CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Qi Wang,Shaoxin Song,Ning Nie,Jinshan Tan,Wei Wang
The accurate and sensitive detection of hydrogen peroxide (H 2 O 2 ) is of practical significance in the fields of bioanalysis, medicine, environmental protection as well as food industry. Herein, we design and fabricate NaTb(SO 4 ) 2 nanoparticles (NPs) as novel fluorescent nanoprobes for H 2 O 2 detection. The design strategy is based on the fluorescence quenching occurred during the oxidation of Tb(III) to Tb(IV) upon H 2 O 2 addition. The sensing of NaTb(SO 4 ) 2 NPs to H 2 O 2 is in a “turn-off” mode, and the sensitivity is tunable by the pH due to the pH-dependence of the oxidizing ability of H 2 O 2 . Superior to most of the reported H 2 O 2 sensors, NaTb(SO 4 ) 2 NPs exhibit reliable stability in acidic environment and a more sensitive response to H 2 O 2 with a limit of detection (LOD) down to 0.047 μM at pH = 3.2. Based on its high sensitivity and reliable stability, the NaTb(SO 4 ) 2 NPs is anticipated to find potential applications in the field of biosensors.
研究领域:
生物分析
·
医学检测
·
环境科学
·
食品工业
✓ 已验证
DOI
高影响因子
Current Analytical Chemistry
·
2025
·Vol. 21
·期 1
·57-67
·
IF 1.7
Mengfei Yang,Jing Shi,Taiming Luo,Xiaozhan Yang
Aims By using terephthalic acid, 2, 5-furandicarboxylic acid, and terbium nitrate hexahydrate, a Tb-MOF with a core-shell structure was successfully designed and prepared. Methods A one-pot method was employed to design and synthesize core-shell Tb-MOF. The morphology, luminescence performance, and stability were well characterized. Results Tb-MOF demonstrated good water stability, acid and alkali resistance, and thermal stability. Tb-MOF was found to have high sensitivity to detect Cr3+, Bi3+, and acetone in an aqueous solution, and the LOD of Cr3+, Bi3+, and acetone were calculated to be 0.18 μM, 4.22 μM, and 0.26%, respectively. The sensing mechanism of Cr3+ and acetone was explained as energy-competitive absorption, and the sensing mechanism of Bi3+ was explained as ion replacement. Conclusion The prepared Tb-MOF can be developed as a multifunctional light-emitting sensor with high selectivity.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
ACS ES&T Water
·
2024
·
IF 4.8
Meiou Zhang,Bing Yan,Yong Li,Xianjun Xie
The excessive presence of ammonia and ammonium in groundwater poses potential hazards to human health and ecosystems; thus, accurate measurement of the ammonia nitrogen concentration is very important. Herein, a stable and highly luminescent decorated Tb-MOF was prepared by a hydrothermal and substitution reaction. Under the optimized detection conditions, the decorated Tb-MOF can detect ammonia nitrogen with an exceptional fluorescence enhancement in a wide detection range. The detection limit was determined to be 1.5514 × 10–2 μM in the lower concentration range from 0 to 0.0021 M. In addition, the as-prepared nanosensor also exhibited superior detection selectivity and anti-interference with respect to ammonia nitrogen, and the detection mechanism was investigated as the formation of an isoindole complex from dialdehyde with ammonia nitrogen to induce the energy transfer process. Furthermore, its practical ability was studied in groundwater with a decorated Tb-MOF. The detection in actual groundwater samples proves that this material can be used for practical applications. Our research provides a new method for visual, rapid, and in situ detection of ammonia nitrogen in groundwater.
研究领域:
环境科学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE COMMUNICATIONS
·
2015
·
IF 1.897
Lina Liu,Ruirui Sun,Yongsheng Zhang,Ruifei Qin,Dongmei Zhang,Chunjuan Tang,Linfeng Chen,Lishuang Liu
LaF 3 :Ce,Tb@SiO 2 core-shell nanostructures were synthesized using a new one-pot reverse microemulsion strategy. One-pot method facilitates the synthetic process of this kind of core-shell nanostructures. The crystalline phase, size, morphology, pore structure and luminescence properties were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), nitrogen physisorption isotherm, photoluminescence (PL) excitation and emission spectra. The results revealed that the core-shell nanostructures have an average diameter of about 27 nm and cores of about 3 nm, and that these nanostructures contain micropores with an average pore diameter of 0.43 nm. The characteristic emissions of Tb 3+ were observed under the excitation of Ce 3+ 4f–5d transition due to the energy transfer from Ce 3+ to Tb 3+ . LaF 3 :Ce,Tb@SiO 2 nanostructures can disperse well in water and the colloid can emit bright green light under ultraviolet (UV) irradiation.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Tianyun Du,Xiaojie Xue,Xiuxun Han
Rare earth activated color converted phosphors have been widely used in solid-state lighting and display fields. Developing phosphors with high luminous efficiency is of great significance for light-emitting devices. Concentration quenching is the main factor limiting the improvement of phosphor luminescence efficiency during increasing the activator doping level. In this study, a novel structural optimization strategy is developed to overcome the impact of concentration quenching. In Tb 3+ activated NaYSiO 4 (NYSO), large-size Gd 3+ ions are introduced to adjust the distance of rare earth ions and suppress the energy transfer between Tb 3+ luminescent centers. It is shown that at a critical Tb 3+ concentration, for which concentration quenching tends to occur in NaYSiO 4 :Tb 3+ , Gd 3+ incorporation successfully raises the internal quantum efficiency from 64.8 % for Tb 3+ -singly-doped NYSO up to 80.6 % for Gd 3+ /Tb 3+ co-doped one. The findings can offer a feasible pathway in promoting the luminescent properties of silicate phosphor hosts.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Chao Xia,Caiyan Yu,Mengmeng Cao,Jinfeng Xia,Danyu Jiang,Guohong Zhou,Dafeng Zhang,Huili Li
In this work, a new Eu and Tb co-doped luminescent compound based on MOF-5, [Zn 4 O(BDC) 3 ], (named as compound 1 ) was successfully synthesized. The structure and morphology characterizations demonstrate that the initial framework of MOF-5 is retained well after co-doping Eu and Tb. The systematic investigations of photoluminescence behaviors reveal that the heat-treated compound 1 (called as compound 1a ) can be utilized as a multi-channel readout luminescent thermometer in emission intensity ratio, decay time ratio, and luminescence color. It simultaneously exhibits the excellent repetitiveness and reversibility under high temperature region from 303 to 473 K. The relative sensitivity of 1.8%/K at 473 K is much higher than the best one of 1.19%/K previously reported for the mixed-lanthanide MOF Tb 0.8 Eu 0.2 BPDA. Until now, such a ratiometric luminescent thermometer with a high sensitivity at the temperature as high as 473 K has been rarely explored.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 43
·15312-15321
·
IF 6.4
Rui Rui Yang,Fangrui Cheng,Bang Lan
Trivalent rare earth Eu3+-doped luminescent materials have been used successfully for illumination and displays due to their narrow emission lines and extreme stability. Extending the excitation band to the UV, near UV and blue region via doping lanthanide ions as a sensitizer is highly desired for white LED application. However, the complex redox reaction and forward/backward energy-transfer pathway between the sensitizer ion and Eu3+ ion in the same lattice of the phosphor host limits the potential of this strategy. Herein, we present the luminescence properties of hierarchical porous composite materials with the formula Tb(C12H8N2)2(NO3)3@Ca0.9Eu0.1MoO4 and report how interfacial energy-transfer enhanced the absorption range of the Eu3+-doped material in the UV region. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images illustrated that the obtained Ca0.9Eu0.1MoO4 had a hierarchical porous structure, and the Tb(C12H8N2)2(NO3)3 was evenly filled inside the holes or the surface. The photoluminescence and decay data indicated the existence of interfacial forward energy transfer from Tb3+ → Eu3+. Furthermore, the thermal stability of the composited Tb(C12H8N2)2(NO3)3 was improved, indicating the potential of the composite materials for application in UV light-emitting diodes.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2024
·
IF 10.7
Qiulin Chen,Sheng Li,Xiaoyan Tu,Xinfeng Zhang
The pH of human sweat is highly related with a variety of diseases, whereas the monitoring of sweat pH still remains challenging for ordinary families. In this study, we developed a novel dual-emission Tb-MOF using DPA as the ligand and further designed and constructed a skin-attachable Tb-MOF ratio fluorescent sensor for real-time detection of human sweat pH. With the increased concentration of H + , the interaction of H + with carbonyl organic ligand leads to the collapse of the Tb-MOF crystal structure, resulting in the interruption of antenna effect, and correspondingly increasing the emission of the ligand at 380 nm and decreasing the emission of the central ion Tb 3+ at 544 nm. This Tb-MOF nanoprobe has a good linear response in the pH range of 4.12–7.05 (R 2 = 0.9914) with excellent anti-interference ability. Based on the merits of fast pH response and high sensitivity, the nanoprobe was further used to prepare flexible wearable sensor. The wearable sensor can detect pH in the linear range of 3.50–6.70, which covers the pH range of normal human sweat (4.50–6.50). Subsequently, the storage stability and detection accuracy of the sensors were evaluated. Finally, the sensor has been successfully applied for the detection of pH in actual sweat samples from 21 volunteer and the real-time monitoring of pH variation during movement processing. This skin-attachable Tb-MOF sensor, with the advantages of low cost, visible color change and long shelf-life, is appealing for sweat pH monitoring especially for ordinary families.
研究领域:
生物医学工程
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2023
·Vol. 52
·期 5
·3132-3145
·
IF 2.1
Xu Zhixuan,Xia Tianrui,Cheng Lichun,Xiang Ri,Yao Qingrong,Long Qianxin,Lu Zhao
Due to the frequent use of electronic equipment, electromagnetic radiation pollution has become a prominent problem. The use of microwave-absorbing materials can effectively solve this phenomenon. In this study, flaky Dy 2- x Co 17 Tb x alloy powders were prepared by vacuum smelting, and the microwave absorption performance was investigated by changing the Tb doping amount and matching thickness. The results show that the magnetic loss and dielectric loss are improved to a certain extent with the doping of Tb, and the absorption peak value moves to the low-frequency region. At the same time, the saturation magnetization (Ms) decreases with the increase in Tb doping. When x = 0.2 and the matching thickness is 1.6 mm, the minimum reflection loss (RL min ) value is −40.9 dB at 10.08 GHz, and the effective absorption bandwidth (EAB) is 1.6 GHz (9.28~10.88 GHz). In general, Dy 2- x Co 17 Tb x alloy powders have good microwave absorption performance in the X band.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2021
·
IF 5.876
Liu Yang,Yu-Long Liu,Xian-Xian Ji,Cheng-Guo Liu,Ying Fu,Fei Ye
Background A novel luminescent sensor with dual-emitting platforms, Tb@UiO-66 , was used for highly detecting Sm 3+ and teflubenzuron. Methods Tb@UiO-66 was synthesized on basis of the exchange of guest molecules, where Tb 3+ ions were encapsulated into the cages of UiO-66 . Significant finds The results of multiband fluorescence originated from the linker-to-cluster charge transfer and the characteristic emission of Tb III . Tb@UiO-66 displayed luminescence enhancements or quenches according to small molecules. Especially for Sm 3+ and teflubenzuron, the characteristic peaks of Tb@UiO-66 at 490, 545, 585, and 621 nm increased with the increasing of the concentration of the analytes, where Tb@UiO-66 exhibited the effect of luminescence enhancement. The detection limits for detecting Sm 3+ and teflubenzuron were 0.09 μM and 0.21 μM, and the changes of luminescence intensities could be observed by naked eyes under the UV light at 365 nm. Tb@UiO-66 could also be used to detect teflubenzuron in real water samples. Tb@UiO-66 could be reused for at least 5 cycles for the detection of Sm 3+ and teflubenzuron with the framework of Tb@UiO-66 uncollapsed. These results implied that the integration of Ln III luminescent materials and Zr-MOFs by doping method provided a new strategy for fabricating novel luminescent sensors for detecting polluting small molecules.
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
CRYSTENGCOMM
·
2018
·Vol. 20
·期 40
·6351-6357
·
IF 3.304
Kui-Suo Yang,Yi-Lian Li,Yang-Yang Ma,Li-Na Feng,An-Ping Wu,Yan Qiao,Jin-Rong Bao,Wen-Xian Li,Xiao-Wei Zhu,Ran-Bo Yu
A novel core–shell–shell SiO2@CePO4:Tb@SiO2 submicro-sphere was controllably synthesized by a bridging ligand organosilane HOOCC6H4N(CONH(CH2)3Si(OCH2CH3)3)2 (MABA-Si) connecting the silica core and rare earth ions. The as-synthesized samples were investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and infrared spectroscopy (IR). It is found that SiO2@CePO4:Tb@SiO2 has a ∼25 nm outermost shell, a ∼4 nm intermediate shell, and a ∼200 nm core. SiO2@CePO4:Tb@SiO2 exhibits stable photoluminescence properties in aqueous solution: its photoluminescence intensity was unquenched even after 15 days. The core–shell–shell submicro-spheres were found to have better photoluminescence than the core–shell submicro-spheres because the SiO2 shell protected the phosphor materials and then improved its photoluminescence intensity and biocompatibility. A formation mechanism of the core–shell–shell SiO2@CePO4:Tb@SiO2 submicro-spheres was proposed. Thus, the low-cost preparation of the core–shell–shell SiO2@CePO4:Tb@SiO2 submicro-spheres could be rationally achieved using SiO2.
研究领域:
材料科学
·
纳米技术
·
光学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Bingxin Xie,Lei Lei,Jinghua Xu,Shiqing Xu
An pH-sensitive citric acid coated Ce/Tb:KGd 2 F 7 nanocrystals with a broad detection range from 3 to 10 is established. Under the 254 nm excitation, the Tb 3+ emission intensity originated from Ce 3+ → Gd 3+ →Tb 3+ decreases gradually with the increase of pH, while its intensity almost keeps unchanged in pH 3 to 6 and increases in pH 6 to 10 under the 311 nm excitation, which activates the ratiometric pH sensing with high sensitivity.
研究领域:
材料科学
·
纳米技术
·
传感器
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）