Inorganic Chemistry Frontiers
·
2023
·Vol. 11
·期 1
·172-185
·
IF 7
Kejie Li,Mengmeng Dai,Zuoling Fu,Zhiying Wang,Hanyu Xu,Rong Wang
Fluorides have garnered tremendous attention in rare-earth-doped fluorescent probes owing to their low phonon energy and excellent optical transparency. However, the latest generation of fluorides, LiYF4, is plagued by extremely complex and uncontrollable synthesis methods, which greatly restricts its further exploration and application. Herein, a straightforward one-step method for the synthesis LiYF4:Ln3+ with micron-sized cones and nano-spheres is reported. Astonishingly, self-sensitized luminescence was achieved under multi-wavelength excitation when Er3+ was singly doped. LiYF4:Yb3+,Er3+ demonstrated superior luminescence intensity to those of commercial green phosphors (NaYF4:Yb3+,Er3+); this ultra-efficient photoluminescence was confirmed from the crystal structure, electronic band properties, morphological analysis and Debye temperature calculations. Further, by constructing cross-relaxation between the Ce3+ and Er3+ ions (4I11/2 + 2F5/2 → 4I13/2 + 2F7/2), the specific four-peak emission (SFPE) intensity of Er3+ in NIR-IIb was significantly increased, further enhancing the relative sensitivity of thermally coupled temperature sensing based on SFPE. Subsequently, non-thermally coupled temperature sensing based on SFPE was also achieved through the construction of phonon-assisted energy transfer between Ho3+ 5I6 and Er3+ 4I13/2. In summary, this paper not only puts forward theoretical and experimental arguments for the use of LiYF4 to replace the conventional NaYF4, but also substantiates the extraordinary prospects of LiYF4 as a temperature-sensitive fluorescent probe in nanomedicine.
研究领域:
材料科学
·
纳米医学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yongjin Chen,Yuanmin Zhu,Abbas Nasir,Renhong Liang,Ping Liao,Liwen Zhu,Songbai Hu,Shusheng Pan,Shanming Ke,Ren-Kui Zheng,Mao Ye
Piezocatalysis has emerged as a green and efficient technology to address widespread environmental challenges and public health concerns. However, scalable fabrication of high-performance, cost-effective piezocatalysts remains challenging. Herein, we propose a facile strategy utilizing rare-earth element doping to significantly enhance the piezocatalytic performance of BaTiO 3 ceramic powder synthesized via solid-state sintering. The Er-doped BaTiO 3 demonstrates exceptional RhB dye degradation with a rate constant of 257 × 10 −3 min −1 , representing a 4.9-fold improvement over pristine BaTiO 3 and surpassing reported lead-free perovskite piezocatalysts. Remarkably, even at ultralow piezocatalyst loading (2.5 mg 1 mol% Er-BaTiO 3 in 5 mg/L RhB), the system maintains a high reaction rate constant of 241 × 10 −3 min −1 . This performance enhancement originates from Er 3+ -induced polarization intensification, oxygen vacancy proliferation, and charge carrier density elevation. Our work establishes an effective strategy for developing high-efficiency piezocatalytic materials with promising applications in wastewater remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Haixia Zheng,Xianju Zhou,Siyu Li,Li Li,Yan Deng,Jiaju Huang,Yan Yan
A series of MgMoO 4 : x%Er 3+ ( x = 0, 1, 2, 3, 4, 5) phosphors were synthesized by high temperature solid-state reaction. The doping concentration of Er 3+ was optimized, and the thermometric properties of the phosphors were investigated based on the thermally coupled energy levels of Er 3+ ( 2 H 11/2 and 4 S 3/2 ) via the luminescence intensity ratio (LIR) technology. The absolute sensitivity (S A ) and relative sensitivity (S R ) of the samples were investigated with the maximum S R being 0.83% K −1 . To maintain the electrical neutrality of the phosphors and reduce lattice distortion of the hosts, a certain amount of charge compensators (Li + , Na + , K + ) were introduced into the phosphors. The luminescent intensity of the phosphors was enhanced greatly, and the thermometric properties were improved slightly with the maximum S R at 0.89% K −1 by the charge compensators.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2024
·Vol. 11
·期 19
·6536-6548
·
IF 6.1
Wen Song,Kaiwen Zhang,Xiaoyi Dong,Liang Xu,Yongjin Li,Rui Hu,Zhaoyi Yin,Zhengwen Yang,Jianbei Qiu,Zhiguo Song
Realizing efficient long-wavelength near-infrared (NIR) emission of Cr3+ ions is still a challenge in spinel-based phosphors due to the limitations of strong crystal fields. Here, we propose three design strategies for obtaining weak crystal fields in spinel-type crystals, and report for the first time designed Cr-activated LiZnNbO4 (LZNO) crystals with unique weak crystal fields and application of an NIR enhancement strategy via heterotopic and heterovalent doping with trivalent rare earth ions. Under irradiation with 468 nm blue light, the phosphor presents ultra-wideband NIR emission centered at 800 nm covering the region of 650–1300 nm, which is attributed to the larger radius, high valence state of cations and the low symmetry of octahedral sites in the LZNO spinel. Supported by XRD refinement, XPS analysis, and density functional theory (DFT) calculation results, it was shown that when Er3+ ions are designedly doped with the Zn2+ sites of the spinel crystals, effective promotion of the valence state transformation of Cr4+ to Cr3+ in the LZNO:Cr3+ system is achieved by defect charge compensation, and this enhances the NIR emission by nearly 3 times. The results of this work not only enrich the material family of Cr3+-activated NIR emitting phosphors, but also offer a novel and simple method for improving the luminescence efficiency of Cr3+-activated phosphors.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2024
·
IF 8
Changhe Hu,Xiao Li,Wenfeng Xie,Jie Liu,Huhui Fu,Yaning Zhang,Jingbing Lu,Qi Xiong,Yuanqi Qian,M. Liu
Alkaline zirconium fluorides (A x Zr y F x+y , A = Li, Na, and K), featuring unique crystallographic structures, have recently emerged as a class of attractive hosts for fabricating lanthanide (Ln 3+ )-doped upconversion nanocrystals (UCNCs) that exhibited distinct morphology, upconversion luminescence (UCL) performance, and physicochemical property. In this paper, for the first time the controlled preparation of Yb 3+ /Er 3+ -doped UCNCs is reported based on the trigonal Cs 2 ZrF 6 host, leading to tunable morphology and size of the resulting UCNCs by varying the reaction temperature and time. By further incorporating Na + ions into the Cs 2 ZrF 6 crystal lattice, sub-10 nm Yb 3+ /Er 3+ /Na + tridoped UCNCs with highly improved crystallinity and thus greatly enhanced UCL intensity are obtained. Moreover, these resulting UCNCs display abnormal thermal enhancement of UCL over a temperature range from 333 to 493 K, enabling the fabrication of supersensitive luminescent nanothermometers for temperature sensing. Based on the luminescence intensity ratio of two nonthermally coupled levels (i.e., 4 F 9/2 and 2 H 11/2 ) of Er 3+ , the as-prepared Cs 2 ZrF 6 :Yb/Er/Na UCNCs exhibit an extremely large absolute sensitivity of 177.3% K −1 and a considerably high relative sensitivity of 1.52% K −1 at 333 K. These results unambiguously demonstrate that Cs 2 ZrF 6 is a suitable host material for preparing small-sized Ln 3+ -doped UCNCs as nanothermometer for high-performance ratiometric temperature sensing.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Xi Chen,Yuexiao Pan,Yihong Ding,Hongzhou Lian,Jun Lin,Liyi Li
The quest for efficient and tunable luminescent materials has been at the forefront of research in the fields of chemistry and materials science. This work delves into the investigation of the luminescence properties of Er3+ ions triggered by 1% Te4+ in the environmentally benign perovskite Cs2NaYbCl6 (CNYC) crystals, aiming to enhance their efficiency and tune the luminescence color. The ratio of the green (2H11/2, 4S3/2–4I15/2) to red (4F9/2–4I15/2) emissions of Er3+ can be freely tunable by varying the concentration of Er3+ and producing the defects induced by codoping Te4+. The calculations reveal that the multiexcitonic excitations of Er3+ stem from f–f (4I15/2–4G11/2, 2H9/2) rather than d–f transitions. The broadened excitation, tuning of color, and enhancement of efficiency achieved in the luminescence perovskite crystals Cs2NaYbCl6:Te4+, Er3+ (CNYC:Te4+,Er3+) presents promising opportunities for the development of advanced optoelectronic devices with superior performance. Moreover, our investigation demonstrates the tunable luminescence response of CNYC:Er3+ to temperature variations, offering potential applications in temperature sensing.
研究领域:
材料科学
·
光学
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ECS Journal of Solid State Science and Technology
·
2016
·Vol. 5
·期 9
·R137
·
IF 1.65
Wenjuan Bian,Yushuang Qi,Xuhui Xu,Dacheng Zhou,Yong Yang,Jianbei Qiu,Xue Yu
The influence of the introduction of Li+ ions on the upconversion (UC) properties of KLu2F7:Yb3+, Er3+ nanocrystalline has been investigated in detail. It is found that the UC emission intensity of 10 mol% Li+ ions doped KLu2F7:Yb3+, Er3+ nanocrystalline is enhanced about 13 times in comparison with that of Li+-free sample. Under the excitation of 980 nm laser diode (LD), a significant improvement of the green to red emission ratio (GRR) in the 10 mol% Li+-doped sample is observed by increasing pump power density. Li+ ions could occupy the cationic sites or the interstitial sites in the KLu2F7 host matrix, which probably eliminate the defect states via the charge compensation and tailor of the crystal field, leading to the promotion of the UC emission efficiency. Thus, the introduction of Li+ ions provides new opportunities for enhancing the scope of applications of Yb3+, Er3+ doped KLu2F7 nanocrystalline ranging from infrared solar cells to volumetric multiplexed bio-probe.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2024
·
IF 4.2
Xuyan Xue,Changshuai Gong,Sihan Yang,Qian Zhang,Jian He,Xuejiao Wang,Ji-Guang Li
Self deep red emission was found for the first time in NaLaCaWO 6 double perovskite which was synthesized via solid-state reaction, and the luminescence was effectively enhanced and regulated via Er 3+ doping. A comprehensive analysis of the calcination atmosphere dependent photoluminescence, X-ray photoelectron spectroscopy, and electron paramagnetic resonance revealed that the deep red luminescence is particularly related to oxygen defects of oxygen interstitials. The plant growth lighting and the optical thermometry performance of the materials were systematically investigated. Under 360 nm or 502 nm excitation, the pristine NaLaCaWO 6 exhibits deep red emission at 690 nm that nicely matches the photosensitive pigment (P FR ) essential for plant growth. The deep red luminescence of NaLaCaWO 6 was 230 % increased by Er 3+ doping. Moreover, deep red emission of the host and green emission of the Er 3+ shows extinguished different temperature depend luminescence behavior, and dual-mode optical thermometry with ultra high relative sensitivity ( S r ) was built based on the materials. Remarkably, the maximum S r based on the fluorescence intensity ratio (FIR) mode reached 3.84 % K −1 (498 K), and maximum S r is as high as 13.1 % K −1 (548 K) when based on the fluorescence lifetime (FL) mode. The results indicate that the NaLaCaWO 6 :Er 3+ phosphor shows promising potential application in the field of plant growth and optical temperature sensing.
研究领域:
材料科学
·
光学
·
植物学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2014
·Vol. 3
·期 2
·382-389
·
IF 0
Yike Fu,Siyu Gong,Xiaofeng Liu,Gang Xu,Zhaohui Ren,Xiang Li,Gaorong Han
Ferroelectric oxides with excellent electrical, mechanical and optical multifunctions play a vital role in future microdevices with diverse applications in energy, sensors and actuators. A series of Er doped PbZr0.52Ti0.48O3 (PZT:Er3+) nanofibers with tunable upconversion photoluminescence (PL) properties were successfully synthesized via a sol–gel based electrospinning process. By controlled crystallization, PZT:Er3+ nanofibers evolve from a polycrystalline to a single-crystalline-like structure, resulting in a remarkable increase in the visible upconversion emission intensity. It was uncovered that Er3+ doping site in PZT shifts from B site to A site with increase in crystallinity and crystal size. In addition, remarkable enhancement in red emission is observed with increased Er3+ doping concentration, which facilitates the modulation of emission colour from green to orange. Combined with the excellent ferroelectric properties of PZT, such spectral tunable PZT:Er3+ nanofibers are considered as a promising multifunctional candidate for integrated electro-mechano-optical devices.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
DOI
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2022
·
IF 6.76
Jie Huang,Xuhua Ye,Wenjun Li,Anqi Shi,Xini Chu,Ziwen Cao,Chao Yao,Xiazhang Li
Developing low cost and efficient strategy to eliminate volatile organic compounds (VOCs) are quite urgent and challenging. Herein, CeO 2 nanoparticles co-doped with Yb 3+ and Er 3+ were immobilized on attapulgite clay (ATP) for photothermal catalytic oxidation of toluene. The CeO 2 :Yb 3+ , Er 3+ /ATP exhibited outstanding catalytic activity with low T 90 of 295 °C (temperature at 90% degradation), satisfactory stability and highly water resistance. The enhanced photothermal catalytic performance can be attributed to the optimal introduction of Yb 3+ and Er 3+ , which promoted the up-conversion of near-infrared light (NIR) to visible light increasing the light utilization. The defects caused by Yb 3+ /Er 3+ doping facilitated the adsorption of O 2 , while the active oxygen species generated from the defects and the photoinduced reactive species not only favored the oxidation of toluene in photothermal catalytic process, but also accelerated the reoxidation of reduced catalyst. Notably ATP support provided large specific surface area and abundant adsorption sites for toluene molecules to promote the deep oxidation and hindered the deactivation of catalysts caused by the accumulation of intermediates. In-situ DRIFTS test revealed that the alkoxide and benzoate appeared as the main intermediates, which can be deeply oxidized under light irradiation. Current work provides a new alternative for photothermal catalytic degradation of VOCs.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Qingsong Luo,Yan Chen,Changhao Feng,Shuang Gao,Tianyu Lan,Qiyuan Fu,Runduo Teng
For applications in environmental protection, industrial production, and personal health monitoring by breath exhalation, the sensitive and selective detection of n-butanol is of extreme importance. An n-butanol gas sensor has been developed utilizing LaFeO 3 nanofibers doped with Er 3+ by an electrospinning technique. Compared to the pure sample, the gas sensor shows an improved response of 58.97 to 30 ppm n-butanol, which was boosted by 5.99-fold due to the smaller average grain sizes (21.2 nm), porosity of the nanofiber, and abundant chemical-absorbed oxygen species (38.5%) at an Er doping level of 3 at%. It has excellent selectivity to n-butanol, a fast response/recovery time (17 s/27 s), superior stability during 30 days, and a low detection limit (100 ppb), which indicates that Er-doped LaFeO 3 nanofibers have excellent sensing capabilities for real-time n-butanol detection.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2022
·Vol. 10
·期 21
·2201182
·
IF 10.05
Keming Zhu,Zhiying Wang,Hanyu Xu,Zuoling Fu
Lead halide perovskites have been very promising for versatile optoelectronic applications, whereas the inherent toxicity and instability of lead halide restrict its wide application. Herein, a kind of high-performance multifunctional phosphor is designed based on heavy concentration Er 3+ -activated lead-free double perovskite Cs 2 NaBiCl 6 (CNBC), which realizes the self-sensitization of Er 3+ ions and emits high-brightness pure green emission upon dual near-infrared (dual-NIR) excitation. The luminescence properties can be further optimized by adding sensitizers (Yb 3+ /Nd 3+ ). Interestingly, the emission intensity of the green region is heightened by 212-fold after Yb 3+ ions doping, which is 40 times higher than that of the current popular phosphors (α-NaYF 4 :2%Er 3+ ,18%Yb 3+ ). Meanwhile, the temperature sensing properties of the thermally coupled levels (Er 3+ : 2 H 11/2 , 4 S 3/2 ) in Cs 2 NaBiCl 6 :40%Er 3+ are also investigated systematically based on the luminescence intensity ratio principle, and the maximum relative sensitivity is calculated to be as high as 1.27% K -1 (980 nm) and 1.57% K -1 (808 nm). Fortunately, the thermal stability and the performance for temperature readout of the studied phosphors are still maintaining a high level after doping sensitizers. The insights provided by this work will broaden the scope of lead-free halide double perovskites in the fields of luminescence and thermometry.
研究领域:
材料科学
·
光学工程
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）