LANGMUIR
·
2025
·
IF 3.9
Jiahang Chen,Chunrong Huang,Chaoyi Chen,Junqi Li,Yuanpei Lan
A novel silicate-based adsorbent (M-EMR) was synthesized via a hydrothermal process using electrolytic manganese residue (EMR) and calcium carbide slag (CS) in a NaOH medium. The adsorption behavior of M-EMR for Cu(II) ions from aqueous solution was systematically investigated under varying conditions. The adsorption kinetics followed a pseudo-second-order model with a high correlation coefficient (R2 = 0.9999), suggesting chemisorption as the rate-limiting mechanism. Equilibrium data were best fitted by the Langmuir isotherm (R2 > 0.999), with maximum adsorption capacities of 174.22, 185.19, and 232.56 mg/g at 288.15, 298.15, and 308.15 K, respectively. Thermodynamic analysis revealed a spontaneous and endothermic process, characterized by negative ΔG° values and positive ΔH° (41.25 kJ/mol) and ΔS° (203.88 J/mol·K). Competitive adsorption studies showed that Pb(II) significantly interfered with Cu(II) uptake, while Co(II) and Ni(II) exhibited negligible effects. M-EMR demonstrated high selectivity for Cu(II) and strong resistance to interference from coexisting cations (K+, Ca2+, Na+, Mg2+). Mechanistic analysis confirmed that ion exchange, surface precipitation, and complexation were the primary removal pathways, further supported by X-ray diffraction (XRD), Fourier-transform infrared (FTIR), and X-ray photoelectron spectroscopy (XPS) results. Cu(II) could be efficiently desorbed using 30 mmol/L EDTA, achieving a recovery efficiency of 96.62%. This study provides a cost-effective and environmentally sustainable approach for the valorization of industrial waste and the treatment of Cu(II)-contaminated wastewater.
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高影响因子
Crystals
·
2025
·Vol. 15
·期 6
·563
·
IF 2.4
Jinyi Wang,Bowen Fan,Jincheng Yu,Mengqiong Huang,Jiana Song,Zhaokun Yang,Yuan Ji
Single-phase ternary Mn-Cu-Al alloy ribbons were fabricated by melt-spinning a Mn48Cu28Al24ingot on a rotating copper roller. They were used as dealloying precursor for forming the nanoporous structure in HCl solution. The basic dealloying behavior was examined by controlling the dealloying time from 5 min to 180 min at 50 °C. Due to the active chemical property, Mn and Al elements are easily etched in acid solutions. Meanwhile, Cu elements retained and rearranged. A three-dimensional bicontinous nanoporous structure was fabricated, with a ligament size of 55 nm~100 nm and pore size of 35 nm~85 nm. The porosity evolution of dealloyed MnCuAl alloy was divided into three stages. First, the dissolution of Mn and Al is so significant that formation of pores is dominant. Stage two, the rapid growth of both ligament size and pore size. The ligament/pore ratio is nearly unchanged. The last stage is ligament coarsening. Moreover, the electrocatalytic activity for glucose oxidation of dealloyed samples is examined. The 40 min dealloyed MnCuAl ribbon exhibited the highest sensitivity and relatively maximum current density.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Guanshu Li,Yingmin Jin,Yumeng Li,Wenhao Cui,Haojie An,Ruxue Li,Chundong Li
Designing efficient and stable photocathodes remains a critical challenge for advancing high-performance photocatalytic fuel cell (PFC) systems toward simultaneous pollutant removal and energy conversion. Herein, we report a novel Cu-Cu 2 O/carbon nanofibers (CNFs) photocathode, synthesized via an electrospinning-calcination method, in which the Cu-Cu 2 O heterostructures are uniformly anchored onto conductive CNFs rich in oxygen vacancies. As a proof of concept, a dual-photoelectrode PFC system was constructed to evaluate the performance of the Cu-Cu 2 O/CNFs photocathode. The PFC achieved an 83 % degradation rate for Rhodamine B (RhB) in 2 h and a maximum power density (P max ) of 42.99 μW/cm 2 , markedly outperforming the commercial Cu 2 O-based cathode PFC system. Moreover, the PFC system assembled with the Cu-Cu 2 O/CNFs photocathode exhibited consistent degradation efficiency and power output over multiple cycles, demonstrating that the cathode plays a crucial role in ensuring the long-term stability of the system. Experimental and theoretical calculation results confirm that the unique local electronic structure and coordination environment at the Cu/Cu 2 O interface promote O 2 adsorption and lower the energy barrier for the oxygen reduction reaction (ORR). This work demonstrates a rational strategy for designing high-efficiency Cu-based photocathodes and offers new insights into optimizing photoelectrocatalytic materials for environmental and energy applications.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xiaorui Zhang,Ziheng Yang,Zikang Zeng,Laiqing Zhang,Wenxuan Wang,Xiaohe Jiang,Xingwei Ge,Yujun Liang,Chuang Han
Nitroarene reduction, a critical route for synthesizing the corresponding amines. However, conventional thermocatalytic typically involves harsh reaction conditions (high temperature, pressurized hydrogen, and anaerobic atmospheres) and relies on precious metals or extended reaction times. Herein, we have achieved photocatalytic CO 2 emission-free hydrogenation of nitroarenes at ambient conditions by introducing isolated Cu single atoms (Cu SAs) synergize with self-adaptive S vacancies (Svs) in CdS. In the presence of hydrazine servicing as an efficient hole sacrificial agent with harmless oxidation products, current design could circumvent the need for precious metals, high temperatures, strong radiation, vacuum environments, or H 2 gas. It is demonstrated that the isolated Cu sites and S vacancies act as hole-trapping centers and electron-enriched regions, respectively, which facilitate the effective separation and prolong the lifetime of charge carriers in the region, and achieve 97 % conversion of 4-NA within 8 min under mild conditions, outperforming many previously reported photocatalytic systems. In addition, the optimal Cu-CdS-5 demonstrates remarkable recyclability along with wide substrate scope. This research is expected to provide a new insight into the construction of facile and environmentally friendly photocatalytic hydrogenation reaction system.
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CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Bihong Li,Yijie Ding,Weizhong Zheng,Weizhen Sun,Ling Zhao
Zeolites have emerged as the highly potential solid catalysts in isobutane (C4) alkylation due to their adjustable acidity and structural properties. The introduction of rare earth metal or transition metal can effectively regulate the acidic site distribution and strength of beta zeolite. The structural stability, acid properties and catalytic performance of low Si/Al ratio beta zeolites functionalized with various lanthanum and copper loadings are systematically investigated for the C4 alkylation through experimental characterization and catalytic evaluation. It is revealed that the optimal metal loading can impart superior acidic properties to beta zeolites. Lanthanum modification increases the total amount of Brønsted acid sites (BAS), and enhances the population of moderate and strong BAS compared to copper modification. Catalytic evaluation demonstrated that copper-modified beta zeolites achieve a higher research octane number (RON) up to 93 for alkylate, but exhibit a shorter catalyst lifetime. Lanthanide-modified counterparts exhibit a catalytic lifetime of 320 min and 65 wt% trimethylpentane (TMPs) selectivity with relatively stable RON of 90 during a prolonged stable operation, and meanwhile, the optimal lanthanide-modified HB-1 zeolites (0.35 wt% La@HB-1) demonstrate high level of catalytic lifetime and TMPs selectivity after three cycle experiment. The information obtained from this work will contribute to a better understanding of the metal-modified low-Si/Al-ratio beta zeolites for catalyzing the C4 alkylation.
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CRYSTENGCOMM
·
2025
·
IF 2.6
Lei Chen,Rui Xu,Zhi Yang,Fuyu Chang,Lu Yang,Yoonseop Byun,Eunsoo Song,Eungyeong Park,Lihui Liu,Young Mee Jung
The two-dimensional (2D) layered structure of MXene provides a large specific surface area, making it an ideal platform for optimizing geometric configurations in surface-enhanced Raman scattering (SERS) applications. In this study, we developed a novel ternary core-shell nanostructure, Ag@Cu2O-MXene, in which Ag@Cu2O core-shell nanoparticles (NPs) are uniformly anchored onto 2D Ti3C2Tx MXene nanosheets. The Ag NPs exhibit strong localized surface plasmon resonance, while the narrow bandgap and high electron mobility of Cu2O shell promote efficient charge transfer. Importantly, plasmonic coupling between the Ag core and the MXene substrate further enhances plasmon absorption, resulting in a substantial increase in SERS activity and enabling highly sensitive molecular detection. Using this composite, we achieved an ultra-low detection limit of 10–9 M for methylene blue. MXene substrate further facilitates rapid electron transfer from the Ag core to the the Cu2O shell, while its surface defects contribute additional charge carriers to Cu₂O, enhancing the utilization of photogenerated electron. Notably, the SERS enhancement was positively correlated with the thickness of Cu2O shell, highlighting the tunable nature of the Ag@Cu2O-MXene core-shell nanostructure.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Wenbin Tang,Jin Shen,Zhongjie Shen,Jiawei Wang,Haifeng Liu
The four-step Cu–Cl thermochemical hydrogen production cycle can effectively convert heat energy into hydrogen energy, and the thermolysis reaction is the key stage for connecting the upstream and downstream reactions. This study focused on the influence of different upstream hydrolysates (Cu2OCl2 or CuO) on thermolysis and the different reaction mechanisms. The micromorphological changes during the reaction process, the specific information on the precipitated gases, and the effect of temperature and reaction time on the main and byproducts were analyzed. The results showed that the maximum CuCl yields of 84.58 and 82.26% were obtained from the thermolysis of Cu2OCl2 and CuCl2–CuO equimolar mixtures. During the reaction, both reaction feedstocks shrink and then melt and start to precipitate O2 at 430 and 415 °C, respectively. For the thermolysis of CuCl2–CuO mixtures, an excess of CuCl2 contributes to the main reaction. Finally, the complex reaction mechanism of thermolysis and product regulation was revealed.
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ACS Catalysis
·
2024
·
IF 11.3
Chong Qi,Yifu Bi,Yaolin Wang,Hong Yu,Yuanyu Tian,Peijie Zong,Qinhua Zhang,Haonan Zhang,Mingqing Wang,Tao Xing,Mingbo Wu,Xin Tu,Wenting Wu
Nonthermal plasma (NTP) offers the potential for converting CH4 with CO2 into liquid products under mild conditions, but controlling liquid selectivity and manipulating intermediate species remain significant challenges. Here, we demonstrate the effectiveness of the Cu/UiO-66-NH2 catalyst in promising the conversion of CH4 and CO2 into oxygenates within a dielectric barrier discharge NTP reactor under ambient conditions. The 10% Cu/UiO-66-NH2 catalyst achieved an impressive 53.4% overall liquid selectivity, with C2+ oxygenates accounting for ∼60.8% of the total liquid products. In situ plasma-coupled Fourier-transform infrared spectroscopy (FTIR) suggests that Cu facilitates the cleavage of surface adsorbed COOH species (*COOH), generating *CO and enabling its migration to the surface of Cu particles. This surface-bound *CO then undergoes C–C coupling and hydrogenation, leading to ethanol production. Further analysis using CO diffuse reflection FTIR and 1H nuclear magnetic resonance spectroscopy indicates that in situ generated surface *CO is more effective than gas-phase CO (g) in promoting C–C coupling and C2+ liquid formation. This work provides valuable mechanistic insights into C–C coupling and C2+ liquid production during plasma-catalytic CO2 oxidation of CH4 under ambient conditions. These findings hold broader implications for the rational design of more efficient catalysts for this reaction, paving the way for advancements in sustainable fuel and chemical production.
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高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
Zhizhu Yue,Yonghe Yu,Tianjun Hu,Ying Wang,Lulu Cao,Yanxia Zhang,Yuhong Chang,Linjuan Pei,Jianfeng Jia
The development of economical multiphase photocatalysts is a significant challenge in achieving large-scale industrialization. Rational catalyst design can help in achieving efficient, energy-saving, and green catalytic reactions, making it more feasible to screen potential catalyst candidates. In this paper, we have successfully developed a high-efficiency photocatalyst Cu-doped Cu 2 WO 4 (OH) 2 (CWOH-y, where y represents the molar ratio of copper tungsten source), which can catalyze the aerobic coupling reaction of amines to produce corresponding imines under visible light irradiation. N-benzylidenebenzylamine is synthesized under visible light at 25 °C with an 89 % yield. Under natural light at around 35 °C (mean light intensity of 50 mW/cm 2 ), 94 % of the benzylamine is converted, and 97 % of the product is N-benzylidenebenzylamine. The catalyst exhibits high efficiency due to the synergistic effect of doped Cu, Cu 2 WO 4 (OH) 2 , and visible light. This combination generates a significant amount of superoxide free radicals and singlet oxygen when exposed to visible light. Furthermore, the catalyst demonstrates universality and stability with a wide range of amine derivatives. This study introduces a new environmentally friendly photocatalytic pathway for the synthesis of imines and emphasizes the potential applications of Cu 2 WO 4 (OH) 2 .
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VACUUM
·
2026
·
IF 4.3
Junlei Qi,Yong Xia,Zhenyu Ye,Jian Cao,Yaotian Yan
As modern electronic systems advance toward compact architectures and intensified power densities, managing heat generation and dissipation has become a central challenge affecting both device stability and functional reliability. In this study, a carbon-coated three-dimensional (3D) porous copper foam composite (CFCC) was synthesized using a combined hydrothermal and annealing process to enhance heat dissipation. Optimization studies revealed that the combination of 6 g glucose with a 600 °C annealing treatment produced the most favorable coating quality. Consequently, the CFCC exhibited an in-plane thermal conductivity of 16.3 W m −1 K −1 and a thermal diffusivity of 28.5 mm 2 s −1 , representing 39.3% and 122.7% increases over pristine copper foam, respectively. Infrared thermography confirmed significantly improved heat spreading, with the optimized composite maintaining the lowest steady-state temperature (145.8 °C) under a constant 160 °C heat load. Microstructural and mechanistic investigations indicate that the improved heat-transfer capability originates from the higher ordering of the carbon domains, the decrease in structural defects, and the strengthened Cu–C interfacial interactions. These factors collectively reduce phonon scattering, extend the phonon mean free path, and minimize interfacial thermal resistance, enabling effective three-dimensional heat conduction. Overall, the integrated hydrothermal–annealing strategy presents a controllable, scalable, and cost-effective approach for producing high-quality carbon coatings on porous metal substrates, offering substantial promise for advanced thermal management in next-generation high-power electronic systems.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2026
·
IF 3.2
Hao Tang,Aotian Gu,Xiqing Xu,Pei Liu,Kehong Chen,Yiming Zhou,Chunhui Gong,Peng Wang,Yi Yang
Chloramphenicols (CAPs) are a class of broad-spectrum antibiotics. The widespread use of CAP has led to increasingly severe environmental residues, posing hidden and long-term hazards to human health and aquatic organisms. This study prepared the Co–Cu-carbon composite nanocatalyst Co x Cu 10-x -cnp by one-step pyrolysis of bimetallic MOFs with varying Co/Cu ratios. The catalytic performance of Co x Cu 10-x -cnp was further investigated through CAP degradation. Results indicate that the catalyst with a Co/Cu ratio of 6/4 exhibits the highest catalytic activity, removing 98% of CAP within 60 min with a corresponding rate constant of 0.13 min −1 . It also achieves complete mineralization of 62.5% of CAP. This may be attributed to the Co 2+ /Co 3+ redox pair efficiently generating highly oxidative free radicals, while the excellent catalytic activity and conductivity of copper promote redox cycling and accelerate the formation of reactive oxygen species (ROS). Thus, this study may contribute to advancing the design of bimetallic catalysts and the application of the PMS process in practical wastewater treatment.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.8
Yang Zhou,Xin Gu,Hongmin Gao,Hehua Zhang,Ying Liu,Dong Chang,Hongzhi Pan
The abnormally high expression of MUC1 in various malignant tumors makes it a crucial biomarker for early cancer diagnosis. This study synthesized a Cu-MOF@PtPdNPs nanocomposite exhibiting robust peroxidase-like activity via an in-situ reduction method. By integrating this nanomaterial with a dual-aptamer recognition sandwich strategy, an efficient colorimetric sensor was constructed for MUC1 detection. The nanozyme modified with aptamer2 (Cu-MOF@PtPdNPs-Apt2) was used to specifically recognize the target MUC1. Then, magnetic beads modified with aptamer1 (MB-Apt1) were used to enrich and separate the Cu-MOF@PtPdNPs-Apt2@MUC1, forming sandwich complexes. The sandwich complexes were separated and removed using magnets, and the remaining Cu-MOF@PtPdNPs-Apt2 in the supernatant was used for colorimetric detection. This sensor exhibits a linear range from 1 ng/mL to 100 μg/mL, alongside a limit of detection (LOD) of 0.211 ng/mL. Benefiting from the ingenious sandwich architecture, the sensor demonstrates high selectivity toward MUC1 and shows a good response in human serum, with recovery rates between 92.00% and 97.82%. In conclusion, this study provides a fast and sensitive technical platform for MUC1 detection.
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高影响因子
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