JOURNAL OF THE CHINESE CHEMICAL SOCIETY
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2022
·Vol. 69
·期 5
·831-839
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IF 1.753
Tong Yu,Bin Wang,Li-Ping Yu
In this work, a novel pH-responsive hybrid hydrogel namely MOF/PC hydrogel was prepared by incorporating metal–organic framework CDs@UiO-66(OH) 2 into the matrix of photonic crystal hydrogel. MOF/PC hydrogel could display colorful structure colors under visible light and emit blue fluorescence under UV light owing to the stop-bond effect of photonic crystal and fluorescence emission capacity of CDs@UiO-66(OH) 2 , respectively. Benefiting from these two optical phenomena, MOF/PC hydrogel could work as a dual-mode color-changing sensor, in structure color mode and fluorescence mode, for the sensing of pH. When incubating in aqueous solutions with different pH values, MOF/PC hydrogel could adjust its structure color to the corresponding one ranging from green to pink in 10 s, and this visible color-changing can be used to determine the approximate pH values of the sample by naked eyes without any assistance of instruments. As for the fluorescence mode, the fluorescence intensity of MOF/PC hydrogel showed a good linear relationship with pH value in the range of 3.0~7.0, and it can be used to determine the pH value of aqueous solutions quantitatively. Moreover, the as-prepared sensor is reusable and can be applied to the pH sensing of real water samples.
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MATERIALS LETTERS
·
2022
·
IF 3.574
Long Zhang,Lifan Nie,Shaohui Zhang,Zhaobo Dong,Quan Zhou,Ziang Zhang,Ge-Bo Pan
High permittivity nanocomposites have recently received extensive attention for their potential applications in energy storage and flexible electronics. In this paper, 2D conductive MOF Ni 3 (HHTP) 2 was modified onto the MXene nanosheets for fabricating high permittivity poly (vinylidene fluoride) (PVDF) nancomposites with low dielectric loss. The SEM, TEM and XRD results confirm the Ni 3 (HHTP) 2 MOF was grafted on MXene nanosheets successfully. The MOF-MXene/PVDF nanocomposite exhibits a high permittivity of 530 with dielectric loss of 0.49 at 4.76 wt% under 1 kHz.
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E-POLYMERS
·
2022
·Vol. 22
·期 1
·399-410
·
IF 3.074
Jiawen Wang,Ye Sun,Xuemei Zhao,Lin Chen,Shuyi Peng,Chunxin Ma,Gaigai Duan,Zhenzhong Liu,Hui Wang,Yihui Yuan,Ning Wang
Although metal–organic frameworks (MOFs) own excellent uranium adsorption capacity but are still difficult to conveniently extract uranium from seawater due to the discrete powder state. In this study, a new MOF-based macroporous membrane has been explored, which can high-efficiently extract uranium through continuously filtering seawater. Through modifying the UiO-66 with poly(amidoxime) (PAO), it can disperse well in a N,N -dimethylformamide solution of graphene oxide and cotton fibers. Then, the as-prepared super-hydrophilic MOF-based macroporous membrane can be fabricated after simple suction filtration. Compared with nonmodified MOFs, this UiO-66@PAO can be dispersed uniformly in the membrane because it can stabilize well in the solution, which have largely enhanced uranium adsorbing capacity owing to the modified PAO. Last but not least, different from powder MOFs, this UiO-66@PAO membrane provides the convenient and continuously uranium adsorbing process. As a consequence, the uranium extraction capacity of this membrane can reach 579 mg·g −1 in 32 ppm U-added simulated seawater for only 24 h. Most importantly, this UiO-66@PAO membrane (100 mg) can remove 80.6% uranyl ions from 5 L seawater after 50 filtering cycles. This study provides a universal method to design and fabricate a new MOF-based adsorbent for high-efficient uranium recovery from seawater.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Mengtong Xia,Yu Yan,Haiyan Pu,Xuening Du,Jingyi Liang,Yaning Sun,Jiani Zheng,Yue Yuan
In photodynamic therapy (PDT), the concentration of reactive oxygen species (ROS) generated in cells directly determines the therapeutic effect. However, excessive glutathione (GSH) concentration at the tumor site and hypoxic environment strongly reduce the production of ROS. Nitric oxide (NO) has a variety of anti-tumor activities, including the induction of cell apoptosis and sensitization to PDT, so it is in the spotlight in the area of cancer intervention. Therefore, it is very innovative to combine NO therapy with PDT and simultaneously reduce GSH content and relieve hypoxia. Metal-organic framework (MOF) is an emerging drug delivery vehicle that can exert photodynamic effects when a photosensitizer is used as its organic ligand. In this study, we constructed a GSH-responsive NO producing nanosystem to enhance ROS production through GSH depletion and hypoxia alleviation. Briefly, nicorandil (Nic) is encapsulated into porous porphyrinic MOF nanoparticles, and hyaluronic acid (HA) is electrostatically adsorbed on the surface of the MOF nanoparticles for CD44 receptor-targeting and prevention of Nic leakage. Notably, the Nic reacts with GSH to produce NO gas with vasodilation and GSH reduction, thus improving oxygen supply for efficient ROS generation. Moreover, the generated NO can further react with superoxide radical anion to produce highly reactive peroxynitrite (ONOO − ) molecules with higher cytotoxicity. Overall, the [email protected] nanosystem combines NO gas therapy with PDT, resulting in a significant increase in ROS production and greatly enhancing the efficacy of PDT.
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ANALYTICAL LETTERS
·
2022
·
IF 2.267
Zhengjie Hu,Zhiying Chen,Xuwei Chen
Adsorbents for protein enrichment underline the most important foundations in proteomic application. The construction of tunable metal-organic framework (MOF) through rational selection of metal nodes and organic linkers with designed properties has attracted special interest in the field of protein enrichment. In this work, a nickel-based MOF (NiBPDC) composed of biphenyl-based organic ligand and Ni clusters was prepared which exhibits attractive adsorption efficiency and selectivity for hemoglobin (Hb) by taking advantage of the strong metal affinity and π stacking interaction between Hb and MOF. The adsorption maximum capacity of NiBPDC for Hb is 400.2 mg g−1, and the adsorbed Hb is easily recovered by 0.5% (m/v) sodium dodecyl sulfate achieving a recovery of 98.2%. An enrichment factor up to 79.8 for Hb from an extremely 300:1 mass ratio of a human serum albumin/Hb mixture was achieved. Circular dichroism (CD) spectra reveal that the recovered Hb maintained its original structure following the enrichment. The practicability of NiBPDC is confirmed by selective enrichment of Hb from complex biological samples followed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) analysis.
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FUEL
·
2022
·
IF 8.035
Yeshuang Wang,Chao Yang,Chaonan Zhang,Mingxian Duan,Hui Wang,Huiling Fan,Yuankai Li,Ju Shangguan,Jianying Lin
Hierarchical porous MOF-199 with small crystal sizes was synthesized via PVP (Polyvinylpyrrolidone) regulation in an aqueous system, in which PVP acted as nucleating, coordination and template agent. The ambient desulfurization performance of the obtained MOF-199 regulated with different PVP amounts toward CH 3 SCH 3 and H 2 S and their structure-performance relationship were systematically studied. It is found that CH 3 SCH 3 was first chemisorbed on the surface of the adsorbent in a monolayer by weak coordination and then physisorbed in multilayers. This whole process was reversible and the structure of MOF kept stable. The hierarchical pores plus the small crystal size of MOF-199-P 1 , especially to the latter, endowed the uptake for CH 3 SCH 3 reaching 88.1 mg S/g, 42% higher than that of pristine MOF-199. However, the adsorption of H 2 S by MOF-199 is chemical and the collapse of the MOF structure was observed. The hierarchical porous structure helped H 2 S access as many active sites as possible before the blockage of pores caused by the structural damage. As a result, MOF-199-P 2 achieved the optimum breakthrough capacity of 74.3 mg S/g towards H 2 S, 34 % higher than the bare MOF-199. This study provides new strategies and insights for the adsorption process between sulfide and adsorbents in different reaction modes.
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Membranes
·
2022
·Vol. 12
·期 3
·322
·
IF 4.562
Xia Sun,Ying Liu,Ruibo Xu,Yongsheng Chen
Ion exchange membranes (IEMs), as a part of the reverse electrodialysis (RED) system, play an important role in salinity gradient power (SGP) generation. Structure optimization of IEMs is critical to increase the power production by RED. In this work, metal organic framework (MOF)-derived nanoporous carbons (hollow zeolitic imidazolate framework (ZIF)-derived nanoporous carbons, HZCs) were incorporated in a sulfonated poly (2, 6-dimethyl-1,4-phenylene oxide) (sPPO) membrane to prepare an organic−inorganic nanocomposite cation exchange membrane (CEM). Physicochemical properties, electrochemical properties, and power generation of the synthesized nanocomposite membranes with different HZCs loading were characterized. The results show that the incorporated HZCs could tailor the microstructure of the membrane matrix, providing a superior performance of the nanocomposite membrane. With a HZCs loading of 1.0 wt.%, the nanocomposite membrane possessed the highest permselectivity of 77.61% and the lowest area resistance of 0.42 Ω·cm2, along with a super gross power density of 0.45 W/m2, which was 87.5% (about 1.87 times) higher than that of the blank sPPO membrane. Therefore, incorporating of an appropriate amount of HZCs in the ion-exchange membrane can improve the performance of the membrane, providing a promising method to increase the power generation of the RED system.Keywords:metal-organic framework (MOF);porous carbon;cation exchange membrane;reverse electrodialysis;salinity gradient power
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PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Guolong Lu,Hongjin Wei,Chuanqi Shen,Feng Zhou,Min Zhang,Yihuang Chen,Huile Jin,Jun Li,Guang Chen,Jichang Wang,Shun Wang
A highly stable composite electrolyte was developed in this research to address the performance decline over time in a solid lithium ion battery (SLIB). It involved the synthesis of bifunctional MOF material (MOF-2) from two different functionalized UiO-66 materials containing carboxyl groups and amine groups, respectively, and the subsequent blending of PEO (polyethylene oxide) with the MOF-2 to form the novel composite solid electrolyte (PEO-MOF-2). The composite electrolytes showed higher ionic conductivity (5.20 × 10–4 S/cm) than that of pristine PEO. The LiFePO4||Li cells constructed with PEO-MOF-2 exhibited 98.45% capacity retention with 149.92 mA h/g after 100 cycles operation at 1.0 C, which was higher than those cells prepared with pristine PEO electrolyte or with PEO-based electrolytes that were only doped by aminated MOF or carboxylated MOF. Furthermore, our experiments showed that there was about a 40% increase in the potential window (from 3.5 to 5.0 V) and 80% increase in the lithium ion transfer number (from 0.20 to 0.36 at 60 °C) as a result of replacing pristine PEO electrolyte with PEO-MOF-2.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Xuemei Zeng,Pengjie Li,Shuangqian Yan,Bi-Feng Liu
Nanomedicine that combines nanomaterials and nanotechnologies has been attracting intensive attention for tumor treatment and achieved significant advances. However, their therapeutic efficiency is still limited by the passive circulating and enrichment of the currently widely used nanomaterial carries. Instead, an active nanomaterial carrier with tumor-taxis-like behavior holds the potential to further leap tumor targeting and therapeutic efficiency. Herein, for the first time, we show that a tumor microenvironment responsive disassemblable approach, based on tumor-targeted Escherichia coli bacteria linked with degradable zeolitic imidazolate framework-8 (ZIF-8) through disulfide bond-contained polymers, can deliver multiple drugs into deep tumor tissue. The carried ZIF-8 nanoparticles will detach from the Escherichia coli via disulfide bond breakage under high concentration glutathione in tumor sites. Furthermore, the small size ZIF-8 nanoparticles can penetrate whole tumor tissue and release drug molecules (doxycycline and indocyanine green) upon pH-responsive degradation. Under light irradiation, indocyanine green generates reactive oxygen species and mild hyperthermia, realizing a photodynamic/photothermal/chemical synergistic therapy along with the doxycycline. In a mouse model, the as-prepared microbial nanohybrid accumulates and releases the therapeutics throughout the tumor tissue and shows a better tumor inhibition efficacy compared to the ZIF-8 and non-disassemblable ZIF-8/microbial platforms. Thus, this work may establish a new strategy for enhancing tumor penetration and targeting and improving treatment efficiency of nanomaterials through a tumor microenvironment responsive disassemblable microbial nanohybrid.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Yuting Zhong,Zhirui Wu,Xiaoguang Liu,Ling Li
Establishing strong interfacial interactions through novel support materials and poly-metallic alloys is an effective method to boost the catalytic performance for electrocatalytic alcohols oxidation . Herein, PdBiMn particles embedded pleated layered rGO-modified novel prismatic Al-based metal-organic framework (Al 2 (OH) 2 (H 2 O) 2 [C 10 O 8 H 2 ] or MIL-118A) composites were fabricated via a simple hydrothermal-impregnation reduction approach and employed in ethylene glycol oxidation reaction (EGOR). It is noticed that the strong electronic effects of PdBiMn alloys and the strong adsorption of oxygened species could alter the electronic structure of Pd and facilitate the removal of toxic species, while the rGO/MIL-118A strongly fixes abundant PdBiMn alloys, providing more active sites and accelerating the interfacial electron transfer . Impressively, the forward peak current density of trimetallic PdBiMn@rGO/MIL-118A catalyst is 239.62 mA cm −2 , it is almost 8.86 times greater than that of Pd/C. Additionally, after 3600 s chronoamperometry test, the current density of trimetallic catalyst retains about 75.54% of the initial current density.
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Materials Horizons
·
2022
·Vol. 9
·期 11
·2881-2892
·
IF 15.717
Qunmeng Xia,Weizheng Li,Xiuyang Zou,Sijie Zheng,Ziyang Liu,Lingling Li,Feng Yan
Ionogel-based flexible sensors are widely applied in wearable biomedical devices and soft robots. However, the abandoned ionic sensors are rapidly turning into e-waste. Here, we harness the porosity and the coordination of metal sites of metal–organic frameworks (MOFs) to develop physically crosslinked ionogels, which are composed of polymer chains that coordinate with the MOF metal sites. The covalent crosslinking of the host material transformed into reversible bond interactions that significantly enhance the mechanical properties of the MOF-ionogels. The obtained ionogels can endure an 11 000% stretch and exhibit Young's modulus and toughness of 58 MPa and 25 MJ m−3, respectively. In addition, the fracture energy is as high as 125 kJ m−2, outperforming most reported ionogels. Furthermore, the UiO-66-ionogels are fully recyclable and both the mechanical and electrical properties can be restored. The results of this work provide a new vision for the development of future “green” sensors.
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PubMed
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2022
·Vol. 26
·期 10
·2301-2313
·
IF 2.747
Liu Yunfei,Dong Shanghai,Wang Liying,Chen Guohua,Hou Yaping,Cao Zhenzhu,Zhang Yongfeng
The purplish-red rod-like crystal structure of novel bimetallic metal–organic-frameworks (MOF) {CoZn[(4,4′-BDA)(Phen)] 2 } n has been obtained by the reaction of Co 2+ , Zn 2+ (the molar ratio Co: Zn = 1:1), 1,10-phenanthroline (Phen) and 4, 4′-biphenyldicarboxylic acid (4,4′-H 2 BDA), in which Zn ions of the previously reported monometallic MOF {[Zn(4,4′-BDA)(Phen)] 2 ·(HCON(CH 3 ) 2 } n are partly substituted by Co ions. The crystal structure of {CoZn[(4,4′-BDA)(Phen)] 2 } n has been characterized by IR, X-ray photoelectron spectroscopy (XPS), and single-crystal X-ray diffraction analysis. Then, the precursors CoZn-MOF-B@C were obtained by adding a surfactant, activated carbon, and NaOH. Its derivative ZnO/CoO@C was used as anode material for lithium-ion batteries, which showed good lithium storage performance. The initial discharge specific capacity of ZnO/CoO@C is 1437.9 mAh g −1 at a current density of 0.2 A g −1 , and after 100 cycles, the specific capacity drops to 741.8 mAh g −1 .
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