JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Po-Chun Wu,Ho Jun Lee,Yi-Fan Lin,Kuo-Lun Tung,Jong Suk Lee,Dun-Yen Kang
Carbon capture is widely recognized as a pivotal technology for alleviating the accelerating impacts of global warming. Mixed matrix membranes (MMMs) that embed metal organic frameworks (MOFs) offer a compelling route to high-performance separations, and MOF-808 stands out among them because of its outstanding chemical stability and environmentally friendly synthesis. In this study, the defect density of MOF-808 was tuned by varying the formic acid modulator: Higher modulator loading produced MOF-808 with higher linker defect density. After synthesis, MOF-808 was washed with either water or ethanol and then incorporated into PEBAX matrix through a drying-free process that ensured uniform dispersion. Washing with ethanol altered the pore coordination environment of MOF-808, partially replacing formate with ethoxide. Introducing an appropriate amount of formic acid created additional open metal sites and increased both CO 2 permeability and CO 2 /N 2 selectivity; however, excessive formic acid produced too many defects, causing severe pore blockage and consequently lowering the CO 2 permeability. The drying-free method, by preventing MOF aggregation and ensuring homogeneous dispersion, led to a 38 % increase in CO 2 /N 2 selectivity compared with the conventional drying method. The ethoxide substitution induced by ethanol washing occupied part of the pore volume, leading to a reduction in CO 2 permeability. The optimized MOF-808/PEBAX MMM achieved a CO 2 permeability of 150 Barrer and a CO 2 /N 2 selectivity of 76.4, both markedly higher than those of the pristine polymer. These results highlight a sustainable, scalable strategy for producing high-efficiency membranes for post-combustion CO 2 capture.
研究领域:
材料科学
·
化学工程
·
环境科学
·
膜分离技术
·
可持续能源
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Haojun Jiang,Qilong Liao,Yibo Zhou,Laibao Liu,Fu Wang,Hanzhen Zhu,Yong Dan,Peng Zhao,Xianpan Shi
With the rapid development of the lithium battery industry, the resource utilization of lithium slag (LS) has become an urgent issue. Porous ceramic supports are fabricated herein using LS and α-Al 2 O 3 as the primary raw materials, with cornstarch serving as a pore-forming agent. The effects of raw material composition and sintering temperature on the structure and performance of the supports are systematically investigated. The optimal performance is achieved with an LS to α-Al 2 O 3 mass ratio of 6:4, a cornstarch content of 3.0 wt%, and a sintering temperature of 1200 °C. Under these conditions, the ceramic support exhibits an open porosity of 39.0 %, an average pore size of 0.66 μm, and a flexural strength of 40.9 MPa. At a filtration pressure of 0.52 bar, the water flux reaches 8029 L/(m 2 h bar) and the support shows excellent resistance to acidic and alkaline conditions. The turbidity of tap water decreased from 0.53 to 0.28 NTU after filtration, indicating that the ceramic support effectively removed larger suspended particles and improved the quality of the effluent. This study therefore provides a novel approach for the resourceful utilization of LS and offers a cost-effective solution for water treatment.
研究领域:
材料科学
·
陶瓷
·
环境工程
·
废弃物资源化利用
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Haiqiang Ma,Bo Yin,Tong Ye,Ishioma Laurene Egun,Yafei Li,Xianglan Zhang,Haiyong He
Hard carbon rich in closed pores is considered a highly promising anode candidate for advanced sodium-ion batteries (SIBs). Nevertheless, the precise regulation of closed pore structures is significantly impeded by the structural complexity of hard carbon. In this study, a hard carbon with tunable closed-pore architecture was constructed by using ZIF-8-derived porous carbon with uniform pore size (~0.8 nm) and adjustable pore structure as the substrate. Carbonization temperature control and a chemical vapor deposition (CVD)-based pore-sealing strategy were combined to tailor the pore structure and optimize sodium storage performance. The results revealed that the size and number of closed pores are determined by the open-pore characteristics of the carbon substrate; specifically, substrates with larger micropores and higher specific surface areas promote the development of a greater number of closed pores of larger diameters. Benefiting from the optimized closed-pore architecture, the sample ZCHC-1200 exhibits outstanding electrochemical performance, delivering a high reversible capacity of 436.5 mAh g −1 , with a plateau capacity of 265 mAh g −1 . At a high current density of 2C, it provides 236.8 mAh g −1 and retains 86.5 % of its capacity after 100 cycles. In situ Raman and ex situ X-ray photoelectron spectroscopy (XPS) analyses revealed that the predominant contributor to the elevated plateau capacity is Na + filling within closed pores. This study offers a novel strategy for designing closed pores through open-pore modulation, shedding light on the development of next-generation hard carbon anodes for SIBs.
研究领域:
材料科学
·
储能
·
电化学
·
纳米材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
·
2022
·Vol. 259
·期 7
·2100543
·
IF 1.782
Jing Zhang,Yuqing Cao,Chen Chen,Qiang Wang,Yabin Shao
2D black phosphorus nanosheets (BPNSs) are prepared by the ultrasonic-assisted liquid phase stripping method, which improves the preparation yield and monodispersity of the thin-layer BPNSs. Open-aperture Z-scan measurement by nanosecond pulsed laser with low repetition rate (10 Hz) is used to reduce the existence and accumulation of heat accumulation effect. BPNSs have strong saturated absorption in the wideband visible light range from 475 to 625 nm; and with the increase of laser energy, reverse saturated absorption (RSA) occurs at some specific wavelengths in this range. The reverse saturation absorption is observed at 500 nm; and the stronger the excited state absorption is with the increase of laser energy, the more obvious the reverse saturation absorption is. At 525 nm, as the laser excitation energy increases from 750 to 1080 μJ, a transition from saturated absorption to anti-saturated absorption is observed. This shows that laser excitation energy is an important factor in the transition from saturated absorption to anti-saturated absorption. That is to say, by controlling the laser excitation energy and wavelength, BPNSs can have different application values in the field of nonlinear optics, such as saturable absorbers, optical limiters, and optical switches.
研究领域:
材料科学
·
光学
·
纳米技术
·
光子学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）