RSC Advances
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2018
·Vol. 8
·期 13
·6887-6892
·
IF 2.936
Shanshan Li,Dongyan Li,Long Sun,Yuewei Yao,Cheng Yao
We fabricated a novel aminophenylboronic acid functionalized magnetic Fe3O4/zeolitic imidazolate framework-8/APBA (denoted as Fe3O4/ZIF-8/APBA). First, Fe3O4 was coated by zeolitic imidazolate framework-8 (denoted as Fe3O4/ZIF-8) using the hydrothermal method. Next, the phenylboronic acid functionalized triethoxysilane reagent was synthesized by 3-aminophenylboronic acid and 3-isocyanatopropyltriethoxysilane, which was modified on the surface of the Fe3O4/ZIF-8 nanocomposite through the sol–gel technique and electrostatic interaction as well as π–π stacking interaction. The synthetic Fe3O4/ZIF-8/APBA exhibited high adsorption capacity and good specificity toward glycoproteins. Moreover, the Fe3O4/ZIF-8/APBA possessed high saturation magnetization (51.41 emu g−1) and achieved better separation in the presence of an external magnetic field. Above all, the as-designed Fe3O4/ZIF-8/APBA was successfully used to capture glycoproteins and identify the horseradish peroxidase (HRP) tryptic digest. This study provides a facile strategy to embellish the aminophenylboronic acid onto the nanocomposite substrate and develop a new material for the specific recognition and enrichment of glycoproteins and low-abundance glycopeptides in proteomics research.
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高影响因子
Catalysts
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2018
·Vol. 8
·期 3
·96
·
IF 3.465
Miaad Adnan,Kai Li,Li Xu,Yunjun Yan
This study presents a one-step encapsulation method for synthesizing X-shaped zeolitic imidazolate frameworks (ZIF-8) and immobilizingRhizomucor mieheilipase (RML). We proved that the morphological structure of ZIF-8 had changed after immobilization with enhanced characterization using a field-emission scanning electron microscope, an energy-dispersive spectrometer, a transmission electron microscope, a Fourier transform infrared spectrometer, and powder X-ray diffraction. The surface area and pore size of the carrier were investigated before and after immobilization using Brunauer–Emmett–Teller and Barrett–Joyner–Halenda methods, respectively. RML@ZIF-8 exhibited high recovery activity of up to 2632%, representing a 26-fold increase in its free lipase. Encapsulated RML was used for biodiesel production from soybean oil in an isooctane system with a conversion yield of 95.6% under optimum conditions. The resulting reusability of the immobilized enzyme indicated no substantial decline in the conversion yield, which remained at 84.7% of the initial activity after 10 cycles. The stability and high performance of the immobilized enzyme are attributed to the harmony between RML and ZIF-8 based on the easy synthesis of ZIF-8 and the short time required to immobilize RML.Keywords:X-shape ZIF-8;Rhizomucor mieheilipase (RML);encapsulation technique;biodiesel yield;soybean oil
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ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Qianqian Zhu,Wei Zhuang,Yong Chen,Zhanke Wang,Byron Villacorta Hernandez,Jinglan Wu,Pengpeng Yang,Dong Liu,Chenjie Zhu,Hanjie Ying,Zhonghua Zhu
To improve the stability and recyclability of enzymes immobilized on metal-organic frameworks (MOFs), graphene oxide (GO) with surface oxygen-rich functional groups was selected to form ZIF-8/GO nanocomposites with the zeolitic imidazolate framework (ZIF-8) for cytochrome c (Cyt c) immobilization. It was found that the functional groups on the GO surface were involved in the growth of ZIF-8 without affecting the crystal structure but their particle size was reduced to about 200 nm. The storage stability and resistance to organic solvents of Cyt c were obviously improved after the immobilization on the ZIF-8/GO nanocomposite. On one hand, compared with Cyt c@ZIF-8 and Cyt c@GO with 30 and 60% protein leakage, Cyt c@ZIF-8/GO displayed little protein leakage after 60 h of storage. On the other hand, Cyt c@ZIF-8/GO retained a residual activity of approximately 100% after being stored in ethanol and acetone for 2 h, whereas the free enzyme, Cyt c@ZIF-8, and Cyt c@GO retained only about 10, 50, and 40%, respectively. In addition, the Cyt c@ZIF-8/GO nanocomposites can be utilized up to four cycles with virtually no loss of activity and may be further applied on H2O2 biosensing systems. The synergistic effect between MOFs and GO in ZIF-8/GO nanocomposites provides infinite possibilities as immobilized enzyme carriers.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Yuanyuan Rao,Fang Ni,Yun Sun,Benwei Zhu,Zhi Zhou,Zhong Yao
Uniform zeolitic imidazolate framework (ZIF-8) nanoparticles were synthesized then dispersed into a rubbery polydimethylsiloxane (PDMS) matrix to prepare ZIF-8/PDMS hybrid membranes. The performance of the ZIF-8/PDMS hybrid membrane was evaluated in ethanol-water and aromatic-water model systems. The ZIF-8/PDMS hybrid membranes, loaded with 6 wt% of the nanoparticles, separated of ethanol and the characteristic compounds in blackberry juice, linalool, benzaldehyde and ethyl acetate more effectively than a pure PDMS membrane. Based on these results, a ZIF-8/PDMS hybrid membrane was used to separate the volatile aromatic compounds (VACs) from natural blackberry juice. The total volatile aromatic compounds in the blackberry juice decreased significantly after pervaporation treatment. The recovery of linalool, benzaldehyde and ethyl acetate at 50 °C were 93.8%, 92.1% and 75.2%, confirming the high performance of ZIF-8/PDMS hybrid membrane.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Hao Guo,Taotao Sun,Liguo Yue,Ning Wu,Qi Li,Wenqing Yao,Wenhu Yang,Wu Yang
As a kind of energy storage device, supercapacitors have attracted the attention of researchers, and the development of high-performance electrode materials is also the focus of attention. In this paper, template synthesis and pyrolysis were combined to prepare high performance porous carbon electrode materials. The carbonized electrode material effectively increased the capacitance storage capacity and charge transfer rate. The results revealed that the derivative had a relatively low charge-transfer resistance and high specific capacitance of 1059 F·g −1 at a current density of 1.0 A·g −1 in a three-electrode system. To further exploring practical application, a device based on the derivative and hemp-activated carbon asymmetric supercapacitor was assembled in 0.1 M Na 2 SO 4 neutral electrolyte, which exhibited an energy density of 20.35 Wh·kg −1 at a power density of 400 W·kg −1 . Interestingly, it showed capability retention of nearly of 91.7% and columbic efficiency of 100% even after 10000 charging/discharging cycles in the neutral electrolyte.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Mei Lin,Jianwang Wu,Zuliang Chen
Due to the wide variety of pollutants in wastewater, therefore, how to efficiently and effectively remove mixed pollutants is of great importance for environmental remediation. In this study, ZIF-67 hollow prisms self-assembled by nanoparticles were prepared. The nanoparticles possess a regular distributed pore structure, which mixed with the self-assembled hierarchical structure can provide more binding sites. This special self-assembly structure endows ZIF-67 hollow prisms to have a large specific surface area (1221 m 2 /g), and to exhibit excellent efficiency in removing a variety of pharmaceuticals. For simultaneous removal of ciprofloxacin and Pb(II) mixed pollutants, the adsorption process of Pb(II) is ultra-fast (<2 min), and the average amount removed efficiently was 100 %. The maximum adsorption capacities of ciprofloxacin (CIP) and Pb(II) were 1586.14 and 2488.14 mg g −1 , respectively. The XPS results indicated that Pb(II) may be mixed with Co-OH to form Co-O-Pb during the adsorption process. As well, metal ions are easily complexed with antibiotics, which makes the adsorption performance of CIP and Pb remarkable. This study explored the adsorption capacity by porous materials with self-assembled structures, and provided a novel strategy for the efficient removal of antibiotic/heavy metal complex pollutants from the environment.
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NANOTECHNOLOGY
·
2024
·Vol. 35
·期 23
·235601
·
IF 2.9
Miao Tang,Jintao Sun,Huang Naibao,Bin Wang,Xiaowen Ge,Wenjing Dong,Wanting Li,Xiannian Sun
Efficient and robust oxygen reduction reaction (ORR) catalysts are essential for the development of high-performance anion-exchange membrane fuel cells (AEMFC). To enhance the electrochemical performance of metal–organic frameworks of cobalt-based zeolite imidazolium skeleton (ZIF-67), this study reported a novel ZIF-67-4@CNT by in situ growing carbon nanotubes (CNTs) on the surface of ZIF-67 via a mild two-step pyrolysis/oxidation treatment. The electrochemical results showed that the as-prepared ZIF-67-4@CNT after CTAB modification exhibited excellent catalytic activity with good stability, with Eonset, E1/2, and Ilimit, respectively were 0.98 V (versus RHE), 0.87 V (versus RHE) and 6.04 mA cm−2@1600 rpm, and a current retention rate of about 94.21% after polarized at 0.80 V for 10 000 s, which were all superior to that of the commercial 20 wt% Pt/C. The excellent ORR catalytic performance was mainly attributed to the large amount of the in situ growing CNTs on the surface, encapsulated with a wide range of valence states of metallic cobalt.
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RSC Advances
·
2024
·Vol. 14
·期 7
·4861-4870
·
IF 3.9
Yibo Zhao,Yueyang Li,Lu Chang,Wenjing He,Keling Liu,Minjie Cui,Shengnan Wang,Yujia Zhao,Xinyu Tan
Bimetal doped Cu–Fe-zeolitic imidazole framework-8 (ZIF-8)/graphitic carbon nitride (GCN) (Cu–Fe-ZIF-8/GCN) nanocomposites were prepared via one-pot and ion-exchange methods. The main influencing factors, such as adsorbent concentration, TC concentration, initial pH, and coexisting ions, were evaluated in detail. Due to the suitable pore structures and the presence of multiple interactions on the surface, the nanocomposite showed a high adsorption capacity up to 932 mg g−1 for tetracycline hydrochloride (TC), outperforming ZIF-8 by 4.8 times. The adsorption kinetics and adsorption isotherm were depicted in good detail using pseudo-second-order kinetic and Langmuir models, respectively. Thermodynamic calculation revealed that the adsorption of the nanocomposite under experimental conditions was a spontaneous heat absorption process, and was primarily driven by chemisorption. After four cycles of use, the nanocomposite retained 87.2% of its initial adsorption capacity, confirming its high reusability and broad application prospects in removing tetracycline-type pollutants from wastewater.
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高影响因子
Nano Today
·
2024
·
IF 13.2
Zhihao Lin,Guangyang Liu,Bin Sheng,Yiming Zhao,Dan Xu,Zhijian Wu,Jie Zhou,Meng Zhang,Ge Chen,Jing Wang,Jun Lv,Huan Lin,Donghui Xu
Nanoplastics, as a novel pollutant, are widely found in the environment and water, which also can be migrated to vegetables and fruits through irrigation water and the growing process, posing threat to the human health. In this study, post-modification strategy was implemented to synthesize a series of fine-tuning hierarchically porous ZIF-derived nanoframework (Zn-Co-Ni-ZIF, Zn-Co-TA-ZIF and ZIF67-Ni-ZIF) with various morphologies and structures to investigate the relationship between the polystyrene nanoplastics (PS-NPs) adsorption performance and structure property. The correlation degree between PS-NPs adsorption property and structure parameter followed the order of the intensity of Co2p > the intensity of M-N > the number of linker deficiencies > crystal defect > zeta potential. The gray models (GM) (1,1) between adsorption capacity and evaluation items were successfully established (C < 0.342; RSD < 18.108 %) but zeta potential. A highly linked association (R 2 = 0.9561) between the PV meso /PV micro and equilibrium constants k t 2 may be discovered. The combined findings from experimental analysis and Density Functional Theory calculations demonstrated that the adsorption capacity of adsorbents for PS-NPs was greatly enhanced by the introduction of additional defects and the reinforcement of adsorbent-adsorbate interactions, including electrostatic and coordination interactions. Among the selected materials, Zn-Co-ZIF and Zn-Co-Ni-(60 mg)-ZIF exhibited better resistance to acid, alkali, and salt. Moreover, the PS-NPs removal efficiency of Zn-Co-ZIF and Zn-Co-Ni(60 mg)-ZIF were > 83.55 % and > 87.80 %, respectively, in irrigation water, watermelon, strawberry, and carrot, meeting the environmental and food safety. Therefore, this work provides valuable insights into the modification of MOFs to improve the elimination of micropollutants in water, fruit, vegetable, as well as a comprehensive comprehension of the correlations between structure and performance.
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FOOD CONTROL
·
2024
·
IF 5.6
Xiaowei Chen,Yujun Feng,Yuanyuan Wang,Xin Yang,Xingping Zhang,Hualin Yang,Yu Zhou
With the gradual increase of oxytetracycline (OTC) residue in the environment, it is particularly important to establish a sensitive and efficient method to detect OTC. In this work, a novel colorimetric and fluorescence dual-mode detection method based on hemin/G-quadruplex (hemin/G4) DNAzyme and zeolitic imidazolate framework-8 (ZIF-8) is developed. OTC can compete with G4 to bind hemin to reduce the amount of hemin/G4. Thus, the oxidation of 3, 3′, 5, 5′-tetramethylbenzidine (TMB) to blue color by hemin/G4 is inhibited. In addition, the OTC or OTC-hemin can be aggregated with the help of ZIF-8 to produce strong green fluorescence due to the aggregation-induced emission (AIE) effect. In colorimetric and fluorescence mode, the linear ranges of the new method are 0.375–18 μM and 0–52.5 μM, with a limit of detection (LOD) of 0.116 μM and 0.040 μM, respectively. Besides, this new method has a good selectivity and recovery rate in the detection of real samples. Therefore, the method can be used for the efficient and sensitive detection of OTC.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2024
·Vol. 171
·期 4
·047514
·
IF 3.1
Xuemei Ma,Wanyu Pang,Yali Gao,Xile Chang,Zhiyong Hu,Tuoping Hu
Rapid and accurate determination of rutin content in pharmaceuticals in an important issue. Here, a paper-based electrochemical sensor for in situ growth of chain ZIF-8 using multi-walled carbon nanotubes (MWCNTs) as a template was constructed by hydrothermal method. The results showed that the combination of ZIF-8 and MWCNTs not only promoted the dispersion of MWCNTs, but also made up for the conductivity of ZIF-8. Under optimum conditions, the Ipa was linearly related to the concentration of rutin in the range of 0.01–10 and 10–190 μM with a limit of detection (LOD) of 2.82 nM. Finally, the paper-based electrochemical sensor can be used for the electrochemical detection of rutin through the determination of rutin in pharmaceuticals.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Shibo Sun,Wenzi Huang,Huajuan Yu,Zhihao Sun,Wei Shang,Yuqing Wen
The magnesium (Mg) metal anodes of magnesium batteries have attracted significant attention because of their high theoretical capacity, high safety, and low cost. Their development is hindered by the passivation characteristics of magnesium, especially the serious voltage lag and corrosion polarization in aqueous solutions. This study demonstrates a novel approach involving the electrophoresis deposition on the surface of a magnesium electrode with MXene@ZIF-67. MXene@ZIF-67 is a heterojunction material with a core-shell structure obtained from MXene and ZIF-67 by the in-situ growth method. The addition of ZIF-67 not only solves the problem of MXene layer-to-layer instability, but also improves the corrosion resistance of magnesium metal by utilizing the properties of ZIF-67 material topology. The core-shell structure design of the modified film layer enables MXene and ZIF-67 to achieve efficient synergy. On the one hand, the unique lamellar structure of MXene is utilized to achieve uniform Mg 2 + flux and reduce the interfacial resistance of the magnesium anode, and on the other hand, the unique ionic conductor performance of ZIF-67 enables precise separation of solvent molecules and simultaneous selective Mg 2+ transport. So, the film is beneficial for interfacial stability and reaction kinetics. The modified Mg battery exhibits a reduction in voltage lag time from 7.2 seconds to 1.3 seconds. A notable reduction in polarity and enhanced stability in plating and stripping was observed in magnesium metal battery for 300 cycles. The DFT calculations show that there is a high adsorption energy between the MXene@ZIF-67 film and the magnesium alloy.
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