MOLECULES
·
2025
·Vol. 30
·期 3
·729
·
IF 4.6
Heying Chu,Yong Li,Yuanjie Liu,Xueping Chai,Hongzhou Zhang,Jingchuan Zhang
Bismuth-based materials that adhere to the alloy/dealloy reaction mechanism are regarded as highly promising anode materials for potassium-ion batteries due to their high volume-specific capacity and moderate reaction potentials. However, their commercial viability has been limited by the effects of structural collapse due to volume distortion and impeded electron conduction, resulting in rapid capacity decline. In this work, a carbon-coated nanosized BiPO4rod (BiPO4@C) was designed and fabricated to overcome the aforementioned challenges through the architecture engineering and anionic-tuning strategy. In particular, the nanosized nanorods significantly reduce the volume expansion; the incorporation of the bulk and open-skeleton anion PO43−serves to mitigate the considerable volume distortion and generates the high ionic conductivity product (K3PO4) to ameliorate the poor ionic transport due to the structural deformation. The elaborated BiPO4rods exhibit high specific capacity (310.3 mAh g−1, at 500 mA g−1), excellent cycling stability (over 700 cycles at 500 mA g−1) and superior rate performance (137.8 mAh g−1, at 1000 mA g−1). Systematic ex-situ XRD and TEM, as well as kinetic tests, have revealed the “conversion-multistep alloying” reaction process and the “battery-capacitance dual-mode” potassium storage mechanism. Moreover, the thick electrodes showed excellent specific capacity and rate performance, demonstrating their significant application potential in the next generation of SIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CATALYSIS
·
2025
·
IF 6.5
Huacheng Ying,Zeyu Wen,Jia Yao,Mowei Zhou,Yongtao Wang,Haoran Li
Constructing N−O bond in amines via aerobic oxidation is of high interest for producing cyclohexanone oxime; however, the mechanism remains disputed. Concerning TiO 2 /NHPI co-catalyzed aerobic oxidation of cyclohexylamine, here a convincing mechanism involving α-C radical and oxaziridine as key intermediates is demonstrated. All the evidences from electron paramagnetic resonance, mass spectrometry, and product analysis with methylated substrates lead to the same story about the mechanism, where both radical translocation of cyclohexylamino radical and epoxidation of 1-hydroperoxycyclohexylamine are mediated by double proton transfer and are the key to convert amine into oxime. Near IR analysis indicate that surface hydroxyl groups on TiO 2 facilitate the double proton transfer process. Here the unveiled role of surface hydroxyl on TiO 2 highlights its potential for broader applications in amine activation. Additionally, the well-established radical mechanism provides valuable insight into the construction of N−O bonds in amines.
研究领域:
化学
·
催化反应
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yun Liu,Guijiang Liu,Yanyan Yu,Yunying Wang
The burgeoning interest in single atom catalysts (SACs) stems from their exceptional oxidase-mimicking capabilities, driving substantial advancements in this field. Nevertheless, a critical knowledge gap remains regarding the influence of Zn incorporation on the oxidase-like activity of atomically dispersed Fe-N-C catalysts. This study successfully synthesized and comprehensively characterized three distinct SACs (FeZn SAC-N@C, Fe SAC-N@C, and Zn SAC-N@C) using TEM, HAADF-STEM, XRD, XPS, BET, ICP-MS, and XAFS techniques. Activity assays revealed that FeZn SAC-N@C exhibited the highest oxidase-mimicking activity, with Fe SAC-N@C displaying moderate activity, whereas Zn SAC-N@C did not exhibit oxidase-like behavior. The superior oxidase-like activity of FeZn SAC-N@C is attributed to its enhanced O 2 activation capacity, characterized by a high free energy of 0.90 eV in the rate-determining reaction step, surpassing those of Fe SAC-N@C (0.85 eV) and Zn SAC-N@C (0.71 eV). EPR and DFT calculations elucidated the catalytic mechanism of FeZn SAC-N@C, involving the generation of O 2 − radicals. As a proof-of-concept, FeZn SAC-N@C demonstrates potential as a colorimetric sensor for detecting ascorbic acid and nitrite, achieving a limit of detection of 0.77 μM for ascorbic acid and 0.16 μM for nitrite. These findings open a new avenue for configuring bimetallic atomically dispersed catalysts with oxidase-like activity in future research.
研究领域:
生物化学
·
材料科学
·
催化反应
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Ziyi Zhu,Ying Wu,Yejun Zhong,Hui Zhang,Junzhen Zhong
In this study, it was found that the enhancement in the viability of Lactobacillus plantarum under gastrointestinal conditions by encapsulating them within novel C-Phycocyanin-pectin based hydrogels (from 5.7 to 7.1 log/CFU). The hardness, the strength and the stability of the hydrogels increased when the protein concentration was increased. In addition, the addition of resveratrol (RES), and tannic acid (TA) could improve the hardness (from 595.4 to 608.3 and 637.0 g) and WHC (from 93.9 to 94.2 and 94.8 %) of the hydrogels. The addition of gallic acid (GA) enhanced the hardness (675.0 g) of the hydrogels, but the WHC (86.2 %) was decreased. During simulated gastrointestinal conditions and refrigerated storage, the addition of TA enhanced the viable bacteria counts (from 6.8 and 8.0 to 7.5 and 8.5 log/CFU) of Lactobacillus plantarum . Furthermore, TA and GA are completely encased by the protein-pectin gel as an amorphous state, while RA is only partially encased.
研究领域:
食品科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2025
·
IF 12.1
Hui Luo,Lingxin Kong,Sihai Lv,Qifan Li,Mi Tang,Xujin Ge,Fu Chen,Yongzhi Cheng,Xiangcheng Li
The rational manipulation of interfacial properties, composition, and morphology of materials has emerged as an effective strategy for enhancing their microwave absorption performance. The crystal phase composition, microstructure, and electromagnetic properties can be regulated by varying the thermal treatment temperature. The synergistic integration of heterogeneous interfaces, magnetic materials, microstructures, and defect engineering helps optimize impedance matching and enhance polarization and magnetic losses. Herein, multi-interface core–shell FeSiAl@MnO x @C composites with various morphologies demonstrated superior microwave absorption performance. A minimum reflection loss of −56.3 dB is achieved at an absorber thickness of 1.41 mm, and effective absorption bandwidth of 5.0 GHz is obtained at a thickness of 1.59 mm. The radar cross-section reduction value reached 19.448 at an incidence angle of 0°. The excellent microwave absorption performance is due to the synergistic effect of the significant magnetic and dielectric losses and improved impedance matching. This study establishes a foundation for designing next-generation high-performance microwave-absorbing materials with high magnetic losses.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yuwei Wang,Xiaoyan Yuan,Zhuoying Ping,Dan Wei
One-dimensional materials are broadly applied in electromagnetic wave (EMW) absorption due to their fast electron transport paths. Herein, SiC/C nanofibers (SiC/C NFs) with rough surface and fluffy structure were prepared by electrospinning, using zinc acetylacetone as a structural modifier. The morphology and microstructure of the as-prepared fibers were changed by Zn sublimation during heat treatment process, leading to significantly improve their dielectric parameters and EMW absorption performance. The minimum reflection loss (RL, dB) of the SiC/C NFs/paraffin with a filling ratio of 15 wt% was −46.77 dB, and effective absorption bandwidth (EAB, RL < −10 dB) reached 5.84 GHz at 1.96 mm. The delightful performance was mainly attributed to the fluffy microstructure caused by the Zn sublimation, the fast electron transport paths established by the fibers, and the enhanced polarization loss brought by effective heterogeneous interfaces. Therefore, a referable strategy was put forward structural engineering for the absorber of SiC/C NFs.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Turkish Journal of Gastroenterology
·
2025
·Vol. 36
·期 9
·573
·
IF 1.6
Hailiang Liu,Xile Wei,Ye Nie,Jianshan Liu,Ming Fan
Background/Aims: The function and mechanism of ubiquitin-specific protease 34 (USP34) in hepatocellular carcinoma (HCC) were explored to provide new molecular targets for treating HCC. Materials and Methods: In the present study, bioinformatics techniques, quantitative real-time polymerase chain reaction, and western blot were used to detect the level of USP34 in HCC tissues and cell lines. Small interfering RNA of USP34 was transfected into HCC cells, and then Cell Counting Kit-8 (CCK-8) assay, wound healing assay, and transwell assay were performed to verify the proliferation, migration and invasion of HCC cells. Enzyme-linked immunosorbent assay was utilized to assess the glycolysis level in HCC cells. Co-immunoprecipitation was used to evaluate the ubiquitination level of cellular Myc (c-Myc). Results: The expression of USP34 was upregulated in HCC patients and strongly associated with worse outcomes. Meanwhile, interference with USP34 suppressed the proliferation, migration, and invasion of HCC cells. In addition, silencing of USP34 reduced the glucose uptake, lactate production and ATP content in HCC cells, as well as downregulated the expression levels of glycolysis-related proteins (hexokinase 2, glucose transporter 1, pyruvate kinase M2, and lactate dehydrogenase A). Furthermore, the knockdown of USP34 enhanced the ubiquitination level of c-Myc and increased the degradation of c-Myc. Overexpression of c-Myc reverted the inhibitory effects of si-USP34 on the malignant biological behavior in HCC cells. Conclusion: TheUSP34 regulates aerobic glycolysis and inhibits the progression of HCC by accelerating c-Myc ubiquitinated degradation.
研究领域:
肿瘤学
·
分子生物学
·
肝胆疾病
·
信号转导
·
癌症代谢
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
·
2012
·Vol. 26
·期 7
·719-727
·
IF 2.79
Yingzhi Liu,Bo Su,Xian Wang
RATIONALE The study of interactions between protein and pharmaceutical molecules including natural extracts has become of increasing interest in biological and biomedical research. An investigation of the interaction between saikosaponins and cytochrome c (Cyt c) by electrospray ionization mass spectrometry (ESI-MS) is described in this study. Saikosaponins are found in Bupleurum falcatum (a flowering plant), and they are glycosides that consist of saccharides and the sapogenins of triterpenoids. METHODS Seven model molecules of saccharides and triterpenes, namely maltose (Mal II), maltotriose (Mal III), raffinose (Raf), and stachyose (Sta), glycyrrhetinic acid (Gly), ursolic acid (Urs) and oleanic acid (Ole), were chosen to perform a series of ESI-MS control experiments for the exploration of the interaction groups in saikosaponins with Cyt c. The dissociation constants of detected noncovalent complexes were determined by using a direct ESI-MS assay. RESULTS We have observed in the ESI mass spectra the formation of Cyt c complexes with saikosaponins a and c, and these saccharides, with 1:1 and 1:2 stoichiometry. Our results showed that no complex ions of triterpenes and Cyt c were detected in the ESI-MS and similar Kd values were obtained for the Cyt c complexes of saikosaponins and saccharides. This demonstrates that the glycosyl moiety in the saikosaponins is the effective interaction group with Cyt c. We propose that saikosaponins and saccharides interact with Cyt c by hydrogen bonds. The binding affinity of these six ligands with Cyt c is shown to be in the order Ssa > Ssc > Raf, Mal III > Sta ≥ Mal II. CONCLUSIONS The ESI-MS methodology presented in this study enables us to investigate the interactions of saikosaponins with Cyt c, and allows the direct determination of binding constants. These results could guide further research for providing insights into the structure-binding relationship of ligands with Cyt c. Copyright © 2012 John Wiley & Sons, Ltd.
研究领域:
生物化学
·
药物学
✓ 已验证
DOI
高影响因子
Frontiers of Materials Science
·
2025
·Vol. 19
·期 1
·1-13
·
IF 2.3
Zhao Jingkun,Yao Shuaikang,Huang Yingjie,Gao Siyu,Zhai Shangru,An Qingda,Xiao Zuoyi,Zhang Feng
It is undoubtedly a challenge to design an efficient and recyclable photocatalyst for the degradation of tetracycline (TC). In this study, a MoS 2 @C composite catalyst was fabricated through the simple sulfurization of alginate-based spheres encapsulating ammonium molybdate by thiourea. The incorporation of porous carbon as a co-catalyst significantly augmented reactive active sites, endowing it with great specific surface area and effectively preventing the aggregation of MoS 2 nanoparticles. While offering abundant catalytic sites for the reaction, the structure with interconnected channels promoted the adsorption of the reactant. The MoS 2 @C composites showed excellent photocatalytic performance, achieving a photodegradation ratio of 87.01% for TC within 60 min, superior to that of pure MoS 2 . Additionally, the photocatalytic mechanism for the degradation of TC was also investigated through free radical trapping experiments in combination with the electron spin resonance technique.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Materiomics
·
2024
·
IF 8.4
Chengwan Yang,Kewei Li,Mengen Hu,Xinyang Li,Ming Li,Xiaoye Hu,Yue Li,Zhulin Huang,Guowen Meng
Carbon-based materials, renowned for their low density, adjustable electrical conductivity, superior corrosion resistance and mechanical properties, and have found extensive applications in the field of electromagnetic wave absorption (EMWA). Despite their merits, the current EMWA and thermal insulation capabilities are not fully optimized, thereby restricting their applications in the aerospace sector. Herein, we introduce a combinatory methodology employing electrospinning followed by pyrolysis to in-situ integrate ZrO 2 and ZrB 2 nanoparticles onto the surface of carbon nanofibers, culminating in a flexible ZrO 2 /ZrB 2 /C nanofiber felt. The integration of ZrO 2 and ZrB 2 nanoparticles significantly augments impedance matching and promotes multifaceted scattering and interfacial polarization. Consequently, the ZrO 2 /ZrB 2 /C nanofiber felt demonstrates a minimum reflection loss (RL min ) of –54 dB and the effective absorption bandwidth (EAB, RL≤–10 dB) is 3.1 GHz. Moreover, the three-dimensional porous architecture and the presence of multiple heterogeneous interfaces endow the ZrO 2 /ZrB 2 /C nanofiber felt with an ultralow thermal conductivity of 0.016 W⸱m −1 ⸱K −1 at 1100 °C, underscoring its exceptional potential for infrared stealth. This work shows considerable guiding significance for the design of bi-functional EMWA materials with ultralow thermal conductivity in aerospace field.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Xiaofeng Shi,Lei Wang,Lin Chen,Qiaoling Xu,Zhengting Du,Deqing Shi,Zhenfa Zi,Renchao Che
Chain-like magnetic-dielectric composites have become an ideal choice for electromagnetic (EM) wave absorption materials due to their excellent component adjustment and structural optimization. Here, the chain-like CoNi@C heterojunction was obtained via multi-step reaction combining the solvothermal reaction, polymerization reaction, and annealing treatment. Magnetic chain-like CoNi alloy was firstly synthesized under application magnetic field, where offered the polymerization surfaces for the dopamine monomer. Then, as-prepared CoNi@PDA composites were undergoing the annealing treatment at N 2 atmosphere to obtain the chain-like CoNi@C heterojunction. The EM parameters and impedance match properties of the CoNi@C composites can be efficiently regulated via tunning the carbon shell. Combining with the magnetic-dielectric balance and synergy loss absorption, chain-like CoNi@C heterojunction exhibited outstanding EM wave performance. Optimized CoNi@C-7 heterojunction exhibited the minimum reflection loss (RL min ) value can reach to −50.3 dB at 11.92 GHz when the thickness is 1.95 mm and the effective absorption bandwidth (EAB) can up to 4.16 GHz from 13.84 GHz to 18 GHz at only 1.5 mm thickness. Therefore, the chain-like magnetic-dielectric CoNi@C composites provided a new design ideal to fabricate the EM wave absorption materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2019
·Vol. 7
·期 2
·394-401
·
IF 5.934
Yushan Luo,Mengli Tao,Jianhua Deng,Renming Zhan,Bingshu Guo,Qianru Ma,Muhammad Kashif Aslam,Yuruo Qi,Maowen Xu
K-ion batteries (KIBs) are considered as one of the most promising devices for large-scale energy storage because of the comparable output voltage with lithium-ion batteries and the abundant reserves of potassium. FeS2 is regarded as a kind of very important anode material for KIBs due to its low cost and high capacity. However, the poor electronic conductivity and huge volume expansion of FeS2 during the discharge/charge process strongly inhibit the K-storage performance. To solve these problems, herein, unique core–shell FeS2@C nanocubes with nanoparticles in the interior and carbon shells in the exterior are designed. The inside FeS2 nanoparticles are beneficial for K+ diffusion and the penetration of the electrolyte, while the outside carbon shells can enhance the electronic conductivity and suppress the volume expansion. The unique core–shell structure displays outstanding K-storage performance with impressive specific capacity, excellent cycling stability, and superior rate capability with 73% capacity retention at 2 A g−1. This work not only provides solutions to obtain a superior anode material for KIBs but also offers insights into designing a hierarchical structure for energy storage systems.
研究领域:
材料科学
·
能源化学
·
纳米技术
·
电化学储能
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）