JOURNAL OF NANOBIOTECHNOLOGY
·
2023
·Vol. 21
·期 1
·1-12
·
IF 10.2
Qiu Lirong,Ouyang Chengcheng,Zhang Wei,Liu Jia,Yu Luting,Chen Guoguang,Ren Lili
Atopic dermatitis (AD) is a chronic and recurrent inflammation disease associated with immune dysfunction. The high level of reactive oxygen species (ROS) causes high oxidative stress and further results in the deterioration of AD. At the same time, the ROS produced by bacterial infection can further aggravate AD. Here, the prepared PVA-based hydrogel (Gel) has a high ROS scavenging ability, and the antibacterial agent Zn-MOF(ZIF-8) loaded into the hydrogel shows a lasting and effective antibacterial activity. Thus, a Zn-MOF hydrogel (Gel@ZIF-8) is prepared to regulate ROS-mediated inflammatory microenvironment. In vitro experiments show that Gel@ZIF-8 has good antibacterial effect and cell biocompatibility. In the AD-induced mouse model, Gel@ZIF-8 can significantly enhance the therapeutic effect, such as reduce the thickness of epidermis, the number of mast cells and IgE antibodies. The results indicate that the ROS-scavenging hydrogel could treat the AD by regulating the inflammatory microenvironment, providing a promising treatment for managing AD.
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DOI
PubMed
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 7
·1847
·
IF 5.076
Yan Ma,Yujie Miao,Guomei Mu,Dunmin Lin,Chenggang Xu,Wen Zeng,Fengyu Xie
Great expectations have been held for the electrochemical splitting of water for producing hydrogen as a significant carbon-neutral technology aimed at solving the global energy crisis and greenhouse gas issues. However, the oxygen evolution reaction (OER) process must be energetically catalyzed over a long period at high output, leading to challenges for efficient and stable processing of electrodes for practical purposes. Here, we first prepared Fe-MOF nanosheet arrays on nickel foam via rare-earth erbium doping (Er0.4Fe-MOF/NF) and applied them as OER electrocatalysts. The Er0.4Fe-MOF/NF exhibited wonderful OER performance and could yield a 100 mA cm−2current density at an overpotential of 248 mV with outstanding long-term electrochemical durability for at least 100 h. At large current densities of 500 and 1000 mA cm−2, overpotentials of only 297 mV and 326 mV were achieved, respectively, revealing its potential in industrial applications. The enhancement was attributed to the synergistic effects of the Fe and Er sites, with Er playing a supporting role in the engineering of the electronic states of the Fe sites to endow them with enhanced OER activity. Such a strategy of engineering the OER activity of Fe-MOF via rare-earth ion doping paves a new avenue to design other MOF catalysts for industrial OER applications.Keywords:rare-earth doping;MOFs;large current;electronic structure
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PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Wang Pan,Zhou Zheng,Xingxing Wu,Jiaojiao Gao,Yani Liu,Qunhui Yuan,Wei Gan
The development of transition metal based enzyme-free glucose (Glu) sensor with high sensitivity, wide linear range, and long-term stability is highly desired. Herein, a series of 2D/3D hierarchical structured bimetallic organic framework (NiCu-MOF- x , x = 2, 4, 6, 8) were developed through a one-step hydrothermal route by adjusting the ratio of nickel and copper salts. The morphological similarity of NiCu-MOF- x and Ni-MOF was evidenced by X-ray diffraction survey. The structural evolution of NiCu-MOF- x was revealed by scanning electron microscopy. The optimal NiCu-MOF-6 exhibits high electrocatalytic activity toward Glu oxidation. Being applied as the electrode modifier for glassy carbon electrode (GCE), NiCu-MOF-6/GCE exhibits a remarkably widened linear range than its monometallic analog, owing to its significantly increased electrochemical surface area, interconnected channels for mass/electron transfer and synergistically functionalized Ni/Cu electroactive sites. Being applied in human serum analysis, this sensor shows a good feasibility with satisfying recoveries.
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高影响因子
Nano Hybrids and Composites
·
2022
·
IF 0
Yue Zhang,Tao Li,Shi Yu Tang,Xin Yue Xie,Ru Zeng Liang,Xiao Xiao Chu
Increasing demands of microwave absorbents require new approaches to enhance the absorbing performance. Metal−organic frameworks (MOFs) could be developed as effective absorbers owing to their outstanding features including intrinsic porosity and high specific area. Herein, novel nanostructured Co-MOF-74 composites have been successfully fabricated via a simple solvothermal method. Excellent absorption performance was achieved for the composite with a minimum reflection loss (RL) of −25.5 dB at 2.5 mm and a broad absorption bandwidth (RL < −10 dB) of 6.7 GHz. Such absorber could be developed as lightweight and high-efficiency absorbing materials, and this work provides inspiration for the design of advanced absorbers with strong dissipation capacity and broad effective bandwidth.
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DOI
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Xian-En Zhao,Ya-Nan Zuo,Yinghui Xia,Jing Sun,Shuyun Zhu,Guobao Xu
Although fluorescent nanozymes exhibit great potential in sensing fields, few current nanozyme-based sensors are designed to discriminate catechol (CC) from its two isomers. Herein, fluorescent metal-organic framework (MOF)-based nanozyme is utilized for ratiometric and selective detection of CC without the interferences of hydroquinone (HQ) and resorcinol (RC). NH 2 -Cu-MOF plays multiple roles: (1) it exhibits excellent photoluminescence at 435 nm owing to the 2-amino-1,4-benzenedicarboxylic acid ligand; (2) Cu 2+ imparts MOF oxidase activity to trigger the oxidation of o -phenylenediamine (OPD) into luminescent products (oxOPD) with emissive peak at 571 nm, which quenches the intrinsic fluorescence of NH 2 -Cu-MOF (435 nm) through inner filter effect (IFE); (3) Cu 2+ can complex with CC specifically to produce complex containing o -semiquinone, which not only inhibits MOF’s oxidase-like activity but also quenches the fluorescence of MOF. Therefore, the presence of CC induces the decrease of fluorescence at 571 nm followed by the slight recovery of fluorescence at 435 nm. Notably, HQ and RC have negligible influences on the fluorescence of NH 2 -Cu-MOFs/OPD system. Based on these facts, a ratiometric fluorescence platform for CC has been constructed. It exhibits high sensitivity towards CC with LOD of 0.1 μM.
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高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2023
·
IF 6.1
Beibei Zhang,Lihua Zhang,Jin Li,Jiawen Fu,Xiwei Qu
In the present work, a series of PVA and CS blend membranes were studied. These prepared membranes were evaluated by binary mixture gases of CO 2 /N 2 and CO 2 /CH 4 . The optimum ratio of PVA/CS for CO 2 permeance was achieved at 5:5. It recorded a CO 2 permeability of 20.8 GPU (1 GPU = 1 × 10 -6 ·cm 3 (STP)·cm −2 ·s −1 ·cmHg −1 ) with CO 2 /N 2 selectivity of 89.7, as well as CO 2 permeability of 10.2 GPU and CO 2 /CH 4 selectivity of 56.3. Secondly, two kinds of nanoparticle UiO-66 and UiO-66-NH 2 were used to prepare mixed matrix membranes. The effects of nanofiller content and chemical groups on gas permselectivity were investigated. Results show that the addition of nanoparticles can effectively improve the permselectivity of membrane. The mixed matrix membranes addition with UiO-66-NH 2 achieved the optimum CO 2 performance and these were following the order of PVA(5)/CS(5)-UiO-66-NH 2 > PVA(5)/CS(5)-UiO-66 > PVA(5)/CS(5). For all these membranes, the permeance and selectivity present initial increased and then decreased. Mixed matrix membranes addition UiO-66-NH 2 (containing 3.75 wt%) exhibits a CO 2 permeance of 32.77 GPU and CO 2 /N 2 selectivity of 93.47, as well as CO 2 permeance of 25.57 GPU and CO 2 /CH 4 selectivity of 70.1, which was beyond the 2008 Robeson upper bound.
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高影响因子
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
·
2016
·Vol. 22
·期 8
·1147-1155
·
IF 1.87
Habimana Fabien,Huo Yanxia,Jiang Sai,Ji Shengfu
Europium metal organic framework (Eu-MOF) was synthesized using Europium as metal ion center and 1,3,5-trimesic acid (H 3 BTC) as organic ligand under hydrosolvothermal conditions. The dynamic performance of the Eu-MOF material in adsorption desulfurization processes was investigated using a solution of thiophene/n-octane as sulfur containing quality model oil. The adsorption desulfurization kinetics equations and adsorption desulfurization isotherms of Eu-MOF were also studied. The results have shown that Eu-MOF catalyst has very good adsorption desulfurization abilities under optimum desulfurization conditions of m adsorbent : m model oil ratio of 1:100 and reaction temperature of 303 K. After 4 h of desulfurization reaction, the adsorption rate and the adsorption desulfurization capacity has reached 64.70% and 24.59 mgS/gMOF respectively. The Eu-MOF adsorption desulfurization process of thiophene on Eu-MOF fits well the quasi two level dynamic model using Langmuir isotherm, Freundlich isotherm and Dubinin–Radushkevich isotherm equations. The Dubinin–Radushkevich isotherm can be a suitable description of adsorption process for Eu-MOF absorbent on thiophene/n-octane mode oil. However the Freundlich isotherm equation model with fitting R
2 value closer to 1, can be a better description for the adsorption of thiophene. The adsorption of thiophene over Eu-MOF absorbent has two types of adsorption that occur simultaneously. These are the monolayer physical adsorption and the multilayer chemical adsorption.
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高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 9
·1394
·
IF 5.719
Daojun Zhang,Xiaobei Zhang,Yingping Bu,Jingchao Zhang,Renchun Zhang
Nonenzymatic electrochemical detection of glucose is popular because of its low price, simple operation, high sensitivity, and good reproducibility. Co-Cu MOFs precursors were synthesized via the solvothermal way at first, and a series of porous spindle-like Cu-Co sulfide microparticles were obtained by secondary solvothermal sulfurization, which maintained the morphology of the MOFs precursors. Electrochemical studies exhibit that the as-synthesized Cu-Co sulfides own excellent nonenzymatic glucose detection performances. Compared with CuS, Co (II) ion-doped CuS can improve the conductivity and electrocatalytic activity of the materials. At a potential of 0.55 V, the as-prepared Co-CuS-2 modified electrode exhibits distinguished performance for glucose detection with wide linear ranges of 0.001–3.66 mM and high sensitivity of 1475.97 µA·mM−1·cm−2, which was much higher than that of CuS- and Co-CuS-1-modified electrodes. The constructed sulfide sensors derived from MOF precursors exhibit a low detection limit and excellent anti-interference ability for glucose detection.
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高影响因子
Materials Today Chemistry
·
2022
·
IF 7.613
Y. Wei,R. Zou,Y. Xia,Z. Wang,W. Yang,J. Luo,C. Liu
Water remediation from arsenite [As(III)] is critical to environmental sustainability and human health. Metal-organic frameworks (MOFs) hold great promise for this purpose, while their efficient application requires addressing loading and activation issues. Herein, a new bionanocomposite bead UiO-66/CB was fabricated through simple gelation followed by the freeze-casting method for remediation of As(III)-contaminated water. Highly accessible UiO-66 nanoparticles are uniformly dispersed within the networking pores of the macroporous chitosan bead with high activity retention. Moreover, the fabrication strategy effectively activated the embedded UiO-66 nanoparticles, leading to improving the utilization efficiency of the active sites. The millimeter-sized UiO-66/CB-2.0 performed much more efficiently than the freely dispersed UiO-66 nanoparticles in removing As(III) and even exhibited comparable adsorption to the activated UiO-66 nanoparticles. The maximal sorption capacity of As(III) onto UiO-66/CB-2.0 was larger than 47.9 mg/g (88.6 mg As/g UiO-66) at pH 7. 1 g/L UiO-66/CB-2.0 can reduce As(III) levels (200 μg/L) in groundwater to below 10 μg/L. It could be readily regenerated and reused. Fixed-bed column adsorption by using UiO-66/CB-2.0 could treat ∼1600 bed volumes of As(III)-spiked groundwater to below 10 μg/L. This research provides a versatile route to fabricate high-performance and convenient MOFs biocomposite adsorbents for As(III) remediation.
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高影响因子
Polymers
·
2021
·Vol. 13
·期 18
·3151
·
IF 4.329
Meng Zhang,Guohui Wang,Xin Zhang,Yuqi Zheng,Shaoxiang Lee,Dong Wang,Yang Yang
In this paper, polyvinyl alcohol/Ag-Metal-organic framework (PVA/Ag@MOF) and polyvinyl alcohol/chitosan (PVA/CS) were used as the inner and outer layers to successfully prepare a bilayer composite hydrogel for tissue engineering scaffold. The performance of bilayer hydrogels was evaluated. The outer layer (PVA/CS) has a uniform pore size distribution, good water retention, biocompatibility and cell adhesion ability. The inner layer (PVA/Ag@MOF) has good antibacterial activity and poor biocompatibility. PVA, PVA/0.1%Ag@MOF, PVA/0.5%Ag@MOF, and PVA/1.0%Ag@MOF show anti-microbial activity in ascending order. However, its use as an inner layer avoids direct contact with cells and prevents infection. The cell viability of all samples was above 90%, indicating that the bilayer hydrogel was non-toxic to A549 cells. The bilayer hydrogel scaffold combines the advantages of the inner and outer layers. In summary, this new bilayer composite is an ideal lung scaffold for tissue engineering.
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高影响因子
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
·
2022
·
IF 0.847
Rui Zhai,Yindi Zhu,Limei Chang,Zhigang Gu,Jian Zhang
Metal-organic frameworks with chiral feature (chirMOFs) are attracting great attention on circularly polarized luminescence (CPL). However, developing new efficient strategy to achieve or improve CPL properties is an urgent task. Herein, new chiral MOF thin films prepared by liquid-phase epitaxial layer by layer (lbl) growth method (SUR-chirMOF) are composed of D- or L-camphorate (D/Lcam) and aminopyrazine (Pr-NH 2 ) by using liquid phase epitaxial layer by layer (lbl) method. The resulted Zn 2 (D/Lcam) 2 Pr-NH 2 SURchirMOF shows strong chirality and luminescence but weak CPL emission at 390 nm. After lbl modifying a dye molecule FluoresceinIsothiocyanate (FITC), the chiroptical Zn 2 (D/Lcam) 2 Pr-NH-FITC SURchirMOFs with ~7 times CPL signal improvement and ~3 times g lum value amplification are obtained. This work provides a new strategy to develop chiral MOF thin films for CPL improvement using lbl grafting approach.
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高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2019
·
IF 5.589
Zhaohuan Li,Jianmin Xiao,Chaowen Chen,Lina Zhao,Zhengyan Wu,Lichao Liu,Dongqing Cai
Desertification and eutrophication are two global environmental problems human beings face. Inoculating cyanobacteria to form biocrusts is considered an effective technology to inhibit desertification. The main limitation of biocrust formation is the lack of propagules and nutrients in deserts. A possible low cost source of propagules and nutrients is eutrophic water containing aquatic cyanobacteria (AC), nitrogen and phosphorus. In this study, we fabricated a network-structured nanocomposite (designated as MC) using a metal-organic framework (MOF) and carboxymethyl cellulose (CMC). MC, with a large specific surface area and numerous surface groups, had a high retention capacity for water and nutrients and good biosafety. The combination of AC-containing water (ACW) and MC could provide a suitable microenvironment in the soil, promote the growth of desert cyanobacteria (DC), formation of biocrusts and inhibition of desertification. This study provides a novel approach to simultaneously relieve desertification and eutrophication.
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高影响因子
危险品化学品经营许可证（带存储）