CERAMICS INTERNATIONAL
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2026
·
IF 5.6
Dengji Zhu,Xinmeng Wu,Haiwei Han,Yiming Zhang,Jiawei Wu,Yi Ding,Lihua Yu,Junhua Xu,Bin Zuo
The investigation of friction response behavior and underlying mechanisms of modified implants in a simulated human tissue fluid environment is critical for assessing their in vivo service life. This study presents an in vitro evaluation of implant coatings through integrated experimental and simulation approaches. A series of ZrBN-Cu composite films were fabricated using non-equilibrium magnetron sputtering, and the composition, microstructure, mechanical properties, chemical stability, and tribological behavior in bovine serum albumin (BSA) solution were systematically characterized. The results reveal that the ZrBN-Cu films comprise fcc-ZrN, hcp-ZrB 2 , and fcc-Cu. With increasing Cu content, the hardness and elastic modulus initially increase and subsequently decrease, reaching peak values of 25.45 GPa and 274.99 GPa, respectively, at a Cu concentration of 1.1 at.%. Moreover, the ZrBN-Cu film with 1.1 at.% Cu demonstrates optimal electrochemical stability, exhibiting a corrosion current density of 1.6×10 -6 A/cm 2 and a corrosion potential of -0.04 V, indicative of superior chemical resistance. In BSA solution, the coefficient of friction gradually decreases and stabilizes at 0.11. The wear rate initially declines and then slightly increases with Cu content, reaching a minimum value of 2.1×10 -8 mm 3 N -1 m -1 at 1.1 at.% Cu. The lubrication and wear mechanisms of the ZrBN-Cu/BSA system were analyzed from lubrication state, adsorption behavior, and tribochemical reactions. The findings suggest that: (1)The ZrBN-Cu/BSA system operates under boundary lubrication conditions. (2)Cu incorporation facilitates the formation of a stable physical and chemical adsorption layer on the surface, while B enhances the structural integrity of this layer. (3)Cu exerts a catalytic effect, promoting the degradation of BSA molecules during friction and resulting in the formation of high-molecular-weight carbon-based compounds with lubricating properties.
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Journal of Materials Chemistry A
·
2026
·
IF 9.5
Junzhou Men,Zeyu Wang,Chen Luo,Ai Zhang,Hui Xian,Tao Jiang,Yating Wang
To address the urgent demand for efficient solar-to-hydrogen conversion, a novel Cu-doped 3D ordered macroporous (3DOM) ZIF-8 photocatalyst was fabricated via polystyrene sphere templating coupled with a dual-solvent method. Systematic characterization confirmed the preservation of the ZIF-8 crystalline structure after ∼2 at% Cu2+ incorporation. The 3DOM framework amplified light absorption via slow-light effects, while Cu2+ doping narrowed the band gap and further intensified the slow-light phenomenon. The optimized Cu-3D-ZIF-325 exhibited a photocatalytic hydrogen evolution rate of 2233.2 µmol g−1 h−1, which is 29 times higher than that of pristine ZIF-8. This performance enhancement originated from synergistic mechanisms: EIS measurements revealed that Cu2+ sites improved charge separation, and the optimized band structure facilitated carrier transport; DFT calculations further verified that Cu2+ optimized the adsorption/dissociation of water and elevated the conduction band potential, strengthening the reductive driving force for H2 production. This work establishes a viable dual-modification strategy for high-efficiency MOF-based photocatalysts.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9
Jiangyuan Qiu,Ruxin Liu,Tao Yu,Wenxuan Li,Lingyuan Wu,Weiming Zhong,Ting Wan,Rui Guo,Zaiyin Huang,Xuanwen Liu
This study addresses the technical challenges of traditional processes for precious metal recovery from electronic waste, including high energy consumption, severe pollution, and the use of highly corrosive reagents. We innovatively propose a green recovery strategy based on piezoelectric catalysis. By combining the compositional characteristics of electronic waste (Cu > 80 wt%, Au 0.1–0.5 wt%) with the hard-soft acid-base (HSAB) theory, we developed a BOC-NH₄Cl-CH₃CN-H₂O catalytic system. This system achieves efficient dissolution of copper and gold (1334 mg h −1 ·g-cat −1 and 2.7 mg h −1 ·g-cat −1 , respectively) through an oxidation-coordination mechanism, with dissolution rates reaching 99.8% and 95.5% in simulated systems and enrichment purity exceeding 99%. Based on the experimental data, it is proposed that under piezocatalysis, acetonitrile is oxidized to acetamide, which then synergistically coordinates with NH₃/Cl − to form stable coordination products (with binding energies of E_Cu = −4.034 eV and E_Au = −2.993 eV, respectively). This process may serve as a key mechanism responsible for the significant enhancement of metal dissolution. Due to the lower oxidation potential of Cu ( E° = 0.34 V) compared to Au ( E° = 1.5 V), the system exhibits a “high‑copper, low-gold” selective dissolution characteristic that aligns well with waste composition. This technology provides an efficient and environmentally friendly solution for metal recovery from electronic waste.
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NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.6
Haitao Wang,Min Xie,Yubin Liu,Haitao Duan,Qinglin Liu,Shengwei He,Shuxiang Lyu
In this study, a composite material denoted as Cu-BDC@AC with small particle size was synthesized by incorporating Cu-BDC with activated carbon (AC). This integration resulted in an increased specific surface area and enhanced adsorptive desulfurization performance. The maximum static sulfur capacity for n-propanethiol (nP) in styrene system was 50.7 mg S/g, while the desulfurization rate for pyrolysis gasoline was approximately 50%. The Cu-BDC@AC material was characterized using scanning electron microscopy (SEM), N2 adsorption-desorption isotherms and spectroscopy (XRD, FTIR and XPS) analyses. The adsorption process follows the pseudo-second-order kinetic, and is a chemisorption process. The adsorption behavior of nP on Cu-BDC further analyzed using an internal diffusion model. A possible mechanism for the adsorption of nP on Cu-BDC@AC is proposed: the formation of ligand bonds between Cu and S as the main role of chemisorption. This work offers a promising strategy for the removal of small-molecular sulfur compounds from unsaturated oils.
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RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
·
2026
·
IF 1.5
Gao R.,Hong R. Y.,Hong H. L.,Liang C. Z.,Jiao Z. Z.,Jin S. W.,Li Z. Z.,Wang D. Q.
Three novel isonicotinamide(inic)-based Cu(II) complexes [Cu(inic) 2 (cbba) 2 ] (inic is isonicotinamide, cbba is 2-( p -chlorobenzoyl)benzoate) ( 1 ), [Cu(inic) 2 (mpa) 2 ] (mpa is 4-methoxyphenylacetate) ( 2 ), and [Cu(inic) 2 (tmca) 2 (H 2 O)] 2 ⋅CH 2 Cl 2 (tmca is 3,4,5-trimethoxycinnamate) ( 3 ) have been acquired by the injection of the carboxylates as the auxiliary ligands and characterized by using the X-ray crystallography, together with the elemental analysis, FT-IR, and thermogravimetric analysis techniques. In all the complexes, the Cu(II) ions are coordinated through two monodentate carboxylates to the two anions, forming approximately a plane. Each Cu(II) ion is then coordinated with the pyridine N atom of the inic molecules that behave as the monodentate ligands. The amide groups of the inic create the H-bonds with other amide and carboxylate residues, engendering a molecular crystal with the three-dimensional H-bond arrangement of the mononuclear units. The X-ray diffraction studies displayed that these complexes possessed mononuclear structures with the square planar/square-pyramidal coordination modes at the Cu(II) ions. The pair of the complementary N–H···O H-bonds between the amides of the inic molecules were set up in compounds 1 and 3 , making the dimer motif of inic, while there found the catemer motif of the inic molecules through using the intermolecular single N–H···O H-bond between the CONH 2 in 2 . The CH–O contacts derived from the py CH of the inic molecules were built in all the compounds. The intricate intra- and intermolecular classical H-bonds, O–C, O–O, Cl–Cl, CH 3 –CH/CH–CH, CH 3 –C, CH–O/CH 2 –O/CH 3 –O, CH–Cl/CH 3 –Cl, C–π, O–π, CH–π, and π–π associates are elucidated by using the X-ray crystallographic studies, driving the isolated complexes into the high-dimensional ordered supramolecular structures.
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APPLIED CATALYSIS A-GENERAL
·
2026
·
IF 4.8
Siyu Yi,Guobin Zhou,Yi Wang,Mengxia Ji,Jinman Yang,Yi Zhang,Pengcheng Yan,Zhao Mo,Zhaolong Wang,Junjie Yuan,Hui Xu,Xiaojie She
Electrocatalytic CO 2 methanation is promising for carbon neutrality but hindered by complex multi-electron transfer process, thereby obtaining low product selectivity. Herein, we report a copper single atom catalyst anchored on nitrogen doped carbon nanotubes (Cu-N-CNTs) for efficient electrocatalytic CO 2 methanation. By synergistically regulating the precursor, Cu-N 4 active sites are precisely constructed at the atomic scale, effectively suppressing copper aggregation. In situ characterization indicates that the catalyst forms a moderate local alkaline microenvironment during the reaction, suppressing C-C coupling side reactions and promoting methane pathways. In the flow cell, Cu-N-CNTs achieve a FE CH4 of 59.2% and a partial current density of 168.7 mA cm −2 at −1.577 V vs. RHE, and operated stably for 10 h. Moreover, Cu-N-CNTs exhibit remarkable methane selectivity in membrane-electrode assembly (MEA) systems employing both alkaline and pure-water electrolytes. A scaled-up MEA prototype further verifies the outstanding operational stability of Cu-N-CNTs under practical conditions. These results collectively underscore the substantial potential of Cu-N-CNTs for industrially relevant electrocatalytic CO 2 methanation.
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WATER AIR AND SOIL POLLUTION
·
2026
·Vol. 237
·期 11
·676
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IF 3.5
Deng Feng,Zhang Lu,He Yuqi,Wang Yun
Iron-copper/carbon aerogel (Fe–Cu/CA) electrodes were prepared via N₂ carbonization and CO₂ high-temperature activation. Structural characterization indicated that CO₂ activation significantly increased the cathode’s porosity and specific surface area, enhancing the exposure of catalytic active sites. The CO₂-activated Fe–Cu/CA electrodes were used as cathodes in an electro-Fenton (EF) system for treating chemical oxygen demand (COD) and adsorbable organic halide (AOX) in actual printing and dyeing wastewater (PDW). The results showed effective COD removal over a wide pH range (3–8); under optimal conditions (pH = 3, current density 7 mA/cm 2 , aeration rate 0.5 L/min), the COD and AOX removal rates reached 73.0% and 65.5% respectively after 60 min, with a maximum H₂O₂ concentration of 32 mg/L. Fe and Cu served as efficient Fenton catalysts to promote COD degradation. Additionally, the cathode exhibited good catalytic stability, with COD removal rate slightly decreasing from 73.0% to 69.1% after five reuse cycles. This material provides a feasible approach for actual PDW treatment by EF process.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Jiamin Wang,Fei Liu,Yanqiu Shi,Yizhou Wang,Shangyan Zhou,Xiaodan Wang
CuAl 2 O 4 -derived ZnO/Cu catalyst is constructed via reduction-exsolution and H 2 -SMSI • Precise prereduction control creates rich and active ZnO x /Cu interfacial sites • ZnO x /Cu interface promotes H 2 activation, m-HCOO ⁎ pathway and suppresses RWGS • Superior methanol performance originates from enhanced ZnO x /Cu interfacial synergy • The STY of methanol reaches to 525.8 mg CH₃OH ·h −1 ·g cat −1 and selectivity is close to 75.8% Constructing highly exposed Cu/ZnO interfaces represents a crucial strategy for achieving efficient CO 2 hydrogenation to methanol. In this work, CuAl 2 O 4 spinel was employed as the precursor, and an inverse catalyst (oxide/metal, which is a reverse structure to the traditional metal/oxide catalyst) featuring abundant ZnO x /Cu interfacial sites was obtained by combining reduction-exsolution with a hydrogen-induced strong metal–support interaction (SMSI) strategy. Under the reaction conditions of 240 °C and 3.0 MPa, the optimal ZnO/CuAl 2 O 4 –500 exhibits significantly higher methanol selectivity (75.8%) and space-time yield (525.8 mg CH₃OH ·h −1 ·g cat −1 ) compared to the ZnO/CuAl 2 O 4 with negligible ZnO x /Cu interfacial sites. Multiple characterizations combined with theoretical calculations reveal that the strong electronic interaction at the ZnO x /Cu interfacial sites induces the formation of Cu + species and oxygen vacancy (O v )-rich ZnO x . This markedly enhances H 2 activation and spillover, promotes the generation of highly active monodentate formate (m-HCOO ⁎ ) intermediates, and lowers the energy barrier for methanol formation. Concurrently, the interface suppresses the reverse water–gas shift (RWGS) pathway on Cu 0 sites, thereby improving methanol selectivity. This study presents a controllable synthetic strategy for constructing high-performance inverse ZnO x /Cu interfacial sites, providing new insights for the development of efficient catalysts for CO₂ hydrogenation to methanol. In this work, CuAl 2 O 4 spinel was employed as the precursor, and an inverse catalyst featuring abundant ZnO x /Cu interfacial sites was obtained by combining reduction-exsolution with a hydrogen-induced strong metal–support interaction (SMSI) strategy. Under the reaction conditions of 240 °C and 3.0 MPa, the optimal ZnO/CuAl 2 O 4 –500 exhibits significantly higher methanol selectivity (75.8%) and space-time yield (525.8 mg CH₃OH ·h −1 ·g cat −1 ) compared to the ZnO/CuAl 2 O 4 with negligible ZnO x /Cu interfacial sites. Multiple characterizations combined with theoretical calculations reveal that the strong electronic interaction at the ZnO x /Cu interfacial sites induces the formation of Cu + species and oxygen vacancy (Oᵥ)-rich ZnO x . This markedly enhances H 2 activation and spillover, promotes the generation of highly active monodentate formate (m-HCOO ⁎ ) intermediates, and lowers the energy barrier for methanol formation. Concurrently, the interface suppresses the reverse water–gas shift (RWGS) pathway on Cu 0 sites, thereby improving methanol selectivity. Download: Download high-res image (127KB) Download: Download full-size image
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Nanomaterials
·
2026
·Vol. 16
·期 10
·571
·
IF 4.8
Ruo-Zhou Li,Mengchen Xu,Yiming Zhong,Yuhong Xia,Dongyang Lu,Zehua Wang,Ke Qu,Ying Yu,Jing Yan
The expansion of paper-based and wearable microwave electronics demands conductors that are highly conductive, finely patterned, mechanically robust, and compatible with low-cost, biodegradable substrates. This study reports a laser-scribing strategy for high-performance copper–liquid metal (Cu–LM) conductors on paper based on laser sintering of Cu–LM composite particles, with an auxiliary adhesive transfer step to facilitate integration on flexible substrates. Laser-induced reactive sintering creates a network wherein sintered liquid metal and CuGa2acts as a conductive bridge, interconnecting the dispersed Cu particles. This provides efficient electron transport pathways, achieving a high conductivity of 4.2 × 106S/m under optimal laser conditions, surpassing that of pure eutectic gallium–indium (EGaIn) alloys. The self-healing nature of LM enables exceptional mechanical flexibility and stable electrical performance under severe deformation. The utility of this platform is demonstrated by a miniaturized microwave liquid level sensor that provides multi-parameter water-level detection and sensor calibration. These results establish laser-scribed Cu–LM on paper as a low-cost and disposable option for high-performance microwave sensors and flexible wireless electronics.
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PubMed
高影响因子
ACS Applied Nano Materials
·
2026
·
IF 5.8
Huaqi Chai,Junsheng Wang,Yuanhai Lin,Yuncong Wang,Bingjie Chai,Mingming Xu
The fabrication of surface-enhanced Raman scattering (SERS) substrates with high hotspot density and superior sensitivity is a critical bottleneck limiting their practical applications. In this paper, a three-dimensional (3D) SERS substrate based on high-density Cu@Ag bimetallic heterostructured nanoflowers (Cu@Ag NF) was constructed using citric acid etching-assisted electrochemical deposition (ED) technology and high-vacuum electron beam evaporation coating technology, which provides an efficient and low-cost preparation process for the SERS substrate. The performance of a Cu@Ag 3D-SERS substrate was evaluated systematically using crystal violet (CV) as the probe molecule. This substrate exhibited a limit of detection (LOD) as low as 10–12 M (pM), and the signal intensities at its five characteristic peaks were more than 10 times higher than those of the Ag@ITO substrate, indicating its high sensitivity. In addition, the substrate demonstrated excellent uniformity (relative standard deviation (RSDs) < 11% for 15 randomly tested points) and long-term stability (no significant signal attenuation after 2 weeks of storage at room temperature). This work provides valuable guidance for the facile, scalable, and low-cost fabrication of high-performance SERS substrates, and presents a reliable strategy for the detection of trace organic pollutants in practical scenarios.
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ACS Omega
·
2026
·
IF 5.2
Zai Dong,Xichang Wu,Tianhua Yu,Chaochan Li,Heng Zhang,Jie Wang,Armin Rezayan,Anping Wang
This study aims to improve the removal efficiency of heavy metal ions from wastewater. We utilized agricultural residues derived from Camellia oleifera shell and combined them with zeolitic imidazolate frameworks (ZIFs) precursors for synergistic modification. By introducing active components such as Zn and Co in situ using chemical reagents, followed by pyrolysis, co-carbonization, and KOH activation treatments, we prepared nine types of functionalized biochar (BCX-T). Their structural characteristics and adsorption performance toward Cu(II) and Cd(II) were systematically characterized. The results showed that BC8-500 exhibited an adsorption capacity of 31.61 mg/g for Cu(II), a 2.1-fold increase compared to unmodified biochar; BC9-500 exhibited an adsorption capacity of 111.43 mg/g for Cd(II), a 6.4-fold increase. The adsorption process was primarily driven by chemical adsorption and multilayer adsorption. The removal of Cu(II) by BC8-500 was mainly achieved through complexation, whereas the removal of Cd(II) by BC9-500 was primarily achieved through CdCO3 precipitation. This study provides a theoretical basis for the effective utilization of agricultural and forestry residues, as well as for the mitigation and management of environmental pollution.
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PubMed
高影响因子
Inorganics
·
2026
·Vol. 14
·期 9
·237
·
IF 3.4
Qi Guo,Pan Hou,Jingjie Cao,Hui Liu,Ge Tian
The selective photocatalytic reduction of O2to H2O2is an attractive route for sustainable H2O2synthesis, yet its efficiency is often limited by the sluggish charge separation and insufficient selectivity of the two-electron oxygen reduction reaction. Here, we develop a conductive 2D Cu3(HHTP)2metal–organic framework (MOF) in which Cu2+sites serve as dynamic redox centers to regulate interfacial electron transfer and O2activation. Upon photoexcitation, photogenerated electrons are preferentially transferred to Cu centers, inducing reversible reconstruction of the local Cu coordination environment. Benefiting from the extended π-conjugated framework and strong interlayer electronic coupling, the accumulated electrons can delocalize over the 2D sheets, facilitating charge separation and suppressing electron–hole recombination. Spectroscopic and theoretical investigations further reveal that the dynamically reconstructed Cu sites promote O2adsorption and activation through electron donation from Cu d orbitals to O2antibonding states, thereby stabilizing the O2−intermediate and favoring the two-electron reduction pathway toward H2O2. As a result, the Cu3(HHTP)2photocatalyst achieves an H2O2evolution rate of 3910 μmol g−1h−1under visible-light irradiation. These findings demonstrate that dynamically regulated Cu electronic structures provide an effective strategy for coupling charge-carrier management with selective O2activation, offering a rational approach to the design of conductive 2D photocatalysts for efficient H2O2photosynthesis.
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