COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Shenfei Li,Huihui Peng,Xiaoqiang An,Huachun Lan,Xuelian Yu
Nonradical oxidation via peroxymonosulfate (PMS) activation has attracted considerable attention for organic pollutant degradation, while the control and regulation of singlet oxygen ( 1 O 2 ) generation in catalytic oxidation are still challenging and the underlying mechanism remains ambiguous. In this paper, we synthesized a nitrogen-doped carbon-supported manganese-based catalyst by using ZIF-8 as a metal-organic framework (MOF) template for the in-situ loading of active components. When used for peroxymonosulfate activation, the MnO-Mn 6 N 2.58 /N-C catalyst exhibits a high Bisphenol A (BPA) degradation rate of 0.133 min -1 , exceeding PMS oxidation alone by 67 times. Mechanistic investigations reveal that the degradation process relies on the direct electron transfer from heterogeneous catalysts to PMS, contributing to efficient 1 O 2 generation for BPA degradation via a nonradical pathway. We demonstrate that Mn(II)/Mn(III) redox cycling on the catalyst surface activates PMS into superoxide (O 2 • - ), which in turn converts into 1 O 2 , thereby elucidating the underlying mechanism for high-efficiency degradation. This work provides a novel strategy to design heterogeneous Mn-based catalysts for recalcitrant organic wastewater remediation via a nonradical oxidation pathway.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Longxiang Guo,Jiazhe Li,Junjun Zhang,Hangcheng Yang,Kui Wang,Hengda Sun,Yu Chen,Hongkang Wang
Core-shelled MnO/C nanospheres were prepared via a facile template strategy. • MnO/C demonstrated superior zinc storage behavior with outstanding cycling/rate performance. • MnO/C showed surface pseudocapacitance-dominated hybrid charge-storage mechanism. Manganous oxide (MnO) is a promising high-capacity cathode for aqueous zinc-ion batteries (AZIBs), but its practical application is severely hindered by low intrinsic electronic conductivity and large volume fluctuations during cycling. Constructing yolk–shell architectures with conductive carbon matrices is an effective strategy, yet conventional templating methods usually involve sacrificial templates and multi-step procedures, limiting scalability and structural uniformity. Herein, we report a facile, template-free strategy to fabricate uniform yolk–shell MnO/C nanospheres. The synthesis involves a single-step solvothermal preparation of a Mn–glucose complex precursor, followed by controlled thermal annealing under argon. The resulting architecture features a well-defined internal void, a porous MnO/C composite shell, and a continuous three-dimensional carbon network. These structural attributes synergistically accommodate volume expansion, facilitate electron transport, and shorten ion diffusion pathways. When evaluated as a cathode for AZIBs, the yolk–shell MnO/C delivers a high reversible capacity of 290.0 mAh g −1 at 0.2 A g −1 and outstanding long-term cycling stability, retaining 191.2 mAh g −1 at 1 A g −1 and 146.5 mAh g −1 at 2 A g −1 each after 1000 cycles. Quantitative kinetic analysis reveals that the superior rate capability originates from a surface pseudocapacitance-dominated hybrid charge-storage mechanism, enabled by the high specific surface area and abundant mesoporous channels of the yolk-shell architecture. This work provides a straightforward and scalable pathway for fabricating advanced yolk–shell structured metal oxide/carbon composites for advanced energy storage.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Ze Xiao,Yanan Li,Meile Chu,Ming Li,Yang Zheng,Yanfei Liu,Chen Zhang,Yongli Chai
Aqueous phase reforming of methanol (APRM) provides a promising strategy for in-situ hydrogen production, yet its practical application is hindered by insufficient catalyst activity and stability. Herein, we report a carbon-coated copper catalyst with uniformly dispersed nanoparticles for efficient APRM. The Cu@C catalyst exhibits significantly enhanced performance in the presence of KOH, achieving an average hydrogen productivity of 236.2 μmol H2 /g cat. /s at 220 °C, nearly triple that under alkali-free conditions. Notably, the hydrogen purity reaches 99.99% with negligible CO x and alkane byproducts. Mechanistic studies reveal that methanol reforming proceeds via the methyl formate pathway, while KOH promotes reaction efficiency mainly by in-situ CO 2 capture to form KHCO 3 and by removing poisonous CO species. The synergy between Cu@C and KOH boosts catalytic activity, ensures high-purity hydrogen production, and offers a viable approach for stable and scalable APRM-based hydrogen generation.
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JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 35
·26069-26087
·
IF 4.4
Wang Jin,Qiao Zongwen,Zheng Chunyue,Chen Zhengyan
Epoxy resin (EP) composites with high thermal conductivity are critically important for effective thermal management in modern electronics. However, their development is often hindered by the intrinsically low thermal conductivity of epoxy. In this study, a vertically aligned, neuron-mimetic three-dimensional graphene nanoribbon–carbon nanotube/carbon (GNR–CNT/C) foam was fabricated through gel compression and carbonization of a GNR–CNT/carboxymethyl chitosan (CMCS) hybrid aerogel. This rationally engineered architecture promotes directional phonon transport while substantially reducing interfacial thermal resistance (ITR). After epoxy infiltration, the resulting GNR–CNT/C/EP composite exhibits a high out-plane thermal conductivity of 6.79 W·m⁻ 1 ·K⁻ 1 at a low filler loading of 2.43 vol%, yielding an exceptional thermal conductivity enhancement (TCE) of 1356%. The composite also demonstrates moderate electrical conductivity, with a volume resistivity of 1.04 × 10 3 Ω·cm, and superior mechanical performance—compressive strength reaches 147.26 MPa, a 76% improvement over neat EP. Combined experimental and theoretical analyses reveal that the multidimensionally continuous and oriented heat transfer pathways within the GNR–CNT/C foam effectively mitigate interfacial phonon scattering. This work provides a feasible and scalable route for designing high-performance thermal interface materials with integrated multifunctional attributes for advanced thermal management.
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ENERGY & FUELS
·
2026
·Vol. 40
·期 30
·16496-16503
·
IF 6
Zhou Wei,Wu Zhiqian,Li Yanjun,Xu Bing,Wang Xiaoqi,Yang Feifei,Ni Zhonghai
The precise function of metal sites at the bifunctional
metal–oxide
interface in catalytic hydrodeoxygenation (HDO) of biomass-derived
oxygenates remains a subject of debate: do they serve merely as hydrogen
dissociation centers, or do they also directly participate in activating
the oxygenate substrate? To elucidate this, we fabricated two model
Ni/TiO 2 catalysts with distinct surface Ni geometries by
leveraging the crystal phase-dependent strong metal-support interaction.
Ni/r-TiO 2 features exposed surface Ni ensembles, while
Ni/a-TiO 2 presents predominantly isolated Ni sites due
to partial encapsulation by a TiO x overlayer.
Their HDO performance was evaluated using a suite of model compounds,
including m -cresol, anisole, benzyl alcohol, and
furfuryl alcohol, representing key C–O bond types in bio-oils.
The results demonstrate that Ni/r-TiO 2 exhibits broad activity
for all substrates, whereas Ni/a-TiO 2 selectively cleaves
only C–O bonds connected to sp 3 -hybridized carbon
atoms. This fundamental difference originates from the bond dissociation
energy. The cleavage of high-energy C Aromatic –O
bonds necessitates a synergistic activation mode at the Ni ensemble-oxygen
vacancy interface, which, while effective, concomitantly promotes
undesirable ring-related side reactions such as C–C hydrogenolysis,
thereby compromising deoxygenation selectivity. Conversely, lower-energy
C sp 3 –O bonds can be directly activated
on oxygen vacancies assisted by spillover hydrogen from the isolated
Ni sites, enabling precise and selective deoxygenation. This study
clarifies the structure-dependent role of interfacial metal geometry
and provides a mechanistic guideline for the rational design of selective
HDO catalysts tailored to specific feedstock platforms.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.8
Jian Xiao,Jiang Liu,Yuxin Guo,Jiali Lin,Qian Li,Dong Zeng,Ruizhi Wen,Hongchang Li
Given the vital nutritional and metabolic role of ascorbic acid (AA) and the need for rapid detection, a photoresponsive nanozyme-based composite was developed for sensitive, accurate, and convenient AA analysis. In this report, a ternary ZIF-8/g-C 3 N 4 /SiO 2 photoresponsive oxidase-mimicking system was developed and applied to AA detection. By regulating the loading ratio of ZIF-8 on the g-C 3 N 4 /SiO 2 substrate, the composite with excellent photoresponsive oxidase-like activity was successfully prepared. Owing to its enhanced visible-light absorption and efficient charge separation and transfer, the system exhibited significantly improved photoresponsive performance. Experimental results demonstrated that ZIF-8/g-C 3 N 4 /SiO 2 could catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB), generating oxidized TMB (oxTMB) through the formation of reactive species, thereby producing a distinct color change. In an acidic environment, AA inhibited the oxidase-like activity of the catalyst due to its strong reducing capability, thus suppressing the colorimetric reaction. Based on this principle, the as-synthesized ZIF-8/g-C 3 N 4 /SiO 2 photoresponsive oxidase mimic was applied to the detection of AA in three beverages. The method revealed a good linear response within the concentration range of 1–40 μM, and the detection limit (LOD) was 0.14 μM. The recoveries of the spiked samples ranged from 95.00% to 103.85%, suggesting that the present method could be successfully applied to sense AA in practical samples. Furthermore, we integrated ZIF-8/g-C 3 N 4 /SiO 2 with the RGB strategy into a novel sensing platform for the visual/onsite semi-quantitative detection of AA in real samples, demonstrating the great potential prospects for the development of rapid food assay.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Cuiyan Li,Shuai Zhang,Haibo Ouyang,Li Wang,Xinnuo Wang,Xinge Niu,Xilin Wang,Xiaoyue Sun,Yumiao Xing,Jiaqi Liu,Mengyao He
Aiming at the urgent demand for multifunctional materials integrating thermal protection, stealth performance and load-bearing capacity in the field of next-generation hypersonic aircraft, this study develops a facile, template-free self-expansion foaming route to fabricate carbon fiber-reinforced porous (Hf, Zr, Ti)C medium-entropy ceramics, denoted as C f /(Hf, Zr, Ti)C (HZT). The influence of carbon fiber content (0–10 wt%) on the microstructure, thermophysical properties, mechanical performance, and electromagnetic wave absorption characteristics is systematically investigated. The synergistic mechanism among lattice distortion-induced polarization enhancement, porous structure-mediated multiple scattering, and carbon fiber-constructed conductive networks is elucidated, which effectively breaks the inherent trade-off between thermal insulation, mechanical strength, and microwave absorption in conventional porous ultra-high temperature ceramics. The sample with 6 wt% carbon fiber (HZT-06) possesses a porosity of 70.2% and a low density of 0.67 g/cm 3 . It exhibits a room-temperature thermal conductivity of 0.253 W m −1 K −1 , exceptional broadband microwave absorption with a minimum reflection loss (RLmin) of −59.69 dB and an effective absorption bandwidth (EAB, RL ≤ −10 dB) of 6.32 GHz at a matching thickness of 2.3 mm, and a high compressive strength of 49.62 MPa. This work realizes the multifunctional integration of low thermal conductivity, high load-bearing capacity and strong broadband microwave absorption at room temperature, and provides promising design strategies and fundamental data support for the development of advanced multifunctional thermal protection materials for hypersonic vehicles.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124745
·
IF 7.5
Siyu Zhang,Yangxiang Xiong,Yixuan Zhao,Xu Cao,Tianqi Wang,Ping Zhang
Bisphenol A (BPA) pollution severely threatens aquatic ecology and human health, and peroxymonosulfate (PMS)-based advanced oxidation processes are efficient for refractory organic pollutant remediation. Our previous study realized the in-situ synthesis of nitrogen-doped swine manure biochar (NBC) for enhanced PMS catalysis, yet abundant endogenous silicon in swine manure remains inert as SiO 2 and fails to contribute to catalysis, restricting the full resource utilization of livestock waste. Targeting this bottleneck, we herein develop a facile ball-milling coupled with HF etching strategy to activate intrinsic silicon on NBC without exogenous dopants. This approach converts inert SiO 2 into reactive Si–O–C interfacial sites while preserving the original nitrogen-doped carbon framework, yielding a Si modified biochar (Si-NBC). Benefiting from the synergistic effect of Si–O–C bridges and inherent nitrogen active sites, the optimized Si-NBC achieves 98% BPA removal within 20 min and 42% total organic carbon mineralization, with a rate constant 18-fold higher than pristine NBC. It performs robustly across pH 3–9, tolerates common coexisting anions, and maintains removal above 90% for 72 h in a continuous-flow reactor. Mechanistic investigations reveal a synergistic non-radical regime: singlet oxygen, generated at C–C and graphitic N sites, dominates the oxidative process, while an electron-transfer pathway, mediated by graphitic N and Si–O–C bridges, accelerates interfacial charge shuttling. Degradation intermediates exhibit markedly reduced ecotoxicity compared to parent BPA. By leveraging in-situ interfacial engineering of biomass-derived carbons, this work both valorizes the underutilized silicon in livestock waste and establishes a mechanistic rationale for the design of high-performance, eco-friendly PMS catalysts.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Zuyang Huang,Lianyang Huang,Shuohai Fang,Yunchuan Yang,Meidan Lai,Xin Zhong,Changzhong Liao,Zihao Wu,Jun Liu
Advanced oxidation processes (AOPs) based on photocatalysis and peroxymonosulfate (PMS) activation hold great promise for the remediation of organic wastewater. To overcome the limitation of narrow light utilization, sluggish PMS activation, and weak synergy between photocatalysis and PMS activation, the rational integration of transition-metal-mediated PMS activation with heterostructure engineering under light provides an efficient pathway for accelerating internal electric field construction and enhancing pollutant degradation. Herein, a C-LaFeO 3 anchored Co-doped g-C 3 N 4 (C-LFO/Co-CN) catalyst was synthesized via a multi-step in situ calcination strategy. When the mass ratio of C-LFO: Co: CN was optimized to 10:1:100, the C-LFO/Co-CN catalyst exhibited optimal photo-Fenton-like synergistic performance, achieving an initial 30-minute degradation rate 5.8 times higher than that under visible light alone. It was revealed that the Co sites directly interact with PMS to form high-valent cobalt (Co(IV) = O). Furthermore, the reconstruction of the internal electric field establishes a Z -scheme heterojunction. This configuration drives the directional migration of photogenerated electrons under illumination, promoting the direct involvement of photogenerated holes from the C-LFO valence band in the degradation of NOR. The influx of photogenerated electrons in Co-CN facilitates the reduction of Co valence states, while in C-LFO, the Fe sites further participate in the formation of a Co Fe valence state cycling system under the activation of PMS. These synergistic dual-metal redox cycles ultimately promote the highly efficient degradation of NOR in the (C-LFO/Co-CN)-PMS-Vis system. This study provides new mechanistic insights and theoretical guidance for efficient photocatalysis–PMS synergistic catalysts for wastewater treatment.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yi Liu,Yahui Wang,Yongke Wang,Rui Xue,Qihang Ren,Chenglong Ding,Zongsheng Chen,Zhigang Li,Xiangyin Lv,Xuesong Deng,Jiaming Shi
The rapid development of multi-band detection technologies has imposed increasingly stringent requirements on materials capable of simultaneously regulating microwave absorption and infrared thermal signatures. A flexible FeCo@C/Carbon Foam/Polythiophene (FCCP) composite film with a hetero-porous architecture is rationally engineered via in situ polymerization to integrate broadband electromagnetic (EM) attenuation and infrared thermal suppression. The hybrid magneto-electric network incorporating conductive polymers enables effective microwave absorption while reducing infrared emissivity. The FCCP composite achieves effective radar cross-section suppression over the entire X-band, together with low infrared emissivity values of 0.63 in the mid-infrared (3-5 μm) and 0.38 in the far-infrared (8-12 μm) regions. Multiphysics simulations based on COMSOL solid heat transfer models elucidate the coupled heat dissipation and radiation behaviors, providing mechanistic insight into infrared thermal regulation. Moreover, the combination of low emissivity and effective thermal management ensures stable infrared suppression under prolonged operation exceeding 24 h. This work demonstrates a materials-architecture-based strategy for integrating EM attenuation, infrared thermal suppression, and thermal management within a single flexible system, offering guidance for the design of next-generation multifunctional compatible materials.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Wanyu Li,Yu Xiao,Rui Yao,Jinping Li,Guang Liu
Solution-reduced nano-Mg is uniformly dispersed in flower-like Ni/C(D). • Mg 2 Ni/Mg 2 NiH 4 pump and carbon confinement synergistically enhance kinetics. • 100% capacity retention over 90 cycles after activation. A rationally designed Mg-Ni/C(D) composite was synthesized by calcining a hydrothermally prepared Ni-MOF(BDC) precursor (from Ni 2 + and terephthalic acid, H 2 BDC) into flower-like porous Ni/C(D), followed by Mg loading via lithium-naphthalenide reduction. Spherical Ni/C(T) was prepared similarly using trimesic acid (H 3 BTC). Compared with Ni/C(T), Ni/C(D) possesses an effective hierarchical porous structure, enabling a higher effective reversible hydrogen storage capacity (based on the total composite mass) at a comparable dehydrogenation onset temperature. During hydrogen sorption, in situ-formed Mg 2 Ni acts as a reversible Mg 2 NiH 4 /Mg 2 Ni hydrogen pump, lowering the kinetic barrier and providing nucleation sites for the Mg/MgH 2 transformation, while the carbon matrix confines nanoparticles to prevent agglomeration. Notably, after 10 activation cycles, it retains nearly 100% capacity over the next 90 cycles. This synergy between catalytic pumping and nanoconfinement makes Mg-Ni/C(D) promising for solid-state hydrogen storage. Download: Download high-res image (156KB) Download: Download full-size image Through in situ lithium-naphthalenide reduction, nano-Mg is uniformly embedded in the flower-like Ni/C(D) scaffold. The Mg 2 Ni/Mg 2 NiH 4 hydrogen pump, coupled with carbon nanoconfinement, effectively lowers the kinetic barriers via interfacial electron transfer and hydrogen diffusion, yielding a low onset temperature of 223.38 °C and 100% capacity retention over 90 cycles after activation. This work demonstrates a rational strategy for designing high-performance Mg-based hydrogen storage materials.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Shuai Wang,Yuqi Chen,Shuyan Zheng,Yanan Yuan,Kexin Du,Min Cui,Yue Wu,Ping Li,Wei Hu,Jingui Wang,Yingshu Guo,Zexing Wu,Yanli Zhao
The incorporation of sp-hybridized nitrogen arisen from graphdiyne (GDY) into the catalyst structure significantly improves the electrocatalytic efficiency of zinc–air batteries by modulating the electronic properties of the active sites, thereby accelerating reaction kinetics and enhancing conductivity. This work highlights the efficacy of the Co–N-GDY catalyst, where sp-N moieties in GDY serving as anchoring centers for cobalt species, which demonstrates exceptional performance in the oxygen reduction reaction, achieving a half-wave potential of 0.85 V, along with high oxygen evolution reaction performance that surpasses that of commercial Pt/C + IrO2-based batteries. The Co–N-GDY catalyst also exhibits commendable cycling stability with minimal fluctuation in voltage difference, indicating its suitability for practical applications in advanced energy storage systems. These findings underscore the importance of developing cost-effective and durable M–N–C catalysts to enhance the commercial viability and sustainability of zinc–air battery technology.
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