POLYMERS FOR ADVANCED TECHNOLOGIES
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2016
·Vol. 27
·期 11
·1501-1507
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IF 1.823
Zhubo Liu,Bing Zhou,A.V. Rogachev,M.A. Yarmolenko
Polytetrafluoroethylene (PTFE) composite coatings doped copper acetate and polyurethane (PU) were prepared on rubber substrate by low-energy electron beam dispersion technique. The effects of dopant and glow discharge treatment on the surface morphology, structure and tribological properties of the coatings were investigated. The results showed that Cu–PTFE composite coatings form uniform surface and dense column structure with spherical aggregations under glow discharge treatment. PU coating shows the large size of protuberance structure but PU–PTFE coating presents spherical structure. Both of the coatings become relative dense and smooth after discharge treatment, and Cu–PU–PTFE composite coatings possess a smoother surface and lower polar component of surface energy. Cu doping weakens the crystallinity and ordering degree of composite coatings, but glow discharge increases the ordering degree and branched structure of C―H groups. Friction experiment indicated that Cu fails to improve the wear resistance of PTFE coatings but glow discharge treatment can do it. Cu–PU–PTFE coatings after discharge treatment have the higher wear resistance and lower coefficient of friction. Copyright © 2016 John Wiley & Sons, Ltd.
研究领域:
材料科学
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表面工程
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高分子材料
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摩擦学
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等离子体物理
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涂层技术
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
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IF 21.1
Donglei Fu,Wei Zhang,Zhengxiong Zhao,Zhonglin Chen,Pengwei Yan,Jinxiang Zuo,Lianpeng Sun
Element-doped catalysts with oxygen vacancies (OVs) are highly effective in water purification by activating oxidants; however, the interfacial mechanisms and specific contributions of reactive oxygen species (ROS) in metal-doped catalysts featuring OVs for peroxymonosulfate (PMS) activation remain insufficiently elucidated. In this study, Cu-doped NiFe 2 O 4 catalysts with abundant OVs were synthesized via a hydrothermal-calcination process, endowing efficient PMS activation for ROS generation. Remarkably, it mediated more sulfate radicals (SO 4 · − ) and hydroxyl radicals (·OH) generation, accounting for 50.4% and 36.5% of 2,4-dichlorophenoxyacetic acid (2,4-D) degradation, respectively. Benefiting from the formation of OVs, it significantly enhanced PMS adsorption ( E ads = -7.17 eV), markedly lower than that of the pristine NiFe 2 O 4 ( E ads = -4.11 eV). Meanwhile, inducing the regulation of the d-band center of Fe and Ni sites towards the Fermi level, thereby enhancing more electron transfer (0.84 e of NiCu x Fe 2-x O 4 compared to 0.60 e of NiFe 2 O 4 ) from OVs to surface-complexed PMS, and thus voluntarily forming SO 4 · − with lower free energy (△G = -11.7 eV). This work elucidates the OVs-mediated structural regulation of the d-band center and interfacial electron transfer pathway, highlighting a synergistic multi-metal activation mechanism in response to PMS activation, which offers a novel strategy for designing efficient catalysts to trigger interfacial ROS formation.
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JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2026
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IF 6.2
Zong-Pin Fu,Yun-Peng Zhao,Yu-Fa Wu,Qi-Jie Zhou,Shu-Ting Hu,Le-Le Qiu,Fang-Jing Liu,Mei Zhong,Jing Liang,Jing-Pei Cao
Mild thermal dissolution is an effective method for the clean, low-carbon conversion of lignite. However, the resulting products still contain numerous oxygen-bridged bonds and heavy molecular compounds, requiring further upgrading to serve as suitable feedstocks for fuels and chemicals. In this study, a supported Cu-Ni bimetallic catalyst was synthesized via a co-precipitation method and applied to the catalytic hydroconversion (CHC) of thermal dissolution portions from Zhaotong lignite (ZT) and lignite-related model compounds (LRMCs). Catalyst characterization revealed that metal particles were uniformly dispersed on the surface of the Cu-Ni/CoOx-CeO 2 catalyst, along with the formation of defect sites. The CoOx-CeO 2 support promoted surface oxygen vacancy formation. Furthermore, the incorporation of Ni altered the local coordination environment of Cu species through multicomponent interactions. The synergy between interfacial oxygen vacancies and Cu-Ni bimetallic sites significantly enhanced catalytic activity. Tests with LRMCs indicated that the Cu-Ni/CoOx-CeO 2 catalyst selectively cleaves C-O ether bonds under mild conditions, exhibiting both high selectivity and strong hydrogenation activity in the CHC of phenolic compounds. The catalyst also effectively promoted the CHC of macromolecular species in the soluble portion from ZT thermal dissolution, thereby converting phenolic compounds into cycloalkanol. These finding provides valuable insights for developing staged conversion routes and achieving value-added utilization of lignite.
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CHINESE JOURNAL OF CATALYSIS
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2026
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IF 17.2
Jiahao Wang,Qiliang Gao,Chao Li,Xiujuan Gao,Jian Gong,Faen Song,Junfeng Zhang,Yizhuo Han,Qingde Zhang
Direct synthesis of acrylic acid (AA) from methanol and acetic acid is promising for the high-value utilization of coal-based chemicals. However, this direct synthesis faces challenges due to limited catalyst functionality or insufficient synergistic effects among multiple active sites. Herein, we constructed a series of bifunctional catalysts (CuO-NSCs) by incorporating Cu into NASICON material for direct synthesis of AA. A total selectivity of 96.0% to AA, methyl acrylate (MA), and methyl acetate was achieved over a 2.5 wt% CuO-NSC catalyst, with the 56.3% selectivity of AA+MA, approximately 23% higher than the one ever reported (33%). Our research revealed that NASICON substrate promoted the formation of more Cu + species, which are crucial redox active sites for methanol dehydrogenation into formaldehyde; furthermore, the appropriate introduction of Cu somewhat regulated surficial acid-base properties, specifically increasing the density of medium-strength acidic and basic sites that are essential for the aldolization of acetic acid and formaldehyde. Apparently, the superior activity of the catalyst was attributed to good synergistic effects between the redox sites and acid-base sites.
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ACS Applied Materials & Interfaces
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2026
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IF 7.8
Ming Zhang,Guoli Fan,Liyuan Yuan,Feng Li
Bioethanol upgrading to higher alcohols (C4–10–OH) involves several sequential reaction steps occurring at multiple different active sites. Therefore, precisely engineering heterogeneous catalysts with appropriate local chemical structures of active sites and spatial environments is highly desired for efficient ethanol tandem conversion. Herein, we constructed a novel Cu-based catalyst featuring atomically dispersed Cu sites confined in a hierarchical silicalite-1@La2O3@silicalite-1 architecture, where single Cu atoms were confined in the micropores of surface silicalite-1 (S-1) zeolite nanoislands dispersed on the outer La2O3 layer encapsulating a hollow S-1 zeolite core. By modulating the content of Cu and La species, such a constructed multihierarchical Cu@S-1@La2O3@S-1 catalyst exhibited excellent performance in ethanol conversion to higher alcohols, along with an impressively high ethanol conversion of 74.9% and C4–10–OH selectivity of 85.0%, as well as an unprecedentedly high production rate of higher alcohols (10.575 mol·gCu–1·h–1) at 275 °C, far exceeding those over state-of-the-art Cu-based catalysts. It was elucidated that surface single-atom Cu sites first notably promoted the adsorption and activation of ethanol and thus initiated its dehydrogenation to produce acetaldehyde, and subsequently, acetaldehyde intermediates migrated to the outer La2O3 layer featuring abundant medium-strength basic and acidic sites, thereby facilitating the condensation of acetaldehydes and their further dehydration. This work provides an innovative approach for rationally designing high-performance supported Cu catalysts with a spatiotemporal decoupling structure applied in advanced heterogeneous tandem catalytic processes through the design of site-specific confinement within hierarchical structures.
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ACS Sustainable Chemistry & Engineering
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2026
·Vol. 14
·期 28
·12928-12941
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IF 7.6
Mehrizi Mohammad,Zhou Li,Lv Yuze,Zhang Yi,Gao Xiu,Zhang Zhenzhou,Liu Wenqi,Tu Weifeng,Han Yi-Fan
The reverse water-gas shift (RWGS) reaction is widely regarded as a platform reaction for the conversion of CO 2 into value-added products. In this study, Fe-based catalysts modified with Cu and K were systematically investigated to elucidate the roles of metal promoters in regulating RWGS performance. The results demonstrate that a K-promoted Fe–Cu(2/3)/Al 2 O 3 catalyst exhibits enhanced CO 2 conversion together with nearly 100% selectivity toward CO. A combination of ex situ and in situ characterization techniques reveals that the introduction of Cu can enhance CO 2 conversion by modifying the surface structure and redox properties of Fe species. Subsequent K promotion also alters the surface reaction pathway by favoring the carboxylate-related route while suppressing the accumulation of formate species, which further suppresses methane formation and improves CO selectivity. These findings highlight the critical role of Cu–K synergy in tuning catalyst structure and reaction pathways for efficient RWGS reactions.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2026
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IF 5.7
Van-Hien Pham,Nguyen Quang Tu Le,Bich-Ngoc Duong,Tran Duy Tap,Ngoc-Quyen Tran,Van-Phuc Dinh
Electron beam (EB) irradiation successfully shifted ETS-10 zeolite from a microporous to a mesoporous framework. • XRD and SEM confirmed crystalline framework and morphology remained stable under EB radiation up to 1000 kGy. • 1000 kGy dose expanded pore size to 8 nm and increased the specific surface area to 333 m 2 /g. • Modified mesoporous structure improved ion diffusion, yielding high capacities of 878.16 mg/g for Pb(II) and 181.69 mg/g for Cu(II). • Adsorption behaviour followed the Sips model, indicating a hybrid multilayer-to-monolayer transition on a heterogeneous surface. ETS-10 zeolite is known for its superior adsorption properties and high ion-exchange capacity, making it suitable for applications in adsorption. While the pristine ETS-10 framework possesses inherent acidic sites and a unique crystalline structure, its performance is often limited by its purely microporous nature. This study investigated the modification of ETS-10 using electron beam (EB) irradiation to enhance its capacity for removing Pb(II) and Cu(II) ions from aqueous solutions. Our results demonstrated that EB irradiation was a highly effective method for inducing a structural transition from microporous to mesoporous without compromising the structure of ETS-10 zeolite. Under EB irradiation dose of 1000 kGy, the specific surface area of ETS-10 increased to 333 m 2 /g, the pore size expanded to 8 nm, and the adsorption reached 878.16 mg/g for Pb(II) and 181.69 mg/g for Cu(II). The adsorption data for both pristine and irradiated samples were best described by the Sips isotherm model, suggesting a hybrid adsorption behaviour on a heterogeneous surface that transitions from multilayer at low concentrations to monolayer at higher concentrations. Treating titanosilicate ETS-10 with 1000 kGy electron beam (EB) irradiation significantly improved its cyclic reusability across five consecutive adsorption-desorption runs. These findings highlight the potential of EB irradiation as a powerful tool for tailoring the porosity of titanosilicate for advanced environmental remediation. Download: Download high-res image (127KB) Download: Download full-size image
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2026
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IF 7.1
Ziqin Ming,Haiqiang Liu,Qingshuo Geng,Shaoying Shi,Peng Wang,Ri Qiu,Yibo Ouyang
Copper metal is prone to corrosion in aggressive environments, which poses a significant challenge to the long-term reliability. Herein, we report a self-healing slippery anticorrosion coating constructed on copper substrate. First, ZIF-8 with an ordered porous architecture was grown in situ by electrodeposition and used as a micro/nanoscale lubricant reservoir. ZIF-8 film was subsequently modified with thiol molecules to lower the surface energy for realizing superhydrophobicity. Finally, dimethyl silicone oil was infused into the thiolated ZIF-8 framework to form a ZIF-8-based slippery liquid-infused porous surface (SLIPS). Electrochemical measurements reveal that |Z| 0.01 Hz is 4.01 × 10 8 Ω·cm 2 . After being immersed in NaCl solution for 336 h, the SLIPS preserves |Z| 0.01 Hz close to 10 7 Ω·cm 2 . Even after pronounced mechanical scratching, |Z| 0.01Hz still remains high value. Anti-icing tests further revealed a low ice-adhesion strength of 113 ± 2 kPa, nearly one-sixth that of untreated copper (628 ± 7 kPa). These results demonstrate that the ZIF-8-based SLIPS provides high corrosion resistance, self-healing capability, and anti-icing performance, offering a robust barrier for long-term protection of copper-based materials in harsh corrosive environments.
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APPLIED SURFACE SCIENCE
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2026
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IF 6.6
Nguyen Ngoc Huyen,Ngo Xuan Dinh,Pham Thi Tuyet Nhung,Ong Van Hoang,Tran Van Tan,Nguyen Duc Toan,De Pham-Cong,Pham Duc Thang,Anh-Tuan Le
Tunable cation distribution in spinel MCo2O4 enhances surface redox activity. • Microwave-assisted hydrothermal yields ZCO nanosheets and CCO nanorods with defects. • Oxygen vacancies and mixed cations boost interfacial charge transfer kinetics. • CCO/SPE shows high sensitivity and low LOD for Carbendazim detection. • Strong Carbendazim adsorption on spinel surfaces confirmed by experiment and theory. Spinel cobaltites MCo 2 O 4 (M is a divalent metal ion) nanomaterials have emerged as promising electrocatalysts for electrochemical sensing owing to their tunable cation distribution and redox-active metal centers. In this work, ZnCo 2 O 4 (ZCO) nanosheets and CuCo 2 O 4 (CCO) nanorods were prepared using a simple microwave-assisted hydrothermal method and subsequently employed to modify screen-printed electrodes (SPEs) for carbendazim (CBZ) detection. Structural analysis revealed distinct cation arrangements within the spinel lattice, particularly CCO exhibited mixed Cu/Co occupancy and abundant oxygen vacancies. Both modified electrodes significantly enhanced the electrochemical oxidation of CBZ compared with bare SPE, primarily due to the catalytic activity of the Co 3+ /Co 2+ redox couple. Notably, the CCO/SPE demonstrated superior sensing performance, arising from the synergistic effects of Cu 2+ /Cu + redox activity, high defect density, and one-dimensional morphology that promoted charge transfer and mass diffusion. The CCO/SPE sensor delivered promising analytical performance, featuring two linear ranges (0.1–10 and 10–500 µM), a detection limit of 0.07 µM, and a sensitivity of 5.97 µA µM −1 cm −2 . Combined experimental and theoretical analyses suggest strong CBZ adsorption on the MCo 2 O 4 spinel surface, highlighting spinel oxides as efficient electrocatalysts for CBZ pesticide sensing. Download: Download high-res image (241KB) Download: Download full-size image
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Peng Qian,Shiyu Li,Mingxing Zhu,Ranyun Wu,Chuanhuang Wu,Xiaoyan Zhong,Song Shu,Yahui Yang,Zhiliang Jin,Hui Su
Electrocatalytic nitrate reduction to ammonia is strongly dependent on the availability of active hydrogen (*H). Either insufficient *H supply or excessive *H accumulation at the catalyst surface can compromise ammonia production and Faradaic efficiency. To address this challenge, a RuNP/Cu NC catalyst was developed by constructing N-bridged Ru nanoparticles on a carbon‑nitrogen support anchored by single-atom Cu. In this architecture, Ru nanoparticles generate *H and establish a hydrogen-transfer pathway across the Ru nanoparticles/Cu single atoms interface, thereby promoting nitrate enrichment and subsequent hydrogenation. The RuNP/Cu NC catalyst achieved an NH 3 yield rate of 7.92 mg h −1 cm −2 with a Faradaic efficiency of 97.22%, together with an energy efficiency of 34.31%, far surpassing those of RuNP/NC (9.75%) and Cu NC (13.64%). Operando DRT analysis revealed accelerated interfacial charge-transfer kinetics on RuNP/Cu NC, facilitating hydrogen spillover from Ru sites to adsorbed NO 3 − species on neighboring Cu sites. In situ FTIR spectroscopy captured the key intermediate *NH 2 OH. Theory calculations further showed that the hydrogenation superhighway established at the strong metal-support (MSI) interactions interface lowers the hydrogenation energy barrier of NH 2 OH. This work establishes a hydrogen-regulated reaction pathway and demonstrates the advantages of MSI for efficient ammonia electrosynthesis. The immobilization of Ru nanoparticles on single-atom Cu NC generates interconnected Ru N and Ru Ru interfacial domains that function as rapid *H transfer superhighways across the catalyst surface. Download: Download high-res image (221KB) Download: Download full-size image
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MICROCHEMICAL JOURNAL
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2026
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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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LANGMUIR
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2026
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IF 4.4
Xing Zhong-Lei,Jiang Run-Yuan,Yang Ting-Yu,Zhang Li-Ping,Lan Hao-Ling,Wang Shao-Min,Yang Qing-Yuan
The close similarity in molecular dimensions and physicochemical
properties between n -butane ( n -C 4 H 10 ) and isobutane (iso-C 4 H 10 ) makes their separation a persistent industrial challenge. In this
work, we employ two copper-based coordination networks, Cu-APC and Cu-MPC , constructed from amino- and methyl-functionalized
pyrimidine-5-carboxylate ligands, respectively, for n -C 4 H 10 /iso-C 4 H 10 separation.
The two frameworks exhibit distinct interlayer channel apertures (5.2
Å for Cu-APC and 4.1 Å for Cu-MPC ), enabling a systematic comparison of pore-chemistry effects on
C4 isomer discrimination. Cu-APC exhibits a remarkable n -C 4 H 10 uptake of 33.6 cm 3 ·g −1 under the conditions of 298 K and 100
kPa, together with an adsorption ratio of 4.36 for an equimolar n -C 4 H 10 /iso-C 4 H 10 mixture. DFT calculations were performed to investigate the host−guest
interactions. The results indicate that n -C 4 H 10 is preferentially stabilized within the 2D framework
via synergistic C−H···π and C−H···N
contacts, with measured distances of 3.42 Å and 3.15−3.68
Å, respectively. Cyclic fixed-bed breakthrough experiments further
confirm the excellent stability and regenerability of Cu-APC , positioning it as a viable candidate for the energy-saving separation
of n -C 4 H 10 from C4 alkane isomers.
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