LWT-FOOD SCIENCE AND TECHNOLOGY
·
2025
·
IF 6.6
Lanqing Yang,Qiuya Li,Baoqing Bai,Tao Bo,Ligang Yu,Xu Jing,Shu Qin,Huilin Liu,Ying Zhang,Yukun Yang
Aflatoxin B1 (AFB1), a highly toxic mycotoxin prevalent in agricultural products, poses severe health threats. Addressing the critical need to mitigate AFB1-induced food safety risks, the primary objective of this study was to develop an accurate and ultrasensitive colorimetric/electrochemical (CL/EC) dual-mode aptasensor for AFB1 detection. To achieve this aim, we employed 3,3′,5,5′-tetramethylbenzidine (TMB) as a dual-function indicator. The catalytic oxidation of TMB generated oxidized oxTMB, concurrently producing colorimetric and electrochemical signal. Central to realizing the sensor's dual functionality, BSA@HOF-101 nano-enzymes were generated by in situ encapsulation of bovine serum albumin (BSA) in hydrogen-bonded organic frameworks (HOFs), which were indispensable enzyme mediators for the dual function of TMB. To specifically detect AFB1, BSA@HOF-101 was coupled with aptamer (Apt). The CL/EC dual-mode aptamer sensor offered detection of AFB1 across a concentration range from 10 −11 to 10 −7 g/mL. In addition, the sensor was successfully applied to the detection of AFB1 in corn and peanut samples with recoveries as high as 97.4 %–104.0 %. Collectively, this work established a robust analytical strategy with a dual-mode readout, providing a promising solution for the rapid and precise on-site monitoring of AFB1 contamination.
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高影响因子
CATALYSIS LETTERS
·
2025
·Vol. 155
·期 10
·1-13
·
IF 2.4
Chen Shiqi,Huang Zhixuan,He Wentao,Wang Xinyu,Yang Zhiwei,Zhang Jing
Molybdenum nitride, because of the strong metal-support interaction between nitrogen and the metal, exhibits activity superior to that of bare metals, demonstrating its effectiveness as a co-catalyst to address the slow kinetics of the iron reduction in the Fenton process. Here, we introduced Mo 2 N as a co-catalyst to accelerate the cycles of Fe 3+ /Fe 2+ within a Fenton-like system consisting of Fe 3+ and H 2 O 2 , thereby enhancing the activation of hydrogen peroxide to generate reactive oxygen species (ROS). The system demonstrates excellent recyclability and stability. XPS spectroscopic analyses reveal that Mo(III) and Mo(IV) species on the Mo 2 N surface are capable of reducing free Fe(III), while FTIR analyses show nitrogen (N) and nitrogen oxide (NO x ) facilitate the adsorption and coordination of iron. Both homogeneous and heterogeneous reduced iron species are active in the activation of H 2 O 2 . EPR spectroscopy further confirms that the primary ROS generated are hydroxyl radicals (·OH) and superoxide anions (·O 2 − ). This study not only underscores the feasibility of Mo 2 N-based Fenton-like systems but also provides a new strategy for promoting the practical application of Fenton chemistry. Graphical
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Siwei Wang,Fusheng Pan,Honghao Su,Jing Huang,Jingyi Wu,Zhijie Yuan,Zhongyi Jiang
Molecular refining such as aromatics/alkanes separation has emerged as the dominant trend in the petrochemical industry, which can maximize the value of all feedstock molecules in naphtha. Covalent organic framework (COF) possesses exceptional structural design and functionalization flexibility, enabling facile incorporation of ordered structure and functional groups that can enhance the selective diffusion of aromatic components. Here, an imidazole-bearing COF (TpDAB) was designed and incorporated into Pebax matrix to prepare hybrid membranes for toluene/ n -heptane pervaporation separation. Imidazole groups selectively enhanced aromatics affinity by inducing p-orbital electron polarization in benzene rings. The imidazole-bearing COF can effectively maintain the pore size of the COF. The nanoscale pores of COF enabled rapid mass transfer. These features synergistically improved the flux and separation factor. Especially for the hybrid membrane with TpDAB content of 0.3 wt%, the highest performance was achieved with flux of 964 g m −2 h −1 and separation factor of 7.60 for 50 wt% toluene/ n -heptane mixture. Moreover, this study preliminarily explored the preparation of hollow fiber membrane (HFM), offering a potential pathway for the practical application of COF hybrid membrane.
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高影响因子
IONICS
·
2024
·Vol. 30
·期 3
·1403-1412
·
IF 2.4
Yu Chujie,Liu Baoyang,Li Mingzhu,Ding Xuli
Sodium-ion battery is evolving into a desirable alternative technology to lithium-ion batteries, thanks to its wide material distribution and low cost. Tin-antimony oxide is gaining research interest as a sodium-ion battery anode material owing to its ideal theoretical specific capacity, environment friendly, and low cost. However, because of the inner nature of poor electrical conductivity of oxides and slow ionic diffusion kinetic, the electrochemical performance of tin-antimony oxides (SSO) differs significantly from the theoretical value of merit. In this paper, we demonstrated N-doping porous carbon fibers encapsulated Sn/Sb@Sb 2 SnO 5 composite (Sn/Sb@Sb 2 SnO 5 @PCFs-N) material. Through the use of a simple electrostatic spinning technique, the Sn and Sb nanocrystalline were in situ generated around the SSOs in a specific way, and the N-doping in the fabricated porous carbon fibers can modulate the charge transport in the fabricated composite. The unique structure can successfully increase the electrical conductivity and the specific capacity of the fabricated composite. Using as anode for Na + ions storage, the fabricated composite delivers high specific capacity and good cycling stability and rate capability, showing a high capacity of 450 mAhg −1 at 50 mAg −1 current density even after 100 cycles. The better rate capability can be sustained even when the current raised up to 500 mA g −1 . This current work can offer a perspective on the effect of phases modified and doping on the functionality of materials for the next-generation high-specific energy sodium-ion battery.
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高影响因子
Scientific Reports
·
2014
·Vol. 4
·期 1
·1-11
·
IF 5.078
Qu Dan,Zheng Min,Zhang Ligong,Zhao Haifeng,Xie Zhigang,Jing Xiabin,Haddad Raid E.,Fan Hongyou,Sun Zaicheng
Photoluminescent graphene quantum dots (GQDs) have received enormous attention because of their unique chemical, electronic and optical properties. Here a series of GQDs were synthesized under hydrothermal processes in order to investigate the formation process and optical properties of N-doped GQDs. Citric acid (CA) was used as a carbon precursor and self-assembled into sheet structure in a basic condition and formed N-free GQD graphite framework through intermolecular dehydrolysis reaction. N-doped GQDs were prepared using a series of N-containing bases such as urea. Detailed structural and property studies demonstrated the formation mechanism of N-doped GQDs for tunable optical emissions. Hydrothermal conditions promote formation of amide between –NH 2 and –COOH with the presence of amine in the reaction. The intramoleculur dehydrolysis between neighbour amide and COOH groups led to formation of pyrrolic N in the graphene framework. Further, the pyrrolic N transformed to graphite N under hydrothermal conditions. N-doping results in a great improvement of PL quantum yield (QY) of GQDs. By optimized reaction conditions, the highest PL QY (94%) of N-doped GQDs was obtained using CA as a carbon source and ethylene diamine as a N source. The obtained N-doped GQDs exhibit an excitation-independent blue emission with single exponential lifetime decay.
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高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Liwei Su,Jing Zhan,Qihang Gu,Huan Chen,Lianbang Wang,Yuanhao Wang,Qing Hu,Manman Ren
Nickel foam (NF) is the most commonly-used current collector for supercapacitors due to open porous structures, good electrical conductivity, and excellent mechanical toughness. However, its insufficient specific surface area (SSA) and surface trace O affect the nucleation, nanostructures, and mass loadings of active materials, severely limiting the mass- and area-specific energy densities of electrodes. Therefore, it is of vital importance to achieving a higher SSA and preferred chemical composition. This work proposes a novel route to modify the surface with an N-doped carbon nanolayer (about 50 nm thick, ~1 wt% of the NF) and studies its influence on the morphology regulation and capacitive performance of NiCoMn-based carbonate hydroxide (as a case study). The preparation, chemical composition, and microstructure of the nanolayer are studied in depth. The morphology evolution of the carbonate hydroxide refers to shapes (from needles to flakes), flake thicknesses (5.2–18.4 nm), and mass loadings (0.8–6.0 mg cm −2 ). The optimized nanoflake delivers twice mass-specific capacitance and 4.5-folds area-specific capacitance of the nanoneedle at 1.0 A g −1 in aqueous electrolytes. The reversible capacitance is 1818F g −1 (909C g −1 ) at 10 A g −1 , with 95% retention after 10,000 cycles. The solid-state asymmetric capacitor offers a maximum energy density of 91.22 Wh kg −1 at a power density of 400 W kg −1 that is highly competitive related to reported works.
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高影响因子
FLUID PHASE EQUILIBRIA
·
2019
·
IF 2.514
Kai Kang,Shanshan Zhu,Xiaodong Liang,Georgios M. Kontogeorgis,Xiaopo Wang
In this work, the liquid densities of n -decane/ o -xylene mixtures were measured at four different component proportions, the mole fractions of n -decane are 0.2001, 0.4065, 0.5835, and 0.8041, respectively. The measurements were performed based on the high-pressure vibrating-tube densimeter , and the measured temperatures were from 283.15 K to 363.15 K and the pressures were from 0.1 MPa to 60 MPa. The Tammann-Tait equation was used to correlate the experimental densities, and the simplified Perturbed Associating Fluid Theory (sPC-SAFT) and Cubic Plus Associating (CPA) equation were used to predict the high-pressure densities of the mixtures with the binary interaction parameters. Derived properties, including isothermal compressibilities and isobaric thermal expansivities, were calculated from Tait equation, sPC-SAFT equation, and CPA equation, respectively. In addition, excess molar volumes of the considered mixtures were obtained and the effects of pressure and temperature on the excess molar volume were discussed.
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高影响因子
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
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2015
·
IF 2.729
Miaomiao Tian,Yongcun Zou,Shaoyan Zhou,Tianpeng Wang,Xueju Lv,Qiong Jia
Novel magnetic adsorbents based on Fe 3 O 4 /SiO 2 /poly(acrylamide- N , N' -methylene bisacrylamide) magnetic microspheres modified with non-ionic triblock copolymer surfactant were successfully prepared as a magnetic solid phase extraction adsorbent for the determination of trace natamycin in jam samples. The adsorbent was characterized by scanning electron microscopy, transmission electron microscopy, Fourier transformed infrared spectroscopy, vibrating sample magnetometer, and X-ray diffractometer analysis, confirming that Pluronic L64 was effectively functionalized on the magnetic materials. Various experimental parameters affecting the extraction capacity were investigated including adsorbent amount, extraction time, desorption time, sample pH, and ionic strength. For recovery evaluations, the jam samples were spiked at two concentration levels of 100 and 200 μg kg −1 of natamycin and the recovery values were in the range of 78.8–93.4%. The relative standard deviations (RSD) for the recoveries were less than 3.5%. The novel magnetic solid phase extraction method provided several advantages, such as simplicity, low environmental impact, convenient extraction procedure, and short analysis time when used for natamycin analysis.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiaolin Liu,Tian Tian,Aifeng Liu,Zengcai Guo,Jingbo Mu,Xiaoliang Zhang,Xuan Yue,Xiaoyan Liu,Fei Gao,Hongwei Che
Herein, nitrogen-doped carbon (NC) encapsulated CoP hollow spheres are designed and prepared through a sodium L-aspartate assisted carbonization-oxidation-phosphorization route. Experimental and theoretical analysis unveil that the encapsulating of NC results in improved electric conductivity and enhanced electrolyte wettability. Particularly, an interfacial charge redistribution induces the establishment of local electric field at the CoP/NC interface, which leads to a decrease in surface OH – adsorption energies, an enhancement in charge transfer efficiency between OH – and active materials, and a reduction in OH – diffusion energy barriers. Thus, the CoP@NC electrode materials demonstrate enhanced capacity values (998C g −1 at 2 A g −1 and 640C g −1 at 20 A g −1 ) and cyclic stability (a capacity retention of 92.7 % after 5000 cycles). Moreover, three-dimensional macroporous N-doped carbon foams (MNCFs) are prepared through a facile and eco-friendly strategy using sodium L-aspartate as N-containing carbon source. Such MNCFs possess large surface area, enhanced electrical conductivity, and high-efficiency mass and ion transport, thus achieving specific capacitances of up to 426F g −1 at 1 A g −1 and 325F g −1 at 10 A g −1 . Furthermore, the fabricated CoP@NC||MNCFs hybrid supercapacitor device delivers an energy density of up to 75.1 Wh kg −1 at 800 W kg −1 , and demonstrates a capacity retention of 93.8 % after 5000 cycles. Our work not only provides valuable insights but also opens new avenues for designing and constructing advanced electrode materials for high-efficiency energy storage applications.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jiaoe Dang,Sining Yun,Yongwei Zhang,Jingjing Yang,Zhuolei Liu,Changwei Dang,Yinhao Wang,Yingying Deng
With the increasing energy demands and impending climate change, significant concerns have been raised over the metal–organic frameworks (MOFs)-derived porous carbons and their utilization for hydrogen evolution reaction (HER) and triiodide reduction reaction (IRR). However, the provision of high intrinsic activity, active-site accessibility, and structural stability of MOF-derived Co-embedded N-doped carbon (Co/N-C) for HER and IRR is challenging. In this work, core-shell MOF-in-MOF precursors are designed to construct novel double-shell N-C-in-Co/N-C electrocatalysts with nanorod- and rhombic dodecahedron-shaped hollow morphologies (NR-H-C and RD-H-C). The double-shell structured NR-H-C and RD-H-C significantly enhance the HER and IRR activity of Co-MOF-derived Co/N-C. Specifically, NR-H-C achieves a high N-content (10.35 at.%), large specific surface area (590.87 m 2 g −1 ), and hierarchical porous configuration (micropores and mesopores). When NR-H-C is applied as the HER catalyst in alkaline electrolyte, it exhibits an admired overpotential of 123 mV at 10 mA cm −2 and a Tafel slope of 51 mV dec −1 . The solar cell adopting NR-H-C as counter electrode for IRR achieves a high short circuit current density of 16.77 mA cm −2 , an open-circuit voltage of 0.745 V, a fill factor of 0.682, and a power conversion efficiency of 8.51%, higher than that of Pt-based solar cell (16.26 mA cm −2 , 0.744 V, 0.602, and 7.28%). The elucidatory Volmer-Heyrovsky HER mechanism and reversed Volmer-Heyrovsky IRR mechanism give a better understanding of the enhanced dual-functional activity of NR-H-C. This work provides an essential information for the rational design of high-performance dual-functional HER and IRR catalysts and further open up a new avenue for the construction of multicomponent MOFs in the energy conversion field.
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高影响因子
EUROPEAN POLYMER JOURNAL
·
2015
·
IF 3.005
Hongwei Zhang,Qijian Niu,Ning Wang,Jun Nie,Guiping Ma
In this research a thermo-sensitive drug loaded core–shell fibers were prepared by UV photo-polymerization combined with electrospinning technology. The biodegradable polymer polylactic acid (PLA) was used as the core with electrospinning and the N-isopropylacrylamide (NIPAM) was selected to be shell of the fibers via UV photo-polymerization, respectively. Combretastatin A4 (CA4) was used as the model drug loaded in PLA (core structure) to test the thermo-sensitivity of the core–shell fibers. SEM was performed to observe the morphology of the fibers. TEM was carried out to confirm the core–shell structure of the fibers. Furthermore, XPS and FTIR results demonstrated that the core–shell structure had been fabricated as designed. Water contact angle (WCA) test indicated that the fibers show different wettability when the temperature was below or above the lower critical solution temperature (LCST). Moreover, in vitro drug release test was conducted to explore the difference of the drug release when the temperature was at 25 °C and 40 °C. The cell culture studies showed that the prepared core–shell structure nanofibers have a potential application in the biomedical fields as tissue engineering.
研究领域:
生物材料
·
药物递送
·
组织工程
·
高分子科学
·
纳米医学
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高影响因子
TETRAHEDRON
·
2018
·
IF 2.377
Qing-He Wang,Zhong-Xiang Zhu,Tiao Huang,Ming-Shu Wu
A new rearrangement of isatin-derived N,N′-cyclic azomethine imines to afford intermediate 3-hydroxy-1H-pyrazole -substituted oxindole was found, and then Michael addition of them to a vinyl bisphosphonate ester provided 3,3-disubstituted oxindole-fused pyrazolidone derivatives containing bisphosphonates in the presence of the readily available DMAP. This transformation is particularly attractive due to features such as unexpected rearrangement, mild conditions, atom economy, the ready availability of the starting materials.
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高影响因子
危险品化学品经营许可证（带存储）