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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ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Ziju Yan,Yuchen Liu,Yuyun Chen,Fei Wang
This study presents the synthesis and application of a bifunctional modified magnetic chitosan microsphere (MCS-II) for the simultaneous removal of Cu 2+ and sodium dodecylbenzene sulfonate (SDBS) from electroplating wastewater. The adsorbent was functionalized with polyethyleneimine (PEI) and ethylenediaminetetraacetic acid (EDTA) and embedded with Fe 3 O 4 nanoparticles to enhance adsorption capacity and magnetic separability. Batch adsorption experiments demonstrated that MCS-II exhibited a maximum adsorption capacity of 141.0 mg/g for Cu 2+ (pH = 6, T = 55 °C) with a removal efficiency of 96 %, and a maximum adsorption capacity of 1632 mg/g for SDBS (pH = 2, T = 25 °C) with a removal efficiency of 95 %. Kinetic studies revealed that the adsorption processes for both pollutants followed pseudo-second-order kinetics, indicating chemisorption as the dominant mechanism. Isotherm analysis showed that Cu 2+ adsorption fitted the Langmuir model, suggesting monolayer coverage, while SDBS adsorption exhibited characteristics of both monolayer and multilayer adsorption. Thermodynamic parameters indicated that Cu 2+ adsorption was endothermic (ΔH > 0) and spontaneous (ΔG < 0), whereas SDBS adsorption was exothermic (ΔH < 0) and spontaneous (ΔG < 0). In binary systems, synergistic effects were observed, with SDBS enhancing Cu 2+ adsorption via additional binding sites, while Cu 2+ exerted minimal inhibition on SDBS removal. Characterization techniques (SEM, FT-IR, XPS, etc.) confirmed the successful incorporation of amino and carboxyl groups, which facilitated chelation with Cu 2+ and electrostatic/hydrophobic interactions with SDBS. Moreover, MCS-II demonstrated excellent recyclability and magnetic recovery: after 4 adsorption-desorption cycles, its Cu 2+ adsorption capacity remained at ∼85–92 % of the original, and SDBS removal rate stayed at ∼95 % through 5 cycles, maintaining high adsorption efficiency for practical application. This work provides a promising strategy for designing multifunctional adsorbents to treat complex wastewater containing both heavy metals and anionic surfactants, offering potential for practical environmental remediation applications.
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高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 12
·830
·
IF 5.3
Hou Hongming,Long Jiajun,Li Xianglong
The chelation interaction between sodium lignosulfonate (SLS) and Cu 2+ is exploited to construct an enzyme-free creatinine sensing electrode (SLS-Cu/SPCE) via one-step electrodeposition on screen-printed carbon electrodes (SPCE). SLS chelation moderates Cu 2+ electro-reduction kinetics, resulting in finely structured Cu particles with a uniform and dense distribution. These Cu particles, with abundant unsaturated coordination sites, enhance creatinine adsorption and promote specific complexation with Cu 2+ , thereby increasing the oxidation current response for sensitive detection. The SLS-Cu/SPCE achieved a 0.12 µM detection limit, a 10–300 µM linear range, high reproducibility, and long-term stability over 28 days. Tests in human urine samples showed good agreement with enzymatic assays (relative error < 16%). The SLS-Cu 2+ coordination strategy offers a novel approach for optimizing Cu-based enzyme-free electrochemical creatinine sensors. Graphical A sodium lignosulfonate-Cu 2+ chelation strategy produces refined copper particles on SPCE with abundant unsaturated sites. These sites enhance creatinine adsorption and Cu 2+ complexation, enabling highly sensitive non-enzymatic detection (0.12 μM LOD, 10-300 μM range) with strong anti-interference and excellent stability.
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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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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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CHEMISTRY-A EUROPEAN JOURNAL
·
2025
·
IF 3.7
Zheng Liu,Jun-Jie Fang,Zhi-Yi Wang,Yun-Peng Xie,Xing Lu
Graphical The inclusion of carboxylic acid ligands significantly impacts the structural arrangement of the metal core in Cu(I) alkynyl clusters, thereby affecting their fluorescence properties. Furthermore, the incorporation of ferrocene into these clusters has been noted to induce modifications in the electrochemical performance of the Cu(I) alkynyl clusters. Surface ligands play a pivotal role in the functional design of atomically precise Cu(I) nanoclusters. They act as protective agents, ensuring the stability of the Cu(I) clusters, while also influencing their structure and properties. This study delves into the synthesis, structure, and properties of innovative Cu(I) nanoclusters co-stabilized by carboxylic acid and alkynyl ligands. The findings reveal that these surface ligands wield a significant impact on the cluster's structure and can even modulate the luminescent characteristics of the Cu(I) alkynyl clusters. Moreover, density-functional theory (DFT) calculations shed light on how different carboxylic acid ligands affect the UV-visible absorptivity of paired Cu(I) clusters. In addition, ferrocene carboxylic acids were employed as protective ligands to impart electrochemical properties to the Cu(I) clusters. This research presents an effective methodology for synthesizing atomically precise Cu(I) clusters shielded by carboxylic acid ligands.
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SENSORS AND ACTUATORS A-PHYSICAL
·
2025
·
IF 4.9
Pengfei Zhao,Jijun Ding,Haixia Chen,Haiwei Fu
Wearable devices have great potential for development in the fields of human health detection and human-computer interaction due to its flexibility and portability. In this work, Firstly, the resistance response performance of paper/Cu/Al 2 O 3 to temperature is optimized by changing the sputtering time of Al 2 O 3 . Combining the resistance change and stability after one month, paper/Cu/Al 2 O 3 films with 1 min Al 2 O 3 layer is selected. Then, temperature sensor based on optimized paper/Cu/Al 2 O 3 and graphene/PVDF composite temperature-sensitive layers is fabricated. The sensor shows negative temperature coefficient, high temperature response and stability, which provides significant advantages in the field of temperature monitoring. The fastest response/recovery time of the sensor is 1.4 s and 10.48 s respectively, which is fast and reliable in capturing the temperature changes and thus has the capability of real-time temperature monitoring. Another outstanding feature of the sensor is its high linearity to temperature fluctuations (R 2 =0.947). This feature suggests that the sensor enables real-time resistance-temperature interaction. In addition, its practical applications will be explored. The sensor can quickly sense the temperature of fingers, hot water, and working mobile phones. At the same time, the excellent performance of the sensor enables it to achieve the function of illuminating the LED. It lays the foundation for the application of temperature sensors in flexible wearable device applications.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Caiqin Su,Defeng Hu,Hongtian Yang,Yide Han,Yufeng Liu,Ying Zhang,Xia Zhang
In this study, bi-functions of surface adsorption and laccase like catalysis were integrated by the hybrid membranes of Cu-MOF (Cu-2MI) uniformly incorporated polyvinylidene fluoride (PVDF) for the first time, which endow an unexpected utility in surface physical adsorption and chemical catalytic engineering. In which, the loading of Cu-2MI was varied to optimize the surface performance of the membranes. The adsorption conditions were optimized based on batch adsorption experiments, and the adsorption kinetics, isotherms, and thermodynamics were discussed by using theoretical models to elucidate the adsorption mechanism. In addition, the laccase-mimicking catalytic performance of these Cu-2MI/PVDF hybrid membranes was explored based on the colorimetric reaction of 2,4-dichlorophenol (2,4-DP). The laccase-like catalytic kinetics, including K m and V max , were determined, and their catalytic stability under varying pH, temperature, organic solvents, and storage time was systematically tested and compared to that of free laccase. The maximum adsorption capacity of the obtained Cu-2MI/PVDF hybrid membrane for acid fuchsin (AF) is 4789.5 μg cm −2 . Moreover, the hybrid membrane exhibits a good linear relationship in the range of 5.0–750 μM in adrenaline detection, with a detection limit of 3.60 μM. This work highlights the exceptional surface activity and stability of the Cu-MOF/PVDF hybrid membranes, which ensure promising applicability in surface physical and chemical engineering.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Bin Meng,Erping Cao,Liwei Jia,Yuhua Zheng,Yanbin Cui
A variety of Cu-Fe oxide supported on Na 2 CO 3 -modified activated carbon (CuFeNaAC-X) catalysts were prepared via the impregnation and calcination methods and their desulfurization performance was evaluated at low-temperature. By optimizing the loading content of Cu-Fe, the sulfur capacity of the CuFeNaAC-5 reached a maximum of 430.09 mg/g, surpassing most activated carbon (AC) catalysts. EPR testing revealed that the loading of Cu-Fe oxide can activate oxygen to form superoxide radicals ( O 2 - ·), thereby promoting the catalytic oxidation of H 2 S. XPS testing revealed that upon loading of Cu-Fe oxide, the formation of FeOOH can facilitate the catalytic oxidation of H 2 S to sulfur (S) through a chain reaction. Combining EPR and XPS analyses, Na 2 CO 3 modification modulates the content of O 2 - ·, directing the formation of S and then significantly improving the catalyst’s desulfurization efficiency. Furthermore, CO 2 -TPD testing revealed that Na 2 CO 3 modification promotes the ionization of H 2 S to HS - , thereby enhancing the catalyst’s desulfurization performance. Based on the distribution of sulfur species in used catalysts, and the results of characterizations, a possible desulfurization mechanism of CuFeNaAC-X has been proposed.
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FUEL
·
2025
·
IF 7.5
Jie Liu,Lin Yang,Wenju Jiang,Zhongde Dai,Lu Yao,Junfeng Zheng,Xingjian Wang
In this study, the Cu/C@Zeolite catalysts with carbon-zeolite bifunctional support was developed by using the zeolite-induced one-pot homogeneous synthesis of CuBTC composite (CuBTC@Zeolite). Three different zeolites (ZSM-5, 13X, NaY) and the activation conditions were discussed. Originating from the defective structure of CuBTC in the composite and its interactivity with the zeolite, compared to Cu/C, the Cu/C@zeolite catalysts had the hierarchical pore system, a higher content of oxygen vacancies, stronger redox properties, and more active Cu sites with smaller particle sizes and more Cu + /Cu 2+ coexisting valence states, in synergy with acid sites, all of these contributing to the improved catalytic activity for VOCs oxidation removal. The activity of toluene catalytic oxidation indicated by T 90 was in the order of Cu/C@NaY (268.5 °C) > Cu/C@ZSM-5 (280.0 °C) > Cu/C@13X (287.0 °C) > Cu/C (320.0 °C). They also performed a better activity for acetone and ethyl acetate oxidation, obtaining the lowest T 90 at 217.0 and 231.5 °C respectively when the Cu/C@NaY used. Moreover, the Cu/C@NaY and Cu/C@ZSM-5 performed good water resistance and stability, suggesting the potential in practical application scenarios. These findings underscored the potential of Cu/C@Zeolite catalysts for addressing complex VOCs in simultaneous catalytic oxidation.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Yanzhu Ye,Ying Liu,Zhongshui Li,Xiaohuan Zou,Hui Wu,Shen Lin
The Cu-In 2 O 3 /C nanocomposite was prepared by a simple solid-phase reduction method. The introduction of In 2 O 3 into Cu/C to form the Cu-In 2 O 3 /C nanocomposite evidently enhances the electrocatalytic activity for the selective reduction of CO 2 to CO. Specifically, the Cu-In 2 O 3 /C nanocomposite exhibits higher Faraday efficiency ( FE = 86.7%) at −0.48 V vs. the reversible hydrogen electrode (RHE) in the electrocatalytic reduction of CO 2 to CO and larger current densities (55 mA cm −2 ) under a low overpotential (−1.08 V vs. RHE). These indicate its superior performance over many of the reported Cu-based catalysts [1] , [2] , [3] , [4] . It was also found that by rationally adjusting the applied potential, tunable syngas can be formed, which can be used to synthesize formic acid, methyl ether, methanol, synthetic fuels, or other bulk chemicals through appropriate industrial processes. Furthermore, the Cu-In 2 O 3 /C nanocomposite maintains good stability in the electrocatalytic reduction of CO 2 . This work demonstrates a novel strategy to convert CO 2 into desired products with high energy efficiency and large current density under low overpotential by the rational designing of non-precious metal catalysts.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Tingting Yu,Lei Tao,Zhiyi Liu,Xuge Zhang,Tao Gan,Wensheng Yan,Lirong Zheng,Ge Meng,Wei Chen,Shoujie Liu,Chenliang Ye,Jian Zhang
Unique active sites make single-atom (SA) catalysts promising to overcome obstacles in homogeneous catalysis but challenging due to their fixed coordination environment. Click chemistry is restricted by the low activity of more available Cu(II) catalysts without reducing agents. Herein, we develop efficient, O-coordinated SA Cu(II) directly catalyzed click chemistry. As revealed by theoretical calculations of the superior coordination structure to promote the click reaction, an organic molecule-assisted strategy is applied to prepare the corresponding SA Cu catalysts with respective O and N coordination. Although they both belong to Cu(II) centers, the O-coordinated one exhibits a 5-fold higher activity than the other and even much better activity than traditional homogeneous and heterogeneous Cu(II) catalysts. Control experiments further proved that the O-coordinated SA Cu(II) catalyst tends to be reduced by alkyne into Cu acetylide rather than the N-coordinated catalyst and thus facilitates click chemistry.
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