Science Advances
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2025
·Vol. 11
·期 9
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IF 12.5
Jingyi Wang,Haotian Gao,Kunpeng Zhao,Hexige Wuliji,Binru Zhao,Jie Ma,Xingyu Chen,Jiawei Zhang,Yanping Sui,Tian-Ran Wei,Min Zhu,Xun Shi
High-entropy materials have expanded the frontier for discovering uncharted physicochemical properties. The phenomenon of chemical fluctuation is ubiquitous in high-entropy materials, yet its role in the thermoelectric field is often overlooked. Herein, we designed and synthesized a series of (Mg0.94−nYb0.26Sr0.26Znm)(MgnCd0.69Zn0.69−mNax)(Sb1.74Ca0.26) samples characterized by ultrahigh configurational entropy. These samples exhibit a homogeneous single-phase structure at macroscopic and microscopic scales, yet display notable chemical fluctuations at the atomic to nanoscale. These fluctuations, along with the unusual atomic occupations, lead to an exceptionally low lattice thermal conductivity akin to that of amorphous materials. Combining the optimized carrier concentration and well-maintained carrier mobility, we ultimately achieved a high zT value of 1.2 at 750 kelvin, outperforming most previously reported AB2Sb2-type Zintls. This study underscores that the atomic to nanoscale chemical fluctuations are the crucial catalyst for the enhanced thermoelectric performance in high-entropy materials.
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高影响因子
REACTIVE & FUNCTIONAL POLYMERS
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2025
·
IF 5.1
Fan Lu,Hongbo Mo,Yu Wan,Biying Tian,Chuan Wang,Ting Qiao,Weigang Fan,Yuepeng Fan,Li Ran,Yuhu Zhang
In order to improve the toxicity of traditional molecularly imprinted polymers and their limited application in water environment, chitosan was introduced as a green functional monomer into molecular imprinting technology. Chitosan-based hydrophilic magnetic molecularly imprinted polymers (CS-MMIPs) were prepared on the surface of Fe 3 O 4 -COOH for selective removal of IBP in water environment. The adsorption of IBP by CS-MMIPs followed the quasi-second-order kinetic model and the Freundlich isotherm model, with the maximum adsorption capacity of 123.17 mg·g −1 for IBP and an imprinting factor of 2.17. Characterization, data fitting, and parametric analysis revealed that hydrogen bonding, lewis acid-base interactions and electrostatic interactions were the primary forces between CS-MMIPs and IBP. Furthermore, CS-MMIPs were successfully used as magnetic solid-phase extraction (MSPE) sorbents in combination with high-performance liquid chromatography (HPLC) for the detection of IBP. Under optimized MSPE conditions, a rapid and economical method for detecting IBP in aqueous environments was established, with the extraction process required only 3.5 min and recovery rates ranging from 89.46 to 106.12 %, relative standard deviations (RSD) of 1.2 % to 4.2 %, and limit of detection (LOD) of 0.08 μg·mL −1 . Therefore, CS-MMIPs demonstrate considerable potential and utility for the removal and detection of IBP.
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TALANTA
·
2017
·
IF 4.162
Wen-kui Li,Juan Chen,Hai-xia Zhang,Yan-ping Shi
A novel, efficient, and high-selectivity magnetic solid-phase extraction (MSPE) adsorbent based on Fe 3 O 4 nanoparticles , hydroxylated multi-walled carbon nanotubes (MWCNTs-OH) and metal-organic frameworks (MOFs) was prepared and applied for trace aromatic acids determination in solid samples by applying a template-free in situ strategy. The morphology, configuration and magnetic behavior of the adsorbent were characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectra, and vibrating sample magnetometer (VSM). The adsorbent can achieve the selective extraction of aromatic acids from the aromatic mixture in apple samples, which was mainly promoted by intermolecular hydrogen bonding and π-π electron-donor-acceptor (EDA) interaction. The potential application of the adsorbent was evaluated by MSPE of trace 1-naphthylacetic acid (NAA), cinnamic acid (CA) and terephthalic acid (TPA) from apple samples under the optimal conditions which were investigated. Satisfactory linearities were obtained in a range of 5–500 ng/g and the recoveries of three aromatic acids at three spiked levels ranged from 91.2% to 98.0% with the relative standard deviations (RSD) of less than 5.5%. The limits of detection (LODs) for CA, TPA and NAA were 0.17, 0.61, and 0.86 ng/g. The satisfactory results confirmed the great potential of the novel adsorbent for the selective extraction of aromatic acids from complex sample matrices.
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MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Yan Zhou,Jinlong Wang,Wangni Meng,Lian Xia,Yue Tang,Jianli Zhou,Yuangen Wu,Pengcheng Yan
Acetamiprid (ACE), a neonicotinoid pesticide broadly used in agricultural production, can accumulate in the food chain due to excessive or incorrect use, thereby posing a threat to human health. In this manuscript , a colorimetric aptasensor assisted by a smartphone was established, relying on the S-18 aptamer-mediated amplification of the laccase-mimic activity of spherical Ag 2 O nanoparticles (NPs). The S-18 aptamer strengthens the interaction and facilitates electron transfer between the Ag 2 O NPs and oxidative substrates, which significantly improves the laccase-mimic activity of the Ag 2 O NPs. When acetamiprid is present, the S-18 aptamer preferentially binds to the target molecule, forming a steady aptamer-acetamiprid complex. This binding interaction prevents the aptamer from promoting the catalytic behavior of the Ag 2 O NPs, producing a distinct and quantifiable color variation in the reaction system. Monitoring the concentration-dependent colorimetric response enables the quick and accurate identification of acetamiprid. The colorimetric aptasensor achieved a limit of detection (LOD) of 8.69 μg∙L −1 markedly lower than the maximum residue limits defined by the national standard (GB 2763–2019) for acetamiprid in fruits and vegetables. Furthermore, the aptasensor demonstrates satisfactory recovery rates in actual samples analyses of cabbage, apple, and tomato, confirming its practical potential for on-site food safety oversight.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Shoja Mirzaei,Fatemeh Ghamari,Jalal Arjomandi,Rahim Mohammad Rezaei
Twelve lead-based alloys (labels A 1 -A 12 ) were systematically fabricated by introduction of different elements including Sb, Sn, Al, Ca, Na and Ba metals (W%). Their corrosion behavior was studied using weight-loss measurements, OCP, potentiodynamic polarization, and EIS at various temperatures between 20 and 70°C. Microstructural and compositional analyses of lead alloys were performed by FE-SEM, mapping, and EDX. To investigate the effect of the surface morphological features on corrosion resistance of alloy electrodes, the surface morphological and statistical, watershed algorithm, and fractal studies were performed using FE-SEM analysis. The result show that, the distinct morphology of the label A 5 (Pb 97.25 , Al 0.11 , Ca 0.17 , Sn 2.47 ) alloy electrode provides a lower contact area at interface of electrode/electrolyte, originating from smooth surface with minimum roughness and porosity, with more well-developed and noncomplicated topography. Accordingly, among the manufactured lead alloys and in 70°C, A 5 exhibited the lowest corrosion current density (<0.02 mA cm⁻²), highest polarization resistance (>590 Ω cm²), and most coherent SnO 2 -rich passive layer, resulting in a minimal weight-loss rate. By adding the Sn element into the lead alloy, the reduction of alloy corrosion occurs by the formation of SnO 2 in A 5 alloy. Sn element in A 5 reduces slope of cathodic and anodic lines and shifts corrosion potential towards positive values resulting better corrosion resistance. Sn presence in A 5 alloy, compared to other alloys, has increased surface chemical stability, improved oxidation resistance, and reduced rate of redox reactions in 70°C. These findings demonstrate the critical synergy of Sn with minor alloying elements in enhancing high-temperature corrosion resistance in lead-acid battery applications.
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JOURNAL OF ELECTRONIC MATERIALS
·
2025
·Vol. 54
·期 10
·8561-8569
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IF 2.5
Dong Tianhao,Cui Yongpeng,Wei Lianghuan,Zhu Shengjie,Si Jianxiao
CaM(M = Cu, Ag)Sb Zintl-phase compounds have ignited tremendous research activities due to their promising thermoelectric properties. In this work, a series of CaCu 1− x Ag x Sb (x = 0, 0.2, 0.4, 0.6, 0.7, 0.8, 0.9, 1) samples have been synthesized and investigated. The continuous structure transition from the hexagonal CaCuSb to the orthorhombic CaAgSb is characterized as the composition regulation on Cu/Ag ratios. Lattice bonding hardens and the electrical band structure changes as a result of this transition. The lattice thermal conductivity of CaCu 0.2 Ag 0.8 Sb, which benefitted from the structure transition, showed a minimum value of 1.05 W m −1 K −1 at 323 K. At the same time, the Seebeck coefficient was improved as a result of the rise in effective mass. The findings show that the CaMSb compounds have flexible structural tunability for thermoelectric applications if the hole concentration can be further optimized. Graphical
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INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION
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2025
·
IF 1.6
Junxia Chai,Hongbo Mo,Chuan Wang,Fengjie He,Jufen Huang,Li Ran,Weigang Fan,Yuepeng Fan,Fan Lu
This study developed Fe3O4@SiO2–C = C-based magnetic molecularly imprinted polymers for selective ibuprofen removal and detection. The optimized synthesis using an ibuprofen (IBP)/(3-aminopropyl)triethoxysilane (APTES)/tetraethyl orthosilicate (TEOS) molar ratio of 1:6:18 achieved a high adsorption capacity of 68.18 mg·g−1 and an imprinting factor of 2.17. The adsorption process followed pseudo-second-order kinetics and the Freundlich isotherm model, indicating multilayer binding behavior. The material demonstrated excellent reusability with only 2.8% capacity loss after five cycles and good reproducibility with a relative standard deviation of 4.48%. In magnetic solid-phase extraction applications, the recovery rate reached 81.61% to 96.40% for real water samples with a detection limit of 0.09 μg·mL−1. The polymers showed selective recognition of ibuprofen over structural analogs due to synergistic π-π interactions and hydrogen bonding, thus offering an efficient strategy for remediating pharmaceutical pollutants in water.
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