MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Chunyan Ren,Guoliang Ding,Mengru Chen,Xiaojun Chen,Gang Peng
Carbon material derived from lotus petiole exhibits enzyme-like activity. • The multiple enzyme-like activities of Cu@C-AuNPs can be switched by pH. • A colorimetric-electrochemical dual-mode aptasensor was successfully constructed. • The sensor provides a detection limit as low as 4.35 × 10 −6 ng mL −1 . • The developed method is suitable for controlling AFB1 in rice. Rapid and reliable detection of aflatoxin B1 (AFB1) is of paramount significance for food safety control and public health protection. Herein, a novel lotus petiole-derived pH-switchable Cu@C-AuNPs nanozyme featuring versatile enzyme-like activities was rationally engineered to fabricate a dual-mode colorimetric-electrochemical aptasensor for the ultrasensitive and selective detection of AFB1. Benefiting from its sharp pH-switchable catalytic behavior, the as-prepared nanozyme displays prominent peroxidase-like activity under acidic conditions (pH 4.0), efficiently catalyzing H 2 O 2 -mediated oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to enable visual colorimetric readout; in contrast, it switches to distinct catalase-like activity under neutral conditions (pH 7.4), decomposing H 2 O 2 to generate oxygen and thereby producing quantifiable electrochemical signals. Under optimized experimental parameters, the colorimetric mode exhibits a linear response from 1 × 10 −2 to 1 × 10 3 ng mL −1 with a limit of detection (LOD) of 6.96 × 10 −3 ng mL −1 , whereas the electrochemical mode achieves a broader linear range of 1 × 10 −5 to 1 × 10 3 ng mL −1 with a superior LOD of 4.35 × 10 −6 ng mL −1 . This dual-signal sensing strategy not only furnishes a robust and accurate platform for AFB1 detection but also holds promising application prospects in on-site and laboratory-grade food safety monitoring. A lotus petiole-derived Cu@C-AuNPs nanozyme with pH-switchable activities enables dual-mode detection of aflatoxin B1. At pH 4.0 (colorimetric), peroxidase-like activity oxidizes TMB to oxTMB, giving an absorbance increase (LOD 6.96 × 10 −3 ng mL −1 ). At pH 7.4 (electrochemical), catalase-like activity decomposes H 2 O 2 to O 2 , producing a current decrease (LOD 4.35 × 10 −6 ng mL −1 ). This aptasensor provides reliable cross-validation for food safety monitoring. Download: Download high-res image (177KB) Download: Download full-size image
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高影响因子
ENVIRONMENTAL RESEARCH
·
2026
·
IF 8.2
Minghuan Wang,Hekai Zhang,Yunfei Song,Yilei Zhu,Yaning Zong,Peng Wei,Zheng Guo,Li Yin,Jianwei Fu
s The practical application of metal-organic framework (MOF)-derived catalysts in advanced oxidation processes (AOPs) is often hindered by challenges in recoverability and stability in complex water matrices. To overcome these limitations, we developed a scalable strategy to fabricate N-doped carbon nanofibers with coexisting atomic Co sites and metallic Co nanoparticles (Co-N/C) by electrospinning a ZIF-67/polyacrylonitrile (PAN) composite followed by controlled pyrolysis. This integrated design yields a catalyst with a hierarchical porous structure and a high specific surface area (317.55 m 2 g -1 ), which synergistically enhances mass transfer and exposes abundant active sites. The optimized Co-N/C catalyst demonstrates ultrafast catalytic activity, achieving over 98% degradation of methylene blue (MB) within 5 minutes via efficient peroxymonosulfate (PMS) activation. Mechanistic studies, supported by quenching experiments and density functional theory (DFT) calculations, reveal that the degradation proceeds via a nonradical-dominated pathway, with singlet oxygen ( 1 O 2 ) generated through interfacial electron transfer playing the primary role, while sulfate (SO 4 • - ) and hydroxyl (•OH) radicals from Co 2+ /Co 3+ redox cycling serve a secondary function. The catalyst exhibits excellent operational robustness, maintaining high efficiency (>92%) across a broad pH range (3-9) and showing remarkable reusability with minimal activity loss over five consecutive cycles. Furthermore, ecological structure-activity relationship (ECOSAR) modeling indicates a significant reduction in the environmental toxicity of the degradation intermediates. This work provides not only an effective and eco-friendly candidate for dye wastewater remediation but also fundamental insights into the rational design of MOF-derived functional materials for superior, nonradical-predominant AOPs.
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PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Rana Ali Ahmad,Yijin Wu,Zenglong Wu,Junxian Liu,Tengxiu Tu,Yongying Tian,Zhixian Mao,Jian Kang,Shan Chen,Huajie Yin
All inorganic molten salt electrolytes (MSEs) are attractive for electrochemical energy storage but typically require elevated operating temperatures due to high melting points normally exceeding 120°C. Here we report a low-melting, quinary molten salt electrolyte comprising AlCl 3 , NaCl, KCl, KOH, and LiCl (ANKKL; molar ratio 0.6:0.2:0.2:0.15:0.2) that remains liquid at near 60°C. The incorporation of multiple salt components increases configurational entropy and promotes diverse complex solvation structures, which suppress crystallization and stabilize the molten phase at reduced temperature. ANKKL exhibits high ionic conductivity (∼0.15 S cm −1 at 75°C). Ab initio molecular dynamics and Raman spectroscopy confirm the formation of multiple Al-based complex anions (AlCl 4 − , Al 2 Cl 7 − , AlCl 3 OH − , and Al 2 Cl 6 OH − ), indicating a disordered ionic environment favorable for fast ion transport. Couple ANKKL with hierarchically ordered macroporous carbon electrode featuring interconnected micro/meso/macropores yields dual charge storage that combines electric double-layer capacitance and nanoconfinement-enabled pseudo-capacitance. Devices deliver 570 F g −1 and 87.5 Wh kg −1 at 1.3 kW kg −1 (75°C), as well as excellent capabilities of thermal re-cycling and self-discharge suppression, retaining ∼99% capacitance after 10 000 cycles. These results demonstrate that entropy-engineered multicomponent molten salts represent practical, thermally stable, and cost-effective electrolyte platform for high-energy supercapacitors operating below 100°C.
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高影响因子
ACS Omega
·
2026
·
IF 5.2
Thuy Trang T. Vuong,Vu Van Thang,Phuong Nam Le Pham,Phi Long Nguyen
The rapid increase of battery and carbon waste has raised an urgent demand for efficient recycling methods, along with the development of environmentally friendly energy storage materials. In this study, zinc ferrite (ZnFe2O4, ZFO) was synthesized from spent batteries, while graphene nanosheets (GNs) was obtained from recycled carbon, and then combined to form ZFO@G composites for supercapacitor applications. Characterization techniques including XRD, Raman, SEM, and electrochemical analyses (CV, GCD, EIS) were employed to elucidate the crystal structure, surface morphology, and electrochemical performance of the materials. The results reveal that the incorporation of GNs improves the electrochemical performance of ZFO, delivering a specific capacitance of 606.69 F g–1 at 1 A g–1 with a capacitance retention of ∼58.8% after prolonged cycling. This study not only demonstrates the potential of recycled materials for supercapacitor applications but also contributes to mitigating environmental issues caused by battery waste.
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PubMed
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Roshni Rahman,Mingsheng Luo
NiO-loaded g-C₃N₄ photocatalysts (1.5–13.5 wt %) were successfully synthesized. • 5.5NiO/g-C₃N₄ achieved the highest activity with 98 % CR degradation in 1 h. • NiO incorporation shifted the CB from −0.58 V to −0.68 V, improving charge transfer. • Band gap decreased from 2.91 eV (GCN) to 2.80 eV (5.5NiO/GCN). • Co-contaminants (NaCl, Na₂SO₄) reduced degradation efficiency to 80-93 %. In this work, NiO with various mass percentages (1.5%, 3.5%, 5.5%, 7.5%, 9.5%, 13.5%) was loaded on GCN to improve the photocatalytic degradation of CR and BPA. Among all prepared samples, the 5.5NiO/GCN composite displayed the highest photocatalytic activity, achieving 98% degradation of CR and 91% degradation of BPA within 1 h. Mott-Schottky analysis revealed a conduction band potential of -0.58 V for pristine GCN and -0.68 V for the optimized 5.5NiO/GCN composite. Band gap energies obtained from the Tauc plot were 2.91 eV for GCN and 2.80 eV for 5.5NiO/GCN, confirming that NiO incorporation narrowed the band gap and enhanced photocatalytic properties. Furthermore, the influence of co-existing pollutants was also investigated. Inorganic salts (NaCl and Na₂SO₄) reduced degradation efficiencies to 93% for CR and 84% for BPA, whereas organic co-contaminants (PVA and acetone) decreased them to 80% and 77%, respectively, under identical conditions. Total organic carbon (TOC) analysis demonstrated 91% mineralization for CR and 87% for BPA over 1 h, indicating that the photocatalyst achieved significant mineralization, not just superficial degradation. Overall, these findings establish 5.5NiO/GCN as a highly efficient photocatalyst for both dye and organic pollutant removal and emphasize the critical role of co-contaminants in real wastewater scenarios. Download: Download high-res image (257KB) Download: Download full-size image
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2026
·Vol. 40
·期 5
·e70581
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IF 4.3
Wenjing Song,Zhenhao Xiao,Shuo Yan,Jie Li,Weizuo Li,Haiqun Chen
The chemical fixation of carbon dioxide (CO 2 ) into value-added cyclic carbonates is a promising pathway for carbon utilization; however, developing heterogeneous catalysts with high activity and stability remains a challenge. In this study, a Cu–Mg-MOF-74 precursor was synthesized via a solvothermal method and subsequently transformed into a Cu–Cu 2 O–MgO/C nanocomposite catalyst through a one-step pyrolysis process under N 2 atmosphere at 550°C. The pyrolysis process leads to the collapse of the MOF crystal structure and the formation of highly dispersed Cu–Cu 2 O–MgO nanoparticles embedded in a carbon matrix, while the overall morphology inherited from the MOF precursor remains largely preserved. Detailed characterization (XRD, XPS, TEM, BET, and in situ DRIFTS) reveals that the catalyst possesses a high specific surface area (296.7 m 2 ·g −1 ), abundant Lewis acid sites (Cu, Cu 2 O, and MgO), and surface oxygen-containing groups, which synergistically enhance catalytic performance. Under relatively moderate conditions (90°C, 0.7 MPa, CO 2 , 7 h), the Cu–Cu 2 O–MgO/C catalyst achieved a styrene oxide conversion of 94% with 99% selectivity, significantly outperforming its monometallic and physical mixture counterparts. Furthermore, the catalyst demonstrated excellent substrate versatility and robust recyclability over five consecutive runs without structural collapse. This work provides a facile strategy for fabricating robust MOF-derived carbon-based catalysts for sustainable CO 2 conversion.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Anfeng Zhu,Guodong Tang,Sanjun Zhi
An rGO-cellulose carbon aerogel with coupled Ni/NiO fibers and particles enables multiscale electromagnetic regulation. • A secondary redox calcination strategy constructs high aspect ratio Ni/NiO nanofibers with abundant heterointerfaces. • Interfacial polarization, defect dipoles and magnetic loss synergistically achieve impedance matching and attenuation. • Thickness-dependent absorption enables near full band microwave attenuation and effective RCS reduction. Electromagnetic wave–absorbing materials are critical for electromagnetic interference (EMI) suppression in electronic devices and stealth applications in military equipment. Herein, a structurally coupled three-dimensional C/Ni/NiO composite is fabricated by combining a graphene-reinforced cellulose-derived carbon aerogel with in situ generated fibrous Ni/NiO heterostructures. Freeze-casting and carbonization create an interleaved conductive lamellar framework, while secondary calcination induces anisotropic growth of high-aspect-ratio Ni/NiO fibers through redox-driven stress regulation. The resulting hierarchical heterointerfaces significantly enhance interfacial polarization, anisotropic magnetic loss, and multiple scattering, fostering effective synergy between dielectric and magnetic dissipation. With optimized composition, the composite exhibits a minimum reflection loss of −50.7 dB. Furthermore, thickness tunability facilitates near-full-band absorption, and significant radar cross-section (RCS) reduction is demonstrated across a wide range of incident angles. demonstrating the potential of structurally coupled 3D heterostructures for high-performance electromagnetic wave absorption. Download: Download high-res image (240KB) Download: Download full-size image The interconnected 3D carbon–magnetic architecture enables efficient microwave penetration and multiple internal reflections, while abundant C–Ni/NiO heterogeneous interfaces induce strong interfacial polarization, synergistically coupled with defect-dipolar dielectric loss and eddy current–dominated magnetic dissipation to achieve optimized impedance matching and rapid energy attenuation. Consequently, the optimized CNO-2 exhibits an ultralow RLmin_\text{min}min of −50.7 dB at a thickness of 2.52 mm with a broad effective absorption bandwidth of 3.84 GHz. In addition, pronounced radar cross-section reduction is sustained over wide incident angles, with the main-lobe RCS suppressed from 5.37 to −27.86 dB·m², highlighting the efficacy of this lightweight, low-loading structural–interfacial coupling strategy for high-performance microwave absorbers.
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Green Carbon
·
2026
·
IF 14.2
Shihao Li,Xiaoyang Yue,Fei Huang,Qian Zhang,Xiao Huang,Jingjing Zhao,Luwei Bao,Yanjun Jiang
Unspecific peroxygenases (UPOs) enable the selective hydroxylation of inert C–H bonds using H 2 O 2 under mild conditions. However, their practical application is fundamentally limited by oxidative deactivation at elevated H 2 O 2 concentrations. Herein, a highly synergistic photobiocatalytic system is constructed by covalently immobilizing UPOs onto a Rh-complex-coordinated covalent organic framework (COF) to facilitate the in-situ generation of H 2 O 2 and sequential enzymatic utilization. Specifically, a COF featuring a pyridinic imine structure (COF PyIm ) is designed to precisely anchor Rh(III) complexes. Compared with its bipyridine-structured analog (COF Bpy ), COF PyIm provides more coordination sites and a shorter electron-transfer distance. Consequently, the photocatalytic H 2 O 2 synthesis rate reached 22.17 mM·g -1 ·h -1 , representing a performance improvement of approximately 40%. This enhancement is attributed to the optimized pyridine–imine coordination microenvironment, which promotes charge separation and electron transfer. Subsequently, UPO from Agrocybe aegerita ( Aae UPO) is covalently immobilized onto COF PyIm to yield Aae UPO@Rh-COF PyIm , which achieves efficient spatiotemporal coupling between in situ H 2 O 2 generation and enzymatic hydroxylation of the C–H bond. This integrated photobiocatalyst can achieve 90% yield, >99% enantiomeric excess ( ee ), and a turnover number of 41,666 in the asymmetric hydroxylation of ethylbenzene. It also exhibits excellent reusability (retaining 70.4% of its initial activity after six cycles) and broad substrate scope.
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Mengwen Zhang,Fanyu Meng,Xiaoyu Chen,Na Cao,Lei Fan,Shoulei Yang
High-performance ceramic cutting tools require superior hardness and toughness under extreme temperatures; yet conventional sintering methods for Al 2 O 3 -Ti(C,N) composites often suffer from incomplete densification and grain coarsening. In this study, dynamic sinter forging (DSF) with oscillatory pressure amplitudes of 40 ± 40 MPa at 1600 °C is employed to regulate the densification behaviour and microstructural evolution of Al 2 O 3 -Ti(C,N) composites. The composite achieves a relative density above 99.9%, flexural strength of 1111 MPa, and hardness of 24.5 GPa at 15 Hz. A maximum fracture toughness of 5.44 MPa m 1/2 is obtained at 10 Hz. Microstructural observations reveal that moderate-frequency oscillation activate interfacial diffusion and stress-assisted plastic flow, promoting grain-boundary sliding and compact bonding to form a fine-grained and homogeneous structure. These results confirm that frequency-controlled DSF facilitates simultaneous enhancement of strength and toughness, providing a valid route for fabricating high-performance Al 2 O 3 -based cutting ceramics with optimized microstructural designs.
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高影响因子
POLYMER COMPOSITES
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2026
·
IF 4.9
Qi Wang,Weibo Zhou,Xin Wang,Wenbo Sun,Yuhui Ao,Ming Li
The increasing electromagnetic radiation from electronic devices has created an urgent demand for structural composites that simultaneously exhibit high mechanical performance and effective electromagnetic interference (EMI) shielding capability. Herein, a multiscale interfacial modification strategy for carbon fiber (CF) composites is proposed to achieve synergistic enhancement of load transfer efficiency and EMI shielding performance. Zn-based metal–organic framework (Zn-MOF) is first in situ grown on the CF surface via a polydopamine (PDA) interlayer, followed by a two-step calcination process to generate a tightly bonded ZnO/C hybrid coating. Subsequently, a conductive PEDOT:PSS (PP) layer is deposited to construct a hierarchical conductive network. Owing to the optimized multiscale interfacial architecture, the resulting CF-PDA-ZnO-PP composites exhibit significant improvements in mechanical properties, with the interlaminar shear strength, flexural strength, and flexural modulus increased by 44%, 41%, and 87%, respectively, compared with untreated CF composites. Meanwhile, the composite achieves a total shielding effectiveness (SE T ) of 44 dB, indicating excellent EMI shielding capability. This work provides a feasible and scalable approach for the design of next-generation structural composites with high load-bearing capacity and EMI shielding functionality, showing strong potential for applications in aerospace, transportation, and high-end electronic equipment. Highlights PDA assisted uniform growth of Zn-MOF-derived ZnO@C on CF. Simultaneously enhancing interfacial strength and EMI properties. Optimal flexural modulus increased by 87% than pristine CFRP. Optimal EMI SE increased by 101% than pristine CFRP.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·
IF 4.4
Zhao Jianghui,Cui Huaqiang,Yang Qinqin,Ye Wuyi,Huang Aofeng,Wu Bo,Liu Zhi
Doping has been widely explored as an effective strategy to enhance the photocatalytic performance of TiO 2 under visible light for degrading organic pollutants. However, conventional dopants derived from chemical reagents raise environmental and human safety concerns. In this study, natural down fiber (DF) was innovatively employed as a sustainable and green source of C and N, combined with copper acetate as the copper source, to fabricate C–N–Cu co-doped TiO 2 (C–N–Cu@TiO 2 ) via a facile one-step hydrothermal method. Comprehensive characterization revealed that, compared to pure TiO 2 , the co-doped C–N–Cu@TiO 2 exhibited a narrowed band gap (from 3.11 to 2.83 eV), reduced photoluminescence intensity, and enhanced photocurrent density, indicating improved visible-light absorption and effective suppression of electron–hole recombination. Under simulated one-sun irradiation, C–N–Cu@TiO 2 demonstrated outstanding photocatalytic activity, achieving a high degradation efficiency of 98.20% for methyl orange within 2 h, which is competitive with many reported doped TiO 2 photocatalysts. Trapping experiments identified O 2 − and h + as the primary active species, and a plausible photocatalytic mechanism was proposed accordingly. This work not only confirms the effectiveness of natural DF as an eco-friendly and sustainable doping source, but also encourages further exploration of biomass-derived functional materials for applications in wastewater treatment, photocatalytic hydrogen evolution, carbon dioxide reduction, and related fields.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xiaqing Meng,Wenbo Nie,Tao Shu,Zhensheng Tao,Huifang Zhao,Junying Wang,Hui Zhang,Junzhong Wang
A facile vapor-phase strategy for exfoliate graphite into high-performance bifunctional graphene heterojunctions. • Strong electromagnetic wave absorption with a minimum RL of −75.3 dB and a broad EAB of 6.08 GHz. • High in-plane thermal conductivity combined with low electrical conductivity. • Surfactant-like dispersibility in solvents, enabling the fabrication of versatile coatings and composites for practical applications. The growing integration and power density of electronics require materials that combine efficient electromagnetic wave absorption with thermal management. However, synthesizing lightweight, processable 2D materials that exhibit strong electromagnetic attenuation alongside high thermal conductivity yet electrical insulation remains a challenge. Here, we present a vapor intercalation-deposition approach of merging graphite exfoliation and metal‑nitrogen‑carbon atomic-layer growth to synthesize a graphene bonded dual-atom FeNi-N-C heterojunction. FeCl 3 in the graphite interlayer can coordinate with 2-methylimidazole and catalyze the formation of C C bonds between graphene and the FeNi-N-C layer during heating. The solution-processable heterojunction exhibits outstanding electromagnetic attenuation of a low reflection loss of −75.3 dB, a broad absorption bandwidth of 6.08 GHz at 1.75 mm, a radar cross-section reduction of 51.4 dB·m 2 . It also shows low electrical conductivity (0.775 S/cm) and high thermal conductivities (10.57 W·m −1 ·K −1 in-plane, 4.03 W·m −1 ·K −1 out-plane). Mechanistic studies demonstrate that interfacial coupling between graphene and Fe(Ni)-N 4 -C atomic layers synergistically boosts dipole polarization and dielectric loss for enhanced electromagnetic attenuation, and atomic-layer design enables the decoupling of electrical and thermal transport. This work offers a low-cost, scalable route to adaptable two-dimensional heterojunctions for integrated electromagnetic wave absorption and heat dissipation in next-generation electronics. Download: Download high-res image (489KB) Download: Download full-size image
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高影响因子
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