Materials Today Chemistry
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2024
·
IF 6.7
Deshuang Lu,Zhonghan Cheng,Nikom Klomkliang,Wanida Koo-amornpattana,Francis Verpoort,Somboon Chaemchuen
Organic linkers are typically controlled to create the micropore structure when synthesizing metal-organic frameworks (MOFs). However, developing a hierarchical pore structure is beneficial for improving the efficiency of MOFs in various applications. This study investigates a green strategy using a water modulator that competes with the terephthalic ligand to coordinate with zirconium clusters, thereby accessing open sites for hierarchical micro- and mesopores in UiO-66. Using a hydro-modulator induced the formation of a mesoporous structure and enhanced the hydrophilic properties of UiO-66-X due to the presence of hydroxyl groups. Also, model calculations using density functional theory (DFT) support the observed structural chemical geometry. The advantages of a hierarchical pore structure, increased hydrophilicity, and the presence of open sites in the robust structure of UiO-66-X led to a significant enhancement in both antibiotic adsorption and the catalytic activity of ring-opening epoxide reactions compared to the pristine microporous UiO-66. Therefore, utilizing water as a green modulator presents a simple and environmentally friendly approach to introducing hierarchical pore structures in MOFs. It offers a promising strategy for enhancing their performance across various applications.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jiang Liu,Bingxue Chen,Yukun Huang,Yijun Cao,Jingbo Chen,Liqiang Wang,Yan Liu,Yangyang Fan
Indium, a strategic key metal, is mainly recovered from zinc leaching residue. However, a challenging problem in the treatment of zinc leaching residue is how to efficiently and cleanly treat the poorly soluble phase, the indium-bearing zinc ferrite (IBZF). Here, we propose a novel strategy for the selective extraction of indium , zinc and iron from IBZF. By introducing water to regulate the coordination environment of a choline chloride-anhydrous oxalic acid based deep eutectic solvent (ChCl-Oxa based DES), efficient leaching and deep separation of indium , zinc and iron were achieved. Water, acting as both co-solvent and diluent, played a critical role in the whole process. The addition of a little water reduces the viscosity of the DES, thereby improving the leaching of indium , zinc and iron. Under specific leaching conditions (leaching temperature of 90 °C, liquid/solid ratio of 20:1 ml/g, molar ratio of ChCl:Oxa = 1:1, molar ratio of DES:H 2 O = 1:3 and reaction time of 3.5 h), the leaching efficiencies of indium, zinc and iron were 96.27 %, 95.55 % and 96.33 %, respectively. The subsequent addition of large amounts of water dilutes and dissociates the structure of the DES, facilitating the stepwise precipitation and deep separation of metal ions. The precipitation efficiency of zinc and iron reached 93.06 % and 98.07 %, respectively. Residual indium ions in the solution were effectively adsorbed by activated carbon, with a recovery efficiency of 75.7 % after five cycles of adsorption. The solution separated from the metal ions was well regenerated by evaporation and addition of Oxa. Our work represents a novel approach for the recycling and clean utilization of zinc leaching residue. And the regulation of the coordination environment of metal ions in DES is proved to have great potential in metal recycling.
研究领域:
冶金工程
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环境科学
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Wenzhe Xiao,Ting He,Qigang Wang,Xiaoning Wang,Yue Lu,Weidong Zhao,Jipeng Yan,Jian Sun
Low-hysteresis merits in polymeric gel materials can significantly enhance their operational reliability and service lifetime in emerging applications such as smart wearable devices. However, fabricating gel materials with low hysteresis and high toughness remains challenging due to their intrinsic contradictory attributes, particularly in ionic liquid (IL)-based systems. Herein, a water-mediated polymer network reorganization strategy is presented for developing tough and low hysteresis ionohydrogels (IHGs) containing ILs, where the synergistic effect between covalent crosslinking and dynamic interfacial lubrication governs their exceptional performance. Water can act as a lubricating mediator to moderately attenuate interactions between ILs and polymer chains, thereby enabling the formation of dynamically adaptive networks that facilitate chain mobility and stress redistribution. Therefore, the IHGs fabricated through water content modulation achieve a well-balanced combination of high toughness (2.2 MJ m −3 ) and low hysteresis (8.1% at 400% strain). Meanwhile, the prepared IHGs demonstrate superior comprehensive performance, including high stretchability, excellent tensile strength, superior electrical conductivity, good biocompatibility, and transparency. Finally, the IHGs can function as high-performance wearable sensors and biocompatible epidermal electrodes, enabling real-time health monitoring and acquisition of high-fidelity electrophysiological signals. The simple strategy overcomes the traditional trade-offs of low hysteresis and high toughness, demonstrating exceptional potential in real-life scenarios.
研究领域:
材料科学
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生物医学工程
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智能穿戴设备
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DOI
高影响因子
Reaction Chemistry & Engineering
·
2021
·Vol. 6
·期 11
·2159-2169
·
IF 4.239
Zifei Yan,Chencan Du,Guangsheng Luo,Jian Deng
Glycidyl esters are synthesized through the epoxide ring-opening reactions, and the reaction efficiency must be greatly improved for green and efficient production. In this work, the structure of the side product that caused the decline of selectivity was confirmed by GC-MS and 1H NMR. The formation mechanism of the side product was unraveled, indicating that the relative rates of the parallel competing reactions towards the conversion of an intermediate was a key factor in selectivity. It was found that water as a proton transfer carrier can effectively facilitate the conversion of the intermediate to the target product, thus successfully suppressing the side reactions. The water content of 8–10 wt% in the reaction system was proved to be the optimized range. Relying on the function of water, the ring-opening reaction can be performed at 100 °C instead of 70 °C, and epichlorohydrin (ECH) could be directly fed in the reaction system once instead of dripping for 1 hour. Thus, the reaction time could be reduced from 6 hours to 1 hour, and the product selectivity could be maintained higher than 98%. The industrial production process further proved the effectiveness of this strategy in terms of broadening the temperature range for the highly selective synthesis of glycidyl esters and reducing the scale-up effect.
研究领域:
化学工程
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绿色化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2018
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IF 6.735
Lujun Yu,Qixin Yang,Jinlong Liao,Yaofeng Zhu,Xiang Li,Wentong Yang,Yaqin Fu
Three-dimensional (3D) porous structure has attracted considerable interest owing to its flexibility, low density and potential applications. Here, Ag@PPy sponge was synthesized via solvothermal, in situ polymerization and freeze-drying techniques. The Ag@PPy sponge exhibits well elasticity and water absorption capacities due to the 3D network structure. The microwave absorption properties of the Ag@PPy sponge were measured by coaxial line and wave guide methods. The results show that the effective bandwidth (reflection loss values of less than −10 dB) of the Ag@PPy sponge without resin or paraffin matrix could cover the whole X-band (8.2–12.4 GHz) at the thickness of 5 mm. Besides, the complex permittivity of the Ag@PPy sponge can be modulated by adjusting the water ratios from 0 to 78.4 wt%. When the water ratio is 26.2 wt%, the Ag@PPy-26.2 sponge exhibits optimal microwave absorption properties, which the minimum reflection loss ( RL ) value reaches −33 dB at 8.8 GHz with the thickness of 3 mm. Our research provides a new strategy to design microwave absorbers by using water.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Jiajun Yu,Xiao Wang,Guanhong Lu,Haijiao Xie,Xiaofeng Xie,Jing Sun
The purification of oxygenated volatile organic compounds VOCs (OVOCs), important precursors of ozone and particulate matters, has triggered intensive research interests. UiO-66 with high photocatalytic activity have shown great potential. However, the lack of active sites severely limited the trapping and degradation of OVOCs. Herein, reo-UiO-66 with increased specific surface area, hierarchical porous structure and tunable acidic/basic sites was synthesized by simply adding water as the modulator. XRD, TGA and FTIR results confirmed the formation of reo-defects, which significantly affected the surface hydrophilicity and active sites of UiO-66. The adsorption of Lewis acidic acetaldehyde was enhanced by 265 times with coordinative unsaturated Zr acting as the dominant adsorption sites. The degradation efficiency of typical OVOCs (acetaldehyde and acetone) increased from 0% and 25% to 50% and 73%, respectively. This work provided a facile method to modulate the micro-environment in MOFs for the efficient capture and catalytic purification of OVOCs.
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
PubMed
高影响因子
APPLIED ENERGY
·
2018
·
IF 7.9
Heng Zhang,Hu Li,Hu Pan,Anping Wang,Sadra Souzanchi,Chunbao (Charles) Xu,Song Yang
Biodiesel, typically produced from non-food crops with heterogeneous catalysts, deems to be a promising and sustainable alternative biofuel to petroleum-derived fuels. In this study, to improve biodiesel production process efficiency by acids, biodiesel production were successfully developed using a series of magnetically acidic poly(ionic liquid) catalysts with varying hydrophobicity and controllable acidity. The detailed characterization results demonstrated that the FnmS-PIL (1a, C8) core-shell structure catalyst had large Bruner Emmett and Teller (BET) surface area (128.1 m 2 /g), uniform mesoporous structure (4.2 nm), strong magnetism (12.4 emu/g), a high number of acid sites (2.14 mmol/g), strong acid strength (strong electron-withdrawing anion CF 3 SO 3 − effect, −8.2 < H 0 < −5.6) and strong hydrophobicity (water contact angle, 115.4°). For the biodiesel production, high biodiesel yields could be achieved by the esterification of oleic acid (by response surface methodology, RSM) and (trans)esterification of crude Euphorbia lathyris L. oils with an acid value of 24.59 mg KOH/g (by single factor optimization). Furthermore, a relative kinetic study was conducted wherein the activation energy was calculated as 39.2 kJ/mol and a pseudo-first-order model was determined for esterification. More importantly, the FnmS-PIL (1a, C8) catalyst was separated simply using a magnet and exhibited constant activity with biodiesel yield of 87.5% after five cycles in (trans)esterification. In addition, the biodiesel yield was maintained above 90% even with a water content of 6 wt% with respect to crude Euphorbia lathyris L. oils, and the fuel properties of Euphorbia lathyris L. biodiesel were found to satisfy the EN 14212 and ASTM D6751 standards, highlighting its potential in industrial biodiesel production as derived from crude non-food oil resources.
研究领域:
化学工程
·
可再生能源
·
催化科学
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产品关联
DOI
高影响因子
ACS Nano
·
2023
·
IF 17.1
Shengshun Duan,Qiongfeng Shi,Jianlong Hong,Di Zhu,Yucheng Lin,Yinghui Li,Wei Lei,Chengkuo Lee,Jun Wu
Electronic skin (e-skin), mimicking the physical–chemical and sensory properties of human skin, is promising to be applied as robotic skins and skin-attachable wearables with multisensory functionalities. To date, most e-skins are dedicated to sensory function development to mimic human skins in one or several aspects, yet advanced e-skin covering all the hyper-attributes (including both the sensory and physical–chemical properties) of human skins is seldom reported. Herein, a water-modulated biomimetic hyper-attribute-gel (Hygel) e-skin with reversible gel–solid transition is proposed, which exhibits all the desired skin-like physical–chemical properties (stretchability, self-healing, biocompatibility, biodegradability, weak acidity, antibacterial activities, flame retardance, and temperature adaptivity), sensory properties (pressure, temperature, humidity, strain, and contact), function reconfigurability, and evolvability. Then the Hygel e-skin is applied as an on-robot e-skin and skin-attached wearable to demonstrate its highly skin-like attributes in capturing multiple sensory information, reconfiguring desired functions, and excellent skin compatibility for real-time gesture recognition via deep learning. This Hygel e-skin may find more applications in advanced robotics and even skin-replaceable artificial skin.
研究领域:
材料科学
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机器人技术
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生物医学工程
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可穿戴技术
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人工智能
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）