MOLECULES
·
2024
·Vol. 29
·期 14
·3395
·
IF 4.2
Ping Wei,Boyao Xie,Jiang Wang,Yanjun Wu,Qi Shi,Jinxiang Dong
Few studies have reported on the continuous evolution of dual-linker zeolitic imidazolate frameworks’ (ZIFs) structure and morphology during the crystal growth process. Herein, we report the synthesis of a novel ZIF material with CHA topology (ZIF-301-eIm) via the combination of a small-sized 2-ethylimidazole (eIm) with the large-sized 5-chlorobenzimidazole ligand. A series of derivative materials with distinct structures and morphologies were obtained via two pathways: (1) insufficient amount of eIm with prolonged crystallization time (pathway A) and (2) sufficient amount of eIm with prolonged crystallization time (pathway B). Various characterization techniques revealed the continuous evolution of structure and morphology during the crystal growth process. Insufficient amount of eIm and crystallization time (crystallization pathway A) led to ZIF-301-eIm derivatives with defective and open structures alongside an aggregated morphology of nanoparticles. Prolonging the crystallization time allowed small-sized eIm ligands to gradually fill into the framework, resulting in the formation of ZIF-301-eIm-A5 characterized by complete but dense structures with a perfect polyhedral morphology. Remarkably, a sufficient amount of eIm during synthesis (crystallization pathway B) formed ZIF-301-eIm-B1 with a similar structure and morphology to ZIF-301-eIm-A5 in just 1 day. ZIF-301-eIm-B3, with intact, dense structures, exhibits superior acetone/butanol separation performance compared to ZIF-301-eIm-A3 due to small pore windows and large cages facilitating selective adsorption of acetone through exclusion separation.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 20
·205402
·
IF 3.953
Tianyang Li,Zhikun Xu,Shuangyan Lin
Rational design and controllable synthesis of metal-organic frameworks nanosheets is critical for electrochemical catalysis. Herein, a carnation-like ZIF-9 nanostructure made of nanosheets is grown on nickel foam (ZIF-9/NF) by a simple one-step solvothermal method, the morphology evolution and the electrocatalytic oxygen evolution properties have been investigated by controlling the solvothermal time. The binder-free ZIF-9-d/NF (60 h, solvothermal time is 60 h) electrode delivers efficient electrocatalytic oxygen evolution reaction activity with low overpotentials of 312 and 337 mV at 50 and 100 mA cm−2, respectively. Furthermore, ZIF-9-d/NF (60 h) exhibits excellent stability without obvious attenuation for at least 30 h at 200 mA cm−2. The excellent performances can be attributed to the combination of the highly exposed active sites in the ZIF-9-d nanosheets, as well as the effective electron conduction and mass transfer. This work provides much possibilities for ZIF-9 nanosheets as binder-free electrode for electrocatalyst.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 3.8
Linsong Luo,Xiao Han,Xiaoyan Dong,Qinghong Shi,Yan Sun
The growth of biodiesel and oleochemical industries results in substantial surpluses of glycerol and consistently low prices. To absorb this surplus, we report a polymer-assisted in situ enzymes encapsulation strategy in which glycerol dehydrogenase (GDH) is encapsulated with polyvinylpyrrolidone (PVP) and cysteine (Cys) within ZIF-8 for glycerol conversion. The results showed that the encapsulated GDH/ZIF-8 composites presented stronger substrate affinities and higher catalytic efficiencies than free GDH as well as good stability. Among the free GDH and GDH/ZIF-8 composites, GDH/Cys/PVP@ZIF-8 presented the highest relative activity of 300.7 %. This could be attributed to the structural evolution of the encapsulated GDH and the formation of a more hydrophilic microenvironment around GDH during complexation with PVP. To increase cofactor utilization, a cofactor self-sufficient cascade system was constructed by encapsulating GDH and forming H 2 O NADH oxidase (Nox) with PVP and Cys within ZIF-8 for the conversion of glycerol to 1,3-dihydroxyacetone (DHA). At the optimal GDH:Nox molar ratio (4:1) and a substrate concentration of 100 mM, the DHA yield reached approximately 4.2 mM in GDH-Nox/Cys/PVP@ZIF-8, and the total turnover number of GDH-Nox/Cys/PVP@ZIF-8 reached 2787 at 0.05 µM NAD + , indicating its feasibility for large-scale DHA production. This work has thus provided a promising procedure of co-immobilizing enzymes via Cys/PVP-assisted in situ encapsulation within ZIF-8 for the development of economically viable multienzyme biocatalysts for glycerol conversion.
研究领域:
生物化学
·
工业生物技术
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产品关联
DOI
高影响因子
ACS Omega
·
2025
·
IF 4.3
Yixin Chen,Zexi Chen,Sheng Chu
Metal–organic frameworks (MOFs) hold significant potential for applications in gas adsorption and separation, catalysis, chemical sensing, and drug delivery. Zeolitic imidazolate frameworks (ZIFs) are a type of MOF composed of metal ions and imidazolate ligands, structurally similar to zeolite structures. ZIF-8, a widely studied ZIF material, is composed of zinc ions (Zn2+) and 2-methylimidazole as fundamental building blocks featuring unique porous structures, a high specific surface area, and excellent thermal and chemical stability. This study introduces a rapid room-temperature synthesis method for bimetallic ZIF-8 through the hydroxide double salt (HDS) precursor. Various characterization techniques confirmed that the synthesized bimetallic ZIF-8 exhibits uniform particle size and high crystallinity. Experimental results indicate that the HDS precursor provides numerous active sites, facilitating rapid nucleation and resulting in uniformly sized bimetallic ZIF-8 particles. By optimizing the ultrasonic time of HDS, the concentration of 2-methylimidazole, and the reaction time, the synthesis conditions were refined, producing bimetallic ZIF-8 particles with an average size of 135.0 nm and a minimum polydispersity index (PDI) of 0.024. Additionally, the copper ion adsorption performance was evaluated, with the synthesized bimetallic ZIF-8 showing the highest adsorption capacity of 1196.82 mg/g at pH 6, demonstrating its effectiveness in heavy metal removal.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Industrial Chemistry & Materials
·
2024
·
IF 0
Haiqi Zhang,Kaikai Zhao,Weibiao Guo,Kuan Liang,Jingjing Li,Xu Li,Qianjun Deng,Xuejun Xu,Huixia Chao,Hongxia Xi,Chongxiong Duan
Facile synthesis conditions, abundant hierarchical porosity, and high space–time yields (STYs) are prerequisites for the commercial application of zeolitic imidazolate frameworks (ZIFs). However, these prerequisites are rarely achieved simultaneously. Herein, a green and versatile strategy to rapidly synthesize hierarchically porous ZIFs (HP-ZIFs) was developed using an alkali as a deprotonating agent. The synthesis conditions were room temperature and ambient pressure in an aqueous solution, and the synthesis time could be reduced to 1 min. The produced HP-ZIFs had hierarchically porous structures with mesopores and macropores interconnected with micropores. The STY for HP-ZIFs was up to 9670 kg m−3 d−1, at least 712 times the previously reported values. In addition, the porosity and morphology of the produced HP-ZIFs could be fine-tuned by controlling the synthesis parameters (e.g., reaction time, molar ratios, metal source, and alkali source). Compared with conventional ZIFs, the adsorption performance of the as-synthesized HP-ZIFs for p-xylene and n-hexane was significantly improved. Positron annihilation lifetime spectroscopy (PALS) was utilized to study the pore properties, and the adsorption behavior of HP-ZIFs on guest molecules was investigated using density functional theory (DFT) simulations. This strategy shows significant promise for the large-scale industrial production of desirable HP-ZIFs for adsorption applications.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
DOI
ACS Applied Nano Materials
·
2025
·
IF 5.5
Xiang Li,Yanfei Chen,Baoliang Li,Gaowei Nie,Wenjie Huang,Hangran Pei,Wanying Han,Weili Shao,Jianxin He,Rongwu Wang,Xintao Yu,Diedie Wei,Dandan Chen,Yuping Xiong,Pengju Han
Oil–water separation is critical to ensuring the reliability of industrial oils. However, commonly used polymer separation materials can be difficult to degrade, contributing to white pollution. This study used electrospinning and seed-assisted in situ growth methods to combine the biodegradability of polylactic acid (PLA) with the high wettability and photocatalytic activity of a zeolitic imidazolate framework (ZIF-8). The resulting PLA@ZIF-8 nanofiber composites exhibited both efficient oil–water separation and self-cleaning contaminant removal abilities. The mild growth conditions of ZIF-8 and the seed-assisted method overcame the limitations regarding the in situ growth of metal–organic frameworks on PLA substrates. Experiments and COMSOL simulations revealed that the rough papillary structure of the ZIF-8 formed on the surface of the nanofiber membrane improved the oleophilicity and hydrophobicity of the PLA materials, thereby enhancing the oil–water separation performance, realizing a separation efficiency of >99.8% and maximum flux of 6280 L m–2 h–1. Under UV light irradiation, the composite membrane achieved a diesel degradation rate of 92.8%, thereby addressing the problem of reduced service life owing to fouling and pore blockage in current oil–water separation applications. The removal rate of the water-soluble pollutant methylene blue was 99.7%. Notably, the PLA@ZIF-8 membrane demonstrated excellent biodegradability and almost completely degraded after being buried in outdoor soil for 120 days, thereby avoiding white pollution. The proposed multifunctional membrane provides an efficient and environmentally friendly solution for industrial oil–water separation processes.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2024
·
IF 1.5
Dai Wei,Dai Ying,Fang Chenglei,Xu Lin,Wang Yusheng,Zhou Haiyan,Zhong Xing,Li Zhuyao,Tao Qinqin
The development of environmentally friendly, operationally simple, and easily separable adsorbents for uranium removal from wastewater holds significant importance. The biopolymer gelatin (Gel) derived from animal collagen has poor water stability, limiting its application in wastewater treatment. By in-situ compositing with ZIF-67, a nitrogen-rich and stable metal–organic framework structure introduced onto the surface of gelatin fibers enhanced the uranium adsorption capacity of gelatin nanofibers and improved the water stability of these fibers. Furthermore, through the natural polyphenolic tannic acid tanning process, it is possible to further increase selectivity of gelatin composite fibers. The gelatin composite nanofibers Gel/ZIF-67 and T-Gel/ZIF-67 were characterized using SEM, FT-IR, XRD, XPS, and contact angle. Adsorption of uranium on both nanofibers were significantly influenced by pH but minimally affected by ionic strength, indicating the inner-sphere surface complexation. The adsorption of uranium onto Gel/ZIF-67 and T-Gel/ZIF-67 followed the Langmuir isotherm model, with theoretical adsorption capacities reaching up to 608.21 mg g −1 and 612.24 mg g −1 , respectively. Kinetic modeling analysis revealed that chemical adsorption played a dominant role during the adsorption processes.
研究领域:
环境科学
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材料科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2025
·
IF 10.5
Xu Yang,Fan Wu,Haowei Huang,Guojun Zheng,Hongyu Zhang,Wenrong Cai,Junyao Li,Zheng-Zhi Yin,Yong Kong
Wearable sensors can easily enable real-time and noninvasive glucose (Glu) monitoring, providing vital information for effectively preventing various complications caused by high glucose level. Here, a wearable sensor based on nanozyme-catalyzed cascade reactions is designed for Glu monitoring in sweat. Au nanoparticles (AuNPs) are anchored to the carbonated zeolitic imidazolate framework-8 (ZIF-8-C), endowing the sensor with Glu oxidase (GOx)-like and peroxidase (POD)-like activity. A flexible screen-printed carbon electrode (SPCE) is decorated with the resultant AuNPs@ZIF-8-C, which is further modified with biocompatible and swellable calcium alginate (CA) gels for the preparation of the wearable Glu sensor. The linear range for Glu detection is 10∼300 μM with a limit of detection (LOD) of 4.99 μM, which covers the physiological Glu concentration range in human sweat (10–200 μM). The developed wearable Glu sensor can fit well with the skin tissues due to the flexibility of the SPCE, and thus it can be successfully applied in real-time and noninvasive monitoring of Glu in human sweat. Additionally, the wearable Glu sensor exhibits high antibacterial activity resulted from the generated hydroxyl radicals (·OH), enabling long-term Glu monitoring in sweat.
研究领域:
生物医学工程
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材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Chemosensors
·
2025
·Vol. 13
·期 9
·342
·
IF 3.7
Juncheng Chen,Caizhang Wu,Zhike Zhao,Ruihao Xue
An electrochemical aptamer sensor for the sensitive detection of aflatoxin B1(AFB1) in corn samples was developed using nanocomposites loaded with copper nanoparticles (CuNPs) on zeolitic imidazolate framework-8 (ZIF-8), which were modified on a glassy carbon electrode (GCE). The CuNPs@ZIF-8 nanocomposites served as modifying materials for electrodes, exhibiting a high specific surface area and excellent compatibility with aptamers, thereby enhancing the electron transfer rate and increasing the aptamer loading and immobilization efficiency. The electrochemical properties before and after modification were investigated and validated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques, while the sensor’s performance was analyzed through quantitative detection via differential pulse voltammetry (DPV). Furthermore, various conditions, including the volume of ZIF-8 dispersion, electrodeposition time of copper nanoparticles, aptamer concentration, and AFB1incubation time, were optimized. The results indicated that the sensor exhibited a wide linear range (10.0 to 1.0 × 106pg/mL), with a lower limit of detection (LOD) of 1.13 pg/mL under optimized conditions, outperforming other reported aptamer sensors. The spiked recoveries in corn samples ranged from 96.663% to 105.72%. In conclusion, this sensor presents a novel solution for low-cost and high-sensitivity detection of AFB1.
研究领域:
分析化学
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食品安全
·
电化学传感器
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纳米材料
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 9
·e70365
·
IF 0
Jing Lv,Danni Wang,Dongjing Wang,Xiu Ning,Xiao Wang,Xiaoyang Xu,Xiaofang Wang,Bin Liu
Pathogenic microorganisms pose a growing threat to public health, particularly in light of the escalating challenge of antibiotic resistance. Consequently, there is a pressing demand for the development of innovative antimicrobial strategies. In recent years, sonodynamic antimicrobial chemotherapy (SACT) has emerged as a promising approach. In this investigation, we engineered a nanoscale organic–inorganic hybrid sonosensitizer Curcumin@ZIF-8 (CCM@ZIF-8), which featured a large surface area, high porosity, and excellent sonodynamic activity. It was mainly reflected that, under ultrasonic irradiation, CCM@ZIF-8 not only reduced the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values of the three strains but also its bactericidal effect was significantly higher than that of the nonultrasound group. Furthermore, mechanistic studies revealed that its superior sonodynamic antibacterial performance was attributed to the comprehensive effect, such as boosting intracellular reactive oxygen species generation, enhancing bacterial uptake of CCM, consistently releasing CCM, disrupting bacterial biofilms, inducing protein leakage, and ultimately achieving bactericidal effects. These insights contribute to a deeper understanding of the potential mechanisms underlying SACT. In conclusion, this study presents a novel antimicrobial therapeutic strategy for combating infectious diseases.
研究领域:
纳米技术
·
抗菌治疗
·
材料科学
·
生物医学工程
·
微生物学
✓ 已验证
产品关联
DOI
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Douchao Mei,Lijia Liu,Huan Li,Yudan Wang,Fuqiu Ma,Chunhong Zhang,Hongxing Dong
Herein, a dual-function Zeolitic Imidazole Frameworks (ZIFs) ZIF-90 grafted with malononitrile by Knoevenagel reaction and following with an amidoximation reaction to form an efficient U (VI) adsorbent ( ZIF-90-AO ). The strong chelation power of amidoxime groups (AO) with uranium and ZIF-90 ’s mesoporous structure afforded ZIF-90-AO high maximum uranium adsorption capacity of 468.3 mg/g (pH = 5). In addition, the factors affecting uranium adsorption process were investigated by a batch of adsorption tests under different adsorption conditions. ZIF-90-AO displayed good selectivity to UO 2 2+ in the solution containing multiple co-existing ions and good regeneration property. More importantly, ZIF-90-AO showed excellent antimicrobial property against both E. coli and S. aureus . Therefore, ZIF-90-AO is a U-adsorbent with great application value for removing U (VI) from wastewater due to the high U (VI) adsorption capacity in weak acid condition and good anti-biofouling properties.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
SOLID STATE IONICS
·
2020
·
IF 3.107
Ying Zhou,Tingting Zhou,Yipeng Zhang,Li Tang,Qing Guo,Mingfeng Wang,Changsheng Xie,Dawen Zeng
Core-shell heterostructures of metal oxide semiconductor (MOS) and metal organic framework (MOF) improve gas-sensing properties due to the MOF's molecular sieving effects. However, the selection of MOF is limited by the requirement of identical metal element in MOF to that in MOS, which is crucial for valid interface adhesion. In this paper, WO 3 @ZIF-71 (zeolitic imidazolate framework) structure with different metal elemental components (W and Zn) was fabricated by a step-by-step (SBS) approach. As a result, ZIF-71 was uniformly coated on the surface of WO 3 . In order to explore the influence of ZIF-71 (pore size: 4.8 Å), the gas sensitivity of WO 3 and WO 3 @ZIF-71 were tested. Different kinetic diameters gases: H 2 S (3.62 Å), CH 3 COCH 3 (4.6 Å), CH 3 CH 2 OH (4.53 Å), NO 2 (5.8 Å) were selected as testing gas. Gases with small molecules (H 2 S, CH 3 COCH 3 and CH 3 CH 2 OH) can pass through the membrane of ZIF-71 and contact with WO 3 , while larger ones (NO 2 ) were blocked outside the membrane. Excitingly, the response of WO 3 @ZIF-71 toward H 2 S gas was significantly improved, which soars from 2.24 of 20 ppm for pure WO 3 to 19.12 for H 2 S at 250 °C, increased about 9 times. These results indicate that the MOS@MOF core-shell structure can be synthesized by the SBS method without the restriction of the same metal elements in MOS and MOF, which is also an effective approach to regulate the selectivity and sensitivity of the MOS@MOF gas sensor.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）