MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Suqi Liu,Linjiang Pang,Xiaowei Wu,Shihao Chen,Mingyi Yang,Jiyu Cheng,Guoquan Lu,Zhenhe Wang,Wei Chen,Yuge Guan,Xinghua Lu
Changes in the content of trans -caryophyllene could identify whether sweetpotatoes are infected with black spot disease. Therefore, in this study, a quartz crystal microbalance (QCM) sensor based on modified CAU-1@ZIF-8 was used for non-destructive detection of sweetpotato black spot. The experimental results showed that the constructed sensor performed best when both modified CAU-1 and ZIF-8 were present. The sensor showed a linear trend (R 2 = 0.996, limit of detection (LOD) = 0.55 ppm) in response to trans -caryophyllene in the concentration range of 20–340 ppm with a sensitivity of −0.489 Hz (ppm) −1 . The developed gas sensor was successfully used for the detection of trans -caryophyllene in real samples of sweetpotato. The experimental data showed a significant correlation with the results of gas chromatography-mass spectrometry (GC–MS) with a correlation coefficient of 0.970 ( p < 0.01). Therefore, it could be used for early warning of black spot disease in sweetpotato.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zehan Zeng,Mingzhen Zhong,Tong Liao,Xuan Zhou,Lin Shi,Xin Zhang,Ye Zhang,Jingyan Feng,Yiqian Chen,Shuya Sheng,Jun Chen,Lei Zheng,Weilun Pan,Jinxiang Chen
Plasma extracellular vesicles (EVs) have emerged as promising biomarkers for the early diagnosis of glioblastoma. However, rapid and efficient isolation and detection of tumor-specific EV subsets from plasma remains challenging. To address this, we developed an innovative integrated chip based on self-sacrificial metal–organic frameworks and the epidermal growth factor receptor (EGFR) aptamers called ZIF-8@EGFR aptamer (ZIF-8@Apt), which further coupled with a “nano-fuels”-driven DNAzyme amplification strategy. The core functionality of the constructed chip lies in its ability to capture EVs with the ZIF-8@Apt module. Once captured, numerous DNA “nano-fuel” structures are in situ assembled on the EVs’ surfaces. Subsequently, the ZIF-8@Apt@EV@nano-fuels composites are lysed to release Zn 2+ , the EVs’ nucleic acids, and additional nano-fuels for subsequent detection. Finally, a DNAzyme detection system is introduced, where the released nano-fuels activate the DNAzyme, leading to multiple signal amplification aided by Zn 2+ for highly sensitive detection of plasma EVs. This integrated approach effectively enriches and detects target EVs, achieving a significantly enhanced detection sensitivity of 500 particles/μL. In a clinical study involving glioblastoma patients, our chip demonstrated a remarkable ability to distinguish between cancer patients and healthy individuals, achieving an area under the curve (AUC) of 0.958. Moreover, the response signals of the chip can be conveniently read using fluorescence spectroscopy or microscope, offering a rapid, highly sensitive, and high-throughput analysis of plasma EVs for various application scenarios. Overall, this study introduces a comprehensive approach for the rapid isolation and accurate analysis of plasma EVs, holding significant promise for early diagnosis and disease monitoring.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yun Tang,Jingqi Ruan,Yalou Xin,Xiaohu Ren,Hudie Yuan,Xianhu Liu,Qiang Chen
The development of metal–organic frameworks (MOFs)-derived magnetic carbon-based materials for high-efficiency electromagnetic wave (EMW) absorption has attracted widespread attention. While these MOFs-derived composites have shown exceptional performance in absorbing EMWs within the X and Ku bands, the pursuit of effective absorption at lower frequencies remains a challenge. Herein, we demonstrate a novel strategy to synthesize hollow Co@C/C rods with excellent C-band EMW absorption via acetic acid etching and pyrolysis of core–shell ZIF-8@ZIF-67. Based on acetic acid etching, ligand-deficient ZIF-8@ZIF-67 rods with abundant mesoporous structures are constructed, enabling precise control over the Co nanoparticles content, graphitization degree, and pyridinic N doping in the derived Co@C/C. This simple fine-tuning approach simultaneously reduces dipole polarization by lowering the pyridinic N doping concentration, suppresses interfacial polarization and conduction loss through reducing the number of graphitic carbon layer, and enhances magnetic loss by increasing the Co content. These combined effects collectively improve the impedance matching of Co@C/C for low-frequency absorption. Notably, as the volume of acetic acid solution increases, the absorption frequency band of Co@C/C gradually shifts from the Ku-band to the C-band, while sustaining superior EMW absorption performance. At the filling ratio of merely 11 %, the RL min values for Co@C/C-20 and Co@C/C-30 achieve −49.8 dB and −34.7 dB at 7.2 GHz and 6.8 GHz, respectively. This study offers a valuable approach to the development of lightweight materials with excellent EMW absorption in C-band.
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高影响因子
MOLECULES
·
2024
·Vol. 29
·期 18
·4465
·
IF 4.2
Yun Xiong,Yifan Shu,Niyan Deng,Xiaogang Luo,Shengpeng Liu,Xiaoyu Wu
This study investigated the enhancement in bioethanol recovery from mixed matrix membranes (MMMs) by functionalizing zeolite framework-8 (ZIF-8) with imidazolate. This study focused on the separation of ethanol from low-concentration ethanol/water mixtures (typical post-fermentation concentrations of 5–10 wt%). Specifically, ZIF-8 was modified by the shell–ligand exchange reaction (SLER) with 5,6-dimethylbenzimidazole (DMBIM), resulting in ZIF-8-DMBIM particles with improved hydrophobicity, organophilicity, larger size, and adjustable pore size. These particles were incorporated into a PEBAX 2533 matrix to produce ZIF-8-DMBIM/PEBAX MMMs using a dilution blending method. The resulting membranes showed significant performance enhancement: 8 wt% ZIF-8-DMBIM loading achieved a total flux of 308 g/m2·h and a separation factor of 16.03, which was a 36.8% increase in flux and 176.4% increase in separation factor compared with the original PEBAX membrane. In addition, performance remained stable during a 130 h cycling test. These improvements are attributed to the enhanced compatibility and dispersion of ZIF-8-DMBIM in the PEBAX matrix. In conclusion, the evaluation of nanofiller content, feed concentration, operating temperature, and membrane stability confirmed that ZIF-8-DMBIM/PEBAX MMM is ideal for ethanol recovery in primary bioethanol concentration processes.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Huiqi Gao,Haiyun Ma,Jinjin Cui,Xusheng Ge,Jiajun Tan,Jianzhong Xu
Organic phase change materials (PCMs) suffer from liquid-phase leakage, insufficient solar-thermal conversion capability, inherent flammability, which severely hinders their utilization. Herein, we design a three-dimensional hierarchically porous aerogel composite PCMs that integrates hollow phosphorus-doped ZIF-8 microshells (P-ZIF-8) with chitosan (CS) and MXene nanosheets for multifunctional synergy. Specifically, the hierarchically porous aerogel exhibits exceptional mechanical strength (withstanding >5000 times its own weight), endowing the composite PCMs with superior shape stability. This hierarchical framework, comprising aerogel network and hollow P-ZIF-8 microshells, provides a dual encapsulation effect and achieves outstanding encapsulation capability (97.6 %) and latent heat storage density (190.0 J/g), maintaining thermal durability and stability over 200 heating-cooling cycles. The MXene and P-ZIF-8 microshells synergistically enhance solar-thermal harvesting and energy conversion in composite PCMs, achieving a solar-thermal conversion efficiency of 98.3 % and outputting 442.1 mV and 69.1 mA in a solar-thermal-electric generator under 500 mW/cm 2 . The P-ZIF-8 microshells and MXene both provide physical barriers and catalytic charring effect, markedly enhancing the flame retardancy of the composite PCMs with peak heat release rate (pHRR) and total heat release (THR) significantly reduced by 31.1 % and 17.1 %, respectively. This work offers a versatile pathway for multifunctional PCMs that simultaneously meet the needs of thermal energy storage, solar harvesting and fire safety.
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JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Jinhuai Hua,Rui Yao,Haonan Xu,Wenbin Zhao,Yuping Zhou,Hua Jin,Yanshuo Li
This study addresses the challenges of bio-butanol recovery by synergizing innovative module design with advanced mixed matrix membranes (MMMs) for enhanced pervaporation (PV) efficiency. ZIF-8 nanoparticles (14–120 nm) were integrated into a polymethylphenylsiloxane (PMPS) matrix to fabricate ZIF-8/PMPS MMMs on flat-sheet Al 2 O 3 supports, for efficient n-butanol separation via pervaporation. The optimized 14 nm-ZIF-8/PMPS MMMs (13.0 wt% loading) exhibited optimal performance, achieving a total flux of 925.86 g m −2 h −1 and a separation factor of 37.65 for 1 wt% n-butanol/water mixtures at 40 °C, enabling stable operation over 600 h. Key factors included the improved hydrophobicity, reduced interfacial voids, and enhanced surface roughness. A novel plate-and-frame module was engineered to address scalability challenges, increasing packing density from 5 to 55 m 2 /m 3 while mitigating concentration polarization and enhancing mass transfer under dynamic flow conditions. The module's compact design, combined with the mechanical robustness of Al 2 O 3 supports and the compatibility of ZIF-8/PMPS membranes, demonstrates industrial viability.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Mengshi Chen,Zihan Kang,Jingjing Ning,Ni Qin,Dinghua Bao
A novel method was established to create ZnO/ZIF-8 core/shell heterostructured film piezo-photocatalysts for highly efficient removal of pollutants from water. This method was inspired by distinctive pore structure of ZIF-8 and has the advantage of simple and quick synthesis. In this work, ZnO/ZIF-8 heterostructure thin films were created by growing ZIF-8 metal organic framework in-situ on inverse opal structure ZnO films, which also served as the porous template and zinc source of ZIF-8 simultaneously. Thus, the ZnO/ZIF-8 core/shell heterostructure is composed of ZnO core and ZIF-8 shell. The inverse opal structure enhances the process of light absorption, and the heterostructure is crucial for enhancing the carrier concentration. The ZnO/ZIF-8 heterostructure films exhibit significant degradation capacity towards Rhodamine B (RhB) and tetracycline (TC). Under UV light and ultrasound, the degradation efficiency of ZnO/ZIF-8 heterostructure is much higher than that of ZnO film and ZIF-8 film for RhB solution, indicating that the heterostructure films have a great potential for use in the field of water pollution prevention. This study not only presents an effective method for quickly creating heterostructures, but also demonstrates a path for improving the piezo-photocatalytic efficiency by manipulating the morphology and structure of ZnO/ZIF-8.
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yao Liu,Runzi Zhang,Xiaoyu Yang,Yi He,Xiao Yang
Herein, a dual-enhanced SERS biosensor has been developed for the detection of bisphenol S (BPS) based on silver nanoflowers coated zeolitic imidazolate-based metal-organic framework (AgNFs@ZIF-8) cooperate with host-guest recognition amplification technology. The biosensor utilizes the molecularly imprinted polymer (MIP) and BPS aptamer chain (APT) as dual recognition element to achieve a significant increase in selectivity. In the presence of the target, the APT on AgNFs@ZIF-8@β-cyclodextrin(β-CD) specifically binds with BPS, which further recognized by MIP to form a sandwich structure. At this time, due to the large surface area, and stable Raman enhancement ability, AgNFs@ZIF-8@β-CD could not only provide multiple active “hot spots” as the surface-enhanced Raman scattering (SERS) enhanced substrate, but also specific capture large number of methylene blue (MB, SERS tag) through the host-guest recognition. Moreover, multiple host-guest recognition can be achieved by further addition of AgNFs@ZIF-8@β-CD and MB, which greatly improve the detection sensitivity. This SERS sensor, characterized by an extensive linear detection range from 1.00 × 10 −13 to 1.00 × 10 −6 M and an exceptionally low limit of detection (LOD) of 1.36 × 10 −14 M, has been effectively utilized for the detection of BPS in plastic pacifiers, receipts, and river water samples. As an extremely sensitive and highly specific analytical method for detecting BPS, this SERS-based method has promising applications in the fields of environmental monitoring and food safety.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qian Wang,Xinyuan Zheng,Meiling Ge,Rong Chen,Fangpei Ma,Jianming Pan,Fu Yang
Maintaining the long-term stability of flexible polymer-immobilized lipase remains a significant challenge in enzyme catalysis. The deformation of the polymer during the process often damages the lipase, severely limiting its practical application. In this work, we in situ constructed rigid Zeolitic Imidazolate Framework-8 (ZIF-8) in porous hydrophobic polymer PVIm as “rigid and flexible” composite PVIm/ZIF-8 through a self-assemble strategy. The implanted rigid ZIF-8 improves the network stability of the hydrophobic polymer PVIm. Additionally, it acts as a co-factor, leveraging defective Zn sites to immobilize lipase through bonding with its amino acid moieties. This approach represents a typical two-birds-with-one-stone strategy. The optimal biocatalyst CalA@PVIm/ZIF-8(0.3) affords the highest yield of biodiesel of 82 % with a TON of 136.6 g (biodiesel) /g (CalA) from waste cooking oil under 30 °C and 24 h. Compared to CalA@PVIm/ZIF-8(0.3), the TON of free CalA is only 25 % of that value. Compared to the ZIF-8-free CalA@PVIm, CalA@PVIm/ZIF-8(0.3) exhibits near 1.2 folds enhancement of performance, further unveiling the co-factor role of ZIF-8 in the reaction. More importantly, this incorporation of ZIF-8 makes the resulted CalA@PVIm/ZIF-8(0.3) afford at least 44 days operation period and retains 83 % original activity after 16 running recycles, superior to almost all the reported immobilized lipase researches, far outperforming that (24.1 % activity after 16 cycles) of CalA@PVIm. The wide flexibility in various biodiesel synthesis can be further demonstrated, affording the practical application value of developed catalyst.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Peipei Song,Zhirui Fan,Shuai Sun,Chengye Sun,Jun Wang
In recent years, lead (Pb) contaminated soil has caused irreversible damage to human beings. It is urgent to develop a novel technology for accurate detection of Pb in the soil solution. Herein, a new electrochemical sensor was fabricated. Fe/ZIF-8 was used as the modification material, gold nanoparticles (AuNPs) were electrodeposited, and DNAzyme was applied on the surface as the probe. Under the optimum conditions (DNAzyme concentration of 1 μmol, fixation time of 4 min, incubation time of 17 h and reaction time of 30 min), the detection range was 5×10 −12 ∼ 5×10 −5 M, and the minimum detection limit was 10 −13 M (3δ). Furthermore, the electrochemical sensor demonstrated outstanding anti-interference ability to common cations, anions, organic compounds and other interference factors. After four consecutive tests, the relative standard deviation (RSD) was only 0.39%, and it still displayed excellent reproducibility with 0.69% of RSD. After 20 days, the sensor’s response to Pb 2+ remained at 93.58%. In addition, the sensor could accurately detect Pb 2+ in the actual soil solutions, and the recoveries of the samples ranged from 92% to 109.4%. In conclusion, this electrochemical sensor can specifically detect Pb 2+ in the soil solution with enhanced sensitivity, anti-interference capability and stability, which is of great significance for Pb 2+ detection in the field.
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Guangli Li,Yafeng Zhang,Rui Zhu,Zian Liu,Yuan Jin,Nanke Ma,Xuliang He
The indiscriminate use and excessive consumption of ciprofloxacin (CIP) may induce adverse effects in both humans and animals, while concurrently contributing to environmental contamination. Hence, there is an urgent demand to establish highly efficient detection methods for trace ciprofloxacin residues. Herein, a highly efficient electrochemical sensor based on ZIF-8 metal-organic framework (MOF)-derived N-containing porous carbon-supported Fe 3 O 4 nanoparticles (Fe 3 O 4 /NPC) was fabricated for the sensitive determination of CIP residues in milk and honey. Due to the synergistic interaction between Fe 3 O 4 NPs and NPC, the composite exhibited large specific surface area, high conductivity, and abundant internal catalytic sites, effectively improving the voltammetric response of CIP. As a result, the Fe 3 O 4 /NPC demonstrated significant electrocatalytic activity for CIP oxidation, with two wide linear response ranges (0.01–1.0 μM and 1.0–10 μM), high sensitivity (3.312 and 0.8574 μM μA −1 ), and a low limit of detection (0.002 μM). The Fe 3 O 4 /NPC/GCE showed strong anti-interfering capabilities even in excess potential interference substances, and could operate stably for at least one month (with a current retention rate of 81.9 %). Moreover, the Fe 3 O 4 /NPC/GCE was successfully applied to the determination of CIP in milk and honey, achieving satisfactory recovery (95.2 %–103.8 %). Considering its significant advantages such as cost-effectiveness, ease of operation, and excellent sensing properties, the Fe 3 O 4 /NPC has broad application prospects on sensitive detection CIP residues at trace level.
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高影响因子
ACS Sensors
·
2026
·
IF 9.1
Shaorui Qi,Lei Sun,Fansheng Meng,Guimei Shi,Yunlong Sun,Bo Jiang,Junbo Li,Yukihiro Ozaki,Wei Ji
Abnormal lactic acid (LA) enantiomeric excess (ee) in biofluids is closely associated with various intestinal diseases. Here, we report a chiral-label-free nonplasmonic surface-enhanced Raman scattering (SERS) platform using a ZIF-8/ZnS heterojunction that enables direct quantification of LA enantiomers and their ee values in raw human urine through a charge-transfer-driven chiral recognition mechanism. Our findings indicate that an enantioselective hydrogen bonding between 4-mercaptopyridine (4-MPy) probes and LA enantiomers induces differential charge-transfer effects within the ZIF-8/ZnS@4-MPy system, evidenced by the selective enhancement of specific vibrational modes in the SERS spectra of 4-MPy and enantiomer-specific changes in the fluorescence lifetime of ZnS. This innovative system integrates signal amplification and stereoselectivity without the use of noble metals or chiral modifiers, overcoming critical limitations associated with the complexity of preparing chiral plasmonic substrates. The platform achieves ultrasensitive detection limits (10 nM), linear response to ee values (R2 = 0.98), high measurement precision (RSD < 8.28%, n = 20), long-term stability (28-day), and clinical-grade accuracy against enzymatic assays (RMSEP = 1.97). This work presents an efficient, noninvasive method for the analysis of chiral metabolites in urine, while establishing a novel direction for plasmon-free SERS chiral sensing.
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PubMed
高影响因子
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