MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 10
·1-14
·
IF 5.3
Bi Leyao,Fu Boyan,Lin Jiahui,Wen Junsheng,Fu Jiaxing,Tian Wenyue,Su Ningning,Zou Binglin,Wang Chunjie,Wang Yue
Soda biscuit-like Ag-ZnO@ZIF-8 heterostructures were successfully synthesized using a secondary hydrothermal method for the first time, demonstrating exceptional ethylene glycol sensing performance. The sample (2-Methylimidazol (MeIm) concentration of 0.04 g) exhibits a remarkable response value of 1325.50 to 100 ppm ethylene glycol at 240 °C, along with a rapid response time of merely 7 s. Additionally, it displays outstanding gas selectivity (k = 28.63–696.90), great reproducibility and long-term stability. Further experiments indicate that the enhancement of the composite material’s gas sensing performance can be primarily attributed to the interfacial electron transfer effect, the abundance of oxygen vacancies, and the synergistic interactions within the heterostructures. Overall, this study lays a solid theoretical foundation for the practical detection applications of ethylene glycol and provides new insights into the research on gas sensors based on ZnO-organic frameworks. Graphical
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Journal of Physical Chemistry C
·
2025
·
IF 3.2
Wei Zeng,Sili luo,Da Rong,Yanlong Li,Yunying Fei,Meng Zhao,Linsheng Huang
A highly sensitive electrochemical sensor based on a composite of two-dimensional (2D) reduced graphene oxide (rGO) and three-dimensional (3D) zeolitic imidazolate framework-8 (ZIF-8) for detecting the NH4+ ion is reported. The ZIF-8/rGO composite electrode is in situ grown to be anchored on the Si/Ag substrate. Here, the rGO layer has high conductivity, while ZIF-8 has a large specific surface area, which provides a large number of active sites. This structure significantly increases the electrical conductivity and enhances the electrochemical performance. With a differential pulse voltammetry measurement at the pH value of 7.00, the multidimensional composite electrode with the optimal ZIF-8 structure exhibits a sensitivity of 9.30 μA μM–1, and a detection range of 5–50 μM with a low detection limit of 3.00 × 10–9 M, as well as high repeatability, stability, and selectivity. These results might be due to the oxidation reaction of NH4+ with the ZIF-8 framework and the special 2D–3D electron transfer channel formed by the composite.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Hua-Bin Yuan,Lan Wei,Jiapeng Wang,Manman Zhao,Guoqiang Chen,Tieling Xing,Zhong Chen
Textile-based flexible sensors with passive anti-icing, active de-icing capabilities, and information transmission are of significant value, especially in low-temperature environments. This study introduced a hierarchically structured textile (PPTZC) composed of zeolitic imidazolate framework-8 (ZIF-8), tannic acid (TA), polypyrrole, and polydimethylsiloxane (PDMS) modified cotton fabric. The innovative design of introducing ZIF-8, followed by etching it with TA to form a hollow structure, enhanced the wearability (breathability, flexibility, lightness, stability, and UV-blocking performance) of the cotton fabric and improved its sensing sensitivity. PPTZC exhibited excellent superhydrophobicity, self-cleaning, anti-icing, photothermal de-icing, and information transmission capabilities. With a light absorbance of 90–95 %, it can rapidly melt ice through photothermal conversion. In a − 20°C environment, the surface temperature of PPTZC can quickly rise from − 20°C to approximately 25°C under 1 sun of irradiation. Both experimental results and COMSOL simulations demonstrated the remarkable anti-icing performance of PPTZC, with the longest ice delay time of 1291.4 s. Additionally, PPTZC can monitor head movements, finger bending, breathing, and pulse in real time, and be used for underwater information transmission and distress alerts. The multifunctional characteristics of PPTZC make it highly promising for use in low-temperature and underwater protective clothing, making it suitable for exploration and research in cold environments.
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JOURNAL OF CHROMATOGRAPHY A
·
2024
·
IF 3.8
Yanbo Tian,Abdul Majid,Yuewei Zhang,Liju Tan,Huiru Li,Na Wang,Jiangtao Wang
In this study, molecularly imprinted polymers (MIPs) were prepared for the specific recognition of organophosphorus pesticides and a rapid, efficient and simple method was established for the detection of dimethoate (DIT) in food samples. Fe 3 O 4 magnetic nanoparticles were synthesized by co-precipitation, and Fe 3 O 4 /ZIF-8 complexes were prepared by a modified in-situ polymerization method, and then magnetic molecularly imprinted polymers (MMIPs) were prepared and synthetic route was optimized by applying density functional theory (DFT). The morphological characterization showed that the MMIPs were coarse porous spheres with an average particle size of 50 nm. The synthesized materials are highly selective for the organophosphorus pesticide dimethoate with an adsorption capacity of 461.50 mg·g −1 and are effective resistance to matrix effects. A novel method for the determination of DIT in cabbage was developed using the prepared MMIPs in combination with HPLC. The practical results showed that the method can meet the requirements for the determination of DIT in cabbage with recoveries of 85.6–121.1 % and detection limits of 0.033 μg·kg −1 .
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ChemistrySelect
·
2025
·Vol. 10
·期 35
·e03319
·
IF 2
Simombela Mikunga,Chanez Maouche,Peter Phiri,Shuang Wang,Chao Cheng,Juan Yang
The development of cost-effective, high-performance oxygen reduction reaction (ORR) electrocatalysts is pivotal for advancing energy conversion technologies such as metal–air batteries and fuel cells. Herein, we report a facile and efficient strategy to synthesize Mn nanoparticles loaded on N-doped hierarchically porous carbon framework (Mn/N-C) through utilizing ZIF-8 as a carbon/nitrogen precursor and MnCl 2 ·4H 2 O as the Mn source. The synthesis integrates mechanical grinding with an NaCl-assisted pyrolysis process, where molten NaCl acts as a dynamic template and intercalation agent to prevent structural collapse during carbonization, thereby creating a 3D porous architecture with coexisting micro-, meso-, and macropores. Physicochemical characterization reveals that the Mn/N-C-2 sample exhibits a high specific surface area (1770 m 2 /g), abundant defects, and uniform dispersion of Mn nanoparticles within the N-doped carbon matrix. Electrochemical evaluations demonstrate that Mn/N-C-2 catalyst possesses a higher half-wave potential ( E 1/2 ) of 0.836 V and a larger limiting current density ( J L ) of 5.54 mA/cm 2 , surpassing other control samples and most reported Mn-based catalysts and comparable to that of commercial Pt/C. When integrated into Zn–air batteries (ZABs), Mn/N-C-2-based ZABs deliver an open-circuit voltage of 1.49 V and a peak power density of 150.51 mW/cm 2 , outperforming benchmark Pt/C-based counterparts. This work offers a cost-effective electrocatalyst for ORR and can be used instead of noble metals in ZABs. Graphical Mn/N-C electrocatalysts are fabricated by a NaCl-assisted pyrolysis strategy. The optimized Mn/N-C-2 catalyst exhibits a large specific surface area, hierarchically porous architecture and high content of active N, presenting an E 1/2 of 0.836 V for ORR. When integrated into ZABs, it delivers an open-circuit voltage of 1.49 V and a peak power density of 150.5 mW/cm 2 .
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BIOSENSORS & BIOELECTRONICS
·
2018
·
IF 8.173
Xue Hu,Xidong Liu,Xiaodan Zhang,Hongxiang Chai,Yuming Huang
The fluorescent CuNCs/ZIF-8 nanocomposites were facilely prepared by mixing the PEI protected CuNCs with the precursors of ZIF-8, and characterized by UV–vis absorption, fluorescence, FT-IR, TEM , XRD and XPS . The quantum yield of the CuNCs/ZIF-8 is 15 times that of the PEI-CuNCs. Furthermore, the CuNCs/ZIF-8 possesses better stability and higher fluorescence response due to protective and confinement effects of MOFs . It was found that H 2 O 2 could cause much more quenching of fluorescent CuNCs/ZIF-8 than that of PEI-CuNCs, which might result from enriching H 2 O 2 by ZIF-8. The CuNCs/ZIF-8 can be designed as a fluorescence probe to selectively and sensitively detect H 2 O 2 with a linear range from 0.01 to 1.5 µM and a LOD of 0.01 µM, while those with PEI-CuNCs are 0.5–30 µM and 0.50 µM, respectively. Through formation of CuNCs/ZIF-8 hybrid, the sensitivity for the detection of H 2 O 2 increases by nearly 50-fold, which makes CuNCs/ZIF-8 a desirable probe to detect H 2 O 2 content in human serum samples. Also, we successfully demonstrated the potential application of the CuNCs/ZIF-8 for screening and evaluating activities of oxidase using glucose oxidase as a model. The glucose oxidase activity can be detected in a range of 0.1–10 mU/L with a LOD of 0.1 mU/L.
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CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Mengge Shang,Xinen Zhang,Jing Zhang,Jinqiang Sun,Xinfu Zhao,Shimo Yu,Xiaochan Liu,Benxue Liu,Xibin Yi
Cellulose derived carbon aerogel (CA) with unique three-dimensional network coated with polyaniline (PANI) on its surface is used as a scaffolding framework to anchor ZIF-8. The designed ZIF-8 derived porous carbon (ZC)/PANI@CA (ZPCA) hybrid carbon composite through a facile solution immersion chemical route and subsequent carbonization process is employed as electrode for supercapacitor, which has contributed a large specific surface area, a hierarchical porous structure and reasonable N content (up to 6.27 at.%). The synthesized ZPCA electrode achieves an outstanding capacitance of 388 F g −1 at 0.5 A g −1 as well as an excellent cycling performance. More inspiringly, the symmetric supercapacitor based ZPCA achieves a high energy density of 13.4 Wh kg −1 at a power density of 250 W kg −1 using 2 M KOH aqueous solution, and an ultrahigh energy density of 81.8 Wh kg −1 at a power density of 950 W kg −1 is realized using Et 4 NBF 4 /AN electrolyte.
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JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Taotao Ji,Jiahui Yan,Yongfu He,Wenjing Hu,Yuan Peng,Weishen Yang,Yi Liu
Despite their huge potential in C 3 H 6 refinement, ZIF-8 membranes still struggle to achieve stable production of high-purity C 3 H 6 , owing to their fluctuant performances under changing operating conditions. In this study, a previous low-temperature synthetic protocol was further optimized to improve the microstructure of ZIF-8 membranes for pressure-resistent C 3 H 6 /C 3 H 8 separation through precisely regulating the reaction temperature between −15 °C and 5 °C. The elevation of reaction temperature gave rise to reduced grain boundary defects at the cost of increased membrane thickness. Of particular note, carrying out reaction between −2.5 °C and 2.5 °C assured an exact balance between upward intergrowth and inner penetration and thus, the formation of well-intergrown semi-confined ZIF-8 membrane featuring pressure-resistant C 3 H 6 /C 3 H 8 separation even at operating temperature as high as 125 °C. At feed pressure of 7 bar, our membrane remained a separation factor approaching 190 with C 3 H 6 permeance up to 2.9×10 -8 mol m -2 s -1 Pa -1 , thus demonstrating the best separation performance under similar test conditions. Moreover, our membrane could maintain a stable separation capacity at C 3 H 6 feed fraction of 1%–99%, which has never been addressed in previous literature. The above stable and outstanding separation performance recommend our membrane a superb choice for reliable batch production of high-purity C 3 H 6 .
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ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Hanchen Ye,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jinghui He,Jianmei Lu
The discharge of large amounts of sewage has caused enormous damage to the environment and human health. There is an urgent need for efficient and environmentally friendly materials to deal with such troubles. Materials with emulsion separation have attracted everyone’s attention. In this study, zeolitic imidazolate framework (ZIF)-8- and Co-polydimethylsiloxane (PDMS)-modified multiwalled carbon nanotube films were fabricated. First, the surface of the nanotube films was modified with ZIF-8 by in situ growth, and then a Co-PDMS layer was added by dip coating. The membrane has excellent wettability, and it is superhydrophobic and superoleophilic in air. The separation efficiency of water-in-oil emulsions reaches more than 99.9%, and it has an outstanding separation ability for corrosive emulsions. Moreover, the membrane has an excellent self-healing ability, and it can rapidly heal at normal temperature after being damaged. This makes the film more suitable for practical oily wastewater treatment. We performed related research and propose a possible self-healing mechanism.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Long Zhou,Na Li,Xiaoying Jin,Gary Owens,Zuliang Chen
A n Fe@ZIF-8 composite, which combined the tailorable porosity of ZIF-8 with the versatile functionality of Fe nanoparticles ( n Fe), was synthesized for Pb(II) removal. Batch adsorption experiments showed that more than 95.3% of Pb(II) was removed from aqueous solution at an initial concentration of 50 mg L −1 when using n Fe@ZIF-8 within 60 min at pH value of 5. The mechanism of Pb(II) removal was studied via characterization of changes the morphology, size and composition of in n Fe@ZIF-8 before and after exposure the solutions containing Pb(II). Specifically, Fourier transform infrared (FTIR) and X-ray powder diffraction (XRD) indicated that n Fe@ZIF-8 was successfully synthesized and also remained stable after Pb(II) removal. Transmission Electron Microscope (TEM) and Scanning electron microscopy-X-ray energy dispersive spectrometer (SEM-EDS) both confirmed that Pb(II) was partially adhered onto the surface of n Fe@ZIF-8, where X-ray photoelectron spectroscopy (XPS) specifically revealed the existence of Pb(0) on the surface. This indicated that Pb(II) was initially adsorbed onto the surface of n Fe@ZIF-8 and subsequently reduced to Pb(0). Moreover, Pb(II) removal fit well to kinetics of absorption and reduction. Finally, in practice, n Fe@ZIF-8 could remove 96.3% of Pb(II) from an electroplating wastewater.
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Canadian Journal of Chemistry
·
2022
·Vol. 100
·期 6
·
IF 1.051
Junyong Sun,Xian Liu,Like Chen,Lijun Peng,Xitian Peng,Tian Gan
Herein, polyvinylpyrrolidone-stabilized Au nanorods were controllably implanted into ZIF-8 to form a well-uniformed AuNRs@ZIF-8 electrocatalyst with a multicore-shell structure. After characterizing the chemical and physical properties, a novel electrochemical sensing platform was fabricated for 2-chlorophenol (2-CP) monitoring based on the AuNRs@ZIF-8 modified glassy carbon electrode. Due to the unique electrochemical property of AuNRs cores and ultra-porous architecture of ZIF-8 shell, the electrocatalyst would effectively accelerate the electron transfer and greatly improve the electrochemical response of 2-CP. Under the optimized experimental conditions, the oxidation peak current of 2-CP enhanced linearly with the increase of its concentration between 0.010 and 40 μM, and the limit of detection was 3.6 nM based on S/N = 3. Meanwhile, the prepared AuNRs@ZIF-8 electrode showed favorable stability, reproducibility, and selectivity, which could be applied to the accurate analysis of 2-CP in aquaculture with standard addition recovery ranging from 96.67% to 104.0%.
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Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 11
·3988-3996
·
IF 5.7
Shuo Guan,YunHao Ning,Hongda Chen,Beiju Huang,Bao Zhang,Chuantong Cheng
Crystal engineering based on the additive passivation of defects in perovskite crystals is vital for improving crystal quality and tuning the optoelectronic properties of perovskites. Doping metal–organic framework materials (MOFs) into halide perovskites is one of the emerging methods to improve the optoelectronic properties of perovskites. Herein, a simple and effective method to dope metal–organic framework nanoparticles into organic–inorganic halide perovskite MAPbI3 films is proposed. Zeolite imidazole framework-8 (ZIF-8) nanoparticles can be uniformly dispersed in MAPbI3 perovskite films. ZIF-8 nanoparticles can effectively passivate the defects in the MAPbI3 perovskite layer, and the crystalline quality of the perovskite films is improved after doping with ZIF-8. Meanwhile, planar conductive photodetectors and photodetector arrays were prepared with perovskite films. A two-fold increase was observed in the photocurrent and photoresponsivity of photodetectors doped with ZIF-8, and the detectivity reached 8.01 × 1011 Jones. The photodetectors maintained long-term operation and environmental stability and could run at 1.2 V bias for 230 s without attenuation, retaining 90% of the initial photoresponsivity after being stored at 30–35 °C (R.H. 40%) for 14 days. In addition, we prepared perovskite photodetector arrays. The prepared 10 × 10 photodetector array realizes the detection and signal transmission of image information.
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