Journal of Materials Chemistry B
·
2020
·Vol. 8
·期 37
·8634-8643
·
IF 5.344
Yongmei Li,Yuemei Li,Yandong Bai,Laixiang Lin,Yina Sun
Cerium oxide nanoparticles (NPs) due to their advanced catalytic performance have been widely used to treat oxidative damage. However, Ce2O3 NPs have not been further investigated in the treatment of acute oxidative injury in vivo. It is meaningful to improve the efficiency for treatment of acute oxidative injury with NPs in vivo. In this report, we designed Er3+-doped Ce2O3 (Er/Ce2O3) NPs with a size of 7.9 nm, which were used to treat acute liver injury. Er/Ce2O3 NPs realized high-efficiency catalysis of hydrogen peroxide (H2O2) at room temperature. An acute liver damage model was established through intraperitoneal injection of lipopolysaccharide (LPS) in C57 mice. By analyzing histopathological and biochemical indexes, Er/Ce2O3 NPs showed a significant improvement in LPS-induced acute liver injury. Acute liver oxidative damage can be treated within 24 hours, which proved the high catalytic efficiency of Er/Ce2O3 NPs in vivo. The activities of SOD, GPx and CTA increased and production of ROS decreased with Er/Ce2O3 NP treatment in comparison with LPS-induced injury, indicating that the mechanism of Er/Ce2O3 NPs in the treatment of acute oxidative damage of liver was mainly via catalysis of ROS products. Moreover, the protein expression levels of TNF-α, CD45 and IL-1β in liver decreased in the Er/Ce2O3 NPs-treated group, which indicated that Er/Ce2O3 NPs have the function of anti-inflammation property. Therefore, Er/Ce2O3 NPs can be applied to treat and prevent diseases caused by acute oxidative damage.
研究领域:
纳米技术
·
生物医学工程
·
药理学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Nianbing Zhong,Ming Chen,Haixing Chang,Tianheng Zhang,Zhengkun Wang,Xin Xin
We present a high-selectivity photochemical fiber-optic sensor in which a plastic optical fiber (POF), TiO 2 -based composite, and polymer membrane are coupled for detection of phenol concentrations in water. A thinned POF is coated with TiO 2 -based composite, which is composed of Er 3+ :YAlO 3 /SiO 2 /TiO 2 (EYST) and acts as the sensing region. The EYST coating shows good light-inducing capacity at the core–coating interface and high photocatalytic activity in the visible light region. The polymer membrane is synthesized using PEBA2533 doped with β-cyclodextrin and shows high phenol selectivity and permeability; thus, phenol molecules can freely permeate the membrane and are then transferred, become attached to the surface of TiO 2 nanoparticles, and are photocatalytically degraded. Photocatalytic degradation of phenol improves the refractive index (RI) and absorbance of the solution because of the photocatalytic byproducts; consequently, the transmitted output light intensity of the sensor changes, and the phenol concentration is accurately detected by measuring the change in the light intensity. Experimental results indicate that the prepared device detects phenol in water with high selectivity and pH independence; in phenol detection, the novel sensor shows a sensitivity of −0.195 × 10 −3 (mg/L) −1 and a low limit of detection of 40 μg/L.
研究领域:
环境科学
·
分析化学
·
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ECS Journal of Solid State Science and Technology
·
2021
·Vol. 10
·期 10
·106008
·
IF 2.07
Zhurong Mo,Yanping Huo,Haoyi Wu,Brij Mohan,Hongli Wen,Li Luo,Deshmukh Abdul Hakeem
We report the synthesis and the effect of synthesis temperature on the crystal structure and dual mode (DC/UC) luminescence properties of the NASE-1000–1300. Two different polymorphs, i.e., nepheline and carnegieite of the NASE have been prepared just by changing the annealing temperature. Multi wavelength excitation can be used to obtain different emissions in visible and NIR regions. Under 380 and 980 nm excitation, the NASE-1000–1300 produces 1535 nm NIR emission, whereas green and red visible emissions are observed with 980 and 808 nm laser excitations. Under 980 nm laser excitation, the synthesis temperature dependent nepheline and carnegieite polymorphs emit intense red and green emission, respectively. Two-photon process is responsible for the green and red UC emissions of the NASE-1300. The NASE-1000-1300 produces intense red emission under 808 nm laser excitation. We believe that the NASE-1000–1300 could be a promising candidate for the photonic as well as biological applications.
研究领域:
材料科学
·
光学
·
磷光材料
·
发光材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Tianzhi Jiang,Xuejiao Wang,Renguang Ye,Youjie Hua,Xinfeng Jin,Weigang Guo,Guoqing Liu,Zhiqiang Long,Buqing Zhang,Gongxun Bai,Junjie Zhang,Shiqing Xu
The quenching of luminescence in Er 3+ /Yb 3+ co-doped with Tm 3+ presents a dilemma as it substantially diminishes thermometric performance. In this study, Y 2 O 2 S: Er 3+ /Yb 3+ /Tm 3+ phosphors were synthesized using a homogeneous precipitation method combined with a sulfurization process. In addition, three sets of fluorescence intensity ratio (FIR) models were designed, which have self-calibration function. The effects of incorporation of Li + or Li + /Ba 2+ on the up-conversion luminescence (UCL) intensity and thermometric performance of the phosphors were systematically studied. The results show that the introduction of Li + or Li + /Ba 2+ co-doping leads to lattice distortion and the formation of oxygen ion vacancies in the lattice, which further accelerates the energy transfer process and mixes the charge transfer states , and ultimately dramatically improves the UCL and thermometric performance. The introduction of Li + and Li + /Ba 2+ co-doping enhanced the UCL of the materials by about 3.7 times and 5.6 times compared to Y 2 O 2 S: Er 3+ /Yb 3+ /Tm 3+ . When based on nonthermally coupled levels (NTCLs), the S r-max of Li + /Ba 2+ co-doped sample is 0.080 K −1 at 573 K, which is 87 % higher than that based on TCLs. These findings not only provide a new avenue for improving the UCL and thermometric performance but also provide an accurate self-calibration FIR model over a wide temperature range.
研究领域:
材料科学
·
光学
·
物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Qifeng Chen,Yu Yao,Shuo Zheng,Qianhong Shen,Libei Jiang,Qinhua Fang,Hui Yang
A novel Yb 3+ /Er 3+ co-doped BiOBr photocatalyst with 3D flowerlike hierarchical architectures were successfully fabricated through self-assembled process without any templates under hydrothermal conditions, and the structure and properties of the photocatalysts were characterized. The results indicate that Yb 3+ ions and Er 3+ ions are successfully doped into the lattice of BiOBr, and the as-obtained photocatalyst can respond the NIR light and emit red and green light due to the up-conversion effect of the rare-earth ions. Meanwhile, with co-doped Yb 3+ /Er 3+ ions content increasing, oxygen vacancy concentration in the photocatalyst rises. The oxygen vacancy will form the intermediate energy band, which can decrease the photon energy required for electronical transition, and thus help to utilize the luminous energy generated by up-conversion luminescence. Moreover, the appropriate introduction of defects (oxygen vacancy defect and impurity atom) can further promote the transfer and separation efficiency of photo-generated carriers. Hence, Yb 3+ /Er 3+ co-doped BiOBr photocatalyst exhibits enhanced photocatalytic properties under broad spectrum (UV/vis/NIR) excitation, which is about 4 times as high as that of pure BiOBr.
研究领域:
材料科学
·
光催化
·
纳米技术
·
光电
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
You Li,Sai Xu,Qun Zhang,Yuefeng Gao,Xizhen Zhang,Yongze Cao,Hongquan Yu,Xiangping Li,Baojiu Chen
Inorganic lead-free halide perovskites are quite desirable for various applications due to their outstanding optoelectronic performances. However, excitation wavelength-dependent multi-emission in a single luminophore is less reported. In this study, Sb 3+ /Bi 3+ /Er 3+ codoped Cs 2 Ag 0.1 Na 0.9 InCl 6 lead-free double perovskite with upconversion and downshifting luminescence modes has been developed. The double perovskite displays a dual-emission band located at 450 nm and 580 nm under excitation of 355 nm. The blue emission originates from self-trapped excitons (STEs) in [SbCl 6 ] 3- octahedrons, while the yellow emission comes from STEs between states localized in the BiCl 6 and AgCl 6 octahedra. Interestingly, the phosphor’s emission can be dynamically adjusted by excitation wavelength and Sb 3+ doping concentration. Not only that, the phosphor can also generate upconversion green light upon the irradiation of 980 nm lasers. The multi-excitation wavelength characteristics of this perovskite make it very suitable as a material for anti-counterfeiting and encoded information storage, and the excellent temperature stability and moisture resistance of this perovskite also make it more promising.
研究领域:
材料科学
·
光电技术
·
光子学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Jianyuan Li,Yingjun Li,Lu Zi,Shasha Wang,Gejihu De
Bismuth-based composite fluoride upconversion luminescent materials exhibit uniform size and excellent upconversion properties. These materials have potential applications in photodynamic therapy, anti-counterfeiting technology, and bio-imaging. Thus, bismuth-based composite fluoride luminescent materials have been the subject of extensive study in recent years. This paper focuses on the design and synthesis of bismuth-based composite fluorides, specifically Yb 3+ /Er 3+ co-doped Ba 0.6 Bi 0.4 F 2.4 and its heterostructured Ca 0.6 Bi 0.4 F 2.4 upconversion luminescent materials. The study involves measuring room temperature fluorescence spectra, fluorescence lifetime, and quantum yield, demonstrating the exceptional luminescence performance of Ca 0.6 Bi 0.4 F 2.4 :Yb 3+ /Er 3+ . More importantly, we successfully obtained transparent lanthanide-doped Ca 0.6 Bi 0.4 F 2.4 thermoplastic polyurethane (TPU) luminescent films and upconversion luminescent inks. This work highlights the great potential of upconversion nanomaterials in anti-counterfeiting fields.
研究领域:
材料科学
·
光学
·
纳米技术
·
生物医学工程
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Rangwei Meng,Zhiyuan He,Xuanhui Luo,Chi Zhang,Mengwei Chen,Halfei Lu,Yingping Yang
In this study, NaGdF 4 :Yb 3+ , Er 3+ @NaGdF 4 :Eu 3+ (NGEY@NGE) core-shell rare earth nanoparticles are prepared by a simple hydrothermal method . After testing, the emission peaks are observed at 415, 525, 540 and 660 nm with an excitation light of 980 nm due to the up-conversion luminescence from rare-earth nanoparticles . Under light excitation at 395 nm, the rare-earth nanoparticles undergo down-conversion luminescence with emission peaks at 590, 610 and 695 nm. The resulting nanoparticles are introduced into the TiO 2 mesoporous layer of hole-conductor-free perovskite solar cells (PSCs) based on carbon counter electrodes to broaden the spectral response of the cells from the visible range to the near-infrared and near-ultraviolet regions, which can guarantee a high light absorption efficiency and corresponding accelerated generation of electron-hole pairs. The results suggest that the mixing of NGEY@NGE nanoparticles into mesoporous TiO 2 layer improves the power conversion efficiency of PSCs to 14.21%, which is 10.6% higher than that of the control cells, which can pave an effective way to improve the performance of PSCs with a broadened response range.
研究领域:
材料科学
·
纳米技术
·
太阳能
·
光电
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Dongxun Chen,Fang Wang,Jianqiang Bi,Weili Wang,Lu Wang,Kangning Sun,Dongqi Tang,Yanjie Liang
Bi 2 O 3 nanospheres co-doped with Yb 3+ /Er 3+ upconverting ions pair have been successfully synthesized via a facile hydrothermal method followed by a heat treatment. The resulting Bi 2 O 3 :Yb 3+ ,Er 3+ nanospheres show a monodisperse spherical morphology with narrow size distribution (~180 nm) and display intense upconversion luminescence under 980 nm laser excitation. It is found that the crystal structure, morphology and upconversion luminescence properties of nanospheres have a direct relationship with the doping concentration of Yb 3+ and the subsequent calcination temperature. These Bi 2 O 3 :Yb 3+ ,Er 3+ nanospheres can be prepared in large quantities and can be easily modified with a layer of biocompatible polyethyleneimine (PEI) molecules. The yielded nanospheres could not only maintain uniform size and morphological characteristics, but also show good water dispersibility and biocompatibility. Remarkably, these Bi 2 O 3 :Yb 3+ ,Er 3+ upconversion nanophosphors could also act as an effective contrast agent for X-ray computed tomography (CT) imaging, which show higher contrast efficacy than commercial iodine-based contrast agent. The proposed facile synthetic route and inexpensive matrix materials pave the way for broad use of these Bi 2 O 3 :Yb 3+ ,Er 3+ nanospheres as ideal dual-mode bioimaging probes in biomedical field.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
·
光学成像
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Boxu Xu,Chao Song,Jie Song,Rui Huang,Zhenxu Lin,Yi Zhang,Shaomin Lin,Jun Song
In this study, a series of well-crystallized Yb 3+ /Er 3+ /Tm 3+ -tridoped Y 2 O 3 –ZnO ceramic phosphors were prepared using sol–gel synthesis, and the phosphor structures were studied using X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis . The phosphors had excellent physical stability and porous structure. All phosphors generated blue, green, and red emission bands attributed to Tm: 1 G 4 → 3 H 6 , Er: 2 H 11/2 ( 4 S 3/2 )→ 4 I 15/2 , and Er: 4 F 9/2 → 4 I 15/2 radiative transitions , respectively. The emissions were intensified twice by tuning the Tm 3+ ratio in the host matrix Y 2 O 3 and ZnO parts. The color coordinates were adjusted by tuning both the Tm 3+ concentration and the excitation laser pump power to shift the color coordinates and only enhance the brightness, respectively. Meanwhile, heating phosphors can also linearly adjust the color coordinates of the luminescence. Therefore, it can also be used as a fluorescence thermometer in the field of temperature sensor . The study findings will broaden the phosphor practical application potential.
研究领域:
材料科学
·
光学
·
陶瓷
·
发光材料
·
温度传感
✓ 已验证
产品关联
DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2016
·
IF 4.556
Guanshu Li,Hongbo Zhang,Chunsheng Wei,Yingying Huang,Xuekai Dou,Yidi Wang,Jun Wang,Youtao Song
(5.0%)Er 3+ :Y 3 Al 5 O 12 /Pt-(TiO 2 -Ta 2 O 5 ) powder, as a high effective sonocatalyst, was prepared using sol-gel and calcination method. Then it was characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX). In order to evaluate the sonocatalytic activity of the prepared (5.0%)Er 3+ :Y 3 Al 5 O 12 /Pt-(TiO 2 -Ta 2 O 5 ) powder, the sonocatalytic decomposition of ametryn was studied. In addition, some influencing factors such as different Ti/Ta molar ratios on the sonocatalytic activity of the prepared (5.0%)Er 3+ :Y 3 Al 5 O 12 /Pt-(TiO 2 -Ta 2 O 5 ) powder, catalyst added amount with ultrasonic irradiation time and used times on the sonocatalytic decomposition efficiency were examined by using ion chromatogram determination. The experimental results showed that the best sonocatalytic decomposition ratio of ametryn were 77.50% based on the N atom calculation and 95.00% based on the S atom calculation, respectively, when the conditions of 10.00 mg/L initial concentration, 1.00 g/L prepared (5.0%)Er 3+ :Y 3 Al 5 O 12 /Pt-(TiO 2 -Ta 2 O 5 ) powder (Ti/Ta = 1.00:0.25 heat-treated at 550 °C for 3.0 h) added amount, 150 min ultrasonic irradiation (40 kHz frequency and 300 W output power), 100 mL total volume and 25–28 °C temperature were adopted. Therefore, the (5.0%)Er 3+ :Y 3 Al 5 O 12 /Pt-(TiO 2 -Ta 2 O 5 ) composite nanoparticles could be considered as an effective sonocatalyst for decomposition of ametryn in aqueous solution.
研究领域:
材料科学
·
环境科学
·
化学工程
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Yue Wu,Na Liu,Xiao-Xia Ren,Wen-Chao Zhang,Jing Qian
Combination therapy could significantly improve the therapeutic effect of tumors. However, due to the lack of reasonable integration of different treatment modes, it is difficult to maximize the effect of combination treatment. To solve this problem, by adjusting the dosage of NH4F/NaOH, we developed NaTmF4:0.5%Er3+@NaLuF4 upconversion nanoparticles with strong near-infrared luminescence. On this basis, nanocarriers (USFH-CI) encapsulated with high-loading (33.35%) Fe(acac)3, wrapped by human serum albumin, and grafted with cinnamic aldehyde (CA) and the IR780 photosensitizer were constructed. The dense extracellular matrix (ECM) in tumor tissues prevented the drug from diffusing into the tumors. Once USFH-CI nanocarriers were delivered to the tumor area, CA pH-responsively released H2O2, which promoted photothermal therapy (PTT) and photodynamic therapy (PDT) of IR780 driven by upconversion luminescence. A large number of reactive oxygen species (ROS) were generated, which led to the disintegration of the ECM and penetration into the tumors. Then, abundant Fe3+ consumed GSH to generate ample GSSG and Fe2+, which enhanced the sensitivity of tumor cells to oxidative stress, thus leading to the accumulation of lipid peroxide (LPO) and finally inducing ferroptosis. At the same time, substantial H2O2 and Fe2+ triggered off the Fenton-like reaction, releasing affluent free radicals. Beyond that, PTT of IR780 further promoted the Fenton-like reaction, and the generation of ROS was amplified. Free radicals generated in the process of ferroptosis destroyed heat shock protein produced by PTT, which solved the self-protection of cancer cells against heat. In situ ROS generation by the PTT/PDT of IR780 and the Fe2+ Fenton-like reaction further promoted the accumulation of LPO and ferroptosis as well as deep penetration, which maximized the effect of combination treatment and achieved a high tumor inhibition rate (84.71%). Also, there was negligible damage to normal tissues with good tumor targeting and digestive metabolism.
研究领域:
纳米技术
·
癌症治疗
·
材料科学
·
生物医学工程
·
光化学
·
药学
✓ 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）