SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Yumin Chen,Weiwei Cheng,Yuling Yang,Di Wu,Yan Zhang,Xiaozhi Tang
A versatile Surface-enhanced Raman Spectroscopy (SERS) aptasensor was fabricated for ultrasensitive and stable aflatoxin B1 (AFB1) detection using complementary DNA strands (cDNA) modified Fe 3 O 4 @UiO-66-NH 2 as capture probe and aptamer modified Au@ 4-MBA@AgNPs as signal probe . The surface of the Fe 3 O 4 beads was functionalized with UiO-66-NH 2 to improve the surface area and content of reactive amino groups for stable immobilization of cDNA and capture of more signal probes. Raman tag (4-mercaptobenzoic acid, 4-MBA) embedded Au@AgNPs nanoparticles (Au@4-MBA@AgNPs) was used as signal probes to achieve strong SERS intensity and protect the tag molecules from external interference. When no AFB1 existed, a strong SERS intensity of the signal probe was observed due to the DNA hybridization reaction between the capture and signal probe. While, the addition of AFB1 led to the dissociation of signal probes from the capture probes, leading to a decreased Raman intensity . As a result, a low limit of detection of 1.47 × 10 −7 ng/mL and wide linear range from 10 −6 to 10 2 ng/mL were obtained for determination of AFB1 based on the fabricated aptasensor. Moreover, an excellent selectivity and desirable recoveries from 94.3 % to 103.3 % in real maize samples were obtained, demonstrating the fabricated SERS aptasensor is promising in practical applications.
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高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Xiaohai Yan,Yahong Yuan,Tianli Yue
Patulin (PAT) is a potentially harmful mycotoxin to human health and is known to contaminate apple juice. In this work, we developed a ratiometric fluorescence aptasensor using tetrakis(4-carboxyphenyl)porphyrin (H 2 TCPP)-treated octahedral UiO-66-NH 2 (defined as UiO-66-TCPP) to detect PAT. This 2-aminoterephthalic acid and H 2 TCPP functionalized metal-organic framework showed multiple adsorption effects (hydrogen bonding and π–π stacking) on the aptamer (Apt) and served as a quenching material. When the target PAT bound specifically to the Apt, the fluorescence of the 6-carboxyfluorescein-labeled Apt would recover, and the fluorescence of the H 2 TCPP ligand remained unchanged. This ratiometric fluorescence property improved the accuracy of PAT detection. Moreover, the introduction of the H 2 TCPP ligand enhanced the quenching efficiency of UiO-66-NH 2 , thus improving the sensitivity of the fluorescent aptasensor (UiO-66-TCPP vs. UiO-66-NH 2 : 0.0162 ng/mL vs. 1.8 ng/mL). In addition, we used UiO-66-TCPP to detect PAT in apple juice samples. This work provides a good paradigm for the construction of ratiometric fluorescence aptasensors with high sensitivity and accuracy.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
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IF 6.7
Jiaqian Zhang,Jinjuan Xue,Zhenbo Wu,Mingxin Wang,Yiting Lv,Zhaoxia Chen,Shuaishuai Ma
In this work, we fabricated a multifunctional membrane by in-situ growth of tetrakis (4-carboxyphenyl) porphyrin-doped UiO-66-NH 2 on stainless steel mesh (SSM), denoted as TCPP/UiO@SSM, for gravity-driven oil–water/seawater mixtures separation and visible-light-driven bacterial inactivation. The as-prepared membrane exhibited high permeation flux (up to 46312 ± 1583 L m −2 h −1 ) as well as separation efficiency (above 98%) towards various oil–water/seawater mixtures separation, which resulted from the rough hierarchical structure and the inherent super-wettability. In particular, the membrane can effectively deal with viscous oil fouling to achieve a desired flux recovery ratio (FRR) after separating crude oil from water, attributing to the self-cleaning property originated from the photo-active TCPP/UiO. Furthermore, the as-fabricated TCPP/UiO@SSM has the ability to efficiently inactivate typical Gram bacteria (6 log units) in water under visible light . Both the oil–water separation and photocatalytic sterilization performances of TCPP/UiO@SSM are superior to UiO@SSM. The doping of photosensitive TCPP in UiO-66-NH 2 not only improved the hydrophilicity, but also enhanced the photocatalytic activity by creating a Z-scheme heterojunction to promote the separation of charge carriers and amplify the photothermal effect. This work provides a new platform for water disinfection and the treatment of oily wastewater containing viscous oil phase based on UiO metal–organic framework.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
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IF 5.2
Yan Fan,Xueqin Sun,Wenyuan Zhang,Jiacheng Liu
A novel fluorescent sensor material of Eu 3+ @ Citric acid-functionalized UiO-66 (denoted as Eu 3+ @UiO-66-CA) was prepared successfully via a two-step post synthetic modification towards UiO-66. The as-obtained Eu 3+ @UiO-66-CA presented the characteristic emission of Eu 3+ ions (λ ex = 270 nm), which could be used for rapidly detecting Fe 3+ and Cr 2 O 7 2- ions by luminescence quenching in aqueous solution. The detection process for Fe 3+ ion (detection limit, 18.1 μ M) and Cr 2 O 7 2- ion (detection limit, 8.5 μ M) exhibited the high selectivity and excellent anti-interference ability. Systematic investigations were employed to make clear the mechanism of fluorescence quenching after adding Fe 3+ and Cr 2 O 7 2- ions. Moreover, the Eu 3+ @UiO-66-CA was also used for the determination of Fe 3+ and Cr 2 O 7 2- ions in the Yellow River and tap water.
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高影响因子
JOURNAL OF SEPARATION SCIENCE
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2019
·Vol. 42
·期 16
·2679-2686
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IF 2.516
Weixuan Yao,Zhefeng Fan,Suling Zhang
A zirconium terephthalate metal-organic framework-incorporated poly( N -vinylcarbazole- co -divinylbenzene) monolith was fabricated in a capillary by a thermal polymerization method. The optimized monolith had a homogeneous structure, good permeability, and stability. The monolith could be used for the effective enrichment of fungicides through π-π interactions, electrostatic forces, and hydrogen bonds. The potential factors that affect the extraction efficiency, including ionic strength, solution pH, sample volume, and eluent volume, were investigated in detail. The monolith-based in-tube solid-phase microextraction coupled with ultra-high-performance liquid chromatography and high-resolution Orbitrap mass spectrometry was performed for the analysis of five fungicides (pyrimethanil, tebuconazole, hexaconazole, diniconazole, and flutriafol) in environmental samples. Under the optimized conditions, the linear ranges were 0.005–5 ng/mL for pyrimethanil, 0.01–5 ng/mL for flutriafol, and 0.05–5 ng/mL for other fungicides, respectively, with coefficients of determination ≥0.9911. The limits of detection were 1.34–14.8 ng/L. The columns showed good repeatability (relative standard deviations ≤9.3%, n = 5) and desirable column-to-column reproducibility (relative standard deviations 5.3–9.4%, n = 5). The proposed method was successfully applied for the simultaneous detection of five fungicides in water and soil samples, with recoveries of 90.4–97.5 and 84.0–95.3%, respectively.
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高影响因子
Journal of Environmental Chemical Engineering
·
2016
·
IF 0
Fang Wang,Yong Tao Zhang,Yanli Xu,Xing Wang,Sunfeng Li,Hanbiao Yang,Xueting Liu,Fengyu Wei
N-K 2 Ti 4 O 9 /g-C 3 N 4 /UiO-66 ternary composites were successfully synthesized by a solvothermal method, and were characterized by powder X-ray diffraction, UV–vis diffuse reflectance spectroscopy, the valence band X-ray photoelectron spectroscopy, field emission transmission electron microscopy , photoluminescence emission spectra and N 2 adsorption-desorption. Photocatalytic activities of N-K 2 Ti 4 O 9 , g-C 3 N 4 , UiO-66, N-K 2 Ti 4 O 9 /g-C 3 N 4 binary composites and the ternary composites were investigated by the degradation of Rhodamine B (RhB) under visible light irradiation. The results show that the ternary composites exhibit higher photocatalytic activity as compared with the binary composites and the pure materials. The synergistically enhanced photocatalytic activity of the ternary composites is due to coupling direct solid-state Z-scheme N-K 2 Ti 4 O 9 /g-C 3 N 4 heterojunction with high adsorption capacity of UiO-66 for RhB.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Wenqi Zhao,Yue Qiao,Hang Jia,Yu Zhang,Enmao Zhang,Xigao Jian,Cheng Liu
The interfacial bonding between carbon fiber (CF) and the matrix in carbon fiber-reinforced high-performance thermoplastic (CFRHPTP) composites is weak, owing to the chemical inertness of the CF surface and nonreactivity of the thermoplastic resin. Hence, the applications of these composites are severely limited. In this study, a 2D GO/3D NH 2 -UiO-66 nanohybrid coating was hierarchically assembled via a two-step method. First, GO was assembled on CF (G-CF) via electrophoretic deposition to provide nucleation sites, and the NH 2 -UiO-66 was assembled in situ on the G-CF surface to obtain modified CF (G-N-CF) via electrochemical deposition. The chemical compositions, surface morphologies, and wettabilities of the CFs were systematically analyzed. Using poly(bisphthalazinone ether sulfone ketone) (PBPESK) as a matrix, a series of CF/PBPESK composites were prepared using G-N-CF, G-CF, and D-CF. The flexural strength and interlaminar shear strength of the G-N-CF-2/PBPESK composite increased by 28.5% and 48.3%, respectively, compared with those of the D-CF/PBPESK composite. The interfacial failure mechanism changed from adhesive failure to cohesive failure after treating CF with the 2D GO/3D NH 2 -UiO-66 nanohybrid coating. This study provides an effective strategy for the interphase design of CFRHPTP composites based on multiple physical and chemical interactions.
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高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Fajie Hu,Danfeng Zhao,Rushuo Li,Yunqi Zhang,Tianyu Zhang,Xiubing Huang,Ge Wang
The hierarchical porous and chemical microenvironmental properties of Metal–Organic Frameworks (MOFs) have been emphasized in catalytic applications. In this work, after selectively removing ligands from frameworks of Ce-UiO-66 by monocarboxylic acid etching, they exhibit obvious mesoporous properties with essentially unchanged crystallinity. Distinguishing from other pore-making methods, the MOFs have abundant missing sites after etching, and Ni nanoparticles (NPs) can be efficiently anchored in the framework of defective Ce-UiO-66, resulting in the formation of Ce–O–Ni heterogeneous interfaces. The chemical environments of Ni NPs can be modulated through the Ce–O–Ni interfaces, and the metal–support interaction improves the charge densities between the active sites. The prepared catalysts showed high conversion and selectivity in the hydrogenation reaction of dicyclopentadiene, and also had good cycling performance. The present work provides new insights into the construction of hierarchical porous defective MOFs with abundant heterogeneous interfaces for hydrogenation reactions.
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高影响因子
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
·
2025
·
IF 3.8
Kaiqiang Wang,Xiaoyan Duan,Ye Tian,Hong Lin,Limin Cao,Jianxin Sui
In this work, a novel method for sensitive detecting heavy metal Pb (II) in aquatic products was developed using UiO-66-NH 2 @tannic acid (UiO-66-NH 2 @TA) solid-phase extraction combined with laser-induced breakdown spectroscopy (LIBS). UiO-66-NH 2 @TA adsorbent could effectively extract Pb (II) from the digestive solution of aquatic products. Characterization of the morphology of the adsorbent was performed using transmission electron microscopy and scanning electron microscopy. The optimal experimental conditions for LIBS detection, including sample preparation, substrate type, laser energy, and delay time, were investigated. The results showed that the strongest Pb I 405.7 nm spectral signal can be obtained by dripping UiO-66-NH 2 @TA adsorbent onto a silicon wafer for LIBS testing. The limit of detection and limit of quantification for Pb (II) in aqueous solution were 0.18 μg/mL and 0.61 μg/mL, respectively. The calibration curve demonstrated good sensitivity and accuracy for Pb (II) detection with a correlation coefficient of 0.9905. Spiked recovery experiments on large yellow croakers and scallops yielded recovery rates of 75.25 % - 99.08 %, which was consistent with the results from atomic absorption spectrometry. This study underscores the potential of the solid-phase extraction combined with laser-induced breakdown spectroscopy for practical application in food safety monitoring, demonstrating its effectiveness and reliability in detecting Pb (II) in aquatic products.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Qingmei Qiao,Yunlan Xu,Dengjie Zhong,Xihong Ke,Yuqin Yang,Hanlu Zeng
In order to enhance the carrier separation efficiency and redox ability of photoanode, a dual Z-scheme heterojunction Ce-UiO-66/g-C 3 N 4 /Bi 2 WO 6 /Ti photoanode was prepared and assembled with Cu cathode to form PFC. The characterization results show that Ce-UiO-66/g-C 3 N 4 /Bi 2 WO 6 uniformly distributed on the Ti substrate, with average crystallite size of 9.04 nm and average particle size of 33.05 nm, which provides sufficient reactive active sites for RhB degradation. The RhB degradation rate, P max , J sc , V oc and FF of the PFC were 90.9 % (90 min), 7.53 µW cm -2 , 0.152 mA cm -2 , 0.37 V and 0.134, respectively. The turnover frequency (TOF) for RhB degradation by the PFC reached 0.98 h -1 . Fermi energy level analysis shows that a double-Z heterojunction is formed between Bi 2 WO 6 and g-C 3 N 4 , and between Bi 2 WO 6 and Ce-UiO-66, which not only effectively separates photogenerated e - - h + , but also retains the high redox ability of the composite. Moreover, with the introduction of Ce-UiO-66, the composite photoanode has larger specific surface area and wider visible light absorption range. In addition, because of the built-in electric field, the photogenerated electrons can migrate to the surface of composite particles more easily and react with dissolved oxygen to generate more •O 2 - to participate in the degradation of RhB. This work provides a valuable reference for developing PFC photoanode with high efficiency and visible light response.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yuxin Yuan,Quanlan Liao,Tianxiang Zhao
Metal-organic frameworks (MOFs) have been hybridized with other functional materials, such as ionic liquids, covalent organic frameworks (COFs), and metallic nanoclusters, to fabricate composite materials. These composites possess the structural characteristics of their individual components and exhibit synergistic properties. In this work, we demonstrate the synthesis of core-shell structure UiO-66-NH 2 @PILs-x composite materials by encapsulating MOFs within ionic polymers (PILs) with varying thicknesses of PILs shell. These hybrid materials serve as bifunctional catalysts for the conversion of CO 2 into cyclic carbonates under solvent- and additive-free conditions through a synergistic catalytic effect facilitating the conversion of CO 2 into cyclic carbonates under solvent- and additive-free conditions through synergistic catalytic effect, exhibiting superior catalytic performance and excellent recyclability. This MOFs-based composite material provides a competitive approach for CO 2 catalytic conversion.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Mengyao Hua,Siyi Wang,Meng Cheng,Guangming Liang,Yafen Zhou,Lei Xu,Guofang Zhang
Photocatalysts UiO-66-(OH) 2 /MnO 2 -TiO 2 with intimate contact interfaces were successfully synthesized by impregnation methods and all of the composites were characterized by a variety of analytical techniques. The results indicated that MnO 2 and TiO 2 form a heterojunction and tightly attached to the surface of UiO-66-(OH) 2 , the generation of MnO 2 -TiO 2 heterojunction improved the catalyst electron-hole separation efficiency, and there was a strong electronic interaction between MnO 2 -TiO 2 and UiO-66-(OH) 2 in the composite. The synergistic combination of high adsorption capacity of UiO-66-(OH) 2 , and efficient interfacial charge transfer between UiO-66-(OH) 2 and MnO 2 -TiO 2 have a significant impact on the enhanced photocatalytic performance for formaldehyde removal. Meanwhile, the hydroxyl radicals (·OH) and superoxide radicals (·O 2 - ) also play a major role in removal of formaldehyde. The formaldehyde removal rate of 70UO/MnO 2 -TiO 2 (1 g 0.15 m 3 ) in self-made closed system under high pressure mercury lamp irradiation is 88.19 % within 5.5 h, if the removal time is extended to 24 h, the formaldehyde removal rate can reach 95.19 %, and the continuous photocatalytic reaction showed that the composite is a highly stable catalyst.
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高影响因子
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