SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Ruhui Hu,Suyun Zhong,Hezhen Liu,Yawen Liu,Hongxia Chen,Xiaojun Hu
A dual-ligand Cu-MOFs (Cu-F/Hs) based on phenylalanine (Phe) and histidine (His) was innovatively constructed with enhanced catalytic property. Among them, Phe can interact with the dopamine (DA) to enhance the substrate affinity. Meanwhile, the coordination of His with copper ions was inspired by the active site structure of natural laccase to improve the catalytic activity. The K m value of Cu-F/Hs was 0.14 times of laccase, indicating a high affinity for the catalytic substrate DA. Accordingly, a sensitive sensor for PD-L1 detection was designed by using Cu-F/Hs, which can catalyze DA to form redox-active polymeric conjugates deposited on the electrode surface with good electrical conductivity, thereby contributing a “signal-down” electrochemical response with a double signal enhancement. The detection limit was 0.12 ng/mL in the detection range of 0.5 – 200 ng/mL. This work provided a new and simple way to synthesize MOFs with high substrate affinity and efficient activity, and a general signal amplification strategy induced by the catalytic deposition.
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Bioactive Materials
·
2023
·
IF 18.9
Jianqiu Yang,Zhenzhen Huang,Jiang Tan,Jingye Pan,Shixuan Chen,Wenbing Wan
Bacterial infection and scar formation remain primary challenges in wound healing. To address these issues, we developed a decellularized pomelo peel (DPP) functionalized with an adhesive PVA-TSPBA hydrogel and antibacterial gallic acid/copper MOFs. The hybrid wound dressing demonstrates favorable biocompatibility. It does not impede the proliferation of fibroblasts or immune cells and can stimulate fibroblast migration, endothelial angiogenesis, and M2 macrophage polarization. Additionally, the dressing can scavenge reactive oxygen species (ROS) and provide antioxidant effects. Furthermore, DPP + MOF@Gel effectively inhibits the viability of S. aureus and E. coli in vitro and in vivo. The histological observations revealed enhanced granulation tissue formation, re-epithelialization, and angiogenesis in the DPP + MOF@Gel group compared to other groups. The local immune response also shifted from a pro-inflammatory to a pro-regenerative status with DPP + MOF@Gel treatment. The skin incision stitching experiment further exhibits DPP + MOF@Gel could reduce scar formation during wound healing. Taken together, the hybrid DPP + MOF@Gel holds great promise for treating bacteria-infected skin wounds and inhibiting scar formation during wound healing.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Yue Wang,Hongguo Zhai,Qi Guo,Yuhao Zhang,Xia Sun,Yemin Guo,Qingqing Yang,Yanyan Zhang
Heavy metals and foodborne pathogens have become key pollutants that harm aquatic products, seriously endangering food safety and human health. Therefore, in this study, a ratiometric electrochemical aptamer sensor with a novel signal amplification strategy was constructed using ZrO 2 as the substrate and Ni/Co-MOFs@AuNPs cubic nanomaterials to increase the specific surface area to simultaneously detect Cd 2+ and S.aureus. The shared hairpin complementary chains modified with ferropene (Fc) could simultaneously bind to the Cd 2+ and S.aureus aptamers modified with methylene blue (MB) and anthrquinone-2-carboxylic acid (AQ). The ratios of MB and AQ to Fc were used to realize the qualitative and quantitative detection of Cd 2+ and S.aureus. Under the optimal conditions, the electrochemical aptamer sensor for Cd 2+ and S.aureus was in the range of 1.00 × 10 −2 -1.00 × 10 4 ng/L and 1.00 × 10 1 -1.00 × 10 7 CFU/mL, and the lowest detection limit was 1.91 × 10 −4 ng/L and 1.37 CFU/mL, respectively. The aptasensor constructed in this paper can realize the simultaneous detection of Cd 2+ and S.aureus in scallop and fish, providing a new detection method for the simultaneous detection of a variety of aquatic products pollutants.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Hao Yu,Xin Kou,Xueqing Zuo,Ding Xi,Haijun Guan,Pengfei Yin,Lijia Xu,Yongpeng Zhao
Metal-organic frameworks (MOFs) derived composites are extremely potential electromagnetic wave (EMW) absorbers. However, the permittivity of absorbers directly derived from MOFs with solid structure is usually relatively low, inevitably limiting their further applications. Cation substitution can primely overcome the problem by regulating the morphology and atomic space occupation to enhance multiple loss mechanisms and impedance matching characteristics. However, universal mechanisms of the effect on EMW absorption performance influenced by cation substitution are still comparatively inadequate, which prospectively requires further exploration. Herein, a series of imidazolic MOFs were fabricated by ultrasonic symbiosis method and tailored by subsequent cation substitution strategy to prepare target porous composites. At a low filling rate and thin thickness, the as-obtained samples reach the optimal reflection loss and effective absorption bandwidth values of –49.81 dB and 7.63 GHz, respectively. The intercoupling between multiple atoms lays a significant foundation for abundant heterogeneous interfaces and defect vacancies, which effectively ameliorate the attenuation mechanisms. Meanwhile, the porous structure introduced by cation substitution reduces the bulk density to enhance the impedance matching and multiple reflections simultaneously. This study provides a helpful idea to exceedingly improve the EMW absorbing performance of imidazolic MOFs-derived composites by cation substitution.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Ming yang,Yuxin Zhou,Dandan Zhang,Fang Zhou,Hui Ning,Maoxia He,Ru-an Chi,Weiyan Yin
Developing a high-performance adsorbent for the recovery of Gd(III) from wastewater is of great environmental and economic significance. Metal organic frameworks (MOFs) functionalized with mixed-linker defect strategy hold huge potential for use as adsorbents for removing heavy metal ions from wastewater. However, the defective MOFs still show a relative low selectivity to target metal ions. Herein, we propose the combination of surface-imprinting and defect engineering strategies to synthesize Gd(III) ion-imprinted polymers (G-IIPs) based on mixed-linker Zr-MOFs, and apply them for capturing Gd(III) ions from wastewater. It is worth noting that 2-hydroxyphosphonoacetic acid not only served as monodentate ligand to in-situ induce ligand vacancies and form hierarchical pores on UiO-66-NH 2 , but also as high-efficient functional monomer in imprinted layer to provide the strong coordination ability towards Gd(III). Benefiting from its abundant binding sites and hierarchical pore structure, the as-prepared G-IIP-3 with rich defects displays a high adsorption capacity of 181.75 mg·g −1 and a short equilibration time of 30 min for Gd(III). In addition, G-IIP-3 presents highly selective capture of Gd(III) over interfering ions. Furthermore, density functional theory calculation demonstrates that both phosphate group and Zr-O cluster play key roles in the Gd(III) adsorption process. Thus, this work provides an effective method to develop high-performance materials for Gd(III) recovery by organically combining the advantages of surface-imprinting and defect engineering strategies.
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Analytical Methods
·
2023
·Vol. 16
·期 5
·731-741
·
IF 3.1
Liyuan Yu,Mengxiao Lv,Ting Zhang,Qixin Zhou,Juanhua Zhang,Xuexiang Weng,Yongming Ruan,Jiuju Feng
Herein, we present a simple and mild method to in situ prepare CuO nanostructures for non-enzymatic glucose sensing. A Cu-metal organic framework (Cu-MOF) precursor was first directly grown on a pencil lead electrode with 3D graphene-like surfaces (EPLE) and then in situ transformed into CuO nanorods. The CuO nanorod-modified EPLE (CuO/EPLE) shows high sensitivity (1138.32 μA mM−1 cm−2), fast response time (1.5 s) and low detection limit (0.11 μM) for glucose oxidation. It has been found that NaOH promoted the generation of ˙OH groups and Cu(III) on the CuO surface, which then facilitated the electrochemical oxidation of glucose. Signals characteristic of hydroxyl and carbon-centered radical adducts were detected by EPR. Furthermore, the CuO/EPLE sensor also shows good accuracy in glucose determination in human serum samples.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Chen Hou,Wenqiang Chen,Linhui Fu,Sufeng Zhang,Chen Liang,Yang Wang
Perfluorooctanoic acid (PFOA) has demonstrated potential toxicity to human health and has been detected in different environmental matrices due to its stable physical and chemical properties. To degrade PFOA under solar light irradiation, we fabricated a lignin/polyvinyl alcohol (PVA)/Co/Fe metal-organic frameworks (lignin/PVA/bi-MOFs) composite membrane via a typical electrospinning and in-situ solvothermal method for the catalytic degradation of PFOA. In the peroxymonosulfate (PMS)/membranes/solar light system, Electron paramagnetic resonance analysis (EPR) demonstrated the sulfate radicals (SO 4 − ) and hydroxyl radicals (OH ) were generated by activating PMS with transition metal and solar light irradiation. Lignin/PVA/bi-MOFs showed outstanding performance in that 89.6% of PFOA was degraded within 3 h under optimal conditions. Compared with that in solar light, only 59.6% PFOA was degraded in the dark, and the rate constant of PFOA degradation decreased from 0.0150 min −1 to 0.0046 min −1 . Moreover, lignin/PVA/bi-MOFs were reused after simply rinsing with ultra-pure water and the degradation capacity of lignin/PVA/bi-MOFs remained at 77% after 4 cycles. The results might provide a new concept for the design of bimetallic MOFs for applications in organic pollutant removal.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Ping-Ping Sun,Yu-Hang Zhang,Hongwei Shi,Fa-Nian Shi
Two new 3-dimensional (3D) 3d-4f bimetal organic frameworks (ZnCe-MOF and CuCe-MOF) were created through hydrothermal method. These MOFs have the similar formula (M 2 (imidazole) 2 Ce(H 2 O)(C 2 O 4 ) 1/2 (4,5-ida) 2 ·2(H 2 O), M = Zn, Cu; 4,5-ida: 4,5-imidazole dicarboxylate) and possesses monoclinic symmetry in the P2 1 /n space group. The electrodeposition method was used to in-situ coat polyaniline (PANI) to improve the electrical conductivity. As the electrode materials for supercapacitors in three-electrode system, the specific capacitance of CuCe-MOF@PANI-1 and ZnCe-MOF@PANI-1 electrodes can reach 724.4F g −1 and 713.2F g −1 at 1 A g −1 . Using the as-synthesized CuCe-MOF@PANI-1 heteorostructure as positive material, the assembled hybrid capacitor delivers an energy density of 87.45 Wh kg −1 and 58.05 Wh kg −1 at power density of 850 W kg −1 , demonstrating that the heteorostructure of MOF coated with PANI has promising applications in portable energy storage devices.
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RSC Advances
·
2021
·Vol. 11
·期 6
·3371-3379
·
IF 3.361
Zesheng Chen,Kun-huan He,Runzhi Wei,Yiju Lv,Zheng Liu,Guo-Cheng Han
A new metal–organic framework (MOF) compound [Mn2(2,2′-bca)2(H2O)2]n (Mn-MOFs) was successfully synthesized by solvothermal method, and Mn-MOFs@Zn material was prepared by loading zinc phosphate onto Mn-MOFs by ball milling, then Mn-MOFs@Zn was added to the water-based acrylic paint to prepare Mn-MOFs@Zn@acrylic coating. The AC impedance test results showed Mn-MOFs@Zn@acrylic coating has higher corrosion inhibition performance and stability to mild steel when compared with blank coating. The impedance modulus of the blank coating in the low frequency region decreased by 90%, and the Rct showed a trend of first increasing and then decreasing over time, the maximum Rct was only 303.8 Ω, which was only Mn-MOFs@Zn@acrylic coating one-seventh of the Rct value. The artificial scratch experiment showed that the Mn-MOFs@Zn@acrylic coating only slightly corrodes at the scratches, because Mn-MOFs@Zn material made the coating a self-repairing function and improved the durable anticorrosion performance of the acrylic coating.
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Journal of Materials Chemistry C
·
2020
·Vol. 9
·期 1
·238-248
·
IF 7.059
Qigao Shang,Nannan Liu,Dan You,Qingrong Cheng,Guiying Liao,Zhiquan Pan
Two coordination polymers, {[Cu3(tib)4(NO3)4(H2O)]·2NO3·2.96H2O}n (1) and {[Ni(tib)2]·2NO3}n (2), were synthesized by a solvothermal reaction using a flexible tripodal ligand, 1,3,5-tris(imidazol-1-ylmethyl)benzene (TIB), and metal salts; the polymers were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, X-ray photoelectron spectroscopy and UV-vis diffuse reflectance spectra. The two complexes exhibited excellent active performance for photodegradation of tetracycline (TC) and photocatalytic hydrogen evolution under visible light. Control experiments revealed clearly that the pH value plays an important role in TC degradation, especially in alkaline solution; 93.21% of tetracycline was degraded by complex 1 within 60 min. In addition, using a Pt cocatalyst, the visible-light-driven photocatalytic H2 evolution rate of complex 2 reached 681.66 μmol h−1 g−1. Moreover, the photocatalysts can remain stable and retain high photocatalytic activity after several cycles of reuse. These MOF-based photocatalysts will provide new efforts for environmental purification and hydrogen evolution.
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POLYMERS FOR ADVANCED TECHNOLOGIES
·
2020
·Vol. 31
·期 12
·2967-2979
·
IF 2.578
Chao Ma,Jide Wang,Liqin Cao
The current study reports the utilization of MIL-100(Fe) as Pickering emulsifiers to stabilize CO 2 -in-water high internal phase emulsions, thereby synthesizing interconnected macroporous hybrid monoliths with adjustable pore sizes. During such a green synthesis procedure, the influences of Fe-MOF type and content, carbon dioxide density, and the amount of crosslinker have been explored respectively. The as-synthesized MOF-containing poly(HIPE)s were characterized by FT-IR, XRD, SEM, CLSM, and TGA. The morphology of the monoliths was mainly observed by EDS-mapping and SEM, which showed that Fe-MOFs were uniformly distributed into the monolithic matrix and the void sizes and interconnected pore sizes were 20 to 150 μm and 5 to 50 μm, respectively. Furthermore, the MIL-100(Fe)-containing monoliths exhibited an excellent elasticity and can quickly return to their original state when reaching up to 90% compressive strain without failing. To evaluate the adsorptive properties of the composite monoliths, the immobilization of β-amylase on the obtained monoliths was studied. The results of immobilized enzymes showed that the highest protein adsorption rate can reach 55% and the immobilization efficiency can reach 89%. Since our synthetic route is clean and controllable, biocompatible monoliths with good elasticity and toughness were prepared, which presents a viable strategy to produce hybrid monoliths for bio-medical applications.
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CARBOHYDRATE POLYMERS
·
2020
·
IF 7.182
Chen Hou,Wenqiang Chen,Linhui Fu,Sufeng Zhang,Chen Liang,Yang Wang
In this study, a sulfate radical-advanced oxidation process (SR-AOP) was proposed by utilizing a bimetallic Co/Fe metal-organic frameworks/cellulose nanofiber membrane (Co/Fe bi-MOFs/CNF) as a catalyst for TBBPA degradation. Sulfate radicals (SO 4 –) and hydroxyl radicals (OH · ) were generated through the activation of peroxymonosulfate (PMS) by Co/Fe bi-MOFs/CNF. Co/Fe bi-MOFs/CNF was prepared by a facile solvothermal method and vacuum filtration. CNF acted as a natural substrates material to relieve the agglomeration of loaded MOFs . Additionally the composite membranes was easily separated from the reaction solution. The properties of the composite materials and the main factors that influenced TBBPA degradation were elucidated in detail, along with the TBBPA degradation intermediates, recyclability, and TBBPA degradation pathway. Almost 100 % of TBBPA was degraded within 30 min under optimal conditions, and the rate constant was determined to be 0.764 min −1 . Furthermore, the degradation rate of the composite membrane was 60 % after 4 cycles.
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