ANALYTICA CHIMICA ACTA
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2026
·
IF 6.1
Nanke Ma,Anqi Wei,Huiling Peng,Lixia Xie,Yuan Jin,Zhengzhi Yin,Guangli Li
Background Chirality plays a critical role in drug efficacy and environmental safety. The antibacterial activity of ofloxacin resides almost exclusively in its S-enantiomer (levofloxacin, LEV), while the R-enantiomer contributes little to therapeutic effects but may pose unnecessary risks. Rapid and reliable methods for enantioselective determination of ofloxacin enantiomers are therefore essential for pharmaceutical quality control, food safety monitoring, and environmental analysis. However, existing electrochemical sensors often suffer from limited enantioselectivity and insufficient sensitivity. To address this challenge, a novel enantioselective electrochemical platform is developed. Results A β-cyclodextrin/cerium-doped copper metal-organic framework/carboxylated multi-walled carbon nanotube composite (β-CD/Ce-doped Cu-MOF/MWCNTs-COOH) was fabricated on a glassy carbon electrode. The sensor achieves discrimination of ofloxacin enantiomers with an I L /I D ratio of 3.39. DFT calculations at pH 4.0 reveal that β-CD binds LEV with higher adsorption energy (−63.8 kJ/mol) than DEX (−58.3 kJ/mol), confirming the superior response for LEV originates from stereospecific inclusion. Quantitative analysis of LEV shows two linear ranges (0.03–1 μM and 1–10 μM) with a low detection limit of 0.01 μM. The sensor also enables accurate determination of LEV percentage in enantiomer mixtures across 0–100%. Excellent selectivity against common interferents, good reproducibility (RSD = 0.98%), repeatability (RSD = 1.26%), and long-term stability (95.2% retention after 21 days) are demonstrated. Practical applicability is validated by detecting LEV in commercial eye drops, honey, and tap water with satisfactory recoveries (96.0–108.0%). Significance and novelty This work presents the first application of Ce-doped Cu-MOF/β-CD/MWCNTs-COOH composites for the enantioselective electrochemical sensing of ofloxacin, a chiral fluoroquinolone antibiotic. The synergistic combination of high conductivity, abundant catalytic sites, and stereospecific host-guest recognition provides a generalizable strategy for high-performance enantioselective sensing, with promising applications in pharmaceutical, food, and environmental analysis.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2026
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IF 6.6
Ya-Nan Li,Bo-Han Zeng,Yu-Lin Yuan,Huan Xiong,Ye Tan,Jin Hu,Lin-Ping Yu,Ju-Lan Zeng
Silica-based functionalized composite aerogels possess the merits of high porosity and versatile properties, and can be utilized as a matrix for lots of applications including shape-stable phase change materials (SSPCMs). In-situ functionalization of silica-based aerogel, which can avoid challenges related to the dispersion of functional filler, presents a valuable but less-explored strategy. Herein, metallic copper-functionalized silica (Cu–SiO 2 ) aerogels were synthesized by co-condensing tetraethyl orthosilicate (TEOS) and 3-aminopropyltriethoxysilane (APTES) in the presence of copper acetate via an ambient pressure drying procedure followed by thermal reduction. The Cu 2+ was initially coordinated to the amino groups in APTES and in-situ anchored on the aerogel skeleton, which was then thermally reduced to metallic copper to fulfill the in-situ functionalization. Erythritol (ET) was then vacuum impregnated into the Cu–SiO 2 aerogels to obtain SSPCMs. The prepared SSPCMs exhibited a high ET loading of 86.9%, corresponding to a high latent heat of 307.5 J g −1 , and reduced supercooling. When the aerogel framework contained 3.46 wt% copper, the thermal conductivity of the SSPCM increased by 83.03% compared with that of pure ET. The SSPCM also showed a photothermal conversion efficiency of 71.82% due to the local surface plasmon resonance effect of metallic copper and the multidirectional light-scattering paths provided by the aerogel. In addition, the SSPCMs exhibited excellent thermal reliability over 100 melting/solidification cycles. Overall, this work presents a novel strategy for the preparation of functionalized silica-based composite aerogels and obtained a novel SSPCM for latent heat storage and solar thermal applications.
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高影响因子
BIORESOURCE TECHNOLOGY
·
2026
·
IF 8.2
Fangfang Ye,Xiaoying Jin,Jiajiang Lin,Zuliang Chen
A nitrogen-doped and CaO-activated pinewood biochar ( N -aPBC) was synthesized. • Closed-loop recycling strategy enables electroplating wastewater treatment. • N -aPBC achieves high Fe 3 ⁺/Cu2⁺ adsorption capacities of 287.40/61.88 mg g⁻1. • N/O functionalities and defects promote Fe 3 ⁺/Cu2⁺ uptake via surface interactions. • Spent adsorbent-derived Fe-Cu-NaB removes 93.64% CIP from swine effluent. The efficient removal and resource recovery of high-concentration heavy metals like Fe 3 ⁺ and Cu 2 ⁺ from electroplating wastewater remains a critical challenge. Herein, a sustainable closed-loop “adsorption-transformation-upcycling” strategy was proposed. Initially, a nitrogen-doped and CaO-activated pinewood biochar ( N -aPBC) was synthesized via synergistic modification. Systematic characterization revealed that N -aPBC features a high specific surface area (188.79 m 2 g⁻ 1 ), a hierarchical porous architecture, and abundant nitrogen-containing functionalities. Adsorption experiments demonstrated superior performance for Fe 3 ⁺ and Cu 2 ⁺, yielding maximum capacities of 287.40 and 61.88 mg g⁻ 1 , respectively. Mechanistic investigations indicated that the adsorption followed the pseudo-second-order kinetic model and Langmuir isotherm, suggesting monolayer chemisorption. The primary removal mechanisms involved surface complexation via N/O-functional groups, coupled with electrostatic attraction and ion exchange. N species and defects tuned surface polarity and electronic structure. Subsequently, the spent adsorbent was calcined to produce a functional material (Fe-Cu-NaB). Electrochemical analyses confirmed that Fe-Cu-NaB exhibited lower charge transfer resistance and enhanced electrocatalytic activity. Notably, Fe-Cu-NaB enhanced the oxidative degradation capacity, achieving high removal rates of 93.64% for ciprofloxacin (CIP) and 65.88% for total organic carbon (TOC) in swine wastewater. This work provides a high-performance adsorbent for heavy metal remediation and establishes a viable pathway for the high-value reutilization of spent adsorbents as efficient catalytic materials. Download: Download high-res image (142KB) Download: Download full-size image
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Qinbo Cao,Xingguo Huang,Li Guo,Haohua Qin,Lingpan Du,Menglai Wang,Dianwen Liu,Peilun Shen
PS/Fe 2+ /Cu 2+ reagents inhibited PbS flotation with 30 s of reaction. • Cu 2+ raised the SO 4 • − yield in the PS/Fe 2+ /Cu 2+ solution. • SO 4 • − oxidized the PbS surface, producing PbO and SO 4 2− . • Cu 2+ raised the Fe 3+ concentration in solution and improved the Fe 2+ /Fe 3+ cycle. Galena (PbS) depression in PbS–chalcopyrite (CuFeS 2 ) mixture via SO 4 • − radicals generated from persulfate (PS)/Fe 2+ typically requires a high PS concentration (0.15 mol/L) and a prolonged reaction time (10 min). This study employed a combined Cu 2+ /Fe 2+ catalyst to enhance SO 4 • − generation at a lower PS concentration. Flotation tests were conducted to determine optimal PbS treatment conditions using the PS/Fe 2+ /Cu 2+ system. The results showed that effective PbS depression was achieved with a PS concentration of 6.5 × 10 −3 mol/L and a reaction time of only 30 s. The synergistic role of Cu 2+ was investigated using surface analyses, including contact angle tests, XPS, Raman and UV-visible spectra. Contact angle measurements revealed that after 30 s of treatment, the PbS surface angle decreased to 38.2°, whereas the CuFeS 2 surface remained hydrophobic. Oxidation products, including PbO and SO 4 2− , formed on the PbS surface. SO 4 • − and •OH both existed in the system to react with the PbS surface, and SO 4 • − was the major radical species as indicated by the radical quenching tests. UV–visible spectrum results implied that Cu 2+ increased the equilibrium Fe 3+ concentration, thereby facilitating the Fe 2+ /Fe 3+ cycle and sustaining PS activation. The rapid oxidation capacity of the PS/Fe 2+ /Cu 2+ system demonstrates strong potential for industrial application. Download: Download high-res image (202KB) Download: Download full-size image
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Chemistry-Switzerland
·
2026
·Vol. 8
·期 2
·18
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IF 2.6
Bo Yang,Xiang Yang,Minghong Long,Yanzhi Yang,Xuechun Xiao
Porous Cu/Cu2O catalytic materials with a unique pore structure were successfully synthesized via a one-step solvothermal method using Cu-MOF-74 as the intermediate, followed by induced collapse and oxidation. The structural properties and catalytic performance of the as-prepared Cu/Cu2O materials in the thermal decomposition of ammonium perchlorate (AP) were systematically investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET) surface area analysis, and thermogravimetry–differential scanning calorimetry (TG-DSC) combined with in situ thermogravimetry–mass spectrometry (TG-MS). The results show that the specific surface area of the Cu/Cu2O material is 46.6697 m2/g, and the average pore diameter is 9.4608 nm. Owing to the synergistic effect of Cu0/Cu+dual sites on promoting electron transfer during AP thermal decomposition, the Cu/Cu2O catalyst exhibits excellent catalytic activity. Specifically, at a heating rate of 20 °C/min, the addition of 2 wt% Cu/Cu2O reduces the high-temperature decomposition temperature of AP from 473.1 °C to 321.1 °C (a decrease of 151.0 °C), lowers the thermal decomposition activation energy from 296.63 kJ/mol to 253.21 kJ/mol (a reduction of 43.42 kJ/mol), and increases the heat release by 617.8 J/g compared to pure AP. TG-MS analysis revealed that Cu/Cu2O accelerates the decomposition of AP by adsorbing and activating NH3and HClO4generated in the low-temperature decomposition stage, facilitating the formation of reactive intermediates such as ClOₓ and promoting the oxidation of nitrogen-containing species. This study demonstrates that the porous Cu/Cu2O material synthesized by the one-step solvothermal method is a promising catalyst for enhancing the thermal decomposition performance of AP in solid propellants.
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高影响因子
Journal of Environmental Chemical Engineering
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2026
·Vol. 14
·期 3
·122557
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IF 7.5
Xiaomeng Li,Yaning Ma,Ruimeng Li,Yan Ge,Jiapeng Tang
The integration of multifunctional protective materials capable of simultaneous defense against ultraviolet (UV) radiation, O 3 , and reactive oxygen species (ROS) remains a challenge in interfacial materials science, primarily due to difficulties in constructing stable and catalytically efficient interfaces on flexible substrates. Herein, we report a cellulose-guided interfacial engineering strategy for the in-situ growth of copper-based metal-organic framework (Cu-MOF) nanozymes on nylon/spandex fabric. The key to this strategy lies in the pre-coordination of Cu 2 + with the hydroxyl groups of cellulose, which molecularly guides the ordered crystallization of Cu-MOFs within a regenerated cellulose network at the fiber interface, yielding a nanosheet structure with enhanced density and accessibility of catalytic sites. The resulting cellulose-MOF hybrid is firmly anchored to the fabric through a synergistic dual mechanism: physical entrapment within the regenerated porous cellulose network provides structural integrity, while chemical coordination between Cu 2+ and cellulose hydroxyls directs oriented growth and reinforces interfacial adhesion. This precisely engineered interface enables exceptional cascade antioxidant activity (mimicking superoxide dismutase and catalase), high UV protection (UPF > 100), and rapid ozone decomposition (first-order kinetic constant k > 0.478 min −1 ). The material also demonstrates robust interfacial adhesion, ensuring mechanical durability, breathability, and wash durability (>30 cycles). Biocompatibility was confirmed by skin irritation tests. This work highlights the critical role of biomass-templated interfacial microstructure in regulating catalytic performance and provides a green, scalable paradigm for designing advanced functional interfaces for environmental and biomedical protection.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Chang Liu,Xing Luo,Guowang Shen,Fengfeng Gao,Xueli Huang,Xueying Wang,Qinglong Luo
Ag NPs@Cu-ZIF-8: ZIF-8 modified by partial Cu 2+ doping and Ag NPs loading. • The electrode maintains 128.2 mg・g −1 capacity after 10 Br − cycles. • At optimal conditions, the electrode achieves 147.2 mg·g −1 maximum Br − capacity. • DFT proves Cu 2+ -Ag modification enhances Br − adsorption. Bromide ions (Br − ) are finite and non-renewable strategic resources, and their highly selective recovery is of great significance for the sustainable utilization of brine resources and ecological environmental protection. To address the shortcomings of conventional adsorbents such as poor electrical conductivity and insufficient active sites, an Ag NPs@Cu-ZIF-8 composite was successfully constructed via a synergistic modification strategy involving copper framework doping and silver nanoparticle loading in this study. The composite not only retains the inherent porous structural advantages of ZIF-8 but also effectively overcomes its poor electrical conductivity. Systematic material characterizations combined with density functional theory (DFT) calculations were employed to reveal the microscopic adsorption mechanism of the composite toward Br − in aqueous solution. The results demonstrate that the introduction of silver nanoparticles significantly enhances the electrical conductivity of the material and provides abundant active adsorption sites for Br − capture. Electrochemical test results reveal that the Ag NPs@Cu-ZIF-8 membrane electrode achieves a maximum bromide adsorption capacity of 147.2 mg·g −1 under optimal experimental conditions. The adsorbed bromide can be converted into elemental bromine through extraction, realizing efficient resource recovery. Cycling experiments indicate that the adsorption capacity only drops from 139.7 mg·g −1 to 93.5 mg·g −1 after ten adsorption-desorption cycles under conventional conditions, which reflects outstanding cycling stability. This material presents prominent advantages for the green and efficient recovery of bromine resources. Download: Download high-res image (104KB) Download: Download full-size image
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Yanjun Ye,Wenqi Feng,Hui Wang,Honghui Jiang,Juan Liu,Tongxiang Liang
Renewable-electricity-driven CO₂-to-CO electroreduction is a promising approach for sustainable carbon utilization, yet efficient CO production requires precise control of interfacial adsorption, proton-coupled electron transfer, and competing hydrogen evolution. Isolated metal centers are often constrained by linear scaling relationships, hindering the simultaneous optimization of CO₂ activation, *COOH formation, and suppression of the hydrogen evolution reaction. Herein, we report an N-doped carbon catalyst derived from zeolitic imidazolate framework-8, containing neighboring Cu/Ni sites that cooperatively regulate the CO₂-to-CO pathway. Aberration-corrected high-angle annular dark-field scanning transmission electron microscopy reveals atomically dispersed metal features and neighboring bright-spot configurations with a projected-separation distribution centered at approximately 2.35 Å, while localized electron energy-loss spectroscopy supports Cu/Ni coexistence within representative neighboring regions. The optimized catalyst achieves a CO Faradaic efficiency of approximately 99% at −0.70 V versus the reversible hydrogen electrode, with a corresponding CO partial current density of 31.78 mA cm⁻², and maintains stable operation for 52.3 h. Post-reaction scanning transmission electron microscopy and X-ray photoelectron spectroscopy further indicate that the atomically dispersed metal features and metal–N coordination environments are largely preserved after long-term electrolysis. Density functional theory calculations based on a representative adjacent Cu/Ni–Nₓ model show that the free-energy change for the potential-determining *COOH formation at the Ni-centered site is 1.08 eV. Electronic-structure analyses further suggest that neighboring Cu modulates the local electronic environment of Ni, contributing to site-differentiated interfacial reactivity. This work establishes a link between neighboring Cu/Ni sites, interfacial electronic modulation, and CO₂-to-CO performance, providing an interface-engineering strategy for selective CO₂ electroreduction. Download: Download high-res image (156KB) Download: Download full-size image
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高影响因子
DESALINATION
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2026
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IF 9.9
Karim Youssef Nabat,Ali Raza Ayub,Ahmed E. Mansy,Tesfa Oluma Fufa,Niu Zhang,Xiyan Xu,Hansheng Li,Hui Li
Green CMC/PVA based Schiff base bio-composite material successfully Fabricated • CMC/PVA-LH35 composite achieved adsorption capacity of 532.15 mg/g for Cu(II) • CMC/PVA-LA35 composite achieved adsorption capacity of 516.49 mg/g for Zn(II) • High reusability after 6 cycles with low-cost adsorbents for desalination • DFT computational analysis to elucidate the structural and binding mechanism Metal contamination in water sources is a critical threat to human health and water ecosystems, which reduces the efficiency of water desalination. Therefore, the development of materials for metal removal is essential for water purification. In this study, two novel Schiff bases (LA35 and LH35) were immobilized in a carboxymethyl cellulose/polyvinyl alcohol (CMC/PVA) matrix via robust hydrogen bonding. The CMC/PVA-LA35 and CMC/PVA-LH35 composite adsorbents achieved a maximal adsorption of 474.38 mg/g and 532.15 mg/g for Cu(II) and 516.49 mg/g and 468.04 mg/g for Zn(II), respectively, at optimum conditions, pH 5, 318 K, and 300 mg/L. The data fit the Langmuir isotherm model, suggesting that adsorption occurred on a homogeneous mono-layer surface with uniform binding sites. Additionally, a thermodynamic analysis confirmed the reaction was both spontaneous and endothermic. After six cycles of adsorption/desorption, the CMC/PVA-LA35 and CMC/PVA-LH35 maintained outstanding reusability with efficiencies of 76.72% and 81.69% for Cu(II) and 71.33% and 67.32% for Zn(II), respectively. DFT calculations revealed effective metal-ligand interactions via charge transfer and reduced bandgap. These findings were consistent with the large experimental adsorption capacities and confirm the importance of chemisorption for Cu(II) and Zn(II) removal. These findings reveal that metal chelation strength and complexation control the adsorption process. The results of the cost-effectiveness analysis showed that the total cost of reusability was extremely low. This discovery unveils its potential use in water desalination, offering new bio-composites to decrease metal contamination and protect aquatic life. Download: Download high-res image (171KB) Download: Download full-size image
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2026
·
IF 3.1
Lifeng Yang,Yirun Yang,Yi Zhu,Huajiang Zuo,Dongmei Deng
Cu(II) contamination in industrial wastewater constitutes a major challenge to global environmental management as traditional treatment methods are plagued by high energy consumption, secondary pollution risks, and substantial costs. A technical strategy was developed to prepare glutaraldehyde-crosslinked sodium alginate-zeolite (SA-HZ/GA) composite adsorption membranes via phase inversion. This approach leverages zeolites' structural reinforcement and mass transfer channel formation combined with glutaraldehyde's crosslinking properties to optimize material performance. SA-HZ/GA features abundant mesopores with sizes ranging from 2 to 16 nm and exhibits fracture strength over 74% higher than pure sodium alginate membranes. At pH 5 and 25°C, its Cu(II) adsorption capacity reaches 46.80 mg/g with over 80% removal efficiency maintained after 5 cycles with 0.1 M HCl as desorbent. The adsorption process fits the Langmuir model ( R 2 = 0.999) and follows pseudo-second-order kinetics, indicating monolayer chemical adsorption. Thermodynamic analysis revealed that the adsorption was spontaneous (Δ G = −12.5 kJ/mol) and endothermic (Δ H = 28.4 kJ/mol), with a positive entropy change (Δ S = 0.14 kJ/(mol·K)) suggesting increased randomness at the solid–liquid interface. This work provides an efficient, stable, and cost-effective engineering solution for heavy metal-laden wastewater treatment.
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高影响因子
ACS Omega
·
2026
·
IF 5.2
Tao Yang,Tao Wang,Tao Shen,Mingrong Dong,Jinkun Liu,Ming Ni,Yan Zhu
Targeting tumor-specific characteristics of acidic microenvironment, elevated H2O2 levels, and thermosensitivity, this study proposed and developed a copper-doped ZIF-8 nanoplatform coloaded with indocyanine green (ICG) and doxorubicin hydrochloride (DOX), designated as Cu-ZIF-8@ICG&DOX (CZID), to establish a multimodal therapeutic system integrating chemodynamic therapy, photothermal therapy, and chemotherapy. Results showed that the 25% copper doping level optimized the structure, achieving 7.46% actual doping content while limiting the average nanoparticle size to 99.6 nm. Dual loading of ICG and DOX induced morphological transition to spherical core–shell architectures, as confirmed by zeta potential reversal, with maximum drug loading capacities of 23.01 μg/mg for ICG and 122.43 μg/mg for DOX. The ZIF-8 framework exhibited pH-responsive degradation under acidic conditions. Released Cu2+ ions mediated continuous hydroxyl radical generation through glutathione-depletion redox cycling, confirming chemodynamic efficacy. Under 808 nm laser irradiation, ICG enabled enhanced photothermal conversion, showing concentration- and power-dependent temperature elevation. Cellular assays revealed efficient CZID internalization by MCF-7 cells, generating significantly higher intracellular reactive oxygen species levels under irradiation and more intense dead cell staining compared to CZI and CZD groups. Such an enhancement was attributed to photothermally accelerated ZIF-8 degradation, promoting Cu2+ ions and DOX release, thereby strengthening chemodynamic–chemotherapy synergy. At the working concentration of 50 μg/mL, CZID induced 95.36% apoptosis in MCF-7 cells while maintaining over 70% viability in MCF-10A normal cells, validating its precise antitumor potential.
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PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
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2026
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IF 7.9
Weitao Huang,Mumin Rao,Sizhe Chen,Jiayi Deng,Yabei Zhang,Chi Yu,Fa-Qian Liu
Biofouling in marine environments poses a severe threat to artificial facilities such as ship hulls, underwater structures, marine ranches, cross-sea bridges, and offshore wind power piles. Copper-containing antifouling coatings dominate the current market, but the excessive release of copper ions remains an urgent issue. Recently, slippery liquid-infused porous surfaces (SLIPS) have shown excellent potential in resisting fouling. However, the easy loss of lubricating liquids in complex marine environments limits their long-term stability. Therefore, developing novel antifouling coatings with long-term stability and environmental friendliness is crucial. To tackle these challenges, a SLIPS antifouling coating (Cu/MXene@uPDMS-oil) based on Cu/MXene composite nanofluid and a polydimethylsiloxane (PDMS) matrix was designed and fabricated. The addition of MXene nanosheets not only promotes the dissolution of copper ions but also enables the controlled release of copper ions through the labyrinth effect, thereby solving the problem of “initial rapid release followed by a slow release” in copper-based coatings. Furthermore, the low surface energy of PDMS, the intrinsic antifouling property of MXene, and the toxic effect of copper ions synergistically enhance the antifouling performance significantly. The inhibition rates against bacteria, Chlorella , and conchs reach 100%, 99.46%, and 100%, respectively. Notably, the introduction of copper particles and MXene into the nanofluids increases the viscosity of the silicone oil system, making it more difficult for silicone oil to be eluted from the coating surface. This endows the Cu/MXene@uPDMS-oil coating with excellent stability and prolongs its antifouling lifespan. In addition, the coating exhibits good hydrophobicity, self-cleaning property, and self-replenishing capability. This research provided a new idea and feasible approach for the development of long-term and environmentally friendly next-generation marine antifouling coatings.
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