Surfaces and Interfaces
·
2024
·
IF 5.7
Wanying Wu,Jieni Ning,Zhengheng Li,Chaoyang Lei,Qiuxue Jian,Chenzhang Gu,Zhiyao Zhou,Binli Xiao,Sheng Wu,Yinzhen Wang
Te doped Y 3 Al 5 O 12 blue-emission nanophosphors were successfully fabricated by the sol-gel method. The effects of Te doping on the structure, morphology, valence state and luminescence properties of samples were investigated using XRD, SEM, XPS and PL techniques. The results demonstrate that all diffraction peaks are in line with pure Y 3 Al 5 O 12 phase. SEM images exhibit that the prepared samples possess a uniform grain size and nearly spherical shape. The YAG:2 %Te 4+ powder sintered at 900 °C shows intense blue emission at 467 nm under 280 nm excitation, with a lifetime of 2.36 μs. These findings suggest that YAG:Te 4+ powders hold significant potential as suitable candidates for NUV-LED applications.
研究领域:
材料科学
·
光学
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 27
·2214497
·
IF 19
Zhichao Liu,Xue Yu,Qingpeng Peng,Xiaodie Zhu,Jianqiang Xiao,Jiangtao Xu,Shouxiang Jiang,Jianbei Qiu,Xuhui Xu
Mechanoluminescence (ML) materials with long-wavelength emission bands are essential for future in vivo bioimaging, non-destructive testing of solids, etc. The lack of a defined mechanism, however, prevents the application of near infrared ML materials above 650 nm in several new fields. Here, the addition of Ga 3+ ions to Y 3 Al 5 O 12 : Cr 3+ manipulates matrix microstructure evolution, boosting near-infrared (NIR) zero-phonon line (ZPL) stress optical output of the Cr 3+ ion at 688 nm. The key factor changing the crystal field intensity D q /B due to the addition of Ga 3+ ions is what causes the luminescence amplification of ZPL. The ML fabricated by composite polydimethylsiloxane and Y 3 Al 4 GaO 12 : Cr 3+ (YAGG: Cr 3+ ) may penetrate chicken feet epidermal tissue and 4 mm pork tissue thanks to the strong NIR ZPL emission of YAGG: Cr 3+ phosphor. This discovery of enhancing near-infrared ZPL intensity by solid solution provides us with a new technique for optimizing NIR ML materials, as well as a new prospect for NIR ML materials in biological applications.
研究领域:
材料科学
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生物医学工程
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DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 67
·54769-54776
·
IF 3.84
Chunxiao Lu,Yang Chen,Yun Li,Chunhong Ma,Hongbo Zhang,Yuwei Guo,Jun Wang
A highly effective and stable up-conversion luminescence agent, Er3+:Y3Al5O12, was synthesized by sol–gel and calcination methods. Then, as a novel visible-light photocatalyst, Er3+:Y3Al5O12, Pt and PdS (as dual co-catalysts) decorated ZnS nano-sized composites, Er3+:Y3Al5O12/Pt–PdS/ZnS, were fabricated by deposition–precipitation and ultrasonic dispersion methods. All prepared samples were characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and energy dispersive X-ray spectroscopy (EDX). UV-vis absorption and PL spectra of Er3+:Y3Al5O12 were also determined. The visible-light photocatalytic H2 production activity of the prepared Er3+:Y3Al5O12/Pt–PdS/ZnS was evaluated by using Na2S and Na2SO3 as sacrificial reagents in an aqueous solution under 300 W irradiation from a xenon lamp. In addition, some influential factors such as Er3+:Y3Al5O12 and ZnS mass ratio, catalyst amount, irradiation time and irradiation intensity on visible-light photocatalytic H2 production of Er3+:Y3Al5O12/Pt–PdS/ZnS were investigated in detail. It was found that Er3+:Y3Al5O12 can effectively improve the visible-light photocatalytic activity of ZnS. Particularly, Er3+:Y3Al5O12/Pt–PdS/ZnS with 0.13 wt% PdS and 0.3 wt% Pt and a 0.30 : 1.00 mass ratio shows the highest photocatalytic H2 production activity in the sulfide/sulfite (0.2 mol L−1 Na2S and 0.3 mol L−1 Na2SO3) aqueous solution as sacrificial reagents.
研究领域:
材料科学
·
能源化学
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2020
·
IF 3.306
Shuguang Li,Zhiyu Liu,Chunxiao Lu,Zhihui Qu,Congcong Piao,Jianhe Tang,Dawei Fang,Jun Wang
The use of co-catalysts can observably enhance photocatalytic hydrogen production activity. In this work, a novel visible-light driven photocatalyst, (MoSe 2 -RGO)/(Er 3+ :Y 3 Al 5 O 12 /ZnS)/RuO 2 nanocomposite, is prepared for the first time by loading Er 3+ :Y 3 Al 5 O 12 , MoSe 2 -RGO and RuO 2 on the surface of ZnS nanoparticles. Er 3+ :Y 3 Al 5 O 12 as an effective visible-to-ultraviolet up-conversion luminescence agent can provide the ultraviolet-light to activate wide band-gap ZnS. MoSe 2 -RGO and RuO 2 , acting as conduction band co-catalyst and valence band co-catalyst, respectively, can effectively separate the photo-generated carriers and supply more reactive sites. The activities of the photocatalysts were assessed via photocatalytic hydrogen production in Na 2 S and Na 2 SO 3 aqueous solution under 300 W xenon lamp irradiation. In addition, the visible-light irradiation time and used times of the prepared samples as influence factors on the photocatalytic hydrogen production were also investigated. It was easily found that the prepared (MoSe 2 -RGO)/(Er 3+ :Y 3 Al 5 O 12 /ZnS)/RuO 2 nanocomposite shows fairly high activity in photocatalytic hydrogen production, compared with single ZnS photocatalyst. It was mainly attributed to the excellent up-conversion luminescence property of Er 3+ :Y 3 Al 5 O 12 and the efficient separation of photo-generated electrons and holes caused by MoSe 2 -RGO and RuO 2 . This research may pave an effective way for photocatalytic hydrogen production utilizing solar light.
研究领域:
材料科学
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能源化学
·
纳米技术
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Moke Zhou,Bin Tang,Shuren Zhang
The influence of the TEOS (Si(OC 2 H 5 ) 4 ) addition, which decomposes into SiO 2 at high temperature, on the sintering process, morphology, and microwave dielectric properties in Y 3 Al 5 O 12 (YAG) ceramics were investigated in this work. The Y 3 Al 5 O 12 + x wt.% TEOS (0≤ x ≤ 1) ceramics were synthesized through solid-state reaction. The XRD results indicated that all YAG samples possessed a pure cubic garnet structure. The dense, pore-free crystalline microstructure of the specimen was measured by SEM. The Rietveld method was employed to refine the lattice parameters of YAG samples. Results showed that the samples' cellular parameters decreased with increasing amounts of TEOS. The addition of TEOS lowered the sintering temperature and improved the Q × f values of Y 3 Al 5 O 12 ceramics. The YAG system was added by 0.5 wt% TEOS can be exhibited excellent microwave dielectric properties with ε r =10.82, Q × f = 229,423 GHz, τ f = -29.1 ppm/°C sintering at 1670 °C for 12 h.
研究领域:
材料科学
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陶瓷工程
·
电子材料
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Qing Wang,Ziyang Ruan,Jianyu Li,Zifan Zhao
Yttrium aluminum garnet (Y 3 Al 5 O 12 , YAG) is regarded as a candidate of thermal barrier coating material for its excellent thermal stability and corrosion resistance, yet the poor fracture toughness and the low thermal expansion coefficient are the roadblock that limits its application. In order to improve the fracture toughness and the thermal expansion coefficients, a series of Y 3 Al 5 O 12 composite ceramics toughened by ferroelastic LaAlO 3 second phase were prepared by in-situ synthesis method in this work. The prepared x LaAlO 3 /(1- x )Y 3 Al 5 O 12 composite ceramics ( x =10∼50%) exhibit superior fracture toughness (2.16 MPa·m 0.5 ∼2.63 MPa·m 0.5 ) with respect to single-phase Y 3 Al 5 O 12 (1.94 MPa·m 0.5 ), which is mainly attributed to the synergistic effects of ferroelastic toughening of second phase, residual stress toughening, and fine-grain strengthening. On the account of the synergistic effects of three toughening mechanisms, 0.2LaAlO 3 /0.8Y 3 Al 5 O 12 composite ceramic manifest the strongest fracture toughness (2.63 MPa·m 0.5 ), which is 36% improved compared with single-phase Y 3 Al 5 O 12 . In addition, the thermal expansion coefficients of x LaAlO 3 /(1- x )Y 3 Al 5 O 12 specimens (9.54∼9.97 × 10 -6 K -1 at 1200 °C) are larger than that of Y 3 Al 5 O 12 (9.25 × 10 -6 K -1 at 1200 °C). Especially, 0.5LaAlO 3 /0.5Y 3 Al 5 O 12 specimen exhibits the highest thermal expansion coefficient (9.97×10 -6 K -1 at 1200 °C), which improve by 7.78% compared to single-phase Y 3 Al 5 O 12 . The improved fracture toughness and the capable thermal expansion coefficients of LaAlO 3 /Y 3 Al 5 O 12 composite ceramics renders their promising aspect for thermal barrier coating application.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yukun Li,Yongfu Liu,Zhaohua Luo,Zehua Liu,Svenja Hanson,Chengheng Pang,Hui Lin,Haiming Qin,Jun Jiang
Ce/Mn/Cr: Y 3 Al 5 O 12 transparent ceramics with a pure garnet structure and a high color rendering index were prepared by a solid-state reaction method. Mn 2+ and Cr 3+ enhance the emission between 500 and 700 nm and expand the conventional Ce: YAG phosphors spectrum. The Ce 3+ can work both, as activators and sensitizers, and the intense energy transfer from Ce 3+ to Mn 2+ /Cr 3+ is realized through the non-radiative and radiative processes. In the sample with the optimized doping concentration the high color rendering index (CRI) value of 75.3 can be achieved under a 450 nm laser diode excitation. The chromaticity coordinates can be tuned from (0.3125, 0.3232) to (0.2917,0.2851) by varying the doping concentration. With the increasing Mn 2+ /Cr 3+ doping concentration, the lifetime of Ce 3+ , quantum efficiency and luminous efficiency are all gradually decreased. This work effectively offers a scheme for realizing the high color rendering performance of phosphor-converted transparent ceramics in white LEDs/LDs.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2016
·
IF 4.179
Yidi Wang,Bowen Li,Guanshu Li,Yingying Huang,Dawei Fang,Jun Wang,Youtao Song
Three crystal phases of BiPO 4 (HBIP, nMBIP and mMBIP), corresponding photocatalysts (Er 3+ :Y 3 Al 5 O 12 /HBIP, Er 3+ :Y 3 Al 5 O 12 /nMBIP and Er 3+ :Y 3 Al 5 O 12 /mMBIP) and their nanocomposite photocatalyst (Er 3+ :Y 3 Al 5 O 12 /(H-nM-mM)BIP) were prepared by hydrothermal, ultrasonic dispersion and liquid boiling methods. The prepared photocatalysts were characterized by X-ray diffractometer (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM) and UV–vis diffuse reflectance spectra (DRS). The catalytic activity of prepared photocatalysts was evaluated via photocatalytic conversion rate of nitrite under ultraviolet-light, visible-light and simulated solar-light irradiations. These three photocatalysts all exhibited excellent performance under simulated solar-light irradiation and reached 85.36%, 84.42% and 78.53% conversion rates, respectively, for Er 3+ :Y 3 Al 5 O 12 /mMBIP, Er 3+ :Y 3 Al 5 O 12 /nMBIP and Er 3+ :Y 3 Al 5 O 12 /HBIP. Particularly, Er 3+ :Y 3 Al 5 O 12 /(H-nM-mM)BIP was also found to play a high catalytic activity, resulting in 78.68%, 70.04% and 82.57% conversion rates, respectively, under ultraviolet-light, visible-light and simulated solar-light irradiation. In addition, the study of used times showed that the prepared photocatalysts can be effectively recycled without an apparent inactivation on the photocatalytic activity. This research may provide a potential way for converting nitrite and other contaminants by utilizing solar energy efficiently.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2018
·
IF 6.012
Guowei Wang,Siyi Li,Xue Ma,Jing Qiao,Guanshu Li,Hongbo Zhang,Jun Wang,Youtao Song
A novel Z-scheme coated composite, Er 3+ :Y 3 Al 5 O 12 @Ni(Fe 0.05 Ga 0.95 ) 2 O 4 -Au-BiVO 4 , was designed for sonocatalytic degradation of sulfanilamide and fabricated by sol-hydrothermal and calcination methods. The prepared sample was characterized by X-ray diffractometer (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDX), UV–vis diffuse reflectance spectra (DRS), fourier transform infrared (FT-IR) spectra, Raman spectra and photoluminescence (PL) spectra. In Er 3+ :Y 3 Al 5 O 12 @Ni(Fe 0.05 Ga 0.95 ) 2 O 4 -Au-BiVO 4 , Ni(Fe 0.05 Ga 0.95 ) 2 O 4 and BiVO 4 form a Z-scheme sonocatalytic system, Er 3+ :Y 3 Al 5 O 12 as an up-conversion luminescence agent (from visible-light to ultraviolet-light) provides the ultraviolet-light for satisfying the energy demand of wide band-gap Ni(Fe 0.05 Ga 0.95 ) 2 O 4 and Au nanoparticles as co-catalyst forms more active sites to enrich electrons. Also, Au nanoparticles as conductive channels promotes the electrons (e − ) from conduction band of BiVO 4 to transfer to valence band of Ni(Fe 0.05 Ga 0.95 ) 2 O 4 . Due to the characteristics of valence state diversity, the Fe 3+ and V 5+ constitute a redox reaction recombination system, which can also push electrons (e − ) on conduction band of BiVO 4 to quickly transfer to valence band of Ni(Fe 0.05 Ga 0.95 ) 2 O 4 . The sonocatalytic activity of Er 3+ :Y 3 Al 5 O 12 @Ni(Fe 0.05 Ga 0.95 ) 2 O 4 -Au-BiVO 4 nanocomposite was detected through degradation of sulfanilamide under ultrasonic irradiation. A high sonocatalytic degradation ratio (95.64%) of sulfanilamide can be obtained when the conditions of 10.00 mg/L sulfanilamide, 1.00 g/L Er 3+ :Y 3 Al 5 O 12 @Ni(Fe 0.05 Ga 0.95 ) 2 O 4 -Au-BiVO 4 , 300 min ultrasonic irradiation and 100 mL total volume were adopted. Some factors such as ultrasonic irradiation time and cycle number on the sonocatalytic degradation efficiency are also investigated by using TOC and UV–vis spectroscopy. Subsequently, the effects of hydroxyl radicals ( OH) and hole scavengers were investigated to elaborate the mechanism. The researches show that the prepared Z-scheme Er 3+ :Y 3 Al 5 O 12 @Ni(Fe 0.05 Ga 0.95 ) 2 O 4 -Au-BiVO 4 coated composite displayed an excellent sonocatalytic activity in degradation of sulfanilamide under ultrasonic irradiation.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 84
·80595-80603
·
IF 3.289
Yang Rong,Liang Tang,Yahui Song,Shengnan Wei,Zhaohong Zhang,Jun Wang
A new visible-light-sensitive photocatalyst, Er3+:Y3Al5O12/MoS2–NaTaO3–PdS, was prepared by hydrothermal, liquid boiling and deposition methods. The prepared photocatalysts were all characterized using an X-ray diffractometer (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and high-resolution transmission electron microscopy (HRTEM). The photocatalytic activity of the prepared photocatalysts was evaluated via photocatalytic degradation of amaranth as a refractory pollutant with simultaneous hydrogen evolution under visible-light irradiation. Moreover, the effects of the visible-light irradiation time and molar ratio of Er3+:Y3Al5O12 and NaTaO3 on the photocatalytic capability of Er3+:Y3Al5O12/MoS2–NaTaO3–PdS were studied. The results show that the use of Er3+:Y3Al5O12 can improve the utilization ratio of visible light (solar light) for NaTaO3. The optimum ratio of Er3+:Y3Al5O12 and NaTaO3 is 0.45 : 1.00. In addition, a study of extended reusability shows that the prepared photocatalyst can be effectively recycled for three repetitive cycles without an apparent deactivation of the photocatalytic activity. A visible-light photocatalytic degradation mechanism of amaranth with simultaneous hydrogen evolution is also proposed.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
Molecular Catalysis
·
2017
·
IF 0
Zepeng Qu,Yang Rong,Liang Tang,Xiaoqing Shu,Xudong Liu,Zhaohong Zhang,Jun Wang
A new visible-light-induced Z-scheme photocatalytic system, Er 3+ :Y 3 Al 5 O 12 /(MoS 2 /NiGa 2 O 4 )-(BiVO 4 /PdS), is designed and prepared by using hydrothermal and mixed-calcination methods And the prepared samples are characterized by X-ray diffractometer (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier-transform infrared (FTIR) and UV–vis absorption spectra. The photocatalytic activity is evaluated towards Orange G degradation with simultaneous hydrogen evolution under visible-light irradiation. The photocatalytic experiments indicate that the Er 3+ :Y 3 Al 5 O 12 /(MoS 2 /NiGa 2 O 4 )-(BiVO 4 /PdS) as photocatalyst displays very high photocatalytic activity. It can be ascribed to two sides. One is the use of Er 3+ :Y 3 Al 5 O 12 offering ultraviolet-light to activate the wide-band gap NiGa 2 O 4 . Another is the construction of Z-scheme system between NiGa 2 O 4 and BiVO 4 which can result in a more efficient separation of photoexicited charge carriers, thus endowing it with much powerful oxidation and reduction capabilities. Moreover, the reusability study shows that the prepared photocatalyst can be effectively recycled for three repetitive cycles without an apparent deactivation. In addition, the possible Z-scheme mechanism of Er 3+ :Y 3 Al 5 O 12 /(MoS 2 /NiGa 2 O 4 )-(BiVO 4 /PdS) is also proposed, and further evidenced by photoluminescence (PL) spectra. The present work not only designs a new photocatalytic system but also well applies in photocatalytic degradation of refractory pollutant with simultaneous hydrogen evolution.
研究领域:
环境科学
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材料科学
·
光催化技术
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产品关联
DOI
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 30
·65388-65397
·
IF 5.6
Jiahao Zha,Chongjun He,Fangzhou Chen,Xianhong Li,Jiayin Song,Chenguang Deng,Qian Li,Lijuan Liu,Mingjun Xia,Yuangang Lu
The fluorescence intensity ratio (FIR) technique has emerged as a pivotal approach in non-contact optical thermometry, offering substantial application potential. In this study, Y 3 Al 5 O 12 (YAG) phosphors co-activated with Ce 3+ and Cr 3+ ions were successfully synthesized through a high-temperature solid-state reaction method. Spectroscopic analysis revealed efficient energy transfer between the dopant ions, manifesting as distinct luminescence intensity variations compared to their single-doped counterparts. Under 450 nm excitation, the system demonstrates prominently yellow-green emission from Ce 3+ ions and well-resolved red emission from Cr 3+ ions, ensuring excellent spectral discrimination. Capitalizing on the differential thermal response between the two luminescent centers, the developed system achieves remarkable temperature sensing performance. The FIR method yields a maximum relative sensitivity of 0.845 % K −1 , maintaining sensitivity above 0.6 % K −1 throughout the 340–580 K range, coupled with exceptional temperature resolution below 0.03 K. Furthermore, we have engineered a novel FIR thermometry system incorporating 3D-printed spectral modules and fiber-optic phosphor encapsulation. The integrated system demonstrates superior sensing capabilities, reaching sensitivity values of 1.23 % K −1 in Cr 3+ lifetime mode and 4.64 % K −1 in FIR mode. These results indicate that Ce/Cr co-doped YAG has exceptional potential in multimodal optical thermometry applications.
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DOI
高影响因子
危险品化学品经营许可证（带存储）