CHEMICAL PHYSICS LETTERS
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2023
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IF 2.8
Tieyan Li,Hang Yu,Jianguo Mi,Chunxi Li,Hong Meng,Junsu Jin
In this study, we prepared spherical MIL-160/PAA-NH 2 composites with high atmospheric water harvesting properties by dispersing MIL-160 in a highly hydrophilic porous polyacrylate (PAA-NH 2 ) matrix by in situ growth method. The effect of MOF loading on the crystal morphology, pore structure, and vapor adsorption/desorption properties was systematically investigated. The MOF loading of the composites can be as high as 65 wt%, along with a high water vapor adsorption capacity of 0.252 g/g at 15% of relative humidity, and can provide complete desorption under mild conditions. This work provides a new idea for efficient water harvesting at low humidity.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2024
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IF 4.8
Mengxiao Yan,Zhongli Peng,Wanwan Fu,Bingqiong Tan,Yanshu Luo
The facile synthesis MOFs monolith adsorbent is highly imperative for the economically friendly development of water adsorption. Herein, metal-organic framework material MIL-160 monolith was synthesized by the dry-gel conversion method at low temperature. The effects of curing conditions, dry-gel composition and crystallization temperature on crystal structure, porosity, microstructure and water vapor adsorption/desorption properties were studied. XRD results showed that the MIL-160 powder and monolith adsorbent can be synthesized under the condition that the molar ratio of dry-gel was Al 3+ : FDCA : NaOH = 1:1:2 at 60 °C (FDCA is the abbreviation of 2,5-Furandicarboxylicacid). The water vapor saturation adsorption capacity and water vapor desorption activation energy of the powder and monolith adsorbent were 0.310, 0.231 g/g at 20 % RH and 72.3, 62.4 kJ/mol, respectively. The convenient dry-gel conversion synthesis of MIL-160 monolith may provide a guidance for the manufacture of high-performance water harvest device.
研究领域:
材料科学
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化学工程
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Gankai Huang,Xinyi Huang,Junlin Huang,Xuye Hou,Youquan Zhang,Fang Lai,Ronghui Lin,Kangquan He,Qunhua Long,Hongbing Ji,Kungang Chai
Efficient purification of xylene isomers, particularly the separation of para- / meta -xylenes (PX/MX), is industrially crucial but challenging. Here, we report a classical aluminum-based metal–organic framework (MIL-160) that exhibits an exceptional meta-selectivity in liquid-phase competitive adsorption of xylene isomers. The outstanding separation performance of MIL-160 for xylene isomers is confirmed by dynamic breakthrough experiments. The PX eluted first and breakthrough of MX didn’t occur until a long retention times, which is in accordance with the results observed from static adsorption experiment. Molecular simulations and calculations suggested that the largest affinity of MIL-160 toward MX, potentially due to the good fitness between the 1D square-shaped channel and MX. To improve the productivity of purified PX in continuous separation mode, we speculated that combining the MX-selective property of MIL-160 and the previously reported ortho -xylene (OX)-selective property of CAU-23 can enhance the separation effect between PX and the other two isomers. So, MIL-160 and CAU-23 were filled simultaneously in column and the effect of mass ratio of them on PX productivity was investigated. The results indicated that when the mass ratio of MIL-160 versus CAU-23 was 4:6, MX and OX almost simultaneously eluted and reached saturation, which can maximize the productivity of PX. This study offers a feasible strategy for isolating PX from xylene isomer with low energy consumption and high efficiency.
研究领域:
化学工程
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材料科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Gankai Huang,Yubao Wang,Yan Du,Qunhua Long,Kungang Chai
Adsorption-based separation of 2-phenylethanol (2-PE) and 1-phenylethanol (1-PE) is crucial yet challenging in the petrochemical industry. In this study, we report that an ultra-micropore aluminum-based metal–organic framework (Al-MOF) (i.e., CAU-23) exhibits higher 2-PE/1-PE selectivity (6.12) and 2-PE adsorption capacity (2.52 mmol g −1 ) in liquid phase compared to its pseudo-isostructural analogue of Al-MOFs, MIL-160 and MOF-303 at 293 K. The micropore diffusion model was employed to give the best fit to the adsorption kinetics of the CAU-23 with a rate achieved higher than MIL-160 and MOF-303. Computational analysis confirmed that 2-PE preferential adsorption stems from CAU-23′s well-matched pore geometry which enables efficient molecular confinement. In combination of inspecting the static adsorption properties of 2-PE and 1-PE onto CAU-23, we found that the superior affinity of CAU-23 toward 2-PE over 1-PE originates from entropy and enthalpy effect. The remarkable 2-PE/1-PE separation capability of CAU-23 was confirmed through breakthrough curve analysis (separation factor ≈ 4). As the first Al-MOF developed for 2-PE/1-PE separation, CAU-23 offers valuable insights into the design of advanced 2-PE-selective adsorbents.
研究领域:
化学工程
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材料科学
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吸附技术
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分离科学
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计算化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Fan Luo,Xianghui Liang,Weicheng Chen,Shuangfeng Wang,Xuenong Gao,Zhengguo Zhang,Yutang Fang
MOF-based atmospheric water harvesting technology is a straightforward and practical strategy for producing safe drinking water . However, separate designs of high-adsorption desiccant skeletons and efficient photothermal layers are required to maximize water production efficiency. This work presents an integrated design of a multifunctional monolithic adsorbent through the layer-by-layer assembly of chitosan/polydopamine layers and hybridized MOF backbones on a glass fiber support. The hydrophilic hybridized MOF consisting of MIL-160(Al) and MOF-303 obtains the higher specific surface area (917.59 m 2 /g) and pore volume (0.44 cm 3 /g) through morphological reorganization for facilitating water capture and storage capacity. Especially in arid environments (RH ≤ 30 %), the resultant MOF has a superior moisture adsorption capacity (0.44 g/g) than parental MOF and other potential MOFs. The polymeric photothermal layer of adsorbent enables high solar thermal conversion in sunlight to assist the release of collected water. With fast sorption–desorption kinetics, an impressive outdoor water production of 0.94 g/g per day is observed in the designed monolithic adsorbent, indicating its enormous potential for safe, sustainable and scalable atmospheric water collection technology.
研究领域:
材料科学
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环境科学
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化学工程
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水资源管理
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DOI
高影响因子
危险品化学品经营许可证（带存储）