. Xiong,W.B. Dai
Borate-based phosphors, as a critical class of luminescent materials, have garnered significant attention due to their stable crystal structures, wide bandgaps, excellent thermal stability, and robust spectral tunability, making them essential components in white light-emitting diodes ( w LEDs) technologies. In this work, a high-symmetry Ba 3 Y 2 B 6 O 15 (BYB) phosphor co-doped with Bi 3+ , Tb 3+ , Eu 3+ , and Lu 3+ was synthesized via a multi-step sol-gel method. Different photoluminescence (PL) behaviors of Bi 3+ , Tb 3+ and Eu 3+ in BYB were systematically revealed. By modulating the PL spectrum via energy transfer (ET) from Bi → Tb → Eu, ‘cool’ white-light emission was achieved. A strategy of replacing Y 3+ with Lu 3+ was adopted to adjust the crystal field splitting and symmetry. This modification broadens the blue light coverage range in Bi 3+ PL, increases the hypersensitive transition of Eu 3+ ( 5 D 0 → 7 F 2 ), increase the intensity of red emission. They achieved their optimal balance ultimately. The improved structural compactness and rigidity reduced electron-phonon coupling effects, endowing the phosphor with superior chemical/thermal stability. Finally, a high-performance phosphor-converted w LED (pc- w LED) device with chromaticity coordinates of (0.361, 0.358), a luminous efficacy (LE) of 95.2 lm/W, was fabricated by integrating the optimized BYB: Bi/Tb/Eu/Lu phosphor with a UV LED chip using remote ‘cap’ packaging, demonstrating exceptional performance.
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 52
·期 3
·644-651
·
IF 4.569
Xiao Lian,Lele Cheng,Jingrui Shan,Mingzai Wu,Fangcai Zheng,Helin Niu
The identification of drugs or biomolecules for public health monitoring requires facile analytical technologies with excellent sensitivity, portability and reliability. In the past decades, different sensing materials have inspired the development of various bioanalytical strategies. However, sensing platforms based on powder materials are not suitable for medical diagnosis, which limits further exploration and application of biosensors. Herein, a point-of-care testing (POCT) membrane was designed from an energy competition mechanism and achieved the detection of the nonsteroidal antiphlogistic diclofenac, and exhibited remarkable testing efficacy at the ppb level. The mixed matrix membrane (MMM) sensor consists of electrospun polyacrylonitrile nanofibers and luminescent Tb-MOFs and possess the advantages of high stability, outstanding anti-interference ability, efficient detection (LOD = 98.5 ppb) and easy visual recognition. Furthermore, this MMM sensor exhibits excellent recyclability in serum, which is beneficial for developing a portable and convenient device to distinguish diclofenac in practical sensing applications. Meanwhile, the feasibility and mechanism of this recyclable sensor were verified by theory and experiments, indicating that it is a promising device for diclofenac detection in biological environments to evaluate the toxic effect caused by the accumulation of nonsteroidal drugs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Huijun Li,Xin Xu,Yonghui Liu,Yanan Hao,Zhouqing Xu
Developing multifunctional luminescent switches for detecting various poisons are urgent given the continuous deterioration of the environment. Herein, a new porous fluorescent metal–organic framework [Tb 2 (TPTC)(DMA) 4 (NO 3 ) 2 ] n (HPU-25) was initially designed. Then, fluorophore molecule tris(2,2′-bipyridine) dichlororuthenium(II) hexahydrate (Ru(bpy) 3 2+ ) was loaded onto HPU-25 by a simple post-synthesis strategy to prepare a new ratio fluorescence sensor Ru(II)@HPU-25 . As a sensor, it can detect 2,6-pyridinedicarboxylic acid (DPA) content in real-time, with high sensitivity and selectivity, without being disturbed by probe concentration and environment. Evident changes in fluorescence color and intensity are observed in distinguishing DPA contents. In addition, after detecting DPA, it can be used for consecutive visual detection of dichromate anion (Cr 2 O 7 2− ) in water. This multifunctional fluorescence sensor could make up for the defects of single fluorescence and single function of the traditional fluorescence sensor by using the dual strategies of ratio sensing and cascade sensing. Interestingly, DPA and Cr 2 O 7 2− in samples can be visually detected rapidly in real-time through the chroma acquisition APP on smartphone. More importantly, we also designed the combination of two logic gate operations for sensing the two targets. In the poison detection in daily life, these intelligent applications of fluorescence sensors have a broad development space.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Yajing Cai,Guojie Zhang,Jun Liu,Yunfei Zhang,Tianshan Li,Xiaodi Zhang,Ying Wang,Yuqiong Zhao,Guoqiang Li
Dry reforming of methane (DRM) is an effective method for achieving carbon reduction and carbon neutrality by directly converting two greenhouse gases , CH 4 and CO 2 , into value-added products. However, catalysts used in this process are prone to metal sintering and carbon deposition , which are major obstacles. Thus, the design of high-performance catalysts is crucial for the success of dry reforming technology. In this paper, a series of Co-based catalysts modified with different rare earth metals (Y, Tb, Gd) and γ-Al 2 O 3 as the support were prepared using the conventional co-impregnation method. The effects of the introduction of rare earth metals additives on the activity and resistance to carbon build-up of the catalysts were investigated. The catalysts were analyzed using various characterization techniques. The results showed that Y and Tb as additives could effectively improve the activity and stability of the catalyst. However, the Gd modified Co-based catalyst had a large specific surface area but was less favorable for the DRM reaction. The best performance catalyst was achieved with the 10Co–5Y/γ-Al 2 O 3 under 750 °C with CH 4 and CO 2 conversions of 91.79% and 98.33%, respectively. This is mainly due to the fact that the introduction of Y enhances the electron transfer between Co and metal oxides , generating more oxygen vacancies and base vacancies on the surface, thus enhancing the adsorption and activation of CO 2 . The 10Co–5Y/γ-Al 2 O 3 catalyst demonstrated excellent DRM performance even after 20 h at 750 °C. Moreover, we proposed a hypothesis regarding the mechanism of resistance to carbon build-up. This study provides a reasonable idea to design Co-based catalysts with resistance to sintering and carbon accumulation to improve the performance of reforming catalysts.
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Ciyang Zhang,Keren Lu,Linrui Li,Wu Lei,Mingzhu Xia,Fengyun Wang
Oxytetracycline hydrochloride (OTC) is a commonly used over-the-counter antibiotic, valued for its potent antibacterial properties. However, the inappropriate and excessive use of OTC can result in the accumulation of the drug in both the environment and human body, causing significant harm to ecosystems and human health. Therefore, the development of a fast and sensitive method for detecting OTC is of great significance. Lanthanide metal–organic frameworks (LnMOFs) can effectively excite lanthanide metals to emit long-lifetime, narrow and stable fluorescence based on the antenna effect, but their application in fluorescence sensing is rarely reported. In this work, a strongly fluorescent material Tb-MOF was synthesized by a facile solvothermal method using 1,2,4,5-phenylenetetracarboxylic acid (H 4 btec) and 1,10-phenanthroline (1,10-phen) as organic ligands and lanthanide metal Tb as the luminescent center. Tb-MOF is a stable material in water and shows excellent linearity with OTC in the concentration range of 0 ∼ 70 μM, with low detection limit (0.12 μM) and luminescence color transition from bright green to dark green during the detection process. X-ray diffraction, UV–vis absorption and fluorescence lifetime analyses revealed that the fluorescence quenching of Tb-MOF by OTC is caused by the inner filter effect in static quenching. Test strips for OTC detection were successfully prepared using Tb-MOF. These strips are not only low cost and easy to prepare but can also be used as portable sensing devices that can be easily distinguished by the naked eye during OTC testing. This study not only presents a fluorescent probe for the detection of OTC in water but also offers a practical method for converting fluorescent luminescent materials into functional devices for OTC detection.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LUMINESCENCE
·
2021
·Vol. 36
·期 8
·1901-1909
·
IF 2.464
Yan-hong Liu,Xiao-guang Ma,Li-ye Zhu,Meng Li,Xiao-xia Ren,Man Zhang
The SiO 2 @SiO 2 :Tb(1,2-BDC) 3 phen microspheres with monodispersed core-shell structure, are kind of fluorescent particles, which are prepared by a seeded growth method under the catalysis of glacial acetic acid (1,2-BDC, 1,2-benzenedicarboxylic acid; phen, 1,10-phenanthroline). Firstly, silica seed was fabricated by the hydrolysis of ethyl orthosilicate, and the Tb(1,2-BDC) 3 phen was prepared by using 1,2-BDC and phen. Then, a thin mesoporous silica shell doped with Tb(1,2-BDC) 3 phen was grown on the prepared monodisperse silica colloids. The prepared phosphor was analyzed by Fourier-transform infrared spectroscopy, X-ray diffraction analysis, scanning electron microscopy, transmission electron microscopy, thermogravimetric and fluorescence spectroscopy. The experimental results showed that the diameter of the SiO 2 @SiO 2 :Tb((1,2-BDC) 3 phen microsphere was about 200 nm with a typical core-shell structure, among which the diameter of the silica core was 180 nm, and that of the mesoporous silicon shell doped with terbium complex was about 10 nm. The fluorescence intensity of SiO 2 @SiO 2 :Tb((1,2-BDC) 3 phen microsphere is nearly three times higher than that of Tb((1,2-BDC) 3 phen complexes. The prepared microspheres could be widely used in bio-imaging, optoelectronic appliances and medical diagnosis.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2019
·
IF 5.589
Zeyu Wang,Cong Chen,Huan Liu,Dzmitry Hrynshpan,Tatsiana Savitskaya,Jianmeng Chen,Jun Chen
The microbial reduction of nitrate in the presence of nanoscale zero-valent iron (nZVI) was evaluated to assess the feasibility of employing nZVI for biological denitrification treatment. The effect of modified nZVI on the growth, metabolism, and denitrification performance of Alcaligenes sp. TB under aerobic conditions was studied. Results showed that Alcaligenes sp. TB with nZVI/Pd had 31.5% increase in nitrate removal and 18.1% decrease in nitrite accumulation within 28 h. nZVI/Pd exhibited less inhibition on the cell growth (OD 600 = 0.725), NADH/NAD + ratio (86% of control), and electron transfer system activity (68.5% of control). In addition, nZVI/Pd decreased the membrane fluidity by increasing the trans/cis isomerization ratio (317.7% of control) to enhance the resistance of nZVI. This study underlines the effects of nZVI/Pd on membrane susceptibility via membrane fatty acid transformation during denitrification and suggests the influence of engineered nanomaterials on denitrification.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Renjie Jiang,Jie Chen,Mingqin Li,Yanna Tian,Shiji Shen,Xuan Yang,Yanru Tang,Yan Sun,Hui Lin,Shengming Zhou
Ce: YAG- Al 2 O 3 composite ceramics are regarded as highly promising materials for laser illumination application due to their high luminous efficacy and thermal stability. Nevertheless, the Ce: YAG ceramics exhibit limited color rendering index (CRI) for indoor lighting due to their low red emission component. In this study, we synthesized high-performance Ce, Mn-doped (Y, Tb) 3 Al 5 O 12 –Al 2 O 3 composite ceramic phosphors via a vacuum solid-state sintering method. It was observed that the introduction of Mn 2+ ions created a second luminescence center with an emission peak centered at 580 nm. As the Mn 2+ concentration increased, the emission peak redshifted from 580 nm to 591 nm, leading to a significant enhancement in the color rendering index of the ceramics. The cross-energy transfer between Tb 3+ and Mn 2+ , Ce 3+ ions augmented the absorption and conversion of blue light by the ceramics, thereby reducing the correlated color temperature greatly. Based on these findings, ceramics with a Ce 3+ concentration of 3 at% and a Mn 2+ concentration of 4 at% exhibited the highest CRI values (81.3 and 75.6) under both laser excitation and LED excitation, establishing them as strong candidates for achieving high color rendering in white LED/LD illumination applications.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Qingtong Cao,Bing Wang,Guomin Li,Xinzhong Wang,Jian Zhang,Hongxin Lv
Due to the high biological toxicity and the propensity to induce antibiotic resistance, the treatment of antibiotic wastewater has consistently posed a formidable challenge. The semiconductor photocatalysts can efficiently and completely remove antibiotics from the wastewater to repair the water environment. Therefore, a novel ZnIn 2 S 4 /Tb-g-C 3 N 4 (ZIS/TCN) photocatalyst was successfully synthesized in this paper and its ability to efficiently degrade antibiotics has been verified. The optimized 150ZIS/TCN photocatalyst showed excellent photocatalytic performance and stablility toward the degradation of tetracycline (TC) and tylosin (TYL) under sunlight simulated with a xenon lamp. Compared with pristine g-C 3 N 4 and ZnIn 2 S 4 , the 150ZIS/TCN exhibited superior degradation performance for TC (TYL)，about 3.2 (2.1) and 1.8 (1.5) times higher than them. Based on density functional theory (DFT) calculations and experimental characterization test results, it was confirmed that the Tb doping effectively regulates the intrinsic electric field and visible light absorption capacity. This study unveils the degradation mechanism of ZIS/TCN photocatalysis and provides an effective pathway for enhancing photocatalytic degradation through rare earth doping.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Yujie Chen,Zhaode Mu,Jianli Zuo,Min Qing,Jing Zhou,Lijuan Bai
A novel aptasensor for the detection of kanamycin (KNM) was developed based on dual signal amplification through nanomaterials and DNA rolling machines. Firstly, a composite consisting of the covalent organic framework (COF), ketjen black (KB) and toluidine blue (Tb), was synthesized for signal generation. Tb molecules were loaded into the composite and combined with AuNPs to serve as tracer label. Secondly, the wDNA-loaded Fe 3 O 4 magnetic beads (wDNA@MBs) as the DNA walking legs, with cleavage by Mg 2+ -driven DNAzyme, the DNA walking legs can move along the sDNA-decorated MBs surface, converting the target KNM into numerous output DNA strand, achieving sensitive amplification. With a low detection limit of 0.66 fM and a wide linear dynamic range from 10 fM to 100 nM, this aptasensor showed good results in the detection of KNM in real samples. Therefore, we envision it can provide a useful method for KNM detection in actual samples.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Zhi Wang,Dongquan Leng,Yan Zhang,Tingting Wu,Hongmin Ma,Xiang Ren,Zhen Yu,Qin Wei
Aflatoxin B1 (AFB1) poses severe threats to human health even at trace levels, necessitating the development of rapid and sensitive detection methods. This work presents an innovative self-powered photoelectrochemical aptasensor for ultrasensitive AFB1 monitoring. Specifically, zinc phthalocyanine-sensitized MgIn 2 S 4 as a high-performance photoanode, where the sensitization narrows bandgap and extends light absorption, generating enhanced photocurrent for biological detection. Furthermore, Au@CuGaO 2 as a stable photocathode that provides abundant biomolecule binding sites while circumventing the false-positive issues inherent in conventional anodic sensing platforms. Notably, SiO 2 @Tb-MOF as a dual-function quencher that simultaneously competes for visible light excitation and creates steric hindrance to block electron donor access, achieving significant signal amplification. The synergistic effects of these components yield exceptional analytical performance, including an ultra-wide linear range (0.01 pg/mL to 100 ng/mL) and a low detection limit (0.0032 pg/mL). The satisfactory anti-interference, reproducibility and stability provide a solid foundation for the application of this sensing platform.
✓ 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）