JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jinxin Wang,Yongzheng Zhang,Zixin Chen,Zhiqiang Zhou,Jitong Wang,Cheng Ma,Wenming Qiao,Zhi Xu,Licheng Ling
Lithium-sulfur (Li-S) batteries have attracted much attention due to their high specific capacity. However, at high loads and rates, the polysulfides conversion rate and ion transport of batteries are slow, limiting their commercialization. This work reports zero-dimensional (0D) bimetallic MOF derivatives grown in situ on two-dimensional (2D) MXene by electrostatic adsorption (FeCo@Ti 3 C 2 ). The 0D bimetallic structure effectively avoids the stacking of MXene while providing a dual catalytic site for polysulfides. The 2D structure of MXene also provides a large number of pathways for the rapid diffusion of lithium ions. This 0D-2D heterostructured heterogeneous catalyst with bimetallic synergistic active sites efficiently immobilizes and catalyzes polysulfides, providing a fast charge transfer pathway for the electrochemical reaction of lithium polysulfides. The Li-S battery with this multifunctional 0D-2D heterojunction structure catalyst has outstanding high rate capacity (703 mAh g −1 at 4 C at room temperature and 555 mAh g −1 at 2 C at 0 °C), fascinating capacity at high load (5.5 mAh cm −2 after 100 cycles at a high sulfur content of 8.2 mg cm −2 ). The study provides new ideas for the commercialization of high-efficiency Li-S batteries.
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高影响因子
MOLECULES
·
2024
·Vol. 29
·期 8
·1851
·
IF 4.2
Jian Yan,Wenjia Li,Yingyin Yu,Guangyu Huang,Junjie Peng,Daofei Lv,Xin Chen,Xun Wang,Zewei Liu
Atmospheric water harvesting (AWH) is considered a promising strategy for sustainable freshwater production in landlocked and arid regions. Hygroscopic salt-based composite sorbents have attracted widespread attention for their water harvesting performance, but suffer from aggregation and leakage issues due to the salting-out effect. In this study, we synthesized a PML hydrogel composite by incorporating zwitterionic hydrogel (PDMAPS) and MIL-101(Cr) as a host for LiCl. The PML hydrogel was characterized using various techniques including X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR), and thermogravimetric analysis (TGA). The swelling properties and water vapor adsorption-desorption properties of the PML hydrogel were also assessed. The results demonstrate that the MIL-101(Cr) was uniformly embedded into PDMAP hydrogel, and the PML hydrogel exhibits a swelling ratio of 2.29 due to the salting-in behavior. The PML hydrogel exhibited exceptional water vapor sorption capacity of 0.614 g/g at 298 K, RH = 40% and 1.827 g/g at 298 K, RH = 90%. It reached 80% of its saturated adsorption capacity within 117 and 149 min at 298 K, RH = 30% and 90%, respectively. Additionally, the PML hydrogel showed excellent reversibility in terms of water vapor adsorption after ten consecutive cycles of adsorption-desorption. The remarkable adsorption capacity, favorable adsorption-desorption rate, and regeneration stability make the PML hydrogel a potential candidate for AWH. This polymer-MOF synergistic strategy for immobilization of LiCl in this work offers new insights into designing advanced materials for AWH.
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CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Chengming Guo,Pengtao Guo,Youbin Zhou,Xin Yan,Huifang Li,Dahuan Liu
Porous adsorbents are widely used for the adsorptive separation of carbon dioxide (CO 2 ) from gas mixtures, offering a promising solution to address both the energy crisis and environmental issues. However, developing highly efficient CO 2 selective adsorbents has been challenging due to the similar physicochemical properties of CO 2 and other gases. To overcome this challenge, we herein have developed a core–shell composite utilizing ionic liquids (ILs) and metal–organic frameworks (MOFs) based on the dissolution-diffusion mechanism. The unique solubility differences of ILs for various gas molecules, particularly their strong solubility for CO 2 , allow only CO 2 to be adsorbed while excluding other gases. As a result, the composite exhibits a remarkable separation selectivity for CO 2 /C 2 H 2 , CO 2 /CH 4 and CO 2 /N 2 . Breakthrough experiments have verified the outstanding performance of this core–shell composite in separating gas mixtures containing CO 2 impurities. Remarkably, this composite can be synthesized by a simple method, which is more practical for large-scale production.
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Materials Today Communications
·
2024
·
IF 3.7
Cheng-rui Xie,Yi-xuan Song,Gang Yang,Cheng-gong Sun,Xiang Luo,Tao Wu
The increasing presence of synthetic dyes in wastewater poses a serious environmental threat, necessitating the development of efficient adsorbents for their removal. In this study, a highly porous carbonaceous adsorbent, Fe@C-350, was synthesized through direct carbonisation of MOF-235 under an argon atmosphere for efficient removal of methyl orange from wastewater. Compared to MOF-235, Fe@C-350 retains the inherent structure of MOF-235 while exhibiting a larger BET surface area and increased pore size. The use of Fe@C-350 as an adsorbent in methyl orange adsorption demonstrates exceptional adsorption capabilities over a broad pH range with a maximum adsorption capacity of 1666.7 mg·g −1 . The isotherm analyses indicate that the adsorption process is primarily determined by monolayer physical adsorption. The kinetic studies revealed a rapid adsorption rate, characterized by a high-rate constant of 0.025 g·mg −1 ·min −1 . This can be attributed to the suitable pore size and abundant adsorption sites that facilitate the removal of methyl orange. Further investigation confirmed that Fe@C-350 retained over 98 % of its initial adsorption capacity after 10 regeneration cycles, thus confirming physical adsorption as the fundamental mechanism. Based on these findings, it can be concluded that Fe@C-350 is of significant potential as a promising candidate for the efficient removal of methyl orange from dye-containing wastewater. However, future research is necessary to show its application to the removal of a broader range of contaminants, aiming at enhancing its environmental impact and industrial viability.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Wangfei Yu,Guannan Wang,Huizhi Chen,Honglei Mu,Ben Niu,Yanchao Han,Lishu Wang,Hangjun Chen,Haiyan Gao
To address the poor hydrolytic stability of CD-MOF in food applications, CD-MOF loaded with thymol (TCDM) was prepared and filled into a pectin (PEC)/sodium alginate (SA) substrate with the aid of zein to obtain a thymol-CD-MOF/zein-PEC-SA (TCDM/ZPS) polymer film. Characterization revealed that zein-PEC/SA (ZPS) protected TCDM by forming amphiphilic microspheres. TCDM was able to exist stably in the hydrophilic polysaccharide substrate and achieve a long-term slow release over 336 h. Besides, environmental humidity could also be used as a switch for regulating the thymol release rate, which was consistent with the first-order release model (R 2 > 0.99). TCDM and TCDM/ZPS showed excellent antimicrobial effects against E. coli , S. aureus , and B. cinerea , the most common fungi in plant-based foods. The preservation experiment maintained the quality of strawberry and Agaricus bisporus mushroom. This strategy holds the potential to broaden the application scope and enhance the utility of CD-MOF in food preservation.
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Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 12
·7178-7186
·
IF 10.7
Haiyuan Li,Dingxin Liu
In photocatalysis, catalysts are crucial for effective charge transfer and separation. Using Mo-MOF and CdCo-MOF as precursors, we have designed an effective Cd0.76Cd0.17Mo0.07S (Ethy-CCMS) photocatalyst. We compared the performance of samples prepared in different environments and found that the rod-shaped Ethy-CCMS prepared in an alkaline environment provided by ethylenediamine exhibited the highest photocatalytic hydrogen production activity with an efficiency of 30.14 mmol g−1 h−1, which was 32.2 times higher than that of the CdS prepared under aqueous solution conditions. The solid solution formed can accelerate the separation of photogenerated electrons and avoid the formation of high oxidation power h+ compared to CdS alone. In addition, adding Mo and Co enables these three metals to form bonds with S. The shared S-bond improves the stability of the material and significantly mitigates the photocorrosion phenomenon. This study investigates the role of sulfides derived from Mo-MOF and CdCo-MOF as sustainable and promising co-catalyst candidates to enhance the photocatalytic performance of CdS-based composites.
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CARBON
·
2024
·
IF 10.5
Xiaohan Wu,Jingyu Lin,Yu He,Ruoqi Wang,Yukang Zhou,Huimin Qi,Yi Chen,Peiyuan Zuo,Xiaoyun Liu,Qixin Zhuang
The controllable self-assembly of Metal Organic Frameworks (MOFs) crystals plays a vital role in modulating the performance for microwave absorbers. However, most current strategies require colloidal or intricate chemical modifications of nanoparticles , thereby increasing the complexity of structural construction and impeding the broader application of microwave absorbers. To resolve this tough issue, we herein innovatively propose a more easily achievable electrostatic-manipulated self-assembly strategy. By readily manipulating the electrostatic adsorption and repulsion between particles, the aggregation and growth sites of initial MOF crystals are anchored, hence facilitating to the construction of solid-core/shell and hollow porous microstructures for absorbers. The substantial improvement depending on electrostatic effects is clearly observed in experimental results. It demonstrates that the Co@hollow N-doped carbon spheres (Co@HNCSs) absorber, induced by electrostatic repulsion , shows the best overall absorption performance , with a strong absorption of −65.4 dB at a thickness of 1.9 mm and an effective absorption bandwidth (EAB) of 5.4 GHz at a thickness of 1.6 mm, covering almost the entire Ku band. The influence of these strategies on the electromagnetic response mechanisms is further comprehensively discussed. Accordingly, we believe this strategy offers new insights for the MOFs’ structural absorbers via electrostatic-manipulated self-assembly strategy.
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Nanomaterials
·
2025
·Vol. 15
·期 4
·279
·
IF 4.3
Yuning Li,Xinya Wang,Weiqiu Huang,Xufei Li,Ping Xia,Xiaochi Xu,Fangrui Feng
Membrane technology has been widely used in industrial CO2capturing, gas purification and gas separation, arousing attention due to its advantages of high efficiency, energy saving and environmental protection. In the context of reducing global carbon emissions and combating climate change, it is particularly important to capture and separate greenhouse gasses such as CO2. Zr-MOF can be used as a multi-dimensional modification on the polymer membrane to prepare self-assembled MOF-based mixed matrix membranes (MMMs), aiming at the problem of weak adhesion or bonding force between the separation layer and the porous carrier. When defective UiO-66 is applied to PVDF membrane as a functional layer, the CO2separation performance of the PVDF membrane is significantly improved. TUT-UiO-3-TTN@PVDF has a CO2permeation flux of 14,294 GPU and a selectivity of 27 for CO2/N2and 18 for CO2/CH4, respectively. The CO2permeability and selectivity of the membrane exhibited change after 40 h of continuous operation, significantly improving the gas separation performance and showing exceptional stability for large-scale applications.
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高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·Vol. 38
·期 7
·e7542
·
IF 3.7
Zhiwei Liu,Liying Wang,Shanghai Dong,Lu Li,Jingjing Wang,Zhenzhu Cao,Yongfeng Zhang,Lin Cheng,Jucai Yang
Three distinct morphologies of Bi-MOFs were innovatively employed as carriers, facilitating the formation of heterojunctions with BiPO 4 . Among these, the optimal photocatalytic performance was demonstrated by the type II heterojunction BiPO 4 /CAU-17. Bi 3+ competitively coordinated to crucially aid CAU-17's transformation into a heterojunction, enhancing interfacial contact in BiPO4/CAU-17. These photocatalysts effectively degraded dyes (RhB, MO, MB) and tetracycline (TC) under light exposure. RhB degradation was 3.33 times faster with BiPO 4 /CAU-17 than BiPO 4 , 1.45 times faster than FCAU-17, 1.36 times faster than FRCAU-17, and 1.32 times faster than CAU-17. Analyzing carrier density, Fermi level, and band structure through VB-XPS, UV–VIS, and Mott–Schottky provided insights into enhanced separation of photoexcited electron–hole pairs. This study presents a novel approach to tackle the aggregation challenge of the wide-bandgap material BiPO 4 by using suitable MOFs as carriers. It offers valuable perspectives for the design and application of photocatalysts in environmental remediation.
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TALANTA
·
2025
·
IF 6.1
Yin-Xia Sun,Xue Bai,Ai-Ping Luo,Yu Sun,Zhe-Peng Deng,Wan-Hong Sun,Wen-Yu Han
Quinolone antibiotics pose a threat to health and the environment due to their difficulty in decomposition and misuse. A novel fluorescence composite material CQD x @Co/Mn-MOF has been developed, which uses cobalt (Co) and manganese (Mn) as metal centers and 1,3,5-triazobenzene as organic ligands. Meaningfully, CQD x @Co/Mn-MOF can be designed as a ratiometric fluorescence sensor for detecting quinolone antibiotics, especially norfloxacin (NFX). In a series of CQD x @Co/Mn-MOF, CQD 6μL @Co/Mn-MOF sensor exhibits good linearity within the NFX concentration range of 1–4 × 10 −5 M, with a detection limit of 0.70 μM. Compared with Co/Mn-MOF, introducing CQDs significantly reduces the detection limit from 3.50 μM to 0.70 μM and increases the detection sensitivity by five times. The CQD 6μL @Co/Mn-MOF sensor exhibits fast response time (2 s), high selectivity and sensitivity to NFX, making it an ideal ratiometric fluorescent sensor for the detection of these antibiotics. Based on its excellent detection performance, the sensor was further applied to the quantitative determination of NFX in chicken, beef and honey samples and satisfactory results were obtained with recoveries ranging from 97.51 % to 108.60 %. In addition, based on CQD 6μL @Co/Mn-MOF test strips, convenient and real-time detection of quinolone antibiotics has been achieved. In conclusion, the CQD 6μL @Co/Mn-MOF ratiometric fluorescent sensor provides a reliable, sensitive and efficient analytical method for the detection and evaluation of trace NFX in food, which is of great significance for ensuring food safety and public health.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Binxuan Diao,Chenhao Cong,Fenglin Sun,Hongjiang Li,Haoran Zhang,Xuhao Wang,Mingliang Jin,Sooman Lim,Xinlin Li,Se Hyun Kim
The self-stacking propensity of metal–organic frameworks (MOFs) during synthesis, combined with their intrinsic limitations in electrical conductivity and mechanical stability, constrains their utility as high-capacity energy sources in wearable electronics. Here, we employ a surfactant-assisted method to mitigate the Z-axis stacking of zinc metalloporphyrin organic frameworks (NMOFs), yielding ultrathin two-dimensional (2D) material sheets. By integrating carboxyl multiwalled carbon nanotubes into these nanosheets (denoted as C-NMOF-x), the lamellar structure of MOF is preserved while promoting the formation of rich multistage micropores and continuous conductive channels. This structural refinement remarkably enhances electrochemical properties, including capacitance, electronic conductivity, and cycling stability. Leveraging synergistic interactions, the resulting C-NMOF-4 composite achieves a specific capacitance of 0.152 mAh/g in a three-electrode system at a current density of 1 A/g. Furthermore, the modulated C-NMOF-4 composites are successfully formulated into homogeneous e-inks suitable for dispensing printing, enabling the mass production of flexible micro-supercapacitors (MSCs). Notably, these MSCs maintain 95 % of their capacitance even after 180° bending under wearable conditions. This surface and interface microstructure modulation strategy holds promise for enhancing the synergistic coupling effects of 2D materials and offers new avenues for the application of innovative 2D materials in wearable electronics.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Panpan Liu,Jiafei Lyu,Peng Bai
MOFs/polymer hybrid membranes combine the unique structural activity of MOFs with the excellent carrying capacity of porous polymers, exhibiting remarkable adsorption/separation properties. In this study, a robust defective MOFs material Al-UiO-66 was synthesized by doping Al into UiO-66 material through one-step in-situ synthesis method, which increased the pore size distribution of MOF material. Al-UiO-66 nanoparticles were blended within polyvinylidene fluoride (PVDF) casting solution to fabricate a novel Al-UiO-66-MMM using the phase conversion techniques. The Al-UiO-66-MMM demonstrated excellent solid–liquid separation, avoiding the shortcomings of MOFs such as potential secondary pollution and poor separation performance. It was investigated for the adsorptive removal of six typical dyes with different charges and molecular sizes including cationic Malachite Green (MG), Rhodamine B (RhB), Janus Green B (JGB) and anionic Methyl Orange (MO), Methyl Yellow (MY) and Reactive Black 5 (RB5). Al-UiO-66-MMM exhibited much enhanced removal rates exceeded 99 % for MO, MY, and MG while low adsorption for large molecular dyes RhB, JGB, and RB5, indicating a size exclusion effect. In the separation process of binary mixed dyes with different molecular sizes, the removal rates of the target dyes all reached around 99 %, demonstrating excellent selective adsorption. Additionally, the membrane exhibited outstanding recyclability with over 90 % removal rate with high selectivity after 10 cycles. The outstanding stability, efficient selectivity, sustained cyclic adsorption performance, and good portability, makes Al-UiO-66-MMM highly promising for applications in treating dye-containing wastewater.
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