JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2026
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IF 5.3
Fan Shi,Tao Liu,Wei Zhao,Brij Mohan,Qing Liu,Xiaojiao Li,Lijun Yan,Wei Sun
Scopoletin, a bioactive compound with important physiological and pharmacological effects, lacks a simple and rapid method for real-world detection. In this paper, graphdiyne quantum dots (GDYQDs) were prepared via a one-step ultrasonication method and subsequently combined with N-doped graphene (NGR). The GDYQDs/NGR composite was drop-coated onto a screen-printed electrode (SPE) to fabricate GDYQDs/NGR-modified SPEs, integrated with a portable electrochemical workstation and Bluetooth-enabled smartphone for real-time, wireless detection of scopoletin. Beyond experimental performance, density functional theory (DFT) calculations and partial density of states (PDOS) analyses were conducted for three model substrates (I: GDYQDs, II: NGR, III: GDYQDs/NGR) and three adsorption configurations (1: O–H adsorption, 2: carbonyl O toward substrate, 3: parallel π-adsorption). Adsorption energies indicate the π-adsorption configuration as the most stable across all substrates. PDOS analysis shows a pronounced downshift of the molecular p-state upon adsorption, most notably on the GDYQDs/NGR substrate, indicating stronger electronic coupling and stabilization of adsorption complexes. Collectively, these results demonstrate a cooperative GDYQDs–NGR effect that enhances scopoletin adsorption via π–π interactions and electronic coupling, providing molecular-level guidance for designing high-performance GDYQDs/NGR-based on-site electrochemical sensors.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2026
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IF 4.1
Liang Hao,Liu Jingjing,Pei Hebing,Guo Ruibin,Mo Zunli,Liu Nijuan
Rapid detection of tryptophan (Trp) enantiomers has been a research hotspot in pharmaceuticals, life sciences, and related fields. Herein, N, S-doped carbon dots (N, S-CDs) and chiral ionic liquid (CIL) were used to functionalize the glassy carbon electrode (GCE), constructing a simple electrochemical sensor (N, S-CDs/CIL/GCE) for the efficient recognition of Trp enantiomers. CIL not only provides a chiral microenvironment but also synergistically amplifies electrochemical signals through electrostatic interactions with N, S-CDs, while enhancing interfacial electron transfer efficiency. Differential pulse voltammetry (DPV) analysis indicates that with an 8.0 μL loading volume and pH 6.0, the N, S-CDs/CIL/GCE achieves the maximum enantiomeric selectivity coefficient ( I L / I D = 2.12) for L-Trp versus D-Trp. Moreover, it exhibits excellent stability and shows high selectivity toward Trp enantiomers even in the presence of common interfering substances, with detection limits of 0.035 mM and 0.084 mM for L-Trp and D-Trp, respectively (1.5 to 3.5 mM). Mechanistic investigations suggest that the DPV signal difference may stem from the stereoselectivity of N, S-CDs/CIL toward tryptophan isomers, as its affinity for L-Trp is higher than for D-Trp. Furthermore, the N, S-CDs/CIL/GCE exhibits significant potential for distinguishing amino acid isomers in non-racemic mixtures. This study offers new insights into the development of chiral compound sensors and bioanalytical strategies. Graphical
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2026
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IF 5.2
Yanpeng Zhang,Pinru Wang,Maoshu Yin,Yilong Duan,Taojin Chen,Mengmeng Lun,Min Sun,Lijie Sun,Nantao Hu,Liying Jiang,Zijiong Li,Bin Li
With the rapid development of wearable electronics, the key challenge of existing flexible energy storage devices is their low energy density, limited cycling ability, and safety concerns associated with carbon cathode materials and conventional electrolyte systems. In this paper, we present a strategy in which the MXene nanosheets and nitrogen-doped graphene (N-RGO/MXene) heterostructure are employed to assemble a flexible zinc-ion asymmetric supercapacitor (FZASC) using Zn(CF 3 SO 3 ) 2 /PVA as gel electrolyte. The MXene/N-RGO heterostructure composite forms a three-dimensional (3D) conductive network that facilitates the rapid deposition and transport of Zn 2+ . The quasi-solid-state FZASC with N-RGO/MXene heterostructure anode exhibits the highest capacitance of 133.53 F g −1 at 0.2 A g −1 , average energy density of 36.35 Wh kg −1 , and a power density of 140 W kg −1 , respectively. Notably, the prepared flexible FZASC exhibits a capacity retention of 84.67% after 10000 cycles at 6 A g −1 , with a coulombic efficiency approaching 100% and excellent mechanical flexibility under different bending angles and bending cycles. Moreover, the quasi-solid-state FZASC can keep an LED light illuminated for several minutes. The design strategy and performance metrics provide guidance for next-generation, flexible, and safe quasi-solid-state FASCs with high performance and long-duration stability, exhibiting great potential in energy-storage applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Xiaoli Guo,Zhuguang Nie,Jinqiu Chen,Xiaonan Yang,Jiahui Chen,Rumin Wang,Shuhua Qi
Lightweight electromagnetic wave absorbing (EMA) materials with low filler loading and environmental adaptability are highly desirable for next-generation electromagnetic protection. Herein, a multilevel MoS 2 /CoNi@helical carbon nanotubes/N-doped hollow carbon foam (MCNC) was constructed for efficient EMA. Helical carbon nanotubes generated under controlled high-temperature conditions introduce chiral and tortuous conductive pathways within the 3D hollow carbon framework, promoting multiple scattering and dielectric loss. The incorporation of MoS 2 interrupts the excessively continuous conductive network, thereby improving impedance matching, while the conductivity and electronic structure differences between MoS 2 and the carbon framework enhance interfacial polarization through charge separation. Benefiting from the synergistic effects of geometric regulation and heterointerface engineering, MCNC achieves a minimum reflection loss of −51.90 dB and a maximum effective absorption bandwidth of 6.32 GHz at an ultralow filler loading of 5 wt%. In addition, MCNC exhibits a surface temperature of 139.0 °C under near-infrared irradiation and excellent corrosion resistance in simulated seawater. This work provides an effective strategy for developing low-loading and multifunctional EMA materials through multilevel structural and interfacial design.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2026
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IF 8.7
Bingqian Zhou,Yin Yang,Renshun Zeng,Kaize Ju,Jiayin Li,Jingjing Hu,Ke Chen,Shiwei Jin,Laiyan Wu
PPDs caused static fluorescence quenching of PEP. • PPDs alter the microenvironment and hydrophobicity of amino acid residues in PEP. • PPDs bind to PEP via hydrophobic interactions and hydrogen bonds. • N-substituent structural variations may affect PEP binding and subsequent functional effects. Herein, the interaction mechanisms between pepsin (PEP) and two p -phenylenediamine derivatives, DPPD and CPPD, were investigated via multi-spectroscopic, computational, and enzymatic methods. UV–vis absorption spectroscopy, fluorescence spectroscopy, and time-resolved fluorescence confirmed the formation of ground-state complexes with a static quenching mechanism. Binding constant analysis revealed a stronger, more endothermic, and entropy-driven binding of CPPD compared to DPPD, primarily driven by hydrophobic forces. Both compounds induced secondary structural changes in PEP, evidenced by an increase in β-sheet and a decrease in α-helix. Crucially, DPPD and CPPD exerted distinct effects on PEP conformation. Molecular dynamics simulations showed DPPD binding stabilized PEP's structure while CPPD increased its flexibility. Molecular surface electrostatic potential (MESP) analysis rationalized these differences: CPPD's more polarized and extensive electrostatic field, stemming from its asymmetric cyclohexyl substituent, fostered stronger interactions but greater structural perturbation. These structural changes provided a direct rationale for the observed inhibition of PEP's enzymatic activity, where DPPD, despite weaker overall binding, induced specific active-site changes causing more pronounced inhibition. The antioxidant activities of both ligands decreased upon complexation. This study elucidates how subtle ligand structural differences dictate binding modes and functional outcomes in protein-ligand systems.
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Journal of Building Engineering
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2026
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IF 8.1
Yuxuan Wang,Liguo Wang,Shan Gao,Han Wang,Liqun Lu,Zhiyong Liu,Fengjuan Wang,Mengying Yang,Jinyang Jiang
SiO 2 @n-OD microcapsules showed high latent heat and leakage resistance. • MWCNTs and CNFs improved pore structure and interfacial continuity. • Repeated cycling confirmed stable short-term thermal buffering. • SiO 2 shells and carbon nanomaterials balanced thermal and mechanical performance. Cementitious composites incorporating phase change materials usually suffer from a trade-off between latent-heat storage and mechanical integrity, mainly because organic PCMs behave as soft inclusions and introduce additional thermal resistance. Here, we propose a synergistic strategy that combines SiO 2 -encapsulated n-octadecane microcapsules with one-dimensional carbon nanomaterials, including multi-walled carbon nanotubes (MWCNTs) and carbon nanofibers (CNFs), to improve the compatibility between thermal functionality and cement-matrix performance. SiO 2 @n-OD microcapsules were prepared by a sol–gel route, and the optimized M2 microcapsules showed a latent heat of 170.12 J/g, good leakage resistance, and stable phase-change behavior after repeated heating–cooling cycles. The addition of 10 wt% microcapsules reduced the 28 d compressive strength from 37.8 MPa for the reference paste to 20.8 MPa because of the soft inclusion effect, weak interfacial regions, and increased pore defects. Introducing 0.5 wt% carbon nanomaterials markedly compensated for this deterioration. In particular, the composite modified with 0.5 wt% CNFs reached a 28 d compressive strength of 38.5 MPa, corresponding to 104.1% compensation of the strength loss caused by microcapsule incorporation. This recovery was supported by improved hydration response, reduced mercury-accessible pore volume, better interfacial continuity, and possible fiber-bridging effects. In the short-term laboratory-scale heating–cooling cycling test, the optimized composite maintained a stable thermal-buffering effect, with a maximum average temperature difference of 6.38 ± 0.17 °C relative to the reference panel. These results suggest that coupling SiO 2 -encapsulated PCMs with one-dimensional carbon nanomaterials is a feasible strategy for balancing latent-heat storage, mechanical compensation, and thermal regulation in cementitious composites.
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ChemistrySelect
·
2025
·Vol. 10
·期 25
·e01361
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IF 2
Yuyue Zhang,Beibei Hu,Xianqi Wang,Hongzhe Tian
Graphical The toxicity of carbon dots synthesized using cholinium bitartrate against Chlorella vulgaris was assessed.The carbon dots with low concentration present low toxicity to microalga.The oxidative stress and cell damage were the main toxic mechanisms of carbon dots to green alga. Carbon quantum dots (CQDs) are considered as eco-friendly nanomaterials and suitable alternatives for traditional metal quantum dots. However, their high hydrophilicity and nanoscale size of CQDs pose a significant risk to aquatic organisms considering their widespread application. In this study, Chlorella vulgaris was selected as a model organism to assess the ecotoxicity of CQDs synthesized using choline bitartrate via a pyrolysis method. The effects of the CQDs on algal growth, antioxidant activity, photosynthetic pigment, and malondialdehyde levels have been extensively studied. Algal growth was inhibited by CQDs with a median effective concentration (EC 50 ) > 271 mg/L. After 4 days of exposure, chlorophyll content, respiratory rate, and protein content of the green alga declined by 14.0–91.75%, 73.4% and 24.4%, respectively. The CQDs caused excessive accumulation of reactive oxygen species (ROS) in Chlorella vulgaris and induced oxidative stress and physical damage to the algal cells. Our findings contribute to the potential application and risks assessment of the CQDs.
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Frontiers in Energy Research
·
2025
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IF 2.4
Tianjiao Huang,Wu Xia,Fnu Joshua,Vaishnavii Subbiah Ponnusamy,Qipeng Zhang,Sachin Kumar,Ao Yu
Rational interfacial engineering is crucial to designing non-precious electrocatalysts for the hydrogen evolution reaction (HER). Here we report a Cu3N/1T-MoS2 heterojunction in which ultrathin 1T-MoS2 nanosheets are conformally grown on conductive p-type Cu3N nanocubes. Spectroscopy and microscopy reveal intimate lattice contact and interfacial strain, while XPS indicates charge redistribution across the junction. In 0.5 M H2SO4, the optimized 1:1 composite delivers an overpotential of 387 mV at 50 mA cm−2 and a Tafel slope of 57 mV dec−1, outperforming both constituents (MoS2 ≈ 456 mV; Cu3N inactive at this current density). Continuous operation for 150 h demonstrates excellent acid stability. Electrochemical impedance and double-layer capacitance analyses show the lowest charge-transfer resistance and the highest electrochemically active surface area among all samples (Cdl = 103.6 mF cm−2), corroborating rapid electron transport and abundant accessible sites. The activity enhancement arises from a p–n heterojunction with a built-in field that promotes directional electron flow to MoS2 active edges, together with strain-induced defect exposure. This work identifies Cu3N as an effective platform to stabilize conductive MoS2 and provides design rules for interface-engineered HER catalysts.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Hengyi Lu,Huanxiao Li,Chuyang Liu,Jiayi Shao,Fangqi Guo,Xiang Tian,Xiaopeng Li,Pan Ying,Yujing Zhang,Guangbin Ji
To tackle the complex electromagnetic pollution from advances in radar and network technologies, a simple, low-cost, and efficient absorbing agent has been developed. By optimizing the high-temperature sintering of the melamine/reduced iron powder composite system, we successfully created a Fe-C-N multiphase composite material with multi-level structure and dielectric-magnetic loss properties. The gas produced by the decomposition of melamine at high temperatures fosters the formation of a pore structure. Additionally, controlling the heating temperature and holding time effectively manages the phase transition path, allowing for synergistic evolution of the microstructure and regulation of the microwave-absorbing properties. The analysis of SEM images and XRD results identifies the synergistic enhancement mechanism between the multi-level structure and multi-phase. This endows a reflection loss of -75.91 dB at 5.16 GHz for samples held at 700°C for 3 hours (thickness 4.4 mm), with a maximum bandwidth of 4.92 GHz (1.6 mm). It avoids the traditional multi-step process of carbon/nitrogen doping, effectively regulating the phase transition path and microstructure evolution. This provides a new approach to develop lightweight, broadband microwave absorbing materials.
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ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Changlei Xia,Hongjie Chen,DongDong Wang,Shilei Ding
The development of highly efficient and stable bifunctional catalysts is of crucial importance for advancing the large-scale application of zinc-air batteries (ZABs). This present study introduces a composite catalyst composed of cobalt-based sulfides supported on nitrogen-doped graphene (Co@NG-S2), synthesized through a two-step sulfurization strategy. The first sulfurization stage was successful in achieving co-doping of sulfur (S) and nitrogen (N) while enhancing the conductivity and activity of the graphene support. The second sulfurization step promoted the uniform distribution of cobalt-based sulfides and strengthened their interfacial coupling with graphene, thereby significantly improving their bifunctional catalytic performance. Electrochemical characterization revealed that Co@NG-S2 exhibited an oxygen reduction reaction (ORR) onset potential of 0.868 V and a half-wave potential (E 1/2 ) of 0.798 V (vs. RHE). For the oxygen evolution reaction (OER), Co@NG-S2 demonstrated a low overpotential of merely 430 mV at a current density of 10 mA cm -2 , thereby demonstrating exceptional ORR/OER bifunctional activity. In addition, a liquid ZAB assembled with this catalyst achieved a peak power density of 110 mW cm -2 and exhibited cycling stability exceeding 200 hours. This study proposes a novel strategy for the synthesis of high-performance transition metal sulfide-carbon-based catalysts, demonstrating considerable promise for future applications.
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Acta Biomaterialia
·
2025
·
IF 9.6
Zhizi Ma,Zhuang Yang,Jie Ma,Sainan Liu,Qi Meng,Wenying Zhang,Ziyong Cheng,Zhangfeng Wang,Abdulaziz A. Al Kheraif,Ping’an Ma,Jun Lin
With the deepening of research of sonodynamic therapy (SDT), it is shown that the efficacy of single component and single functional sonosensitizers is not satisfactory. Therefore, this study utilized multihole TiO 2 @Ag 2 O (TA) as sonosensitizer to achieve synergetic SDT and sonothermal therapy (STT) under US irradiation. As a p-n nanoformulation, the construction of TA is conducive to generate a built-in electric field and lead to energy band bending, which are efficient in separating electrons and holes. Besides, it can promote carrier relaxation between the different energy bands to produce abundant phonons, inducing lattice thermal vibration and realizing the conversion of mechanical energy to thermal energy. Moreover, the feasibility of enhancing cavitation effect for improving sonothermal capability is demonstrated for the first time. When TA enters tumor cells under US irradiation, plentiful ⚫OH and 1 O 2 are generated to attack mitochondria, causing dysfunction, disrupting energy supply and damaging DNA, thereby inducing apoptosis. Meanwhile, TA can also cause rapid local heating of surrounding environment to kill tumor cells by lattice thermal vibration and cavitation bubbles bursting on its surface. Obviously, this work effectively achieves both heterojunction enhanced SDT, and carrier relaxation and cavitation effect promoted STT combined anti-tumor therapy through designing multihole p-n TA. Statement of Significance None
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SYNTHETIC METALS
·
2025
·
IF 4.6
Ran Xu,Man He,Haoyuan Li,Shuangjiang Feng,Yongjuan Wang,Xiaohai Bu,Yuming Zhou
The strategy of customizing MOF-derived electromagnetic wave (EMW) absorbing materials through the construction of precursor size has become a new research direction. While exploring the dimensional adaptability of Co-MOF derivatives in graphene hybrid aerogel for electromagnetic wave absorption is not widely researched, manipulating the compositions and microstructures of EMW absorbing materials has been found to afford superior EMW absorption. Herein, a series of Co-N/C@graphene hybrid aerogel (CNGA) were successfully synthesized by integrating graphene and multi-scale Co-MOF derivatives which are derived from multi-scale Co-MOF precursors. The results displayed the CNGA containing nanoscale Co-MOF derivatives at a 20 wt% filler ratio exhibited the optimal reflection loss (−46.8 dB, 2.7 mm) and the maximum effective absorption bandwidth (5.3 GHz, 2.1 mm). The exceptional EMW absorption properties are credited to the collaborative impact of distinctive loss mechanisms benefited from the small particle size of Co-MOF derivatives in CNGA and appropriate filler ratio. This work demonstrates the correlations between the size of Co-MOF derivatives and electromagnetic parameters of CNGA, and provides a guidance for the development of advanced hybrid aerogel electromagnetic wave absorbing materials.
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