OPTICAL MATERIALS
·
2022
·
IF 3.754
Yinyin Chen,Xinying She,Zhouping Yang,Changfang Lu,Wei Zhang,Dongju Feng,Wei Wu,Xianxiang Wang
Doxorubicin hydrochloride (DOX), an anthraquinone-based antibiotic, is widely used in human tumors treatment. However, the residues of DOX in body would pose a threat to the health of heart and liver. Herein, a photochemical sensor NaYF 4 :Yb/Tm@NaYF 4 :Yb-Cit-CD (UCNPs) for detecting DOX has been developed in this paper. The fluorescence emission spectrum of UCNPs under 980 nm laser excitation has a wide range overlap with UV–vis absorption spectrum of DOX. Therefore, the fluorescence emission of UCNPs at 480 nm can be quenched by DOX. The UCNPs sensor has displayed a linear range of 0.05–20 μg/mL with a detection limit (LOD) of 0.005 μg/mL for DOX. Furthermore, the results of recovery for DOX in human serum samples is 98.68–104.20% and in accord with those obtained by HPLC and UV–vis.
研究领域:
生物医学工程
·
药物分析
·
纳米技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Zeinab Marfavi,Ruihao Yang,Lingbo Wei,Yijun Han,Quanjie Lv,Yingfan Dai,Kang Sun,Congli Yuan,Ke Tao
Day–night photocatalysts that can persistently generate reactive oxygen species (ROS) after ceasing light attracted intensive attention in diverse fields. However, current strategies of combining a photocatalyst and an energy storage material can hardly fulfill the demands, especially in size. We herein present a one-phase sub-5 nm day–night photocatalyst via simply doping Nd, Tm, or Er into YVO4:Eu3+ nanoparticles, efficiently producing ROS in both day and night modes. We demonstrate that the rare earth ions acted as a ROS generator, and Eu3+ and defects contributed to the long persistency. Furthermore, the ultrasmall size led to remarkable bacterial uptake and bactericidal efficacy. Our finding suggests an alternative mechanism of day–night photocatalysts that could be ultrasmall and thus may shed light on disinfection and other applications.
研究领域:
材料科学
·
纳米技术
·
光催化
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
AIP Advances
·
2024
·Vol. 14
·期 5
·
IF 1.4
Liu Peng,Ren Weijun,Guo Qing,Zhang Zhao,Zhao Xueting,Zhang Zhidong,Dai Wei,Li Bing
Cryogenic refrigeration technology based on magnetocaloric effects plays a critical role in a variety of technological applications. In this paper, we report the cryogenic magnetocaloric effects of a series of sodium-rare earth fluoride samples (Ln = Gd, Tb, Dy, Ho, Er, Tm, Yb) synthesized by the solid-state reaction method. These compounds all crystallize in a hexagonal crystal structure. Down to 2 K, no magnetic ordering was detected, while all compounds show negative Curie–Weiss temperatures indicative of strong antiferromagnetic coupling. Magnetic fields effectively suppress the magnetic fluctuations, leading to a maximum magnetic entropy change of −56 J kg −1 K −1 in NaGdF 4 at the magnetic field change from 0 to 50 kOe. These series of compounds are potentially excellent magnetic refrigerants at low temperatures.
研究领域:
物理学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Yubing Zheng,Furong Chen,Yidan Liu,Huan Song,Baojuan Kang,Xiaoxuan Ma,Zhenjie Feng,Lei Huang,Shixun Cao,Rongrong Jia
Transition metal oxides have gained significant recognition for their remarkable catalytic performance in the oxygen evolution reaction (OER). Among this group, the perovskite-structured AB O 3 compounds have emerged as prospective OER electrocatalysts , particularly when selections are made for the constituents occupying the A and B sites. Here, we employed a simple solid-state reaction method to synthesize perovskite-structured R FeO 3 ( R = Tm, La) and subsequently loaded them on high-conductive nickel foam (NF) for OER. The results reveal that R FeO 3 /NF ( R = Tm, La) catalysts exhibit low overpotentials of 361 mV and 357 mV, respectively, for OER at a current density of 10 mA·cm −2 , indicating substantial advancements in both catalytic activity and efficiency.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 28
·14642-14650
·
IF 7.443
Yongmei Ma,Honglin Liu,Zhenzhen Han,Liangbao Yang,Jinhuai Liu
An effective near-infrared (NIR) active photocatalyst, NaYF4:Yb,Tm@TiO2/Ag (UC@TiO2/Ag) core@comby shell composite, was synthesized by a simple three-step hydrothermal process. Under the full-spectrum light of a Xe lamp in UV-Vis absorbance experiments, about 96% of R6G dyes in solution were degraded by UC@TiO2/Ag in 120 minutes, while only about 64% of the dyes were degraded by pure TiO2 under the same conditions. Under a UV-filtered Xe lamp, about 35% of the dyes were degraded by UC@TiO2/Ag in 120 minutes; interestingly, only about 8% of the dyes were degraded by pure TiO2. Under irradiation by a 785 nm laser in surface enhanced Raman scattering (SERS) experiments, the photodegradation rate constants were 0.02612 s−1 for UC@TiO2/Ag and 0.00046 s−1 for TiO2/Ag, indicating a nearly 58 fold improvement. After deducting the photobleaching effect, the photodegradation rate constants for UC@TiO2/Ag under 633 and 532 nm lasers were 0.00715 s−1 and 0.00565 s−1, respectively, revealing a sharp decrease under irradiation at shorter wavelengths. Electron spin resonance (ESR) analysis revealed that the presence of UC in this photocatalytic system certainly induced the increase of ˙OH free radicals with NIR irradiation, i.e. the UC core converts NIR light into ultraviolet (UV) light and initiates excellent photocatalytic activity of the TiO2/Ag comby shell. Furthermore, the decorating of Ag nanoparticles not only enhances the photocatalytic ability, but also provides a structural basis for monitoring the photocatalytic kinetics by the SERS technique. By virtue of monochrome laser lines, SERS analysis provides direct evidence to prove the capability of UC-initiated non-UV photocatalysis and the improvement of the utilization of non-UV lights on TiO2. The results revealed that this new photocatalytic platform can efficiently utilize different bands of the solar spectrum and also find new applications in SERS fields.
研究领域:
材料科学
·
光催化
·
纳米技术
·
光谱学
·
环境化学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Xiaolong Chen,Xiangyu Chen,Xuesong Zhai,Yin Li,Wei Zhao,Wu Sun,Qinfang Zhang,Jing Feng
Internal OH– defects always cause significant depletion of excitation energy for low upconversion efficiency; however, preventing the incorporation of OH– into the crystal lattice is very difficult during the synthesis of upconversion crystals. In this work, red upconversion emission is dramatically enhanced in Er3+-sensitized hexagonal NaLuF4 (β-NaLuF4) microcrystals through a collaborative effect of ion exchange and Tm3+ doping. The ion exchange can not only maintain the morphology very well but also strongly reduce the internal OH– defects, which can enhance the upconversion luminescence due to improved excitation energy harvesting and red to green (R/G) ratio due to intense cross-relaxation. Doping of Tm3+ as an energy trapping center not only regulates the red emission output but also reduces the excitation energy loss. β-NaLuF4:Er,Tm microcrystals after ion exchange exhibit stronger red upconversion emission compared with β-NaYF4:Er,Tm and β-NaGdF4:Er,Tm counterparts. Moreover, fluorescent labeling of the fingerprint pattern printed from β-NaLuF4:Er,Tm microcrystals with stable and intense red fluorescence has been demonstrated under 980 nm excitation.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2024
·Vol. 36
·期 30
·2401694
·
IF 27.4
Yin Zhu,Yanxu Chen,Yafei Feng,Xiangmin Meng,Jing Xia,Genqiang Zhang
Hydrazine oxidation-assisted water splitting is a critical technology to tackle the high energy consumption in large-scale H 2 production. Ru-based electrocatalysts hold promise for synergetic hydrogen reduction (HER) and hydrazine oxidation (HzOR) catalysis but are hindered by excessive superficial adsorption of reactant intermediate. Herein, this work designs Ru cluster anchoring on NiFe-LDH (denoted as Ru c /NiFe-LDH), which effectively enhances the intermediate adsorption capacity of Ru by constructing Ru─O─Ni/Fe bridges. Notably, it achieves an industrial current density of 1 A cm −2 at an unprecedentedly low voltage of 0.43 V, saving 3.94 kWh m −3 H2 in energy, and exhibits remarkable stability over 120 h at a high current density of 5 A cm −2 . Advanced characterizations and theoretical calculation reveal that the presence of Ru─O─Ni/Fe bridges widens the d-band width (W d ) of the Ru cluster, leading to a lower d-band center and higher electron occupation on antibonding orbitals, thereby facilitating moderate adsorption energy and enhanced catalytic activity of Ru.
研究领域:
材料科学
·
电化学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 21
·18370-18380
·
IF 2.22
Yun Xiangyan,Zhou Jun,Zhu Yaohui,Molokeev Maxim S.,Jia Yetong,Wei Chao,Xu Denghui,Sun Jiayue
The discovery of stable and highly sensitive up-conversion (UC) phosphors using the fluorescence intensity ratio (FIR) is a significant challenge in the field of optical temperature sensor. Er 3+ /Ho 3+ /Tm 3+ -doped LiYbMo 2 O 8 UC phosphors with excellent luminescence properties were successfully synthesized through a high-temperature solid-state reaction, and the crystal structure and UC luminescence properties were discussed in detail. The UC process has been investigated by spectra pump power dependence and further explained via the energy level diagram. All emission processes about Er 3+ ions and Ho 3+ ions are two-photon processes and the blue emission process about Tm 3+ ions is a combination of two-photon process and three-photon process. Thermal sensing performances depended on FIR technology were estimated and the sensitivities of LiYb 1− x Mo2O8: x Ln 3+ included absolute sensitivity ( S a ) and relative sensitivity ( S r ) can produce particular change rules with the temperature, which can serve as excellent candidates for applications in optical temperature sensing. With the increase of temperature, the maximum values of S r of LiYb 1− x Mo 2 O 8 : x Ln 3+ are 1.16% K −1 (0.05Er 3+ ), 0.25% K −1 (0.01Ho 3+ ), and 0.51% K −1 (0.01Tm 3+ ), respectively. In addition, the S a value of LiYb 0.95 Mo 2 O 8 :0.05Er 3+ phosphor will reach the maximum (1.08% K −1 ) at 475 K, while the maximum values of S a of LiYb 0.99 Mo 2 O 8 :0.01Ho 3+ and LiYb 0.99 Mo 2 O 8 :0.01Tm 3+ are 0.16% K −1 , 0.14% K −1 .
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
ChemistrySelect
·
2026
·Vol. 11
·期 11
·e07294
·
IF 2.3
Guomin Li,Zhuoyang Li,Liqiu Zhang,Pinliang Lai,Bing Wang
With rapid industrialization and population growth, ecological environmental impacts have become increasingly prominent, with organic wastewater being particularly harmful. Traditional water treatment technologies struggle to degrade organic pollutants. Photocatalysis combined with persulfate oxidation has emerged as one of the most promising and practical advanced oxidation technologies due to its efficiency and environmental friendliness. However, this technology remains in its early stages for wastewater treatment. This study investigated the composite system of these two technologies for treating refractory organic pollutants. A single photocatalytic system was fabricated by calcining thulium-doped mesoporous g-C 3 N 4 (TMCN). Ammonium persulfate (APS) was then added to create a photocatalytic-persulfate synergistic system for degrading various dyes and antibiotics. The synergistic system significantly enhanced Rhodamine B degradation, achieving 9.8 times higher efficiency than the single photocatalytic system. Excellent degradation was also observed for tetracycline, tylosin, methyl orange, and norfloxacin. Optimal performance was achieved with 0.005% Tm doping. Cycling experiments confirmed system stability. Free radical scavenging experiments revealed the importance order: O2•-, SO4•-, h+, and •OH. Tm doping increased specific surface area, regulated band gap, extended visible light absorption, and improved photogenerated charge separation efficiency, collectively promoting enhanced photocatalytic activity.
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产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Yuzhen Wang,Yanbin Li,Chaoyang Ma,Zicheng Wen,Xuanyi Yuan,Yongge Cao
In this study, NaYTiO 4 : Yb/Tm phosphors with different concentrations of Yb 3+ and Tm 3+ ions were synthesized by conventional solid-state reaction. Upon a 980 nm laser excitation, the up-conversion luminescence properties in a wide temperature range (303–823 K) were investigated. By employing the fluorescence intensity ratio (FIR) techniques based on the robust near-infrared emissions of thermally coupled 3 F 2,3 / 3 H 4 energy levels and 3 H 4(1) / 3 H 4(2) Stark energy levels, the calculated absolute sensitivity (S a ), relative sensitivity (S r ), and temperature uncertainty (δT) values demonstrated good temperature sensing properties. For the 3 F 2,3 / 3 H 4 energy levels, the maximum S r and minimum δT values are 1.04% K −1 and 0.010 K at 463 K, respectively. Moreover, the maximum S a is 0.32 × 10 −3 K −1 at 823 K. In addition, the thermally coupled 3 H 4 Stark energy levels present the maximum S a , S r and the minimum δT are 0.88 × 10 −3 K −1 , 0.60% K −1 and 3.17 K at 303 K, respectively. Besides, due to the ratio of blue to red emission varying with elevated temperature, the NaYTiO 4 : Yb/Tm phosphors are expected to be applied as an intuitive high-temperature indicator.
研究领域:
材料科学
·
光学材料
·
传感器技术
·
固体化学
·
功能材料
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2019
·Vol. 125
·期 11
·1-8
·
IF 1.784
Zhou Xinquan,Ju Guifang,Dai Tiansong,Li Yang,Wu Haoyi,Hu Yihua
Long-persistent phosphor and up-conversion particles used for optical imaging continue to interest researchers. The present work identifies an Er 3+ doped micro-sized CSAO-CSO mixed material that exhibits both up-conversion and persistent luminescence. The cross-relaxation that occurs among Er 3+ ions contributes to enhancing the up-conversion intensity. The Tm 3+ /Ho 3+ co-doped strategy was used to induce tunable up-conversion colors. The cross-relaxation process corresponding to the energy transfer mechanism was investigated via the luminescence lifetimes of Er 3+ . Moreover, the persistent luminescence and thermo-luminescence properties of CSAO-CSO: Er 3+ were also investigated systematically. Our results combine the fields of up-conversion and persistent luminescence, which may support other explorations of new kinds of long-persistent and up-conversion materials.
研究领域:
材料科学
·
生物医学工程
·
光学成像
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
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
·
材料科学
·
化学分析
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）