POLYMER ENGINEERING AND SCIENCE
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2017
·Vol. 58
·期 1
·103-111
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IF 1.449
Bing Zhou,Zhubo Liu,Bin Xu,A.V. Rogachev,M.A. Yarmolenko,A.A. Rogachev
Polytetrafluoroethylene (PTFE) composite coatings doped with copper acetate and polyethylene (PE) were fabricated on rubber substrate by electron beam dispersion technique. The effects of dopant nature and glow discharge treatment on morphology, structural and tribological properties of the coatings were investigated. The results showed that Cu and PE doping change the surface structure of PTFE-based composite coatings due to the chemical reactions between the dispersion products. Cu-PE-PTFE coatings show the columnar and layered growth models without and with discharge treatment. Cu adding decreases the crystallinity, branched degree and unsaturated degree of PE coatings, but increases the branched degree and unsaturated bonds in the PE-PTFE coatings. Glow discharge enhances the crystallinity and ordering degree of composite coatings. Friction experiments indicated the significant difference of composite coatings in the nature of their destruction during friction. PE-PTFE coating is characterized of the brittle fracture with clear failure boundaries but Cu-PE-PTFE coating shows a rough surface without cracking and delaminating after friction. Cu doping increases the dynamic coefficient of friction of PE and PE-PTFE composite coatings, but discharge plasma decreases the dynamic coefficient of friction. Cu-PE-PTFE composite coating after discharge treatment has the decreased dynamic coefficient of friction and improved wear resistance. POLYM. ENG. SCI., 58:103–111, 2018. © 2017 Society of Plastics Engineers
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ENVIRONMENTAL ENGINEERING SCIENCE
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2015
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IF 0.991
Jianming Liu,Chao Wang,Zhenhu Xiong
A magnetic multiwalled carbon nanotubes (MWCNTs) nanocomposite was synthesized and was used as an adsorbent for removal of furazolidone (FZD) and Cu(II) from aqueous solutions. Influence of parameters on the adsorption capacity, including initial pH, contact time, and temperature, were investigated. Langmuir and Freundlich adsorption models were used for the mathematical description of adsorption equilibrium. Experimental data were analyzed by pseudo first order, pseudo second, and intraparticle diffusion order kinetic models. Thermodynamic parameters such as ΔH0, ΔS0, and ΔG0 calculated from adsorption process revealed that the adsorption process was spontaneous, exothermic, and a physical process in the experimental temperature range. Cu(II) had a strong suppression effect on FZD binding in the simultaneous adsorption and FZD preloading experiment. As for Cu(II) simultaneous adsorption and preloading, the impact of FZD on Cu(II) desorption was almost negligible. The practical application of magnetic MWCNTs and regeneration of magnetic MWCNTs for several cycles using hydrochloric acid and N,N-dimethylformamide were also investigated. Results of the study showed that the carbon nanotubes have good regeneration property and can be used as potential adsorbent for FZD and Cu(II) in water/wastewater.
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SEPARATION SCIENCE AND TECHNOLOGY
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2015
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IF 1.171
Yuanyuan Xu,Jinming Sun,Hou Chen,Liangjiu Bai,Yating Wang,Lili Yu
Poly(n-butyl methacrylate-co-pentaerythritolriacrylate) (poly(n-BMA-co-PETA)) gel was first synthesized via reversible-deactivation radical polymerization (RDRP) technique with Cu(0)/N,N,N’,N’-tetramethylethylenediamine (TEMED) as catalyst system, 2-cyanoprop-2-yl-1-dithionaphthalate (CPDN) as chain transfer agent, and N,N-dimethylformamide (DMF) as solvent. The results exhibited well-controlled characters of the new RDRP technique. The poly(n-BMA-co-PETA) gel exhibited preferable three-dimensional network cross-linked structure. It possessed high oil absorption capacity and perfect reusability. The maximum oil absorption capacity was 52.6 g/g. The gel may have a number of potential applications in controlling oil pollution. The influence factors on oil absorbency were discussed in detail as well.
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ELECTROCHIMICA ACTA
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2026
·
IF 5.8
Zizheng Fan,Dong Zhao,Qunshou Wang,Ling Chang,Liang Zhang,Junjie Yan,Haiyan Du,Mingyang Zheng,Wenxiang Wang,Wenli Pei
Pt-based high-entropy intermetallic (HEI) nanocatalysts have attracted widespread attention due to their promising catalytic performance. However, synthesis of HEI nanoparticles with fine size and highly ordered structure faces significant challenges. Herein, we employed Cu as a bridging element to successfully synthesize ultra-fine (5.23 nm), highly ordered Pt 4 FeCoNiCu-HEI nanoparticles. The moderate reduction potential of Cu facilitates uniform co-reduction, controlling nanoparticle growth. The low surface energy of Cu promotes its migration to the particle surface during high-temperature annealing, creating lattice vacancies that significantly lower the ordering energy barrier. The resulting nanocatalyst exhibits enhanced alkaline hydrogen evolution reaction (HER) performance, achieving low overpotentials of 15.8 mV and 96.8 mV at current densities of 10 mA cm -2 and 100 mA cm -2 , respectively – approximately half those of commercial Pt/C (36.2 mV and 206.2 mV). The nanocatalyst demonstrates outstanding stability, maintaining its performance after 10,000 CV cycles and 30 hours of chronopotentiometry testing. Density functional theory (DFT) calculations reveal that lattice distortion and multi-element doping synergistically lower the d-band center of Pt active sites, optimizing hydrogen adsorption free energy. Additionally, the transition metal constituents significantly reduce the energy barrier for the water dissociation step. This work presents a novel strategy for designing high-performance HEI nanocatalysts combining small size, high ordering, and optimized electronic structure. Download: Download high-res image (299KB) Download: Download full-size image
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Laser & Photonics Reviews
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2025
·
IF 10
Yandong Ren,Zhen Xuan,Jiben Yang,Jianbo Chang,Yuntong Jia,Xueai Yin,Yonghao Liu,Jia-ao Wang,Graeme Henkelman
The development of highly stable and optically tunable materials is crucial for next-generation patterning and anti-counterfeiting applications. This study presents a comprehensive investigation into the synthesis, structural dynamics, and optoelectronic properties of MA 4 Cu 2 X 6 (X = Cl, Br, Br/Cl) films fabricated via a three-step spin-coating technique. By leveraging halide anion engineering, the precise control over the coordination environment of Cu centers are achieved, as evidenced by synchrotron-based extended X-ray absorption fine structure analysis. Both their strong electron–phonon coupling and high exciton binding energies facilitate efficient self-trapped exciton emission. The photoluminescence emission is tailored from yellow to green and eventually to blue-green under ultraviolet excitation (254 nm). STE localization mitigates thermal quenching, achieving PLQYs >64%. Stability assessments indicate that mixed-halide compositions effectively suppress Cu+ oxidation, prolonging luminescence performance. Mixed halides enhance environmental stability, retaining >25% initial PLQY after 720 h in ambient conditions. Furthermore, the films demonstrate tunable diffraction properties in patterned photonic architectures, highlighting their potential for advanced optoelectronic devices. The films demonstrate high-resolution patterning capabilities via photolithography and screen printing, underscoring their potential for advanced optical security applications.
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CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Jiahui Liu,Hongchen Liu,Fan Yang,Junpu An,Siyuan Sun,Yang Sun,Kexin Wei,Xinyang Sun,Junwei Yuan,Meitong Zhao,Haojia Zhong,Kuobo Wang,Jintian Ren,Zhenxing Li,Yongfen Li
The electrochemical oxidation of biomass-derived 5-hydroxymethylfurfural (HMF) represents a promising pathway to synthesize the critical polymer monomer 2,5-furandicarboxylic acid (FDCA). However, the restricted adsorption of both HMF and OH − to the catalyst surface results in low activity and selectivity. To address this issue, this study introduced an electrochemically assisted strategy to synthesize Ni aerogel with Cu heteroatom doping (Ni 0.94 Cu 0.06 /NF), demonstrating excellent performance for HMF to FDCA conversion in alkaline media. The catalyst achieves 10 mA cm −2 at 1.307 V vs. RHE, with outstanding Hydrogen evolution reaction (HER) activity (10 mA cm −2 @11 mV). Notably, the conversion rate of HMF, the selectivity of FDCA and the Faraday efficiency can reach 99.5 %, 99 % and 97 %, respectively. Scanning Electron Microscope (SEM) and transmission electron microscopy (TEM) demonstrated that the aerogel's self-supported 3D framework with interwoven nanowire structure enables efficient exposure of catalytic sites. X-ray photoelectron spectroscopy (XPS) analysis further showed the modification with Cu forms unique Ni O Cu linkage within the catalyst's surface region, which effectively adjusts the electronic configuration of Ni sites and increases lattice oxygen content, thereby enhancing HMF adsorption. Density functional theory (DFT) revealed that the synergistic interplay between Ni and Cu markedly boosts the uptake capacity for both HMF and OH − , improves the rate-determining step (RDS) thermodynamics by reducing its barrier, and consequently accelerates the HMF oxidation reaction (HMFOR). Our findings elucidate fresh perspectives into the structure-performance relationship of nickel-based catalysts and offer a novel approach for designing advanced electrocatalysts for biomass upgrading.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
·
IF 9.6
Jingjing Wang,Zhihui Wen,Xinjie Wei,Jiancheng Wang,Junjie Liao,Liping Chang,Kechang Xie
Copper-based sorbents for adsorption desulfurization have attracted significant interest owing to their potential for high sulfur adsorption capacities. However, their practical application has been severely impeded by the ambiguous active-site structures and, more critically, a drastic loss of capacity in the presence of competing aromatic compounds. This performance bottleneck stems from the lack of electronic specificity in conventional Cu sites to differentiate thiophene from benzene, which leads to unselective adsorption. Herein, we address these challenges by constructing a well-defined single-atom sorbent through a one-pot seeding strategy that precisely anchors Cu 1 O pairs in the supercages of hollow Y zeolite, forming a stable Cu 1 -O 4 -Al 2 bridging configuration. Desulfurization experiments performed using pure benzene as the solvent show that the hollow Cu@Y zeolite achieved a record-breaking sulfur breakthrough capacity of 0.99 mmol/g with 12-fold improvement over conventional Cu Y zeolite, representing state-of-the-art performance among reported copper-based sorbents even under such strongly competitive conditions. After five regeneration cycles, the sorbent still maintained a high adsorption capacity. This Cu 1 -O 4 -Al 2 structure induces a tailored electronic environment where the Cu center becomes highly electron-deficient due to significant charge transfer (1.71|e|) to framework oxygen atoms. As a result, the Cu 1 -O 4 site strongly adsorbs thiophene (−106.8 kJ/mol) via σ-coordination in an η 1 (C) mode (Cu C distance: 2.17 Å), further stabilized by a secondary interaction between the sulfur atom and a framework oxygen (S O distance: 3.02 Å), resulting in a unique “bidentate anchoring” adsorption configuration. Crucially, the highly electron-deficient nature of the Cu centers prevents effective π-complexation with benzene due to insufficient back-donation capability, thereby suppressing competitive aromatic adsorption through electronic repulsion. In situ Fourier transform infrared (FT-IR) spectroscopy directly captured the unique vibrational fingerprint of thiophene undergoing σ-coordination at the Cu 1 -O 4 sites, alongside evidence of the promotion of oligomerization and C 4 species formation. This work not only deciphers the nature of high-performance Cu sites but also establishes an electronic-structure-centered design principle for sorbents targeting deep desulfurization in aromatic-rich environments.
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Journal of CO2 Utilization
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2026
·
IF 8.6
Shuai Hu,Xiaoxuan Zhu,Yan Li,Yu Zhang,Bin Du,Jianjun Su,Yan Zhu,Zhenfeng Wang,Yanming Wang,Gewen Yu,Jian Ding,Yuqing Wang,Xiaohui Guo
Take into consideration the backdrop of global energy crisis and rising carbon dioxide concentration in the atmosphere, to research and develop efficient catalysts for converting CO 2 into sustainable energy is crucial. Based on this background, this study employed the complexation combustion method to prepare CuNi nanoclusters (NCs) with varying atomic ratios and applied in catalytic hydrogenation of CO 2 to CO or methanol. Through systematic characterization techniques such as XRD, SEM, BET, in-situ XPS, EPR, and chemisorption, the crystal phase structure, morphological features, physico-chemical properties, and catalytic performance of the as-obtained catalysts were thoroughly analyzed. The results of activity measurements demonstrate that the electronic synergy between CuNi bimetals exerts a positive catalytic effect on CO 2 hydrogenation to methanol. Notably, the Cu 1 Ni 1 catalyst achieved the striking methanol selectivity (98.5%) while maintaining a higher conversion of CO 2 (11.4%). Specifically, thanks to the employment of acetic acid complexation together with the isolation and stabilization effects of Ni species, a considerable amount of metastable Cu + is detected in the obtained catalyst as evidenced by XRD and in-situ XPS, which synergistically interacts with Cu 0 and facilitates the redox cycling of Cu active sites for CO 2 hydrogenation. Besides, the CO 2 -TPD and EPR show that a higher concentration of oxygen defects and the resulting large number of basic sites with moderate strength greatly facilitate the adsorption of CO 2 and hydrogenation to methanol; however, the excessively sites with strong basicity which present on the surface of Cu 0 Ni 1 generate the strong adsorption of CO 2 molecules, making the reaction route turned to the reverse water gas shift which is conducive to the hydrogenation of CO 2 to CO. Thus, the bond strength between CO 2 and basic site could alternate the mechanism of catalytic reaction on supported copper based catalysts.
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ACS Applied Materials & Interfaces
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2026
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IF 7.8
Lidong Wang,Yongyan Sun,Yuting Sun,Changbin Zhang,Guixi Wang,Junnan He,Yan Zhao,Ming Li
Photodynamic therapy (PDT) holds promise for oral squamous cell carcinoma (OSCC) but is limited by the tumor microenvironment─specifically hypoxia, elevated glutathione (GSH), and the lack of tumor-selective photosensitizer activation. To overcome these barriers, we developed a GSH-activated nanoplatform Cu-TCPP(Zn)/Ti3C2Tx for fluorescence imaging-guided synergistic photodynamic/chemodynamic therapy (PDT/CDT). The system is constructed from two-dimensional Cu-TCPP(Zn) MOF nanosheets, where Cu2+ and Zn2+ completely quench the fluorescence and PDT activity of TCPP and surface-anchored Ti3C2Tx MXene. In the TME, overexpressed GSH reduces Cu2+ to Cu+ and abstracts Zn from the Zn–N4 complex, triggering nanocomposite disintegration to restore fluorescence, activate PDT, and simultaneously deplete GSH to reduce antioxidant defense. The resulting Cu+ catalyzes a Fenton-like reaction with endogenous H2O2 to generate •OH for CDT, while Ti3C2Tx acts as a catalase-like nanozyme, decomposing H2O2 into O2 to alleviate hypoxia, promote charge transfer, improve the utilization efficiency of photogenerated electrons, and enhance PDT efficacy. In vitro, the platform showed excellent biocompatibility and GSH-responsive activation, inducing 41.21% apoptosis in CAL-27 cells under 660 nm laser irradiation, significantly outperforming controls. In vivo, the nanocomposite accumulated efficiently in tumors via the EPR effect, suppressed tumor growth, and exhibited no observable systemic toxicity. This work provides a TME-responsive theranostic platform that integrates tumor-specific activation, GSH depletion, hypoxia alleviation, and enhanced ROS generation for precise and effective OSCC treatment.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Mabrook S. Amer,Prabhakarn Arunachalam,Ahmad A. Alsaleh,Zeyad A. Almutairi,Hazim M. Al-Otaibi,Abdullah Al-Mayouf
Developing efficient and selective electrocatalysts for electrochemical ammonia oxidation (eAOR), coupled with proper electrochemical processes, offers promising opportunities for recycling ammonia into valuable fertilizers and as a potential technology for energy production and storage applications. Here, we introduce Ni(OH) 2 /Ni x Cu y B@NF electrodes, developed by in-situ solvothermal methods, as highly effective and durable electrocatalytic materials. The eAOR features of Ni(OH) 2 /Ni x Cu y B@NF displays the smallest overpotential of 130 mV (at 50 mA cm −2 ) and attained a enhanced current response of 178.3 mA cm −2 (@ 1.60 V RHE ). As shown by the electrocatalytic features and stability of Ni(OH) 2 /Ni x Cu y B@NF films at 1.43 V for an eAOR of 50 mA cm −2 , the HER current was 100 mA cm −2 at 99 mV, the smallest value among all Ni-based electrocatalysts studied. Gas chromatography (GC) experiments show that ammonia produces N 2 in the electrochemical cell at different times. In the eAOR-HER system, impressive electrocatalytic performance has been observed with higher FE of N 2 and H 2 was 47 % and 27.1 %. A two-electrode arrangement of Ni(OH) 2 /Ni x Cu y B@NF needs only 1.53 V to split ammonia to acquire 10 mA cm −2 , which is lower than any other electrode material. Based on the results, Ni(OH) 2 /Ni x Cu y B@NF might be a suitable system for wastewaters bearing high levels of ammonia, generating more sustainable hydrogen from wastewater, and recycling fertilizers.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.1
Yaoting Wang,Kezhen Tian,Hao Yu,Wenjing Jiang,Zhaoquan Wen,Fujun Yin,Hong Zhao
A novel Cu-Cu 2 O/MnPtPd composite with enhanced peroxidase-like activity was synthesized and evaluated for colorimetric ampicillin (AMP) detection. The composite was prepared through in situ growth of Cu 2 O on a Mn-based substrate, followed by Pt and Pd nanoparticle incorporation to synergistically modulate its structural and electronic properties. This design markedly improved the catalytic decomposition of H 2 O 2 and the subsequent oxidation of 3,3′,5,5′-tetramethylbenzidine. The Cu + /Cu 2+ redox cycle dominates the catalytic process, while the synergistic interactions among Cu, Mn, Pt, and Pd promote H 2 O 2 activation to generate •O 2 − , identified as the primary reactive species driving the colorimetric reaction. Steady-state kinetics demonstrated high affinity and catalytic efficiency toward both H 2 O 2 and TMB, surpassing natural horseradish peroxidase. Based on this nanozyme, an enzyme-free colorimetric sensing platform for AMP was established, which exhibits a dual linear response in both low concentration range (0.05–100 μg/mL) and high concentration range (100–300 μg/mL), with a low detection limit of 14.5 ng/mL. The sensor showed excellent selectivity and anti-interference capability. Recoveries for AMP in real water samples ranged from 96.34% to 103.3% with RSD below 4.31%. These results demonstrate that the Cu-Cu 2 O/MnPtPd nanozyme provides a stable, low-cost, and high-performance alternative for non-enzymatic AMP detection in environmental and food monitoring.
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高影响因子
CARBON
·
2019
·
IF 7.466
Hao Ying,Weiwei Wang,Wenyu Liu,Le Wang,Shanshan Chen
Layer-by-layer synthesis of graphene films has been of considerable interest for the precise layer engineering. However, the additional graphene layer typically forms on the Cu surface but underneath the existing graphene layer, limited by the catalytic substrate mediated growth mechanism. This work introduces a reliable cobalt (Co) nano-powders (NP) assisted technique to synthesis the bilayer graphene (BLG) and multilayer graphene (MLG) layer-by-layer on Cu foil in one-step. With nanostructure and high-surface-area, the Co NP demonstrates much higher catalytic activity to provide long-lasting catalytic activity during the graphene growth. The growth of the BLG activated by the Co NP solely has been observed with the growth rate exceeding the Cu-catalyzed single layer graphene (SLG), which validates the superiority of the homo-epitaxial growth. Fully covered uniform Bernal-stacked BLG and high coverage tri-layer graphene are successfully achieved on Cu foils through the optimal growth conditions. This work creates a pathway toward effective production of BLG/MLG via layer-by-layer mode. The utilizing of the NP catalyst may serve as a more general technique for the one-step synthesis of other hybrid heterostucture.
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