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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PubMed
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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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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 19.7
Jing Zhang,Yixuan Gao,Hongna Li,Sihui Zhan
B–N doping disrupts π-conjugation and localizes electrons in biochar. • B–N sites and carbon vacancies promote axial electron transfer and PMS adsorption. • BN-Cv-Biochar enables highly selective 1 O 2 generation and rapid SMX degradation. • BN-Cv-Biochar/PMS system markedly reduces the phytotoxicity of treated water. Selective activation of peroxymonosulfate (PMS) to produce singlet oxygen ( 1 O 2 ) is desirable for efficient water purification. Graphitized biochar is a promising catalyst, but its extended π-conjugated structure favors in-plane charge delocalization and hinders axial electron transfer, leading to low 1 O 2 selectivity. Herein, we fabricated a boron-nitrogen (B–N) conjugated doped carbon-vacancy biochar (BN-Cv-Biochar) to modulate the local π-electronic system. B–N doping breaks the extended π-conjugation, creating polarized active sites and localized electrons that strengthen axial electron transfer and selective PMS adsorption. The degradation rate constant of sulfamethoxazole (SMX) of BN-Cv-Biochar is 1.68 and 4.45 times higher than that of pristine (Biochar) and nitrogen-doped carbon-vacancy biochar (N-Cv-Biochar), respectively. Experimental and theoretical results reveal that B–N sites coupled with carbon vacancies optimize the electronic environment, reduce the energy barrier for 1 O 2 generation, and preferentially promote 1 O 2 -dominated PMS activation. Product analysis clarifies the SMX degradation pathway, and toxicity assays using radish seedlings confirm the reduced toxicity of treated water. This work provides a novel strategy to tune the π-conjugated structure of biochar for high-performance carbon catalysts in advanced oxidation processes. Download: Download high-res image (201KB) Download: Download full-size image
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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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Journal of Energy Storage
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2026
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IF 10.7
Shang Wu,Qiyue Tong,Huize Zhang,Zhenyang Yu,Chenxu Zhu,Qiong Su,Hong Zhang,Guihua Li,Xiaojun Yang,Juzhen Kang,Quanlu Yang
NH 2 -UIO-66 has been regarded as a promising porous material owing to its high specific surface area and structural stability, although its limited conductivity restricts its application in supercapacitors. In this work, a NiCo 2 S 4 /NH 2 -UIO-66 nanoflower composite (NCS/NU) was synthesized via a vulcanization process with thioacetamide. Electrochemical measurements conducted in a three-electrode system revealed that the composite delivered a specific capacitance of 172.4 mAh g −1 at 1 A g −1 and maintained 82.1% of its initial capacitance after 5000 cycles at 5 A g −1 . Morphological characterization indicated that the nanoflower architecture was largely preserved after sulfurization. The in-situ formed NiCo 2 S 4 contributed to enhanced pseudocapacitance and induced surface wrinkling of the petals, which helped stabilize the composite structure supported by NH 2 -UIO-66. For the anode, S and N co-doped three-dimensional porous carbon (SNC) was prepared via a sol-gel method followed by stepwise high-temperature carbonization using ammonium persulfate as the activator. A hybrid supercapacitor was subsequently assembled with the NCS/NU as the positive electrode and SNC-700 as the negative electrode. The device delivered an energy density of 28.8 Wh kg −1 and retained 74.1% of its initial capacitance after 5000 charge-discharge cycles.
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JOURNAL OF FLUORESCENCE
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2026
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IF 3.4
Liu Tianhui,Yan Yiling,Chen Zhenni,Zhao Chengfei
In recent years, fluorescent sensors based on carbon quantum dots (CQDs) have been widely reported for pharmaceutical detection owing to their numerous advantages. In this study, a Fe³⁺-mediated fluorescence “off–on” sensor based on nitrogen-doped carbon quantum dots (N-CQDs) was developed for the selective detection of tiopronin (TPN). Briefly, highly fluorescent N-CQDs were synthesized via a one-step hydrothermal method using citric acid monohydrate and diethylenetriamine. XPS, FT-IR, UV-Vis, fluorescence spectroscopy, and DLS confirmed that the N-CQDs exhibit uniform size, aqueous stability, excitation-independent fluorescence, and a high quantum yield of 62.99%. Fe³⁺ selectively bound to N-CQDs to form a complex, resulting in fluorescence quenching. Subsequently, upon the addition of TPN, the fluorescence of N-CQDs showed a proportional recovery. During this process, the competitive coordination between TPN and Fe³⁺ led to the release of Fe³⁺ from the N-CQDs, thereby restoring the quenched fluorescence. The limit of detection (LOD) of TPN was 80 μmol/L, with a linear range of 0.2–0.7 mmol/L and an R² value of 0.9993. The content of TPN in enteric-coated tablets was quantified using this method, yielding recovery rates ranging from 92.59% to 104.22%. This method is simple, rapid, and reliable, offering good sensitivity without the need for expensive reagents or complex equipment. Graphical The alternative text for this image may have been generated using AI. Schematic illustration of the synthesis of N-CQDs and their application as an “off–on” fluorescent probe for TPN detection via Fe³⁺-mediated
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Gels
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2026
·Vol. 12
·期 4
·271
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IF 6.4
Tianji Li,Delong Dai,Luohui Wang,Minghui Zhao,Lianfeng Shen,Youming Dong,Fei Xiao,Cheng Li,Jianwei Zhang
In order to achieve rapid and qualitative detection of soluble heavy metal ions, nitrogen-doped fluorescent carbon quantum dots (N-CQDs) were synthesized using chitin extracted from shrimp and crab shells as the carbon source. The structural, morphological, and optical properties of the synthesized N-CQDs were systematically characterized using transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FTIR), Raman, X-ray photoelectron spectroscopies (XPS), ultraviolet-visible (UV-Vis) absorption spectroscopy and fluorescence spectroscopy. The resulting N-CQDs exhibited a carbonization yield of 54.46% and a fluorescence quantum yield of 34.33%. Their morphology, structure and optical properties were thoroughly characterized using a range of analytical techniques. The synthesized N-CQDs exhibited excellent fluorescence properties, and remarkable stability. When applied for metal ion detection, the N-CQDs displayed a distinct and selective fluorescence quenching response exclusively toward Fe3+ions. The detection limit for Fe3+at room temperature was 4.04 μmol/L. Furthermore, due to the inherent nitrogen present in the acetyl amino groups of chitin, nitrogen doping was achieved without the need for external dopants during the hydrothermal synthesis process. Owing to their high stability, low cost and low toxicity, the N-CQDs synthesized in this study provide a promising fluorescence sensing platform with excellent selectivity for Fe3+detection, achieved through precise control of surface functional groups.
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ACS Catalysis
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2026
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IF 13.6
Guanyi Zhang,Zhihao Zheng,Na Liu,Lei Wang,Yongfang Xu,Dawei Wang,Xun Zhao,Zhitong Qian,Haisong Feng,Xin Zhang,Weiming Zhai,Feng Liu,Zhihai Hu,Yusen Yang
Abstract The aqueous-phase hydrodeoxygenation of biomass-derived fatty acids offers an alternative route for the production of diesel-range hydrocarbons, but remains a major challenge. Herein, we report a hydrophobic CoP catalyst anchored on P–N co-doped carbon spheres (CoP@PNC-900), which exhibits high performance for the aqueous-phase hydrodeoxygenation of palmitic acid at 270 °C and 2 MPa H2, delivering nearly complete conversion together with over 99% yield of C15+C16 alkanes. The enhanced performance arises from the synergy between CoP active sites and the hydrophobic interface, which promotes C–O bond cleavage while enhancing the contact between hydrophobic substrates and catalytic sites. Isotopic-labeling experiments demonstrate that water acts exclusively as the reaction medium rather than a hydrogen source. In situ FT-IR–MS analysis combined with DFT calculations confirms the hydrodeoxygenation- and decarbonylation-related pathways, with C–O bond cleavage of the alcohol intermediate identified as the rate-determining step in the hydrodeoxygenation pathway. Moreover, the catalyst exhibits a broad substrate scope for various fatty acids and esters as well as stable recyclability under hydrothermal conditions. Finally, a preliminary life cycle assessment (LCA) highlights the potential environmental benefits of the aqueous-phase catalytic process. This work establishes an effective strategy that integrates active-site engineering with interfacial hydrophobic microenvironment regulation for the aqueous-phase valorization of biomass-derived fatty acids.
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ACS Applied Materials & Interfaces
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2026
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IF 7.8
Xiang Liu,Mutian Zhang,Wei Zheng,Junjiang Fan,Miaoxi Guo,Li Yang,ZhengMing Sun,Guobing Ying
Aqueous ammonium-ion batteries are promising for safety, low cost, and fast energy storage. However, the influence of electrode surface chemistry on NH4+ storage remains poorly understood. Two-dimensional Ti3C2Tx MXene, with metallic conductivity, tunable interlayer spacing, and abundant surface terminations, serves as an ideal platform to elucidate NH4+ storage mechanisms. Herein, the role of MXene surface termination in regulating NH4+ storage behavior is systematically investigated using density functional theory calculations and experimental validation. The calculations reveal that the -N terminations offer moderate NH4+ adsorption and high electronic conductivity for rapid charge transfer and ion transport, whereas the -O terminations exhibit stronger ion affinity and enhanced surface stability. Importantly, the mixed -N/-O terminations effectively balance adsorption strength and transition-state stabilization, resulting in the lowest NH4+ migration barrier among the modeled pathways. The calculations employ idealized vacuum-separated surfaces with isolated NH4+ and do not explicitly include solvation or electrolyte effects. Guided by these findings, a mixed -N/-O terminated Ti3C2Tx MXene is constructed via a urea-assisted hydrothermal strategy. The optimized NTC-20 electrode delivers 107 mAh g-1 at 1 A g-1, retains 67% capacity at 10 A g-1, and maintains 91% capacity after 10,000 cycles. Ex situ XRD, XPS, and FTIR analyses are consistent with reversible NH4+-associated changes in the local chemical environment and possible storage involving Ti-N···H-N and Ti-O···H-N interactions. Furthermore, the NTC-20//MnO2/CNTs full cell achieves an energy density of 26.7 Wh kg-1 at 1.3 kW kg-1. The results support a dominant role for mixed -N/-O terminations in regulating NH4+ adsorption and diffusion, providing insights into surface-termination engineering for high-performance AAIBs.
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高影响因子
ACS Applied Nano Materials
·
2026
·
IF 5.8
Zihan Zhang,Yang Kang,Xuan Li,Wushuang Bao,Liuan Li,Longtao Yang,Wei Chen,Xin Liu,Yuanmin Luo,Wengang Gu,Yang Li,Reza Taheri Ghahrizjani,Zongzhi Yin,Junsong Cao,Haiding Sun
Abstract Photoelectrochemical sensing within complex biochemical environments typically necessitates the simultaneous determination of multiple analytes, as single-parameter measurements provide limited information. However, most existing biosensing platforms encode analyte information within a single signal dimension, which restricts their ability to achieve intrinsic multiplexing. Here, we report a polarity-encoded photoelectrochemical biosensing platform based on a wavelength-resolved p-AlGaN/n-GaN heterojunction. In this system, photocurrent polarity functions as an additional signal dimension beyond conventional amplitude-based encoding. The device exhibits illumination-dependent polarity switching, enabling analyte-specific signal transduction. Regulation of carrier transport across the heterojunction generates bipolar photoresponses, in which polarity determines analyte identity while current amplitude remains proportional to concentration. This mechanism enables wavelength-resolved dual-analyte detection on a single electrode, as demonstrated by the selective discrimination of glucose and hydrogen peroxide under different illumination conditions. Moreover, surface modification with RuO2 enhances interfacial charge-transfer kinetics and improves carrier utilization efficiency, leading to amplified bipolar signals and improved detection performance. The system achieves sensitivities of 723 μA mM−1 cm−2 and 0.11 mA mM−1 cm−2 for hydrogen peroxide (H2O2) and glucose, respectively. This work establishes a polarity-resolved signal-encoding strategy for intrinsically multiplexed photoelectrochemical biosensing.
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