MATERIALS CHARACTERIZATION
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2026
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IF 6.2
Huiling Zhang,Minghui Chen,Shasha Yang,Chen Tang,Fuhui Wang
A novel Co doping strategy is developed for Cu-WS₂ composite using SPS. • Co doping induces in-situ formation of Co 3 W with coherent interfaces. • Coherent interfaces suppress crack initiation and enhance lubricant stability. • CWC-Co exhibits low friction and wear rate due to coherent interfaces. • Synergistic improvement in mechanical and tribological properties is achieved. Overcoming the inherent conflict between mechanical and tribological properties has long been a critical challenge in designing Cu-based self-lubricating composites. This study presents a strategy based on coherent interfaces to resolve this trade-off and achieve superior synergy. Minor Co doping in a Cu-WS₂ composite triggers an in-situ reaction, converting the abrasive decomposition product W into a reinforcing Co 3 W intermetallic phase. This constructs a unique “Cu/Co 3 W/Cu 2 S” multiphase structure where Co 3 W forms coherent interfaces with both the Cu matrix and the Cu 2 S lubricant, exhibiting ultralow lattice mismatches of 3.4% and 2.3%, respectively. These coherent interfaces not only provide strong interfacial bonding strength but also form a semi-encapsulating structure that effectively anchors the lubricant phase. Consequently, the composite achieves a superior combination of a high compressive strength of 655 MPa, bending strength of 448 MPa, with a low friction coefficient of 0.24 and wear rate of 4.20 × 10 −6 mm 3 ·N −1 ·m −1 . This work provides new insights into the innovative design of high-performance metal matrix self-lubricating composites via a coherent-interface strategy that resolves the long-standing property conflict.
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高影响因子
CERAMICS INTERNATIONAL
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2026
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IF 6
Jiawen Wu,Yujie Xie,Fangyi Shen,Tiangong Cheng,Zhongcai Wu,Chujun Wang,Yizhi Liu,Yongzhen Feng,Hui Zheng
Conventional solid-state sintering of M-type hexaferrites requires high temperatures and long durations yet often yields inadequate density and coarse grains, limiting functional performance. This limitation is overcome by hot pressing, which applies uniaxial pressure synergistically with a transient liquid phase. This strategy enables rapid densification at a substantially lower temperature of 975 °C, in contrast to over 1100 °C for conventional methods. The resulting ceramics achieve near theoretical density exceeding 98% (98.03-98.22%), a fine-grained uniform microstructure, and superior structural integrity ( R wp = 2.50-2.83%), properties unattainable by standard sintering. The hot-pressing process also leads to oxygen vacancy reorganization. Consequently, the materials exhibit comprehensively enhanced properties: the optimal composition achieves a high coercivity of 1672.8 Oe, and low dielectric loss (ε″ ≈ 0.93 at 1 MHz) with excellent temperature stability (Δε' as low as 9.23). This work establishes hot pressing as a superior alternative and elucidates the underlying pressure assisted densification and valence modulation mechanism, providing a new design principle for engineering high performance microwave ferrites.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2026
·Vol. 40
·期 5
·e70581
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IF 4.3
Wenjing Song,Zhenhao Xiao,Shuo Yan,Jie Li,Weizuo Li,Haiqun Chen
The chemical fixation of carbon dioxide (CO 2 ) into value-added cyclic carbonates is a promising pathway for carbon utilization; however, developing heterogeneous catalysts with high activity and stability remains a challenge. In this study, a Cu–Mg-MOF-74 precursor was synthesized via a solvothermal method and subsequently transformed into a Cu–Cu 2 O–MgO/C nanocomposite catalyst through a one-step pyrolysis process under N 2 atmosphere at 550°C. The pyrolysis process leads to the collapse of the MOF crystal structure and the formation of highly dispersed Cu–Cu 2 O–MgO nanoparticles embedded in a carbon matrix, while the overall morphology inherited from the MOF precursor remains largely preserved. Detailed characterization (XRD, XPS, TEM, BET, and in situ DRIFTS) reveals that the catalyst possesses a high specific surface area (296.7 m 2 ·g −1 ), abundant Lewis acid sites (Cu, Cu 2 O, and MgO), and surface oxygen-containing groups, which synergistically enhance catalytic performance. Under relatively moderate conditions (90°C, 0.7 MPa, CO 2 , 7 h), the Cu–Cu 2 O–MgO/C catalyst achieved a styrene oxide conversion of 94% with 99% selectivity, significantly outperforming its monometallic and physical mixture counterparts. Furthermore, the catalyst demonstrated excellent substrate versatility and robust recyclability over five consecutive runs without structural collapse. This work provides a facile strategy for fabricating robust MOF-derived carbon-based catalysts for sustainable CO 2 conversion.
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Energy & Environmental Materials
·
2026
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IF 13.8
Xiaozhe Song,Cong Yan,Qinghua Yan,Congzhe Ren,Xin Liu,Ruiyan Zhang,Lei Chen,Chongqing Xu,Zhouyang Long,Wenyu Wang,Mingming Song,Xiaoguo Shi,Hui Wang
Photocatalytic processes driven by visible-light irradiation offer a sustainable means of micropollutants removal from aquatic environments without the addition of reagents. In this study, an enhanced production of photogenerated carriers under visible light has been achieved using acidified graphitic carbon nitride (ag-C 3 N 4 ) modified with atomically dispersed Cu (Cu/ag-C 3 N 4 ), which serves as an efficient photocatalyst for treating antibiotic micropollutants. The optimized Cu/ag-C 3 N 4 system achieved >90% micropollutants removal efficiency within 30 min. A combination of experimental testing and density functional theory analysis has confirmed the formation of an active and stable CuN 3 configuration, generated by the incorporation of atomic Cu species at C vacancies that effectively modulates surface charge redistribution and enables charge separation. The photocatalytic degradation of micropollutants is promoted by photogenerated holes (h + ) in tandem with reactive oxygen species ( · OH $$ \cdotp \mathrm{OH} $$ , O 2 − · $$ {\mathbf{O}}_2^{-}\cdotp $$ , 1 O 2 ), where O 2 − · $$ {\mathrm{O}}_2^{-}\cdotp $$ and 1 O 2 species play dominant roles in the Cu/ag-C 3 N 4 system. The application of ultra-performance liquid chromatography–tandem mass spectrometry analysis has been used to identify possible degradation pathways and establish a synergistic degradation mechanism. This work provides a comprehensive understanding of heteroatom doping that enhances photocatalytic activity, offering a new strategy in designing highly efficient photocatalysts for treating micropolluted water.
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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
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2026
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IF 4.7
Wang Rong,Ma Yirong,Li Wenlin,Zhang Xin,Cheng Jiale,Bai Hao,Zheng Jiajun,Yu Feng,Fan Binbin,Li Ruifeng
Cu/zeolite catalysts have attracted considerable attention for cold-start applications; however, their efficiency in propylene adsorption remains limited. To address this challenge, Cu/ZSM-5 catalysts with enhanced metal-support interactions were successfully constructed via a seed-assisted, template-mediated synthesis method, leading to improved propylene capture and oxidation efficiency. The catalysts were systematically characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR), N 2 adsorption-desorption, scanning electron microscope (SEM), transmission electron microscope (TEM), NH 3 -TPD, X-ray photoelectron spectroscope (XPS), and in situ infrared spectroscopy to investigate the influence of acid site density and metal-support interactions on propylene adsorption behavior. The results demonstrated that Cu@ZSM-5 catalysts synthesized with different structure-directing agents exhibited distinct acidity profiles and varying strengths of metal-support interaction. Among them, the Cu@ZSM-5-130 sample prepared using the TPAOH template showed a high specific surface area (474 m 2 /g) and a more optimal acidity balance. It was found that an excessive density of strong acid sites can be detrimental to propylene adsorption and oxidation. The intimately associated Cu species within the zeolite matrix facilitated selective adsorption of hydrocarbons, particularly propylene. In situ infrared spectroscopy further revealed a temperature-dependent oxidation pathway of propylene over the Cu@ZSM-5-TPAOH-130 catalyst, starting with epoxide formation at low temperatures, progressing to partial oxidation products ( e.g. , acrolein) at intermediate temperatures, and ultimately yielding complete oxidation products, such as CO 2 and H 2 O at higher temperatures. The alternative text for this image may have been generated using AI.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
·
IF 9.6
Jingjing Wang,Zhihui Wen,Xinjie Wei,Jiancheng Wang,Junjie Liao,Liping Chang,Kechang Xie
Copper-based sorbents for adsorption desulfurization have attracted significant interest owing to their potential for high sulfur adsorption capacities. However, their practical application has been severely impeded by the ambiguous active-site structures and, more critically, a drastic loss of capacity in the presence of competing aromatic compounds. This performance bottleneck stems from the lack of electronic specificity in conventional Cu sites to differentiate thiophene from benzene, which leads to unselective adsorption. Herein, we address these challenges by constructing a well-defined single-atom sorbent through a one-pot seeding strategy that precisely anchors Cu 1 O pairs in the supercages of hollow Y zeolite, forming a stable Cu 1 -O 4 -Al 2 bridging configuration. Desulfurization experiments performed using pure benzene as the solvent show that the hollow Cu@Y zeolite achieved a record-breaking sulfur breakthrough capacity of 0.99 mmol/g with 12-fold improvement over conventional Cu Y zeolite, representing state-of-the-art performance among reported copper-based sorbents even under such strongly competitive conditions. After five regeneration cycles, the sorbent still maintained a high adsorption capacity. This Cu 1 -O 4 -Al 2 structure induces a tailored electronic environment where the Cu center becomes highly electron-deficient due to significant charge transfer (1.71|e|) to framework oxygen atoms. As a result, the Cu 1 -O 4 site strongly adsorbs thiophene (−106.8 kJ/mol) via σ-coordination in an η 1 (C) mode (Cu C distance: 2.17 Å), further stabilized by a secondary interaction between the sulfur atom and a framework oxygen (S O distance: 3.02 Å), resulting in a unique “bidentate anchoring” adsorption configuration. Crucially, the highly electron-deficient nature of the Cu centers prevents effective π-complexation with benzene due to insufficient back-donation capability, thereby suppressing competitive aromatic adsorption through electronic repulsion. In situ Fourier transform infrared (FT-IR) spectroscopy directly captured the unique vibrational fingerprint of thiophene undergoing σ-coordination at the Cu 1 -O 4 sites, alongside evidence of the promotion of oligomerization and C 4 species formation. This work not only deciphers the nature of high-performance Cu sites but also establishes an electronic-structure-centered design principle for sorbents targeting deep desulfurization in aromatic-rich environments.
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Journal of CO2 Utilization
·
2026
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IF 8.6
Shuai Hu,Xiaoxuan Zhu,Yan Li,Yu Zhang,Bin Du,Jianjun Su,Yan Zhu,Zhenfeng Wang,Yanming Wang,Gewen Yu,Jian Ding,Yuqing Wang,Xiaohui Guo
Take into consideration the backdrop of global energy crisis and rising carbon dioxide concentration in the atmosphere, to research and develop efficient catalysts for converting CO 2 into sustainable energy is crucial. Based on this background, this study employed the complexation combustion method to prepare CuNi nanoclusters (NCs) with varying atomic ratios and applied in catalytic hydrogenation of CO 2 to CO or methanol. Through systematic characterization techniques such as XRD, SEM, BET, in-situ XPS, EPR, and chemisorption, the crystal phase structure, morphological features, physico-chemical properties, and catalytic performance of the as-obtained catalysts were thoroughly analyzed. The results of activity measurements demonstrate that the electronic synergy between CuNi bimetals exerts a positive catalytic effect on CO 2 hydrogenation to methanol. Notably, the Cu 1 Ni 1 catalyst achieved the striking methanol selectivity (98.5%) while maintaining a higher conversion of CO 2 (11.4%). Specifically, thanks to the employment of acetic acid complexation together with the isolation and stabilization effects of Ni species, a considerable amount of metastable Cu + is detected in the obtained catalyst as evidenced by XRD and in-situ XPS, which synergistically interacts with Cu 0 and facilitates the redox cycling of Cu active sites for CO 2 hydrogenation. Besides, the CO 2 -TPD and EPR show that a higher concentration of oxygen defects and the resulting large number of basic sites with moderate strength greatly facilitate the adsorption of CO 2 and hydrogenation to methanol; however, the excessively sites with strong basicity which present on the surface of Cu 0 Ni 1 generate the strong adsorption of CO 2 molecules, making the reaction route turned to the reverse water gas shift which is conducive to the hydrogenation of CO 2 to CO. Thus, the bond strength between CO 2 and basic site could alternate the mechanism of catalytic reaction on supported copper based catalysts.
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ACS Applied Materials & Interfaces
·
2026
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IF 7.8
Lidong Wang,Yongyan Sun,Yuting Sun,Changbin Zhang,Guixi Wang,Junnan He,Yan Zhao,Ming Li
Photodynamic therapy (PDT) holds promise for oral squamous cell carcinoma (OSCC) but is limited by the tumor microenvironment─specifically hypoxia, elevated glutathione (GSH), and the lack of tumor-selective photosensitizer activation. To overcome these barriers, we developed a GSH-activated nanoplatform Cu-TCPP(Zn)/Ti3C2Tx for fluorescence imaging-guided synergistic photodynamic/chemodynamic therapy (PDT/CDT). The system is constructed from two-dimensional Cu-TCPP(Zn) MOF nanosheets, where Cu2+ and Zn2+ completely quench the fluorescence and PDT activity of TCPP and surface-anchored Ti3C2Tx MXene. In the TME, overexpressed GSH reduces Cu2+ to Cu+ and abstracts Zn from the Zn–N4 complex, triggering nanocomposite disintegration to restore fluorescence, activate PDT, and simultaneously deplete GSH to reduce antioxidant defense. The resulting Cu+ catalyzes a Fenton-like reaction with endogenous H2O2 to generate •OH for CDT, while Ti3C2Tx acts as a catalase-like nanozyme, decomposing H2O2 into O2 to alleviate hypoxia, promote charge transfer, improve the utilization efficiency of photogenerated electrons, and enhance PDT efficacy. In vitro, the platform showed excellent biocompatibility and GSH-responsive activation, inducing 41.21% apoptosis in CAL-27 cells under 660 nm laser irradiation, significantly outperforming controls. In vivo, the nanocomposite accumulated efficiently in tumors via the EPR effect, suppressed tumor growth, and exhibited no observable systemic toxicity. This work provides a TME-responsive theranostic platform that integrates tumor-specific activation, GSH depletion, hypoxia alleviation, and enhanced ROS generation for precise and effective OSCC treatment.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Mabrook S. Amer,Prabhakarn Arunachalam,Ahmad A. Alsaleh,Zeyad A. Almutairi,Hazim M. Al-Otaibi,Abdullah Al-Mayouf
Developing efficient and selective electrocatalysts for electrochemical ammonia oxidation (eAOR), coupled with proper electrochemical processes, offers promising opportunities for recycling ammonia into valuable fertilizers and as a potential technology for energy production and storage applications. Here, we introduce Ni(OH) 2 /Ni x Cu y B@NF electrodes, developed by in-situ solvothermal methods, as highly effective and durable electrocatalytic materials. The eAOR features of Ni(OH) 2 /Ni x Cu y B@NF displays the smallest overpotential of 130 mV (at 50 mA cm −2 ) and attained a enhanced current response of 178.3 mA cm −2 (@ 1.60 V RHE ). As shown by the electrocatalytic features and stability of Ni(OH) 2 /Ni x Cu y B@NF films at 1.43 V for an eAOR of 50 mA cm −2 , the HER current was 100 mA cm −2 at 99 mV, the smallest value among all Ni-based electrocatalysts studied. Gas chromatography (GC) experiments show that ammonia produces N 2 in the electrochemical cell at different times. In the eAOR-HER system, impressive electrocatalytic performance has been observed with higher FE of N 2 and H 2 was 47 % and 27.1 %. A two-electrode arrangement of Ni(OH) 2 /Ni x Cu y B@NF needs only 1.53 V to split ammonia to acquire 10 mA cm −2 , which is lower than any other electrode material. Based on the results, Ni(OH) 2 /Ni x Cu y B@NF might be a suitable system for wastewaters bearing high levels of ammonia, generating more sustainable hydrogen from wastewater, and recycling fertilizers.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
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IF 9.6
Qing Zhou,Shunshun Jia,Qimeng Wang,Fanxiang Gu,Haifeng Bian,Ge Xue,Haoran Wang,Yujie Ma,Jian Gu,Jun Ma,Xiangkang Meng
The practical application of aqueous Zn-ion batteries (AZIBs) is hindered by Zn dendrites, hydrogen evolution reaction (HER), and corrosion/passivation of Zn anodes. Herein, a Zn-philic Cu layer is first fabricated on Zn anodes, which not only physically covers scratches and fills defects on Zn anodes but also utilizes the high zincophilicity of Cu to guide uniform Zn deposition. A densely packed Zn 5 (OH) 8 Cl 2 ·H 2 O nanosheets (nZCH) layer is formed on Cu layer, which not only selectively adsorbs H 2 O and repels SO 4 2− to inhibit corrosion/passivation but also prevents electron leakage during Zn deposition in inner Cu layer due to the insulating nature to electrons, thereby suppressing HER. As a result, nZCH-Cu@Zn||nZCH-Cu@Zn symmetric batteries achieve ultra-stable cycling for over 4800 h at 1 mA cm −2 and 3600 h at 5 mA cm −2 . It should be emphasized that both Cu layer and nZCH layer constructed in this paper are obtained through a simple and low-cost one-step in-situ configuration strategy. The three-dimensional structure of nZCH facilitates electrolyte diffusion, ensuring uniform distribution of Zn 2+ concentration and electric field. Moreover, nZCH is a genuine passivation layer with a dense structure. Its presence inhibits the formation of loose pseudo-passivation Zn 4 SO 4 (OH) 6 ·xH 2 O layer, solving the long-standing passivation problem on Zn anodes. The top hydrophilic nZCH layer facilitates Zn 2+ de-solvation, repels SO 4 2− , and adsorbs H 2 O to suppress side reactions, while the bottom Zn-philic Cu layer provides abundant nucleation sites for dendrite-free Zn deposition. Download: Download high-res image (192KB) Download: Download full-size image
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yanfang Zhu,Dongdong Kang,Zhiyuan Huang,Guiyang Xu
Photocatalytic H 2 production and pollutant degradation using solar-driven processes are promising approaches for sustainable energy conversion. However, the reaction efficiency is inadequate due to rapid carrier (e -/ h + ) recombination and poor catalyst stability. In this work, we report a novel heterostructure comprising iridium-modified Cu-MOF coupled with sulfur-doped HfO 2 (S-HfO 2 ), termed as Ir-Cu-MOF/S-HfO 2 composite, to investigate photocatalytic H 2 production and bisphenol-A (BPA) degradation. Advanced characterization studies, such as X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM & TEM), X-ray photoelectron spectroscopy (XPS), electrochemical impedance spectroscopy (EIS), and electron spin resonance (ESR), were used to explicate the structural, morphological, electronic, and charge transfer performances of the Ir-Cu-MOF/S-HfO 2 composite. Under LED-light irradiation, the Ir-Cu-MOF/S-HfO 2 photocatalyst displays a H 2 evolution rate of 12.98 mmol g -1 h -1 using triethanolamine (TEOA) as a sacrificial agent. Simultaneously, it achieves 96% degradation of bisphenol-A (BPA) within 120 min, with a rate constant of 0.018 min -1 , representing superior bifunctional photocatalytic activities. Characteristics studies suggest that the synergistic interaction between Ir-infused Cu-MOF active centres and defect-rich S-HfO 2 facilitates the efficient separation and migration of photogenerated charge carriers. Moreover, the Ir-Cu-MOF/S-HfO 2 photocatalyst exhibits good stability and reusability over prolonged cycles. This study provides valuable insights into the clear design of noble metal-modified MOF-based heterostructures and highlights their potential for integrated solar-driven hydrogen production and environmental pollutant abatement.
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高影响因子
ACS Catalysis
·
2026
·
IF 13.6
Kaixuan Chen,Xintian Luo,Hansheng Wang,Shangzhi Xie,Huibing He,Jing Xu
Low ethylene glycol (EG) selectivity and insufficient stability in the complex multistep hydrogenation of dimethyl oxalate (DMO) have invariably stimulated a research focus of copper-based catalysts. Conventional catalyst development heavily relies on extensive trial-and-error experimentation and serendipitous discovery. In order to efficiently predict high-performance catalysts, this study constructs a machine learning (ML) model based on the K-means clustering algorithm to successfully screen out the potential Ga promoter. Experimental results demonstrate that a 0.5Ga-Cu/SiO2 catalyst achieves nearly 100% DMO conversion and 98.59% EG selectivity at a relatively low temperature (180 °C) and high weight hourly space velocity (1.5 h−1), while maintaining continuous operational stability for over 240 h. Physical characterizations reveal that Ga2O3 promotes the dispersion of copper species and reduces local electron density, thereby modulating the balance between Cu0 and Cu+ dual active sites. Moreover, density functional theory calculations indicate that the interfacial interaction between Ga2O3 and copper species enhances the substrate dissociation adsorption. This study validates the utility of ML in screening advanced copper-based catalysts for efficient DMO hydrogenation to EG and provides a valuable framework for the future catalyst design in the thermocatalytic field.
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