Biomaterials Science
·
2025
·
IF 5.7
Di Zhang,Luying Zeng,Xiangyu Chen,Shuiqing Zhou,Binghong Luo,Mingxian Liu
Atopic dermatitis is a typical chronic inflammatory disease with pathological characteristics of persistent immune activation and oxidative stress. The combined anti-inflammatory and antioxidant treatment can effectively block the inflammatory cascade while reducing oxidative damage. Halloysite nanotubes (HNTs) are the main component of the traditional Chinese medicine "Chishizhi", which shows the medicinal functions of astringency, hemostasis and astringency. However, the efficacy of HNTs alone in treating diseases is relatively weak, and its therapeutic effect can be improved by surface modification and drug loading. Herein, CuO-Fe3O4 nanoparticles were synthesized on the outer surfaces of HNTs by hydrothermal reaction. CuO-Fe3O4@HNTs has high SOD and CAT enzyme activities under neutral condition. Then, the nanozyme modified HNTs powder was prepared into sprayable hydrogels by introduction of sodium alginate (SA) and aloe vera extracts. Cell experiments confirmed that the hydrogel can promote HacaT cell proliferation within 0~200 μg/mL concentration. Through the mouse animal dermatitis model, CuO-Fe3O4@HNTs-SA composite hydrogel has a good therapeutic effect on atopic dermatitis. Comparing with the positive drug halcinonide solution, the CuO-Fe3O4 nanozymes incorporated hydrogel showed enhanced therapeutic effect, which shows promising prospects in the clinical treatment of atopic dermatitis.
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DOI
PubMed
高影响因子
Small
·
2025
·
IF 12.1
Le Liu,Feng Chen,Haowei Yang,Xiaoli Yan,Jie Ren,Yanhui Song,Junjie Guo
Although Cu-N 4 -C single-atom catalysts (SACs) is proven to be a potential substitute for oxygen reduction reaction (ORR), the rigid coordination structure of Cu-N 4 active sites hampers mass transfer and electron transport during the ORR process, limiting their catalytic activity. In this study, an asymmetric coordination strategy (Cu-N-C/Cl) is implemented by doping chlorine, which subtly modulates the electronic structure of the Cu-N 4 coordination environment in two dimensions. The Cu-N-C/Cl electrocatalysts with the optimized electronic structure exhibit outstanding ORR activity across all pH ranges with the half-wave potentials of 0.915, 0.74, and 0.67 V ( vs . RHE) in alkaline, acidic, and neutral electrolytes, respectively. Experimental and theoretical findings demonstrate that the incorporation of Cl is crucial for enhancing ORR performance. This modification efficiently disrupts the electron symmetry of Cu-N 4 , resulting in a positive shift in the d-band center of Cu and optimizing the adsorption/desorption of ORR intermediates. Notably, the Cu-N-C/Cl electrocatalyst also shows promising performance in a Zn-air battery (ZAB), achieving a peak power density of 286 mW cm −2 and a specific capacity of 797.2 mAh g −1 . Moreover, this novel catalyst displays exceptional long-term stability, maintaining continuous operation for over 600 h, highlighting its significant potential for practical applications.
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DOI
PubMed
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2025
·
IF 3.5
Hu Yaping,Zhai Shasha,Guo Yaping,Dang Shan,Li Jing,Yang Miao
Electrochemical reduction reaction of CO 2 (CO 2 RR) to C 1 and C 2 products can be achieved on Cu-based electrocatalysts. C 2 products exhibit higher energy density and economic value compared to C 1 products, making them more desirable as reduction products. However, the production of C 2 products on pure Cu catalysts involves multi-step proton-coupled electron transfer and C–C coupling steps, which are kinetically slow and result in poor catalytic activity and selectivity for the products. The cavity nanocubes Cu 2 O(0.13-AA), Cu 2 O(0.10-AA) and Cu 2 O(0.15-AA) catalysts were synthesized via wet chemical reduction by adjusting the concentration of the reducing agent. The electrochemical pre-reduction method was used to obtain Cu 2 O/Cu(0.13-AA), Cu 2 O/Cu(0.10-AA) and Cu 2 O/Cu(0.15-AA) catalysts for CO 2 RR. Cu 2 O/Cu(0.13 M-AA) catalyst achieves the high Faradaic efficiency (FE) of 39.98% for C 2 H 4 and 54.76% for C 2 products (C 2 H 4 , C 2 H 6 , and C 2 H 5 OH), with significant inhibition of the hydrogen evolution reaction. In situ Raman experiments demonstrate that the cavity structure of the nanocubes enhances the local concentration of *CO intermediates, thereby promoting the C–C coupling process and improving the selectivity of CO 2 reduction to C 2 products.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Meng Wu,Junhao Li,Yougui Yang,Ling He,Kunpeng Shi,Cang Zhang,Qi Wang,Yong Yang,Chunjian Wang,Dacheng Zhou,Jianbei Qiu
Multicomponent chalcogenide quantum-dot materials show significant potential in the fabrication of lighting displays, optoelectronic devices, and information-technology-based systems owing to their easily tunable optical bandgap. We used a melt-quenching method to synthesize nontoxic multicomponent chalcogenide quantum dots within a glass matrix. The results indicated that Cu + doping effectively tunes photoluminescence and nonlinear optical properties through mechanisms such as large stokes shifts, additional luminescent centers, and defect-energy levels. Moreover, the samples exhibited excellent photoluminescence efficiency, with maximum emission FWHM reaching 197.5 nm, and significant nonlinear refractive index enhancements. These properties validate the potential of the multicomponent sulfide quantum dot glasses for nonlinear optical and photonic device applications. Cu + concentration modulation allows precise control over both the photoluminescence and nonlinear optical properties, thereby positioning these quantum dot glasses as promising candidates for photonic device development.
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高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Minglei Lu,Yushen Liu,Fan Yang,Yuxin Ge,Xudong Shi,Yongqi Mao,Xinyuan Song,Zejian Li,Jiajin Li,Yuxiang Lyu,Guimei Liu,Zhuoyu Zheng,Yuan Yuan,Junwei Liao,Xitang Qian,Minhua Shao,Tiejun Wang
Ensuring safer and more satisfactory hydrogen (H2) production from aqueous-phase reforming of methanol (APRM) is crucial for automotive, marine, and aerospace applications. However, nonprecious metal catalysts face challenges in realizing efficient methanol (CH3OH) dehydrogenation and effective carbon monoxide (CO) suppression for APRM without a strong base. In this work, we synthesized Ga2O3-modified Cu–ZnO catalysts with carbon encapsulation, leading to a uniform Cu dispersion. The optimized 12 wt % GCZ-2.0-C450 catalyst exhibits good performance over a wide temperature range (130–210 °C). It achieves a high H2 production rate of 101.2 μmol/gcat/s and low CO selectivity (0.07%) at 210 °C with long-term stability, surpassing the reported Cu- and Pt-based catalysts in APRM. Density functional theory calculations indicate that the Ga2O3 introduction significantly reduces the Gibbs energy of the rate-determining step of *CH3O + *H → *CH2O + *H2, dropping from 1.25 to 0.60 eV. Meanwhile, the adsorption energy of the generated *H2 decreases from −2.92 to −0.13 eV, which facilitates the release of gaseous H2.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Ao Han,Gang Wang,Wei Wang,Yu Zhao,Rujie He,Caiwang Tan
Negative coefficient of thermal expansion (Sr 0.2 Ba 0.8 )TiO 3 (SBT) nanoparticles are produced by ball milling and twice sintering process and coated with Cu foam (Cu f ) as an interlayer for brazing SiC and Nb. The influence of SBT content on the microstructural, shear strength, and fracture mechanism of SiC/Nb joints is investigated. In particular, SBT/Cu f foam is utilized to modify the coefficient of thermal expansion of the AgCuTi/SBT/Cu f /AgCuTi composite filler, resulting in a reduction of residual stresses in the joints. The residual stresses at the joints are calculated as well as analyzed the mechanism of residual stress relief by SBT. Following the introduction of the interlayer, the maximum shear strength of the joint is approximately 72 MPa, which is 164 % higher than the performance of the joint with uncoated SBT.
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高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Dong Liu,Zelu Zhou,Zhitao Han,Mengjing Zhang,Aicheng Song,Xi Wu,Xiao Yang,Dong Ma
In recent years, significant attention has been drawn to the advancement of high-performance solid acid catalysts, which enhance the CO 2 desorption efficiency and concurrently lower energy requirements. Although solid acid catalysts show promise in reducing regeneration energy for amine-based CO 2 capture, achieving an optimal balance between activity, cost, and stability remains a major challenge. Herein a series of solid acid catalysts were prepared by modifying attapulgite (ATP) with various CuO x loading, and the effect of Cu modification on CO 2 desorption performance was compared systematically. The results showed that CO 2 desorption performance of the as-prepared catalysts was in an order of 2/1-CuO x /ATP >1/1-CuO x /ATP >3/1-CuO x /ATP > CuO > ATP. The CO 2 desorption capacity and rate were increased by 194 % and 205 %, respectively, the relative heat duty could be reduced by about 64.5 % by using 2/1-CuO x /ATP to regenerate the rich MEA solution. ATR-FTIR technique was employed to confirm the catalytic effect and a possible catalytic CO 2 desorption mechanism was suggested. Additionally, the catalyst maintained 81 % of its initial CO 2 desorption capacity after seven consecutive absorption-desorption cycles, demonstrating excellent recoverability. This study provides a practical strategy for utilizing efficient, affordable and environmentally benign solid acid catalysts for CO 2 desorption, thereby advancing energy-efficient CO 2 capture technology.
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PubMed
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2025
·
IF 2.4
Weimin Yan,Chengmin Hou
The composite particles (St/Fe3O4) were prepared using the co-precipitation method, whereby FeSO4 and FeCl3 were precipitated under alkaline conditions. The particles were composed of a starch matrix and Fe3O4. Subsequently, AA was grafted and cross-linked onto the composite particles (St/Fe3O4) via a one-step traditional free radical polymerization method, resulting in the formation of polymer-modified composite particles (St/Fe3O4-g-pAA). The initiator used in this process was 2,2’-Azobis(2-methylpropionitrile). The structures of St/Fe3O4 and St/Fe3O4-g-pAA were characterized by FTIR, thermogravimetric analysis and hysteresis loop. The impact of varying parameters, including the dosage of the St/Fe3O4 and St/Fe3O4-g-pAA adsorbents, the initial pH value of the Cu(II) solution, the initial Cu(II) concentration, the absorption time, and the temperature, on the adsorption behavior of Cu(II) was investigated. The results demonstrated that St/Fe3O4-g-pAA exhibited excellent adsorption performance for Cu(II), with a unit adsorption capacity of 123.92 mg/g and a maximum removal rate of 85% when the original concentration of the Cu(II) solution was 10. The experiment was conducted with 24 mg/L of Cu(II) at a pH of 7 at room temperature, with a mass of 1.5 mg of St/Fe3O4-g-pAA and an adsorption time of 3 h. The adsorption process followed the Langmuir model and the pseudo-second-order kinetic model, which was dominated by chemical adsorption and belonged to single-layer adsorption. The results of the renewable performance studies demonstrated that following eight cycles of adsorption, 92% of the initial adsorption effect was retained. It can therefore be concluded that the St/Fe3O4-g-pAA adsorbent material prepared in this work is an effective means of improving the adsorption rate of Cu(II).
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
·Vol. 14
·期 1
·120629
·
IF 7.2
Lijun Hu,Qian Huang,Meng Li,Ju Zhang,Qi Xue,Jiayi Wang,Caiwen Li
The parasitic dinoflagellate in Hematodinium genus causes significant economic losses to fishery and aquaculture of multiple valuable marine crustaceans. It is practically needed to develop an effective and environmentally compatible method to control the Hematodinium epidemics in mariculture. In the present study, a novel Z-scheme composite photocatalyst was synthesized successfully using Zinc oxide (ZnO) and Copper Metal-Organic Framework (Cu-MOF), The N-Cu-MOF photocatalyst showed superior charge carrier separation efficiency compared to Cu-MOF, and exhibited significantly improved visible-light absorption in contrast to the activation of ZnO only under UV light. The ZnO/N-Cu-MOF photocatalyst demonstrated excellent inactivation of Hematodinium perezi microspores, with half maximal inhibitory concentration (IC 50 ) values of 3.12 mg/L at 1 h and 1.01 mg/L at 2 h. The inactivation effects involved the generation of large amounts of intracellular reactive oxygen species (ROS), which induced oxidative stress and disrupted the membrane and flagella structural integrity of the dinospores, ultimately leading to cell necrosis induced by oxidative damage. The present study provided a new insight and approach for seawater treatment of mariculture facilities, thereby to prevent and control spreading of Hematodinium epidemics in commercially valuable crustaceans.
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高影响因子
Korean Journal of Materials Research
·
2025
·Vol. 35
·期 8
·352-365
·
IF 0.3
Haixia Wang,Yilei Sun,Yao Liu,Kunjie Li,Zeda Meng,Won-Chun Oh
The catalyst materials 0N-Cu-MOF, 1N-Cu-MOF, and 2N-Cu-MOF were successfully synthesized usinga solvothermal method, and using different concentrations of nitrogen-modified Cu organic frameworks (xN-Cu-MOF). Characterizations using X-ray diffraction (XRD), scanning electron microscopy (SEM), fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and Brunauer-Emmett-Teller (BET) surface area analysis showed that 1N-Cu-MOF had the largest SSA and pore size among the three materials synthesized. 1N-Cu-MOF exhibited the largest pore size and specific surface area among the three materials, which had a decisive effect on CO2 reduction. In addition, stability and CO2 reduction reaction (CO2RR) activity were evaluated by linear sweep voltmeter, cyclic voltmeter, electrochemical impedance spectroscopy, and time flow tests. Faradaic efficiency (FE) was determined by product analysis. Among the three catalyst materials, 1N-Cu-MOF showed the best catalytic performance at 50 mA·cm-2 (maximum current density). The charge transfer resistance was 8.23 Ω, the average current density was 19.9 mA·cm-2, and the FE of methane (CH4) production showed a high efficiency of 70.45 % when tested for 12 h at an overpotential of -0.35 V (to-RHE).
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高影响因子
ENERGY & FUELS
·
2025
·
IF 5.3
Qiulin Ye,Dongdong Wang,Jiabao Lv,Minghui Tang,Angjian Wu,Yaqi Peng,Shengyong Lu
The electrocatalytic CO2 conversion offers a sustainable pathway for generating ecofriendly chemicals and fuels while simultaneously enabling the storage of intermittent renewable energy. Herein, CuPd bimetallic catalysts were specifically designed through displacement reaction, with a magnetron sputtering Cu film as a substrate. The optimized CuPd catalyst achieved an ethylene Faradaic efficiency (FE) of 51.07% and a C2+ FE of 82.18% at a 200 mA/cm2 current density. In situ Raman spectroscopy indicates that the CuPd electrode exhibited a high local surface pH during the CO2 reduction reaction, which was favorable for C–C coupling. The observation of the *OCCOH intermediate by in situ FTIR, combined with density functional theory calculations, confirms that the CuPd surface promotes C–C coupling instead of direct hydrogenation. This mechanistic insight explains why the addition of Pd enhances the selectivity for C2+ products.
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高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Zaharaddeen N. Garba,Saadatu A. Hamza,Chavalit Ratanatamskul
In this study, a novel impregnation method was adopted by adding Cu 2+ to microcrystalline cellulose (MCC) powder, producing a composite material (Cu-MCC) that was used as a sorbent to treat water contaminated by crude oil. The produced Cu-MCC was examined using a variety of characterization techniques. With the application of central composite design (CCD) for testing the influenced parameters, the experimental and predicted oil sorption capacity (OSC) values were 10.61 and 9.86 mg/g, respectively at the optimal condition of initial concentration (120 mg/100 mL), sorbent dosage (80 mg) and reaction time of 78 mins. This indicates that the predicted values from the model agree closely with the experimental values, with only a small error of 0.75. The adsorption data were simulated using five different versions of the linearized Langmuir equations along with the Freundlich and Temkin adsorption isotherms. Langmuir-2, which denotes a monolayer sorption process best describes the equilibrium adsorption data giving maximum sorption capacity of 6.48 mg/g with pseudo-second order model as the best model for the kinetics data. The findings show that Cu-MCC is very promising as an effective material for cleaning up water contaminated from crude oil.
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高影响因子
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