INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Jie Song,Lijun Chen,Yingnan Zhou,Zhiwen Yuan,Yuhua Niu,Zhiqiang Wei
With the rapid development of industrialization, the removal of heavy metal ions and small organic molecules from wastewater has triggered a hot debate. ZIF-8 was grown on a sodium alginate backbone using an in situ growth technique, the core-shell P-SMG@ZIF-8 was synthesized. It was also characterized by FTIR, XRD, SEM, UV–Vis and XPS, and the optimal conditions and mechanism of adsorption were explored. At pH 2.0, a contact time of 200 min, and 298 K, removal of Cu(II) and Ph up to 80.2 %, 65.6 % by P-SMG@ZIF-8, adsorption behavior consistent with Langmuir model for pseudo-secondary rates, the saturated adsorption of Cu(II) and Ph could reach up to 83.5812 mg/g and 78.1779 mg/g, respectively. And the adsorbed P-SMG@ZIF-8 is easy to separate and reusable, which is a cost-effective and efficient natural product-based adsorption material.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Chunxin Jin,Shuai Liu,Rui Zheng,Yanhong Li,Xiaofang Chen,Jürgen Caro,Jianwen Jiang,Aisheng Huang
Metal-organic framework (MOF) membranes have showed great potential in gas separation. To date, it is still a great challenge to precisely control the optimal orientation of MOF membranes with an enhanced gas separation performance. Herein, we prepared a compact and (110) oriented ZIF-8 membrane with a thickness of about 265 nm on graphite substrate within 1 h at room temperature via electric-field-driven strategy. Since the membrane is an intergrown one-crystal layer, grain boundary retardation of the flux is eliminated. Furthermore, due to the reduction of the transport pathways through the oriented structure, the (110) oriented ZIF-8 membrane exhibits a high gas separation performance. At 100 °C and 1 bar for the separation of equimolar binary gas mixtures H 2 /CO 2 , H 2 /CH 4 and H 2 /C 3 H 8 , separation factors of 49.5, 90.9 and 121.8 can be obtained, with H 2 permeance of about 1.7 × 10 -7 mol·m −2 ·s −1 ·Pa −1 . The developed strategy exhibits excellent reproducibility and scalability, and a large area ZIF-8 membrane can be consistently prepared on the graphite substrate, thus facilitating the preparation and application of the ZIF-8 membrane on a large scale. Further, the electric-field-driven strategy is also helpful for the preparation oriented ZIF-67 and ZIF-L membranes, confirming its versatility for the preparation of oriented MOF membranes.
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RENEWABLE ENERGY
·
2024
·
IF 9
Shuaibo Xia,Cai Shen,Jiale Lin,Maolin Tu,Chin-Ping Tan,Ling-Zhi Cheong
The absorption process of Aspergillus oryzae lipase (AOL) onto the surface of ZIF-8 was elucidated using molecular dynamic (MD) simulation. AOL are absorbed onto the surface of ZIF-8 via hydrogen bonding, electrostatic and van der Waals interaction with minimal changes to its native configurations. Unlike free AOL, AOL@ZIF-8 can maintain its structure in simulated methanol solutions. To verify the results from MD simulation, AOL was immobilized onto ZIF-8 (AOL@ZIF-8: immobilization efficiency of 64.71 % and a protein loading of 57.36 mg/g) and characterized using SEM, FTIR, and XRD. As compared to free AOL, AOL@ZIF-8 demonstrated higher transesterification activity with an activity recovery of 106.18 %. In agreement with MD simulations, AOL@ZIF-8 exhibited enhanced stability in wide range of pH and under presence of alcohol solution. AOL@ZIF-8 can be used to catalyze transesterification of used cooking oil for production of biodiesel (FAME content of 81.19 %).
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Menghui Wan,Yuting Zhang,Tao Hong,Junyan Cui,Yanbao Zhao,Zhihua Wang
The development of novel intelligent pesticide formulations for enhanced foliage deposition and efficient utilization remains a challenge. Accropode stones are general employed to attenuate the impact of waves. Herein, we constructed novel accropode-like carriers based on zeolitic imidazolate framework-8 (ZIF-8) and silica (SiO 2 ) for pesticide delivery with enhanced foliar affinity. Firstly, β-cyclodextrin-doped ZIF-8 (β-CD/ZIF-8) carrier was prepared by a one-pot method. Subsequently, a selective occupation strategy was applied to achieve facet-specific growth of mesoporous SiO 2 on β-CD/ZIF-8 (β-CD/ZIF-8@S). The β-CD/ZIF-8@S nanocarriers exhibited regular structure with sixteen facets. The accropode-like structure would achieve effective foliage retention and resistance to rainwater washout by the reduction of carrier bouncing and rolling on foliage. The β-CD/ZIF-8@S presented a high loading efficacy for imidacloprid (IMI) (24.43 %) and good biocompatibility. After loading IMI, tannic acid (TA) was utilized to block the loaded pesticide (IMI@β-CD/ZIF-8@ST). The IMI@β-CD/ZIF-8@ST exhibited dual responsive release behavior and could be effectively transported in both directions in various parts of tobacco plants. The photostability of IMI@β-CD/ZIF-8@ST was 5-times that of IMI solution. Moreover, the insecticidal efficacy against Plutella xylostella of IMI@β-CD/ZIF-8@ST was 80 % after 120 h of UV irradiation, while that of IMI and IMI water dispersible granule was only 23.33 % and 26.67 %, respectively. This work provides new insights into enhancing the foliage retention and efficiency utilization of pesticide.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Tenglong Jin,Wenmiao Chen,Hongyan Zhuo,Wenjuan Li,Zhen Fu,Linlin Feng,Yanli Chen
The development of efficient and facile nonprecious metal catalysts for the oxygen reduction reaction (ORR) holds great significance. Among these, the single-atomic metal–nitrogen–carbon (M–N–C) catalysts are emerging candidates due to their high activity and prolonged lifespan. However, traditional preparation of M–N–C catalysts suffers from thermal aggregation and low space–time yield, limiting their application in industry. Inspired by the “chainmail protection” in carbonaceous materials, here we propose an “armor protection” strategy for the large-scale synthesis of a highly active Fe single-atom ORR catalyst (Fe-8/8-CN) by pyrolyzing a well-designed precursor Fe-ZIF-8/ZIF-8. In this precursor, the 2-methylimidazole zinc MOF (ZIF-8) loaded with iron (Fe-ZIF-8) is encased in an additional ZIF-8 armor layer (Fe-ZIF-8/ZIF-8) that effectively shields the aggregation of Fe species within the inner ZIF-8 during the pyrolysis process, ultimately yielding the Fe single-atom ORR catalyst (Fe-8/8-CN). Furthermore, the facile approaches for the construction of Fe-ZIF-8/ZIF-8 make it efficiently scale up with a high space–time yield of 18.7 kg m–3 day–1. In particular, the armor protection strategy for preparing the Fe single-atom catalyst is universally applicable to leaf-shaped ZIF-L and other ZIFs with diverse morphologies. Thanks to the presence of the outer ZIF-8 layer and the inner ZIF-8 core to dispersing Fe single-atom catalytic sites with the porous and defect-rich characteristics from the volatilization of Zn in ZIF-8, the resulting Fe-8/8-CN demonstrates superior ORR performance in alkaline electrolyte (E1/2 = 0.93 V, JL = −5.89 mA cm–2). Finally, Fe-8/8-CN, as the cathode material for flexible zinc–air batteries, exhibits a high peak power density (97 mW cm–2) and excellent durability superior to Pt/C.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Shuqi Zhang,Jing Yi,Xuanxuan Yuan,Zhilong Zhang,Zhongguo Shan,Haihua Wang
The development of environmentally friendly biodegradable films is urgently required for reducing the plastic pollution crisis and ensuring food safety. Thus, here we aimed to prepare ZIF-8 that has delivery ability for gallic acid (GA) and further incorporated this material (GA@ZIF-8) into carrageenan (CA) matrix to obtain a series of CA-GA@ZIF-8 films. This design significantly improved the mechanical strength and UV barrier and reduced water vapor permeability, moisture content , and swelling rate of the CA films. CA-GA@ZIF-8 films exhibited sustainable release of GA and controlled migration of Zn 2+ up to 144 h in a high-fat food simulator. Also, the composite films performed high-efficiency antioxidant activities (83.29 % for DPPH and 62.11 % for ABTS radical scavenging activity) and 99.51 % antimicrobial effects against Escherichia coli O157:H7 after 24 h. The great biocompatibility of GA@ZIF-8 and CA-GA@ZIF-8-10 % was confirmed by hemolysis, cell cytotoxicity, and mice model. Finally, the preservation experiments showed that CA-GA@ZIF-8 films could effectively maintain freshness and reduce the growth of microorganisms and oxidation of lipids during the preservation of beef. These results suggest that CA-GA@ZIF-8 films hold promising potential for improving the quality preservation of beef.
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PLoS One
·
2024
·Vol. 19
·期 10
·e0311239
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IF 2.9
Zhijia Miao,Xueqiang Song,Xiaolei Wang,Hao Wang,Shuoyang Li,Zhen Jiao
To remove phosphate from water, a novel Fe-doped ZIF-8 was synthesized as a superior adsorbent. The Fe-doped ZIF-8 was fully characterized using different characterization techniques and it was found that the as-prepared Fe-doped ZIF-8 (denoted as ZIF-(2Zn:1Fe)) showed a polyhedral morphology with a large specific surface area of 157.64 m 2 /g and an average pore size of 3.055 nm. Analyses using Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction showed that Fe atoms were successfully incorporated into the ZIF-8 skeleton. Batch experiments demonstrated that the molar ratio of Fe and Zn has effects on phosphate adsorption. The adsorption kinetics conformed to a pseudo-second-order model with a high correlation coefficient ( R 2 = 0.9983). The adsorption isotherm matched the Langmuir model ( R 2 = 0.9994) better than the Freundlich model ( R 2 = 0.7501), suggesting that the adsorption of phosphoric acid by ZIF-(2Zn:1Fe) can be classified as a chemisorption on a homogeneous surface. The adsorption amount was 38.60 mg/g. It was found that acidic environments favored the adsorption reaction and the best adsorption was achieved at an initial pH of 2. Inhibition of adsorption by common anions is NO 3 - > CO 3 2- > SO 4 2- > Cl - . Characterization results indicate that the main mechanism of adsorption is surface complexation interactions.
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MOLECULES
·
2024
·Vol. 29
·期 8
·1703
·
IF 4.2
Meihua Liang,Yong Yan,Jiaxuan Yang,Xiaodong Liu,Rongrong Jia,Yuanyuan Ge,Zhili Li,Lei Huang
Microelectromechanical systems (MEMS) gas sensors have numerous advantages such as compact size, low power consumption, ease of integration, etc., while encountering challenges in sensitivity and high resistance because of their low sintering temperature. This work utilizes the in situ growth of Zeolitic Imidazolate Framework-8 (ZIF-8) followed by its conversion to N-doped ZnO. The results obtained from scanning electron microscopy (SEM) and transmission electron microscopy (TEM) indicate that the in situ derivation of ZIF-8 facilitates the adhesion of ZnO particles, forming an island-like structure and significantly reducing the interfaces between these particles. Furthermore, powder X-ray diffraction (XRD) analysis, elemental mapping, and X-ray photoelectron spectroscopy (XPS) analysis confirm the conversion of ZIF-8 to ZnO, the successful incorporation of N atoms into the ZnO lattice, and the creation of more oxygen vacancies. The ZIF-8-derived N-doped ZnO/MEMS sensor (ZIF (3)-ZnO/MEMS) exhibits remarkable gas sensitivity for ethanol detection. At an operating temperature of 290 °C, it delivers a substantial response value of 80 towards 25 ppm ethanol, a 13-fold enhancement compared with pristine ZnO/MEMS sensors. The sensor also exhibits an ultra-low theoretical detection limit of 11.5 ppb to ethanol, showcasing its excellent selectivity. The enhanced performance is attributed to the incorporation of N-doped ZnO, which generates abundant oxygen vacancies on the sensor’s surface, leading to enhanced interaction with ethanol molecules. Additionally, a substantial two-order-of-magnitude decrease in the resistance of the gas-sensitive film is observed. Overall, this study provides valuable insights into the design and fabrication strategies applicable to high-performance MEMS gas sensors in a broader range of gas sensing.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xiaotong Zhang,Yanxin Wang,Wei Xing,Leixuan Li,Huiyi Wu,Hanwen Wang,Zilong Wang,Linjun Huang,Jianguo Tang
Bacterial infections and excessive accumulation of wound exudates remain the main obstacles and clinical challenges to the healing of chronic cutaneous wounds. Conventional dressings are commonly used medical materials for acute wound care, but they do not possess the bacterial infection resistance required for chronic wound treatment. Herein, we prepared pure chitosan nanofibrous membranes (C) by electrospinning with poly(ethylene oxide) (PEO) as a sacrificial additive and then loaded with zinc-based metal-organic framework (MOF) as a novel antimicrobial wound dressing. Thermogravimetric and differential scanning calorimetry confirmed the complete removal of PEO. Morphological characterization of the nanofibrous membrane (C) revealed the formation of uniform, bead-free fibers with an average diameter of approximately 148 nm. SEM confirmed the uniform and continuous modification of zeolite imidazolium salt framework-8 (ZIF-8) nanoparticles on the surface of the composite fibrous membrane (C/ZIF). The experimental results showed that the removal of PEO and the incorporation of ZIF-8 significantly improved the rapid liquid absorption of the composite fiber membrane. Rapid uptake of up to 9.2 g/g of liquid in media of the characteristic pH of wound exudates. The results of the MTT assays demonstrated that the C/ZIF composite fiber membrane possesses excellent biocompatibility. The composite fiber membrane released Zn 2+ in a stable and continuous manner and exhibited strong antimicrobial activity against Escherichia coli and Staphylococcus aureus . This study presents a novel approach for controlling wound exudation and preventing wound infections.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Shuai Zhang,Jincheng Xiong,Boyan Sun,Chunchao Yin,Yongjun Zheng,Xingxing Liu,Yanchen Gao,Xiaomei Wang,Sihan Wang,Haiyang Jiang
Emerging contaminants seriously jeopardize food safety and even human health. This study presents the formation of all-in-one aggregation-induced emission (AlE)-type immunomagnetic ZlF-8 (AlMZ) through an ultra-simple self-assembly method in an aqueous phase, successfully harnessing the functions of immuno-recognition, luminescence, and magnetism, Here, we have achieved a dual enhancement in detection efficiency rapidly enriching targets and performing a triple lateral flow immunoassay (LFlA) for ractopamine, diethylstilbestrol, and chloramphenicol within 40 minutes, The dual readout biosensor was then configured to automatically extract the color intensity values of the three test lines using a smartphone. A portable sensing platform ensures stable temperature and light intensity in non-laboratory environments, providing favorable conditions for immunological detection. This study demonstrated low detection limits of 0.11, 0.14, and 0.01ug/L for ractopamine, diethylstilbestrol, and chloramphenicol, respectively, Applications in pork and tap water showed excellent practicality and stability, with recovery rates ranging from 87.2 % to 112.7 %, emphasizing the potential for applications in food and environmental safety.
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Journal of Inorganic and Organometallic Polymers and Materials
·
2025
·
IF 4.9
Liu Li,Lai Dengwang,Cao Wuyan,Bao Zanjuan,Zhao Tian,Wang Chunhua,Liu Yuejun,Yang Jun
This study synthesized zeolitic imidazolate framework (ZIF-8) using a solvothermal method and employed mechanical stirring to coat basic magnesium hypochlorite (BMH) onto the surface of ZIF-8, thus preparing antibacterial microspheres of BMH/ZIF-8. Escherichia coli ( E. coli ) was used as the model bacterium, the effect of BMH concentration on the antibacterial effect of BMH/ZIF-8 was explored, and the optimal BMH concentration was determined to be 100 µg/mL. The antibacterial rate was 73% for BMH, 20% for ZIF-8, and 100% for BMH/ZIF-8, as determined by the plate counting method. In addition, the synergistic effect factor (SEF) determination method calculated SEF > 0. This shows that BMH and ZIF-8 had a synergistic antibacterial effect. Important techniques such as Scanning Electron Microscope (SEM), Brunauer-Emmett-Teller (BET), and X-ray Diffraction (XRD) analysis were employed to investigate the synergistic antibacterial mechanism of BMH and ZIF-8. The mechanism is that porous ZIF-8 with ultra-large specific surface area cooperates with BMH to antibacterial. This synergistic effect allows BMH sheets to be adsorbed on the surface of ZIF-8, greatly increasing the contact area between the antibacterial agent BMH and bacteria. Additionally, BMH adsorbed on the surface of ZIF-8 can also serve as surface protection, thus delaying the breakage of Zn-N coordination bonds within ZIF-8. Consequently, as BMH on the surface of ZIF-8 is gradually consumed, the Zn-N coordination bonds undergo breakage, leading to slow release of internal Zn 2+ and 2-methylimidazole organic ligands. Zn 2+ possesses oxidizing properties, enabling it to bind with bacteria and disrupt their protein structures. Meanwhile, 2-Methylimidazole can undergo degradation, resulting in the generation of reactive oxygen species (ROS). The hydrophobic methyl group of 2-Methylimidazole is also able to compromise the integrity of bacterial membranes and impede the activity of key enzymes by means of chelating metal ions. Collectively, these mechanisms, in conjunction with ROS, establish a multifaceted antimicrobial network, thereby engendering a favorable antimicrobial effect.
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JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Yang Xiang,Zan Liu,Zhi-lin Cheng
The metal organic framework (MOFs)-derived porous carbon materials with highly dispersed metal active sites were of the exclusive application foreground in many field, such as catalyst, electrochemistry, adsorption desulfurization and so on. However, the loss issue of metal active sites in MOFs frame was indispensable during the high temperature carbonization because of the lower boiling point of many metals, thus fundamentally affecting the atom-scale uniform distribution merit of MOFs-derived porous carbon materials. This work was to provide a novel strategy to address the loss issue of the active metal volatilization in the fabrication of MOFs-derived porous carbon materials. The ZnO nanosheets were pre-grown on the surface of diatomite by using in-situ microwave-assisted preparation, and thereafter the Zn-containing ZIF-8 particles covered the surface of ZnO nanosheets by virtue of the ZnO-induced growth. The results affirmed that the high content Zn-doped porous carbon materials were achieved and the Zn volatilization in MOFs was restrained on account of the occurrence of ZnO on diatomite (DE) surface during the carbonization. The adsorption desulfurization performance of the ZnO/Zn-embedded porous carbon materials/DE (ZnO/Zn/C@DE) was examined by the sulfur-containing compounds in simulated oil. The adsorption desulfurization performance investigation indicated that the ZnO/Zn/C@DE had the optimum adsorption capacities of 45.3 mg/g for benzothiophene and 37.4 mg/g for thiophene. Nonetheless, the competitive adsorption desulfurization finding of toluene in simulated oil showed that the adsorption capacities of ZnO/Zn/C@DE for TH and BT were dramatically descended, suggesting the presence of S-M interaction, wherein S stood for the S atom in a thiophene molecule and their analogs, and M for Zn atoms in porous carbon materials.
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