Catalysis Science & Technology
·
2025
·
IF 4.2
Dongfang Han,Li Niu,Yuangong Ma,Youlin Huang,Wen-Sheng Zhang
To utilize near-infrared (NIR) light within the solar energy spectrum, we have engineered an advanced composite of NaYF4:Yb3+,Tm3+@g-C3N4@WO3@MXene (denoted as NYT@g-C3N4@WO3@MXene) capable of absorbing NIR light to facilitate photocatalytic reactions. This environmentally benign system integrates semiconductor heterostructures (g-C3N4 and WO3) with upconversion nanoparticles (NaYF4:Yb3+,Tm3+, abbreviated as NYT) and Ti3C2 MXene nanosheets. Experimental validation demonstrated exceptional performance in antibiotic remediation, with the composite achieving 86.3% tetracycline decomposition over 12 hours under NIR irradiation through synergistic mechanisms, while also exhibiting good cycling stability. The enhanced photocatalytic activity arises from collaborative effects between upconversion luminescence, optimized charge transfer pathways within the heterojunction architecture, and the visible light absorption characteristics of MXene.
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高影响因子
Advanced Optical Materials
·
2026
·Vol. 14
·期 5
·e01740
·
IF 7.2
Um-e Kalsoom,Shakir Hussain Chaudhry,Jiaqing Guo,Abida Parveen,Yueshu Feng,Liwei Liu
The study reveals that these nanoparticles exhibit highly tunable photoluminescence (PL), with distinct blue, red, and near-infrared emissions that are highly sensitive to temperature changes. For the first time, the temperature-dependent characteristics of PL emissions for optical thermometry behavior among 300–500 K for particular nanoparticles are also investigated. The temperature-dependent fluorescence intensity ratio (FIR) technique, leveraging phonon-mediated apparent temperature-dependent coupling among Tm 3+ states, is employed to calculate the absolute sensitivity (S a ) and relative sensitivity (S r ) of particular nanoparticles. The results indicate high S a values of up to 0.0108 K −1 for sample A and 0.0017 K −1 for sample B across the given temperature range. Sample A exhibits a higher S r of 0.0122%K −1 at low temperatures, while decreasing to 0.0046%K −1 at higher temperatures, while sample B maintains a relatively consistent value over the same temperature range. These results highlight the potential of the synthesized nanoparticles as an effective optical thermometric probe. The Yb 3+ concentration directly modulates energy transfer efficiency and temperature sensitivity by influencing both the rate of energy transfer to Tm 3+ and the extent of nonradiative losses. Optimizing Yb 3+ content is thus crucial for achieving high sensitivity and stability in PL-based optical thermometry, positioning Yb 3+ /Tm 3+ co-doped K 0.3 Bi 0.7 F 2.4 nanoparticles as promising candidates for advanced noncontact temperature sensing applications.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2024
·Vol. 53
·期 5
·2514-2523
·
IF 2.2
Zhou Wei,Yang Jian,Jin Xiangliang
Upconversion (UC) nanomaterials are of interest to researchers because of their excellent photostability, effective quantum efficiency and optical temperature dependence. However, most UC nanomaterials are thermally quenched, which causes optical nanothermometers to be susceptible to their own thermal effects, reducing the accuracy of temperature measurements. In this paper, NaYF 4 :Yb 3+ /Ho 3+ /Tm 3+ /Gd 3+ nanorods with UC luminescence and resistance to thermal quenching are prepared through a simple hydrothermal method. The UC luminescence intensity of NaYF 4 :Yb 3+ /Ho 3+ /Tm 3+ /Gd 3+ nanorods is adjusted by doping with Tm 3+ ions. The luminescence intensity at each location shows different temperature dependence as the temperature increases. When the temperature reaches 573 K, the integrated luminescence intensity is three times that at 293 K. At the same time, the intensity at all temperature points in the range of 293–573 K is greater than the intensity at 293 K, which shows that the nanorods have excellent resistance to thermal quenching. In addition, the relative sensitivity ( S r ) of LIR( I 696 / I 476 ), LIR( I 696 / I 541 ), LIR( I 696 /I 646 ), LIR( I 696 / I 802 ), and LIR( I 541 / I 476 ) is investigated based on the luminescence intensity ratio (LIR) technique. The S r of LIR( I 696 / I 802 ) is found to have larger values in the low-temperature range, while S r of LIR( I 696 / I 476 ) has larger values in the high-temperature range. The use of LIR( I 696 / I 802 ) and LIR( I 696 / I 476 ) in separate temperature bands allows S r to reach 0.93–1.67 %K −1 in the range of 293–573 K, confirming that the nanorods have high S r over a wide temperature interval. This study indicates that the NaYF 4 :Yb 3+ /Ho 3+ /Tm 3+ /Gd 3+ nanorods are promising candidates for optical thermometers with high sensitivity, wide temperature range, and resistance to thermal quenching.
研究领域:
材料科学
·
光学
·
纳米技术
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高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Tianhui Wang,Yongjin Li,Tong Liu,Yuehong Peng,Zhaoyi Yin,Zhengwen Yang,Jianbei Qiu,Zhiguo Song
The upconversion of near-infrared (NIR) fluorescence, with a high tissue penetration depth, possesses a distinct advantage in biological temperature detection but is limited by the lack of rare earth-doped nanophosphors with intense and selective NIR UC emission. Here, we show that high-efficiency NIR temperature sensing can be achieved by appropriately doping Tm 3+ activators into a polarized layered host, utilizing the high environmental sensitivity of the 3 H 4 → 3 H 6 electric dipole transition (808 nm) of Tm 3+ . To confirm this concept, Yb 3+ /Tm 3+ codoped Bi 7 F 11 O 5 upconverting nanosheets were synthesized and characterized. Furthermore, the thermometric performance of the samples was analyzed based on the temperature-dependent fluorescence intensity ratio from the thermally coupled levels ( 3 F 3 / 3 H 4 ) of Tm 3+ . The results showed that, under 980 nm diode laser excitation, the prepared samples can produce a high NIR-to-visible UC emission ratio (I 800nm /I 475nm ) of over 2000 for Tm 3+ . The maximum sensitivity S a /S r was 1.4% K −1 /0.577 K −1 at 303 K based on the 3 F 3 and 3 H 4 levels, and the material exhibited a wide functional temperature range of 303–573 K. The results of our work not only improve the understanding of the optical properties of RE 3+ ions in layered materials but also show a potential application for physiological temperature sensing in biological tissues and cells.
研究领域:
光学材料
·
纳米光子学
·
温度传感
·
稀土发光
·
生物医学光学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jinyuan Zhang,Tong Liu,Tian Shi,Zhiyuan Cheng,Fuhua Gao,Da Cai,Shenghong Yang,Yueli zhang
Constructing comprehensive performance-enhanced heterostructured composite using the synergistic effect of complementary advantages between heterogeneous materials has always been challenging. In this work, highly stable β-NaYF 4 :Yb 3+ , Tm 3+ @BiOCl (NYF@BiOCl) heterostructured upconversion composites were successfully prepared using a two-step hydrothermal method. Compared to NYF/BiOCl mechanical mixtures, NYF@BiOCl with intimate interface show a higher photocatalytic degradation rate of rhodamine B (RhB) aqueous solutions, achieving 99.9% in 18 min and 98% in 2 h under simulated sunlight and near-infrared (NIR) light, respectively. The construction of heterostructures has a broad-spectrum response, which improves the utilization of sunlight and achieves efficient photocatalytic degradation of organic contaminants. Upconversion luminescence mechanism, spectral overlap, and Förster resonance energy transfer (FRET) explain the high photocatalytic activity of NYF@BiOCl. Meanwhile, NYF@BiOCl exhibits good universality to efficiently degrade other organic contaminants (methyl orange (MO), methylene blue (MB), bisphenol A (BPA), p-chlorophenol (4-CP)). This study demonstrates the potential of synergistic effects between heterogeneous materials. It Enhanced the photocatalytic activity of the NYF@BiOCl heterostructured composites driven by NIR light, providing a new strategy for energy-efficient and degradation of hazardous organic contaminants to alleviate environmental pollution.
研究领域:
环境科学
·
材料科学
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Wei Zhou,Jian Yang,Xiangliang Jin
This paper reports on microcrystals with deep tissue penetration depth, strong red light emission, and thermometric function. The red light emission of NaLuF 4 :20 % Er 3+ /1 % Tm 3+ /10 % Yb 3+ microcrystals is exceptionally strong, thanks to the introduction of Tm 3+ and Yb 3+ ions energy capture centers. In bioimaging, the 1532 nm laser exhibits deeper imaging depth due to weak photon scattering and autofluorescence. Furthermore, red light emission has the greatest tissue penetration depth in the visible region. The luminescence intensity and tissue penetration depth of both the excitation and emission light make them suitable for deep tissue imaging. We investigated temperature sensing performance of NaLuF 4 :20 % Er 3+ /1 % Tm 3+ /10 % Yb 3+ microcrystals, and found that the maximum relative sensitivity of LIR (I 521 /I 540 ) reaches 0.92 %K −1 . The microcrystals NaLuF 4 :20 % Er 3+ /1 % Tm 3+ /10 % Yb 3+ are anticipated to have application in deep tissue imaging and temperature sensing.
研究领域:
材料科学
·
生物医学工程
·
光学
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DOI
高影响因子
JOURNAL OF FLUORINE CHEMISTRY
·
2022
·
IF 2.226
Xuegang Zheng,Ying Chen,Shusheng Pan,Zhiyu Liu,Dekang Xu,Yueli Zhang,Hao Lin
In this paper, a range of Yb 3+ /Tm 3+ /Ho 3+ triple-doped NaYF 4 microcrystals (MCs) were successfully prepared by hydrothermal method and characterized by X-ray diffraction, which proved to be a hexagonal phase structure with uniformity. The morphology of NaYF 4 :20% Yb 3+ , 1% Ho 3+ MCs with different doping amounts of NaOH and citric acid were studied using scanning electron microscope, and the distribution of elements of this doping system was characterized by energy dispersive spectrometer. Upconversion luminescence (UCL) spectra of the MCs using a fluorescence spectrometer with 980 nm excitation were researched, and the results demonstrated that the tunable multi-color of the MCs can be achieved by varying the doping amount of different rare-earth ions. The UC mechanism of the MCs were systematically described. Li + doped the series MCs improved their UCL efficiency. By investigating the UCL the MCs of the Li + -doped system, the emission intensities of blue (450 nm, 475 nm), green (541 nm), and red (648 nm) light of the series MCs were increased by 2.75, 2.095, 2.65, and 2.87 times, which is of great significance for its application in light-emitting diodes and solar cells.
研究领域:
材料科学
·
光学
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Jiwei Liang,Huiping Gao,Mengji Yi,Wenjia Shi,Yuefeng Liu,Zhenlong Zhang,Yanli Mao
β-NaYF 4 :Yb 3+ , Tm 3+ @ TiO 2 core-shell upconversion nanoparticles (UCNPs) were synthesized and incorporated into the TiO 2 mesoporous layer of perovskite solar cells (PSCs). Changes of the upconversion spectra of the UCNPs suggest the existence of the electron injection from NaYF 4 :Yb 3+ , Tm 3+ to the conduction band (CB) of TiO 2 through the NaYF 4 :Yb 3+ , Tm 3+ /TiO 2 nano-heterojunctions. The core-shell UCNPs that incorporated into the TiO 2 mesoporous layer not only act as the upconversion centers to use the NIR light but also serve as the light scatter centers to enhance the light harvesting. When using mesoporous layer containing the core-shell UCNPs in PSCs, the efficiency of the best devices is 16.27%, which is about 16.38% higher than that of the devices without core-shell UCNPs (13.98%). The significant enhancement in the performance of the PSCs is attributed to light scattering, NIR light upconversion and electron injection from the UCNPs to the CB of TiO 2 .
研究领域:
材料科学
·
能源科学
·
纳米技术
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DOI
高影响因子
Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 37
·9770-9777
·
IF 5.256
Shaohua Fan,Guojun Gao,Dmitry Busko,Zhiquan Lin,Shikai Wang,Xue Wang,Shiyu Sun,Andrey Turshatov,Bryce S. Richards,Hongtao Sun,Lili Hu
Monodisperse β-NaYF4:Yb3+,Tm3+ (NYF) hexagonal microplates with efficient near-infrared (NIR)-to-NIR up-conversion (UC) developed via a new ion-exchange modified hydrothermal method are reported. Ion exchange modification (IEM) not only significantly increases the UC intensity by up to 1000 times and prolongs the emission lifetimes of Tm3+ and Yb3+, but also enables the monodisperse morphology and size of hexagonal microplates to be maintained. A high UC quantum efficiency (QE) of 3.1% is obtained for IEM β-NaYF4:20%Yb3+,1%Tm3+ when excited with 980 nm light at a power density of 10 W cm−2. The UC emission properties can be finely tailored by changing the NaF/NYF molar ratio (NYF represents lanthanide doped β-NaYF4) and the doping concentration of Tm3+. The two photon NIR UC emission centered at ∼803 nm (arising from Tm3+: 3H4 → 3H6) dominates the UC emission spectrum and high concentrations of Tm3+ favor NIR UC further. A proof-of-concept optical image of printed patterns is demonstrated to verify their applications in security. These results suggest the promising applications of the newly developed monodisperse β-NaYF4:Yb3+,Tm3+ hexagonal microplates in security, luminescent labels, solid-state lasers, amplifiers, and biomedicine.
研究领域:
材料科学
·
光子学
·
纳米技术
·
光学材料
·
发光学
·
稀土掺杂
·
生物医学工程
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DOI
高影响因子
Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 26
·6327-6335
·
IF 5.066
Weijing Yao,Qingyong Tian,Jun Liu,Zhaohui Wu,Shuyuan Cui,Jin Ding,Zhigao Dai,Wei Wu
Up-conversion materials can be applied in anti-counterfeit fields because of their high concealment and high up-conversion fluorescence efficiency. Herein, different lanthanide ions-doped β-NaYF4 up-conversion micro-particles (UCMPs) with uniform hexagonal morphology were synthesized on a large-scale (more than 0.5 g) via a facile hydrothermal method. It is very interesting to find out the fluorescence intensity and the eventual morphology of the UCMPs were highly dependent on the reaction conditions. Then, the optimal UCMPs with uniform morphology and strong fluorescence intensity were selected as promising candidates for preparing ink. Eventually, we successfully printed designable and multicolor fluorescent patterns on flexible substrates (common paper and polyethylene terephthalate, PET) using the as-prepared β-NaYF4:Yb3+,Tm3+/Er3+/Eu3+ UCMPs inks. Under ambient conditions, the printed patterns on conventional paper are invisible, while such printed patterns on PET are white. However, all the patterns could display blue, yellow-green and green fluorescence patterns under the irradiation of a 980 nm laser when using the β-NaYF4:Yb3+,Tm3+/Er3+/Eu3+ UCMPs inks. We envision that the UCMPs fluorescent inks-based flexible and rapid screen printing patterns have enormous potential for anti-counterfeit and security applications.
研究领域:
材料科学
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光学
·
纳米技术
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Xiaoyi Dong,Zhaoyi Yin,Liang Xu,Junhao Ma,Haomiao Cao,Yongjin Li,Qi Wang,Jin Han,Jianbei Qiu,Zhengwen Yang,Zhiguo Song
To achieve efficient degradation of organic pollutants, two critical objectives are enhancing photogenerated carrier separation and expanding the spectral response range. In this study, we synthesized atom-sharing Bi/Bi 4 O 5 Br 2 :Yb 3+ ,Tm 3+ (Bi/BYT) heterojunctions with surface plasmon resonance (SPR) effects and upconversion (UC) by employing self-sacrificial Bi 4 O 5 Br 2 :Yb 3+ ,Tm 3+ (BYT) fractions as a source of metallic Bi. Results revealed that the optimal Bi/BYT-2 catalyst exhibited the highest BPA degradation efficiency within 120 min, representing a significant 1.3-fold improvement over BYT alone. This outstanding catalytic performance can be attributed to the synergistic interplay between UC fluorescence, the unique SPR effect of Bi metal, and the atom-sharing heterojunction. These factors effectively broaden the spectral absorption range and significantly enhance the separation and utilization efficiency of photoinduced carriers. This study lays the groundwork for the development and design of novel atomic-level contact heterojunctions, offering insights into enhancing photocatalytic efficiency through plasmon resonance and UC fluorescence on non-precious metal surfaces.
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高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Huocheng Lv,Qian Wu,Laihui Luo,Weiping Li,Peng Du
To develop high-sensitivity optical thermometers, Yb3+/Tm3+-codoped La2Mo3O12 microparticles were synthesized by the sol–gel method. With the aid of in situ X-ray diffraction, the resultant microparticles are verified to possess negative thermal expansion (NTE) properties. When excited at 980 nm, the upconversion (UC) emission properties of final products are investigated, in which their strongest fluorescence intensities are reached at x = 0.07. Due to the coexistence of the increased energy transfer, cross-relaxation, and nonradiative relaxation procedures, the as-prepared microparticles present thermochromic UC emissions. Moreover, the intensity of UC emission arising from the 3F2,3 excited level at 583 K is 21 times higher than its starting value at 303 K, resulting in thermally enhanced luminescence in resultant microparticles. By employing the fluorescence intensity ratio technique to investigate the temperature-related intensities of UC emissions from 1G4 and 3F2,3 levels, the thermometric characterization of designed compounds is explored, where its highest absolute and relative sensitivities are 0.44 K–1 and 7.37% K–1, respectively. Furthermore, according to the temperature-related lifetimes of 1G4 and 3F2,3 levels of Tm3+, the relative sensitivities of developed microparticles are 0.36% and 0.23% K–1, respectively. Ultimately, visual optical thermometry is also realized by the studied samples owing to their thermochromic UC emissions. Our findings propose a facile strategy by employing NTE to regulate the UC emission behaviors of rare-earth ions so as to obtain high-sensitive luminescent materials.
研究领域:
材料科学
·
光学工程
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DOI
高影响因子
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