International Journal of Applied Ceramic Technology
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2025
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IF 2.3
Zhenlin Wang,Anze Shui,Hulei Yu,Mei Cai
Photocatalysis presents a promising solution for environmental remediation, though conventional photocatalysts remain constrained to the ultraviolet and partially visible regions of the solar spectrum. To address this limitation, we developed a NaYF 4 :Yb,Er/BiOBr (N/B) composite photocatalyst, leveraging upconversion luminescence to convert near-infrared photons into visible light while utilizing BiOBr's narrow bandgap for enhanced visible-light absorption. The composite photocatalyst was fabricated via a two-step solvothermal approach and evaluated for the degradation of methyl orange (MO). Remarkably, the N/B-120°C sample demonstrated superior photocatalytic activity, achieving degradation rates 2.4- and 5.4-fold higher than those of pristine BiOBr and commercial TiO 2 (P25), respectively. This enhanced performance is attributed to synergistic effects including an increased specific surface area (23.96 m 2 /g for N/B-120°C vs. 16.28 m 2 /g for BiOBr), reduced charge transfer resistance (as evidenced by electrochemical impedance spectroscopy (EIS) Nyquist plots), elevated oxygen vacancy concentration (as verified by x-ray photoelectron spectroscopy [XPS]), and extended solar spectral utilization range (400–980 nm). This work presents a viable strategy to improve the efficiency of photocatalysis.
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高影响因子
JOURNAL OF CLUSTER SCIENCE
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2020
·Vol. 32
·期 6
·1683-1691
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IF 1.731
Liang Xuhua,Fan Jun,Zhao Yanyan,Jin Ruyi
A core–shell-structured composite by combining mesoporous silica with upconversion luminescence (UCL) property had considerable application potentials in the fields of drug delivery, disease diagnosis, and therapy. In this paper, a monodisperse, core–shell-structured NaYF 4 :Yb,Er@ n SiO 2 @ m SiO 2 nanoparticle (UCNP@MSNs-FA) with excellent UCL property was successfully fabricated by a facile two-step sol–gel strategy and by modifying the surface with folic acid (FA) to strengthen its tumor-targeting performance. The properties of the composite were studied extensively, which indicated that UCNP@MSNs-FA possessed good dispersion, typical core–shell-structured with high specific surface area (132.775 m 2 /g), and excellent UCL property that improve cell imaging and drug delivery. The viability of L929 cells and hemolysis assay demonstrated the good biocompatibility of the composite. By using doxorubicin hydrochloride (DOX) as a model drug, the drug loading content and encapsulation efficiency of UCNP@MSNs-FA could reach as high as 11.2% and 37.3%, respectively, which proved the effectiveness to load anticancer drugs. In addition, the DOX-UCNP@MSNs-FA system exhibited sustained drug release and strong pH-dependent performance, in which the drug release would be accelerated at the slightly acidic microenvironment in the tumor. Moreover, experimental results indicated that DOX-UCNP@MSNs-FA exhibited specific cytotoxicity to KB cells but weakened toxicity to FR-negative cells. Therefore, the as-prepared UCNP@MSNs-FA could be used potential for simultaneous targeted anti-cancer drug delivery and cell imaging and enhance the therapeutic efficacy against FR-positive tumor cells.
研究领域:
纳米医学
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生物材料
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癌症治疗
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高影响因子
JOURNAL OF LUMINESCENCE
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2025
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IF 3.6
Guangliang Lu,Yiping Zhang,Jianlian Song,Yuhan Jing,Xingyu Li,Rao Qin,Da Biao Zhai,Jiangang Jiang,Yiping Wang,He Wang
Traditional methods for latent fingerprint (LFP) detection often suffer from insufficient contrast and background interference, limiting their effectiveness in forensic applications, particularly in complex environments. This study introduces an innovative approach that combines Fe 3+ -doped NaYF 4 :Yb, Er upconversion nanoparticles (UCNPs) with digital image processing technology. By optimizing the Fe 3+ doping concentration (15 % mmol) and synthesis temperature (220 °C), the red emission intensity at 655 nm was enhanced by 13.96 times compared to undoped samples. The amplified red emission originates from energy transfer of | 2 F 7/2 , 4 T 1g ⟩ (Yb 3+ -Fe 3+ dimer) to 4 F 9/2 (Er 3+ ) states, coupled with crystalline field symmetry distortion induced by Fe 3+ codoping. Dynamic studies of 4 S 3/2 and 4 F 9/2 states under 980 nm pulsed laser excitation, alongside diffuse reflectance analysis, corroborate the proposed upconversion mechanism. Additionally, The optimized UCNPs demonstrated high biocompatibility and stability, achieving LFP visualization with contrast ratios up to 85.03 % and structural similarity scores exceeding 91.58 % via MATLAB-based digital image processing, a significant improvement over conventional methods. This work establishes a robust, non-toxic LFP detection system with potential applications in forensic science.
研究领域:
材料科学
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法医学
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光学
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高影响因子
NANOTECHNOLOGY
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2020
·Vol. 31
·期 14
·145504
·
IF 3.551
Zixiao Zhao,Jiawei Shen,Min Wang
Numerous investigations have been devoted to visualizing latent fingerprints (LFPs) for personal identification in forensic investigation and age estimation. While simultaneous detection of chemicals in fingerprint residues has yet to be explored. Herein, fluorescent NaYF4:Yb/Tm up-conversion nanoparticles (UCNPs), which can emit blue fluorescence upon 980 nm near-infrared irradiation, have been employed in the imaging of LFPs with high contrast and high sensitivity. The furrows and ridges which provide detailed information of LFP have been displayed clearly by Tm-doped UCNPs. Meanwhile, the quantitation of nicotine residue in LFPs has been achieved based on the blue fluorescence absorbed by I2-nicotine complex, and the data was analyzed by MATLAB with modified OPTA algorithm. It was proved that the established strategy was specific, sensitive, reliable and practical toward nicotine residue in LFPs with a detection limit of 0.05 μg.
研究领域:
法医学
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材料科学
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化学分析
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 13.2
Qianqian Song,Hao Chen,Kanghui Zheng,Yueling Lai,Zhongshan Li,Xin Yang,Ruilin Wang,Yufeng Zhou
Lanthanide-doped upconversion nanoparticles (UCNPs) are extensively used in spectral conversion layers of photovoltaic (PV) devices to capture near-infrared (NIR) light. However, surface quenching effects and low upconversion quantum yield (UC QY) of UCNPs limit their utilizations in PV devices. In this work, novel multishell NaYF 4 @NaYF 4 : Yb, Er@NaYF 4 (CSS) UCNPs have been synthesized via thermal decomposition method. The CSS UCNPs exhibit enhanced UC emission intensity by 36.33 times and UC QY by 38 times with respect to those of NaYF 4 : Yb, Er UCNPs, with a significant increase in fluorescence lifetime. After incorporating CSS UCNPs with Cadmium Telluride (CdTe) solar cells, the device achieved a power conversion efficiency (PCE) of 16.02% under AM 1.5G illumination, a 5.9% increase compared to the bare CdTe solar cell, and exhibited more than a 76-fold enhancement in efficiency under 980 nm excitation. This study demonstrates the synergistic effects of the multilayer shell structural UCNPs with enhanced luminescence and engineered interfaces between CdTe and back electrode, offering a scalable strategy for efficient infrared-responsive photovoltaic devices.
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Materials Express
·
2018
·Vol. 8
·期 2
·141-148
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IF 1.597
Tan Haihu,Xie Shaowen,Li Na,Tong Chao,Xu Lijian,Xu Jianxiong,Zhang Changfan
Luminescent polymer composite films were prepared by aqueous solution casting method employing poly(vinyl alcohol) (PVA) as a matrix polymer and NaYF4:Yb, Er up-conversion phosphors (UCPs) as the filler. A series of luminescent UCP/PVA composite films were obtained by varying
the amount of the UCP filler. The effects of UCP incorporation on the structure, morphology, thermal stability and optical properties were also examined. The well-dispersed UCPs in the polymer matrix enhanced the thermal stability of composite films due to hydrogen bonding between the PVA
and UCPs. Besides, the incorporation of UCPs did not greatly decrease the transparency of films but imparted fluorescent properties to the polymer matrix. The fabricated UCP/PVA composite films exhibited strong up-conversion photoluminescence upon the 980 nm laser excitation. The UCP/PVA composite
fluorescent films may have promising application in anti-counterfeiting packaging and in other optics related fields.
研究领域:
材料科学
·
光学
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高影响因子
CATALYSIS TODAY
·
2022
·
IF 6.562
Yunfei Ma,Wenhui Yue,Zehong Xu,Ziwei Ye,Jinlong Zhang
Composite nanoparticles consisting upconversion nanoparticles (β-NaYF 4 :Yb/Er) and nitrogen doped TiO 2 nanoparticles were constructed via a chemical assembly method. Efficient energy transfer was enabled since the upconverted energy matched up with the band gap of N-TiO 2 . This enables the resulting composite nanoparticles to possess excellent Rhodamine B (RhB) degradation activity under near infrared (NIR) light irradiation.
研究领域:
材料科学
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环境科学
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纳米技术
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DOI
高影响因子
ChemPhotoChem
·
2017
·Vol. 1
·期 8
·369-375
·
IF 0
Xuesong Zhai,Ying Wang,Xiaojuan Liu,Shihu Liu,Pengpeng Lei,Shuang Yao,Shuyan Song,Liang Zhou,Jing Feng,Hongjie Zhang
Graphical It′s all under control : Ultrasmall NaYF 4 :Yb,Er upconversion nanocrystals have been prepared by the simultaneous addition of two methanolic solutions of NH 4 F and NaOH into a rare-earth-salt precursor solution. A large number of hexagonal-phase seeds are quickly formed as a result of the low energy barrier, resulting in an ultrasmall particle size. Precise control over the size and crystallographic phase of nanocrystals allows the manipulation of their properties and applications as desired. Hexagonal-phase NaYF 4 (β-NaYF 4 ) upconversion nanocrystals with efficient luminescence are quite desirable for bio-applications, but synthetic control over the nanocrystallite size remains challenging. Herein we verify experimentally that control of the hexagonal-phase nucleation is crucial for controlling the final particle size and the number of hexagonal-phase seeds strongly depends on the actual F(Na):Y ratio. A negligible number of hexagonal-phase seeds were formed at low ratio whereas the high ratio yields a very large number of seeds. We also identify that the actual F(Na):Y ratio is more likely related to the different methods employed for the addition of NH 4 F and NaOH rather than its initial feeding ratio. By taking advantage of this dependence and varying the reaction conditions (temperature and time), β-NaYF 4 :Yb,Er nanocrystals with a size smaller than 6 nm can be synthesized. Theoretical modeling shows a good agreement with the experimental results.
研究领域:
材料科学
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纳米技术
·
化学工程
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TALANTA
·
2016
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IF 4.035
Yueli Hu,Boyue Wu,Qing Jin,Xueyuan Wang,Yan Li,Yuxiu Sun,Jianzhong Huo,Xiaojun Zhao
5 nm intense green emission NaYF 4 :Yb/Er upconversion nanoparticles (UCNPs) with pure β phase was synthesized with a simple “green” strategy for the first time. Traditional organic solvothermal method is often applied to prepare the high-quality and uniform UCNPs, but the preparation of lanthanide-oleate complexes is laborious as heating and multistep post-treatment for purification are often required. The water-alcohols solvothermal method is environmentally friendly, but the fabricated UCNPs have big size, poor biocompatibility and high cytotoxicity, which limited their application for cell imaging. Herein, NaYF 4 :Yb/Er UCNPs were prepared with rare-earth nitrates RE(NO 3 ) 3 (RE=Y 0.80 Yb 0.18 Er 0.02 ) as precursors and diethylene glycol (DEG)/ethylene glycol (EG)/water as the solvent. A facile green solvothermal method with the temperature being controlled at 300 °C was developed. The as-prepared NaYF 4 :Yb/Er UCNPs were characterized and were found to have enhanced UC emission and controllable particle size. The as-prepared UCNPs were further functionalized via folic acid coating for the targeted imaging and improved bio- compatibility. It was made the UCNPs potential for upconversion bioimaging of living cells by the strong upconversion luminescence, the excellent biocompatibility, and the super-small size. The good colloidal stability and low cell cytotoxicity of the as-prepared UCNPs and the developed synthesis protocol might advance both the fields of UCNPs and biomolecule-based nanotechnology for future studies.
研究领域:
纳米医学
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生物材料
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癌症研究
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DOI
PubMed
高影响因子
Analytical Methods
·
2017
·Vol. 9
·期 42
·6032-6037
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IF 1.9
Bo Ling,Yuanhui Ma,Hongqi Chen,Lun Wang
A new aptamer-based surface plasmon resonance (SPR) system has been designed to detect Hg2+ that utilizes near-infrared (NIR)-to-NIR gold nanoparticle coated NaYF4:Yb,Tm,Gd up-conversion nanoparticles (AuNPs@NaYF4:Yb,Tm,Gd UCNPs) as probes. The AuNPs@NaYF4:Yb,Tm,Gd UCNPs were prepared and excited by near-infrared light (980 nm) which emitted at a near-infrared wavelength (808 nm) using an inexpensive infrared continuous wave laser diode. The AuNPs@NaYF4:Yb,Tm,Gd UCNPs were conjugated with Hg2+ aptamers. In the presence of Hg2+, the AuNPs@NaYF4:Yb,Tm,Gd UCNPs were brought into close proximity because of the formation of T–Hg2+–T base pairs. Then the luminescence enhanced because of the plasmon resonance effects. Based on this, a new SPR system was developed for the detection of Hg2+ that had high sensitivity and selectivity in the NIR region. This method was successfully applied to detect Hg2+ concentration in real samples.
研究领域:
分析化学
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环境科学
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纳米技术
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材料科学
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高影响因子
Frontiers in Chemistry
·
2023
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IF 5.5
Huang Hanchang,Zhong Yanyi,Li Mingchen,Cui Wenda,Yu Tongcheng,Zhao Guomin,Xing Zhongyang,Guo Chuan,Han Kai
In Yb-Er co-doped upconversion (UC) nanomaterials, upconversion luminescence (UCL) can be modulated to generate multiband UCL emissions by changing the concentration of activator Er3+. Nonetheless, the effect of the Er3+ concentrations on the kinetics of these emissions is still unknown. We here study the single β-NaYF4:Yb3+/Er3+ microcrystal (MC) doped with different Er3+ concentrations by nanosecond time-resolved spectroscopy. Interestingly, different Er3+ doping concentrations exhibit different UCL emission bands and UCL response rates. At low Er3+ doping concentrations (1 mol%), multiband emission in β-NaYF4:Yb3+/Er3+ (20/1 mol%) MCs could not be observed and the response rate of UCL was slow (5–10 μs) in β-NaYF4:Yb3+/Er3+. Increasing the Er3+ doping concentration to 10 mol% can shorten the distance between Yb3+ ions and Er3+ ions, which promotes the energy transfer between them. β-NaYF4:Yb3+/Er3+ (20/10 mol%) can achieve obvious multiband UCL and a quick response rate (0.3 µs). However, a further increase in the Er doping concentration (80 mol%) makes MCs limited by the CR process and cannot achieve the four-photon UC process (4F5/2 → 2K13/2 and 2H9/2 → 2D5/2). Therefore, the result shows that changing the Er3+ doping concentration could control the energy flow between the different energy levels in Er3+, which could affect the response time and UCL emission of the Yb/Er doped rare earth materials. Our work can facilitate the development of fast-response optoelectronics, optical-sensing, and display industries.
研究领域:
光学材料
·
物理学
·
材料科学
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Nguyen Thi Ngoc Yen,Vuong Thanh Tuyen,Cao Thi My Dung,Le Thuy Thanh Giang,Tran T.T. Van
The degradation of persistent organic dyes, such as methylene blue (MB), is crucial for protecting aquatic environments, as these compounds are chemically stable and resistant to conventional treatment methods. The TiO 2 -based photocatalysts have been widely explored for pollutant degradation owing to their chemical robustness, eco-friendliness, and strong oxidative capability under light irradiation. However, its wide bandgap (∼3.0–3.2 eV) restricts optical absorption to the ultraviolet region, which comprises only a small portion, less than 5 % of solar energy. In this work, a UCNRs@TiO 2 core–shell nanostructured photocatalyst composed of NaYF 4 :30 Yb 3+ ,0.5 Tm 3+ upconversion nanorods (UCNRs) and TiO 2 nanoparticles was successfully fabricated to enhance both ultraviolet (UV) and near infrared (NIR)-responsive photocatalytic activity. The UCNRs serve as efficient optical converters, absorbing near-infrared light at 980 nm and emitting UV photons to activate TiO 2 , thereby extending its operational spectral range. Photocatalytic activity was evaluated under solar simulated irradiation by monitoring the degradation of MB at a concentration of 15 mg/L. The UCNRs@TiO 2 photocatalyst achieved a remarkable degradation efficiency of 100 % MB within 90 min with an apparent rate constant of 0.063 min −1 , in contrast to 195 min required by bare TiO 2 . In addition, the photocatalytic enhancement mechanism of UCNRs@TiO 2 materials was also proposed based on the results of Photoluminescence, UV–Vis spectra and LC-MS. The excellent stability of the composites after three cycles of reuse demonstrates their promise for the rational design of NIR-driven photocatalysts for sustainable wastewater treatment.
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