JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Yuxiao Feng,Yingjie Du,Geling Kuang,Le Zhong,Hongtong Hu,Shiru Jia,Jiandong Cui
Metal–organic frameworks (MOFs), with large specific surface area and tunable porosity, have gained lots of attention for immobilizing enzymes. However, the intrinsic open channels of most reported MOFs are generally smaller than 2 nm, which significantly prevents the passage of enzymes, and the diffusion efficiency of substrates and products. Here we report a new hierarchical micro-mesoporous zeolitic imidazolate framework-8 (ZIF-8) with core–shell superstructure (HZIF-8) using colloidal hydrated zinc sulfate (ZnSO 4 ·7H 2 O) as a soft template for enzyme immobilization. The ZnSO 4 ·7H 2 O forms an aggregation of colloids due to the self-conglobation effect in methanol, which affords a soft template for the formation of HZIF-8. Cytochrome C (Cyt C) was immobilized in interior of HZIF-8 through entrapment during the formation of HZIF-8. The resultant immobilized Cyt C (Cyt [email protected] ) exhibited 4-fold and 3-fold higher activity than free Cyt C and Cyt C encapsulated in conventional microporous ZIF-8 (Cyt [email protected] ), respectively. Meanwhile, the Km value of Cyt [email protected] significantly decreased due to the presence of mesopores compared with Cyt [email protected] , indicating enhanced substrate affinity. After 7 cycles, Cyt [email protected] still maintained 70% of its initial activity whereas Cyt [email protected] only retained 10% of its initial activity. Moreover, the obtained HZIF-8 showed outstanding performance in co-immobilization of multi-enzyme for the detection of glucose.
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Food Chemistry-X
·
2026
·
IF 9.2
Rui Liu,Yu Cheng,Yuanwei Peng,Xuelin Fan,Songzhi Xie,Baohua Liu,Rui Qi,Li Yang,Chun Zhang,Hesheng Xia,Jian Wang
PANAM loaded with ZIF-8 and CV was successfully synthesized. • PANAM@ZIF-8@CV were mixed with crosslinked PVA to prepare the composite pad. • The triple synergistic effect realized long-term sustained release of CV. • PANAM@ZIF-8@CV/PVA presented excellent antioxidant and antibacterial properties. • The PANAM@ZIF-8@CV/PVA composite can realize the long-term blueberry preservation. To achieve long-term sustained release of active antibacterial substances and prolong food shelf life, polyacrylonitrile microspheres (PANAM) loaded with ZIF-8 and carvacrol (CV) were fabricated and then blended with crosslinked PVA matrix to prepare a composite pad (PANAM@ZIF-8@CV/PVA). SEM, XPS and XRD results showed ZIF-8 and CV were successfully immobilized in PANAM's porous structure, which effectively enriched active sites and realized efficient anchoring of CV. The triple synergy of ZIF-8, PANAM and polymer matrix enables long-term CV release. Compared with other PVA composite pads containing the same CV content, PANAM@ZIF-8@CV/PVA presented a superior long-term slow-release effect and thus exhibited excellent antioxidant and long-lasting antibacterial properties after 30 days of storage. During 15-day blueberry storage, this composite pad reduced respiratory intensity and weight loss while preserving firmness and nutrients. Thus, blueberries retained intact morphology and fresh taste, demonstrating great potential of PANAM@ZIF-8@CV/PVA in long-term blueberry preservation. Download: Download high-res image (201KB) Download: Download full-size image
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PROGRESS IN ORGANIC COATINGS
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2026
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IF 7.9
Zhuo Wang,Lu Yuan,Juan Ji,Haobo Zhu,Yuxing Qin,JianFeng Zhu,Li Zhang,WenLing Wu,Yuan Fang
A smart anti-corrosion coating featuring ZIF-8 nanocontainers was developed for bronze artifact conservation. • ZIF-8 serves a dual function: accelerating epoxy resin curing and enabling pH-responsive release of benzotriazole. • The optimized coating (2.0 wt% filler) exhibits superior barrier properties and enhanced corrosion resistance. • Active self-healing is triggered by damage, where released inhibitor forms a Cu-N coordination film to inhibit corrosion. The effective conservation of bronze artifacts is hindered by the shortcomings of conventional protective coatings. These materials typically cannot self-repairing after damage, allowing corrosion to progress, and often require high curing temperatures that may damage the bronze artifacts. To address these issues, this study develops a multifunctional epoxy coating based on zeolitic imidazolate framework-8 (ZIF-8). ZIF-8 plays a dual role in this system: as a curing accelerator, its tertiary amine groups catalyze the epoxy curing reaction, significantly reducing the activation energy from 130.74 kJ·mol −1 to 59.06 kJ·mol −1 ; and as a pH-responsive nanocontainer, it encapsulates the corrosion inhibitor benzotriazole (BTA) and releases BTA intelligently upon coating damage and corrosion-induced acidic microenvironment-triggered, enabling active self-repairing. Experimental results show that with a BTA loading of 8 mol% and a filler content of 2.0 wt%, the coating exhibits optimal long-term anti-corrosion performance during a 50-day immersion test. After scratching, the low-frequency impedance modulus of the coating recovers rapidly within 2 h and peaks between 8 and 12 h, confirming its fast self-repairing capability. Raman spectroscopy and theoretical calculations reveal that the repairing mechanism stems from the formation of a stable protective film via Cu N coordination between released BTA and the bronze substrate. This work provides an intelligent protection strategy for bronze artifacts, integrating 70 °C curing with active self-repairing functionality. Download: Download high-res image (128KB) Download: Download full-size image
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
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IF 7.2
Mengting Shen,Liwei Lin,Yanan Wang,Qian Liang,Man Zhou,Zhongyu Li,Song Xu
Photocatalytic hydrogen production technology is an effective method for solving environmental pollution problems and obtaining renewable energy. In order to improve the efficiency of hydrogen production , the development of new photocatalysts with high activity and stability remains a great challenge. In this work, we report the formation of CoS/Mn 0·2 Cd 0·8 S heterostructures by combining ZIF-67-derived CoS with Mn 0·2 Cd 0·8 S using a template method and exhibiting excellent photocatalytic hydrogen production performance. Systematic studies have shown that the CoS/Mn 0·2 Cd 0·8 S heterostructure has a strong light-trapping ability, which enhances charge separation and transfer due to its abundant reactive sites and heterostructure. The photocatalytic hydrogen production rate under visible light conditions was 43.7 mmol g −1 h −1 , which was 43.7 and 14.1 times higher than that of pure CoS and pure Mn 0·2 Cd 0·8 S, respectively. Importantly, the photocatalytic performance remained essentially unchanged after four cycles. In addition, the internal space of CoS/Mn 0·2 Cd 0·8 S can be effectively utilized to provide abundant reaction sites, which further promotes the photocatalytic hydrogen production.
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CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Lan Ding,Ling Sun,Ziwei Wang,Di Li,Qiuyan Zhang,Xiaohui Liu,Yuanlin Ren,Yuesheng Li
Multifunctional cellulose fabrics with flame retardancy, electrical conductivity and UV resistance are expected to be used in the next generation of wearable flexible sensors, so there is an urgent need to develop novel coating systems that improve the natural properties of cellulose fabrics and give it more functionality. Here, a 2D-3D hetero-structured multifunctional coating consisting of titanium carbide (Ti 3 C 2 Tx MXene), zeolitic imidazolate framework-8 (ZIF-8) and phosphonitrilic chloride trimer (PPZ) was constructed on cotton/lyocell blended fabrics (C/L) by a one-pot impregnation method. Briefly, C/L first interacted with MXene via hydrogen bonding, and then the ZIF-8 encapsulation system grew in situ on MXene. The optimal sample obtained, named as MXene@ZIF-8@PPZ-C/L, combines flame retardancy, human motion detection and UV resistance. Compared to the untreated C/L, MXene@ZIF-8@PPZ-C/L exhibited a limiting oxygen index value of up to 30.8%, with peak heat release rate and total heat release values reduced by 65.7% and 15.8%, respectively. Meanwhile, MXene@ZIF-8@PPZ-C/L with an electrical conductivity of 24.4 s/m was able to sense human movement stably and continuously. Moreover, MXene@ZIF-8@PPZ-C/L also showed a high ultraviolet protection factor. In short, this work provided a simple method for fabricating new-generation multifunctional flexible wearable smart fabrics.
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JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2023
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IF 2.9
Zhan Ke,Du Yongkun,Liu Qingqing,Cui Chenxu,Xing Guangxu,Li Shanshan,Ren Hongtao,Wang Fan,Xu Chao,Wang Na
Wheat gliadin is thought to be the main cause of wheat allergy leading to celiac disease. In this study, we reported an electrochemical immunosensor based on AuNPs/Zn/Ni-ZIF-8-800@graphene for simple, efficient, and sensitive detection of gliadin. A monoclonal antibody against gliadin were prepared by hybridoma technique. Zn/Ni-ZIF-8-800 with high stability was prepared by using zinc–nickel bimetallic organic framework MOFs, and graphene and gold nanoparticles with large surface area and excellent conductivity were introduced. Chitosan was used as a binder to fixed the composite on the surface of glassy carbon electrode. The fabricated materials and the corresponding sensors were comprehensively characterized by X-ray diffractometer, scanning electron microscope, transmission electron microscopy, Fourier transform infrared spectroscopy, Brunauer–Emmett–Teller, and cyclic voltammetry analyses. Under the optimal conditions, the linear range of the electrochemical immunosensor was 0.1–100 μg mL −1 , and the detection limit was 0.950 μg mL −1 . In addition, the fabricated sensor exhibited high selectivity and long-term stability. The recovery test showed that the prepared sensor was suitable for the detection of gliadin in real food and feed, exhibiting great promising of the developed sensor in practical application. Graphical abstract
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ACS Omega
·
2023
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IF 4.1
Jianqiao Kong,Song Xu,Yang Dai,Yi Wang,Yun Zhao,Peng Zhang
Chemotherapeutic agents fail in clinical chemotherapy in the absence of targeting and acquired resistance. We, therefore, synthesized Fe3O4@ZIF-8@Sor@TA nanocomposite drugs based on the drug delivery properties of nanomaterials. ZIF-8 is a nanomaterial with a porous structure that can load anticancer drugs. The nanodrug used the paramagnetic property of Fe3O4 to deliver sorafenib (Sor) precisely to the tumor site, then used the pH responsiveness of ZIF-8 to slowly release Sor in the tumor microenvironment, and finally used tannic acid (TA) to inhibit P-glycoprotein to suppress the Sor resistance. The results of material characterization presented that the prepared material was structurally stable and was able to achieve a cumulative drug release of 38.2% at pH 5.0 for 72 h. The good biocompatibility of the composite was demonstrated by in vitro and in vivo experiments, which could improve antitumor activity and reduce Sor resistance through magnetic targeting TA. In conclusion, the Fe3O4@ZIF-8@Sor@TA material prepared in this study demonstrated high antitumor activity in hepatocellular carcinoma treatment, promising to reduce drug resistance and providing a novel research approach for cancer treatment.
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Analytical Methods
·
2021
·Vol. 13
·期 47
·5777-5786
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IF 2.896
Jinyang Chen,Jiamei Wang,Ruihong Ye,Dihui Huang,Sheng Chen
The low conductivity of metal–organic frameworks seriously impedes their electrocatalytic performance. In this study, we prepared a fabricated sandwich structure composed of a Co-based zeolitic imidazolate framework (ZIF-67) and reduced graphene oxide (rGO) through a facile and simple one-pot hydrothermal reaction. This framework of nanocomposites, which are modified with a glassy carbon electrode, constructed a bisphenol A (BPA) electrochemical sensor for the first time. Operational parameters such as pH, electrolytes, the amount of modifiers, deposition potentials and deposition time were optimised for the sensitive detection of BPA. The performance of electrodes was evaluated by cyclic voltammetry, electrochemical impedance spectroscopy, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction and transmission electron microscopy. With differential pulse voltammetry, the detection concentration of BPA ranged from 0.05 μmol L−1 to 100 μmol L−1. The results revealed that the hierarchical nanocomposites demonstrated better electrocatalytic performance with large electrochemically active surface areas, high sensitivity and a low limit of detection (5.2 nmol L−1), compared with a physical mixture of ZIF-67 and rGO at the same ratio. These impressive features originate from the synergistic effects of ZIF-67 and rGO. This study presents a new strategy using metal–organic framework composite materials for the sensitive detection of BPA.
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ChemCatChem
·
2021
·Vol. 13
·期 24
·5166-5177
·
IF 5.686
Chuanhui Li,Ye Meng,Song Yang,Hu Li
Graphical Access to bio-nitrogenous chemicals : A Co-embedded N-doped carbon nanocatalyst can efficiently promote Leuckart-type reductive amination of biomass-derived carbonyls to prepare N-formyl compounds, which benefits from the synergy of its Co NPs and N base sites. The initial formation of the C−N bond occurs between carbonyls and H 2 NCHO rather than HCOONH 4 . It is of great significance to develop non-precious metal catalysts with excellent catalytic activity, stability, and acid resistance for biomass valorization. Herein, catalytic amination of biomass carbonyl compounds was achieved via a Leuckart-type reaction over Co nanoparticles (NPs) embedded N -doped carbon catalyst, which was prepared by thermolysis of ZIF-67 precursor at different temperatures in the N 2 atmosphere. The Co/NC-800 catalyst exhibited excellent catalytic activity and recyclability in furfural reductive amination to mono-substituted formamide, which was attributed to the synergistic catalytic action of Co NPs and nitrogen base sites of the catalyst. The reductive amination mechanisms were elucidated by theoretical calculations, and showed that the initial formation of C−N bond was derived from the condensation of furfural and formamide, followed by dehydration to form C=N double bond, which was then reduced by hydrogen species Co−H − and NH + . The developed catalytic system was applicable to different carbonyls for the synthesis of corresponding N -formyl compounds with up to 99 % yield.
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CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Ying Wu,Guilu Xu,Weilin Zhang,Chi Song,Linjie Wang,Xingyu Fang,Lijie Xu,Shuguang Han,Juqing Cui,Lu Gan
In this study, binder-free hybrid supercapacitance electrode based on N, Co co -doped porous carbon polyhedral encapsulated carbon nanofibers composites (N-Co/CNF) was prepared through pyrolyzing cobalt based zeolitic imidazolate frameworks (ZIF-67(Co)) incorporated electrospun cellulose nanofibers. With rational combination of the conductivity provided by cellulose derived CNF, promising porosity provided by CNF and ZIF-67(Co) derived porous carbon and uniformly dispersed metallic cobalt nanoparticles , the N-Co/CNF displayed excellent electrochemical properties. Specifically, the N-Co/CNF pyrolyzed at 800 °C possessed superior electrochemical performance in 1 M H 2 SO 4 electrolyte, including a specific capacitance of ~433 F/g and 84% of the capacitance retention after 3000 consecutive charge-discharge cycles. This significantly exceeded the performance of cellulose derived CNF based pure carbonaceous electrode. Therefore, the present study provides a new view on the construction of high performance hybrid supercapacitance electrode which introduces renewable biomass resources like cellulose as both carbonaceous material precursors and conductive binders.
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Materials Research Express
·
2021
·Vol. 8
·期 4
·045012
·
IF 1.62
Fei Ge,Rui Qiao,Ping Song,Yugui Tao,Longbao Zhu,Weiwei Zhang,Wanzhen Li,Lin Gui
Tumors area common cause of morbidity and mortality. High treatment efficiency and low drug toxicity are key for effective tumor treatment. Here, the pH-sensitive material ZIF-90 was synthesized by the liquid-phase diffusion method for loading paclitaxel (PTX), and the targeting peptide (RGD) was prepared by the solid-phase synthesis method to modify it (RGD/PTX@ZIF-90). The skeleton of RGD/PTX@ZIF-90 collapses in the acidic tumor microenvironment, thereby releasing PTX and mediating the controlled release of the drug. ZIF-90 below 300 nm was obtained by adjusting the ratio of metal ions and organic ligands in the characterization experiment. In addition, in vitro drug release experiments showed that the drug release rate was greater at pH = 5.5 than at pH = 7.4. The lethal rate of RGD/PTX@ZIF-90 to human breast cancer cells (MCF-7) was 44.5%, which was higher than the lethal rate of PTX alone (37.3%) in the cytotoxicity experiment and apoptosis experiment. Uptake experiments revealed that RGD/PTX@ZIF-90 mainly existed in the cytoplasm of MCF-7, which suggests that the drug had successfully entered the cell to achieve the therapeutic effect. The loading of the nano-medicine carrier ZIF-90 and the modification of the targeting peptide RGD significantly improve the therapeutic effect of PTX and indicate that this system could be used to treat breast cancer.
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ANALYTICAL BIOCHEMISTRY
·
2021
·
IF 3.365
Xin Liu,Jihong Fu,Lili Wang,Caijuan Wang
A novel microwave-assisted (MA) headspace solid-phase extraction (HS-SPE) based on polydimethylsiloxane (PDMS)/ZIF-8@GO sponge was developed for the simultaneous extraction and determination of essential oil constituents in lavender. The PDMS/ZIF-8@GO sponge with a high surface area and excellent adsorption capacity was successfully applied in the HS-SPE process. Microwave-assisted coupled with PDMS/ZIF-8@GO sponge headspace solid-phase extraction followed by GC-MS was proposed. Different experimental parameters were investigated. The optimal conditions were found to be as follows: 2:1 as the quality ratio of ZIF-8 to GO , ZIF-8@GO dosage of 30 mg, microwave power of 600 W, extraction time of 10 min and desorption solvent of n -hexane. This method was successfully applied to the analysis of 11 samples of lavender in different varieties. A total of 52 compounds were identified by the proposed method. A good linearity was observed from 14 to 800 ng with a correlation coefficient (R 2 ) value of >0.99. Multivariate statistical analysis was used to establish the relationship between the varieties and the volatile components for further discriminant analysis. These results demonstrated that the MA-PDMS/ZIF-8@GO is an efficient, sensitive and small sample consumption method for the determination of the essential oil in dried plant materials.
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