JOURNAL OF RARE EARTHS
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2024
·
IF 5.2
Zhigang Gao,Lugui Cui,Yushi Chu,Luyue Niu,Jing Xiao,Jing Ren
In this work, rare earth ions (REs) including Yb 3+ /Er 3+ , Yb 3+ /Ho 3+ and Yb 3+ /Tm 3+ co-doped manganese oxyfluoride glasses were fabricated using melt quenching method. By fully utilizing the upconversion luminescence (UCL) of REs and regulating energy transfer between the different energy levels of RE ions and the 4 T 1 level of Mn 2+ , the output of UCL was regulated and even pure-red light can be achieved. Moreover, owing to the selective partitioning caused by phase-separation network structure in the oxyfluoride glass, the UCL intensity of glasses annealed for 72 h is significantly enhanced 58 times compared to the rapidly quenched samples.
研究领域:
材料科学
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光学
·
光子学
✓ 已验证
产品关联
DOI
高影响因子
Materials Research-Ibero-american Journal of Materials
·
2019
·
IF 1.104
Dan Ho Kim,Tap Tran Duy,Nguyen-Truong Hieu,Ty Nguyen Minh,Zhou Dacheng,Qiu Jianbei
The SiO2-Al2O3-BaF2-TiO2-CaF2 transparent silicate glass-ceramics containing BaF2 nanocrystals were successfully prepared by heat treatment process through conventional melting method. Effects of heat treatment processes and Yb3+ concentration on the downconversion (DC) emission of the co-doped Er3+/Yb3+ transparent silicate glass-ceramics were investigated. With the increase of temperatures and times of heat treatment process, the DC emission intensity of the co-doped Er3+/Yb3+ glass-ceramics was significantly enhanced. At the same time, with the increase of Yb3+ concentration, the value of DC intensity of Er3+/Yb3+ co-doped bands centered at 849, 883 and 1533 nm is maximized when the concentration of Yb3+ reaches 2.5 mol.%. When the concentration exceed 2.5 mol. %, the DC emission intensity of Er3+/Yb3+ co-doped bands centered at 849, 883 and 1533 nm was decreased, owing to the self-quenching effect. It’s interesting that the DC emission intensity of Er3+/Yb3+ co-doped band centered at 978 nm didn’t quench when the Yb3+ concentration exceed 2.5 mol. %. At the same time, the DC mechanism and ET processes between Yb3+ and Er3+ ions were discussed.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2018
·Vol. 25
·期 5
·1531-1539
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IF 1.858
Wang Shiwei,Chen Keyu,Wang Qibao
The catalytic performance of Yb(OTf) 2 –SO 3 –SBA-15 in the transformation of cellulose into lactic acid was investigated in this paper. The sol–gel technique and the chemical grafting approach were introduced to obtain the SBA-15 and Yb(OTf) 2 –SO 3 –SBA-15, respectively. Yb(OTf) 2 –SO 3 –SBA-15 catalysts were characterized by elemental analysis, ICP-OES, XRD, N 2 adsorption, FTIR, TGA, 29 Si-MAS NMR, SEM and TEM. It is found that the Yb(OTf) 2 –SO 3 –SBA-15 catalyst can catalyze the transformation of cellulose into lactic acid effectively. When the temperature is 220 °C and the reaction time is 60 min, the maximum yield of lactic acid can reach 74.06%. Yb(OTf) 2 –SO 3 –SBA-15 catalyst can be recycled for more than five times without noticeable loss in activity.
研究领域:
化学工程
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材料科学
✓ 已验证
DOI
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2018
·Vol. 125
·期 2
·923-936
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IF 1.515
Shiwei Wang,Qibao Wang
Ytterbium triflate was immobilized on SBA-15 via chemical grafting and co-condensation and the catalytic performance of the immobilized ytterbium triflate for the selective conversion of glucose into lactic acid was investigated in this paper. The characterization results showed that ytterbium triflate was immobilized on SBA-15 successfully. It was found that the immobilized ytterbium triflate catalyst can catalyze the transformation of glucose into lactic acid effectively. The 58.01% yield of lactic acid was obtained from glucose at 200 °C. The HPLC analysis results of the products showed that the glyceraldehyde might act as an intermediate for the formation of lactic acid during the reaction. The immobilized ytterbium triflate catalyst was recycled for more than five times without noticeable loss in activity.
研究领域:
生物化学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2021
·
IF 2.917
Qing SHU,Chun-fa LIAO,Wen-qiang ZOU,Bao-quan XU,Yu-hui TAN
The adsorption characteristics and mechanisms of spirulina powder were investigated when it was used as adsorbent to recover ytterbium(III) from wastewater solution. Surface structure and element valence of the adsorbent were analyzed by SEM and XPS for the exploring of its adsorption mechanism for ytterbium(III). The adsorption characteristics of ytterbium(III) on spirulina powder was analyzed through assessing adsorption isotherm, kinetics and thermodynamic models. The adsorption isotherm data were best explained by Langmuir model, and the adsorption capacity of spirulina powder for ytterbium(III) was 72.46 mg/g when adsorption temperature was 318 K. The kinetic experiment results showed that the pseudo-second order kinetic model can better simulate the adsorption process of spirulina powder to ytterbium(III), indicating that the rate-controlling step was chemical adsorption. Spirulina can be an efficient and economical ytterbium(III) recycling material, because it showed good adsorption stability and reusability from the adsorption−desorption cycle experiment results.
研究领域:
环境科学
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生物技术
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2019
·
IF 2.961
Qianru Zhao,Jiang Zhao,Min Tao,Cheng Wang,Xueqin Zeng,Yongmin Hu,Shengfu Wang,Minghua Zeng,Wei Zhou,Haoshuang Gu,Yuebin Li
The lanthanide doped NaYF 4 , one of the most efficient upconverting materials, which shows great potential in the applications of future optoelectronic devices. Although there are many progress on the synthesis and performance modulations of upconversion fluorescence single crystal and nanoparticles , it is still a great challenge to fabricate upconverting thin film to compatible with modern planar silicon photoelectronic devices. In this work, patterned NaYF 4 : Yb 3+ , Er 3+ thin films were prepared by a well-designed strategy combined with photolithography and electrodeposition at 50 °C. The thickness of NaYF 4 : Yb 3+ , Er 3+ thin films could be modulated from 1.6 ± 0.3 to 6.1 ± 0.4 μm by the deposition time. After the further annealing at 300 °C, the NaYF 4 : Yb 3+ , Er 3+ thin films present efficient green upconversion fluorescence with fine spectra from 510 to 720 nm, which resulted from the electronic transitions of doped Er 3+ ions . The application of laser direct-writing mask could introduce the desired micropattern of NaYF 4 : Yb 3+ , Er 3+ thin films, which show uniform distributed green upconversion fluorescence pixel with fine resolution of about 50 μm. The intense upconversion luminescence pattern with high spatial resolution show great application potential in the fields of displays, photodetectors , biological sensors, solar energy converter and commercial anticounterfeiting.
研究领域:
材料科学
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光学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Junshan Hu,Yongqiang Li,Yuxiang Wu,Bin Duan,Keyu Guo,Fengyi Wang,Tong Liu,Wei Jin,Changchun Ding
Herein, a strong red upconversion phosphor of Yb 3+ /Er 3+ co-doped Sc 6 WO 12 was prepared by employing an equivalent substitution approach. When irradiated by 980 nm near-infrared laser, the phosphor emits strong 660 nm red light. The main excitation mechanism for its red upconversion luminescence emission is the energy transfer process, through which the Er 3+ ions is promoted from the 4 I 13/2 energy level to the 4 F 9/2 energy level. In addition, it is noteworthy that the multimode upconversion luminescence phosphor exhibits three different trends upon temperature change, and its upconversion emission integral intensity ratio exhibits a linear relationship with temperature in the range of 298 K–623 K. This special property makes the phosphor promising for applications in optical temperature measurement.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2019
·Vol. 102
·期 12
·7491-7499
·
IF 3.094
Ziyu Liu,Guido Toci,Angela Pirri,Barbara Patrizi,Jinbang Li,Zewang Hu,Jiabei Wei,Hongming Pan,Tengfei Xie,Matteo Vannini,Jiang Li
In this article, 5 at.% Yb:Lu 2 O 3 transparent ceramics were fabricated by vacuum sintering combined with hot isostatic pressing (HIP) posttreatment using co-precipitated nano-powders. The influence of precipitant molar ratio, ammonium hydrogen carbonate, to metal ions (AHC/M 3+ , R value) on the properties of Yb:Lu 2 O 3 precursors and calcined powders was investigated systematically. It was found that the powders with different R value calcined at 1100°C for 4 hours were pure cubic Lu 2 O 3 but the morphologies of precursors and powders behaved differently. The opaque samples pre-sintered at 1500°C for 2 hours grew into transparent ceramics after HIP posttreatment at 1750°C for 1 hour. The final ceramic with R = 4.8 showed the best optical quality with the in-line transmittance of 79.7% at 1100 nm. The quasi-CW laser operation was performed at 1034 nm and 1080 nm with a maximum output power up to 8.15 W as well as a corresponding slope efficiency of 58.4%.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Qijing Zheng,Chunyan Guan,Zhenghuan Wan,Ru Fu,Jinyu Yang
Pure phase orthorhombic Er 3+ and Yb 3+ co-doped La 14 W 8 O 45 up-conversion luminescent materials were successfully prepared by the hydrothermal method combined with calcination treatment. The structures, morphology, and optical properties of the samples were analyzed by X-ray powder diffractometer (XRD), scanning electron microscope (SEM), ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRS), and up-conversion photoluminescence spectroscopy (UPL) with a 980 nm laser. XRD results indicated that the obtained samples are single-phase orthorhombic Er 3+ and Yb 3+ co-doped La 14 W 8 O 45 crystals. SEM results showed that the prepared sample exhibits an irregular and melted polyhedral-like morphology with agglomeration in submicron size of particles approximately 50–200 nm. UV–vis DRS results revealed that the La 14 W 8 O 45 crystal is a direct semiconductor with an optical band gap of 3.84 eV. The prepared Er 3+ and Yb 3+ co-doped La 14 W 8 O 45 crystals exhibit strong up-conversion emission peaks at about 526 nm, 548 nm, and 660 nm under 980 nm laser excitation. The intensity of up-conversion luminescence is affected by the Er 3+ doping concentration, and concentration quenching will be observed due to the cross-relaxation (CR) process when the Er 3+ doping content is above 1%. The pumping power dependence of the luminescence indicated that the up-conversion emissions of samples are excited by a two-photon absorption process. The color coordinates of the samples are located in the green light region.
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 SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Limin Wu,Zeyu Cheng,Shoulei Xu,Wenxia Wu,Yazhao Wang,Huiting Zhang,Zhonghua Zhu,Ninghan Zeng,Bernard Albert Goodman,Wen Deng
High quality optical single crystals of cubic Yb 2.96 Er 0.04 Al 5 O 12 and Y 2.96 Er 0.04 Al 5 O 12 were successfully prepared using the OFZ method. The 980 nm photon absorption intensity by Yb 2.96 Er 0.04 Al 5 O 12 crystal is much larger than that in Y 2.96 Er 0.04 Al 5 O 12 crystal, the transmission of Yb 2.96 Er 0.04 Al 5 O 12 crystal is lower than that of Y 2.96 Er 0.04 Al 5 O 12 crystal, because the density of Yb 2.96 Er 0.04 Al 5 O 12 single crystal (6.604 g/cm 3 ) is larger than that of Y 2.96 Er 0.04 Al 5 O 12 single crystal (4.529 g/cm 3 ). The up-conversion luminescence spectra of the crystals excited by 980 nm laser show several distinct groups of emission peaks at ∼544 and ∼556 nm, as well as ∼650 and ∼667 nm. The peak intensities of the up-conversion luminescence spectrum for the Yb 2.96 Er 0.04 Al 5 O 12 crystal were much higher than those for the Y 2.96 Er 0.04 Al 5 O 12 crystal. Overall, the results of the present study suggest that Yb 2.96 Er 0.04 Al 5 O 12 single crystal may have advantages over Y 2.96 Er 0.04 Al 5 O 12 single crystal for luminescence in solid-state lasers.
研究领域:
光学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Laser & Photonics Reviews
·
2024
·
IF 9.8
Yinghao Wei,Sen Yang,Kaihang Zhu,Linshuo Gao,Liji Wang,Guanying Chen,Ai-Hua Li
Weak luminescence of the small-sized lanthanide-doped nanoparticles has limited their applications long. In recent years, there is a growing interest in luminescence thermal enhancement in small-sized upconversion nanoparticles (UCNPs). The mitigation of surface quenching effects and the improvement of energy transfer (ET) are two convincing explanations for this phenomenon. A systematical investigation on the luminescence dynamics of Yb 3+ is implemented. ET rate and then the proportion of ET increases greatly with rising temperatures in Yb 3+ /Tm 3+ codoped system, while an alternative trend can be summarized in Yb 3+ /Er 3+ one. Based on these findings, therefore it can be concluded that the surface quenching mitigation related to the desorption of water molecules on the surface is a common mechanism of the luminescence thermal enhancement. But ET related to the thermally-activated surface phonons is a special case, it does play a positive role in Yb 3+ /Tm 3+ system. These findings not only explain the upconversion luminescence thermal enhancement in Yb 3+ /Tm 3+ system is more significant but also help to understand thermal enhancement and benefit highly-sensitive temperature probe design.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Dehua Ma,Yifan Wang,Lin Wang,Ying Peng,Yunguang Yin,Shanyue Hou,Luyi Zhu,Xinqiang Wang,Benxue Liu,Guanghui Zhang,Yongshuai Xie,Dong Xu
Ultralow-density (35–60 mg·cm–3) Yb2O3 nanofibrous membranes (YbFMs) with a multilayer structure were successfully prepared for the first time using Yb-acetylacetone coordination polymer as a precursor. Thanks to the high ceramic yield (62.1%) and excellent spinnability of the precursor, the YbFMs exhibited outstanding flexibility, which does not cause damage even when bent or knotted. The tensile strength of the YbFMs was 1.69 MPa, and the maximum elongation could reach 33%. Notably, the YbFMs exhibited robust fatigue resistance, retaining 87.2% of the initial stress even after 500 buckling cycles and preserving 84.75% of the initial stress in compression resilience. Moreover, the YbFMs exhibited flexibility and compressive performance in the temperature range of −196–1350 °C. The thermal conductivity of the YbFMs was 28.9–34.6 mW·m–1·K–1. At a hot surface temperature of 1350 °C, the 6 mm thick YbFMs could reduce the back temperature by about 1070 °C. Thus, YbFMs are expected to be a flexible insulation material at extremely high temperatures.
研究领域:
材料科学
·
能源科学
✓ 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）