ACS Applied Optical Materials
·
2024
·
IF 0
Zhiwei Wang,Qiuying Wang,Qin Liu,Suwit Suthirakun,Wongsathorn Kaewraung,Peng Jiang,Hang Zhao,Xin Xin,M. A. Subramanian
Blue pigments and blue glazes play crucial roles in our daily life. Ongoing research into blue pigments aims at environmentally friendly compositions with a lower cost. In this work, Co-doped BaAl2Si2O8 pigments were synthesized by a solid-state method. The blue color of the pigments is due to the 4A2(4F) → 4T1(4P) transitions allowed by doped Co2+ in the tetrahedral coordination of the structure. The pigments exhibit excellent stability under both acidic and alkaline conditions. When combined with transparent glazes, BaAl2–xCoxSi2O8 demonstrates satisfied compatibility, resulting in blue glazes with a significant reduction in Co content compared with existing formulations. Furthermore, BaAl2–xCoxSi2O8 blue glazes possess a simple production route, commendable color performance, and cost-effectiveness.
研究领域:
材料科学
·
无机化学
·
环境科学
✓ 已验证
DOI
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhiwei Xia,Yuhan Wang,Rujun Yang,Mengdi Xu,Cunjian Lin,Zhongyuan Li,Ying Lv,Xiaopeng Chi,Shihai You
The interstitial site engineering that purposely creates interstitial luminescent centers in suitable hosts has become an intriguing strategy in designing novel inorganic phosphors. However, effectively tuning the photoluminescence of interstitial activators remains tough challenging at this stage. Here, we demonstrate the effective modulation of interstitial luminescence in inorganic phosphor. In detail, the blue emission band ( λ em = 446 nm) of interstitial Eu 2+ doped α -cristobalite (SiO 2 :Eu 2+ ) is largely enhanced and broadened via a partial, aliovalent substitution of Si 4+ by Al 3+ . After introducing Al 3+ ions into SiO 2 lattice, the full width at half maximum of the blue emission band increase from 59 to 76 nm with a triple growth in quantum efficiency (10.82% → 35.56%). Moreover, the thermal stability improves significantly with a high emission retention of 60% at 325 °C (SiO 2 :0.06Al 3+ ,0.005Eu 2+ ), far higher than that of the parent SiO 2 :0.005Eu 2+ (30%). Encapsulating blue-emitting SiO 2 :Al 3+ ,Eu 2+ along with two commercial green and red phosphors on an ultraviolet LED chip ( λ em = 375 nm), a white LED device with high color rendering index (Ra > 90) was successful fabricated, showing the great potential of this phosphor for achieving high-quality white LED lighting. This study not only provides a promising bule emitter but also sheds light on modulating interstitial luminescence properties in inorganic phosphors.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
LUMINESCENCE
·
2024
·Vol. 39
·期 3
·e4702
·
IF 3.2
Yuyu Guo,Jiancheng Wang,Lili Zhang,Junkai Wang
Tannic acid (TA), as a stabilizing agent, was successfully utilized to establish blue-emitting copper nanoclusters (TA-Cu NCs) on the basis of a facile chemical reduction preparation method. Characterization results proved successful synthesis of TA-Cu NCs with uniform size and excellent stability. TA-Cu NCs exhibited a blue emission wavelength at 431 nm when excited at 364 nm. Interestingly, the as-prepared TA-Cu NCs were selectively quenched by furazolidone based on static quenching. In addition, this analysis platform for furazolidone detection had an excellent linear range from 0.5 to 120 μM with a detection limit of 0.074 μM ( S/N = 3). Furthermore, the accuracy of this sensing method was successfully confirmed by detecting furazolidone in bovine serum samples, indicating that TA-Cu NCs had bright application prospects.
研究领域:
材料科学
·
分析化学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2020
·
IF 4.825
Dan Zhang,Xiangting Zhang,Zhengce An,Rujia Dong,Zhan Shi,Yanhua Song,Haifeng Zou
Here, the crystal structure, phase analysis, site occupancy, and luminescence properties of NCMP:Eu2+,Tb3+,Mn2+ have been studied for the first time. Under 335 nm ultraviolet excitation, the NCMP:Eu2+ phosphors show narrow-band blue emission. In addition, we discuss the reason for a continuous red shift for the emission spectra of NCMP:xEu2+ by raising the x value. The efficient ET processes of Eu2+ → Tb3+ and Eu2+ → Mn2+ were investigated by the luminescence spectra and decay curves. The ET efficiencies reach 92.58% at y = 0.15 for NCMP:0.01Eu2+,yTb3+ and 99.85% at z = 0.15 for NCMP:0.01Eu2+,zMn2+ phosphors, respectively. The efficient energy transfer processes greatly improve the quantum efficiency, luminous intensity, and thermal stability. Bright green and red emissions can be realized through changing the related ratio of Eu2+, Tb3+, and Mn2+. In addition, the excellent performance of the prepared white LED lamps utilizing a 385 nm chip combined with our prepared NCMP:Eu2+,Tb3+/Mn2+ phosphors indicates that NCMP:0.01Eu2+,yTb3+ and NCMP:0.01Eu2+,zMn2+ phosphors can be potential green and red phosphors for white LEDs.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 25
·9636-9643
·
IF 8.067
Kuangnan Lyu,Enhai Song,Zhiguo Xia
Doping engineering in lead-free all-inorganic halide perovskites plays an important role in their performance modulation for emerging photonics applications. Benefiting from the weak electron phonon coupling effect, and the distorted site occupied by Eu2+, chloride perovskite phosphor KCaCl3 : Eu2+ is prepared and demonstrated herein, which shows high-efficiency (internal quantum efficiency, IQE = 96.1%) blue emission peaking at ∼430 nm as well as good thermal stability (74%@ 423 K of the initial integrated intensity at 298 K). This phosphor also has high radiation luminescence intensity (∼7.1 times that of commercial Lu3Al5O12 : Ce3+) upon X-ray excitation and a low detection limit (483.5 nGyair s−1), exhibiting good potential in X-ray detection and imaging. This work provides new insights into the design of Eu2+ activated halide perovskite luminescent materials for versatile optoelectronic applications.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2021
·Vol. 9
·期 19
·2100689
·
IF 9.926
Ruiling Zhang,Zhongyi Wang,Xin Xu,Xin Mao,Jin Xiong,Yang Yang,Keli Han
Halide double perovskites have been regarded as promising alternatives to famous lead halide perovskites in the field of luminescent materials. However, the low-emission efficiency of pristine ones and the lack of efficient blue emitters remain considerable obstacles for their applications in light-emitting devices. Here, an air-stable, all-inorganic Sc-based double perovskite Cs 2 NaScCl 6 is reported, which exhibits strong blue emission peaking at 445 nm with an averaged quantum yield of 29.05% (the highest reported value for pristine halide double perovskites). The rare-earth double perovskite also shows excellent stability against heat and irradiation. Bulk perovskite Cs 2 NaScCl 6 can be an effective host to incorporate Mn 2+ ions, yielding interesting tunable dual broadband emission, slightly redshifted blue emission (450 nm) from the host and red emission (635 nm) from Mn 2+ d–d transitions. These findings present a new direction toward the design of high-efficiency, stable, and environmentally friendly perovskite light emitters.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2024
·
IF 3.8
Ping-guo Jiang,Xiong-gang Lu,Wang-jun Peng,Hong Liu,Yao Zhu,Cai-song Yan,Jing-rong Zhao
This study investigates the structural evolution of blue tungsten reduction products when exposed to hydrogen under controlled water vapor partial pressures. The reduction of WO₂.₉ was achieved through hydrogen atom diffusion at 1050 °C. The Results indicate that, at low water vapor partial pressure, the reduction process of blue tungsten initiates on the surface and progresses inward, creating surface cracks on the clusters. These cracks enable water vapor to interact with the reduced tungsten (W) at their base, leading to the formation of needle-like WO₂.₇₂ phases that grow outward. Under high water vapor partial pressure, the morphology of the acicular WO 2.72 phase changes to a stacked structure. Additionally, W-OH bonds were identified in the reduction products, with the WO₂.₇₂ growth angles observed at approximately 12° relative to the tungsten particles, closely matching the interfacial model prediction of 13.41°. The results of this paper will provide theoretical support for the structural evolution of intermediate products during hydrogen reduction of blue tungsten.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Qiuying Wang,Zhiwei Wang,Menghang Qi,Hang Zhao,Xin Xin,Anjali Verma,Theeranun Siritanon,Arthur P. Ramirez,M.A. Subramanian,Peng Jiang
The severe urban heat island effect emphasizes the heightened importance of reducing building energy consumption. Cool pigments with higher near-infrared reflectivity contribute to the overall coating performance of the building. In this work, a novel intense blue pigment with superior infrared reflectance based on Ni-doped Zn2SiO4 was successfully synthesized via the simple solid-state method. The crystal structure, oxidation states, and optical properties are analyzed. The oxidation state of Ni was confirmed to be +2 using magnetic analysis and XPS. The intense blue color exhibited by the solid solution is due to the 3T1(3F) → 3T1(3P) transition of Ni2+ at the tetrahedral sites. UV–vis–NIR spectra demonstrate that this pigment exhibits superior near-infrared reflectance compared to cobalt blue in the range of 900–1700 nm, indicating its potential application in the realm of building energy conservation.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xinzhe Zhou,Li Guan,Huanrong Li
The white LEDs with high performance and excellent luminous quality is of high importance for developing the current lighting industry, and high thermally stable blue phosphors play a critical role in the preparation of white LEDs. Herein, we reported a facile way to obtain highly efficient blue Eu 2+ -doped celsian phosphor with excellent thermal stability by a phase transformation of Ba 2+ -exchanged SOD Zeolite strategy. The structure of phosphors changed from nepheline to celsian with the doping of Ba 2+ , and the maximum emission intensity blue-shifts from 550 nm to 450 nm under the excitation of 370 nm. The PLQY is determined to be 56 %, 96 % and 82 % for the phosphor with Ba 2+ doping concentration being 0, 1.49 and 1.86, respectively, and the luminescence intensity at 423 K is can be 80 %, 102 % and 93 % of its intensity at room temperature. Finally, the package of the LED device based on our yellow and blue phosphors together with the commercial red CaAlSiN 3 :Eu 2+ phosphor is constructed to show warm white light with the CCT of 3705 K and a high CRI of 97.7. This study provides a facile way for obtaining satisfactory phosphors for high-quality lighting.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2025
·
IF 6.6
Jingwen Li,Hui Yu,Lijuan Wang,Qing Ma,Dongkun Zhao,Baocheng Xu,Xinjing Dou,Lili Liu
This study investigated the protective effects of five colored PET films against phytosterol (PS) oxidation in vegetable oil. The transparent film demonstrated the lowest inhibition rates for the formation of phytosterol oxidation products (POPs) among the five coloured films, which inhibited PS oxidation solely by reducing light intensity. In contrast, the blue film exhibited superior light barrier characteristics, effectively blocking wavelengths corresponding to ultraviolet light and chlorophyll excitation bands. This dual mechanism significantly reduced both auto-oxidation and type II photooxidation pathways of PS. Consequently, the blue film increased inhibition rates for POPs (7α-OH-PS, 7β-OH-PS, 5α,6α-epoxy-PS, 7-keto-PS, 6β-OH-PS, and 5β,6β-epoxy-PS) from 22.12 %, 13.66 %, 15.08 %, 12.16 %, 12.93 %, and 10.70 % to 76.60 %, 75.29 %, 79.40 %, 75.41 %, 77.56 %, and 75.33 %, respectively. Mechanistic analysis revealed that the blue film's enhanced protection for PS oxidation originated from its inhibition of C7 pathway-mediated POP generation. While red, yellow, and green films operated through similar protective mechanisms, their efficacy varied significantly. The overall protective performance was ranked as follows: red ≈ blue > yellow > green > transparent. These findings provide critical insights for developing optimized packaging solutions to inhibit PS oxidation in lipid-containing food products.
研究领域:
食品科学
·
植物化学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 24
·11452-11459
·
IF 7.233
Lijia Liu,Jitao Li,John A. McLeod
We report a series of Eu-substituted methylammonium lead tribromide quantum dots (MAPb1−xEuxBr3 QDs). The crystallinity of these QDs increases with increasing Eu content, while there is only a small change in the lattice constant, and the morphology of the MAPb1−xEuxBr3 QDs is unaffected by the Eu content. This demonstrates that Eu is a suitable element for substituting Pb while retaining the original crystal structure. We observe blue photoluminescence (PL) consistent with Eu2+, which, at high Eu content (x = 0.3), contributes luminescence intensity equal to the green PL of unsubstituted MAPbBr3 QDs. As Eu is a less toxic substitute for Pb, that also provides blue luminescence, MAPb1−xEuxBr3 QDs may prove to be a valuable optoelectronic material.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Shichang Xu,Jianjun Duan,Peipei Dong,Muyao Wang,Yanjie Zhang,Jingjie Yu
A series of Eu 2+ activated Ca 10 (PO 4 ) 6 Cl 2 phosphors (ClAp: Eu 2+ ) with enhanced blue emission have been prepared by the deposition precipitation (DP) process. The XRD patterns indicate that Eu 2+ ions are incorporated into Ca 10 (PO 4 ) 6 Cl 2 lattice during the DP process. The ClAp: xEu 2+ -DP phosphor exhibits an super broad excitation band of 250 nm–420 nm consisting of three distinct peaks at 276 nm, 343 nm and 365 nm, ascribed to the 4f 6 → 4f 7 5 d 1 transition of Eu 2+ ions in 4f and 6 h sites. Under 350 nm excitation, ClAp: xEu 2+ -DP phosphors show the intense blue emission at 453 nm and the maximum intensity is obtained when x = 0.3. Notably, an enhanced blue emission intensity of ~2.1 times can be found for ClAp:0.3Eu 2+ -DP phosphor compared with the sample prepared by traditional solid state reaction (SSR) method. Further, the EDX elemental mapping of the phosphor demonstrates that DP process can effectively promote the uniform distribution of Eu 2+ ions on the surface of ClAp crystal and avoid the aggregating problem of activators in SSR method, which can greatly improves the photoluminescence property. It can be concluded from HRTEM images and decay curves that ClAp:0.3Eu 2+ -DP phosphor exhibits characteristic lattice fringes similar to those of ClAp:0.3Eu 2+ -SSR phosphor, but a longer average decay lifetime (392 ns). In addition, the presence of trivalent europium ions on the surface of ClAp: 0.3Eu 2+ -SSR and ClAp: 0.3Eu 2+ -DP phosphors can be identified by XPS analysis . All the results reveal that DP process is an efficient way to prepare highly dispersed Eu 2+ activators in Ca 10 (PO 4 ) 6 Cl 2 host and the ClAp: Eu 2+ -DP phosphors can be the promising candidate for blue emission in white LEDs.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
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