Journal of Materials Chemistry A
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2025
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IF 9.5
Zihui Yu,Yan Wang,Yaoming Zhang,Qihua Wang,Tianqiang Yin,Zhancheng Zhang,Gai Zhao,Meizhe Yu,Xianqiang Pei
Due to their unique organic–inorganic hybrid structures, metal–organic frameworks (MOFs) have shown increasing potential as fillers for polymer self-lubricating composites. In this study, a systematic investigation of three structurally different MOFs (ZIF-8, MOF-5, and UiO-66, each at 3 wt%) in polyimide (PI) composite coatings revealed that their incorporation enhanced the mechanical properties. Notably, UiO-66 exhibited the most pronounced reinforcement, attributable to its strong interfacial bonding with the resin matrix, which led to an 18.4% increase in tensile strength as well as corresponding enhancements in elastic modulus and hardness. To gain insight into the friction and wear mechanisms of MOFs/PI composite coatings, ball-on-disc tests were complemented by molecular dynamics (MD) simulations and density functional theory (DFT) calculations. This combined approach elucidated the role of MOFs at the frictional contact interface and their influence on transfer film formation. The conclusions regarding the intrinsic relationship between the structure of MOFs and their tribological mechanisms are of both theoretical and practical importance for developing PI composite coatings for self-lubricating bushings, bearing shells and sliders.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
·
IF 8.3
Senmiao Zhao,Tianxin Wu,Ke Wang,Qiyue Wang,Xiaodan Mei,Jinglan Huang,Haizhen Liu,Cunke Huang,Jin Guo
In this study, a Ni–C co-dispersed catalyst (denoted as Ni&C) with a uniform spherical morphology (≈2 μm diameter) and Core-shell structure was synthesized using Ni-based metal-organic framework (MOFs) as precursors. The Core-shell Ni&C catalyst significantly improved the dehydrogenation kinetics of MgH 2 . The MgH 2 –Ni&C composite exhibited a remarkably low onset dehydrogenation temperature of 192.6 °C, which is 136.9 °C lower than that of pure MgH 2 . The peak dehydrogenation temperature and dehydrogenation temperature span were reduced by 120 °C and 31.3 °C, respectively. At 300 °C, the composite released 5.82 wt% H 2 within 2.1 min. The apparent activation energy for dehydrogenation decreased to 76.78 kJ mol −1 , far below that of pure MgH 2 (138.18 kJ mol −1 ). Mechanistic analysis revealed that Mg 2 NiH 4 /Mg 2 Ni phases formed in-situ during hydrogen cycling acted as "hydrogen pumps" and nucleation promoters of matrix, while the carbon provided good spatial confinement and enhanced thermal conductivity . Moderate coupling between Ni and C generated synergistic effects , collectively optimizing the dehydrogenation performance.
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CATALYSIS TODAY
·
2020
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IF 5.825
Yulong Gu,Wei Xu,Yinyong Sun
The development of active oxidative desulfurization (ODS) catalysts is of practical importance. Recently, MOF-808(Zr) has been attempted to use as ODS catalyst due to its various advantages. However, generally MOF-808(Zr) prepared by conventional method was less active in the oxidation reactions due to the lack of defect sites in the structure. In this contribution, we report that the catalytic oxidative performance of MOF-808(Zr) can be enhanced by acid treatment due to the formation of defect sites resulting from the partial removal of organic linkers in the structure. During the experiment, the effect of acid concentration, treatment time, the addition amount of oxidant and reaction parameters on the performance of MOF-808(Zr) was studied. The catalytic results show that MOF-808(Zr) treated with 0.4 M HCl for 1h can catalyze the oxidation of dibenzothiophene completely at 60°C in 15 min. The activity (mole number of converted DBT per hour per unit mass) is 70 mmol h −1 g −1 , which is much higher than that (45 mmol h −1 g −1 ) of parent MOF-808(Zr). In addition, the catalyst can be reused several times without obvious loss of catalytic performance.
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SCIENCE OF THE TOTAL ENVIRONMENT
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2021
·
IF 7.963
Shiyin Zhao,Yangke Long,Xuehua Shen,Shubin Wang,Yiping Su,Xuanjun Zhang,Zuotai Zhang
Peroxymonosulfate (PMS)-based Fenton-like reactions are widely used for wastewater remediation. Metal-free carbonaceous activators can avoid the secondary pollution caused by metal leaching but often suffer from insufficient activity due to limited active centers and mass transfer barriers. Here, we prepared a series of heteroatom (N, S, F)-doped, highly porous carbonaceous materials (UC- X , X = N, S, F) by pyrolyzing UiO-66 precursors assembled by various organic ligands. Density functional theory calculations showed that the heteroatoms modulated the electronic structures of the carbon plane. UC- X exhibited significantly enhanced PMS activation capability compared with the undoped counterpart, in the efficiency order of UC-N > UC-S > UC-F > UC. UC-N (calcined at 1000°C) showed the best PMS activation, exceeding that of commonly used carbocatalysts. The prominent performance of UC-N originated from its unique porous structure and homogeneously dispersed graphitic N moieties. Trapping experiments and electron spin resonance showed a nonradical degradation pathway in the UC-N/PMS system, through which organics were oxidized by donating electrons to UC-N/PMS* metastable complexes. This work not only reports a universal way to access high-performance, metal-free PMS activators but also provides insight into the underlying mechanism of the carbon-activated PMS process.
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PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2018
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IF 6.578
Ke Chen,Kai Xu,Long Xiang,Xiao Dong,Yue Han,Chongqing Wang,Lin-Bing Sun,Yichang Pan
Mixed matrix membranes (MMMs) derived from metal-organic frameworks (MOFs) nanocrystals represent a promising alternative for overcoming the trade-off between permeability and selectivity derived from the pristine polymeric membrane . The selection of MOFs fillers are mainly focused on their diffusion-selectivity property for gas-pairs. However, the improvement of both gas-permeability and selectivity through addition of sorption-selective MOFs are rarely reported. Herein, the incorporation of CO 2 -philic KAUST-7 (also referred to as NbOFFIVE-1-Ni) nanocrystals makes the neat 6FDA-Durene polyimide membrane more permeable and more selective, surpassing the state-of-the-art 2008 Robeson upper bound for CO 2 /CH 4 . Nano-sized (~ 80 nm) KAUST-7 crystals with sharp particle size distribution were first fabricated through a co-solvent synthesis method. The explored gas transportation mechanism indicates that the improvement of CO 2 /CH 4 selectivity on MMMs are attributed to the significant raise of the sorption-selectivity rather than the diffusion-selectivity. The favorable interfacial interaction between the imide groups of the 6FDA and the H of the pyrazine in the KAUST-7 enhances plasticization resistance of the neat polymer membrane. The developed MMMs exhibit a promising application in CO 2 capture from natural- and bio-gas.
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Journal of Materials Chemistry A
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2016
·Vol. 4
·期 14
·5159-5166
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IF 8.262
Lijin Huang,Man He,Beibei Chen,Bin Hu
A facile preparation of magnetic MOF composites with flexible mercapto group pendants in their pores is realized through solvent-assisted ligand exchange (SALE) under mild conditions in water, and terephthalate in UIO-66 is replaced with mercaptoacetic acid (MAA). After the SALE processing, the crystallinity, porosity, and superparamagnetism of the mercapto functionalized magnetic Zr-MOF (MFC-S) are well maintained, and the obtained MFC-S exhibits a higher adsorption capacity (282 mg g−1) for Hg2+ than that of the magnetic Zr-MOF (MFC-O). Furthermore, the prepared MFC-S can be regenerated easily by liquid desorption after adsorption of metal ions and be reused more than 5 times without obvious decrease in removal performance. The proposed SALE method for the preparation of mercapto functionalized magnetic MOF composites (MFCs) is easy-to-operate and low cost, providing not only a reliable porous MFC platform for the removal of metal ions, but also a simple and efficient synthesis route for the preparation of functionalized MFCs which cannot be achieved through conventional approaches.
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JOURNAL OF APPLIED ELECTROCHEMISTRY
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2019
·Vol. 49
·期 6
·563-574
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IF 2.366
Zheng Sining,Wu Dan,Huang Limei,Zhang Mengxin,Ma Xiuling,Zhang Zhangjing,Xiang Shengchang
Abstract It is needed to speed up the development of a sensitive detection platform for simultaneous determination of dihydroxybenzene isomers with harmful properties. Here, two isomorphic Metal–organic frameworks (MOFs) [Zn(Trz)(R-BDC) 1/2 ] (FJU-40-R, R = H or NH 2 ; Trz = 1,2,4-Triazole; H-BDC = terephthalic acid) were selected to derive two N-doping porous carbon (NPC) materials. Further, a strategy for constructing electrochemical sensors for simultaneous determination of hydroquinone (HQ) and catechol (CT) was proposed by the MOF-derived NPC modifying glass carbon electrode (GCE). It was found that HQ and CT had good responses on NPC-FJU-40-H/GCE, but had no obvious responses on NPC-FJU-40-NH 2 /GCE. NPC-FJU-40-H/GCE displayed excellent reproducibility, stability, and anti-interference. Under the optimal conditions, the linear ranges of HQ and CT on NPC-FJU-40-H/GCE were 1 ~ 70 µmol L −1 and 1 ~ 100 µmol L −1 with the detection limits of 0.18 µmol L −1 for HQ and 0.31 µmol L −1 for CT, respectively. Although the porous carbon (PC) derived from MOFs has been applied in electrochemical sensing, the effect of the ligand functional groups of isomorphic MOFs on the electrochemical properties of the derived PC materials is still lack of relevant research. Our research provided an idea that the electrocatalysis properties of MOF-derived porous carbon materials could be tuned by changing the functional groups in ligands of isomorphic MOFs in electrochemical sensing field. Graphical abstract A feasible strategy was proposed by changing the ligands of the two isomorphic MOFs (FJU-40-H and FJU-40-NH 2 ) to tune the electrocatalysis properties of MOF-derived N-doped porous carbon materials for the simultaneous determination of dihydroxybenzene isomer.
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Nanoscale
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2019
·Vol. 11
·期 14
·6970-6981
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IF 6.97
Jian-Ping Song,Liang Wu,Wen-Da Dong,Chao-Fan Li,Li-Hua Chen,Xin Dai,Chao Li,Hao Chen,Wei Zou,Wen-Bei Yu,Zhi-Yi Hu,Jing Liu,Hong-En Wang,Yu Li,Bao-Lian Su
The lithium–selenium (Li–Se) battery has attracted growing interest recently due to its high energy density and theoretical capacity. However, the shuttle effect and volume change during cycling severely hinder its further application. In this work, we report a metal–organic framework (MOF)-derived nitrogen-doped core–shell hierarchical porous carbon (N-CSHPC) with interconnected meso/micropores to effectively confine Se for high-performance Li–Se batteries. The micropores were located at the ZIF-8-derived core and the ZIF-67-derived shell, while mesopores appeared at the core–shell interface after the pyrolysis of the core–shell ZIF-8@ZIF-67 precursor. Such a special hierarchical porous structure effectively confined selenium and polyselenides to prevent their dissolution from the pores and also alleviated the volume change. In particular, in situ nitrogen doping, which afforded N-CSHPC, not only improved the electrical conductivity of Se but also provided strong chemical adsorption on Li2Se, as confirmed by density functional theory calculations. On the basis of dual-physical confinement and strong chemisorption, Se/N-CSHPC-II (molar ratio of Co source to Zn source of 1.0 in the core–shell ZIF-8@ZIF-67 precursor) exhibited reversible capacities of up to 555 mA h g−1 after 150 cycles at 0.2 C and 462 mA h g−1 after 200 cycles at 0.5 C and even a discharge capacity of 432 mA h g−1 after 200 cycles at 1 C. Our demonstration here suggests that the carefully designed Se/C composite can improve the reversible capacity and cycling stability of Se cathodes for Li–Se batteries.
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JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2025
·
IF 2.4
Yan Zhao,Qianwen Zheng,Jiahao Wang,Lekang Cui,Helin Pan,Yayun Zhang
BACKGROUND The design of catalysts, particularly those with industrially practical dimensions, is critical for advancing wastewater treatment. RESULTS We report a scalable strategy that integrates MOF-derived Co active sites into millimeter-sized hollow carbon spheres (HCS) prepared via phase separation of polyacrylonitrile. The resulting Co@HCS combines hierarchical porosity and graphitized shells with confined Co nanoparticles and Co–N–C sites, enabling efficient peroxymonosulfate (PMS) activation. Compared with HCS and Co@ZIF, Co@HCS achieved >80% p -chlorophenol (4-CP; 50 mg L −1 ) removal within 10 min, with activity enhanced by increased Co loading and optimal PMS dosage (0.50 g L −1 ). The catalyst exhibited broad pH adaptability (50.1–90.2% removal at pH 3–9), strong temperature responsiveness and low apparent activation energy (16.3 kJ mol −1 ). Radical quenching and electron paramagnetic resonance confirmed SO 4 •− as the dominant species, while X-ray photoelectron spectroscopy revealed dynamic Co 0 /Co 2+ /Co 3+ cycling sustaining PMS activation. Notably, the millimeter-sized morphology of Co@HCS enabled stable >70% 4-CP removal over 48 h in continuous flow (addressing nanocatalyst drawbacks). CONCLUSION Co@HCS is an efficient, durable and recyclable catalyst. This catalyst combines nanoscale catalytic precision with macroscopic practicality, facilitating the practical application of persulfate-driven advanced oxidation processes and providing a durable and recyclable solution for such processes in continuous-flow water treatment. © 2025 Society of Chemical Industry (SCI).
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Yu Ma,Dongyu You,Yu Fang,Jian Luo,Qinhe Pan,Yunling Liu,Fei Wang,Weiting Yang
The removal of lead ions from water is a global concern due to the great damage to human health when they enter the human body through drinking water. Herein, metal-organic framework/chitosan composite beads for the adsorption of Pb(II) were prepared by the secondary growth method, which allowed the domain-limited growth of TIF-A1 (a tetrahedral imidazolate framework) in the porous matrix of chitosan. This material can remove trace Pb(II) from aqueous solution (100 ppb) with an efficiency of 99.95%, and the remaining Pb(II) content meets the international drinking water standards. Moreover, it exhibited good recoverability for at least five adsorption/desorption cycles. The adsorption mechanism can be ascribed to that Pb(II) ions chelate with the hydroxyl, carboxyl and amino groups in the adsorbent. This work offers a good adsorbent for the removal of trace Pb(II), which has potential applications in reclaimed water treatment.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
·
IF 8.128
Qingqing Jiang,Lin Wang,Yan Wang,Meihua Qin,Rui Wu,Zhengxi Huang,Hai-Jian Yang,Yongxiu Li,Tengfei Zhou,Juncheng Hu
For potassium-ion battery (PIB), it remains a huge challenge to develop an appropriate anode material to compensate the large radius of K + . MoSe 2 shows great potential for efficient K + insertion/extraction due to its unique lamellar structures with an interlayer spacing of 6.46 Å. However, pure MoSe 2 has low electronic conductivity and agglomerates during long-term cycling. In the present work, MoSe 2 nanosheets were fabricated on the N -doped porous carbon polyhedron (NPCP). The obtained product was designated as NPCP@MoSe 2 and functioned as anode materials for PIBs. NPCP@MoSe 2 displayed a promising reversible capacity (325 mAh/g at 100 mA/g after 80 cycles), long-term cycling performance (128 mAh/g at 500 mA/g after 800 cycles), and superior rate property at 5000 mA/g. The enhanced electrochemical performance of NPCP@MoSe 2 could be attributed to the rational design of hybrid structures. Notably, the hollow NPCP provide a large contact area for the interactions among the electrolytes and electro-active materials as well as partly buffer the volume expansion. The synergistic effects between MoSe 2 and NPCP could mitigate the agglomeration of MoSe 2 nanosheets. Besides, the uniformly doping N elements enhanced the conductivity of the carbon matrix, and the N -group also provided potential binding active sites for K-ion accommodation. This work paves the ideas for the design of novel anode materials with high specific capacity, good cycling stability and outstanding rate capability for PIBs.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
·
IF 4.539
X. Li,J. Li,Y. Zhang,P. Zhao
Ni-MOF derived NiO nanosheets growing on rGO have been successfully synthesized by a hydrothermal method following by a series of calcination procedures (300 °C, 400 °C, and 450 °C). The influence of the introduction of rGO and the calcination temperature on electrochemical performance of Ni - MOF derived NiO nanosheets as the electrode material were highlighted in detail. For the three-electrode test system, Ni-MOF derived NiO/rGO composites subjected to calcination at 300 °C demonstrated the highest specific capacitance (435.25 F·g −1 at 1 A·g −1 ), and maintained 68.00% of its initial value at 8 A·g −1 . Its specific capacitance was increased by 49.34% when compared with the initial value after 25,000 cycles at 50 mV·s −1 . With the increase in calcination temperature, the specific capacitance presented the downward tendency (400 °C: 171.50 F·g −1 at 1 A·g −1 , 450 °C: 116.00 F·g −1 at 1 A·g −1 ) due to the reduction in specific surface area originating from the agglomeration of NiO nanosheets. The introduction of rGO greatly enhanced the electrochemical performance of the composites treated at 300 °C (increased by 40.40% at 1 A·g −1 and 47.30% in specific capacitance at 8 A·g −1 ). The assembled hybrid supercapacitors (HSC) with Ni-MOF derived NiO/rGO composites (300 °C) and active carbon as the cathode and anode also displayed the outstanding electrochemical performance. The value of energy density reached to 76.96 Wh·kg −1 at the power density of 400 W·kg −1 . All these results confirm that the MOF-derived NiO/ rGO composite should be a potential electrode material for supercapacitors .
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危险品化学品经营许可证（带存储）