Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Mengjiao Sheng,Juanqin Xue,Guangdong Wu,Yujie Liu,Qiang Bi
Effective use of near-infrared (NIR) light for photocatalysis in the solar full-spectrum remains a major challenge. Herein, LuF 3 : Yb 3+ /Tm 3+ @Lu 6 O 5 F 8 : Yb 3+ /Tm 3+ (LYT@LOYT), which could convert NIR light into UV–visible light, was combined with BiOI to form a novel core-shell structured LuF 3 : Yb 3+ /Tm 3+ @Lu 6 O 5 F 8 : Yb 3+ /Tm 3+ @BiOI (LYT@LOYT@BiOI) upconversion photocatalyst. LOYT shell layer was grown in situ on LYT by high-temperature calcination in air, resulting in a 2.36-fold enhancement of blue light emission from the upconversion luminescent core. The tight core-shell wrapping formed by the solvothermal method achieved an efficient Förster resonance energy transfer (FRET) between LYT@LOYT and BiOI. Meanwhile, the formation of heterogeneous structure also accelerated the separation and transfer of photogenerated electron-hole pairs. As a result, under NIR and Vis-NIR irradiation, the degradation rates of LYT@LOYT(20)@BiOI for bisphenol A (BPA) were 1.24 and 1.11 times of LYT(20)@BiOI, and 1.57 and 1.30 times of BiOI, respectively. The enhanced photocatalytic activity was attributed to the expanded photoresponse range, enhanced upconversion emission, efficient energy transfer process, and excellent electron-hole pairs separation transfer efficiency. h + and ⋅O 2 - were shown to be active species in the degradation process. This work provides a useful reference for the rational design of solar full-spectrum responsive photocatalysts which can efficiently utilize NIR light.
研究领域:
材料科学
·
环境科学
·
光催化
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2019
·
IF 2.687
Xiuna Tian,Hongjian Dou,Lingyuan Wu
Upconversion (UC) luminescent materials have received much attention due to their unique luminescent properties and potential applications in various fields. Yb 3+ /Tm 3+ codoped NaBiF 4 UC material has been successfully synthesized through a solvothermal method. With the excitation of 980 nm laser light, NaBiF 4 :Yb 3+ /Tm 3+ powder show strong UC luminescence. Especially, the near-infrared (NIR) UC emission band of NaBiF 4 :Yb 3+ /Tm 3+ centered at 800 nm is 49 times stronger than the blue emission band. The temperature-dependent UCL properties of NaBiF 4 :Yb 3+ /Tm 3+ were investigated systematically under 980 nm excitation. The results show that all the UC emission peaks of NaBiF 4 : Yb 3+ /Tm 3+ in the region from 300 to 900 nm decrease with the temperature increase except for the emission peak at 697 nm which is positively correlated with temperature. And the UC emissions of NaBiF 4 : Yb 3+ /Tm 3+ exhibits high temperature sensitivity between 303 and 443 K. Therefore, NaBiF 4 : Yb 3+ /Tm 3+ material with strong NIR UCL could be a potential candidate for sensitive temperature sensor .
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 NANOSCIENCE AND NANOTECHNOLOGY
·
2014
·Vol. 14
·期 5
·3726-3730
·
IF 1.339
Guo Xingyuan,Song Weiye,Wang Jianshuo,Shi Feng,Qin Weiping
β-NaYF4:Yb3+, Tm3+/ZnO core/shell nanoparticles (NPs) were synthesized via a high temperature thermal decomposition method. The as-synthesized core/shell NPs were characterized by X-ray diffraction (XRD), transmission electron microscopy
(TEM), and upconversion luminescence spectra (UCL). Under 980 nm laser excitation, the measured intensity of upconversion luminescence (1I6→3H6, 1I6→3F4, and 1D2→3H6)
was different with and without ZnO. During the sample preparations, changing the ratio of the solvent affected the ZnO UV absorption efficiency. The results show that the NIR light can be used as the driving source to excite ZnO, thus extending utility rate to the NIR spectral region and enhancing
the light harvest rate.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2014
·Vol. 14
·期 5
·3722-3725
·
IF 1.339
Song Weiye,Guo Xingyuan,He Guanghui,Qin Weiping
β-NaLuF4:20%Yb,0.5%Tm,x%Gd (x = 10,20, 30) nanocrystals were synthesized by high temperature thermal decomposition method. X-ray diffraction (XRD) show the as-prepared samples are characteristic of a pure β-NaLuF4. Transmission
electron microscope (TEM) investigations indicate the nanocrystals have particle size of ∼85 nm with good monodispersity and well-defined crystallographic facets. Particularly, under 980 nm excitation, upconversion (UC) emissions in the UV range of 270–320 nm were observed in these
nanocrystals, which further prove that β-NaLuF4 is an excellent host for building UV compact solid-state lasers or fiber lasers.
研究领域:
材料科学
·
纳米技术
·
光学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Weichang Li,Qiang He,Jixi Xu,Chongyun Shao,Shiyu Sun,Shaohua Fan,Lili Hu
The efficient NIR-to-NIR upconverter of LiYF 4 :Yb 3+ ,Tm 3+ (simplified as LYF:Yb,Tm) was synthesized by a modified hydrothermal method in this work. The synthesized LYF:Yb,Tm has well controlled morphology of monodisperse micrometer sized octahedrons. XRD pattern confirms its pure tetragonal LiYF 4 structure. The LYF:Yb,Tm exhibits a dominating NIR UC emission at ~793 nm along with relative weak blue and red UC emissions under 976 nm LD excitation. The optimal concentrations of Yb 3+ and Tm 3+ ions for NIR up-conversion (UC) emission are 20 mol% and 0.6 mol%, respectively. The internal UC quantum yield (IUCQY) of this LYF:Yb,Tm in NIR band is tested to be 5.1% at 959 nm LD excitation power density (PD) of 120 W/cm 2 . The UC emission mechanism is discussed based on UC fluorescent behaviors of Yb 3+ and Tm 3+ . The results of fluorescent labeling indicate its potential applications in fluorescent markers, solar cells and 3D flat panel displays .
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 THE AMERICAN CERAMIC SOCIETY
·
2020
·Vol. 103
·期 8
·4203-4213
·
IF 3.502
Guoquan Qian,Guowu Tang,Qi Qian,Yongbao Xiao,Dongdan Chen,Zhonghong Jiang,Zhongmin Yang
Germanate laser glasses have received much attention as a promising host materials for mid-infrared fiber lasers in recent years because of the outstanding infrared transparency, low phonon energy, and high rare earth solubility of such glasses. However, the development of high-performance germanate laser glasses is usually based on intuition and a trial-and-error method, which can involve long experimental periods and high costs, and thus, this approach is highly inefficient. Recently, with proposals for materials genome engineering, the concept of the “glass genome” has grown of interest to us. Herein, the structures of Tm 3+ -doped germanate laser glasses (BaO–GeO 2 and BaO–La 2 O 3 –GeO 2 ) were investigated by Fourier transform infrared spectra (FTIR) and Raman spectra analyses, which revealed that the resulting glass contains similar structural groups to the neighboring congruently melted glassy compounds (NCMGCs) in the composition diagram. What is more, the structure and properties of the resulting laser glasses largely depend on NCMGCs. Then, the glass-forming region, physical properties, and luminescence properties were calculated via the use of NCMGCs in Tm 3+ -doped BaO–GeO 2 binary and BaO–La 2 O 3 –GeO 2 ternary laser glass systems. The calculated results were in good agreement with the experimental results, thus demonstrating that our approach is practical for predicting the glass-forming region, physical properties, and luminescence properties in Tm 3+ -doped BaO–GeO 2 binary and BaO–La 2 O 3 –GeO 2 ternary laser glass systems. This work may provide an effective method to develop Tm 3+ -doped germanate laser glasses rapidly and at low cost.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2022
·
IF 2.988
Yuhong Zhang,Yibin Guo,Xingke Zheng,Pengcheng Wang,Hang Liu
A series of AWO 4 (A = Sr, Ca): Yb 3+ /Tm 3+ /Gd 3+ /Er 3+ phosphors are successfully prepared by solid-state method. In comparison with the samples without Gd 3+ ions, the UC emission intensity of CaWO 4 : 0.5 mol%Tm 3+ /1 mol%Yb 3+ /10 mol%Gd 3+ sample has increased by 104 times (∼475 nm), 71 times (∼655 nm) and 23 times (∼795 nm) due to the shrink of the host lattice with the Gd 3+ ions corporation. Based on the fluorescence intensity ratio (FIR) of non-thermal couple levels(non-TCLs), the temperature sensing characteristics are investigated for AWO 4 (A = Sr, Ca): Yb 3+ /Tm 3+ /Gd 3+ /Er 3+ phosphors. The maximum values of absolute sensitivity and relative sensitivity are 0.09356 K -1 and 1.499% K −1 for CaWO 4 : Yb 3+ /Tm 3+ /Gd 3+ /Er 3+ phosphor. It indicates that the AWO 4 (A = Sr, Ca): Yb 3+ /Tm 3+ /Gd 3+ /Er 3+ phosphors can be applied to develop optical thermometry.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Huining Huang,Huiliang Li,Zeyan Wang,Peng Wang,Zhaoke Zheng,Yuanyuan Liu,Ying Dai,Yingjie Li,Baibiao Huang
In this work, we fabricated NaYF 4 :Yb 3+ ,Tm 3+ @NaYF 4 :Yb 3+ ,Nd 3+ @TiO 2 (Tm@Nd@TiO 2 ) core@shell nanoparticles and investigated their near-infrared (NIR) photocatalytic activities. Comparing to traditional TiO 2 based upconversion (UC) photocatalysts (i.e., NaYF 4 :Yb 3+ ,Tm 3+ @TiO 2 , named Tm@TiO 2 ), Tm@Nd@TiO 2 exhibits enhanced photocatalytic activity under NIR light irradiation. The photocatalytic activity of Tm@Nd@TiO 2 under 980, 808, and 980 + 808 nm laser irradiation is 4.40, 5.84, and 9.83 times as high as that of Tm@TiO 2 under only 980 nm irradiation, respectively. The ethylene degradation rate of Tm@Nd@TiO 2 under 980 + 808 nm laser irradiation is 6.4 times as that of Tm@TiO 2 . The photocatalytic activity of Tm@Nd@TiO 2 under visible + NIR irradiation is even comparable with (∼2/3) that under UV light irradiation during Rhodamine B (RhB) degradation. The enhanced photocatalytic activity of Tm@Nd@TiO 2 can be attributed to the stronger light absorption in NIR region ascribed to Nd 3+ , lower water absorption and the enhanced UC emission of Tm@Nd with unique core@shell nanostructures. This work can provide a possible route to improve the NIR photocatalytic activity and stimulate the applications in many other fields.
研究领域:
材料科学
·
光催化技术
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2020
·Vol. 13
·期 10
·2803-2811
·
IF 8.183
Zhang Ling,Li Xiaodan,Wang Wang,Zhao Xu,Yan Xu,Wang Chenguang,Bao Haoqiang,Lu Yang,Kong Xianggui,Liu Fengmin,Liu Xiaomin,Lu Geyu
LiErF 4 was commonly used as a dipolar-coupled antiferromagnet, and was rarely considered as a luminescent material. Herein, we achieved the strong red upconversion emission of LiErF 4 simply by an inert shell coating, i.e., LiErF 4 @LiYF 4 . Owing to the unique and intrinsic ladder-like energy levels of Er 3+ ions, this LiErF 4 core-shell nanostructures present red emission (∼ 650 nm) under multi-band excitation in the near-infrared (NIR) region (∼ 808, ∼ 980, and ∼ 1,530 nm). A brighter and monochromic red emission can be further obtained via doping 0.5% Tm 3+ into the LiErF 4 core, i.e., LiErF 4 : 0.5% Tm 3+ @LiYF 4 . The enriched Er 3+ ions and strong monochromic red emission natures make LiErF 4 : 0.5% Tm 3+ @LiYF 4 nanocrystals very sensitive for trace water probing in organic solvents with detection limit of 30 ppm in acetonitrile, 50 ppm in dimethyl sulfoxide (DMSO), and 58 ppm in N , N -dimethylformamide (DMF) under excitation of 808 nm. Due to their superior chemical and physical stability, these nanoprobes exhibit excellent antijamming ability and recyclability, offering them suitable for real-time and long-term water monitoring.
研究领域:
材料科学
·
分析化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2014
·
IF 2.291
Xingyuan Guo,Changfeng Chen,Shengyan Yin,Weiye Song,Feng Shi,Weiping Qin.
In this work, the effects of NaYF 4 :Yb 3+ , Tm 3+ (NYT) structure on the near-infrared light (NIR) photocatalysis performance of ZnO were investigated. α-NYT/ZnO nanocomposites (NCs) and β-NYT/ZnO NCs were fabricated by a high temperature decomposition reaction method. The prepared NCs were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), UV–vis spectroscopy, Raman spectroscopy, and photoluminescence spectra (PL). The NIR photocatalytic activities of the synthesized α- and β-NYT/ZnO NCs were studied by the degradation of Rhodamine B. The differential photocatalytic activities between of α- and β-NYT/ZnO NCs are believed to be correlated to the effects of α- and β-NYT on the oxygen vacancies and exposed crystal face of ZnO.
研究领域:
材料科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 2
·596-605
·
IF 2.936
Juan Yi,Zong-Yan Zhao,Yu-An Wang
Compound solid solutions have attracted intensive attention due to their adjustable structure, electronic structure, and optical properties. Despite tremendous advances in compound solid solution preparations, combining a rare metal compound and a bismuth compound with the same crystal phase by forming a compound solid solution is still challenging but fascinating. For example, RE1−xBixVO4 with a zircon-type structure exhibits tunable band gaps and photoluminescence performance with varying RE compositions. Herein, Yb1−xBixVO4 solid solutions with continuous monophasic phase prepared by a facile synthesis strategy that is combined with co-precipitation and hydrothermal methods are reported. By doping a small amount of Tm3+, YbxBi1−xVO4 solid solutions can achieve a broad range up-conversion photoluminescence from UV-light to NIR-light. Combined with DFT calculations, the underlying mechanism of experimental observations is explained. In these up-conversion processes, the existence of Tm3+ is an essential factor. In particular, the NIR-to-UV up-conversion photoluminescence of YbxBi0.98−xVO4: 2 mol% Tm3+ solid solution is very interesting and a worthy phenomenon for further studies. As such, designing compound solid solutions may provide a new avenue for controllable up-conversion efficiencies in semiconductor nanocrystals and also a novel insight into the rational tunable up-conversion process for applications in biological labeling and imaging.
研究领域:
材料科学
·
光学
·
理论计算
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xiaohong Li,Jiming Dai,Xiaozhen Zhang,Huafeng Liu,Chengzhi Zhou,Renhua Chen
Non-rare earth ion-activated Yb 3+ -rich fluoride matrix luminescent materials exhibit higher absorption efficiency under near-infrared (NIR) laser excitation, and are more suitable for upconversion (UC) photoluminescence and optical heating applications. These materials are highly promising fluorescent self-labeling nano-heaters. In this work, Bi 3+ -codoped β-NaYbF 4 :Tm 3+ UC nanomaterials were synthesized by combining the hydrothermal reaction with the molten salt method. The effects of Bi 3+ doping on the crystalline phase composition, micromorphology, upconversion luminescence (UCL) properties, spectral characteristics , and optical heating performance of the synthesized materials were investigated in detail. The co-doping of 5–20 mol% Bi 3+ was found to significantly enhance the near-infrared (NIR) UCL intensity of NaYbF 4 : Tm 3+ . In particular, t he sample doped with 15 mol% Bi 3+ emitted nearly pure 801 nm monochromatic near-infrared light under 980 nm optical excitation , and its I NIR /I Blue ratio increased dramatically from 0.97 without Bi 3+ doping to 1599. This material exhibited efficient photothermal conversion capability, and the center temperature of the sample can reach ∼147.6 °C under 10 s laser irradiation, achieving a high photothermal conversion efficiency of 129.53 °C W −1 , together with excellent photothermal conversion stability. The mechanism behind the enhanced NIR emission of Bi 3+ -doped nanomaterials was also elucidated based on the energy level transition strategy.
研究领域:
材料科学
·
纳米技术
·
光学
·
发光学
·
光热治疗
✓ 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）