SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Ning Li,Chao Ma,Dudu Li,Peng Li,Mao Ye,Ziyue Wang,Zhihua Qiao,Chongli Zhong
Mixed matrix membranes (MMMs), combining the advantages of polymer membranes and porous materials, processing the potential to realize large-scale gas separation applications. However, the interfacial defects in MMMs greatly hindered gas separation performance improvement. Therefore, designing an MMM with high loading and good interfacial compatibility remains a critical issue in promoting the application of MMMs. Herein, during in - situ heating process, the melting of liquid ZIF-62 in PBI polymer can largely fill the interfacial defects in MMMs. The microporous transport channels of ZIF-62 glass in MMMs promoted the H 2 diffusion and inhibited the CO 2 and CH 4 diffusion, thus enhancing the H 2 /CO 2 and H 2 /CH 4 separation of MMMs. For mixed gas testing, the 45 wt% ZIF-62 glass/PBI membrane had the maximum H 2 permeability of 459 barrer, and its H 2 /CO 2 and H 2 /CH 4 selectivities were 23 and 57, higher than the gas separation upper bonds. In addition, ZIF-62 glass/PBI membrane exhibited stable separation performance under 1–5 bar pressure. Therefore, the rational combination of MOF glass and polymer matrix could provide promising potential for reducing the interfacial defects of high-loading MMMs, thus enhancing the gas separation performance.
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
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Taoli Deng,Zan Ding,Shuang Zheng,Rong-Jun Xie
Ce3+-doped nitride phosphors are promising color converters in laser-driven lighting and display technologies, but they suffer from serious loss in luminescence efficiency caused by the interfacial reaction between phosphor powders and glass powders during the fabrication of phosphor-in-glass bulks or films. In this work, the oxygen-free organic–inorganic hybrid glass (OIHG) Zn(Im)3(HbIm) (ZIF-62) was used instead of the traditional oxide glass to prepare an La3Si6N11:Ce3+ (LSN) phosphor converter by cofiring LSN with the ZIF-62 glass. The LSN phosphor-in-ZIF-62 glass converter well maintains the internal quantum efficiency of the original phosphor powders, showing a luminescence loss of only ∼1%. The sandwich-structured LSN-in-ZIF-62 glass converter, constructed by cofiring it with sapphire substrates, enables the generation of white lighting with a maximum luminous flux of 872.2 lm and a luminous efficacy of 291 lm W−1 when pumped by a blue laser diode at a powder density of 5.99 W mm−2. The use of the oxygen-free ZIF-62 glass provides a viable method to design nitride phosphor-based color converters for low-power laser-driven lighting, high-power LED lighting or projection 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
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·
IF 3.9
Xuejiao Wang,Guangguang Pi,Jianye Yang,Kai Wu,Yanshuo Li,Wei Fang
Developing a highly active and stable electrode with a controllable size is greatly demanded to satisfy the large-scale application of electrochemical hydrogen production via water splitting. To overcome this challenge, a novel binder-free membrane electrode comprising Pd anchored on ZIF-62 glass supported on a porous TiC substrate has been developed to catalyze the hydrogen evolution reaction (HER) in both acidic and alkaline conditions. The optimal Pd@ZIF-62/TiC membrane electrode only requires a stable overpotential of ∼90 mV to reach a current density of 30 mA cm −2 within 20 h of operation. The outstanding HER performance of such electrode can be ascribed to its unique porous membrane structure, which accelerates the mass transfer kinetics of electrolyte ions and in situ generated hydrogen bubbles. As the Pd decorated molten ZIF-62 glass penetrated heavily into the TiC support pores, a very strong adhesion between Pd@ZIF-62 electrocatalytic layer and TiC substrate could be formed, which lowers the interfacial resistance between the catalyst and its substrate as well as promotes the charge transfer kinetics of HER electrode.
研究领域:
电化学
·
材料科学
·
能源材料
·
催化
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Xinrui Liu,De Ao,Mao Ye,Zhi Wang,Zhihua Qiao,Song Zhao
Metal–organic framework (MOF) glass holds great promise for gas separation applications. However, the inherent low porosity of MOF glass poses a considerable challenge in improving membrane permeability. In this work, a self-supporting MOF crystal-glass composite (CGC) membrane was synthesized via an innovative blending and melting approach, in which ZIF-62 powder was converted into an amorphous glassy phase and ZIF-9 powder was partially flux-melted, effectively preventing the reorganization of Zn─N bonds within ZIF-62. Consequently, the composite component structure significantly enhances the porosity and permeability of the MOF glass membrane. Furthermore, the incorporation of cobalt into the membrane matrix has notably enhanced its adsorption affinity for CO 2 , thereby boosting CO 2 /CH 4 selectivity. The resultant a g [(ZIF-9) 0.2 /(ZIF-62) 0.8 ] membrane has demonstrated exceptional CO 2 permeability of 20,324 barrer and superior CO 2 /CH 4 selectivity, both surpassing the 2018 upper bound. Thus, the innovative strategy for the design of MOF CGC membranes offers effective solutions to the challenges inherent in gas separation processes.
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
POLYMER ENGINEERING AND SCIENCE
·
2025
·
IF 3.2
Xinru Yan,Yan Wang,Yaoming Zhang,Qihua Wang,Zhancheng Zhang,Mingchao Shao,Xianqiang Pei
To address the demand for lightweight, wear-resistant PEEK friction materials in humanoid robotics, this study employed liquid-assisted mechanochemical synthesis to create ZIF-62 crystals. These crystals were then incorporated as functional fillers into PEEK to fabricate ZIF-62/PEEK composites using fused deposition modeling (FDM) technology. The analysis explored how the material's properties related to mechanics and wear are affected by the amount of ZIF-62 (1–3 wt.%), utilizing pin-on-ring friction tests with GCr15 steel rings as the counterface. The tribological mechanisms of the composites were explored by analyzing the morphology of the composites' surfaces after wear, along with the morphology and chemical composition of the transfer films developed on the matching surface. Particular emphasis was placed on the impact of interfacial tribochemical reactions and transfer film establishment on the composite's tribological performance. Research indicates that the integration of ZIF-62 boosts the composite's strength and ability to withstand wear. Specifically, at a ZIF-62 concentration of 3 wt.%, the composites reach 3.7 × 10 −6 mm 3 /Nm, representing a 71.5% decline compared to pure PEEK, showcasing outstanding anti-wear capabilities. Findings of the study provide a unique solution for the tribological modification of PEEK, which is instructive for the design and preparation of PEEK tribo-materials used in humanoid robots.
研究领域:
材料科学
·
摩擦学
·
增材制造
·
聚合物复合材料
·
机器人材料
✓ 已验证
产品关联
DOI
高影响因子
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Mao Ye,Hexiang Huang,Lei Tian,Xiujing Zhang,Ziyao Wang,Chenxu Zhang,Zhihua Qiao
Separation of CH 4 and N 2 from natural gas is essential to increase energy efficiency and reduce environmental impact. In this work, we prepared novel mixed matrix membranes (MMMs) for CH 4 /N 2 separation using ion-exchange-modified molecular sieves as fillers and metal–organic framework (MOF) glass as substrates. The modification of molecular sieves enhanced the gas separation capability of the MMMs. And the MOF glass as a matrix has good compatibility with the filler. The membrane achieved a CH 4 permeance of up to 271.4 GPU and a CH 4 /N 2 selectivity of 7.35. The membrane was able to maintain stable separation performance under certain pressures and over a long testing period. The design of this study provides an innovative approach to advancing natural gas applications.
研究领域:
化学工程
·
材料科学
·
膜技术
·
分离过程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2026
·
IF 8.2
Xinru Yan,Xianqiang Pei,Yan Wang,Leyu Lin,Yaoming Zhang,Qihua Wang,Shanhong Wan
The development of high-performance polymer composites—combining strength, low friction, and wear resistance—remains an industrial challenge. In the present study, zeolite imidazolate framework ZIF-62 served as a multifunctional filler to fabricate ZIF-62/PEEK composites via fused deposition modeling (FDM). The effects of ZIF-62 on PEEK’s friction and wear were systematically investigated. By modulating the Im/BIm molar ratio in ZIF-62, we controlled the kinetics and composition of interfacial transfer film formation during sliding, thereby enhancing PEEK’s tribological performance. The optimal composition (ZIF-62/PEEK with Zn:Im:BIm = 1:1.5:0.5) reduced PEEK’s wear rate by 90 % to 1.45 × 10 ⁻⁶ mm 3 /Nm under 4 MPa × 0.25 m/s. The mechanisms behind this improvement were discussed based on multiscale characterization and molecular dynamics simulations. It was revealed that Zn species were released through the breakage of Zn–N bonds and reacted with degraded PEEK to form ZnO, while simultaneously inducing tribo-catalyzed graphitization. These products combined with iron oxides from the counterface to form a robust transfer film. This work establishes ligand engineering as a strategy for designing next-generation PEEK tribomaterials.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Ning Li,Chao Ma,Mao Ye,Xiangyu Guo,Zhihua Qiao,Chongli Zhong
Mixed-matrix membranes (MMMs) have arisen as an energy-saving and efficient candidate for CO 2 separation that can mitigate the greenhouse effect. However, challenges still remain in achieving good filler-polymer compatibility and high separation performance. Herein, a mechanochemistry method is proposed to synthesize an amine-functionalized ultramicroporous ZIF-62 (ZIF-UC-6) with good CO 2 affinity. Amino functional groups and open metal sites are introduced into ZIF-UC-6, which significantly improve its CO 2 adsorption capacity of ZIF-62. According to the ideal adsorption solution theory (IAST) calculation, the CO 2 /CH 4 and CO 2 /N 2 selectivity of ZIF-UC-6 is ∼80 and ∼140, respectively. Besides, when ZIF-UC-6 is incorporated into Pebax, hydrogen bonds can form between filler and polymer, which can increase the interfacial compatibility in the MMMs. The optimized membrane possesses a CO 2 permeability of ∼560 barrer, together with high CO 2 /CH 4 and CO 2 /N 2 selectivity of 41.8 and 86.2, surpassing the corresponding upper bounds. Moreover, the prepared MMMs have good pressure resistance and long-term stability. This work demonstrates an effective route for developing MMMs with good interfacial compatibility and high CO 2 separation performance for potential industrial applications.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Zhen-Dong Lian,Bo Wang,Zhi-Sheng Wu,Hao Lin,Shan-Shan Yan,Jie-Lei Li,Kang Zhang,Qing-Guang Zeng,Jin-Cheng Xu,Shi Chen,Shuang-Peng Wang,Kar Wei Ng
CsPbX3 (X = Cl, Br, I) perovskite nanocrystals (NCs) have shown great potential in numerous applications including wide color gamut display and lighting. Despite the wonderful luminescence properties, the inherent instability of these NCs hinders their use in practical situations. Herein, we report a facile aqueous-based, ligand-free method to synthesize highly stable CsPbX3 NCs using ZIF-62, a metal–organic framework, as an encapsulation matrix which effectively isolates CsPbX3 from the surrounding. We discovered that the slightly alkaline nature of ZIF-62 facilitates the reaction between water and PbBr2 to form PbBr(OH), which not only passivates the surface defects of the CsPbBr3 NCs but also prevents the perovskite from decomposing or oxidizing at high temperature. Sintering of ZIF-62 can therefore be performed in air at ∼300 °C to completely seal the perovskite within the insulating matrix, resulting in CsPbBr3/ZIF-62 composites exhibiting high stability against polar solvents, heat, light, and ambient humidity. Notably, the composite can maintain its bright luminescence without noticeable degradation in water for more than 2 months. The narrow-band emission and stability of these composites led to the demonstration of white light-emitting diodes with excellent color stability. Without the need for organic solvents during NC synthesis and noble gas ambient during sintering, the strategy proposed here can potentially facilitate the cost-effective, large-scale synthesis of highly stable perovskites which show great promise in commercial applications.
研究领域:
材料科学
·
纳米技术
·
光电技术
·
化学
✓ 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）