MOLECULES
·
2024
·Vol. 29
·期 23
·5545
·
IF 4.2
Hui Liang,Ruijuan Li,Tongjin Liu,Rumei Li,Yuxiao Zhu,Feng Fang
Peroxymonosulfate (PMS)-based advanced oxidation processes have shown potential for the removal of organic contaminants; however, the preparation of catalysts with high degradation efficiencies and rapid reaction rates remains a challenge. In this study, we have successfully synthesized CoFe bimetallic modified corn cob-derived biochar (CoFe/BC) for the activation of PMS, achieving the rapid and efficient degradation of bisphenol F (BPF). The synthesized CoFe/BC catalyst demonstrated excellent catalytic performance, achieving over 99% removal within 3 min and exhibiting a removal rate of 90.0% after five cycles. This could be attributed to the cyclic transformation of Co and Fe, which sustained rapid PMS activation for BPF degradation, and Co0/Fe0played a significant role in the cyclic transformation. Furthermore, the electron paramagnetic resonance tests confirmed that •SO4−and •OH were the primary reactive oxygen species, while •O2−played a minor role in BPF degradation. This study highlights the high degradation efficiency, rapid reaction rate, excellent magnetic separation properties, and exceptional reusability of CoFe/BC catalysts for BPF removal, providing valuable insights for practical wastewater treatment.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Weijia Guo,Yutian Lu,Chongyang Zhang,Zhenxing Yue
Low-loss (high- Q × f , where Q = 1/tan δ ) dielectric ceramics can help achieve efficient microwave signal transmission and reduce heat generation. In the traditional Ca-Ln-Ti-O perovskite system (where Ln = rare earth) with the general formula of Ca 1– x Ln 2 x /3 TiO 3 (CST x ), the sharp decline in the Q × f value when x > 0.5 remains unexplained, posing a challenge for designing low-loss ceramics. In this study, CST x ceramics ( x ≤ 0.7) are synthesized via the solid-state reaction method, with a focus on their structure, defects, and broadband dielectric properties. A significant discrepancy between the Q × f values in the microwave and terahertz bands is found when x ≥ 0.6, suggesting the presence of additional loss mechanisms in the microwave band beyond ion displacement depolarization. Meanwhile, the low-frequency dielectric spectra show a weak dielectric relaxation in the low-temperature region, attributed to the partially ordered A -site vacancies. Therefore, this relaxation can act on the microwave frequency band at room temperature, resulting in a sharp decline in Q × f values. Such low-frequency and low-temperature dielectric relaxation should not be ignored in the research of microwave dielectric ceramics. These findings provide a crucial theoretical reference for developing low-loss microwave dielectric ceramics.
研究领域:
材料科学
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电子工程
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PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
·
2025
·
IF 4
Benshui Shu,Yuting Huang,Xinyi Xie,Cuiting Liu,Jintian Lin,Ying Xiao,Jingjing Zhang
Azadirachtin, a highly effective botanical pesticide, demonstrated notable biological activities against Spodoptera frugiperda , including mortality induction, growth and development inhibition, and antifeedant effects. Neuropeptide F (NPF) has been shown to play a role in various physiological processes in insects. Nonetheless, the functions of Sf- NPF1 in regulating food intake and antifeedant induction by azadirachtin in S. frugiperda larvae are yet to be elucidated. In this study, the antifeedant effects induced by 0.5 and 1.0 μg/g azadirachtin treatments in S. frugiperda larvae were evaluated. The sequence of Sf-NPF1 was identified with two transcript variants, and the proteins exhibit high identity with NPFs found in lepidopteran insects. Spatiotemporal expression analysis indicated that Sf-NPF1 exhibited high expression levels in first instar larvae and male adults, while the lowest expression was observed in non-feeding stages (egg and pupa stages). Besides, Sf-NPF1 also demonstrated notable expression in the midgut tissue of larvae. Azadirachtin treatments inhibited the expression of Sf-NPF1 in the larval midgut. The injection of the Sf- NPF1a mature peptide resulted in increased larval food intake and weight gain during a two-day treatment period. The antifeedant effect induced by 1.0 μg/g azadirachtin was also mitigated by the injection of Sf- NPF1a mature peptide. Our results indicated that Sf- NPF1 may serve as a positive regulator of food intake in S. frugiperda larvae, while azadirachtin could exert an antifeedant effect in larvae via inhibiting the expression of Sf-NPF1 . These findings establish a foundation for comprehending the mechanism behind the antifeedant effect induced by azadirachtin in insect larvae and provide a potential target for developing novel insecticides.
研究领域:
昆虫学
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分子生物学
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农药科学
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生理学
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生物化学
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CHEMISTRY & BIODIVERSITY
·
2025
·
IF 2.5
Zhi-Wen Wan,Rui Meng,Hua-Yuan Yang,Xing Yang,Qin Zhou,Min Wu,Bin Li,Xia Zhang
Rosa roxburghii f. eseiosa Ku, a thornless variety of Rosa roxburghii Tratt, remains underexplored regarding the tissue-specific functionality and structure-activity relationships of its polysaccharides. This study systematically investigated the composition and bioactivities of polysaccharides extracted from the fruit, root, stem, and thick stem of this variant. Using gradient ethanol precipitation (40%, 60%, and 80%), polysaccharides with distinct molecular weight (M w ) profiles were obtained. All isolates were identified as acidic heteropolysaccharides with complex and tissue-dependent monosaccharide compositions. Fractions precipitated with 60% and 80% ethanol exhibited lower M w s and significantly enhanced bioactivities, including potent radical scavenging capacity and α -glucosidase inhibition. Notably, RREK-R60, the crude polysaccharide obtained from the roots of Rosa roxburghii f. eseiosa Ku via 60% ethanol precipitation, exhibited a notable α -glucosidase inhibition rate of 92.91%. Structural analysis revealed tissue-specific traits, such as the unique presence of N-acetylglucosamine in fruit and root samples, along with elevated uronic acid, galactose, and arabinose content, which correlated strongly with bioactivity. These findings underscore the potential of Rosa roxburghii f. eseiosa Ku polysaccharides as functional food ingredients or anti-diabetic agents. Further in vivo studies and detailed structural elucidation are warranted to fully establish their structure-activity relationships. Graphical The graphical abstract comprises three sections. The left panel shows the distribution of different tissues of Rosa roxburghii f. eseiosa Ku. The middle illustrates the flowchart for the extraction and purification of crude polysaccharides. The right section presents Key Findings on Bioactive Polysaccharides from Rosa roxburghii f. eseiosa Ku. This figure summarizes the structure-activity relationships of polysaccharides from various tissues of the plant. Major findings include: 1) N-Acetylglucosamine content positively correlates with 2,2-diphenylpicrylhydrazyl radical scavenging activity; 2) Polysaccharides obtained with 60–80% ethanol exhibit superior antioxidant capacity, attributed to lower molecular weight and higher polyphenol content; 3) Higher galactose content in RREK-F60 and RREK-R60 enhances 2,2′-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) radical scavenging; 4) RREK-R60 shows remarkable α-glucosidase inhibition (92.91%), likely due to its high arabinose, glucose, and xylose composition.
研究领域:
植物生物化学
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功能食品
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天然产物化学
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植物化学
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糖尿病研究
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高影响因子
MOLECULES
·
2023
·Vol. 28
·期 23
·7894
·
IF 4.6
Jia-Bin Xiong,Yong-Juan Zhou,Shi-Hui Wang,Zhang-Qi Xiong,Zi-Kun Zhang,Shan-Shan Zhang,Chen-Kunlun Zhang,Chao-Fan Xu,Guo-Qun Liu
MOF (metal organic framework) materials have been used as functional materials in a number of fields due to their diverse spatial tunability, which produces rich porous structures with stable and continuous pores and a high specific surface area. A triboelectric nanogenerator can convert trace mechanical energy into electrical energy, and the application of MOF materials to triboelectric nanogenerators has been intensively studied. In this work, we report on two MOFs with similar spatial structures, and the modulation of the end microstructures was achieved using the difference in F content. The output performance of friction power generation increases with the increase in F content, and the obtained polyacidic ligand materials can be used to construct self-powered corrosion protection systems, which can effectively protect metallic materials from corrosion.Keywords:TENG;MOF;corrosion protection;cathodic protection
研究领域:
材料科学
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能量转换
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腐蚀工程
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SURFACE & COATINGS TECHNOLOGY
·
2025
·
IF 6.1
Huaiyin Chen,Mingzu Xu,Jinbo Wang,Congxiang Li,Xiaolin Liu,Meihua Wu,Wei Wang,Longmin Liu,Yongzhao Li,Weihe Yu,Yuekun Lai,Weilong Cai
In this work, amphiphilic Janus F-SiO 2 -NH 2 particles were prepared through step-by-step modification of SiO 2 particles inlaid in and released from paraffin microspheres by fluorosilane and aminosilane respectively, and further modified waterborne epoxy (WEP) coating. The morphology, structure, composition, and surface wettability of the prepared particles as well as the mechanical properties and corrosion resistance were investigated. The results indicate that the modified coating gained the improved mechanical properties and anti-corrosion performance. Electrochemical impedance spectroscopy tests show that after immersion in 3.5 wt% NaCl solution for 15 days, the impedance modulus at low frequency of F-SiO 2 -NH 2 modified WEP coating was above 10 6 Ω∙cm 2 , two orders of magnitude higher than that of WEP coating. The amphiphilic Janus F-SiO 2 -NH 2 particles not only improved the interfacial compatibility and penetration resistance through the good dispersibility, hydrophobic groups and cross-linking with epoxy resin matrix, but also oriented adsorbed on steel surface to form protective hydrophobic layers. This work provides a simple design approach for constructing highly corrosion-resistant waterborne coatings, which has a certain promoting effect on the development of environmentally friendly high-performance anti-corrosion coatings.
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RSC Advances
·
2017
·Vol. 7
·期 7
·3949-3957
·
IF 3.108
Enjie Yu,Qilong Zhang,Nuoxin Xu,Hui Yang
In this study, self-assembly flower-like TiO2 (F-TiO2) particles with an average diameter of 400 nm are synthesized via a facile one-pot solvothermal method. P(VDF-HFP)-based composites with F-TiO2 particles of different volume ratio as fillers are prepared. Microstructure and thermal analyses confirm that F-TiO2 does not change the crystallization process of the polymer matrix, but disrupts the crystallization degree of P(VDF-HFP). Dielectric properties measured at various frequencies and temperatures indicate that the addition of the F-TiO2 fillers enhances the dielectric constant of the composites, while the dielectric loss and electric conductivity do not significantly increase. The dielectric permittivity of the polymer nanocomposites is enhanced by 200% over that of the P(VDF-HFP) matrix at a filler content of 20 vol% while maintaining a rather low dielectric loss (0.043 at 1 kHz). Especially, the F-TiO2/P(VDF-HFP) composites exhibit low electric conductivity (≤10−11 S cm−1) at low frequencies. All the improved performances suggest an easy method to fabricate nanocomposites having potential electrical applications.
研究领域:
材料科学
·
电气工程
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Lin An,Xin Han,Yaogang Li,Hongzhi Wang,Chengyi Hou,Qinghong Zhang
Tantalic oxide (Ta 2 O 5 ), as an excellent transition metal oxide photocatalyst , has been extensively studied on fluorination or self-doped for hydrogen production , while there is little research to combine the two modifications. In this work, surface fluorination self-doped Ta 2 O 5 nanoshuttles (FTNSs) photocatalyst is synthesized successfully by a modified one-step hydrothermal method . The test results show the presence of surface fluorine ions , Ta 4+ and oxygen vacancies in the sample. The FTNSs prepared by hydrothermal method under 180 °C for 24 h exhibits the highest hydrogen evolution rate (HER). The HER is 179.2 and 19.78 μmol h −1 g −1 in the absence of any co-catalyst under full-spectrum and simulated solar light, respectively, which is higher than that of the Ta 2 O 5 nanoshuttles without fluoride and the commercial Ta 2 O 5 . The higher HER can attribute to the existence of F, Ta 4+ and oxygen vacancies, which enhance the photogenerated carrier mobility and reduce the recombination.
研究领域:
材料科学
·
能源化学
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Rongjing Jia,Shuling Chang,Ruirui Wang,Yanhong Xu,Rijie Wang,Lihong Zhang
The electrocatalytic CO 2 reduction reaction to CO (ECO 2 RR) is an effective way to achieve carbon resource utilization. It requires catalysts that can synergistically couple CO 2 activation with efficient CO desorption. This work engineers this synergy by constructing an interfacial Ag δ+ -O-Zn configuration on Zn(OH)F-derived supports via controlled Ag loading (0–5 wt%). The optimal catalyst (3A/Z, 3 wt% Ag) balances the formation of interfacial, oxidized Ag species (Ag δ+ ) with well-dispersed metallic Ag 0 nanoparticles. It achieves a CO Faradaic efficiency of 95.4% at −1.15 V vs. RHE and maintains 86% efficiency over 5 h at 6.38 mA cm −2 . In-situ ATR-SEIRAS spectra and kinetics reveal that Ag δ+ -related sites lower the barrier for *COOH formation, while adjacent Ag 0 domains facilitate *CO desorption. Excessive loading (5A/Z) promotes Ag aggregation and support decomposition, diminishing the critical Ag δ+ -O-Zn interface and performance. This study highlights interface coordination engineering as a key strategy for designing bifunctional ECO 2 RR catalysts.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Qiyuexin Wang,Hanyu Li,Huan Li,Xueying Yang,Fangcheng Qiu,Dacheng Zhou,Zhengwen Yang,Xin Zhen,Jianbei Qiu
The implementation of liquid organic hydrogen carriers (LOHCs) is constrained by the high energy consumption and strong dependence on precious‑metal catalysts in conventional thermal processes. This work develops a fluorine-doped Mo-Ni-F/NF bifunctional electrode through a simple electrochemical deposition-sintering method for efficient electrochemical hydrogen storage using quinoxaline under ambient conditions. XRD and TEM characterization revealed a unique structure comprising a MoNi₄ shell with embedded Ni nanoparticles, while SEM and EDS mapping confirmed uniform fluoride distribution and enhanced surface morphology. XPS analysis indicated that fluoride modification improved surface characteristics without altering chemical states. The catalyst demonstrates exceptional performance in reversible quinoxaline hydrogenation (92.1 % conversion after 5 h, 95.6 % FE) and dehydrogenation (100 % conversion after 4 h, 97.2 % FE). DFT calculations showed that electron transfer between MoNi₄ and nickel nanoparticles enhanced catalytic activity, while fluorine modulation reduced the adsorption energy of quinoxaline on nickel (111) from −2.84 eV to −0.55 eV, and tetrahydroquinoxaline from −2.08 eV to −0.84 eV, mitigating catalyst poisoning. In situ Raman spectroscopy identified dynamically formed NiOOH as the active phase, which facilitates proton-coupled dehydrogenation via -OH/μ-O-Ni intermediates. This work provides novel catalytic materials and mechanistic insights for the development of low-cost, room-temperature, and highly effective electrochemical LOHC systems.
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BIOSENSORS & BIOELECTRONICS
·
2026
·
IF 11.8
Li Jinsong,Shi Xiaoxia,Yang Huihuang,Cai Li,Li Zhongbo,Zhang Lijun
Urea is a key biomarker for diagnosing various kidney and liver disorders, which can be assessed through sensing platforms. However, existing urea sensors have performance issues in real samples. Herein, a novel fiber-organic electrochemical transistor (F-OECT) sensing platform was constructed by sequentially depositing cobalt-based metal-organic framework material (ZIF-67), carboxylated multi-walled carbon nanotubes, poly (3,4-ethylenedioxythiophene), and urease on cotton fibers for urea determination. The resulting F-OECT sensor exhibited excellent performance toward urea detection with a high sensitivity (82.91 μA/decade). This performance is attributed to the synergistic effect of the hierarchical composite: the significantly enlarged electrochemically active surface area of PEDOT/f-MWCNT/ZIF-67 facilitates high-density urease immobilization, while the conductive network ensures efficient signal transduction, coupled with the intrinsic signal amplification of the OECT architecture. Under optimized conditions, the F-OECT sensor illustrated a wide linear response range (1 pM-10 mM) and a low detection limit of 1 pM toward the detection of urea, coupled with an excellent selectivity, reproducibility, and stability. More importantly, the F-OECT sensor was able to detect urea in real sweat and urine samples. Based on these encouraging data, the F-OECT sensor was connected to a printed circuit board to transmit signals via Bluetooth, and the results showed a sensor capable of visually quantifying urea. Overall, the proposed F-OECT sensor looks promising for future non-invasive and sensitive liquid detection of urea, thereby deserving further research and development.
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SOLID STATE IONICS
·
2018
·
IF 2.751
Xue Bai,Wen Li,Aijia Wei,Qian Chang,Lihui Zhang,Zhenfa Liu
Spinel Li 4 Ti 5 O 12 doped with F was synthesized via the solid-state reaction of anatase TiO 2 , Li 2 CO 3 , and NH 4 F. The structural characterization and electrochemical performance evaluation of the prepared materials were carried out utilizing X-ray diffraction, scanning electron microscopy, galvanostatic charge-discharge, electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV) tests. The lattice parameters of all samples were calculated using an internal standard and Rietveld refinement method. The results indicate that the F was successfully doped into the lattice structure of Li 4 Ti 5 O 12 , and this process did not influence the crystal structure and superficial morphology. Moreover, the best-performing material, Li 4 Ti 5 O 11.9 F 0.1 delivers superior rate capacities of 165, 162.1, 160.0, 142.3, 125.1, and 99.2 mAh g −1 , at 0.2 C, 0.5 C, 1 C, 3 C, 5 C, and 10 C, respectively, which is higher than those of Li 4 Ti 5 O 12 (150.0, 135.0, 123.5, 93.7, 76.4, and 56.8 mAh g −1 at the same C-rates), and the cycling retention is 82.7% after 150 cycles at 5 C. Meanwhile, the charge-transfer resistance (R ct ) of Li 4 Ti 5 O 11.9 F 0.1 (56.4 Ω) is lower than that of pure Li 4 Ti 5 O 12 (80.6 Ω), and the lithium-ion diffusion coefficients (D Li + ) of Li 4 Ti 5 O 11.9 F 0.1 (2.505 × 10 −10 cm 2 s −1 ) is higher than that of pure Li 4 Ti 5 O 12 (1.694 × 10 −10 cm 2 s −1 ).
研究领域:
材料科学
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电化学
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能源存储
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无机化学
·
固体化学
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高影响因子
危险品化学品经营许可证（带存储）