JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Dudu Li,Zibo Yang,Lixia Yang,Chao Ma,Mao Ye,Yuxiu Sun,Zhihua Qiao,Aibing Chen
Metal-organic framework (MOF) glass is a promising candidate material for gas separation. However, MOF glasses have low porosity, which is not conducive to prepare high permeance membranes. Herein, we incorporated porous ZIF-7 into ZIF-62 glass membrane to prepare self-supported flux melted glass membranes for gas separation. The introduction of ZIF-7 not only improved pore continuity but also enhanced the porosity of the resulting glass membranes. In addition, the melting nature of ZIF-62 promotes the co-melting of ZIF-7 and thus effectively improves the interfacial compatibility. In such cases, the typical a g [(ZIF-62) 0.7 (ZIF-7) 0.3 ] membrane exhibits the ideal selectivity of 98.6 for H 2 /CH 4 and 35.3 for CO 2 /CH 4 , with H 2 permeance and CO 2 permeance of 120.3 and 43.1 GPU, respectively, exceeding the corresponding Robenson upper bounds. Besides, the a g [(ZIF-62) 0.7 (ZIF-7) 0.3 ] membrane displays good long-term test stability for 48 h under variable pressure conditions. This work may provide a new design concept and experimental support for the construction of new MOF membranes for gas separation.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2022
·
IF 10.508
Taotao Ji,Yifan Song,Jiahui Yan,Yanwei Sun,Chen Wang,Sixing Chen,Yi Liu
The crystal–liquid–glass phase-transition behavior of coordination polymers (CPs) endows them with unique processing and mechanical properties to prepare functional CP glass films. However, their potential applications are still waiting to be explored. In this study, flawless [Zn(HPO4)(H2PO4)2](H2Im)2 (abbreviated as ZnP-H2Im) glass films are facilely prepared through rapid hot casting coupled with melt quenching. Relying on the grain-boundary-free structure of the film and nonporous structure of the coordination network, undesired diffusion of guest molecules in ZnP-H2Im glass films can be effectively prohibited, which is advantageous for gas permeation and liquid leakage prevention. Gas permeation test results indicate that the barrier efficiency of the ZnP-H2Im glass film to gas molecules reaches 100%, while polarization curve and EIS results imply that prepared ZnP-H2Im glass film possesses excellent corrosion resistance in salt aqueous solution with a protection efficiency up to 99.98% for metallic substrate. Our research demonstrates that CP glasses hold great potential to serve as competent gas barrier layers and corrosion-resistant coatings.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Optical Materials
·
2024
·
IF 0
Lei Jin,Shuting Liu,Haoran Zhang,Wei Li,Jianle Zhuang,Chaofan Hu,Yingliang Liu,Mingtao Zheng,Xuejie Zhang,Bingfu Lei
The development of laser-driven lighting is progressing toward achieving high-power and high-brightness capabilities. However, all-inorganic color converters still face significant challenges arising from heat accumulation. Herein, we propose an effective approach to enhance the thermal conductivity of the light converter by closely sintering Y3Al5O12:Ce3+ (YAG:Ce3+) phosphor-glass films on a highly thermally conductive BN substrate (abbreviated as PBNC) for localized heat dissipation. This results in a significant increase in the luminescence saturation threshold when exposed to blue laser irradiation. The laser bearing capacity of PBNC is effectively optimized by adjusting the ratio of phosphor to glass and the thickness of the BN substrate. Under a laser irradiation level of 4.47 W/mm2 for 3 min, the maximum surface temperature of the PBNC is 92 °C, representing a significant reduction of 44 °C compared to that of the phosphor-glass film on the AlN substrate (136 °C). A laser-driven lighting device employing a PBNC with a thickness of 2.5 mm gives a luminous flux of 590.4 lm and luminous efficacy of 173.6 lm/W under a laser power density of 5.07 W/mm2. These findings confirm that the BN substrate enhances the thermal conductivity of phosphor-glass films, enabling them to become highly promising color converters for laser-driven lighting.
研究领域:
光学工程
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材料科学
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照明技术
✓ 已验证
DOI
ADVANCED ENGINEERING MATERIALS
·
2024
·Vol. 26
·期 23
·2401477
·
IF 3.4
Le Fu,Zihua Lei,Wenjun Yu,Yang Liu
Thermally driven grain coarsening is a commonly encountered issue in nanocrystalline ceramics, particularly in high-temperature environments. The intergranular glass film (IGF) constitutes a crucial component of most ceramics and plays a pivotal role in the process of grain coarsening. In this study, it is proposed to impede grain coarsening by constructing a chemically complex IGF comprising multiple dopants with distinct ionic radii. Ternary dopants encompassing Al 3+ , Y 3+ , and La 3+ ions are simultaneously incorporated into a ZrO 2 –SiO 2 nanocomposite. To fabricate the nanocomposite, an amorphous precursor powder with uniformly dispersed dopants is prepared using a chemical coprecipitation method, followed by rapid hot pressing to obtain a dense bulk sample. The distribution behavior of ternary dopants at IGFs between adjacent ZrO 2 nanocrystallites (NCs) is carefully examined. It is revealed that the ternary dopants coexist at the IGFs. Moreover, Si 4+ ions exhibit preferential enrichment at the IGFs. Remarkably, the presence of chemically complex IGFs significantly enhances the resistance to grain coarsening in ZrO 2 NCs up to 1000 °C. In these findings, valuable insights are offered for designing and fabricating nanocomposites with exceptional resistance against grain coarsening.
研究领域:
材料科学
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陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Yuhang Kuang,Yongsheng Sun,Weibin Chen,Yuzhen Wang,Zhiguo Xia
Laser projection display technology (LPDT), as next-generation visual system, has been prized for the ultrawide color gamut and operational stability. However, thermal degradation under laser irradiation and the scarcity of efficient narrow-band emitters are always challenging in LPDT. Herein, a double-sapphire-sandwiched phosphor-in-glass film (PiGF) based on commercial red-emitting K 2 SiF 6 :Mn 4+ and green-emitting β -SiAlON:Eu phosphors, is designed and prepared by a rapid sintering method. The as-prepared PiGF demo can achieve high luminous flux of 3765 and 1365 lm, respectively, and the ingenious cooperative rotating dynamic heat dissipation mechanism maintains temperatures at 60 °C even under 14 W mm −2 laser irradiations, thereby preventing degradation. Once being integrated into a multicolor phosphor wheel, it generates noncoherent white light covering 125% of the Rec.709 color standard representing an ultrawide color gamut. This work provides an advanced phosphor material platform enabling high-brightness, reliable LPDT for next-generation projectors and televisions.
研究领域:
光学工程
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材料科学
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显示技术
·
光电子学
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固态照明
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热管理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2024
·
IF 5.2
Yun Mou,Ben Tian,Xin Liu,Jiuzhou Zhao,Xinyuan Wang,Deyi Chen,Jian Xu,Xinzhong Wang,Yang Peng
All-inorganic reflective phosphor-in-glass film (PiGF) converter has garnered widespread attentions for high brightness laser-driven white lighting, while its poor color quality and low luminescence stability have been inevitable roadblocks. Herein, the bicolor PiGF containing green-emitting Y 3 Al 3.08 Ga 1.92 O 12 :Ce 3+ (YAGG) and red-emitting CaAlSiN 3 :Eu 2+ (CASN) phosphors bonded on Al 2 O 3 substrate was prepared for enabling high color quality laser-driven white lighting in reflective configuration. The bicolor PiGF has high quantum efficiency and good structure stability. By optimizing the CASN content, PiGF thickness and Al 2 O 3 content, the reflective bicolor PiGF based white laser diode (LD) displays good luminescence performance with a luminous flux of 451.5 lm and a luminous efficacy of 142.3 lm/W and high color quality with a color rendering index (CRI) of 85.3 and a correlated color temperature (CCT) of 5177 K under the incident laser power of 3.15 W, and still has excellent luminescence and color stabilities (CRI and CCT) under the continuous laser excitation of 5.61 W, attributed to the good thermal conductivity and high reflectivity of Al 2 O 3 substrate and scattering enhancement effect of Al 2 O 3 particles. It can be foreseen that the reflective bicolor PiGF converter provides a promising strategy for enabling high quality laser-driven white lighting.
研究领域:
光学材料
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光源技术
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Sifan Zhuo,Shisheng Lin,Tao Pang,Lingwei Zeng,Zikang Yu,Yang Peng,Ran An,Zhehong Zhou,Guoyu Xi,Shaojun Wang,An Xie,Daqin Chen
Although blue laser-excited phosphor-in-glass films (PiGFs) have been extensively investigated for laser-driven display applications, their performance is still constrained due to a broad red emitting spectrum and thermal management challenges, etc. To overcome these limitations, this study develops a novel composite architecture – YAG: Ce transparent ceramic-CsPbBr 1.5 I 1.5 quantum dots (CPBI QDs) in glass film enhanced with h-BN (YAG: Ce TC-QiGF BN). YAG: Ce TC acts as a high thermal conductivity substrate and yellow light component, while QiGF enables to produce narrowband red emission. The h-BN particles are dispersed within QiGF, where a significant portion of them accumulate around the CPBI QDs powders. The inclusion of h-BN significantly improves both light extraction efficiency and thermal conductivity, leading to an increase of blue-light absorption efficiency from 57.74% to 69.26% and mitigation of heat accumulation induced by high-power laser irradiation. Among the three designed prototype projection display systems (YAG: Ce TC, YAG: Ce TC- CASN: Eu PiGF, and YAG: Ce TC-QiGF BN), the YAG: Ce TC-QiGF BN-based configuration demonstrates the most effective red-light enhancement and superior color rendering performance, particularly exhibiting the purest red color due to its narrowband emission feature. This innovative material holds considerable potential for the next-generation laser-driven displays.
研究领域:
材料科学
·
光电子学
·
纳米技术
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光子学
·
热工学
✓ 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）