Journal of Cleaner Production
·
2019
·
IF 6.395
Junwen Qi,Guoping Wei,Yubo Yan,Xiuyun Sun,Lianjun Wang,Jiansheng Li
Protecting the staff on site from exposure risk to toxic industrial chemicals (TICs) in an efficient way is of great significance. However, simultaneous removal of multicomponent TICs with different physical and chemical properties is a challenge for porous carbon materials. In this work, Cu-carbon beads with tailored porous structure and chemical property were synthesized via phase inversion-carbonization (PIC) route. The in-situ introduction of copper species was accomplished via coupling solidification-reduction of copper species and PIC process. The obtained Cu-carbon beads possessed uniform spherical shape (Φ1.3 mm) with good mechanical strength, developed porous structure and abundant chemical groups. Three kinds of TICs with different chemical properties, i.e. benzene (nonpolar), ethanol (polar) and H 2 S (inorganic), were selected as probes to evaluate the simultaneous elimination performance of Cu-carbon beads. The optimized Cu-beads-3 exhibited excellent performance for multicomponent TICs with capacities of 491.9 mg benzene/g, 192.1 mg ethanol/g and 76.2 mg H 2 S/g, representing 74.0, 60.3 and 99.2% capacities compared with monocomponent TICs. The enhanced adsorption of H 2 S were ascribed to chemisorption of copper species and basic groups on Cu-carbon beads. These results indicated that Cu-carbon beads would be a promising candidate for the simultaneous elimination of TICs with different chemical properties.
研究领域:
环境科学
·
材料科学
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CATALYSIS LETTERS
·
2026
·Vol. 156
·期 2
·50
·
IF 2.4
Cheng Hongna,Wang Chaoyong,Wang Zihan,Peng Weikang,Hou Jiayi,Tian Shiting,Shi Zixuan,Liu Ying,Li Fengfeng,Zhang Mingxi
The climate crisis caused by excessive carbon dioxide (CO 2 ) emissions urgently call for efficient electrocatalytic reduction technology to convert CO 2 into high value-added products. In this study, nickel polyphthalocyanine (NiPPc) electrocatalysts with different copper (Cu) doping amounts (10–90 wt%) were prepared by solvothermal method, Combining X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and other characterization and electrochemical testing, it is found that: Doping with 10 wt% Cu significantly enhanced catalytic activity, achieving a current density of 325 mA cm −2 at − 0.6 V (vs. RHE)—2.8 times that of the sample; 50 wt% Cu doping optimized the Cu–N 4 active sites, yielding a carbon monoxide (CO) Faraday efficiency of up to 95% at − 1.0 V; 30 wt% Cu-doped catalyst can generate CO: H 2 = 1:1 syngas, A controllable catalyst design strategy is provided for CO 2 electrocatalytic reduction. Graphical Influence of Cu Loading (10–90 wt%) on Electrocatalytic CO 2 Reduction Activity and CO Selectivity of NiPPc Catalysts.
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CARBON
·
2026
·
IF 11.6
Yin Zhao,Jiali Li,Yuehua Liu,Zheng He,Yuzhe Qian,Zhi Wang,Junhao Liu,Deping Xu,Yonggang Wang,Xuzhong Gong
Commercial silicon-graphite anodes typically restrict the silicon fraction below 10 % to preserve structural integrity, yet this compromises their energy density. When the silicon content rises to ∼20 %, the severe volume mismatch between silicon and graphite generates interfacial delamination, SEI overgrowth, and rapid capacity decay. Conventional carbon coatings fail to resolve this conflict—soft carbons creep plastically, while hard carbons are rigid but disordered, causing brittle fracture and weak interfacial bonding. Here, we introduce a Cu-regulated carbonization microenvironment strategy to construct a robust silicon-graphite composite. Trace Cu catalytically redirects the pyrolysis of glucose toward aromatization-graphitization, yielding a high- sp 2 , densely stacked carbon sheath with superior conductivity and mechanical strength. Simultaneously, Cu acts as a chemical welder, weakening Si–Si bonds and inducing covalent Si–C/Si– O –C linkages that anchor the carbon shell to the active core. The resulting Cu-templated composite maintains structural integrity and achieves 94.3 % capacity retention after 600 cycles at 0.2 A g −1 . This work establishes a dual catalytic-interfacial function of Cu, offering a new paradigm for carbon microenvironment regulation in high-silicon composite anodes.
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Nature Communications
·
2026
·
IF 15.7
Shen Shiji,Wu Zhenduo,Liu Xiaoye,Lan Si,Wang Chengwei
With increasingly stringent application environments, there is a growing demand for designing and fabricating of promising structural materials. Conventional metallurgical methods typically struggle to produce positive mixing enthalpy alloys with uniform microstructures and consistent properties due to mutual immiscibility and uncontrollable segregation during solidification. To this end, we employ a bottom-up approach to fabricate Cu-50 vol% Fe 55 Cr 25 Mo 16 B 2 C 2 positive mixing enthalpy composites, utilizing ultrafast high-temperature sintering and instantaneous quenching. The method effectively prevents liquid segregation during the molten state and allows precise control over the size and distribution of the two phases. In addition, incorporated metallic glass particles as the hard phase additives, which can quickly form the localized multi-phase nanocrystals and establish a robust interlocking structure with pure copper during rapid sintering. Upon rapid quenching, the two phases solidify with a tight and conformal interface, while the elemental cross-diffusion and phase separation are mitigated. The mechanical tensile strength of the resulting composite is approximately 8 times greater than that of pure Cu. The wear resistance improves by 40-50 times, and the Vickers hardness increases by a factor of 10. The innovative sintering method provides a feasible pathway for developing and manufacturing of positive mixing enthalpy composite materials.
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PubMed
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Fengli Shao,Shaoyu Zhou,Jiaxin Xu,Qiong Du,Jianqiu Chen,Jingge Shang
Nanoscale zero-valent iron (nZVI) has been proven to be more effective for the treatment of hexavalent chromium(Cr(VI)) when modified with the transition metal Cu. In this study, biochar-supported Cu/Fe bimetallic nanoparticles (Cu-nZVI/BC) were prepared and used for Cr(VI) removal from aqueous solution. The effects of the pH value, the initial concentration of Cr(VI), coexisting ions and humic acids (HA) were investigated. The compositional structures of Cu-nZVI/BC were analyzed by transmission electron microscopy, scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The maximum removal efficiency of Cr(VI) was 50.57% (126.41 ± 3.75 mg g –1 ) for Cu-nZVI/BC at pH 2. The adsorption kinetic data were in agreement with the pseudo-second- order model, which confirmed that the adsorption step was a chemical adsorption and reduction process. The presence of Ca 2+ and NO 3 – had an inhibitory effect on Cr(VI) removal, while dHA increased the removal efficiency at high concentrations. This study proves that Cu-nZVI/BC removal of solution Cr(VI) is feasible and shows significant potential in practical applications.
研究领域:
环境科学
·
纳米技术
·
水处理
·
污染物修复
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Peibo Li,Guoqiang Luo,Xiaoshan Zhang,Xiao Wang,Zhihao Wu,Yi Sun,Qiang Shen
As one of the most commonly used binary alloys , the effect of intermetallic compounds (IMCs) of Al-Cu alloys in powder metallurgy on their structure and properties is instructive for tailoring Al-Cu alloys for different applications. In this investigation, a series of Al-Cu-Ag alloys with varying Cu compositions were fabricated via hot pressing. TEM analysis identified CuAl 2 as the primary intermetallic compounds , with Ag existing in forms including Ag 2 Al, elemental Ag, and an Ag-(Cu) solid solution . The modulation of Cu content influenced the state of Ag and the mechanical behaviors of the Al-Cu-Ag alloy. Particularly, the high Al/Cu alloy, benefiting from a synergistic effect comprising stacking faults, nanoscale precipitates, and solid solutions, exhibited outstanding mechanical properties. Conversely, the Al-50Cu-3Ag alloys displayed significant brittleness , attributed to the adverse impact of large-scale intermetallic compounds and increased grain size due to the formation of CuAl 2 . The incorporation of nanoparticles effectively mitigated the grain size in high Al/Cu alloys. This study elucidates the correlation between the evolution of intermetallic compounds and composition in Al-Cu alloys, offering novel insights into the reinforcement of both Al-based and Cu-based alloys.
研究领域:
材料科学
·
金属学与热处理
·
粉末冶金
·
结构材料
·
合金设计
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Qionghua Zheng,Liangming Wang,Xiaoyun Guo,Yebin Feng,Jincheng Chen,Yin Zhang,Qi Zhang,Shaobin He,Wei Chen
Synergistic coupling between Cu and Os endowed nanozyme with dual enzyme-like activities. • Cu modulation simultaneously improved efficiency and reduced noble metal consumption. • Peroxidase- and ascorbate oxidase–like activities were integrated into a single nanozyme. • Multimodal biosensing was realized via colorimetric and fluorescence readouts. Dual metal nanozymes with synergistic catalytic effects provide a versatile platform for biosensing applications. In this work, a carboxylated chitosan–supported Cu/Os dual-metal nanozyme (CC-CuOs) was developed. The incorporation of Cu introduced ascorbate oxidase–like activity, enhanced the intrinsic peroxidase-like performance of the Os-based nanozyme, and reduced noble metal consumption, thereby improving overall cost efficiency. Benefiting from these dual enzyme-like activities, CC-CuOs was employed as a unified catalytic platform to construct two complementary biosensing systems. A cascade colorimetric assay for choline detection was developed based on peroxidase-like activity, exhibiting a linear response over 1–400 μM with a detection limit of 0.85 μM. In parallel, a fluorescence-based sensing strategy for alkaline phosphatase was realized by exploiting the ascorbate oxidase–like activity of CC-CuOs, enabling quantitative detection from 10 to 500 U·L −1 with a detection limit of 0.91 U·L −1 . Both sensing platforms exhibited satisfactory accuracy, selectivity, and reproducibility when applied to human serum. Overall, this study highlights the potential of CC-CuOs nanozymes for constructing multimodal biosensing platforms through synergistic dual enzyme-like activities. Download: Download high-res image (66KB) Download: Download full-size image
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ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Dingbin Yang,Jiahong Zhang,Jiaqi Xu,Qiao Zhang,Guangxing Yang,Zhiting Liu,Yong Liu,Feng Peng
A key biomass-derived platform molecule, furfural (FF), offers immense potential for synthesizing valuable chemicals like furfuryl alcohol (FAL) through catalytic hydrogenation. Copper-based catalysts stand out for this conversion owing to their adjustable active sites, economic viability, and decent stability. Nevertheless, conventional Cu electrodes exhibit limited performance, and the atomic-scale catalytic mechanisms remain unclear. In this study, we developed a series of oxide-derived copper (OD-Cu) catalysts with precisely controlled Cu(100) to Cu(111) facet ratios for the electrochemical hydrogenation of furfural. Remarkably, the cube-shaped OD-Cu catalyst, dominated by Cu(100) facets, delivered an exceptional FAL selectivity of 97.7%, far exceeding the 61.1% selectivity achieved by its octahedron-shaped counterpart with predominant Cu(111) facets. Density functional theory (DFT) calculations provided atomic-level insights, revealing that the Cu(100) surface induces greater elongation of the aldehyde C═O bond in adsorbed FF compared to Cu(111), indicating superior activation of this critical functional group. Additionally, the calculations demonstrated stronger furfural adsorption on Cu(100) than on Cu(111). These combined effects synergistically enhance catalytic performance.
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高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 10
·期 9
·7783-7793
·
IF 1.5
Fen Wang,Xian Jing Yang,Qi Guo Chen,Mei Chao,Chun An
Pd/Ag/Cu electrode was successfully prepared on Ag dendrites with Cu substrate (Ag/Cu) by galvanic replacement reactions, and was characterized by scanning electron microscopy, X-ray diffraction and transmission electron microscopy. The electroreductive dechlorination reaction of 2,3-dichlorophenol on Pd/Ag/Cu electrode was investigated by cyclic voltammetry and in situ FTIR techniques. Compared with Pd/Cu, Ag/Cu and Cu electrodes, Pd/Ag/Cu electrode exhibited the highest electrocatalytic activity for electroreductive reaction of 2,3-dichlorophenol. C-Cl bond was broken by reaction of adsorbed 2,3-dichlorophenolate with (H) ads Pd on Pd/Ag/Cu electrode surface. The main intermediate was 2-chlorophenolate, and the final product was phenolate.
研究领域:
环境化学
·
电催化
·
材料科学
·
分析化学
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Libo Shi,Xiang Zhu,Tingting Liu,Hongli Zhao,Minbo Lan
In this work, we applied metal-organic frameworks (MOFs) as a porous matrix to encapsulate Cu nanoparticles (NPs) for nonenzymatic glucose sensing in alkaline media . SEM and TEM confirmed that the size of the encapsulated Cu NPs ranges from 2.5 to 5 nm. The hybrid of Cu NPs encapsulated in ZIF-8 (Cu-in-ZIF-8) was further modified onto screen-printed electrodes for nonenzymatic sensing of glucose in alkaline medium. The porous structure of ZIF-8 are beneficial for the unimpeded diffusion of glucose and reaction product. And as a matrix for encapsulating Cu NPs, ZIF-8 also protect the Cu NPs from dissolution and agglomeration during the electrocatalytic process. For comparison, the electrochemical performance of Cu NPs loaded on ZIF-8 (Cu-on-ZIF-8) was also investigated and it is found that Cu-in-ZIF-8 exhibited higher activity and better stability for cyclic test toward the oxidation of glucose in alkaline media. Additionally, Cu-in-ZIF-8 based glucose sensor also shows a favorable sensitivity and selectivity.
研究领域:
材料科学
·
分析化学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Guangping Lei,Guojun Xi,Zihan Liu,Qibin Li,Huiyuan Cheng,Hantao Liu
Efficient capture and separation of CO 2 from flue gas and natural gas are highly promising to reduce carbon emissions and promote fuel calorific value. Here, a novel adsorbent (FeTPPs@Cu-BTC) for CO 2 separation was synthesized by encapsulating 5, 10, 15, 20-tetrakis (4-sulfonatophenyl) porphyrinato iron (III) chloride (FeTPPs) into the cages of Cu-BTC through an in-situ packaging strategy. Such strategy efficiently overcomes the shortcoming of pore clogging and leaching induced by incorporating guest molecules through the wet impregnation method. Meanwhile, more tunable micropores and extra affinity sites for CO 2 adsorption were created after encapsulation of FeTPPs, which preferably enhanced the CO 2 uptakes of FeTPPs@Cu-BTC under low pressures and promoted the separation performances for CO 2 /N 2 (15:85, v/v) and CO 2 /CH 4 (50:50, v/v) mixtures. The corresponding selectivity of FeTPPs@Cu-BTC calculated by ideal adsorbed solution theory (IAST) respectively increase to 57.7 and 14.0 from 36.0 and 10.8 of the pristine Cu-BTC at 273 K and 100 kPa, which also exceeds most reported adsorbents. Grand Canonical Monte Carlo (GCMC) simulations further elucidated that extra interaction with CO 2 and ‘sieve effect’ for N 2 or CH 4 after FeTPPs encapsulation immediately boost CO 2 uptakes and separation performance of FeTPPs@Cu-BTC. This study provides a new design idea for the development of new adsorbent materials.
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Small
·
2023
·Vol. 19
·期 40
·2303099
·
IF 13.3
Zi Yang,Deguang Ji,Zhi Li,Zidong He,Yang Hu,Jie Yin,Yichao Hou,Pinxian Xi,Chun-Hua Yan
Copper-based electrocatalysts effectively produce multicarbon (C 2+ ) compounds during the electrochemical CO 2 reduction (CO 2 RR). However, big challenges still remain because of the chemically unstable active sites. Here, cerium is used as a self-sacrificing agent to stabilize the Cu + of CuS, due to the facile Ce 3+ /Ce 4+ redox. CeO 2 -modified CuS nanoplates achieve high ethanol selectivity, with FE up to 54% and FE C2+ ≈ 75% in a flow cell. Moreover, in situ Raman spectroscopy and in situ Fourier-transform infrared spectroscopy indicate that the stable Cu + species promote C C coupling step under CO 2 RR. Density functional theory calculations further reveal that the stronger * CO adsorption and lower C C coupling energy, which is conducive to the selective generation of ethanol products. This work provides a facile strategy to convert CO 2 into ethanol by retaining Cu + species.
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高影响因子
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