COMPOSITES COMMUNICATIONS
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2025
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IF 7.7
Ke Zhang,Minghui Ou,Yujie Xiao,Zhiwei Wei,Li Yang,Yi Xie,Changsheng Zhao
Copper-based nanozymes have emerged as promising therapeutic agents for oxidative stress-related diseases due to their enzyme-mimicking properties. However, their development is still limited by poor biocompatibility, insufficient broad-spectrum free radical scavenging ability, and potential toxicity from Cu 2+ leakage. To address these challenges, we developed Cu@EA-BTC, a broad-spectrum antioxidant material, by integrating ellagic acid (EA) into copper-based metal-organic frameworks (Cu@BTC). The Cu@BTC serves as a stable copper source, while the EA endows the Cu@EA-BTC with broad-spectrum ROS scavenging and enhanced catalase (CAT)-like activity via facilitating the reduction of Cu 2+ to Cu + . As a result, the Cu@EA-BTC exhibits superior antioxidant properties and excellent biocompatibility, including both cellular and blood compatibility. Meanwhile, the Cu@EA-BTC effectively protects immune cells from oxidative damage, which indicates its potential for oxidative stress-related therapies. This study provides a promising strategy for developing safe and efficient nanozyme-based antioxidant materials for biomedical applications.
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Energy & Environmental Science
·
2024
·
IF 32.4
Liqun Wang,Jingting Jin,Wenzhi Li,Cunshuo Li,Leyu Zhu,Zheng Zhou,Lulu Zhang,Xia Zhang,Liang Yuan
Direct conversion of methane into high value-added products is of great practical significance. The synergistic effect in catalysts with dual-active components show potential to increase the methanol yield and selectivity. In this work, Cu–Pd/anatase is in situ generated and exhibits a relatively high methanol yield rate of ∼31 800 μmol gcat−1 h−1 and near-exclusive selectivity of liquid products (methanol). The reaction mechanism behind the heterogeneous catalysis process has been investigated. It is confirmed that copper ions hold the ability to produce hydrogen peroxide which can be further promoted by anatase. Chlorine ions can promote the stable adsorption of CO and the formation of *CH3 intermediates, facilitating high activity and selectivity for methanol production. Pd and Cu cooperatively dissociate methane, which promotes the formation of key configuration metal-CH3. The ˙CH3 intermediate desorption will be facilitated on Cu–Pd/anatase through the manner of electron regulation, which is proved by the combination of density functional theory calculations and in situ infrared spectroscopy. Methanol is formed when a ˙CH3 is desorbed from a copper site and combines with a hydroxyl radical.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
He Zhang,Zhanxiang Yin,Yaqiang Wang,Yi Wu,Youbo Xing,Xin Guo
Low carrier concentration and mobility have been the primary obstructions to improving the electrical transport properties of BiCuSeO thermoelectric oxides , particularly for excessively low carrier mobility , heavily impeding the development of its thermoelectric performance. Herein, high-pressure technology is adopted to tune the electronic structure motivating carrier mobility , incorporated with the contribution of Cu deficiency to carrier concentration, achieving high carrier mobility of 25 cm 2 V −1 s −1 and outstanding electrical conductivity of 2834.57 Sm −1 . Moreover, high densities of grain boundaries and dislocations are introduced by high pressure, accompanied by the effect of Cu vacancies, suppressing phonon transport and depressing lattice thermal conductivity , finally realizing an acceptable zT of 0.56 at 823 K in BiCu 0.97 SeO. This work demonstrates that high pressure can be compatible with other methods, realizing synergetic optimizations in coupled parameters and thus improving thermoelectric performance in BiCuSeO oxides.
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CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Zhikang Xu,Mingbin Gao,Xing Wu,Haibo Zhu
Pt-Cu bimetallic particles have been regarded as promising catalysts for propane dehydrogenation. The dispersion of Pt and Cu species on conventional supports always results in the formation of large Pt-Cu particles, and it is highly desirable to fabricate ultra-small Pt-Cu cluster catalysts for propane dehydrogenation. Herein, we used the isolated Cu species in the Cu-SSZ-13 to localize the Pt species and the alloying of Pt with Cu leads to a formation of ultra-small (<1 nm) Pt-Cu bimetallic clusters in the structure of SSZ-13. The structure of synthesized PtCu-SSZ-13 catalysts was studied by XRD, SEM, STEM, XPS, CO-FTIR, H 2 -TPR and EXAFS techniques, which demonstrates that Pt-Cu clusters are entrapped in the micropore of SSZ-13 and their migration can be greatly inhibited. The synthesized PtCu-SSZ-13 catalyst shows high activity and good regeneration in propane dehydrogenation. The optimized catalyst 0.3 %PtCu-SSZ-13 delivers propane conversion of 28.5 % (close to equilibrium conversion) with 100 % propane as feed under WHSV of 7.1 h −1 at 520°C, and its catalytic performance can be completely regenerated via calcination in air. Density functional theory (DFT) calculations indicate that the unique Pt-Cu bimetallic nanocluster structure reduces the energy potential for propane dehydrogenation as well as promotes the adsorption of C 3 H 8 and desorption of C 3 H 6 thus enhancing the activity of the PtCu-SSZ-13 catalyst.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Mengqiao Li,Liang Chen,Jing Sui,Geoffrey I.N. Waterhouse,Zhiming Zhang,Liangmin Yu
The rapid growth of the dyeing and printing industry has resulted in severe water pollution, posing significant threats to human health and ecosystems. To effectively tackle this challenge, this study presents a novel approach using marine biomass-derived carbon (kelp) combined with Prussian blue (FeCu-PBA) to synthesize carbon-based nanoclusters (Cu-Fe 3 C@KC) for efficient microwave-assisted degradation of high-concentration dyes. By optimizing the FeCu-PBA-to-kelp mass ratio (FeCu/KC), we tailored the material’s morphology and enhanced its microwave absorption properties, achieving rapid and effective dye degradation. Experimental results demonstrate that Cu-Fe 3 C@KC-3 degraded methyl orange, methylene blue, crystal violet, and rhodamine B with efficiencies of 99.37 %, 96.23 %, 94.67 %, and 99.77 %, respectively, within just 4 min. Mechanistic studies, including free radical capture experiments and electron paramagnetic resonance (EPR) analysis, revealed that superoxide radicals ( O 2 − ), holes (h + ), electrons (e − ), and hydroxyl radicals ( OH) were the primary reactive species in the degradation process, with OH playing a dominant role due to its strong oxidative capacity. This research highlights the dual advantages of Cu-Fe 3 C@KC-3: superior catalytic performance and cost-effectiveness. The innovative use of kelp as a precursor provides a sustainable and economical pathway for the large-scale treatment of dye-laden wastewater, addressing critical environmental challenges with significant practical implications.
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RSC Advances
·
2025
·Vol. 15
·期 3
·1658-1664
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IF 4.6
Xiuping Li,Jiaqi Wang,Bolin Yin,Kaihong Liu,Jingjing Zhao,Bo Jiang,Hexing Li
The hydrogenation of carbon dioxide into profitable chemicals is a viable path toward achieving the objective of carbon neutrality. However, the typical approach for hydrogenation of CO2 heavily relies on thermally driven catalysis at high temperatures, which is not aligned with the goals of carbon neutrality. Thus, there is a critical need to explore new catalytic methods for the high-efficiency conversion of CO2. Herein, we present a new class of catalysts, featuring phosphorus-doped amorphous ruthenium nanoparticles supported on copper nanoparticles, which capitalizes on the plasmonic effects of copper to achieve the photothermal transformation of CO2 to CO within a gas–solid flow system. Our findings indicated that the reaction efficiency in the presence of photothermal energy was over eight times greater than that with thermal energy alone. The catalyst system exhibited nearly 100% selectivity towards CO under mild conditions, with an impressive CO yield of 123.16 mmol g−1 h−1. This study highlights the significant potential of amorphous metal phosphides in photocatalytic CO2 hydrogenation under mild conditions and offers a fresh avenue for the robust catalysis of amorphous materials.
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ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Guofeng Wang,Shiwei Xu,Chao Deng,Yueyue Feng,Liying Huang,Qin Guo,Yajun Wang,Min Zhang,Qian Shi,Nannan Liu
Copper ions (Cu + and Cu 2+ ) are vital for physiological functions, and their imbalance is implicated in disease progression. However, simultaneous detection of both species is challenging due to their similar properties. Here, we report a dual-functionalized glass micropipette sensor enabling independent detection of Cu + and Cu 2+ . UiO-66-NH 2 was grown in situ on the inner wall to capture Cu 2+ via amino coordination, reducing ionic current. Glutathione-functionalized carbon nanotubes (GCNTs) coated on the outer surface bind Cu + , increasing SERS signal via enhanced surface defects. The sensor exhibits a wide detection range (10 -1 –10 5 μM), a detection limit of 0.1 μM, and allows simultaneous monitoring of Cu + /Cu 2+ in the physiological range (2–10 μM). It further distinguishes copper ion levels in MCF-10A and MCF-7 cells, revealing altered copper homeostasis in cancer. This platform offers a sensitive, selective tool for studying copper in biological systems.
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CATALYSIS LETTERS
·
2025
·Vol. 155
·期 6
·1-14
·
IF 2.4
Yang Ke,Zhou Bo,Dong Kun,Wu Yan,Huang Qu,Lv Jingbo,Wan Ziyi,Yang Mingzhu
With the acceleration of industrialization and urbanization, the treatment of organic pollutants in water bodies has become a global problem. Photocatalytic technology is regarded as an ideal solution due to its green and efficient characteristics. However, traditional powder catalysts have the problem of difficult recovery. Using copper foam as the substrate to load photocatalysts is a feasible solution. Cu/CuO/Cu 2 O with a core–shell structure was prepared by a simple solvothermal method based on copper foam. Under visible light irradiation, the Cu/CuO/Cu 2 O catalyst has a high catalytic efficiency for Congo red (95% within 180 min) and a significant adsorption and degradation ability for tetracycline hydrochloride. The results of the density functional theory calculation and electrochemical tests reveal that a Schottky heterojunction forms between Cu 2 O and CuO, the band gap of Cu 2 O is 0.57 eV, and the free energy of Cu/CuO/Cu 2 O is 0.24 eV, close to 0 eV, revealing the ternary composite’s possibility to evolve hydrogen. The heterojunction generated by Cu 2 O and CuO improves the material’s charge transport efficiency. Furthermore, this ternary composite based on copper foam easy to recycle and reuse, and can maintain nearly 90% degradation efficiency after 8 cycles. This concept offers a method for planning and building interfaces in nanocomposite structures. Graphical
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ACS Catalysis
·
2025
·
IF 13.1
Guihua Yan,Paulina Pršlja,Gaofeng Chen,Jiahui Kang,Yongde Liu,Miguel A. Caro,Xi Chen,Xianhai Zeng,Bo Peng
Syngas conversion into higher alcohols represents a promising avenue for transforming coal or biomass into liquid fuels. However, the commercialization of this process has been hindered by the high cost, low activity, and inadequate C2+OH selectivity of the catalysts. Herein, we have developed Cu/Co carbon wood catalysts, offering a cost-effective and stable alternative with superior selectivity for catalytic conversion. The formation of Cu/Co nanoparticles was found, influenced by water-1,2-propylene glycol ratios in the solution, resulting in bidisperse nanoparticles. The Cu/Co-CW-W1P1 catalyst (the ratio between water and 1,2-propanediol is 0.5:0.5) exhibited a remarkable CO conversion rate of 74.8% and a selectivity of 58.7% for C2+OH, primarily comprising linear primary alcohols. This catalyst demonstrated enduring stability and selectivity under industrial conditions, maintaining its efficacy for up to 350 h of operation. We also employed density functional theory (DFT) to analyze selectivity, particularly focusing on the binding strength of CO, a crucial intermediate for subsequent reactions leading to the formation of alcohols. DFT identified the pathway of CHx and CO coupling, ultimately yielding C2H5OH. This computational understanding, coupled with the high performance of the Cu/Co-carbon wood catalyst, paves the way to develop catalytically selective materials tailored for higher alcohol production from a nature-based source.
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Materials
·
2025
·Vol. 18
·期 10
·2315
·
IF 3.2
Songya Feng,Anxin Gao,Zihang Ma,Hongjie Xu,Zhiyong Xue
The general polyol methods used for synthesizing copper nanoparticles (CuNPs) usually require high temperatures to ignite the reduction reaction, which leads to the difficulty of controlling the particle size. Herein, a new polyol method for the size-controllable synthesis of CuNPs at low temperatures by adopting high-pressure hydrogen as the reductant is verified. It is proven that hydrogen is capable to reductively produce CuNPs at temperatures as low as 120 °C. The size of the CuNPs can be controlled between 19.29 nm and 140.46 nm by adjusting the hydrogen pressure, the reaction temperature, and duration. An empirical relationship between temperature and particle size is proposed. This work verifies a low-temperature strategy to synthesize nanoparticles with good size-controllability.
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ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Di Wu,Weiqin Wang,Yanna NuLi,Jun Yang,Jiulin Wang
To enhance the electrochemical performance of Se cathode for high-energy-density magnesium-selenium (Mg–Se) batteries with easily prepared nucleophilic (PhMgCl) 2 -AlCl 3 +LiCl/THF (APC-based) hybrid electrolyte, Cu doped Se@MC composites (Cu–Se@MC) with different Cu content (0.05, 0.10, 0.15, 0.20, 0.25 and 0.30) are prepared by impregnation reduction and melting selenization method. The composites are composed of a mixture of chain-structured Se and CuSe embedding in the microporous carbon, and the addition of Cu significantly improves reversibility and cycle life of the composites in the nucleophilic APC-based hybrid electrolyte. At the 0.25 Cu content, the cell exhibits 346.7mAhg −1 first discharge capacity and the specific capacity maintains at 112mAhg −1 after 200 cycles at a current density of 50 mA g −1 , which is superior to that with non-nucleophilic Mg(HMDS) 2 -(AlCl 3 ) 2 –MgCl 2 +LiTFSI/DME (HMDS-based) and MBA-(MgCl 2 ) 2 –(AlCl 3 ) 2 +LiCl/THF (MBA-based) hybrid electrolytes.
研究领域:
材料科学
·
电化学
·
电池技术
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
·
2021
·Vol. 32
·期 12
·1-14
·
IF 3.896
Wang Shijia,Liu Xiaoli,Lei Miao,Sun Junjie,Qu Xue,Liu Changsheng
The contamination of chronic wound with bacteria especially methicillin-resistant Staphylococcus aureus (MRSA) is considered as the major factor interferencing normal wound healing. There still remain great challenges in developing safe and effective wound dressings with wide-spectrum antibacterial functions. Alginate hydrogel is a common dressing for wound treatment. Copper is one of the trace elements in human body with inherent antibacterial activity. Traditional methods for preparing a structure-controlled copper-alginate antibacterial matrix are difficult however, due to the fast and uncontrolled gelation between alginate and metal ions. In this work, we report an electrodeposition method for rapid fabrication of copper cross-linked alginate antibacterial films (Cu 2+ -Alg) with controlled structure and copper content, which is relied on an electrical signal controlled release of copper ions from the reaction of insoluble salt Cu 2 (OH) 2 CO 3 and the generated protons via water electrolysis on anode. The results prove that the physical structure and chemical composition of the electrodeposited Cu 2+ -Alg films can be continuously modulated by the imposed charges during electrodeposition. In vitro tests demonstrate the film has Cu 2+ content-dependent bactericidal activities. Film’s cytocompatibility is well controlled by the imposed charges for Cu 2+ -Alg fabrication. The MRSA infected wound model in vivo also indicates that Cu 2+ -Alg film can effectively eliminate bacterial infection and suppress host inflammatory responses. We believe this study demonstrates a convenient and controllable strategy to fabricate alginate antibacterial dressings with potential applications for infected wound treatment. More broadly, our work reveals electrodeposition is a general and simple platform to design alginate films with versatile functions.
研究领域:
材料科学
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生物医学工程
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伤口愈合
·
抗菌技术
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