Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122789
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IF 7.5
Dancheng Zhu,Caiyun Zhang,Jiabin Shen,Chao Shen,Chuanhong Jin,Hao Xu
Sulfamethoxazole (SMX), a widely used sulfonamide antibiotic, is a persistent aquatic pollutant due to its resistance to conventional treatment. Here, a Cu-ZSM-5/Ti 3 C 2 composite catalyst was fabricated by electrostatic self-assembly for peroxymonosulfate (PMS) activation. Characterization by XRD, SEM, TEM, XPS, and zeta potential analysis confirmed the successful integration of the components. The catalyst achieved 97.59% removal of 10 mg/L SMX within 30 min. Quenching and EPR results indicated that 1 O 2 was the major reactive species. The enhanced performance under alkaline conditions was associated with the negatively charged composite surface (-38.8 mV at pH 9), the deprotonated state of SMX, and favorable interfacial interactions that may promote preferential oxidation of the isoxazole moiety. Control experiments using a physically mixed sample showed markedly lower activity, especially at pH 11, highlighting the importance of the intimate heterointerface created by self-assembly. The superior activity was attributed to the synergistic interaction between Cu species in Cu-ZSM-5 and Ti-based sites in Ti 3 C 2 . This work provides insight into designing selective PMS activation catalysts for antibiotic-contaminated water treatment.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
·
IF 5.4
Yan Chen,Chao Lei,Kun Yang,Ming-Li Ye,Yong-Gang Zhao,Yun Zhang
Metal organic frameworks (MOFs) are widely employed as separable and highly efficient adsorbents in VOCs (volatile organic compounds) pollution in the air. However, due to poor stability and easy hydrolysis in water, traditional MOFs cannot yet be used for the removal of VOCs in wastewater. Here, a novel series of magnetic Fe–Cu bimetallic MOFs possessing dual hydrophilic and hydrophobic functionality was prepared for VOCs removal in wastewater. The materials were characterized using scanning electron microscopy (SEM), vibrating sample magnetometry (VSM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The results indicate that both of the morphological and adsorption performance of magnetic Fe–Cu bimetallic MOFs are highly dependent on the molar ratio of ethylenediamine to 4,4-bipyridine used during synthesis. When the molar ratios of ethylenediamine to 4,4-bipyridine are 5:1, 1:1, and 1:5, the morphologies of prepared magnetic Fe–Cu bimetallic MOFs are gravel-like, cobble-like and calcite-like, respectively. They are named as magnetic gravel-like Fe–Cu metal organic frameworks (Mag-Gra-Fe-Cu MOFs), magnetic cobble-like Fe–Cu metal organic frameworks (Mag-CoL-Fe-Cu MOFs) and calcite-like Fe–Cu metal organic frameworks (Mag-CaL-Fe-Cu MOFs). Moreover, the maximum adsorption capacity of Mag-Gra-Fe-Cu MOFs, Mag-CoL-Fe-Cu MOFs and Mag-CaL-Fe-Cu MOFs could reach up to 487.80–621.12 mg/g, 549.45–666.67 mg/g and 598.80–724.64 mg/g, respectively. Under optimal conditions, the adsorption of VOCs onto the magnetic Fe–Cu bimetallic MOFs followed the pseudo-second-order kinetic model (R² = 1) and the Langmuir isotherm model (R² > 0.999). Consequently, the magnetic Fe–Cu bimetallic MOFs developed in this work represent a viable and efficient option for removing VOCs from wastewater. Download: Download high-res image (251KB) Download: Download full-size image
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
·
IF 19.7
Jiawei Wang,Jiacheng Li,Fumin Wang,Xubin Zhang,Shuai Liu,Shuai Niu,Liang Chen,Xu Wu
Stabilizing the Cu δ+ (1 < δ < 2) valence state during CO 2 reduction reaction (CO 2 RR) process is essential to enhance the C-C coupling and further promote the conversion of CO 2 into value-added C 2+ products. Herein, we propose a new strategy to stabilize the Cu δ+ under the synergistic effect of 4f orbital and oxygen vacancies (O v ) through the construction of Ce doped CuO with enriched O v via symbiotic strategy (CuCeO-O v ). Theoretical calculations and experimental results show the derived gradient orbital coupling O v -[Ce 4f-O 2p-Cu 3d] unit with Ce 4f as electron buffer as well as O v as electron supply station can facilitate the electron itinerancy during CO 2 RR process, which is beneficial to reinforce the Cu-O covalency and inhibit peroxidation of Cu δ+ , thus endowing CuCeO-O v with a highly active (Faradaic efficiency of C 2 H 4 reaches 51% at −1.3 V vs. RHE) and stable bidirectional self-regulating capability (the current density and FE of C 2 H 4 show virtually no attenuation even after 13 h) simultaneously. This work not only gives a profound insight to the synergistic effect of dopants and O v in metal oxides but also provides new guidance to structural design of high-performance insert materials.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122829
·
IF 7.5
Peijun Li,Weicong Xu,Xing Wang,Chao Liu,Anze Ning,Qingwen Chen,WulejiasiI Aerxin,Tao Li,Haowei Huang,Rui Xiao
The electrochemical conversion of CO₂ into gaseous hydrocarbon fuels (CH₄ and C₂H₄) has become a prominent research focus, relying heavily on high-performance catalysts. In this study, commercial pure Cu foil was etched with FeCl₃, utilizing a simple etching approach to alter the etching time (30 s, 60 s, 90 s, and 120 s) to reconstruct the Cu foil surface and form active centers such as grooves and cube-like Cu nanoparticles. The hydrogenation of the *CO intermediate and C–C coupling were facilitated by these features, thereby promoting the formation of gaseous hydrocarbon products during CO₂ electroreduction. By varying the etching time, the groove morphology and the size, surface area, and roughness of the cube-like Cu nanoparticles were systematically tuned. The Cu foil electrode etched for 60 s exhibited the highest surface area and roughness, together with cube-like Cu nanoparticles of approximately ∼43.89 nm, thereby providing optimal active sites for *CO adsorption and selective hydrocarbon formation. At −1.2 V versus RHE, a total hydrocarbon Faradaic efficiency (FE) of 64.94% was achieved, including 33.34% for CH₄ and 31.60% for C₂H₄. These results demonstrate an effective strategy for promoting selective hydrocarbon production during CO₂ electroreduction.
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ADVANCED FUNCTIONAL MATERIALS
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2026
·
IF 19.9
Xiangji Zhou,Zhilong Zheng,Jian Zhang,Jiapeng Ji,Xiaolong Zhang
The precise control of product selectivity in the electrochemical CO 2 reduction reaction (ECR) toward specific multi-carbon (C 2+ ) compounds remains a significant challenge. This work demonstrates that incorporating germanium (Ge) into copper (Cu) nanoparticles to form a solid solution effectively tunes the surface electronic states of Cu, thereby steering the C 2+ product distribution from ethylene toward ethanol. First-principles calculations predict that an optimal Ge content (Cu 94 Ge 6 ) optimizes the Cu 3d orbital hybridization and shifts the d-band center, strengthening the adsorption of the critical * CH 2 CHO intermediate and favoring its hydrogenation pathway. Experimentally, the Cu 94 Ge 6 catalyst exhibits an ethanol-to-ethylene ratio of ∼1.8, significantly higher than that of pure Cu (∼0.6). Comprehensive characterization, including in situ ATR-FTIR and quasi in situ XPS, reveals that the Ge-induced electronic modulation enhances the adsorption of COCHO/CH 2 CHO intermediates and promotes the presence of isolated interfacial water, which collectively facilitates ethanol formation. This study presents a viable strategy for regulating C 2+ product selectivity through solid-solution electronic engineering in Cu-based electrocatalysts.
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CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Jiaqi Yang,Kexuan Gao,Yiran Chai,Nigel J.D. Graham,Li-an Hou,Yu Yang
The development of multifunctional catalytic membranes that concurrently enable rapid contaminant degradation, antifouling resistance, and long-term operational stability remains a critical challenge in advanced water treatment. Here, we describe the preparation and testing of a rationally engineered bimetallic CoCu catalyst, anchored onto graphitic carbon nitride (g-C 3 N 4 ) via a glucose-mediated cascade anchoring method (CoCu-CN), and immobilized on to an alumina ceramic membrane (CoCu-CN/M). Atomic-level characterizations revealed the coexistence of surface Co N 4 species and bulk Co Co coordination, and the electron-donating effect of Cu species stabilizes Co in an absolutely reduced state (Co 0 /Co-N 4 ). This bimetallic configuration optimized the peroxymonosulfate (PMS) adsorption configuration ( E ads = −3.05 eV) and facilitated O O oxygen bond cleavage ( I O O = 1.477 Å), thereby accelerating the generation of reactive oxygen species, including SO 4 − , O 2 − , and 1 O 2 . Consequently, the CoCu-CN system achieved complete degradation of a target pollutant carbamazepine (CBZ), with a reaction rate constant (k obs ) of 0.755 min −1 , corresponding to 158.9-fold and 3.23-fold enhancements compared to the monometallic Cu-CN and Co-CN systems, respectively. The CoCu-CN/M membrane demonstrated a high permeability (404.72 LMH/bar), sustained >98% CBZ removal over seven cycles, and exhibited strong antifouling performance. In surface water, the novel membrane maintained >95% degradation efficiency over 72 h of continuous operation, confirming its long-term stability. This study provides atomic-level insights into bimetallic catalytic activation and proposes an effective membrane-based solution for advanced water treatment.
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Biosensors-Basel
·
2026
·Vol. 16
·期 4
·217
·
IF 6.2
Jiang-Shan Chen,Huan Zhu,Tong-Qing Chai,Feng-Qing Yang
Laccase plays an important role in the detection and degradation of phenolic compounds, but it is limited by its cost and stability. In this study, the laccase-like property of copper peptide (GHK-Cu) has been revealed. In terms of enzymatic reaction kinetics, GHK-Cu has aVmaxof 1.735 × 10−4mM·s−1and aKmof 0.061 mM, demonstrating good substrate affinity and excellent catalytic efficiency. Then, a colorimetry was developed for rapid detection of epinephrine (EP) and 2-aminophenol (2-AP). The linear response range of EP is 20–240 μM, with a limit of detection (LOD) of 9.5 μM. The linear response ranges of 2-AP are 14–100 μM (in ultrapure water) and 2–120 μM (in seawater), with LODs of 2.56 μM and 1.65 μM. In addition, combined with a smartphone platform, a cotton-based sensor has been developed for the detection of 2-AP in seawater. The linear response ranges are 0–0.2 mM and 0.2–1 mM, with LOD of 0.033 mM. The structure of GHK-Cu provides a reference for the development of novel laccase mimetic enzymes. The constructed colorimetry offers an option for the rapid detection of phenolic compounds, and the developed cotton-based sensor enabled rapid and portable detection of 2-AP.
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Journal of Water Process Engineering
·
2026
·
IF 6.6
Lei Fang,Yuman Lv,Xinlei Liu,Shijie Wang,Miaomiao Ye
An iron–copper bimetallic biochar catalyst (Fe-Cu@BC) was synthesized to establish a heterogeneous peroxymonosulfate (PMS) activation system aimed at improving the removal of typical organic pollutants in drinking water sources. The physicochemical properties of the catalyst, the catalytic performance, reactive species generation, pollutant degradation pathways, and impacts on dissolved organic matter (DOM) transformation were systematically investigated. Under the optimized conditions, a humic acid (HA) removal efficiency of 66.28% was achieved, which was attributed to the cooperative redox behavior of Fe and Cu species. Radical quenching experiments and electron paramagnetic resonance (EPR) spectroscopy confirmed the simultaneous generation of OH, and 1 O 2 . A quantitative chemical probe-based kinetic analysis clarified the contributions of individual reactive species, and pollutant degradation proceeded through the combined action of OH/-driven radical oxidation and 1 O 2 -mediated selective oxidation. Advanced characterization using three-dimensional excitation-emission matrix (3D-EEM) fluorescence spectroscopy and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) showed that the system altered the molecular composition of DOM in both conventionally treated and advanced-treated effluents, converting high-molecular-weight, reduced components into low-molecular-weight, more oxidized intermediates. This work provides an effective catalytic strategy for the deep treatment of organic-contaminated water using carbon-based bimetallic activators.
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ChemNanoMat
·
2026
·Vol. 12
·期 1
·e202500682
·
IF 2.6
Jingzhou Liu,Yangjun Guo,Xiaojun Zeng
Direct ethanol fuel cells have attracted significant attention due to their high energy density, environmental friendliness, fuel availability, and low toxicity. However, their broader application is constrained by the anode catalyst limitations such as low active site density and low stability caused by the CO* intermediate poisoning. In this work, Pd metallene was synthesized via a hydrothermal method, and transition metal Cu was introduced to obtain PdCu bimetallene supported with porous Cu nanoparticles (NPs). The results indicate that the unique configuration of Cu not only enhances the CO* intermediate tolerance of Pd through electronic interactions but also leverages the intrinsic catalytic activity of Cu, leading to a further improvement in catalytic performance. Therefore, the designed PdCu bimetallene/Cu NPs exhibits a high mass activity of 1.26 A mg Pd −1 for the ethanol electro oxidation reaction, which is 8.4 times that of commercial Pd/C and superior to recently reported Pd-based catalysts. In addition, it maintains a current density of 7.87 mA cm −2 after a 3000 s stability test, demonstrating considerable potential for practical applications. This work provides feasible ideas for the microstructure design and electronic control optimization of metallene in small molecule catalysis.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Ziwen Feng,Di Liu,Jiaqian Kang,Chunfa Liu,Lun Li,Juanjuan Wang,Zhenyu Zhang,Xingyou Li,Weng Fai Ip,Hui Pan
Identifying the true active sites is essential for the development of efficient catalysts for the electrochemical reduction of neutral, dilute nitrate to ammonia, because electrocatalysts often undergo structural transformations during operation conditions, potentially forming new active phases. In this work, copper oxides nanowires with varying Cu valence states were fabricated by in-situ electrochemical reduction of the pre-catalysts (denoted as P-CuO 200, CuO 300, and CuO 400 ) for the electrochemical reduction of neutral, dilute nitrate (5 mM) to ammonia. In-situ and ex-situ characterizations indicated that the surface CuO of these pre-catalysts was partially or fully reduced to Cu 2 O or metallic Cu during activation process. The Cu 2 O species were further transformed into oxide-derived copper (OD-Cu), serving as the true active sites. Among them, the CuO 300 (OD-Cu/Cu 2 O) catalyst with the highest Cu 2 O content, achieved a Faradaic efficiency of 90.8%, a nitrate conversion of 98.3%, and an ammonia yield of 3.3 mg h −1 cm −2 at −0.4 V vs. RHE, outperforming most reported Cu-based materials. Computational results confirmed that OD-Cu facilitated *NO 2 adsorption and protonation, lowering the energy barrier. This study bridges the critical gap between pre-catalyst structures and dynamically formed active sites, providing valuable guidance for the rational design of Cu-based catalysts. Download: Download high-res image (101KB) Download: Download full-size image
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WATER RESEARCH
·
2026
·
IF 12.8
Yifei Peng,Ruya Chen,Zhuoya Fang,Xinyuan Qiu,Qingzhen Wang,Huajun Feng,Jinming Luo,Yijing Xia
Sulfur-mediated electroreduction provides an attractive route for the concurrent decomplexation and recovery of persistent Cu(II)-EDTA; however, the intrinsic activity of sulfur sites remains poorly defined. Here, MoS 2 is employed as a model platform to delineate the role of sulfur functionalities by comparing the metallic 1T and semiconducting 2H phases. Studies reveal that sulfur sites promote a direct two-electron reduction pathway from Cu(II) to Cu(0). In the 1T phase, enhanced covalent Cu-S interactions lower the adsorption and activation barriers of Cu(II)-EDTA, while the elevated density of states at the Fermi level facilitates rapid electron transfer. Combined spectroscopic and theoretical analyses further show that sulfur vacancies and distorted octahedral coordination in 1T-MoS 2 modulate the electronic structure of sulfur sites, thereby promoting Cu extraction and lowering the decomplexation barrier. Consequently, 1T-MoS 2 achieves 99.4% Cu recovery with > 99% EDTA preservation, corresponding to an energy efficiency of 198.80 g kWh -1 (at an initial concentration of 100 mg L -1 ), outperforming 2H-MoS 2 (82.85%, 153.43 g kWh -1 ). This sulfur-mediated pathway concurrently enables stable operation over 30 cycles with high selectivity in complex matrices. Moreover, the strategy extends to other metal-EDTA systems ( e.g. , Pb(II), Cd(II)), highlighting the generality of sulfur-active electrocatalysts for coupling ligand preservation with efficient heavy-metal recovery.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Zhencheng Meng,Lijiao Ding,Yan Sun,Yan Gu,Xiangyang Liu,Linbin Jiang,Kaleem Ahmad,Chunlei Wan,Jia Liang,Shibin Yin
There is a big challenge in simultaneously optimizing the Seebeck coefficient and electrical conductivity to improve thermoelectric performance. Herein, an interfacial engineering strategy is employed to decouple thermoelectric properties in solution-processable MoS 2 /Cu nanocomposites. Specifically, a facile electrochemical method enables the exfoliation of natural molybdenite into high-quality nanosheets and the concurrent in-situ decoration of Cu nanoparticles. Within the MoS 2 /Cu heterostructure, the Cu nanoparticles act as electron donors to regulate the carrier concentration. Crucially, Cu nanoparticles also establish robust conductive bridges between adjacent MoS 2 nanosheets, leading to a highly continuous conductive network with high carrier mobility. Furthermore, the constructed MoS 2 /Cu heterointerfaces introduce strong energy filtering to preferentially scatter low-energy carriers and transport high-energy carriers, effectively improving the Seebeck coefficient. Consequently, the all-inorganic flexible film achieves an outstanding room-temperature power factor of 293.8 μW m −1 K −2 . Furthermore, a MoS 2 /Cu-based flexible thermoelectric generator exhibits highly efficient photo-thermo-electric energy conversion. Under simulated AM 1.5 G (1 sun) illumination, the device establishes a stable temperature difference of approximately 12.3 ℃ and an open-circuit voltage of 9.5 mV. This work highlights the profound efficacy of rational interfacial design in developing high-performance, scalable flexible thermoelectric materials for advanced energy harvesting applications.
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