CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yuelong Ma,Chenyang Shao,Lan Wu,Xingcan Li,Ye Tian,Lingwei Zeng,Lili Lu,Boqiang Zhang,Zongcai Wang,Xingzhou Chen,Dongbin Xue,Guoxing Jiang,Yanbo Hui,Shuqi Chen,Daqin Chen
The development of high-quality phosphor ceramics with high photoelectric efficiencies and thermal stabilities is essential for realizing high-power broadband near-infrared light sources . In this study, a series of pure-phase Gd 3 Sc 2 Al 3 O 12 :Cr 3+ near-infrared (NIR) phosphor ceramics (GdScCr NIR-PCs) exhibiting remarkable thermal stability and broadband emission were fabricated for the first time using a vacuum sintering technique. The integrated emission intensity at 423 K is 79.8 % of that at room temperature. The GdSc08Cr exhibits an emission peak at a wavelength of 785 nm, with a full width at half maximum (FWHM) of 116.9 nm under 460 nm excitation. By integrating the GdScCr NIR-PC with a blue light-emitting diode/laser diode (LED/LD) excitation source , the NIR LED prototype achieved a maximum output power of 112.19 mW at 300 mA with a photoelectric conversion efficiency of 13.64 % at 150 mA, and the NIR LD prototype achieved a maximum power output of 484.34 mW at 2.3 A. The operating temperatures of NIR-PCs were 73.1 °C at 300 mA for LED and 90.7 °C at 2.5 A for LD. Moreover, the application of the prepared GdScCr NIR-PCs for fruit and grain detection was performed. These results demonstrate that the prepared GdScCr NIR-PCs possess substantial potential for application in high-power broadband NIR spectroscopy .
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2025
·Vol. 32
·期 7
·1762-1770
·
IF 7.2
Ma Qin,Shi Lin,Ran Baocheng,Ma Tianfeng,Wang Huan,Lu Yongchang
Up to now, “Turn-on” fluorescence sensor exhibits promising potential toward the detection of heavy metal ions, anions, drugs, organic dyes, DNA, pesticides, and other amino acids due to their simple, quick detection, and high sensitivity and selectivity. Herein, a novel fluorescence method of detecting Cr 3+ in an aqueous solution was described based on the fluorescence resonance energy transfer between rhodamine B (RhB) and gold nanoparticles (AuNPs). The fluorescence of RhB solution could be obviously quenched (“off” state) with the presence of citrate-stabilized AuNPs. However, upon addition of Cr 3+ to AuNPs@RhB system, the fluorescence of AuNPs was recovered owing to the strong interaction between Cr 3+ and the specific groups on the surface of citrate-stabilized AuNPs, which will lead to the aggregation of AuNPs (“on” state). At this point, the color of the reaction solution turned to black. Under optimal conditions, the limit of detection (LOD) for Cr 3+ was 0.95 nM (signal-to-noise ratio, S/N = 3) with a linear range of 0.164 nM to 3.270 µM. Furthermore, the proposed method exhibits excellent performances, such as rapid analysis, high sensitivity, extraordinary selectivity, easy preparation, switch-on fluorescence response, and non-time consuming.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Manxing Huo,Ruzhen Zhao,Xiaopeng Jin,Lijuan Liu,Ziwen Ying,Yongming Zhu,Qifeng Wei,Xiulian Ren
Solvent extraction is an effective method for addressing the difficult separation of Cr 3+ and Fe 3+ in sulfuric acid media. Bis(2-ethylhexyl)phosphate (P204) has been shown to extract Fe 3+ from systems where Cr 3+ and Fe 3+ coexist. However, the issue of co-extraction of chromium remains. Considering that 2-ethylhexyl 2-ethylhexylphosphate (P507) and P204 are the same class of extractants, this study proposes the use of P507 to separate Cr 3+ and Fe 3+ . Under optimal conditions, the primary extraction efficiency for Fe 3+ reached 99.65%, with Cr 3+ being co-extracted at only 5.93%, and Al being co-extracted by 8.66%. The co-extracted Al 3+ was removed by a three-stage cross-current scrubbing process. After three-stage counter-current stripping, selective stripping of iron was achieved, leading to the effective separation of Cr 3+ and Fe 3+ . To date, no studies have reported on the role of sulfate ions in the extraction of Fe 3+ by P507. This study for the first time, reveals a new extraction mechanism in which sulfate ions (SO 4 2− ) play a role in the formation of complexes during the extraction process. It also provides a technological foundation for the further recovery of high-purity Cr 3+ and offers valuable insights into the behavior of sulfate ions during the extraction process.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Wenbo Ji,Fengmei Zhu,Yuan Gao,Jianbei Qiu
Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs), a widely used NIR light source, are typically prepared by sealing the NIR phosphor powder and an LED chip with epoxy resin. One issue that NIR pc-LEDs frequently encounter is the aging and deterioration of epoxy resin over time, which leads to self-absorption and a sharp decline in emission efficiency. Here, we report the synthesis of a chemically stable NIR luminescent material composed of Cr3+-doped Ba2NaNb5O15 nanocrystals measuring 10–15 nm, with Cr3+ ions located in the octahedral centers of the nanocrystals. Under 460 nm light excitation, the transparent glass-ceramic exhibited a broadband NIR emission in the range of 600–1400 nm, which originated from the electronic transition of Cr3+ from the excited state of 4T2 to the ground state of 4A2. The emission peak was located at ∼810 nm, the FWHM was ∼230 nm, and the internal quantum efficiency reached ∼0.81%. We constructed a stable NIR pc-LED device using optimized transparent NIR-emitting glass-ceramics and a commercially available blue LED chip, demonstrating its promising application in night-vision lighting. Our study provides a basis for the preparation of transparent glass-ceramic-based NIR pc-LED devices as an improved alternative for solid-state illumination.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science China-Materials
·
2025
·
IF 7.4
Peng Chunli,Tang Baoling,Zhang Xuejie,Molokeev Maxim S.,Zhang Haoran,Lei Bingfu
Near-infrared (NIR) spectroscopy has significantly advanced NIR light sources. However, creating NIR emitters with optimal luminescence properties, high thermal stability, and adjustable emission peaks poses a critical challenge for future smart NIR devices. We introduced a chemical unit cosubstitution strategy by incorporating Ca 2+ and Sn 4+ ions into the garnet structure. Through this approach, Y 3− y Ca y Ga 4.95− y Sn y G 12 :0.05Cr 3+ ( y = 0–1) phosphors were developed by modulating the A&C ligands, resulting in emission centers ranging from 708 to 768 nm. The modified local environment of Cr 3+ accounts for the increased light intensity (2.71 times) and broadening observed. Furthermore, this study investigated the impact of varying Cr 3+ concentrations (Y 2.6 Ca 0.4 Ga 4.6− x Sn 0.4 G 12 : x Cr 3+ ) on the production of high-performance phosphors. Compared with Y 3 Ga 4.93 G 12 :0.07Cr 3+ , the optimized phosphor exhibited exceptional external quantum efficiency (EQE = 34.96%). The luminescence enhancement is attributed to an increase in radiative transitions caused by octahedral Jahn-Teller distortion, whereas the notable thermal stability (91.3% at 423 K) is attributed to the presence of weak electron-phonon coupling (EPC) and oxygen vacancy (O V ) defects. Finally, by combining it with a 450 nm blue LED chip, we constructed a near-infrared phosphor-converted LED (NIR pc-LED) device with superior electroluminescence efficiency (18.8% @ 100 mA), increasing the ultralow quenching rate (< 5% intensity loss after 30 days of operation) and demonstrating remarkable performance in plant lighting applications.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Mingkai Wei,Yiteng Liang,Jinlun Zeng,Tianzhu Zhao,Yanjun Hao,Xuejie Zhang,Wei Li,Haoran Zhang,Bingfu Lei
The performance of near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) is dependent on the performance of the phosphor applied to the LED surface; however, the challenges of low external quantum efficiency (EQE) and insufficient thermal stability of NIR phosphors remain. Herein, we propose a novel nonprimary lattice substitution strategy (Y3+ → Gd3+) to enhance the structural rigidity of Gd1–yAl3–x(BO3)4:xCr3+,yY3+ phosphor. Unlike conventional host-site substitutions, this approach induces compressive strain on the [Al/CrO6] octahedron via a Gd3+/Y3+ size mismatch, thereby increasing bond energy and suppressing electron–phonon coupling. The optimized phosphor emits NIR light in the range of 650–1000 nm under 430 nm excitation, with the thermal stability (@423 K) improving from 73.8% to 92.5%, and the EQE is effectively improved. A prototype NIR pc-LEDs fabricated with a 450 nm chip delivers 40.4 mW output power at 100 mA with 14.7% photoelectric efficiency, demonstrating ultralow quenching rate (<6% intensity loss after 30 days operation). The NIR pc-LEDs was used in butter lettuce cultivation experiments, and the results showed that the growth pattern of butter lettuce changed significantly and the biomass increased significantly (28.9%). In addition, the potential for application in organic detection was demonstrated. This work provides a lattice engineering route to design stable NIR phosphors for multifunctional photovoltaic applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Liwei Zeng,Jiyou Zhong,Wenbin Lin,Weiren Zhao
NIR phosphor-converted light-emitting diode (NIR pc-LED) has attracted many attentions for its promising applications in biomedical imaging, night vision, spectroscopy, and many other fields, while the discovery of broadband NIR phosphors with high external quantum efficiency (EQE) remains a challenge. Herein, a series of efficient and tunable broadband NIR-emitting Ga 1.97-2 x Mg x Sn x O 3 :0.03Cr 3+ phosphors were synthesized via [Mg 2+ -Sn 4+ ] substituting [Ga 3+ -Ga 3+ ] in Ga 2 O 3 :Cr 3+ system. As increase of substituting ratio x , a significant red-shift in the emission spectra from 726 to 793 nm with a full width at half maximum (FWHM) extended from 121 to 167 nm can be observed. All the samples have an EQE above 40% under 450 nm excitation; and the excitation peak in the blue light region remains unchanged, enabling these materials to be efficiently excited by blue LEDs. Finally, a NIR pc-LED device was fabricated by integrating the optimized Ga 1.77 Mg 0·1 Sn 0·1 O 3 :0.03Cr 3+ phosphor on a blue LED chip, which exhibits a high NIR output power of 33.41 mW with a photoelectric conversion efficiency of 12.01% under a drive current of 100 mA. These results indicate that the obtained NIR phosphors may have potential in NIR pc-LEDs applications.
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2021
·Vol. 10
·期 4
·2102229
·
IF 9.926
Leqi Yao,Qiyue Shao,Meiling Shi,Tianqi Shang,Yan Dong,Chao Liang,Jinhua He,Jianqing Jiang
Near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) hold great potential for applications ranging from night vision to non-destructive detection. However, it remains a long-standing challenge to develop NIR phosphors simultaneously with longer-wavelength broadband emissions and higher efficiency. Herein, ultra-broadband Ga 4 GeO 8 :Cr 3+ (GGO:Cr 3+ ) phosphors are developed, with the NIR emission covering 700–1300 nm. Furthermore, tunable emission bands peaking from 835 to 980 nm are achieved simply by varying the Cr 3+ concentration. Particularly, emission maxima (λ max ) of GGO: x Cr 3+ shift from 850 to 900 nm without intensity loss when increasing x values between 0.02 and 0.10. An internal quantum yield of 60% is achieved for GGO:0.02Cr 3+ (λ max ≈ 850 nm, full width at half maximum (FWHM) ≈215 nm). The origin of tunable ultra-broadband emissions of GGO:Cr 3+ is revealed on the basis of structural and time-resolved spectroscopic analysis. The pc-LED fabricated by GGO:0.02Cr 3+ exhibits a maximum NIR output power of ≈56 mW at 400 mA drive current, and its application in high-penetration quality analysis of fruits is also demonstrated. The results indicate that GGO:Cr 3+ phosphors have high promise for practical applications in NIR pc-LED devices.
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Xiao Liang,Qiu-Lan Li,Wen-Bo Zhao,De-Zhi Yang,Ya-Ling Yang,Zi-Tao Zhong
Given the potential risks posed by the toxic heavy metal ion Cr 3+ to environmental and human health, the development of fast, simple, and visible detection methods for Cr 3+ is critical to control its detrimental effects. This study presents a sensitive and selective colorimetric method for Cr 3+ analysis, leveraging the laccase-like activity of Co,Zn@Cu-MOF(V B3 ), which was synthesized via a microwave digestion approach. The usage and proportion of precursors (vitamin B3 and CuCl 2 ) were examined to obtain the material exhibiting the optimal catalytic activity and response to Cr 3+ . The well-designed Co,Zn@Cu-MOF(V B3 ) exhibited remarkable laccase-like activity at pH of 5.8, and can oxidize the colorless substrate (2,4-dichlorophenol) to red product with 4-aminoantipyrine as the chromogenic agent. The findings indicate that Cr 3+ induces a decrease in absorbance at 505 nm. Under optimal conditions, the absorbance was linearly proportional to the Cr 3+ concentration in the range of 0.68–679.25 ng/mL, achieving a detection limit of 0.124 ng/mL. The method also displays robust anti-interference performance against other metal ions, and was successfully applied in the determination of Cr 3+ in water samples, yielding recoveries ranging from 90.2 % to 108.8 %.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Shifang Wang,Mingzheng Sun,Xiaolang Fan,Bowei Liu,Chuangchuang Qiao,Shuang Jing,Xufeng Zhou,Wei Li,Yangbo Wang,Huaiyong Li
Broad band near-infrared (NIR) emitting phosphors activated with Cr 3+ ions hold great potential for diverse applications. Microcrystalline barium gallate powders activated with Cr 3+ were synthesized, and their phase structure, photoluminescence properties as well as their potential uses in luminescence thermometry and plant cultivation, are investigated. It is revealed that Ba 1.3 Ga 12 O 19.3 : Cr 3+ exhibits high efficiency NIR emission in the 650–950 nm range upon blue excitation. At 80 K, the emission is dominated by narrow-peaks resulting from 2 E→ 4 A 2 transition. However, as the temperature rises, thermal coupling between the 2 E and 4 T 2 states leading to increased population of 4 T 2 state, the emission transforms into broad-band. At the same time, a significant decrease in lifetime is observed. This is attributed to the substantial difference in the transition probabilities of 2 E and 4 T 2 states, as well as the initiation of the nonradiative process, specifically the crossover from the 4 T 2 to the 4 A 2 state. Luminescence thermometers based on both luminescence intensity ratio (LIR) and lifetime of Ba 1.3 Ga 12 O 19.3 : 0.45 % Cr 3+ are proposed. High relative sensitivities of 6.78 %·K −1 at 113 K, and above 1 %·K −1 until 293 K is achieved from the LIR-based thermometer, and high values (ca. 1 % K −1 ) over a wide temperature range of 173–573 K are achieved from the lifetime readout.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Jiaojiao Wang,Yanyan Gao,Yuexing Zhang,Dongmei Xu,Zongxin Li,Yifei Su,Fang Wang,Ning Zhang,Daopeng Zhang,Kang Wang,Yuting Chen
A versatile dihydroxylsalicylaldazine-containing fluorene (DHSF) compound was easily prepared through a one-step reaction. DHSF simultaneously exhibited solvent-regulating fluorescent OFF–ON behavior toward Al3+/Cr3+ and a dynamic OFF–ON–OFF fluorescent response toward Fe3+ in different aqueous DMF solutions with multiple absorption–ratiometric signals. These could be mainly attributed to the different binding modes between enol–keto isomers and Fe3+/Al3+/Cr3+, as proved by DFT calculation and IR spectroscopy results. Furthermore, DHSF displayed fluorescent OFF–ON–OFF and absorption–ratiometric dual responses to increasing ClO− amounts. These results, together with the fluorescent ON–OFF changes from the metal displacement of the DHSF–Al3+/Fe3+ system by Cu2+, show that monomolecular DHSF is a versatile chemosensor for sensitively detecting Al3+/Cr3+/Cu2+ and quantitatively analysing Fe3+/ClO− with practical application potential.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 25
·44486-44493
·
IF 5.6
Haonan Huang,Zhijun Wang,Mengjiao Li,Xiaoshuai Zhang,Xuping Han,Hao Suo,Guodong Zhang,Panlai Li
Broadband near-infrared (NIR) phosphors are considered key to smart NIR light sources for next-generation blue LEDs. The excitation modes of a few Cr 3+ -activated phosphors are mainly in the ultraviolet or red-light bands (possibly related to the coexistence of multiple valence states of Cr), and the low blue light absorption rate has a certain hindering effect on commercialization needs. In this work, Li + ion doping reduced the concentration of oxygen vacancies in the material and promoted the reduction of Cr 4+ ions to Cr 3+ , effectively enhancing the excitation intensity of SrGe 4 O 9 :Cr 3+ (I 1 /I 2 :0.59 → 1.19). Moreover, a small-scale shift occurred to the blue excitation peak (441 nm→462 nm), which is crucial for the efficient absorption of the blue light chip excitation light. The doping of Li + ions ultimately resulted in enhancement of the emission intensity of Cr 3+ by 17.2 times, obtaining a phosphor with extremely excellent luminescence efficiency (IQE = 99.6 %). In addition, the integral emission intensity of the phosphor at 423 K was 77.6 % of that at room temperature, demonstrating good temperature stability. The NIR pc-LEDs were fabricated by combining SrGe 4 O 9 :Cr 3+ , Li + phosphor with the blue LED, which can be applied in pigment penetration, blood vessel visualization and night vision, revealing its great potential for application.
✓ 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）