Heliyon
·
2024
·
IF 3.4
Yige Yan,Mohan Huang,Yongsheng Wang,Dawei He,Jiaqi He
Metal-organic frameworks (MOF) have been wildly synthesised and studied as electrode materials for supercapacitors, and bimetallic MOF of Ni and Co has been broadly studied to enhance both specific capacitance and stability of supercapacitors. Herein, a best performance (about 320 F/g) of Ni–Co bimetallic MOF was found in a uniform preparation condition by adjusting the ratio of Ni to Co. Then tiny third metal ion was introduced, and we found that the morphology of material has a significant change on the original basis. Furthermore, certain ions (Zn, Fe, Mn) introduced make a huge improvement in capacitance based on Ni–Co MOF of 320 F/g. The result shows that Zn–Ni–Co MOF, Fe–Ni–Co MOF and Mn–Ni–Co MOF perform specific capacitance of 1135 F/g, 870 F/g and 760F/g at 1 A/g, respectively. Meanwhile, the asymmetric supercapacitor (ASC) was constructed by Zn–Ni–Co MOF as positive electrode and active carbon (AC) as negative electrode. The Zn–Ni–Co MOF//AC ASC possesses a energy density of 58 Wh/kg at a power density of 775 W/kg. This research provides a new methods to regulate the morphology of MOF and a novel viewpoint for assembling high-performance, low-price, and eco-friendly green energy storage devices.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Junlei Zheng,Lin Nie,Yukui Tong,Miaomiao Tian
Ribavirin (RBV) in food and environmental samples presents significant risks to human health, necessitating the development of methods capable of its simultaneous detection and adsorption. This study describes the preparation of a multi-functional molecularly imprinted material (Nylon@Eu-MOF@MIPs), achieved through in-situ growth of Eu-MOF with fluorescence properties on a nylon membrane, designed for the concurrent adsorption and detection of RBV. The material demonstrates high adsorption capacity for RBV (41.36 mg g −1 ), a pronounced imprinting effect (imprinting factor of 3.06), and substantial sensitivity (detection limit of 0.01 μM). Furthermore, following ten adsorption–desorption cycles, Nylon@Eu-MOF@MIPs retain effective adsorption capacity, with a minimal loss of 5.8 %. Additionally, a filtration-enhanced adsorption and detection mode is proposed, achieving a 1.63-fold increase in adsorption capacity compared to the traditional soaking method. The integrated platform developed in this study facilitates efficient adsorption and visual detection of RBV. This research not only advances membrane separation materials but also establishes foundational conditions for creating integrated systems for simultaneous adsorption and visual detection.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 6
·1-12
·
IF 5.3
Shen Hao,Tang Yan,Ma Hongmei
The high-residual and bioaccumulation property of organophosphorus pesticides (OPs) creates enormous risks towards the ecological environment and human health, promoting the research for smart adsorbents and detection methods. Herein, 2D hemin-bridged MOF nanozyme (2D-ZHM) was fabricated and applied to the efficient removal and ultrasensitive dual-mode aptasensing of OPs. On the one hand, the prepared 2D-ZHM contained Zr-OH groups with high affinity for phosphate groups, endowing it with selective recognition and high adsorption capacity for OPs (285.7 mg g −1 for glyphosate). On the other hand, the enhanced peroxidase-mimicking biocatalytic property of 2D-ZHM allowed rapid H 2 O 2 -directed transformation of 3,3′,5,5′-tetramethylbenzidine to oxidic product, producing detectable colorimetric or photothermal signals. Using aptamers of specific recognition capacity, the rapid quantification of two typical OPs, glyphosate and omethoate, was realized with remarkable sensitivity and selectivity. The limit of detections (LODs) of glyphosate were 0.004 nM and 0.02 nM for colorimetric and photothermal methods, respectively, and the LODs of omethoate were 0.005 nM and 0.04 nM for colorimetric and photothermal methods, respectively. The constructed dual-mode aptasensing platform exhibited outstanding performance for monitoring OPs in water and fruit samples. This work provides a novel pathway to develop MOF-based artificial peroxidase and integrated platform for pollutant removal and multi-mode aptasensing. Graphical Abstract
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xinjian He,Cunmin Wang,Yaxin Hao,Jiaqi Li,Guiying Zhu,Liang Jiang,Jiang Shao,Mingming Zhang,Xiao-Peng Li,Heguo Li,Huan Xu
The wide use of conventional polymeric air filters is causing a dramatically increasing accumulation of plastic and microplastic pollution. The development of poly(lactic acid) (PLA) fibrous membranes for efficient air purification is of important significance but frequently challenged by the rapid decay of filtration performance due to the intrinsically poor electret properties of PLA. Here, we propose an electroactivity promotion methodology, involving the one-step synthesis and homogeneous incorporation of high-dielectric ZIF-8 nanosheets (ZIFNSs), to facilitate interfacial polarization and fiber refinement during electrospinning of PLA nanofibers. The preparative electrospun PLA/ZIFNS meta-membranes exhibited an unusual combination of significantly reduced nanofiber diameter (∼462 nm), enhanced surface potential (approaching 10 kV), and increased surface activity and facilitated the formation of electroactive phases. With well-controlled morphological features, the highly electroactive PLA/ZIFNS meta-membranes exhibited exceptional filtration efficiencies for PM2.5 and PM0.3 (99.2 and 96.0%, respectively) even at the highest airflow rate of 85 L/min, in clear contrast to that of its pure PLA counterpart (only 79.3 and 74.6%). Arising from the increased electroactivity and active contact sites, remarkable triboelectric performance and self-charging mechanisms were demonstrated for the PLA/ZIFNS meta-membranes, contributing to long-term efficient PM0.3 filtration (97.5% for over 360 min). Moreover, as triggered by physiological activities like respiration and speaking, the electroactive PLA/ZIFNS meta-membranes enabled real-time monitoring with high sensitivity and specificity. The proposed strategy affords significant promotion of electroactivity and triboelectric performance for PLA nanofibers, which may motivate the development of ecofriendly protective membranes for respiratory healthcare and real-time monitoring.
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Small
·
2024
·
IF 13
Ting Chen,Caiyan Lai,He Zhao,Jie Yang,Kai Huang,Xu-Jia Hong,Yuepeng Cai,Renfeng Dong
Green and efficient total antioxidant capacity (TAC) detection is significant for healthy diet and disease prevention. This work first proposed the concept of TAC colorimetric detection based on microrobots. A novel metal-organic framework (MOF)-based biomimetic enzyme microrobot (MIL-88A@Fe 3 O 4 ) is developed that can efficiently and accurately detect the TAC of real fruits and vegetables. Unlike the previous colorimetric detection method to measure TAC which often requires the addition of toxic hydrogen peroxide (H 2 O 2 ) or light, the microrobots strategy can realize efficient TAC detection without any additional chemicals or stimuli. This is attributed to the oxidase-like activity from MIL-88A, which is discovered and confirmed for the first time by experiments and theoretical calculations. In addition, the microrobots can significantly accelerate the color reaction, resulting in a significant improvement in the detection efficiency of TAC in the motion state owing to their self-stirring effect. More importantly, the results of the MOF-based biomimetic enzyme microrobots strategy for detecting TAC in real fruits and vegetables are comparable to those tested by commonly used quantitative detection kits, in addition to low cost, excellent stability, and anti-interference ability. This attractive MOF-based biomimetic enzyme microrobot holds great prospects for future applications in catalytic sensing and promoting a healthy diet.
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MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Xu Liu,Peide An,Yide Han,Hao Meng,Xia Zhang
Cu-based nanozyme shows good oxidase-like activities due to the changeable states of Cu(II) and Cu(I), which are proven to be effective in the electron transfer in the redox process. Herein, the self-made MOF-818 with more Cu(II) loading was synthesized through a modified two-steps hydrothermal routes, which was then used as a sacrificial precursor to construct copper/zirconium composite oxides nanozymes (CN-MOF-818). The pyrolysis temperature was varied to obtain the best enzyme-like activities of the resulting CN-MOF-818. The laccase-like and catecholase-like activities were evaluated by using the oxidation of the mixture of 4-aminoantipyrine (4-AAP) and 2,4-dichlorophenol (2,4-DP), and 3,5-Di- tert -butylcatechol (3,5-DTBC) respectively. The enzyme-like activities were optimized through altering the catalytic conditions, and the corresponding enzyme catalytic kinetics including K m and V max were also determined. The enzyme-like mechanism of the CN-MOF-818 were also discussed based on EPR technique and the in-situ FT-IR analyses. In comparison with the pristine MOF-818 and the other reported Cu-based mimics, the as-prepared CN-MOF-818 exhibits the higher oxidase mimetic activities. These CN-MOF-818 can also be employed to detect the epinephrine with a low detection limit of 1.63 μM.
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COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Guibin Zhang,Lijun Wei,Yueyue Liang,Furu Zhang,Xineng Zhu,Yingge Xu,Fulong Yang,Shenmao Dong,Rui Zhang,Yongqian Shen
With the increase of power density in electronic devices, the electromagnetic (EM) compatibility and heat dissipation problems of electronic devices are becoming increasingly serious. Herein, MOF-derived FeCoNi@carbon (MOF-FeCoNi@C) composites were obtained by a simple one-step carbon thermal reduction of FeCoNi-MOF/polyacrylonitrile (PAN), and then combined with Al 2 O 3 to construct the thermally conductive and microwave absorbing silicone rubber sheets with dual functional characteristics (MOF-FeCoNi@C/Al 2 O 3 /SR). The MOF-confined strategy could achieve controllable growth and uniform distribution of FeCoNi alloy nanoparticles, optimize impedance matching, enhance the EM synergy and EMWs attenuation. Therefore, when the amount of MOF-FeCoNi@C added was 15 wt%, the minimum reflection loss ( RL min ) was -35.4 dB at 13.6 GHz with a thickness of 1.5 mm and an effective bandwidth (EBW) reached 4.1 GHz. Furthermore, the sample exhibits excellent thermal conductivity under the combined action of MOF-FeCoNi@C and Al 2 O 3 . As a consequence, this work utilizes a simple preparation process to develop a new type of absorber and promote its application in rubber sheets, provides a new idea for the research of microwave absorbing materials and has important practical significance.
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EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2024
·
IF 2.2
Peng Wang,Jun-Fei Gu,Zhan Chen,Hao-Yue Ma,Xing-Chuan Li,Shuai Li,Xiang-Ya Xu,Ye Yuan,Cheng Chen,Zongkui Kou
Graphical This study develops a solid-state thermal (SST) synthesis method for the one-step preparation of MOF-derived Mn x @NC catalysts. Among these, the optimal catalyst (Mn 2.5 @NC) exhibits excellent activity, remarkable stability, and good recyclability for HMF oxidation to FDCA, achieving an FDCA yield of 94 % within 4 h at room temperature and maintaining its catalytic performance for five cycles without activity decay. Transforming the bio-based 5-hydroxymethylfurfural (HMF) into its oxidation product 2,5-furandicarboxylic acid (FDCA) offers an attractive route for synthesizing bioplastic monomers. However, significant challenges remain in developing efficient and stable non-precious metal catalysts. Here, we employed a solid-state thermal synthesis (SST) method to design and synthesize a series of metal-organic framework (MOF)-derived metal-nitrogen-carbon (M@NC) materials with gradient metal contents and low metal loadings, labeled as Mn x @NC, for converting HMF into FDCA through oxidation. Further investigations revealed that the amount of metal doping significantly influenced the catalyst structure, particularly in terms of defect quantity and specific surface area. The optimal catalyst, Mn 2.5 @NC, exhibited the largest specific surface area and the highest number of defects, achieving a 94 % FDCA yield within 4 h. Experimental results demonstrated that the recovered catalyst could be reintroduced into the reaction system and maintained selectivity comparable to that of the fresh catalyst for at least five cycles. Moreover, various characterizations of both fresh and recovered catalysts confirmed the great stability of Mn 2.5 @NC. This study provides advanced insights into the effective catalytic conversion of HMF to FDCA and highlights the importance of structural design and regulation in optimizing M@NC catalysts.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Kaige Dong,Yuhang Cheng,Mengmeng Jia,Sakil Mahmud,Manyu Deng,Zhuoran Yi,Weiting Wang,Yimeng Feng,Dahao Lian,Gaosheng Zhang,Zhu Xiong
As (V) poses significant environmental and health risks due to its toxicity, making efficient wastewater treatment technologies essential. In this study, we introduce a novel composite material: MOF-like zirconium (Zr)-doped Prussian blue (PB) analogs decorated on polytetrafluoroethylene microporous membranes (Zr-PBAs x -PDA/PEI-M) for As (V) adsorption. Comprehensive characterization techniques, confirmed the successful incorporation of Zr into PB crystals and its growth on the membrane surface through PDA/PEI interlayers. We systematically explored the effects of varying Fe-Zr modification ratios, finding that Zr-PBAs 3 -PDA/PEI-M (Fe: Zr = 2:3) exhibited the optimal performance for As (V) removal and adsorption capacity, with a more intact and densely distributed crystal structure. It demonstrated that Zr-O bonding plays a crucial role in the adsorption mechanism, forming a double-dentate mononuclear structure with As (V). Moreover, the Zr-PBAs 3 -PDA/PEI-M’s adsorption capacity of As (V) was comprehensively assessed by key factors such as temperature, pH, operating pressure, natural organic matter (NOM), and initial As (V) concentration during wastewater treatment, which exhibited the excellent resistance to interference in removing As (V). Remarkably, Zr-PBAs 3 -PDA/PEI-M retained its high adsorption capacity across three cycles of reuse, highlighting its excellent stability and reusability. When tested on simulated Pearl River water samples containing As (V), the material achieved filtrate concentrations well below 0.5 mg/L, in compliance with China’s Comprehensive Wastewater Discharge Standard. This study presents a promising solution for efficient As (V) removal in wastewater, offering practical insights into its potential application for real-world water treatment challenges.
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Nanomaterials
·
2024
·Vol. 14
·期 7
·573
·
IF 4.4
Zhou Wang,Yijie Lian,Xinde Zhu,Qi Wang
The application of transition metal hydroxides has long been plagued by its poor conductivity and stability as well as severe aggregation tendency. In this paper, a novel hierarchical core–shell architecture, using an F-doped Co(OH)2nanorod array (Co(OH)F) as the core and Mn/Ni co-doped Co(OH)2nanosheets (NiCoMn-LDH) as the shell, was constructed via an MOF-mediated in situ generation method. The obtained Co(OH)F@ NiCoMn-LDH composites exhibited excellent supercapacitive performance with large specific capacitance as well as improved rate capability and long-term stability. The effect of the Ni/Mn ratio on the supercapacitive performance and energy storage kinetics was systematically investigated and the related mechanism was revealed.
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CATALYSIS TODAY
·
2024
·
IF 5.2
Guiming Xie,Xingyang Bai,Fei Yu,Qingyuan Yang,Zhou-jun Wang
Three AuCu/ZnO bimetallic catalysts , AuCu/ZnO-BTC, AuCu/ZnO-BDC and AuCu/ZnO-MOF-74, were derived from various MOF precursors using facile hydrothermal methods . Among the resultant catalysts, the AuCu/ZnO-BTC catalyst possessed the best methanol synthesis activity, whose space time yield of methanol ( STY MeOH ) reached 359.0 g MeOH kg cat −1 h −1 at 250 °C under 3 MPa. Structural characterization reveals that in comparison with the AuCu/ZnO-BDC and AuCu/ZnO-MOF-74 catalysts, the AuCu/ZnO-BTC catalyst possessed higher specific surface area ( S BET ), tinier metal particle size, more oxygen vacancies , stronger metal-support interactions and larger amount of medium basic sites. In situ DRIFTS result demonstrates that formate (*HCOO) species were readily generated and bridged-methoxy (*b-OCH 3 ) species were selectively formed on the AuCu/ZnO-BTC catalyst, which may be related with its abundant oxygen vacancies and responsible for its superior methanol synthesis activity. The present work derives high-performance AuCu/ZnO bimetallic catalysts from MOF precursors and provides new insight into structure-activity relationships for CO 2 hydrogenation to methanol.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2018
·
IF 3.927
Shumin Wang,Qingping Guo,Shujun Liang,Peng Li,Jujie Luo
A series of mixed matrix membranes (MMMs) were fabricated with Ni-MOF-74 as filler and poly (styrene-b-butadiene-b-styrene) (SBS) polymer as matrix materials for CH 4 /N 2 separation. MMMs were characterized by Fourier transform infrared (FTIR) spectra, X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). Gas separation behavior was investigated by measuring single and mixed gases. For the single gas, the CH 4 permeability of the MMMs incorporated with 15 wt% Ni-MOF-74 (Ni-MOF-74/SBS-15) reached 83.5 Barrer, which was 116% higher than that of SBS (38.6 Barrer), while its ideal selectivity remained the same. CH 4 permeability can further increase to 176.6 Barrer with the increase in temperature to 55 °C. For the CH 4 /N 2 (50/50 vol%) mixed gas, the Ni-MOF-74/SBS-15 sample exhibited increasing CH 4 permeability (74.7 vs 36.7 Barrer), while selectivity remained unchanged relative to that of the pure SBS membrane.
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