INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Guoying Yang,Yijin Song,Songde Han,Zhen-Zhen Xue,De-Xuan Liu,Ani Wang,Guoming Wang
Assembling a heterostructure is an effective strategy for enhancing the electrocatalytic activity of hybrid materials. Herein, CoFe-layered double hydroxide and Co-metal–organic framework (CoFe-LDH/Co-MOF) hollow heterostructure nanorod arrays are synthesized. First, [Co(DIPL)(H3BTC)(H2O)2]n [named as Co-MOF, DIPL = 2,6-di(pyrid-4-yl)-4-phenylpyridine, H3BTC = 1,3,5-benzenetricarboxylic acid] crystalline materials with a uniform hollow structure were prepared on the nickel foam. The CoFe-LDH/Co-MOF composite perfectly inherits the original hollow nanorod array morphology after the subsequent electrodeposition process. Optimized CoFe-LDH/Co-MOF hollow heterostructure nanorod arrays display excellent performance in oxygen evolution reaction (OER) with ultralow overpotentials of 215 mV to deliver current densities of 10 mA cm–2 and maintain the electrocatalytic activity for a duration as long as 220 h, ranking it one of the non-noble metal-based electrocatalysts for OER. Density functional theory calculations validate the reduction in free energy for the rate-determining step by the synergistic effect of Co-MOF and CoFe-LDH, with the increased charge density and noticeable electron transfer at the Co–O site, which highlights the capability of Co-MOF to finely adjust the electronic structure and facilitate the creation of active sites. This work establishes an experimental and theoretical basis for promoting efficient water splitting through the design of heterostructures in catalysts.
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PubMed
高影响因子
TALANTA
·
2020
·
IF 5.339
Min Liu,Junsong Mou,Xiaohan Xu,Feifei Zhang,Jianfei Xia,Zonghua Wang
In this paper, a high-performance enzyme cascade bio-platform has been developed for biosensing by combining MOFs-based nanozyme and natural enzymes. Firstly, a novel porous mixed bi-metal oxide (MnCo 2 O 4 ) derived from MOF with rod-like nanostructures was synthesized. Based on this, the nanozyme of bovine serum albumin-Pt [email protected] MnCo 2 O 4 ( [email protected] 2 O 4 ) was successfully synthesized and used to construct enzyme cascade bio-platform. The nanozyme had unique physicochemical surface properties and hierarchical structure. Due to the synergistic effect of protein, bimetal oxide and PtNP, the nanozyme presented excellent dual enzyme activity . On the one hand, [email protected] 2 O 4 can be used as nanozyme with oxidase activity to achieve superior detection of glutathione with detection limit of 0.42 μM. On the other hand, BSA- [email protected] 2 O 4 can also be used both as the nanozyme with great peroxidase activity and as a scaffold for immobilization of glucose oxidase (GOx), guiding an organized high-efficiency enzyme cascade bio-platform. The platform combined advantages of nanozyme and natural enzyme, and provided excellent glucose detection with the detection limit of 8.1 μM. The tandem catalytic system not only broadened the application of nanozyme in natural enzyme catalysis, but also provided a simple, efficient and organized enzyme cascade bio-platform for biosensing and other applications.
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·Vol. 14
·期 1
·120629
·
IF 7.2
Lijun Hu,Qian Huang,Meng Li,Ju Zhang,Qi Xue,Jiayi Wang,Caiwen Li
The parasitic dinoflagellate in Hematodinium genus causes significant economic losses to fishery and aquaculture of multiple valuable marine crustaceans. It is practically needed to develop an effective and environmentally compatible method to control the Hematodinium epidemics in mariculture. In the present study, a novel Z-scheme composite photocatalyst was synthesized successfully using Zinc oxide (ZnO) and Copper Metal-Organic Framework (Cu-MOF), The N-Cu-MOF photocatalyst showed superior charge carrier separation efficiency compared to Cu-MOF, and exhibited significantly improved visible-light absorption in contrast to the activation of ZnO only under UV light. The ZnO/N-Cu-MOF photocatalyst demonstrated excellent inactivation of Hematodinium perezi microspores, with half maximal inhibitory concentration (IC 50 ) values of 3.12 mg/L at 1 h and 1.01 mg/L at 2 h. The inactivation effects involved the generation of large amounts of intracellular reactive oxygen species (ROS), which induced oxidative stress and disrupted the membrane and flagella structural integrity of the dinospores, ultimately leading to cell necrosis induced by oxidative damage. The present study provided a new insight and approach for seawater treatment of mariculture facilities, thereby to prevent and control spreading of Hematodinium epidemics in commercially valuable crustaceans.
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产品关联
DOI
高影响因子
TRANSITION METAL CHEMISTRY
·
2025
·Vol. 51
·期 1
·6
·
IF 1.7
Ma Xueying,Yu Guomin,Li Yinghua,Li Hui,Wang Hongfang,Jia Xu,Cui Tiebing
To address the challenge of antibiotic residue remediation, this study employed a hydrothermal method to in-situ construct a bimetallic indium/gallium-based MIL-68 heterostructure on the surface of two-dimensional montmorillonite (MMT). By integrating metal node electronic structure regulation with interface engineering strategies, it provides a feasible approach to improve the low charge carrier separation efficiency in metal-organic framework (MOFs) materials. Experimental results demonstrate that when the MMT loading is 20%, the composite material exhibits obvious enhanced photocatalytic performance for the degradation of 40 mg/L tetracycline solution, with a degradation rate of up to 97% within 60 min using 10 mg of catalyst. This improvement is attributed to the synergistic effect of In/Ga bimetals and the interface charge transfer channels of the MMT 2D matrix, which together induce a Z-type charge carrier migration mechanism, enhancing the separation efficiency of photo-induced electron-hole pairs. After four cycles, the MIL-68(In/Ga)/MMT composite showed good cycling stability and demonstrated broad-spectrum degradation capability, achieving degradation rates of 99% and 79% for rhodamine B and methyl orange, respectively. This composite material shows good photocatalytic performance in dye degradation, providing new research insights for the field of photocatalytic degradation of pollutants.
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高影响因子
Journal of Physical Chemistry C
·
2024
·
IF 3.3
Da Shu,Ruipeng Fan,Songyou Yao,He Jiang,Xiaoyue Zhang,Yue Zheng
Understanding the rotor dynamics within metal–organic frameworks (MOFs) is fundamental to the desired amphidynamic application. However, in-depth investigation has been hindered due to the inadequacy of current characterization tools. In this paper, a technique based on infrared-combined atomic force microscopy (AFM-IR) was developed, in which the infrared spectrum can be obtained under tip bias and tip force with nanometer resolution. The tip bias induced variation in infrared spectra of the Cu2(fbdc)2(dabco) film demonstrates that full width at half-maximum of the vibration–rotation coupling mode is competent for rotor speed characterization. Stalling of dipolar rotor speed in the Cu2(fbdc)2(dabco) film is observed under both tip bias and tip force, which indicates the electrical and mechanical controllability of MOF rotor dynamics. On this basis, the rotor behavior of few-layer MOF films is investigated to reveal the influence of self-assembled molecule stress on rotor dynamics. It is found that the rotor rotation is activated progressively as the film grows and self-assembled molecule stress releases. Our results pave the avenue for direct study of rotor dynamics within MOF films at the nanoscale.
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高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2024
·Vol. 39
·期 6
·1337-1347
·
IF 1.3
Yue Song,Gong Lunjun,Yang Tonghui,Hu Weida,Liu Xiaopan,Gao Pengzhao,Xiao Hanning
We took Co 0.2 Ni 0.8 -MOF-74 with bimetallic synergistic effect as the basic material, and selected rare earth ions Ho, Gd, and Er with ion radii close to Co and Ni as the research objects for doping. The influence of rare earth ion doping amount and doping type on the eNRR performance of the catalyst was explored. The experimental results show that the ammonia yield rate and Faraday efficiency doped with Co 0.2 Ni 0.8 -MOF-0.5Ho are the highest, reaching 1.28 × 10 −10 mol·s −1 ·cm −2 /39.8%, which is higher than the 1.12 × 10 −10 mol·s −1 ·cm −2 /32.2% of Co 0.2 Ni 0.8 -MOF-74, and is about 14.3%/23.7% higher than that without doping, respectively. And the stability of Co 0.2 Ni 0.8 -MOF-0.5Ho is good(after 80 hours of continuous testing, the current density did not significantly decrease). This is mainly due to doping, which gives Co 0.2 Ni 0.8 -MOF-74 a larger specific surface area and catalytic active sites. The catalyst doped at the same time has more metal cation centers, which increases the electron density of the metal centers and enhances the corresponding eNRR performance.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Wenyan Li,Yumei Li,Xinggui Wen,Yakun Teng,Jing Wang,Tianyi Yang,Xiang Li,Lijuan Li,Ce Wang
High-performance and low-cost hemodialysis membranes are urgently needed by patients suffering from end-stage renal disease. Here, we designed a flexible multifunctional Zr-MOF anchored polyacrylonitrile (PAN) nanofiber membrane (UAPNFM), which has good adsorption, dialysis, and regeneration ability. A novel adhesive layer modification method was used to make UIO-66-(COOH) 2 nanocrystals grow in-situ on the composite nanofibers . The UIO-66-(COOH) 2 nanocrystals were uniformly and stably anchored on the nanofibers with the content of 54.99 wt%. The obtained UAPNFM has the capability to effectively remove uremic toxins with excellent retain protein rate. The Langmuir isotherm and pseudo-second-order kinetic model can be applied to better describe the adsorption process . The maximum adsorption capacity of UAPNFM for creatinine reached 168.63 mg/g. After 4 h of simulate dialysis, the clearance rate of creatinine was 82.48% and the protein retention rate of bovine serum albumin (BSA) by the UAPNFM was 93.09%. In addition, after four cycles, the removal efficiency for creatinine still remained at 82.31%. The results show that the UAPNFM has good regenerability. Moreover, the composite nanofiber membrane exhibited satisfactory blood compatibility. Therefore, this unique flexible Zr-MOF anchored polymer composite nanofiber membrane with an outstanding creatinine removal performance provides a new opportunity for cost reduction for clinical hemodialysis.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Heng Mao,Shen-Hui Li,Ao-Shuai Zhang,Li-Hao Xu,Jiao-Jiao Lu,Zhi-Ping Zhao
With the help of density functional theory calculations, a unique MOF-capped nanotube architecture was initially conceived in this study based on the solution-diffusion mechanism. Then, the novel ZIF-8-capped halloysite nanotubes (ZHNTs) were prepared and incorporated in the polydimethylsiloxane (PDMS) bulk to achieve the mixed matrix membranes (MMMs) for n -butanol permselective pervaporation . The remarkable characteristic of this membrane was that the HNT lumen (∼25 nm) in ZHNTs provided the exquisite diffusion highway for the penetrants that were first selected through the capping ZIF-8 layer. Simultaneously, the close connection of ZIF-8 layer on external surface of ZHNTs created the relatively continuous pathways for molecular permeation. As expected, the embedding ZHNTs significantly improved the separation performances of the membranes. Impressively, the as-obtained membrane acquired a high separation factor of 61.3 (58.7% higher than that of PDMS control membrane) with a comparable flux of 683 g m -2 h -1 (2.43-fold as much as that of PDMS control membrane) at 40 °C in the separation of 1 wt% n -butanol aqueous solution. Moreover, the presence of ZHNTs conferred excellent interfacial compatibility, mechanical properties, and good long-term stability on the resultant membranes. This study may shed light on the rational design of high-performance MMMs for biofuels recovery from fermentation broths .
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高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Jiangning Li,Qianyun He,Yichao Lin,Lei Han,Kai Tao
Highly active and stable oxygen evolution reaction (OER) electrocatalysts for water electrolysis are currently in high demand. Herein, a rationally designed three-dimensional (3D) CoFe selenide porous array (Fe–CoSe PA) is synthesized through ion exchange from zeolitic imidazolate framework-L (ZIF-L) nanoarray, followed by a facile selenization under hydrothermal conditions for OER electrocatalysis. During the OER process, the surface of Fe–CoSe PA is rapidly oxidized to CoFe oxides/hydroxides, which prevents the inner layer from being oxidized. Benefiting from the high porosity, abundant active sites, and the high conductivity of inner Fe–CoSe, Fe–CoSe PA exhibits excellent OER performance, with an overpotential of 285 mV at a current density of 10 mA cm–2, and a small Tafel slope of 68 mV dec–1, as well as high stability under 50 h of continuous testing. The present work could provide a facile route for fabricating 3D porous selenides for highly efficient OER catalysis.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Lan Guo,Yuan Liu,Rongmei Kong,Guang Chen,Hao Wang,Xiuli Wang,Lian Xia,Fengli Qu
β-Glucuronidase (β-GCU) is closely related to the occurrence of multiple diseases, and it has been applied as a biomarker and therapeutic target in clinical diagnosis. However, reliable methods with high selectivity and sensitivity for monitoring β-GCU are still lacked. Herein, we designed a novel fluorescent nanoprobe, rhodamine B encapsulated MOF-5 (RhB@MOF-5) for the first time, to detect β-GCU through the synergistic effect of inner filter effect (IFE) and static quenching effect (SQE) by employing 4-nitrophenyl-β-D-glucuronide (PNPG) as the substrate. After encapsulating into MOF-5, the fluorescence emission of RhB at 550 nm excited by 320 nm was greatly enhanced. The major overlap between the fluorescence excitation spectrum of RhB@MOF-5 (about 320 nm) and the ultraviolet absorption spectrum of PNPG (about 310 nm) lead to PNPG being a good IFE absorber in this sensing system. Under the optimized conditions, the excitation spectrum of the RhB@MOF-5 could be absorbed by PNPG, resulting in the dramatically decrease of fluorescence emission. After adding β-GCU into the system, the substrate of PNPG would be enzymatic hydrolyzed to p -nitrophenol (PNP) and glucose, then the IFE disappearance and the fluorescence recovered. The current sensing platform was interference-free and exhibited a broad linearity relationship for β-GCU range of 0.1–10 U L −1 (R 2 = 0.9957) with a limit of detection as low as 0.03 U L −1 , which was reduced by more than one orders compared with the reported methods. Moreover, the encapsulation of dyes using porous nanoparticles to achieve some tailor-made characteristics will enrich experimental design inspiration.
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高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 15
·8131-8140
·
IF 11.9
Chengjie Wang,Zhendong Hao,Yating Hu,Yue Wu,Jingbing Liu,Yuhong Jin,Hao Wang,Qianqian Zhang
Lithium dendrites are a major issue that restrict the commercialization of lithium metal batteries. It is well-accepted that lithium dendrite nucleation can be suppressed by improving the Li+ transference number based on the classical Sand's time principle. Here, a self-standing anionic metal–organic framework (MOF)-based functional separator with small pores is developed by simple doctor-blading to accelerate Li+ transport for an improved lithium metal anode. The design of this separator is based on the nano-confined channels of the MOF and negatively charged moieties (–SO3−) on the surface. Benefiting from the strong electrostatic interaction between the negatively charged nanochannels and ions within the liquid electrolyte, the anion transport is effectively suppressed, while the lithium-ion transmission is accelerated. Consequently, a high Li+ transference number of up to 0.85 is achieved within the liquid electrolyte, which enables ultra-stable Li plating/stripping on the lithium metal anode for over 4000 h at a high current density of 5 mA cm−2. This work is expected to provide new insight into the development of dendrite-free and high-rate lithium metal batteries.
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高影响因子
Functional Materials Letters
·
2024
·
IF 1.2
Yuqi Li,Jianghong Xu,Sujuan Guo
The application of microwave technology has penetrated all aspects of life, but also lead to the electromagnetic pollution, therefore the research of high efficiency microwave absorption materials has been widely concerned. In this work, a new type of Al based CAU-10-H MOF was prepared by hydrothermal method. The particles were polyhedral in size of 2 μ m. After high temperature annealing, the interplanar spacing increased with the annealing temperature, and the lattice structure was destroyed at 400 ∘ C. CAU-Al/rGO aerogels were prepared by freeze-drying of hydrogels. With the increase of CAU-Al content and the annealing temperature, the carbon crystallinity decreases, and the pores of the aerogels became larger and fluffier. The real parts of permittivity of CAU-Al/rGO aerogels were between 5 and 30, which can be tuned by the annealing temperature and CAU-Al content. For the microwave absorption performance, the CAU-Al/rGO aerogel with a ratio of 3:1 achieved the minimum reflection loss of − 37.8 dB at 3 mm. Moreover, the CAU-Al/rGO aerogels showed a wide effective bandwidth, which reached 5.1 GHz under the thickness of 2.5 mm. Therefore, the CAU-Al/rGO aerogels could be used as a kind of broadband microwave absorber with excellent microwave absorption performance.
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高影响因子
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