JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Wang Dehua,Jiang Longlong,Yu Yang,Lu Ye,Meng Zifei,Bian Rui,Yao Wenle,Zhang Yongcheng,Long Yunze,Wang Xiaoxiong
Traditional inorganic ceramic materials usually exhibit macroscopic rigidity due to the incompatibility to the flexibility mechanism of traditional flexible materials such as sliding of polymer chains or atoms. Recently, new form of nanotechnology has been proposed to be capable of preparing inorganic flexible materials. In this paper, inorganic luminescent material (Ba,Ca)TiO 3 :Pr 3+ was prepared into the flexible form by electrospinning technology, and the macroscopic flexibility of pure inorganic (Ba,Ca)TiO 3 :Pr 3+ was systematic investigated. The crystal grain size was found to grow after higher temperature calcination , which benefits luminescence. However, lowering the calcination temperature will further optimize the flexibility of the membrane. This study shows that fibrous membrane fabrication is an applicable flexible fabrication strategy for inorganic oxides , which provides an important reference for the design of flexible materials.
研究领域:
材料科学
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纳米技术
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发光材料
·
陶瓷
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
P. Velusamy,Shanhu Liu,Ruimin Xing,M. Sathiya,Awais Ahmad,Munirah D. Albaqami,Reham Ghazi Alotabi,Elangovan Elamurugu,M. Senthil Pandian,P. Ramasamy
Due to their superior optoelectronic characteristics and affordable cost, doped few-layered g-C 3 N 4 (FCN) semiconductor nanostructures are attractive for photocatalytic and photoelectrochemical (PEC) water splitting applications. Nano heterostructures composed of Praseodymium (Pr)-doped few-layered graphitic carbon nitrides (FCN) and bismuth oxy iodide (BiOI) are manufactured using thermal condensation and hydrothermal technique in two steps. The inclusion of Pr dopant not only modifies the FCN by increasing its porosity and specific surface area, but also improves electron-hole separation and charge transfer. The metal-free nano heterostructure (Pr: FCN/BiOI) that was created exhibits a strong electron-hole separation. The observed rapid charge transit in a heterojunction results in a low rate of charge recombination. Thus, the produced metal-free nano heterostructure overcomes the barrier of FCN's high photo-charge carrier recombination rate. This study investigates the influence of Pr-doping on the structural, optical, electrical conductivity , and PEC characteristics of produced heterostructures. The addition of Pr dopant to FCN increases its ability to absorb solar light. The photocurrent density of the 1.5 wt percent Pr: FCN/BiOI nano heterostructure is 16.8 times greater than that of the 1.5 wt percent Pr: FCN nanostructure. In comparison to the other Pr-doping doses, it exhibits a high hydrogen evolution reaction (HER) photocurrent density (18.21 mA/cm 2 ) and hydrogen evolution rate (3400 mol h −1 cm −2 ) under solar light irradiation (420 nm). The current work gives significant insight into the optimization of composition and structural features for FCN photoelectrocatalysis with excellent performance.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
Nanomaterials
·
2023
·Vol. 14
·期 1
·2
·
IF 5.3
Dejian Hou,Rui Huang,Yi Zhang,Hongliang Li,Wenxing Zhang,Zhisen Lin,Yanqing Guo,Zewen Lin,Jianhong Dong,Jin-Yan Li
Multi-band emission luminescence materials are of great significance owing to their extensive application in diverse fields. In this research, we successfully prepared a series of Pr3+-doped Ca3Al2O6multi-band emission phosphors via a high-temperature solid-state method. The phase structure, morphology, luminescence spectra and decay curves were investigated in detail. The Ca3Al2O6:Pr3+phosphors can absorb blue lights and emit lights in the 450–750 nm region, and typical emission bands are located at 488 nm (blue), 525–550 nm (green), 611–614 nm (red), 648 nm (red) and 733 nm (deep red). The influence of the Pr3+doping concentration was discussed, and the optimal Pr3+doping concentration was determined. The impacts of charge compensator ions (Li+, Na+, and K+) on the luminescence of Pr3+were also investigated, and it was found that all the charge compensator ions contributed positively to the emission intensity. More importantly, the emission intensity of the as-prepared phosphors at 423 K can still maintain 65–70% of that at room temperature, and the potential application for pc-LED was investigated. The interesting results indicate that the prepared phosphors may serve multifunctional and advanced applications.
研究领域:
材料科学
·
光学材料
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发光与荧光粉
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固态化学
·
光子学
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DOI
高影响因子
Advanced Optical Materials
·
2019
·Vol. 7
·期 24
·1901107
·
IF 7.125
Puxian Xiong,Mingying Peng,Kexin Qin,Feifei Xu,Xingyi Xu
Here, a novel multifunctional phosphor of Li 1− x Ga 5 O 8 : x Pr 3+ is reported. The crystal structure, mechanoluminescence (ML), persistent luminescence (PersL), photoluminescence (PL) and photoluminescence excitation (PLE) are systematically studied. LiGa 5 O 8 emits blue PersL peaked at 437 nm after irradiation by a 254 nm lamp for 10 s, and corresponding PersL can be observed for 30 min by naked eyes. In the same case, the PersL from Li 0.995 Ga 5 O 8 :0.005Pr 3+ covers visible to near-infrared lights (400–1000 nm) which can persist for 120 min. Thermoluminescence analysis shows Pr 3+ doping not only increases the shallower trap (0.73 eV) concentration by at least 20 times but also helps the formation of deeper trap centers (0.87 eV). The differences between ML and PersL spectra reveal the selective effects of mechanical stimuli on the transitions of Pr 3+ ions. In the end, the fabrication of an intelligent PersL quick response code (QR-code) permits optical information write-in after irradiation by a 254 nm lamp and then cryptical information of “SCUT” can be read out by thermal stimulation which shows the potential in information storage. Moreover, the biological tissues penetration experiments and cytotoxicity tests are carried out to display the potential of PersL in bioimaging.
研究领域:
材料科学
·
发光材料
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光学存储
·
生物医学成像
·
智能材料
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Zonglin Lv,Yalin Qin,Yongcheng Zhang,Jingjing Fu,Chaojing Lu
To date there is no report on the photoluminescence property in Pr 3+ /Yb 3+ co-doped or Pr 3+ single doped ferroelectrics Pb(Mg 1/3 Nb 2/3 )O 3 –PbTiO 3 , abbreviated as PMN-PT. This letter presents the efficient upconversion (UC) luminescence in 0.75PMN-0.25PT:1.5%Pr/ y Yb transparent ceramics together with luminescence mechanism. When the transparent ceramics were excited by 980 nm laser, strong visible UC emissions at 491, 529, 539, 623, 649, 685, 710 and 737 nm were detected, besides strong near-infrared down-conversion emissions of Pr 3+ at 1061 nm and of Yb 3+ around 1006 nm. The visible UC emission was found to be a two-photon process and sensitized by Yb 3+ . The intensities of the visible UC emissions saturate at higher pump power above 1.65 W when the Yb 3+ concentration y ≥ 3%. The intensity saturation results from the depletion of ground state population and reverse energy transfer in cross-relaxation way. Relative to the intensities of the red emissions, those of the blue-green emissions decrease remarkably as the Yb 3+ content increases. This interesting phenomenon can be attributed to the higher local symmetry of Pr 3+ sites in the ceramics of higher Yb 3+ content. The various photoluminescence properties and excellent ferroelectric properties make our Pr 3+ /Yb 3+ -doped transparent ceramics promising multifunctional optical luminescence materials.
研究领域:
材料科学
·
光子学
·
铁电材料
·
光学材料
·
发光
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Junping Shi,Lielin Wang,Qibiao Wang,Chao Deng,Xiuqi Pu,Shidi Yao,Liang Jiang,Qiuyi Wang
Present study reveals the effects of varying concentrations of Pr 2 O 3 on the Spectral characteristics of 35PbO-60-xB 2 O 3 -5ZnO-xPr 2 O 3 (x = 0.5–3mol%) glasses, which were prepared using the melt-quench technique. The XRD and Raman results confirm that the glasses possessed the amorphous nature with borate complexes as the main structure units. From the absorption spectrum , the glass has a strong absorbance in the visible and infrared regions. The theoretical and experimental oscillator strengths ( f exp and f c a l ), phenomenological parameters (Ω 2 , Ω 4 , Ω 6 ) of Pr 3+ were calculated using the Judd-Ofelt theory. Strong emissions in the reddish orange region at 600 nm was observed due to the transitions of Pr 3+ ions from 1 D 2 → 3 H 4 at 444 nm excitation. The optimal concentration of Pr 2 O 3 in the glass is 1 mol%, exhibiting the highest photoluminescence intensity and the second longest decay time (microsecond order). The decay time reduction with increasing Pr 2 O 3 content, indicates the presence of resonant energy transfer between Pr 3+ ions. Therefore, the Pr 3+ -dope lead zinc borate glasses could be used for red LED.
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产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 30
·16603-16610
·
IF 2.936
Fangfang Li,Fengyi Wang,Xuan Hu,Baozhan Zheng,Juan Du,Dan Xiao
The detection of nitroaromatic explosives is important due to their strong explosive force and harmfulness in the environment, and for homeland security and public safety. Herein, a phosphorescence CaTiO3:Pr3+@SiO2 nanosensor was successfully developed for the sensitive and selective detection of 2,4,6-trinitrophenol (TNP). The red-emitting phosphorescent chemosensor CaTiO3:Pr3+@SiO2 possessed a long enough phosphorescence lifetime of 0.016 s. The TNP induced phosphorescence quenching process of CaTiO3:Pr3+@SiO2 presented a wide linearity with TNP concentrations ranging from 0.5 to 100 μM, and the detection limit was found to be 20.6 nM. Furthermore, this sensor displayed a high selectivity toward TNP over other structurally similar compounds like 2,4,6-trinitrotoluene (TNT), 2,4-dinitrotoluene (DNT), 4-nitrotoluene (NT), 2,4-dinitrophenol (DNP), 4-nitrophenol (NP) and phenol. This sensing system was successfully used in the test of TNP concentrations in water samples, and showed great potential for practical application.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
·
2017
·
IF 2.446
Chunlong Han,Li Luo,Guoshuai Dong,Wei Zhang,Yinhai Wang
Novel YAG:Ce 3+ , Pr 3+ , Yb 3+ phosphors were synthesized using a high temperature solid state reaction method. The XRD patterns revealed that the obtained samples belong to the single phase YAG. The optical spectra demonstrated that Pr 3+ could be a bridge to facilitate the energy transfer from Ce 3+ to Yb 3+ in the YAG host. Blue light excited Ce 3+ and a yellow emission from Ce 3+ together with a near infrared emission of Yb 3+ was obtained. The effect of Pr 3+ doping on the energy transfer efficiency was explored. When the doping concentration of Pr 3+ increased, the yellow emission intensities of Ce 3+ decreased and the near infrared emission intensity of Yb 3+ increased monotonously. Hence, the efficiency of energy transfer from Ce 3+ to Yb 3+ is enhanced by the addition of Pr 3+ , implying that the YAG:Ce 3+ , Pr 3+ , Yb 3+ phosphors are promising downshifting materials and have the potential to be used in Si-based solar cells.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2022
·Vol. 12
·期 7
·963
·
IF 2.67
Weili Wang,Shihai Miao,Dongxun Chen,Yanjie Liang
Trivalent lanthanides (Ln3+) doped bismuth-based inorganic compounds have attracted considerable interest as promising candidates for next-generation inorganic luminescent materials. Here, a series of K0.3Bi0.7F2.4(KBF) nanocrystalline particles with controlled morphology have been synthesized through a low-temperature aqueous-phase precipitation method. Using KBF as the host matrix, Eu3+, Tb3+, Pr3+, Nd3+, Sm3+,and Dy3+ions are introduced to obtain K0.3Bi0.7F2.4:Ln3+(KBF:Ln) nanophosphors. The as-prepared KBF:Ln nanophosphors exhibit commendable photoluminescence properties, in which multicolor emissions in a single host lattice can be obtained by doping different Ln3+ions when excited by ultraviolet light. Moreover, the morphology and photoluminescence performance of these nanophosphors remain unchanged under different soaking times in water, showing good stability in a humid environment. The proposed simple and rapid synthesis route, low-cost and nontoxic bismuth-based host matrix, and tunable luminescent colors will lead the way to access these KBF:Ln nanophosphors for appealing applications such as white LEDs and optical thermometry.
研究领域:
材料科学
·
纳米技术
·
光学
·
化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Zhaoyang Wang,Pei Wang,Chunyu Bi,Xinxin Zhang,Haitao Yu,Xudong Xiao,Ying Xie
Wastewater containing organic pollutants poses significant risks to both the natural environment and human health, highlighting the urgent need for developing efficient photocatalytic materials. In this study, Pr-doped Bi 4 Ti 3 O 12 nanoflowers with different doping concentrations were synthesized by a one-step hydrothermal method. Density functional theory (DFT) calculations combined with experimental characterization revealed that the introduction of Pr 4f energy levels creates intermediate states within the bandgap, which act as electron trapping centers and prolong the carrier lifetime. Experimental results demonstrated that the 15.5% Pr/Bi 4 Ti 3 O 12 catalyst exhibited the optimal photocatalytic activity for ciprofloxacin degradation, achieving a removal rate of 89.41% within 60 min. Mechanistic investigations revealed that the coexistence of Pr 4+ and Pr 3+ oxidation states facilitates the conversion of O 2 into superoxide radicals (·O 2 − ), which function as one of the predominant reactive species in the catalytic cycle and are responsible for the enhanced photocatalytic degradation efficiency of the material. As a result, Pr doping significantly improves the photocatalytic performance of the catalyst. This work provides further insight into the underlying mechanism of rare-earth doping in photocatalysts.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·Vol. 50
·期 22
·44876-44882
·
IF 5.1
Xiaqing Jiang,Zhangwen Long,Hao Song,Jingjing Li,Junyi Yang,Yuting Wu,Dacheng Zhou,Yong Yang,Qi Wang,Jianbei Qiu
The orange-red phosphor, which combines persistent luminescence and mechanoluminescence , holds significant importance in advanced bioimaging and optical anti-counterfeiting. However, there are relatively few reports on this type of material currently. In this study, doping CaAl 2 Si 2 O 8 : Mn 2+ phosphor with Pr 3+ ions significantly increases the material's defect density. Under X-ray/UV excitation, the sample displays exceptional orange-red persistent luminescence and superior mechanoluminescence. More importantly, the samples exhibit the above properties in all temperature regions (including low temperature, room temperature (RT) and high temperature). Additionally, the material demonstrates excellent tissue penetration capabilities and dual-mode luminescence (persistent luminescence and mechanoluminescence), highlighting its potential for bioimaging and optical anti-counterfeiting applications.
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DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 35
·12137-12146
·
IF 4.39
Weihong Yuan,Ran Pang,Tao Tan,Haiyan Wu,Shangwei Wang,Jiangyue Su,Jiutian Wang,Shengjian Jiao,Chengyu Li,Hongjie Zhang
In this article, we synthesized a series of new warm-white emitting persistent luminescent phosphors by co-doping Zn2+ into Pr3+ activated BaLu2Al2Ga2SiO12, and systematically investigated the effect of Zn2+ co-doping on both their photoluminescence and persistent luminescence properties. Following the removal of UV excitation, the phosphor emits warm-white persistent luminescence consisting of greenish-blue and red emissions originating from 3P0 and 1D2 multiplet electron transitions at the 4f level of Pr3+. The luminescence properties of the Ba1−xZnxLu2Al2Ga2SiO12:Pr3+ phosphors can be modified by changing the content of Ba/Zn in the host, which affects the non-radiative energy flow between 5d1–3P0–1D2 levels and resultantly enhances the intensity of the 4f → 4f transition. Compared with the undoped sample, Zn2+ co-doping can significantly enhance the persistent luminescence intensity of the phosphors in the range of 400–800 nm and reduce the intensity in the UV region. Meanwhile, Zn2+ co-doping can also change the intensity ratio between the greenish-blue and red emissions, and the persistent luminescence color can be tuned from red to warm-white with the increase of Zn2+ concentration. Besides, the Zn2+ ions entering the crystal lattice also enhance the persistent luminescence performance by modifying the defect levels in the phosphor. For the optimized phosphor, bright warm-white persistent luminescence can be observed by the naked eye in the dark after the removal of the excitation source for 4 h. Based on the experimental results, a feasible mechanism was also proposed to reveal the persistent luminescence generation process for the BaLu2Al2Ga2SiO12:Pr3+,Zn2+ phosphor.
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DOI
高影响因子
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