Materials Today Communications
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2025
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IF 4.5
Kang Li,Guoge Zhang,Wenfang Li,Shuoxun Jin,Ken Chen,Aihua Yi,Zhongmiao Liao,Wen Zhu,Yi Huang,Zhisheng Zhu,Min Wang,Jiajing Yang,Rujian Liang
The as-deposit (AD) and heat-treated (HT) Al-Cu alloy obtained via wire arc additive manufacturing (WAAM) technology was coated by plasma electrolytic oxidation (PEO), respectively. The reticular big Al 2 Cu grains in the AD Al alloy substrate evolved into numerous small particles and nano precipitates after the heat treatment. The thickness and surface roughness of the PEO coatings on both substrates were increased gradually with the increase of oxidation time. The coating on the HT Al alloy was deposited faster with a rougher surface structure. Although most Al 2 Cu grains were dissolved in the electrolyte at the earlier oxidation stage, some Cu-containing compounds and metallic Cu were gradually deposited in the coatings at the discharge spark oxidation period. The coatings were mainly composed of γ-Al 2 O 3 and α-Al 2 O 3 , and the ratio of α-Al 2 O 3 was increased obviously with the oxidation time. Besides, the coating on the HT sample consisted of a higher ratio of α-Al 2 O 3 than that on the AD alloy, especially at the end of PEO processing. The PEO coatings were made up of two sub-layers, a thin compact inner layer and a porous outer layer. In comparison, the coating on the HT alloy was a bit denser and more uniform. The substrates displayed a adhesion wear trait while the coated samples shew a slight abrasive wear manner over the abrasion test, with a still ball as the friction pair . and the coated HT alloy had a better wear resistance than the coated AD alloy did.
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高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2025
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IF 8.9
Xiang Li,Wenjie Zhao,Guosong Wu,Yinghao Wu
The harsh service environment in the splash zone poses serious challenges for the long-term durability of steel pipe piles. The basalt fibers (BF) reinforced-composite coatings have acquired great attention in various fields such as offshore wind power equipment and construction industry due to the high strength and chemical stability. However, the service life of BF reinforced-composite coatings is greatly restricted by poor interfacial compatibility between BFs and polymer resin. In this work, we fabricated a BF reinforced epoxy powder composite coating with excellent erosion resistance by constructing L-Cys@Cu MOF on BFs. The interfacial shear strength value between MBF and EP was 49.66 % larger than that of BF. Contrasted to EP, the adhesion strength between 2.5 %MBF/EP coating and the steel substrate was 79.65 MPa, which was increased by 24.67 %. Interestingly, the mass and volume loss of 2.5 %MBF/EP coating was decreased by 22.77 % and 21.16 %, respectively, compared with 2.5 %CBF/EP coating. These results demonstrate the broader applicability of BF in composite materials, arising from the synergistic effect of mechanical interlocking between MBF and EP and the formation of cross-linking network between L-Cys@Cu MOF and EP. This work provides a novel perspective for the development of BF reinforced-composite coatings with long-term erosion resistance.
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APPLIED CATALYSIS A-GENERAL
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2025
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IF 4.8
Shuai Hu,Xiaoxuan Zhu,Yan Zhu,Chenliang Zhou,Gewen Yu,Yanming Wang,Cong Wang,Zhenfeng Wang,Jian Ding,Yuqing Wang,Xiaohui Guo
To enhance the activity and selectivity of Cu-based catalysts in the CO 2 hydrogenation reaction, this study systematically investigated the regulation effect of Nd-doping on the structure and surface properties of different oxide support (MgO, Al 2 O 3 , ZrO 2 , and CeO 2 ), and further explored its influence on the state of Cu species as well as the catalytic performance in CO 2 hydrogenation to methanol. The results show that the introduction of Nd 3 + can effectively induce lattice distortion of the support which promotes the generation of oxygen vacancies and the formation of surface basic sites, thereby enhancing the interfacial electronic interaction between Cu and support and improving the stability of Cu + active centers. Among them, the Cu catalyst supported on Nd-doped ZrO 2 exhibited the best catalytic performance such as the high CO 2 conversion and selectivity to methanol. Various characterization (XRD, SEM, in-situ XPS, H 2 -TPR, CO 2 -TPD, and H 2 -TPD) results confirmed the key role of Nd-doping in regulating the oxygen defects, electronic structure, and Cu species distribution over support. This study reveals the structural regulation mechanism of Nd in constructing efficient Cu-based catalysts for CO 2 hydrogenation from the perspective of support engineering, providing theoretical basis and practical guidance for the design of new high-performance catalytic materials.
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FOOD CHEMISTRY
·
2025
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IF 9.8
Xishun Peng,Yiheng Yuan,Anjiang Lu,Cunwei Wang,Caizhen Zu,Haili Zhang,Zhongchen Bai
Glyphosate (Gly) residues in agricultural products have a serious health risk, so it is urgent to seek a sensitive and convenient method for recognizing Gly residues in food. In this study, we proposed an electrochemical surface-enhanced Raman spectroscopy (EC-SERS) sensor of polyaniline/reduced graphene oxide/Ag/Cu (PANI/RGO/Ag/Cu) film to detect Gly residues. The EC-SERS sensor of PANI/RGO/Ag/Cu film had a large specific surface area, which could increase the binding sites of cu 2+ /Gly clathrates for boosting specifically its SERS signal. Moreover, Ag/Cu nanoparticles on the surface of film could effectively increase the differential pulse voltammetry signal and SERS signal of Gly molecules. The limit of detection of EC-SERS sensor to Gly could reach 1.9 nM. In addition, the EC-SERS sensor we prepared could also sensitively identify Gly residues on fresh fruit peels. The PANI/RGO/Ag/Cu film we proposed in this paper has great potential for selective and accuracy detecting Gly residues in agricultural products.
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PubMed
高影响因子
Nanoscale
·
2019
·Vol. 11
·期 31
·14844-14856
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IF 6.97
Haoru Shan,Xiangyang Dong,Xiaota Cheng,Yang Si,Jianyong Yu,Bin Ding
The development of inorganic membranous catalysts with both large mesopores and superb flexibility is extremely favorable for the enhancement of their catalytic oxidation activity for the degradation of antibiotic pollutants in wastewater via sulfate radical-based advanced oxidation processes; however, there still exists a huge challenge for inorganic materials to simultaneously realize these two properties. Herein, metallic copper-doped carbon/silica nanofibrous membranes (Cu@C/SiO2 NFMs) with large mesopores, superb flexibility, and robust mechanical strength were fabricated through a sol–gel electrospinning and subsequent in situ carbonization reduction method. The synthesized Cu nanoparticles were homogeneously distributed throughout the mesoporous C/SiO2 nanofiber matrix, which enabled the resultant Cu@C/SiO2 NFMs to be applied as heterogeneous catalysts, and their catalytic performance was systematically assessed through activating persulfate for the elimination of tetracycline hydrochloride (TCH) in water. The fabricated Cu@C/SiO2 NFMs provided outstanding catalytic performance towards TCH with a high removal efficiency of 95% in 40 min and a rapid removal speed of 0.054 min−1. Moreover, the membranes could be facilely recycled through being directly separated from water without any post-processing. Such a facile strategy for preparing mesoporous and flexible metal-doped inorganic nanofibrous membranes may offer novel insights for designing new types of heterogeneous catalysts for antibiotic-containing wastewater treatment or other potential applications.
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高影响因子
APPLIED SURFACE SCIENCE
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2017
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IF 3.387
Xuedong Wei,Na Li,Xianming Zhang
It remains a huge challenge to develop non precious electrocatalysts with high activity to substitute commercial Pt catalysts for hydrogen evolution reactions (HER). Here, the C-Cu-DI and C-Cu materials with the copper based nanoporous carbon structures were synthesized by carbonizing MOF199 and DI-MOF199. The composite structure and HER electrocatalytic properties of the C-Cu-DI and C-Cu materials are studied. The results show that C-Cu-DI and C-Cu samples exhibit good catalytic activity. And C-Cu-DI sample through the addition of Dimethyl imidazole(DI) in the DI-MOF199 precursor has higher electrocatalytic activity than the C-Cu sample. The superior catalytic activity is attributed to the special composite structure of nanoscale deposition particles on the framework with plenty of nano pores and nano copper and few copper oxidation particles distributed or wrapped into the amorphous porous carbon phase. The nano copper and few copper oxidation particles in the C-Cu and C-Cu-DI catalysts maybe provide the more effective catalytic activity sites. The C-Cu-DI composite with large size spherical hollow deposition particles has higher conductivity, better BET surface area and reasonable micro-meso-macro porous distribution, so the overpotentials at the current density of 1 mA cm −2 and 10 mA cm −2 are respectively 270 mV and 390 mV vs. RHE. Although the HER activity has a big gap with commercial platinum catalyst, this study can provide an important experimental exploration for the design of copper based non noble metal/nano porous carbon composite HER electrocatalyst.
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高影响因子
RSC Advances
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2022
·Vol. 13
·期 1
·448-455
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IF 4.036
Kyong-Sik Ju,In-Ho Jang,Yong-A. Choe,Song-Chun Ri,Hyon-Tae Pak,Su-Ok Hong
A carbon supported Pt–Cu electrocatalyst was synthesized by the microwave-polyol method following acid-treatment and physically characterized by different techniques including X-ray diffraction (XRD) and transmission electron microscopy (TEM). Both potentiodynamic and potentiostatic measurements with pinhole on-line electrochemical mass spectrometry were carried out to study the electrocatalytic activity and reaction intermediates of Pt/C and Pt–Cu/C electrocatalysts during the ethanol oxidation reaction. The results of potentiodynamic and potentiostatic measurements showed that the Pt–Cu/C electrocatalyst has higher ethanol oxidation efficiency and incomplete ethanol oxidation to acetaldehyde and acetic acid prevails under the given conditions. After calibration of the m/z = 44 mass signal, the CO2 current efficiencies on Pt/C and PtCu-3/C were ∼7% and ∼12%, respectively, which reveal that the presence of copper enhances the complete ethanol oxidation to CO2.
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高影响因子
Desalination and Water Treatment
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2024
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IF 1
Xiaohui Liu,Yitao Liu,Jia Wei,Yuhan Zhu,Yifei Zhang,Luyi Xing,Jun Li
Recently, the use of biochar for wastewater treatment has become a central focus in environmental remediation studies. In this research, a simple and economical one-pot hydrothermal strategy was developed for the synthesis of iron-modified sludge-derived hydrothermal biochar (ISHB). The obtained optimum ISHB possesses abundant hydroxy, carboxyl and aromatic ring surface functional groups as well as relative high surface area and small particle size which contribute to the adsorption of the enhanced contaminants. The structure-activity relationship and the adsorption behavior between the ISHB and doxycycline (DOX) were explored. The loaded iron improved the adsorption capacity of ISHB from 51.65 to 78.93 mg g –1 at 20°C with an initial DOX concentration of 60 mg L –1 . As Cu(II) exists in the DOX solution, the adsorption of DOX is inhibited to 50.06 mg g –1 due to the site competition between DOX and Cu(II). Nevertheless, the adsorption of Cu(II) is promoted, which can be explained by the complexation between DOX and Cu(II).
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高影响因子
Canadian Journal of Chemistry
·
2018
·Vol. 97
·期 2
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IF 1.084
Tian Gan,Zhikai Wang,Mengru Chen,Wanqiu Fu,Haibo Wang,Junyong Sun
In this work, the Ag@Cu particles with yolk–shell nanostructure was prepared by facile solvothermal method, which was modified on glassy carbon electrode (GCE) to fabricate electrochemical sensor for the convenient and fast determination of p-aminobenzoic acid (PABA). The surface morphology and electrochemical properties of the as-prepared Ag@Cu nanocomposite modified electrode were characterized by scanning electron microscopy, transmission electron microscopy, chronocoulometry, and electrochemical impedance spectroscopy. Further, the electrochemical sensing of PABA was performed on the Ag@Cu/GCE using cyclic voltammetry and differential pulse voltammetry techniques, showing high catalytic activity. Under the optimal conditions, the sensor exhibited a wide linear range, high sensitivity, and low detection limit of 0.315 μmol/L for PABA. The developed sensor was also successfully applied for PABA detection in anesthetic and cosmetics with satisfactory results.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
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IF 6.97
Yongsheng Ren,Shun Ueda,Kazuki Morita
Based on (i) the low liquidus temperature of Si–Cu systems, (ii) low solubility of Cu in solid Si, and (iii) a strong affinity of Zr to B for the enhanced boride formation, a novel method to remove B from Si using Zr as a trapping agent via a Si–Cu solvent was developed in this study. B-bearing polygonal ZrBx precipitations found at the bottom of test samples were confirmed as ZrB2 by electron probe microanalysis. Thermodynamic analysis revealed that the solubility products of ZrB2 in a Si–Cu melt were 2.50 × 10–12 (1258 K, Si-57.0 atom % Cu) and 4.11 × 10–12 (1345 K, Si-50.0 atom % Cu). Finally, the compositions of Si–Cu alloys that can form stable ZrB2 particles were estimated by calculating the solubility products of ZrB2 and the equilibrium contents between B and Zr at different corresponding liquidus temperatures. The proposed method provides the potential for B removal via Si–Cu solvent refinement to realize the large-scale production of solar-grade silicon, thereby overcoming the key limitation to the sustainable utilization of solar energy.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Tao Zhang,Yan Liu,Chuncheng Yang,Limei Tian,Yuying Yan,Guoyong Wang
Besides composition , the electrochemical CO 2 reduction reaction (CO 2 RR) is also very sensitive to the structure of catalyst due to the complex intermediates. In this paper, a series of Cu-Ag biphasic catalysts with a similar average value of unimodal phase size distribution were synthesized. The phase interface area of the biphasic catalyst can be manipulated by the element ratio due to the unimodal phase size distribution. The catalytic performances of Cu-Ag biphasic catalysts for CO 2 RR to CO were studied and it is found the conversion selectivity heavily depends on the phase interface area. The maximum phase interface makes the original inert copper catalyst have excellent electrochemical performance . A high FE CO of 80.25% was attained with a partial current density of − 4.88 mA cm −2 at − 0.9 V vs RHE in Cu 50 Ag 50 and the FE CO was almost not attenuated within 25 h. The catalytic performances are even better than those of Ag 100 catalyst. The paper enlightens another way to reduce the dependence of electrochemical catalyst on noble metals. The phase interface can be further increased with less noble metal element proportion, for the methodology of this paper ignores the thickness of the phase.
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
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IF 7.2
Xinyue Liang,Weihong Zhang,Xiaolong Yao,Zhengyang Feng,Qingwei Bu,Wenwen Gong,Wei Wang,Chun Wang,Yingxue Sun
Adsorption-electrocatalytic oxidation is a promising technology for organochlorine removal; however, its practical application is hindered by electrode limitations in activity, stability, and mechanistic understanding. In this study, a copper-doped ZIF-8/multi-walled carbon nanotube composite electrode (Cu-ZIF-8/MWCNTs/CC) was innovatively designed. Adsorption-electrochemical batch experiments were conducted to systematically investigate the degradation behaviors of three typical organochlorine contaminants: 2,4-dichlorophenol (2,4-DCP), triclosan (TCS), and chloramphenicol (CAP), using MOF-based electrodes. The results demonstrate that compared to the undoped ZIF-8/MWCNTs/CC, the incorporation of Cu introduced additional mesoporous structures and Cu-N coordination bonds, which effectively enhanced adsorption performance based on the size-matching effect and d-band center theory. Furthermore, the highly reversible and kinetically rapid Cu 2 + /Cu + redox couple served as an efficient mediator for charge transfer, thus promoting the synergistic adsorption and electrochemical degradation of organochlorine contaminants. Notably, the material maintained considerable removal efficiency even under competitive conditions in multicomponent systems. Mechanistic investigation demonstrated that hydroxyl radicals (·OH) preferentially attacked critical chemical bonds (including C-Cl, ether, and amino groups) in accordance with density functional theory (DFT) predictions. This reaction pathway resulted in the generation of less toxic intermediates that were eventually mineralized into CO 2 and H 2 O. The ecological structure-activity relationships (ECOSAR) model further confirmed the low acute and chronic toxicity of the major degradation products. Moreover, the electrode maintained high removal efficiency across multiple consecutive cycles, demonstrating excellent stability and reusability. Collectively, this work proposes a novel strategy for the synergistic adsorption and electrocatalytic removal of organochlorine contaminants; thereby highlighting its significant potential for practical application.
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