Nature Catalysis
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2025
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IF 44.6
Liu Qiliang,Yang Wenxing
Non-covalent interactions between the electrocatalyst surface and its electrolyte play a vital role in shaping the microenvironments of electrochemical interfaces. Yet, direct spectroscopic investigation of these interactions and their catalytic effects has remained elusive in electrocatalysis research. Here, using in situ Raman spectroscopy, we resolve a universal change of interfacial water structure at electrified Cu surfaces during alkaline CO reduction reaction. An intricate non-covalent interaction between interfacial water and surface hydroxyl (OH ad ) was recognized through a proposed OH ad ···M + (H 2 O) n complex, with M + representing electrolyte cations. On exposure to catalytic potentials, these non-covalent complexes evolve into local OH − ···M + (H 2 O) n species residing within the electrical double layer and favour CO reduction reaction into acetate over other C 2 products. These results demonstrate the crucial roles of non-covalent interactions in determining the activity of surface reactions, whose existence and rational design may offer opportunities for future fine control of electrocatalysis processes.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Minzhang Li,Man Liang,Wei Wang,Beichi Luo,Yanhong Ji,Longzhang Dong,Lu Guo,Danling Tang,Guangguo Ying,Fuming Chen
Electrochemical desalination offers a promising route to address water scarcity, but current methods often face limitations in salt removal rate and capacity. This study introduces an ultrafast electrocatalytic desalination system that leverages the electrochemical reduction of CO 2 to formate (CO 2 RR) to drive efficient salt removal. The optimized bimetallic Sn/Cu-based polyphthalocyanine (Sn 2 Cu 1 PPc) exhibits exceptional CO 2 RR performance, achieving a peak FE formate of 90.3 % at −1.0 V vs. RHE and a j formate of 84.8 mA cm −2 . In-situ spectroscopic analysis and density functional theory (DFT) calculations reveal that the incorporation of Cu-N 4 units into the Sn-based polyphthalocyanine (SnPPc) promotes CO 2 adsorption and facilitates active hydrogen provision, leading to the observed enhancement in CO 2 RR activity. Using the Sn 2 Cu 1 PPc catalyst, our system achieves a salt removal rate of 1701.3 μg cm −2 min −1 and a formate production rate of 0.79 mmol h −1 cm −2 when treating natural seawater, resulting in potable water with 99.06 % salt removal efficiency. This performance is enabled by a high current density (∼70 mA cm −2 ) during CO 2 RR, which significantly enhances ion transport across the membranes, making this one of the most effective desalination approaches reported. This work demonstrates the potential of coupling CO 2 RR with desalination for sustainable water production and CO 2 mitigation, while also advancing the design of efficient Sn-based electrocatalysts for formate production.
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2025
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IF 4.6
Zhicheng Feng,Yinghua Li,Jianzhang Mai,Weixing Yang
Increasing air pollution poses a serious challenge to human beings. In view of the contradiction between filtration efficiency and pressure drop and the single function of traditional air filtration materials, the present study synthesized Cu-BTC by room temperature solvent method, and then based on the strategy of in-situ modification of Cu-BTC, Cu-BTC/PS-2 composite membranes with low filtration resistance and antibacterial resistance were constructed by modulating the pore structure of polystyrene (PS) fibre membranes. The composite membrane achieved 99.79 % filtration efficiency against PM 0.3 with a pressure drop of only 50.1 Pa. The stability of the composite membrane was significantly better than that of the commercial electret melt-blown filters, and the antimicrobial rate of the composite membrane against E. coli was greater than 99.9 %. This study provides a new material design strategy for the development of a new generation of high-efficiency, low-resistance and antibacterial air filtration materials.
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Journal of Materials Chemistry C
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2025
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IF 5.1
Yunfan Wang,Xuebin Liu,Junhua Huang,Shaodian Yang,Baohua Li,Weiqiang Huang,Zhiping Zeng,Yougen Hu,Xuchun Gui
The prosperous outdoor exercise activities have raised higher performance and multi-functional requirements for the films used in clothing and equipment. However, developing films that have multi-functions such as comfortable, flexible, high-performance electromagnetic interference (EMI) shielding and exceptional electrothermal heating capabilities remains a significant challenge. Herein, a flexible, highly conductive Cu@CNT film was fabricated using the strategy of copper particles bridging conductive nanotubes and polymer fixing conductive networks. The two-step strategy remarkably enhanced the CNT-based conductive network and improved the electrical conductivity of Cu-2.0@CNT film to 22,051 S/m. The resulting Cu@CNT film demonstrated an outstanding average EMI shielding effectiveness (SE) of 57.8 dB across 5-40 GHz, and a remarkable average EMI SE more than 60 dB in 0.2-1.6 THz at the film thickness of 100 μm. The film also exhibited a normalized EMI SE (SE/t) of 578 dB mm-1, which exceeds most reported film materials. Additionally, the Cu@CNT film exhibited impressive electrothermal heating properties, including a high saturated temperature (over 160 ℃ at 3.5 V), a high heating rate (＞ 10 ℃/s at 3.5 V), a controllable thermal response (＜ 15 s) and a stable and uniform heating distribution. Additionally, as a demonstration, it is used as a flexible electromagnetic wave isolation film and flexible heaters. Therefore, the flexible composite film with multiple protective functions proposed in this work provides a competitive material for the next-generation outdoor clothing and equipment applications.
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MATERIALS CHARACTERIZATION
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2025
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IF 5.5
Dang Xu,Pengqi Chen,Kaichao Fu,Changcheng Sang,Ruizhi Chen,Tao Hong,Jigui Cheng,Kai Xu
The inherent metallurgical incompatibility between dissimilar metals such as tungsten (W) and copper (Cu) engenders weak chemical bonding, substantially constraining the attainment of high strength. This constitutes a critical limitation for nuclear fusion applications demanding robust interfacial integrity. To address these limitations, this study introduces a dual interface reinforcement strategy employing a CrCoNi medium entropy alloy (MEA) interlayer and achieving diffusion bonding of oxide diffusion-strengthened tungsten (ODS-W) and Cu through spark plasma sintering (SPS) technology. At the optimized bonding temperature of 1000 °C, the joint achieves a maximum tensile strength of 256.7 ± 8.2 MPa, corresponding to a 171 % enhancement over direct bonding (DB) joint (94.6 ± 5.1 MPa), accompanied by a fracture mode transition from brittle to ductile failure. Multi-scaled microstructure and interface element diffusion behavior analyses reveal that reactive diffusion at the W/MEA interface facilitates the formation of a solution-strengthened matrix associated with an amorphous diffusion layer. Whereas mutual diffusion at the Cu/MEA interface induces multiple phase structures, resulting concurrently in solid solution strengthening and precipitation strengthening, thereby reinforcing the interface bonding. This dual interface reinforcement methodology establishes an effective design strategy for enhancing mechanical properties in immiscible metal systems.
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Frontiers in Microbiology
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2025
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IF 4.5
Weimin Ning,Xuefeng Bao,Lei Jiang,Mei Yang,Tianhao Lei,Maoyan Liu,Yong Liu
Introduction: Tomato bacterial wilt (TBW) is a destructive soil-borne bacterial infection caused by Ralstonia solanacearum. Various nanoparticles have been employed as antibacterial agents to manage TBW via soil application. However, research on the effects of nanoparticles on plant endophytes remains limited.Methods: Here, an analysis of the endophytic bacterial community was performed on healthy and infected tomatoes that were treated with Cu-Ag nanoparticles and thiodiazole-copper via high-throughput 16S rRNA gene amplicon sequencing.Results: The relative abundance levels of beneficial bacteria, including Acidobacteriota, Firmicutes, Actinobacteriota, and Myxococcota, were higher in infected tomato roots treated with Cu-Ag nanoparticles compared with thiodiazole-copper. Functional predictions show that Cu-Ag nanoparticles may affect pyruvate metabolism, oxidative phosphorylation, purine metabolism, carbon metabolism, secondary metabolite production, and the metabolic pathways associated with microbial communities.Discussion: These results could reveal the mechanism by which nanoparticles influence the endophytic microbiomes of plant roots and direct the rational application of nanoparticlesin sustainable agriculture.
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PubMed
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Liangliang Huang,Zhaodong Pan,Mengfei Hu,Rui Wang,Jun Jin,Huanwen Wang,Yansheng Gong
Converting carbon dioxide into fuel via photocatalysis holds immense significance in advancing the cause of sustainable energy generation. In this work, co-doped In 2 O 3 nanosheets with two transition metals, nickel (Ni) and copper (Cu), were successfully prepared using a straightforward ammonia precipitation and calcination technique. Notably, the 10 %Ni-5 %Cu-In 2 O 3 sample exhibited a remarkable CO generation rate of 528.8 μmol g −1 h −1 , which is a substantial 43.63-fold increase compared to the pristine In 2 O 3 (12.1 μmol g −1 h −1 ). Furthermore, the selectivity of the CO product was significantly enhanced from 19.7 % to 69.4 %, marking a significant improvement. The incorporation of Ni and Cu effectively modulated the energy band positions of In 2 O 3 , the synergistic modulation of these bimetals jointly augmented the light absorption of In 2 O 3 across various visible wavelength regions. Additionally, the introduction of Ni and Cu notably prolonged the lifetime of photogenerated carriers and facilitated the spatial separation of electrons and holes. The smaller radius of the doped Ni and Cu ions compared to In may have induced defect formation, leading to a stronger adsorption capacity. Our findings not only underscore the efficacy of transition metal co-doping in photocatalytic CO 2 reduction but also offer valuable insights into the design and fabrication of such catalysts.
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NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Ziru Shao,Shuangfei Zhang,Deyong Wu
Single-atom catalysts (SACs) have been increasingly investigated in Fenton-like reactions for emerging pollutants degradation. Herein, single atom Cu anchored on porous polymeric carbon nitride (SA-Cu/PCN-α) was prepared for peroxymonosulfate (PMS) activation on tetracycline (TC) removal. The as-prepared composites were comprehensively characterized by SEM, TEM, XRD, XPS, and EDS, confirming the successful incorporation of Cu single atoms and the formation of a porous heterostructure. SA-Cu/PCN-α efficiently activated peroxymonosulfate (PMS) to degrade TC, with a pseudo-first-order rate constant k of 0.843 min⁻¹-18.7-fold higher than that of pure PCN (0.045 min⁻¹). Mechanistic studies revealed that Cu single atoms modulated the electronic structure of PCN, promoting charge separation and generating abundant reactive oxygen species (ROS, primarily 1 O 2 and O 2 •-). Static experiments indicated that the degradation efficiency remained above 80% under wide ranges of pH (3-11) and PMS dosage (0.5-2.0 mM) within 10 min. The catalyst retained 80% activity after five cycles, demonstrating its stability.Overall, this work designs Cu SACs with promising implications for wastewater treatment.
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NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Yuli Jing,Yufei Li,Junwen Chen,Kai Cui,Peng Wu,Xiaohong Li
The demand for biodegradable plastics is increasing in line with the growth in environmental protection measures. Consequently, the demand for 1,4-butanediol (BDO), the upstream key raw material for biodegradable plastics, has increased significantly. BDO can be obtained through deep hydrogenation of maleic anhydride (MA). However, due to the complicated network involved in the MA hydrogenation reaction, it is rather difficult to obtain BDO with satisfactory yield via the one-pot deep hydrogenation of MA. In this work, Cu-0.03Fe/SiO2 catalysts were prepared by hydrothermal and co-precipitation methods and applied to the one-pot deep hydrogenation of MA to BDO, affording 92.7-94.4% BDO yield under mild conditions (190 °C, 5 MPa of H2 pressure). This value surpasses the results reported in the literature up to now. Moreover, the Cu-0.03Fe/SiO2 catalyst prepared by a modified hydrothermal method can be reused for at least four times without any distinct loss in activity or selectivity to BDO. A series of techniques were adopted to characterize the Cu-Fe/SiO2 catalysts to gain insights into the structure-performance relationship in the MA hydrogenation to BDO.
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Chemical Engineering Journal Advances
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2025
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IF 7.1
Tianhong Wang,Jiahui Xu,Anhong Cai,Jibo Xiao,Peng Wang,Min Zhao,Xianfeng Huang
Organic phosphonates detected frequently in water bodies pose severely environmental risks, and the cleavage of their C-P bonds to converse orthophosphate (PO 4 3- ) serves as a prerequisite step for achieving deep phosphorus elimination. Although the in situ generation of Cu(III) via Cu(II)/oxidant system for selective phosphonates degradation has been studied, the oxidation efficiency is constrained by sluggish Cu(II)/Cu(I) reduction, especially under acidic conditions. In this study, the introduction of UV irradiation accelerated the Cu(I)/Cu(II)/Cu(III) cycle in Cu(II)/peroxymonosulfate (PMS) process, enabling efficient and selective oxidation of 1,1-diphosphonic acid (HEDP, a typical phosphonate) into PO 4 3- across a wide pH range. UV-driven trace Cu(II)/PMS system can convert 90% of HEDP into PO 4 3- within 10 min at the pH range of 4-10, which was significantly higher than the conversion efficiency of HEDP by UV/PMS, Cu(II)/PMS and UV/Cu(II)/H 2 O 2 processes. The decomposition of HEDP was enhanced with increasing Cu(II) and PMS concentrations. Notably, mechanistic investigation revealed that Cu(III)-induced intramolecular electron transfer was the key contributor during the UV/Cu(II)/PMS-driven decomposition of HEDP into PO 4 3- . The experimental results of competitive ligands clearly suggested that the high selectivity of HEDP oxidation by UV/Cu(II)/PMS was closely related to the complexation of Cu(II) with HEDP. Additionally, although natural organic matter and inorganic anions to some extent affected HEDP degradation, UV-driven trace Cu(II)/PMS system still exhibited satisfactory results in treating HEDP in actual wastewater. This study proposes a strategy for efficient phosphonate removal under varying pH conditions, which provides new insights for practical wastewater treatment applications.
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Bing Xu,Feiyang Huang,Zhihui Luo,Changyan Ran
A compact optical fiber sensor based on a no-core fiber (NCF) segment functionalized with a Cu²⁺-imprinted chitosan/polyvinyl alcohol (CS/PVA) film was developed to enable operando on-line monitoring of Cu²⁺ with high selectivity and sensitivity in complex environmental water matrices. The optimal length of the NCF segment was determined to be 1 cm based on simulation and experimental evaluation, under which the highest sensitivity was achieved. The pseudo-second-order kinetic behavior of Cu²⁺ adsorption was first validated by analyzing the time-dependent shift of the interference valley, providing direct spectral evidence of a chemisorption-driven mechanism. A sensitivity of 0.0768 nm/μM and a detection limit of 0.1245 μM were obtained. A rapid response time of less than 20 s and excellent measurement repeatability, with strong specificity toward the target ion and relative standard deviation below 5 percent over five regeneration cycles, were also demonstrated. The sensor was further applied to spiked water samples from the Yangtze River and tap water. By integrating ion-imprinting technology with an optimized NCF-based fiber structure, a portable, cost-effective, and interference-resistant platform has been established for real-time and on-site monitoring of heavy metal ions in complex aquatic environments.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Haidong Yu,Zhiqiang Hou,Longchao Zhuo,Xijun Liu,Yabin Zhang
Microplastic accumulation in water bodies is posing a serious threat to public health. Their chemical inertness impairs the effectiveness of current micro/nano-material-based remediation strategies. Especially in urban drinking water systems, microplastics constantly released and accumulated together with the complexity of pipeline networks challenges the recyclability and long-term stability of remediation materials and technology. To address this, Cu-single-atom magnetic Janus microparticles (CuMJMs) with flower-like crown morphology are engineered meticulously via a step-by-step strategy involving solvothermal growth and chemical deposition. The resulting CuMJMs feature a distinct Janus architecture composed of BiOI nanosheets and Fe 3 O 4 nanoparticles, thereby delivering synergistic magnetic and photocatalytic functionalities. When subjected to a rotating magnetic field, CuMJMs are able to locomote collectively and recover rapidly in confined microenvironments. The incorporation of atomically dispersed Cu single atom not only enhances the number of active sites, but also promotes the separation and migration of photogenerated charge carriers. Such abilities enable CuMJMs to degrade polyethylene (PE) efficiently, achieving a weight loss rate of 53.7 % beyond previous reports. This performance improvement is ascribed to singlet oxygen generation boosted by the Cu single atoms to facilitate oxidative degradation pathways, as supported by electron paramagnetic resonance and active species trapping test. While used in real water matrices, CuMJMs maintain both catalytic activity and magnetic responsiveness, underscoring their robustness and practical potential. This work establishes a new paradigm to active microplastic remediation, merging atomic-level catalytic precision with collective particle behavior to enable scalable and efficient environmental cleanup.
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