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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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Guo Yu Yong,Lin Zhu Dai,Wan Ni Gan,Chen Yu Yang,Ting Li,Ying Ying Yang,Hao Jie Geng,Hong Qun Luo,Nian Bing Li
Sub-nanometer Cu are clusters are anchored on Ni-MOF offer abundant active sites. • Cu@Ni-MOF acts as a highly efficient tandem electrocatalyst for NO 3 ¯ reduction. • DFT calculations confirm the *H adsorption energy difference on Cu versus Ni sites. • Ni–O–Cu bridges enable reverse *H spillover from the Ni-MOF to Cu sites. Electrocatalytic nitrate reduction (NO 3 − RR) to ammonia offers a sustainable strategy for wastewater treatment and the balance of the nitrogen cycle. However, this process has long faced challenges from competing side reactions, low selectivity, and sluggish hydrogenation kinetics. Herein, we present a Cu@Ni-MOF catalyst, fabricated by anchoring Cu sub-nanoclusters onto a nickel-metal-organic framework (Ni-MOF) support, which demonstrates exceptional performance for NO 3 − RR. The catalyst achieves a peak NH 4 + Faradaic efficiency (FE) of 96.8% with a production rate of 0.44 mmol h −1 cm −2 and minimal NO 2 − accumulation, and near-total FE (∼100%), which indicates high selectivity and minimal side products. Integrating electrochemical analysis with theoretical calculations establishes a cooperative tandem mechanism: the Cu sites promote NO 3 − adsorption and conversion to NO 2 − , while the Ni-MOF efficiently dissociates water to generate hydrogen species (*H), which migrate via reverse hydrogen spillover through Ni − O − Cu bridges to facilitate further hydrogenation of NO 2 − intermediates on Cu sites. This synergistic process enhances intermediate conversion and overall catalytic efficiency, providing a promising strategy for sustainable electrocatalytic ammonia synthesis. Download: Download high-res image (155KB) Download: Download full-size image
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Xin Zhou,Wei Li,Jian Zhang,Ningruo Wang,Yizhou Tu,Yang Li,Yue Yuan,Ningjie Fang,Chuanshu He,Yang Liu
The complete dehalogenation and mineralization of halogenated organic pollutants have consistently posed a significant technical challenge in detoxification processes. The redox synergistic system effectively reduces the production of highly toxic, small molecular halogenated hydrocarbons during mineralization. The synergistic activation of sulfites by zero-valent iron‑copper materials enables rapid removal of efficiently eliminate florfenicol (FF), however, a comprehensive understanding of the mechanism is lacking. Here, we employed experimental data and density functional theory calculations to demonstrate that the synergistic degradation of FF is an interdependent and interconnected process. Specifically, the reduction process primarily follows the sequence of chlorine removal followed by fluorine removal, while the oxidation process primarily involves three key reaction sites at C11, C17, and C20, where hydroxyl substitution reactions occur. Notably, the dehalogenation process reduces the activation energy required for oxidation. The activation energy for the oxidation reaction at the C17 position is 6.34 kcal/mol, whereas after dehalogenation, it decreases to 5.84 kcal/mol at the same site. Oxidation also affects the distribution of internal charge density within the molecule, thereby influencing the dehalogenation reaction. Furthermore, both toxicity predictions and experimental results indicate that the substances produced by synergistic degradation exhibit significantly lower toxicity than those generated by oxidation alone. The degradation mechanism of FF by the redox synergistic system provides valuable insights into the detoxification of halogenated organic compounds.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2026
·
IF 8.7
Zhu Xiong,Huisheng Huang,Fenggui Chen,Shuying Kong,Fulan Zhang
Transforming agricultural waste into functional catalysts addresses both environmental and resource challenges. Specifically, cellulose from discarded carmine radish residue (CRC) was made into a porous support for copper nanoparticles (Cu NPs). Inherent brittleness limits cellulose-based materials' practical use, so hexamethylene diisocyanate (HDI) was introduced as a covalent crosslinker. This approach replaces partial interchain hydrogen bonds with urethane linkages, building a resilient three-dimensional (3D) network in the CRC matrix. FTIR, XRD and 2D-WAXS verified the crosslinking, while low-field NMR showed the chemical network accounted for roughly 66.77% of the system. Mechanical properties were notably enhanced: compressive modulus rose from 30 kPa to 130 kPa, compressive strength stayed at 80 kPa, and compressive strain increased from approximately 62% to 81%. Molecular dynamics simulations confirmed cohesive energy dropped from 101.83 kJ mol −1 to 56.27 kJ mol −1 , explaining improved energy dissipation. The toughened CRC scaffold was loaded with ∼35 nm Cu NPs to form a CRC/nano-Cu composite. When applied to catalytic dye degradation using NaBH 4 , the composite achieved near-complete degradation of methylene blue (MB) within 25 min. This performance dramatically outperforms the non-catalytic reaction, which only achieved 29% degradation after 240 min. Furthermore, electrostatic interactions driven by the electron-rich Cu surface conferred strong charge-selectivity for cationic dyes, while the composite retained robust reusability over 5 cycles and high activity under severe ionic interference. This work offers a novel strategy for high-value biomass waste utilization and a mechanism for designing strong bio-based catalytic materials by enhancing energy dissipation through covalent crosslinking.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
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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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Lingwu Meng,Maosheng Lin,Qirui Guo,Longzhao Zhang,Xiangyu Huang,Chenrao Hu,Shule Zhang,Weihua Ma
A novel Cu@SZN-2Si catalyst with both microporous and mesoporous structures was successfully fabricated using a new template agent (BCph-10-6-6). This catalyst showed outstanding catalytic performance in the selective catalytic oxidation (SCO) of triethylamine (TEA). Notably, in contrast to the conventional mesoporous Cu@SZ-2Si_CTAB synthesised with CTAB, Cu@SZN-2Si presented a flower-like nanosheet morphology. It boasted a higher density of Lewis acid sites and more surface-adsorbed oxygen (O ads ). Under the reaction conditions at 280 °C, the TEA conversion reached 100 %, and the N 2 yield was as high as 99.2 %. Moreover, in the presence of 10.0 vol% H 2 O vapour, the catalytic activity of Cu@SZN-2Si remained above 87.3 % at 280 °C and maintained stable operation for 130 h at 400 °C. Structural analysis coupled with DFT calculations revealed that Si incorporation enabled the crystallization of tetragonal ZrO 2 in the presence of SO 4 2− ions, while forming an amorphous SiO 2 that encapsulated the ZrO 2 surface. This structural characteristic significantly increased the number of isolated Cu 2+ species and acidic sites on the catalyst surface. The strong interaction between these isolated Cu 2+ species and acidic sites was crucial for promoting the adsorption and activation of TEA. In addition, in-situ DRIFTs results indicated that TEA first adsorbed on the Cu@SZN-2Si surface, followed by a thermal decomposition process. The cleavage of the C-N bond in TEA generated NH* intermediates, which were essential for N 2 generation and promoted the SCO of TEA.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Junfang Ding,Changjin Xu,Xinyi Yao,Kunming Hou,Yinkang Yang,Dan He,Hao Chai,Xiaomin Sun,Shanghong Zeng
The development of ultrafine metal oxide nanoparticles anchored on reducible oxide supports with precisely engineered interfacial active sites has emerged as a critical frontier in heterogeneous catalysis. However, conventional synthesis strategies struggle to reconcile high loading with ultrafine dispersion, often leading to nanoparticle aggregation and compromised stability. Herein, we present a coordination chemistry-driven strategy integrating the hard–soft acid–base principle with a water-etching process to synthesize ultrafine CuOx nanoparticles anchored on CeO2. By exploiting the differential coordination affinities of Ce3+ and Cu2+ with carboxyl ligands in a bimetallic BTC precursor, selective segregation during solvothermal synthesis was achieved. Ce3+ formed a stable framework with carboxyl groups, while Cu2+ underwent a hydrolysis-induced migration to surface defect sites. Regulating the Cu2+/Ce3+ ratio enabled precise control over CuOx dispersion, interfacial Cu–O–Ce bonding, and local structure. The optimized catalyst exhibited a remarkable Cu loading of 21.94% with high dispersion, lattice distortion, and enhanced metal–support interactions. Notably, the designed catalyst demonstrated exceptional stability under H2-rich streams, which achieved a CO conversion enhancement from 67.4 to 77.7% over 40 h through the interfacial stabilization of metastable Cu+-Ov-Ce4+ active configurations. Advanced characterization and density functional theory (DFT) calculations revealed that the enhanced interfacial Cu–O–Ce interactions and unsaturated coordinated CuOx species facilitated electron transfer, oxygen activation, and CO adsorption, synergistically boosting the catalytic performance via the Mars–van Krevelen mechanism. This work establishes a rational coordination chemistry-guided paradigm for designing high-performance catalysts with precisely engineered active sites.
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JOURNAL OF POWER SOURCES
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2025
·
IF 7.9
Tenglong Jin,Hongyan Zhuo,Linlin Feng,Zhen Fu,Miao Wang,Dongyang Xie,Wenmiao Chen,Yanli Chen
Efficient and low-cost electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are crucial for the development of zinc-air batteries (ZABs). In this study, we designed a Core-shell hollow zeolitic imidazolate framework (ZIF) material Cu-ZIF-67/ZIF-8 with Cu-doped ZIF-67 (Cu-ZIF-67) core and a ZIF-8 shell. The hollow structure (ZIF-67/ZIF-8-h) was constructed via solvent-assisted phase transformation. The hollow structure, characterized by hierarchical porosity, not only facilitated mass transfer but also served as a prerequisite for Cu SAC formation, leading to coexisting of Cu single atoms (Cu SAC) and Co nanoparticles (Co NPs) after pyrolysis. Cu SAC modulated the d-band center of Co NPs, optimizing the adsorption of oxygen-containing intermediates. In alkaline media, Cu-Co/CN-h exhibited excellent bifunctional catalytic activity, with an ORR half-wave potential of 0.93 V and an OER overpotential of 338 mV at 10 mA cm −2 . When used as the cathode in a flexible ZABs, Cu-Co/CN-h demonstrated a high peak power density of 108 mW cm −2 and outstanding durability over 60 h. This work innovatively provides a strategy for break traditional scaling relationships with hierarchal porosity and synergistic Cu-Co sites.
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Chemistry-Switzerland
·
2026
·Vol. 8
·期 2
·18
·
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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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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TALANTA
·
2026
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IF 6.1
Kaiqiang Yang,Junlei Liu,Yiming Yang,Wenying Li
Natural products and their synthetic analogs have historically been fundamental to drug discovery, making their identification crucial for pharmaceutical research. This work presents a nanozyme-based sensor array for precise discrimination and quantitative determination of seven phenolic acids in plant-derived natural products. By modulating ligand hydrophobicity, we engineered three POD-mimicking Cu-MOF nanozymes (Cu-MI, Cu-EI, and Cu-PI), with their catalytic activity exhibiting increased catalytic activity proportional to the ligand alkyl chain length. Based on this, a four-channel sensor array was constructed using the distinct activities of Cu-MI and Cu-PI. In this array, the target phenolic acids selectively inhibit the nanozyme-catalyzed oxidation of 3,3',5,5'-tetramethylbenzidine (TMB), generating unique fingerprint-like responses for each analyte. The array achieved 100% accurate classification of all seven phenolic acids using linear discriminant analysis (LDA) and hierarchical cluster analysis (HCA). Furthermore, the array allowed for the sensitive quantification of phenolic acids, offering a wide linear range (5–50 μM, R 2 > 0.99) and low detection limits (0.56–4.1 μM). The practical utility was rigorously validated through interference tests and the analysis of Lonicera japonica extracts. The assay accurately identified chlorogenic acid as the predominant phenolic acid in Lonicera japonica , determined its content, and demonstrated excellent accuracy with spike recoveries of 94.5–103.2%. This study establishes a robust and reliable strategy for the quality assessment of natural products.
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Metals
·
2018
·Vol. 8
·期 7
·481
·
IF 1.704
He Gao,Fuxiang Wei,Yanwei Sui,Jiqiu Qi,Yezeng He,Qingkun Meng
This study designed (Ti0.55Cu0.20Zr0.15Ni0.10)1−xSixamorphous alloys based on binary deep eutectics and examined the effect of silicon (Si) on the amorphous forming ability of the filler alloys. The results show that a certain amount of Si added to the filler metals could improve the amorphous forming ability of the alloys. Under the same experimental conditions, the Ti0.55Cu0.20Zr0.15Ni0.10filler metal with 0.5 wt % Si had the strongest amorphous forming ability compared to the other filler alloys containing different amounts of Si; its reduced glass transition temperature (Trg) was 0.5554, and its supercooled liquid phase region width (∆Tx) reached 60 °C. The (Ti0.55Cu0.20Zr0.15Ni0.10)99.5%Si0.5%filler metal designed in these experiments presented good amorphous forming ability and wettability. The brazed joint of SiC and TC4 obtained with this amorphous filler metal showed a shear strength of 102 MPa, indicating an increase of 122% compared to the brazed joint obtained with the filler metal without Si.
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