ChemCatChem
·
2025
·
IF 3.9
Yu Tang,Kaiyang Xu,Lingfeng Weng,Yuanjie Xu,Li Tan,Lizhi Wu
Cyclopentanone (CPO) is a high-value platform chemical widely used in fuel, fragrances, and polymers, yet its sustainable production from biomass remains challenging. This work addresses this gap by developing efficient Ni/TiO 2 catalysts through crystal phase engineering of TiO 2 supports (anatase, rutile, mixed-phase P25) for aqueous-phase hydrogenative ring-rearrangement of furfural (FAL) to CPO. Crucially, the TiO 2 phase dictates the Ni–O–Ti interface structure, governing nickel speciation and reactivity. Ni supported on mixed-phase P25 achieves exceptional performance under industrially relevant conditions: 91.1% FAL conversion, 89.3% CPO selectivity, and specific rate of 71.6 h −1 , surpassing catalysts on pure anatase (9.1% conversion) or rutile (55.8% conversion). Physical mixture experiments confirm this superiority stems from the intrinsic interface of P25, not component blending. Characterization reveals that P25 stabilizes a multifunctional surface ensemble: metallic Ni⁰ (18.0% by XPS) enables hydrogenation, while cationic Ni 2+ facilitates acid-catalyzed dehydration and ring rearrangement. Simultaneously, sufficient metal–support interaction permits in situ regeneration of active sites. The optimized 1Ni/P25 demonstrates robust stability over five cycles with retained selectivity (>90%), showcasing practical durability. This study provides a scalable design strategy—support crystal phase tuning—to engineer cost-effective, multifunctional catalysts for industrial biomass upgrading, advancing green manufacturing of cyclic ketones without precious metals. Graphical This study investigates how the TiO 2 crystal phases (anatase, rutile, and P25) affect Ni-based catalysts in the conversion of furfural (FAL) to cyclopentanone (CPO). Ni/TiO 2 -P25 shows superior performance: 91.1% FAL conversion and 89.3% CPO selectivity, outperforming that on anatase and rutile. It stabilizes mixed-valence Ni (Ni° for hydrogenation, Ni 2+ for acid-catalyzed steps) via unique Ni–O–Ti interfaces, enabling efficient FAL conversion.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Sijin Zuo,Shengcai Zhu,Jiaying Wang,Weiping Liu,Juan Wang
A N/O-codoped carbon-based catalyst (N/O-C-8) designed with dual reaction sites (pyridinic N and carbonyl group) was fabricated in this work, for persulfate based advanced oxidation reaction. The pyridinic N served as the adsorption site for target molecule, via series of high resolution XPS analysis and DFT calculation. Meanwhile, the carbonyl group functioned as the persulfate activation site, to generate oxidative 1 O 2 . Engineering and isolating the two reaction sites on catalyst surface can greatly shorten the migration distance from 1 O 2 to target organic molecule, resulting in good catalytic removal efficiency. As demonstrated, during a 4-hour continuous flow experiment, our catalyst showed stable and efficient removal of tetracycline, with a flow rate of 4 mL/min. The study provides keen insights into the design of effective non-metal based catalysts for practical water remediation.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Shenghua Ye,Yaqi Lei,Tingting Xu,Lirong Zheng,Zhida Chen,Xiuyuan Yang,Xiangzhong Ren,Yongliang Li,Qianling Zhang,Jianhong Liu
In this study, phosphate FeCo(H 3 O)(PO 4 ) 2 nanosheet arrays (NAs) were synthesized using an electrochemical strategy. FeCo(H 3 O)(PO 4 ) 2 NAs as precatalyst could undergo significant self-reconstruction, including leaching of phosphate anions and electro-oxidation of Co 2+ during anodizing at the potential range of oxygen evolution reaction (OER) in 1 M KOH solution, eventually resulting in the formation of Fe 0.5 Co 0.5 OOH NAs with low crystallinity . The high content of Fe in Fe 0.5 Co 0.5 OOH NAs promoted the formation of active Fe 3+ –O–Fe 3+ motifs that increased OER occurrence. Additionally, Fe incorporation increased the ratio of the reaction rate constants of oxygen evolution to Co 3+ /Co 4+ (k OER /k M,ox ) and enhanced the reaction order on the hydroxyl ion . These factors significantly contributed to the outstanding OER catalytic performances of Fe 0.5 Co 0.5 OOH NAs.
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Advanced Energy Materials
·
2025
·Vol. 15
·期 34
·2502226
·
IF 26
Mengting Guo,Changping Wang,Yize Niu,Mingyue Ruan,Dong Yang,Fei Wang,Haonan Wang,Nankai Wang,Ying Jiang,Tianyi Li,Yan He,Qiang Li
The high-voltage spinel LiNi 0.5 Mn 1.5 O 4 (LNMO) is a promising cathode material for lithium-ion batteries due to its high energy and power densities, excellent thermal stability, low cost, and environmental benignity. However, the presence of Mn 3+ induces Jahn─Teller (J─T) distortion, leading to Mn─O bond elongation, lattice stress, and degradation of both structural and electrochemical stability during cycling. To address this,a bond-length engineering strategy is proposed by co-doping Fe at the Mn 16d sites and Sb at the vacant 16c positions to suppress the J─T effect and stabilize the crystal structure. Electron paramagnetic resonance (EPR), in situ X-ray diffraction (XRD), and density functional theory (DFT) calculations confirm that the Mn─O bond regulation strategy effectively mitigates MnO 6 octahedral distortion, reduces phase transitions, and enhances structural robustness. Moreover, Sb incorporation expands the lattice, facilitating Li + diffusion. As a result, the optimized FeSb-LNMO delivers remarkable electrochemical performance, retaining 98% of its initial capacity after 200 cycles at 1C, and achieving 85.6% capacity retention over 1000 cycles at 5C. This work introduces a novel bond-length engineering approach via multi-site doping to overcome degradation in high-voltage LNMO, enabling ultra-fast charging and long-term cycling stability.
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ACS Applied Electronic Materials
·
2025
·
IF 4.7
Shikun Zhang,Jun Qian,Yu Qi Jun,Jia-Qi Bai,Jingshuai Chen,Mingyuan Wu,Song Sun,Chang-Jie Mao
Polymer-based thermally conductive films face significant challenges related to interfacial thermal resistance, especially when required to deliver both efficient heat dissipation and electromagnetic interference (EMI) shielding in advanced electronic applications. In this study, we present a multifunctional composite system by incorporating copper-decorated hydroxylated graphene (Cu-GOH) and MXene (Ti3C2TX) into a poly(vinylidene fluoride) (PVDF) matrix. The hybrid filler network is engineered through dual interfacial interactions: Cu···π bonding with the graphene framework and Cu–O coordination with the MXene surface, establishing continuous thermal and electrical transport pathways. At an optimized filler loading (22.5 wt % Cu-GOH and 2.5 wt % MXene), the composite achieves: (i) a through-plane thermal conductivity of 3.64 W·m–1·K–1, representing a 19.22-fold enhancement over pristine PVDF; (ii) an in-plane electrical conductivity of 6.44 × 10–4 S·cm–1; and (iii) robust X-band EMI shielding effectiveness (≥25 dB across 8–12 GHz), exceeding military-grade requirements. Additionally, the hierarchically organized filler architecture enhances mechanical integrity, addressing the common trade-offs between functionality and durability in polymer composites. These findings demonstrate the potential of Cu-GOH/MXene/PVDF composites for integration into high-performance thermal management and EMI shielding components in aerospace systems, satellite communications, and next-generation renewable energy technologies.
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ACS Sensors
·
2026
·Vol. 11
·期 8
·7629-7639
·
IF 10.9
He Jianwang,Zhang Rongkai,Wei Yuyu,Ji Mingwei,Meng Hu,Xu Yan
Nitrous oxide (N 2 O) is a potent greenhouse gas, but its chemical inertness hinders sensitive chemiresistive sensing. We demonstrate here that Au-decorated ZnO (Au-ZnO) dramatically enhances N 2 O detection. At an operating temperature of 260 ° C, the Au-ZnO sensor responds to 25 ppm N 2 O with a value of 7.6, which is a 3.8-fold enhancement over the ZnO sensor. It also exhibits high selectivity against common greenhouse gases, a lower theoretical limit of detection (0.24 ppm), a fast response time (10 s), and reliable stability. The previously elusive mechanism has been uncovered by integrating experimental characterizations and density functional theory calculations. A strong metal–support interaction, abundant oxygen vacancies at the Au-ZnO interface, and an electron-rich surface collectively switch N 2 O adsorption geometry from the O-end (physisorption on ZnO) to the N-end (weak chemisorption on Au-ZnO). This switch induces significant intramolecular charge rearrangement of N 2 O, which is crucial for enhancing the selective N 2 O sensing reaction. The abundance of reactive sites, the spillover effect, and the catalytic action of Au nanoparticles, as well as the narrowed band gap, promote N 2 O adsorption, surface reactions, and rapid charge transfer collectively. This work goes beyond the traditional oxygen-ionosorption model by showing that switching adsorption geometry and intramolecular polarization are crucial for activating inert molecules. This provides a detailed explanation of how to create high-performance N 2 O sensors.
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 7
·462
·
IF 5.4
Zhao Yunfei,Fang Jiale,Zhang Baofeng,Wang Yan,Wu Lianbin,Pan Qinghua,Zhou Ziyun,Jiang Kezhi
A superhydrophobic magnetic nanomaterial, Fe 3 O 4 @C16&TMS, was synthesized by hexadecylating the surface of the Fe₃O₄ nanoparticles and sealing the residual hydroxyl groups. The nanomaterial exhibits a high specific surface area of 45.3 m²/g, and superhydrophobicity with a water contact angle of 158.11°. The high specific surface area offers numerous adsorption sites, and the superhydrophobic characteristics of the synthesized nanomaterial can selectively enrich non-polar volatile methylsiloxanes (VMSs) through hydrophobic interactions, thereby significantly enhancing extraction efficiency and reducing matrix interference. Notably, no significant decline in performance was observed after 6 consecutive reuse cycles. Based on this material, a rapid and simple method for the determination of VMSs in water was developed using magnetic solid-phase extraction (MSPE) coupled with gas chromatography-mass spectrometry (GC-MS) analysis. The method enabled effective extraction of VMSs from water within 20 min, achieving recoveries ranging from 70.4% to 117.0%. The method limit of quantitation (LOQ) was 0.004 ng/mL, with intra-day precision (RSD) ranging from 0.9% to 3.9%. Analysis of real water samples revealed contamination in all 16 selected water bodies, with five specific VMSs species detected at concentrations ranging from 0.01 to 0.52 ng/mL. In summary, the proposed method enabled rapid and simple determination of VMSs in water samples, demonstrating significant potential for environmental analysis applications. Graphical abstract The alternative text for this image may have been generated using AI.
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PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2026
·Vol. 28
·期 5
·135
·
IF 3.5
Guo Hao,Zhang Baowen,Bai Ziwei,Miao Rusen,Zhang Kaiyue,Wang Meng,Tian Fei
A rapid, sensitive, and convenient surface-enhanced Raman spectroscopy (SERS) substrate was developed using Fe₃O₄/C as the magnetic core and SiO₂-SH as the shell for the detection of aflatoxin B1 (AFB1). Ultra-small Fe₃O₄/C nanoparticles (NPs) with an average size of 6.30 ± 0.68 nm and excellent magnetic responsiveness were synthesized via a one-pot hydrothermal method, followed by the deposition of a uniform SiO₂ shell, followed by thiol-group functionalization to yield Fe₃O₄/C/SiO₂-SH. The magnetic core enables instantaneous separation of the substrate from solution after AFB1 adsorption, eliminating the need for centrifugation or filtration. When employed as a SERS substrate, significant enhancement of the characteristic Raman peak at 1482 cm⁻ 1 was observed across AFB1 concentrations of 0.1–10 μg/mL. Notably, the peak intensity at 10 μg/mL exceeded that of solid AFB1 powder. Comprehensive characterization (TEM, XRD, FTIR, XPS, and vibrating sample magnetometry) confirmed the core–shell structure, high crystallinity, and strong magnetic properties. The prepared Fe₃O₄/C/SiO₂-SH nanocomposite offers a low-cost, easily recyclable, and noble-metal-free platform, demonstrating strong potential for trace AFB1 monitoring in herbal medicines and food products.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Heng Dai,Qi Yu,Zhanyu Cao,Jiaxin Wang,Wenbo Sun,Jiayu Wang
Developing lightweight microwave-absorbing materials with a low filler loading, strong attenuation capability, and broad effective absorption bandwidth is an important requirement in electromagnetic protection and radar stealth. In this work, a nitrogen-doped reduced graphene oxide/Ce-doped strontium ferrite@nitrogen-doped carbon (NRGO/Ce-SrM@NC) heterointerfacial absorbing structure was constructed by hydrothermal assembly and dopamine-derived carbonization. In this system, Ce-SrM provides the magnetic response, NRGO builds a lightweight conductive network, and the NC shell acts as an interfacial bridging layer to regulate the coupling between magnetic particles and graphene sheets. Structural characterization shows abundant defect sites and close particle-sheet contact interfaces. At a filler loading of only 5 wt%, the NRGO/Ce-SrM@NC composite achieves a minimum reflection loss (RL min ) of −53.2 dB at a matching thickness of 2.6 mm and a maximum effective absorption bandwidth (EAB) of 7.22 GHz. Its excellent electromagnetic wave absorption (EWA) performance mainly originates from the synergistic effect of balanced impedance matching, conductive loss, dipole polarization, interfacial polarization, magnetic resonance, and multiple scattering. Further CST simulations show that a PEC plate coated with the NRGO/Ce-SrM@NC composite can achieve a radar cross section reduction of 41.35 dB cm⁻¹ . Meanwhile, the simulated moth-eye-inspired gradient structure based on the NRGO/Ce-SrM@NC composite extends the EAB to cover the entire 2–18 GHz range. This study provides a feasible strategy for the design of low-filler, broadband electromagnetic wave-absorbing materials and radar stealth structures.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Shijian Zhang,Xiuxiu Huang,Wenbin Ruan,Xiaotong Mu,Kai Chen,Ge Ge,Hao Zhang,Jie Li,Yaner Ruan,Xiufang Wang
A self-supporting hierarchical NiFe-LDH@Cu/Cu 2 O heterostructure has been designed. • The tightly coupled NiFe-LDH@Cu/Cu 2 O heterointerface achieves efficient proton-electron synergistic transfer. • The catalyst delivers NO 3 − reduction performance with high Faradaic efficiency and excellent selectivity toward NH 3 . Electrochemical nitrate reduction reaction (NO 3 RR) provides a sustainable approach for ammonia synthesis and environmental remediation; however, the multi-step proton-coupled electron transfer processe poses significant challenges for achieving high efficiency and selectivity. Herein, we engineered a self-supporting NiFe-LDH@Cu/Cu 2 O (LDH: layered double hydroxides) heterostructure via facile hydrothermal and electrochemical deposition methods. The optimized electrode delivers exceptional NH 3 synthesis performance (1.06 ± 0.058 mmol h −1 cm −2 and a Faraday efficiency of 97.6 ± 1.88% at −0.4 V vs. RHE) and an excellent long-term stability. The experimental and theoretical calculation results reveal that NiFe-LDH accelerates water dissociation to yield abundant active hydrogen (*H) species, relieving the *H shortage during the reaction. The Schottky interface of Cu/Cu 2 O further optimizes interfacial electronic configuration, facilitates electron transport, and strengthens the adsorption of NO 3 − and reaction intermediates. The tightly coupled NiFe-LDH@Cu/Cu 2 O heterointerface realizes a highly efficient proton-electron synergistic relay. This distinctive effect drives the coordinated transport of electrons and protons, maximizes the utilization of active hydrogen, and expedites the deep hydrogenation of NO 2 − intermediates. This work provides a rational design strategy for enhancing NO 3 RR performance toward waste nitrate treatment and green ammonia synthesis via proton-electron coupled transfer engineering. Download: Download high-res image (250KB) Download: Download full-size image
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Inorganic Chemistry Frontiers
·
2026
·
IF 6.2
Lei Huang,Xue Zou,Ensi Li,Dongmei Wang,Imran Shakir,Xuping Sun,Zhengjun Gong
Advanced oxidation process of inorganic peroxide activation is regarded as an effective and reliable method for antibiotics removal. In this paper, we report on the development of Fe-O-coordinated porous honeycomb carbon nanofiber (Fe-O-HCNF) as a high-performance catalyst for rapid degradation of tetracycline (TC) by activation of peroxymonosulfate (PMS). The effects of Fe-O-HCNF dose, PMS concentration, and initial pH were systematically investigated. The results showed that such Fe-O-HCNF achieved a high TC degradation efficiency of 84.7% within 15 minutes. Notably, complete TC degradation (100%) was achieved within 8 minutes at an low catalyst dosage of 0.08 g/L. The Fe-O-HCNF possessing exceptionally high specific surface area of 691.501 m²g-1 provides abundant adsorption and activation sites for the degradation reaction, while the introduction of iron is essential for the continuous activation of PMS. The electron paramagnetic resonance and quenching experiments results indicated that, in addition to sulfate (•SO4−) and hydroxyl (•OH), both singlet oxygen (1O2) and superoxide (•O2−) contribute to the degradation of TC. More interestingly, the Fe-O-HCNF /PMS system showed almost no interference in the real water matrices and various initial pH conditions. Importantly, no metal ion leaching was detected in the treated effluent, indicating minimal secondary environmental contamination risks from heavy metal leaching.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Xuechun Li,Ze Zhang,Yang Xu,Rongxin Xia,Yuxiang Mao,Jun Cheng
For improving the activity of low-cost non-noble metal catalysts for the oxygen evolution reaction (OER) in acidic water electrolysis, a strategy was proposed to construct atomic Mn–O–Co asymmetric units within Co3O4 to form a directional built-in electric field. Mn-doped Co3O4 catalysts (MnxCo3–xO4) were synthesized via a hydrothermal-calcination method. The computational results indicated that Mn selectively occupied the octahedral Co site, forming a directional electron transfer pathway from Mn to Co, which effectively modulated the electronic structure of both Co and O. In situ Raman spectroscopy proved that the Mn–O–Co structure accelerated the efficient conversion of oxygen-containing intermediates. DFT calculations indicated that the Mn–O–Co directional built-in electric field facilitated H2O polarization via enhancing hydrogen bonding and, by optimizing the *OOH adsorption structure, lowered the OER rate-determining step barrier by 0.05 eV. The asymmetric Mn–O–Co coordination structure lowered the p-band center of the O atom by ∼0.1 eV atom, which passivated lattice-O to improve lattice stability. XPS revealed that the Mn0.6Co2.4O4 material had the maximum built-in potential. The electrochemical testing indicated that it exhibited an overpotential of only 243 mV at a current density of 10 mA cm–2 and maintained stability for over 80 h.
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