APPLIED SURFACE SCIENCE
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2019
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IF 5.155
Yanzhong Wang,Sha Li,You Chen,Xiaofeng Shi,Chao Wang,Li Guo
Developing efficient Pt-free electrochemical catalysts for hydrogen evolution reaction (HER) is crucial for an energy source with low pollutant emissions. Herein, zeolitic imidazolate framework-67 (ZIF-67) polyhedrons are first in situ grown on the fibrils of commercial melamine foam at room temperature, and then phosphided and carbonized to obtain the free-standing 3D hierarchical CoP@N-doped carbon composite foam (CoP@NC/CF) with interconnected architecture. The 3D interconnected carbon networks provide efficient and fast channels for the rapid transfer of ions and electrons, and inhibit the agglomeration of CoP nanoparticles . The unique structure of CoP@NC/CF thus allows for delivering the remarkable HER performance with a low overpotential of 151.3 mV at 10 mA cm −2 , small Tafel slope of 64.8 mV dec −1 , and excellent long-term stability. This research provides a new strategy for the rational design and facile synthesis of the free-standing 3D CoP-based catalysts for high-performance HER.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Man Wang,Shichao Chen,Kang Wang,Song Song,Xitao Wang
A Ru-doped CoFe MOF-derived Co 3 O 4 -Fe 2 O 3 heterostructure was fabricated via mild pyrolysis. • The low-temperature strategy preserves the 2D MOF nanosheet scaffold. • Ru incorporation modulates Co/Fe electronic states and suppresses structural aggregation during mild pyrolysis. • Ru 0.024 CoFe MOF-250 requires only 227 mV at 20 mA cm −2 with a Tafel slope of 33.67 mV dec −1 . • Excellent durability is demonstrated by only 8.3 mV potential increase after 100 h at 20 mA cm −2 . Metal-organic frameworks (MOFs) are promising for the oxygen evolution reaction (OER), yet they suffer from framework collapse and active-site aggregation during high-temperature pyrolysis. Herein, a Ru-doped CoFe MOF is grown in situ on nickel foam (NF) and subsequently annealed at 250 °C, forming a Co 3 O 4 -Fe 2 O 3 @Ru 0.024 CoFe MOF heterostructure. The incorporation of Ru modulates the local electronic structure of the Co/Fe centers, while mild annealing at 250 °C generates Co 3 O 4 -Fe 2 O 3 nanophases within the partially preserved MOF nanosheet scaffold. This creates intimate heterointerfaces that facilitate rapid charge transfer. In 1.0 M KOH, the optimized electrode delivers a current density of 20 mA cm -2 at an overpotential of only 227 mV, exhibits a low Tafel slope of 33.67 mV dec −1 , and achieves an electrochemical surface area (ECSA) of 133.5 cm 2 . After 100 h of operation at 20 mA cm −2 , the potential increases by merely 8.3 mV. This work presents an effective strategy that combines Ru doping with mild pyrolysis to construct efficient and stable MOF-based OER electrocatalysts.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Liqin Tang,Yuying Yan,Xiao Yang,Fengkai Zhou,Zhixi Yu,Jun Wang,Fujun Wang,Lu Wang,Jifu Mao,Yan Li
A Medi-MOF suture implemented a “drainage–response–release” therapeutic strategy. • Bioinspired urushiol interfacial bridging enabled anchoring of Medi-MOF on suture. • The suture realized pH-responsive release of curcumin and Zn 2+ in diabetic wounds. • The suture showed potent antibacterial, immunomodulatory, and angiogenic activity. • The suture promoted tissue regeneration for diabetic wound healing. Surgical sutures are indispensable for wound closure, but they may promote bacterial colonization and exacerbate inflammation as they are often treated as passive materials. Impaired immune function and vascular dysfunction can severely hinder wound healing particularly in diabetic wounds. Herein, a bioinspired therapeutic silk suture system was constructed which integrated interfacial engineering with responsive drug delivery to address these limitations. A curcumin-based metal–organic framework (Medi-MOF) was immobilized onto silk sutures via an urushiol-mediated interfacial layer, forming a robust coating. Benefiting from the unique molecular structure and rapid curing properties of urushiol, MOF nanoparticles can be stably anchored through a variety of interactions, including hydrogen bonding, π–π stacking and metal coordination. The system exhibited pH-responsive release behavior in vitro , with accelerated Medi-MOF degradation and increased curcumin/Zn 2+ release under acidic conditions, while maintaining slower release under physiological conditions. Notably, immobilization onto the silk substrate further modulates release kinetics, resulting in a hierarchical mechanism that combines diffusion control with pH-responsive release. Moreover, the inherent capillary wicking property of braided silk sutures, traditionally regarded as a drawback, is transformed into a functional advantage by facilitating liquid transport and promoting contact between wound fluid and the Medi-MOF coating. This capillary wicking-assisted pH-responsive release strategy contributed to bacterial infection, modulated inflammation, and promoted tissue regeneration. Overall, this work provided a new paradigm for transforming sutures from passive closure devices into bioactive therapeutic platforms for diabetic wound management. Download: Download high-res image (178KB) Download: Download full-size image
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Advanced Science
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2023
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IF 15.1
Hualin Jiang,Zhe Zhao,Gang Li,Mengxue Wang,Pinghua Chen,Xiaotian Liu,Xinman Tu,Yitian Hu,Zhen Shen,Yirou Wu
The design of catalysts with tunable active sites in heterogeneous interface structures is crucial for addressing challenges in the water-splitting process. Herein, a hollow spherical heterostructure FeCo-P is successfully prepared by hydrothermal and phosphorization methods. This hollow structure, along with the heterogeneous interface between Co 2 P and FeP, not only facilitates the exposure of more active sites, but also increases the contact area between the catalyst and the electrolyte, as well as shortens the distance for mass/electron transfer. This enhancement promotes electron transfer to facilitate water decomposition. FeCo-P exhibits excellent hydrogen evolution (HER) and oxygen evolution (OER) performance when reaching @ 10 mA cm −2 in 1 mol L −1 KOH, with overpotentials of 131/240 mV for HER/OER. Furthermore, when FeCo-P is used as both the cathode and anode for overall water splitting (OWS), it only requires low voltages of 1.49, 1.55, and 1.57 V to achieve CDs of 10, 100, and 300 mA cm −2 , respectively. Density functional theory calculations indicate that constructing a Co 2 P and FeP heterogeneous interface with good lattice matching can facilitate electron redistribution, thereby enhancing the electrocatalytic performance of OWS. This work opens up new possibilities for the rational design of efficient water electrolysis catalysts derived from MOFs.
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JOURNAL OF HAZARDOUS MATERIALS
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2023
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IF 13.6
Bin Xiang,Jingling Gong,Yuqing Sun,Jian Li
The poor mechanical durability and weak fouling resistance of oil/water separation membranes severely restrict their applications in industry. Herein, a robust PVA/GO@MOF membrane with fast photothermal self-cleaning capability was developed through facile chemical crosslinking and suction-filtration strategies. Attributed to the powerful underwater superoleophobicity, the PVA/GO@MOF membrane exhibited extraordinary anti-oil adhesion even for high-viscosity crude oil and continuous crude oil emulsion purification capability with stable flux (1020 L m −2 h −1 bar −1 ) and exceptional efficiency (> 99.3%) even after 60 min. Most importantly, in comparison to reported photocatalytic self-cleaning oil/water separation membranes, the PVA/GO@MOF membrane can degrade organic contaminants more rapidly with a higher degradation rate (99.9%) in 50 min due to the superior photothermal conversion capacity. The synergistic photothermal and photocatalytic effects significantly enhanced photodegradation efficiency, which created opportunities for in-depth treatment of complex oily wastewater. Besides, the obtained membrane displayed excellent chemical and mechanical durability with underwater oil contact angle (UWOCA) above 150° even in harsh environments, such as corrosive solutions, UV irradiation, ultrasound treatment, abrasion experiment and bending test. Therefore, the developed PVA/GO@MOF membrane with robust durability and fast photocatalytic self-cleaning property is highly expected to purify oily wastewater and degrade organic pollutants .
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Zecheng Cheng,Lunjin Li,Tao Jia,Fengting Li
Efficient recovery of precious metals from secondary resources is of great economic and environmental significance in modern society. Herein, an efficient adsorbent ZIF-8-MTD was designed using 1,3,4-thiadiazole (MTD)-modified zinc-based metal-organic framework (MOF) for efficient recovery of gold (Au)(III) from wastewater. It was found that the ZIF-8-MTD adsorbent has excellent adsorption performance for Au(III), with a maximum adsorption capacity of 1604.53 mg·g −1 at room temperature (15 °C), which is superior to the traditional adsorbent. Particularly, the ZIF-8-MTD adsorbent still maintained a high saturation adsorption capacity of 1088.8 mg·g − 1 at a low Au(III) concentration (10 ppm). The fitting results of adsorption isotherm and kinetic adsorption model indicated that the adsorption process was consistent with Langmuir and pseudo-second-order adsorption models, implying that chemisorption was involved in the adsorption process. Moreover, the results of adsorption selectivity , desorption and adsorption experiments confirmed good adsorption selectivity and recyclability. Combining pH effect experiments, infrared spectroscopy (IR), and X-ray photoelectron spectroscopy (XPS) characterizations, we proposed an electrostatic adsorption mechanism in which the coordination interactions between the -SH functional groups in the framework and Au(III) lead them to be adsorbed to the ZIF − 8-MTD surface and partially reduce it to Au(I). More importantly, the outstanding adsorption performance, high selectivity and strong stability make it have great potential for practical application.
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NEW JOURNAL OF CHEMISTRY
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2023
·Vol. 47
·期 44
·20336-20343
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IF 3.3
Meihui Lu,Aichen Dong,Xinyang Li,Xuanqi Liu,Ziqing Zhang,Tao Tian,Liqiang Jing
Semiconductor photocatalysis is a potential solution to meet energy needs with green and inexhaustible solar energy. However, designing efficient and stable photocatalysts is a challenging task due to the limited ability to effectively separate electrons and holes. In this paper, by using a straightforward ethanol dispersion technique, we were able to combine ultrathin layered Cu-TCPP MOFs with g-C3N4 nanosheets, resulting in the creation of an extremely effective nano-composite photocatalyst with exceptional UV-vis activity. CT/CN heterojunctions displayed remarkable photocatalytic efficacy for the production of H2, with 3CT/CN showcasing a five-fold enhancement in photoactivity as compared to the unadorned g-C3N4. Based on the results of photoluminescence spectroscopy, electrochemical impedance spectroscopy, and electrochemical reduction, the considerably improved charge transfer and separation, together with the possible catalytic capability of uniformly distributed metal nodes in Cu-TCPP, are believed to be the underlying reason for the observed exceptional photoactivity. After thorough analysis, a potential process for charge transfer and segregation between g-C3N4 and Cu-TCPP has been suggested.
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DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 47
·17711-17716
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IF 4
Xudun Shen,Liping Huang,Shuaishuai Li,Longnian Tang,Qiumei Lei,Bowang Zhao,Huilian Hao,Wenyao Li,Min Zeng,Guanjie He
We used sodium hydroxide-mediated approach and tannic acid etching to prepare hollow structured trimetallic MOF-derived CoFeNi/Z-P NC nanocomposites. Remarkably, the resulting CoFeNi/Z-P NC nanocomposites have large specific surface area and mesoporous structure, making their active sites more accessible and mass transfer more effective. More complex trimetallic components provide greater possibilities for further improving electrocatalytic performance. The CoFeNi/Z-P NC nanocomposites demonstrate notable enhancements for the OER, and 10 mA cm−2 current density is achieved at a low overpotential of 244 mV, with a low Tafel slope of 66.2 mV dec−1 and have good stability in alkaline solutions. In addition, as a cathode material for overall alkaline water splitting, CoFeNi/Z-P NC is better than RuO2 with longer cycling stability.
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TALANTA
·
2023
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IF 6.1
Kai Zheng,Jiangfei Pan,Zipei Yu,Changqing Yi,Mei-Jin Li
We have proposed a signal dual-amplification electrochemiluminescence (ECL) strategy based on tris(2,2′-bipyridyl)ruthenium(II) (Ru(bpy) 3 2+ ) as chromophores confined with three-dimensional (3D) zinc oxalate metal−organic frameworks (Ru(bpy) 3 2+ @MOFs) for the detection of miRNA-21. The three-dimensional chromophore connectivity in zinc oxalate MOFs provided a network among Ru(bpy) 3 2+ units, shielding the chromophores from solvent molecules and resulting in high Ru(II) complex emission efficiency. Additionally, we discovered that magnetic beads (MBs) used as carrier for enriched signals contribute to enhanced ECL intensity of the chromophore. To evaluate its clinical application, we applied this method to determine the concentration of miRNA-21 solutions ranging from 1.56 to 100 nM, obtaining a calibration curve of ECL intensity versus logarithm of concentration (logC) of miRNA-21 with a high correlation coefficient. This work demonstrates the construction of a signal amplification strategy ECL biosensor for miRNA using Ru(bpy) 3 2+ @MOF systems and its application in ECL detection for analyte methodology.
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-9
·
IF 16.6
Wang Sa,Fu Yu,Wang Ting,Liu Wansheng,Wang Jian,Zhao Peng,Ma Heping,Chen Yao,Cheng Peng,Zhang Zhenjie
The development of fast-response sensors for detecting NH 3 at room temperature remains a formidable challenge. Here, to address this challenge, two highly robust Hoffmann-type metal-organic frameworks are rationally applied as the NH 3 sensing materials which possess ultra-high static adsorption capacity for NH 3 , only lower than the current benchmark material. The adsorption mechanism is in-depth unveiled by dynamic adsorption and simulation studies. The assembled interdigital electrode device exhibits low detection limit (25 ppb) and short response time (5 s) at room temperature, which set a record among all electrical signal sensors. Moreover, the sensor exhibits excellent selectivity towards NH 3 in the presence of 13 other potential interfering gases. Prominently, the sensor can stably output signals for more than two months at room temperature and can be recovered by simply purging nitrogen at room temperature without heating. This study opens up a way for reasonably designing gas sensing materials for toxic gases.
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SENSORS AND ACTUATORS B-CHEMICAL
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2023
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IF 8.4
Rong Guo,Yongsheng Deng,Yinghao Jia,Caixin Shi,Wenpu Zhang,Ying Zhou,Xinghui Hou
In order to monitor the quality of the surrounding environment and realize the non-invasive screening of diabetes, it is necessary to develop a simple and sensitive acetone sensor. In this paper, GC x porous structures doped with different proportions of Ga element are prepared through calcining Co-MOF synthesized by solvothermal method . The findings indicate that the addition of Ga inhibits the further growth of grain and improves the uniformity of the adhered nanoparticles in GC x . Performance test shows that the GC4 sensor exhibit extremely ultra-high response (197.6, 50 ppm) acetone at 160 °C and relatively low detection limit of 0.1 ppm (2.3). The main reason for the significant improvement of GC x acetone sensitivity is that the introduction of Ga regulates the oxygen vacancy which provide rich reaction activation sites for the further reaction and diffusion of acetone and amplify resistance change by modulating the carrier concentration. A practical method for controlling oxygen vacancy and carrier concentration of sensing materials is shown in this work, which creates a new opportunity for the development of high-performance acetone sensors.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Mengxue Chen,Khalid Umer,Bonan Li,Zhexu Li,Kongming Li,Wanjun Sun,Yong Ding
The growing concern over the rapid consumption of fossil fuels has spurred scientists to seek environment-friendly and sustainable energy alternatives. The utilization of photocatalytic water splitting shows great potential in generating environmentally friendly hydrogen energy. Zirconium-based porphyrin MOF-545 has drawn extensive attention in photocatalysis since it has strong light absorption and fast electron transfer capability. A series of Zr-based metalloporphyrins containing different metals, MOF-545M (M = Co, Ni, Cu, Zn), were synthesized and assembled with solid solution Zn x Cd 1-x S (ZCS) nanoparticle to develop the corresponding of hybrid photocatalysts , ZCS/MOF-545M. Various characterizations show that introducing the porphyrin MOF-545Co not only improve the visible light response range of Zn 0.5 Cd 0.5 S (ZCS-0.5) but also enhance the carrier separation efficiency of ZCS-0.5. The carrier transfer direction during the reaction was confirmed by surface photovoltage spectroscopy and shows the formation of S-scheme. Under visible light irradiation , the hybrid photocatalyst ZCS-0.5/MOF-545Co exhibits a high H 2 evolution rate of 148 μmol h −1 , with increases of 52.8, 22.9 and 6.5 times than those of bare ZnS, CdS and ZCS-0.5, respectively. The present work gives a strategy for erecting S-scheme heterojunction to inhibit the photocorrosion of metal sulfides and enhancement the carrier separation efficiency.
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