Materials Today Communications
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2025
·
IF 4.5
Zhe Tu,Hongxiang Ou,Yining Ran,Honglai Xue,Fang Zhu
The synthesis of a multifunctional flame retardant that combines flame retardancy, smoke suppression, and toughening effects is essential for expanding the range of applications for polyolefins. Inspired by the superhydrophobicity and low surface energy due to the lotus leaf micro/nano hierarchical structure, in this paper, we constructed 2D-3D heterogeneous ZIF-67@MMT by growing ZIF-67 in situ on the surface of montmorillonite (MMT) layers using wet chemistry. Mismatch engineering and micro/nano-graded heterogeneous structure confer high dispersibility and a high specific surface area on MMT, thus optimizing the pore structure and catalytic activity. Polypropylene (PP) composites with 25 wt% intumescent flame retardant (IFR) and 3 wt% ZIF-67@MMT achieved a 32.1 % limiting oxygen index and a UL-94 V-0 rating. 3ZIF-67@MMT/IFR/PP showed a 93 %, 86 %, and 66 % reduction in peak heat release rate, total smoke production, and CO production, respectively. In addition, ZIF-67@MMT has good interfacial compatibility and mechanical interlocking with PP. The tensile strength and elongation at break of 3ZIF-67@MMT/IFR/PP were increased by 58 % and 64 %, respectively, compared to 2MMT/IFR/PP. This work provides an effective strategy for the design of multifunctional heterogeneous nanomaterials for fire safety and other potential applications.
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MICROCHIMICA ACTA
·
2017
·Vol. 184
·期 10
·4091-4098
·
IF 4.58
Liu Haochi,Chen Ligang,Ding Jie
The authors describe an efficient method for the extraction of tetracycline antibiotics (TCs) from water samples by using a new kind of core-shell adsorbent. It consists of a magnetite (Fe 3 O 4 ) core and a metal-organic framework (type ZIF-8) as the shell. The sorbent has a large specific surface and superparamagnetic response. The sorbent was characterized by transmission electron microscopy, X-ray photoelectron spectroscopy, nitrogen adsorption, and X-ray diffraction. The adsorption isotherms, dynamic adsorption, and mechanisms of interactions between tetracycline and sorbent were studied. Various parameters affecting the extraction efficiency were optimized. Following desorption of the TCs with methanol (containing 1% of acetic acid), they were quantified by using ultra-high performance liquid chromatography combined with mass spectrometry. The method has a linear range that extends from 0.5 to 50 ng·L −1 , and the limits of detection for tetracycline, chlortetracycline, and oxytetracycline are 0.125, 0.122 and 0.143 ng·L −1 , respectively. The relative standard deviations of intra-day and inter-day assays range from 3.3% to 8.5%, and from 2.8% to 8.3%, respectively. The recoveries of TCs (at spiking levels of 0.5, 5.0 and 50 ng·L −1 ) are in the range between 78.3% and 93.7%. The method was successfully applied to the determination of TCs in spiked river water, fish pond water, and livestock wastewater.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Jianing Zhang,Junjun Zhang,Lei Zhou,Nurmymeti Yasen,Abudulekemu Abudinaibi,Xiaowei Huang,Xiaodong Zhai,Zhihua Li,Jiyong Shi,Remah Sobhy,Ibrahim Khalifa,Xiaobo Zou
Intelligent films are essential for real-time monitoring of food spoilage. However, the application is often limited by challenges such as hydrophilicity and color instability. In this study, two high hydrophobic bilayer indicators based on sodium alginate-polyvinyl alcohol/chitosan-zein with alizarin grafted onto ZIF-8 carrier (AL@ZIF-8) were fabricated using the casting method and electrospinning, respectively. Molecular docking simulations confirmed the successful grafting of AL@ZIF-8 onto the film substrates. The performance of films was compared and the effectiveness in monitoring freshness indicators was evaluated. The cast film had a precisely controlled thickness due to self-assembly performance, resulting in superior mechanical properties (TS = 10.64 MPa, EB = 43.764 %). In comparison, the nanofiber films demonstrated higher UV-blocking ability (ΔE < 4), faster spoilage response, and greater safety (Cell viability >80 %). Importantly, the nanofiber films exhibited higher sensitivity in monitoring beef freshness, with a color change pattern strongly correlating with spoilage (R 2 = 0.8976).
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Yingdong Hao,Yonghui Zhao,Chunlai Zhang,Xinqing Chen,Nannan Sun,Wei Wei
Achieving a high yield of oxygenates and inhibiting overoxidation remain challenging for CH 4 photooxidation. Here, we report a catalyst with enriched Ag-ZnO interfaces by using ZIF-8 as the precursor. The resulting Ag/Z-450 photocatalysts show extraordinary efficiency in the photocatalytic oxidation of CH 4 , a high liquid oxygenate yield of 57.88 mmol·g cat −1 (28.94 mmol·g cat −1 ·h −1 ) and a selectivity of ∼100 % were obtained over 3.0Ag/Z-450, with HCHO as the major product (41.04 mmol·g cat −1 , ∼71 % selectivity). Mechanistic studies revealed that ZnO and Ag species acted as electron donors and acceptors, respectively, which enhanced charge carriers transfer and separation. CH 4 and O 2 can be effectively activated to generate •CH 3 and reactive oxygen species (ROS), their following reaction led to formation of CH 3 OOH, which can be further converted to CH 3 OH and HCHO. This work contributes to the development of a “two-in-one” CH 4 photooxidation catalyst system that simultaneously achieves unparallel productivity and selectivity.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Safdar Ali Amur,Quratulain Khuhro,Najaf Ali Soomro,Bharat Prasad Sharma,Ahmed Nadeem,Muhammad Tariq,Hao Liang
ZIF-8 has strong potential for biomedical applications due to its excellent biocompatibility. In this study, 89.67 % of natural drug magnolol (Mag) was loaded in ZIF-8 to form Mag@ZIF-8, which was subsequently modified with chitosan (CS) to obtain Mag@ZIF-8/CS. The prepared materials were characterized using the UV–Vis spectroscopy, FTIR, XRD, DLS, SEM and TEM techniques. Thermal stability of materials was analyzed using Thermos Gravimetric Analysis system. PDI and Z -average hydrodynamic sizes of Mag@ZIF-8/CS and Mag@ZIF-8 were increased compared to ZIF-8. Similarly, Mag@ZIF-8 revealed higher zeta potential (+17.5 ± 2.3 mV) than ZIF-8 (+9.8 ± 0.5 mV), but Mag@ZIF-8/CS exposed 3.2 ± 0.9 mV, in water; however, at pH 4 it was changed to +5 mV. Pure ZIF-8 and Mag@ZIF-8 exhibited a hexagonal morphology, while Mag@ZIF-8/CS had a rotund, flat-like structure, with mean particle size of 101 nm, 123 nm and 343 nm, respectively. Density Functional Theory (DFT) analysis offered a deeper insight into the electronic properties and binding interactions of the composites. Under acidic conditions, drug release from Mag@ZIF-8 was higher (86.4 %) and faster than from Mag@ZIF-8/CS (74 %), when tested at physiological pH 7.4 and 37 °C. This, suggests that CS modification of Mag@ZIF-8 is crucial for achieving prolonged and sustained drug release. Mag@ZIF-8 and Mag@ZIF-8/CS depicted a two-fold increase in antibacterial activity against E. coli and S. aureus , demonstrating a synergistic effect. The MIC value for E. coli and S. aureus were, 35 μg/mL and 20 μg/mL, respectively, confirming the enhanced antibacterial efficacy of the composites. Molecular docking analysis provided deeper insights into the binding interactions between the materials and the E. coli protein 5AZC.
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Sustainable Chemistry and Pharmacy
·
2024
·
IF 5.5
Xing Zhou,Ping-Yue Wang,Chen-Xi He,En-Jang Liu,Xiao-Hui Yao,Dong-Yang Zhang,Tao Chen
Recently, continuous-fluid catalysis technology has been widely used in biocatalysis. However, the poor stability of the reactor-supported enzyme and expensive manufacturing cost of the reactor restrict its use. Herein, a wood-based bioreactor, β-glucosidase@ zeolitic imidazolate framework-8@delignified wood (β-Glu@ZIF-8@DW), with attractive features was developed. The naturally oriented channels of the xylem-based reactor enable high throughput. The interference of the fluids through the porous inner walls in the directional channels of the xylem-based reactor considerably increased the probability of contact between the substrate and enzyme. Resveratrol with multifaceted biological activities exists in many plants, including Mulberry (Morus spp., Moraceae) and Camellia sinensis and Polygonum cuspidatum (P. cuspidatum) . However, it mainly presents in its glycosylated form (polydatin) rather than as free resveratrol in plant. To improve the acquisition of resveratrol, continuous convert polydatin into resveratrol by a bioreactor is a good strategy. The conversion rate of polydatin using the as-prepared reactor reached 98.98% in 2 h. The uniform distribution of β-Glu@ZIF-8 in the channel increased the stability of the bioreactor with an 80.28% conversion rate after seven cycles. The reactor provided an excellent strategy for continuous catalysis, which can be used for industrial production with low synthesis costs and high mass transfer efficiency. Therefore, it has great potential for commercial applications.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Lingsong Lu,Bei Liu
3D porous Fe 3 O 4 @ZIF-90 interface provides high-density DNA loading sites. • Mn 2+ -gated DNAzyme walker ensures a low-background controllable assay. • DNAzyme walker and CRISPR-Cas13a cascade enable dual signal amplification. • The biosensor demonstrated high accuracy and specificity in human serum samples. The precise quantification of Mucin-1 (MUC1) is vital for the early diagnosis and therapeutic monitoring of epithelial malignancies. In this study, a fluorescent biosensing platform based on a 3D porous metal-organic framework (MOF) and a cascaded signal amplification strategy was developed for MUC1 detection, driven by a target-induced conformational switch and Mn 2+ -dependent catalytic DNAzyme walking. Porous Fe 3 O 4 @ZIF-90 nanocomposites were used to construct the sensing interface, which co-immobilized dormant DNAzyme/aptamer duplexes and a high-density layer of substrate DNA (sub-DNA), serving as a robust platform for the subsequent walking process. Upon specific MUC1 recognition, the aptamer preferentially captures the target MUC1. The thermodynamic driving force induces the dissociation of the MUC1/aptamer complex, liberating the DNAzyme engine. Following magnetic separation to eliminate matrix interferences, the addition of Mn 2+ triggers the processive inter-molecular migration of the DNAzyme walker across the sub-DNA immobilized 3D porous Fe 3 O 4 @ZIF-90 interface via successive hybridization and site-specific cleavage of internal riboadenosine (rA) junctions. This inter-molecular walking process generates a high flux of trigger strands, which subsequently activates the CRISPR-Cas13a system for a robust trans -cleavage of dual-labeled fluorophore-quencher (FQ) reporters. The resulting degradation of FQ reporter enables sensitive MUC1 quantification through exponential fluorescence recovery. By synergizing the structure advantages of the 3D MOF with this cascaded signal amplification, the biosensor achieved a wide linear range from 0.37 nM to 500 nM with a low detection limit of 17.2 pM. Furthermore, the biosensor exhibited reliable specificity and recovery (102.28%–106.94%) in complex human serum assays. The proposed strategy effectively minimizes non-specific background leakage, demonstrating promising potential for the ultra-sensitive detection of MUC1 in complex biological matrices. Schematic presentation of the fluorescent biosensor for the determination of Mucin-1 based on a 3D porous Fe 3 O 4 @ZIF-90 interface and DNAzyme walker-mediated CRISPR-Cas13a cascade. Download: Download high-res image (117KB) Download: Download full-size image
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SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Wenhai Wang,Jiaxuan Li,Bin Hong,Yi Ma,Fei Chen,Keren Kang,Jufang Wang
High levels of Cu (II) in the human body can cause kidney dysfunction, liver cirrhosis, and many neurological diseases, such as Wilson’s disease (WD). Therefore, rapid and efficient detection of Cu (II) in urine is highly essential. First, by a simple multiple seeded growth method, the gold nanoclusters (Au NCs) embedded metal-organic framework (ZIF-8) is decorated on cellulose paper to generate a fluorescent Au NCs@ZIF-8 paper. Then the Au NCs@ZIF-8 paper is loaded on the fluidic cartridge integrated with the syringe for ultra-sensitive urine copper detection. The fluorescence paper is intercalated in a reusable fluidic cartridge and attached to a syringe, allowing the fluidic cartridge to flow a amount of samples through the paper. The interaction of Cu (II) with in situ growth of Au NCs@ZIF-8 on the paper induced fluorescence quenching , which fluorescence images can be recorded and analyzed by the portable smartphone-assisted device. Furthermore, a large amount of sample solution was flowed through the Au NCs@ZIF-8 paper, enabling more Cu (II) to react with the Au NCs@ZIF-8 paper on the novel paper-based analytical device (nPAD). Cu (II) detection can be completed by nPAD in 20 mins, and the limit of detection was as low as 9.2 nM. We show the value of the paper device for on-site detection of copper (II) and indicate that it has excellent potential for clinical applications and environmental monitoring.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Tingting Yu,Shaobin Li,Li Zhang,Fengbo Li,Jianxin Wang,Hong Pan,Deqing Zhang
Designing dual-functional electrode materials for supercapacitors and pollutant sensors has attracted great interest from researchers for urgent demand in green energy and the environment. In this work, a novel electrode material V 2 CT x @NiCoMn-OH was successfully constructed for dual-functional orientation via a two-step synthesis strategy, in which the NiCoMn-OH with a three-dimensional (3D) hollow structure was fabricated by employing ZIF-67 as a template and simple anion exchange and composited with the two-dimensional (2D) layered V 2 CT x MXene. The intercalation of NiCoMn-OH can effectively limit the self-accumulation of V 2 CT x MXene nanosheets and build a 3D cross-linked hollow structure, thereby broadening the ion transport channel, exposing more active sites of V 2 CT x @NiCoMn-OH, and simultaneously improving the conductivity of NiCoMn-OH. Benefiting from the unique 3D cross-linked hollow structure, the optimized V 2 CT x @NiCoMn-OH-20 electrode material exhibits an excellent specific capacitance of 827.45 C g −1 at 1 A g −1 . Furthermore, the electrode material has excellent capacitance retention of 88.44% after 10,000 cycles. Moreover, the V 2 CT x @NiCoMn-OH-20//AC ASC device displays a high energy density of 88.35 Wh kg −1 as well as high power density of 7500 W kg −1 during operation. Additionally, the V 2 CT x @NiCoMn-OH-20 exhibited excellent electrocatalytic performance in the detection of hydroquinone, including the low detection limit of 0.559 μM (S/N = 3) and the wide linear range of 2–1050 μM. Therefore, the prepared V 2 CT x @NiCoMn-OH-20 has great potential applications in the fields of supercapacitors and hydroquinone sensors.
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ANALYTICAL SCIENCES
·
2022
·Vol. 38
·期 10
·1305-1312
·
IF 1.967
Liu Piaotong,Hao Rusi,Sun Wenliang,Lin Ziyi,Jing Tianfeng,Yang Haizhen
A facile and efficient “bottle-around-ship” approach for preparing the ratiometric fluorescent probe has been developed by encapsulating the red-colored fluorescence CdTe quantum dots (QDs) and blue-colored fluorescence graphitic carbon nitride quantum dots (g-CNQDs) into the zeolitic imidazolate metal–organic frameworks (ZIF-8) in one step. At a single excitation of 360 nm, the obtained probe ZIF-8@g-CNQD/CdTe shows the dual-emission peaked at 450 and 633 nm, respectively. The red emission of CdTe QDs is selectively quenched by the Hg 2+ , whereas the blue fluorescence of g-CNQDs as an internal reference is insensitive, resulting in an apparent color transformation from pink to blue for special recognition of Hg 2+ . By this approach, the relative fluorescence intensity ratio ( F 633 / F 450 ) decreased linearly with increasing Hg 2+ concentration in the 0.2–3.5 μM range with a low limit of detection (LOD) of ~ 46 nM. Therefore, we demonstrate that this “bottle-around-ship” process provides a new strategy for the construction of ratiometric fluorescent Hg 2+ probes with good simplicity, high efficiency, and excellent stabilities. Moreover, the obtained Hg 2+ fluorescent probe shows good results in the detection of actual samples. Graphical abstract
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Nanoscale Advances
·
2023
·
IF 4.7
Guo-Ying Chen,Mao-Ling Luo,Li Chen,Tong-Qing Chai,Jia-Li Wang,Ling-Xiao Chen,Feng-Qing Yang
The combined application of nanozymes and natural enzymes has received widespread attention in recent years. In this work, a simple and efficient method was used to synthesize a composite material of CuO nanoparticles modified zeolitic imidazolate framework-8 (CuO NPs@ZIF-8) with multiple enzyme activities (glucose oxidase-like and hydrolase-like activities) to detect the activity of natural enzymes through fluorescence and colorimetric (UV-Vis) dual-mode detections. The hydrolase- and oxidase-like activities of CuO NPs@ZIF-8 show an acceptable affinity with L-ascorbic acid 2-phosphate trisodium (AAP) and o-phenylenediamine (OPD). Using the developed sensor, highly sensitive detection of natural enzymes glucose oxidase (GOX) and alkaline phosphatase (ALP) was achieved through both fluorescent and colorimetric analysis with a wide linear range (fluorescence for GOX: 0.86-1.23×105 mU/mL, UV-Vis for GOX: 0.081-1.62×105 mU/mL; fluorescence for ALP: 0.042-1.20×104 mU/mL, UV-Vis for ALP: 0.0046-1.23×104 mU/mL) and low LOQs (fluorescence for GOX: 0.86 mU/mL, UV-Vis for GOX: 0.081 mU/mL; fluorescence for ALP: 0.042 mU/mL, UV-Vis for ALP: 0.0046 mU/mL). Compared to the other fluorescent and colorimetric sensors, this sensor has better catalytic activity due to the addition of GOX and ALP, which can amplify the detection signal and improve the sensitivity. This is the first time that composite material CuO NPs@ZIF-8 with "tandem enzyme" activity was synthesized and applied in the detection of enzyme activity. Additionally, the proposed fluorescent and UV-Vis platforms exhibit the capability to detect GOX and ALP in serum samples with satisfactory recovery, indicating potential application prospects in biochemical analysis.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 26
·68691-68700
·
IF 5.8
Liu Yuhao,Wang Jieqi,Wang Xuyi,Chen Jiayue,Zhang Beibo,Chen Liping,Zheng Dan,Cheng Ming
It is a great challenge to develop photocatalysts for the degradation of organic pollutants in the aqueous environment, especially those with excellent catalytic performance under visible light conditions. In this work, using graphene oxide (GO) as an electron shuttle agent and carrier, a hybrid of ZIF-8/NH 2 -MIL-125(Ti) and GO (ZIF-8/NH 2 -MIL-125(Ti)/GO) was prepared by a simple two-step solvothermal method. The morphology, structure, and combination of the synthesized catalysts were studied. The results showed that graphene oxide and ZIF-8 formed an in situ load on NH 2 -MIL-125(Ti). The construction of hybrid materials significantly improved the catalytic activity of NH 2 -MIL-125(Ti) in the visible light range. The degradation activity of the synthesized catalyst was further tested with reactive red dye. The results showed that the catalyst exhibited excellent catalytic removal efficiency for active red, with a degradation rate of 99.8% within 2 h. The prepared hybrid materials have good application prospects in the field of organic pollutant treatment in water. Graphical Abstract
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