Journal of Materials Chemistry A
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2025
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IF 9.5
Mengjie Cao,Shuangde Li,Shikun Wang,Xin Zhou,Guangxin Ma,Yunfa Chen
The catalytic decomposition of CH4 offers a promising route to obtain pure H2, which is significant for mitigating greenhouse gas emissions and enhancing methane utilisation. Nickel-based catalysts are the most prevalent for methane cracking. However, catalyst deactivation can occur due to coking and sintering. Therefore, stabilising the active sites of Ni-based catalysts by enhancing metal–support interactions is essential for designing methane cracking catalytic systems. This study investigates the effects of adding Co, Cu and Zn on the performance of a hydrotalcite-derived NiCrAl catalyst. The results showed that Cu increased the specific surface area, decreased the electron density around Ni atoms, facilitated the reduction of NiO, and produced strong interactions between the metal and support. This improved methane decomposition at the Ni active sites and enhanced catalytic stability. The strong interaction between the metal and support suppressed nickel sintering during methane cracking. The Ni2.4Cu0.3Cr0.3Al catalyst retained 50% H2 yield for 400 min at 650 °C. Online mass spectrometry analysis demonstrated that the catalyst did not generate CO and CO2 during the methane cracking reaction. XRD and TEM results showed that Cu maintained the balance between CH4 dissociation and carbon diffusion by stabilising the size of nickel, promoting the transition of deposited carbon from carbon particles to carbon nanotubes. This work provides a reference for designing high-performance nickel-based catalysts for methane cracking.
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Lijun Xue,Jie Zhang,Chenhui Qiu,Hui Wan,Guofeng Guan
The incorporation of Cu-species, leveraging their variable valence states, represents a promising strategy for enhancing photocatalytic CO2 reduction. However, the underlying mechanism through which multivalent Cu-species facilitate this process remains inadequately elucidated, motivating further investigation. Herein, multivalent copper-modified SrTiO3 nanofibers (CuxO/STO-Y) were synthesized via an electrospinning method combined with a glucose-assisted hydrothermal process. The optimized CuxO/STO-2 nanofiber photocatalyst demonstrated a CO2 photoreduction rate to CH3OH of 7.26 μmol g−1 h−1. According to the characterization results, loading CuxO species onto the SrTiO3 nanofiber surface can broaden the light-responsive range, further improving the separation efficiency of electrons and holes. The density functional theory (DFT) calculations revealed that photogenerated electrons from SrTiO3 preferentially migrated and accumulated on CuxO sites, thereby prolonging charge carrier lifetimes and ultimately improving the CO2 photoreduction efficiency. This work highlights the crucial role of valent-engineered Cu-species in enhancing the performance of photocatalysts.
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MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Yifan Liu,Yiyu Yang,Minjie Peng,Wen Zang,Chaozhen Wang,Yuenan Zhang,Changyong Gao,Aiguo Wu,Yujie Zhang
Heparin, as a glycosaminoglycan with multiple physiological functions, performs important roles in clinical practice. The core function of heparin is its anticoagulant effect, which is commonly used to prevent and treat thrombotic diseases. However, when the heparin content in human blood exceeds the standard, it can result in thrombocytopenia, thereby posing threat to human health. Therefore, rapid, sensitive and accurate detection of heparin is of great practical importance in assessing the anticoagulant effect, prevention of thrombophilia, guidance on personalized medication, and avoiding side effects caused by excessive use. A new colorimetric sensor for detecting the anticoagulant heparin is introduced in this work. The sensor is low cost, fast, and simple. In the absence of heparin, protamine protects copper‑gold nanoparticles from the etching of iodide ions through electrostatic interaction, and the solution's color and spectral properties remain essentially the same as those of pure copper‑gold nanoparticles. When heparin is present, due to the strong electrostatic adsorption between heparin and protamine, protamine preferentially binds heparin and forms a complex. Cu-Au NPs are not protected and are etched into spherical Au NPs by iodide ions. The solution's color shifted from dark gray and purple to pink, thus colorimetric detection of heparin is realized rapidly based on the etching mechanism. The detection time is 15 min, and the detection limit is as low as 1 ng/mL. Compared with HPLC detection method, the colorimetric detection of heparin in serum samples has the recovery rate of 98.8–108.8 %, which has good prospects for application.
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ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Yixin Liu,Wenyu Dong,Tao Wang,Jianwei Zhao,Peng Li
Conventional planar copper (Cu) current collectors severely limit the rate capability and cycle life of lithium-ion batteries. To overcome this, we report a three-dimensional (3D) porous Cu-Sn alloy architecture fabricated via scalable, cyanide-free electrodeposition and chemical dealloying methods. Its core innovation lies in the synergistic benefits of the porous structure and Cu-Sn alloying: the interconnected pores facilitate rapid Li⁺ transport and buffer graphite's volume expansion, while the intrinsic lithiophilicity of Sn ensures a stable, low-impedance interface. Consequently, an anode using the optimized porous collector delivers a remarkable specific capacity of 120.3 mAh g⁻¹ at 5C, representing a nearly five-fold enhancement in high-rate capacity retention over conventional Cu foil. The collector also confers exceptional cycling stability, enabling a 57.2 % capacity increase over 200 cycles, in stark contrast to the decay observed with standard foil. Electrochemical analysis confirms that the porous design drastically reduces electrode impedance while maintaining structural integrity. This work validates that engineering the current collector architecture is a powerful and effective strategy for developing high-performance, fast-charging batteries.
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CHEMICAL PAPERS
·
2025
·
IF 2.5
Zhao Jinwen,Wang Le,Liu Xiaolan,Zhu Yanqin,Yin Qinhong
Nanozymes have been valuable tools in colorimetric analysis due to their ease of production, long-term stability, and adaptable enzymatic activity, enabling them to induce color changes in substrates. This study presents a straightforward enzyme-based colorimetric sensor for morphine ( MOR ) detection. The sensor utilized the laccase-like activity of a self-synthesized Cu, Bi-phosphotungstic acid ( Cu, Bi-PTs ) nanozyme, which was loaded with phosphotungstic acid, copper, and bismuth through a one-pot microwave method. This nanozyme was capable of catalyzing the coupling reaction of 2,4-dichlorophenol ( 2,4-DP ) and 4-aminoantipyrine ( 4-AP ), leading to the conversion of colorless phenolic compounds into red-colored products. The method demonstrated a detection limit of 1.88 μg/mL for MOR and a linear dynamic range from 3.333 to 400 μg/mL. The calibration curve, given by the equation y = 0.0015x + 0.4081, exhibited excellent linearity (R 2 = 0.9914), confirming the method's reliability for quantitative analysis. The developed colorimetric method was successfully applied to real samples, showing relative standard deviations (RSD) between 1.4 and 4.3% for MOR detection. These results demonstrated that the method was sensitive, cost-effective, and rapid, making it suitable for the efficient determination of MOR .
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APPLIED SURFACE SCIENCE
·
2025
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IF 6.9
Xuesong Peng,Fan Meng,Jie Jiang,Yaqiang Li,Guangzhao Wang,Ruopeng Li,Jialuo Lin,Longhao Zhu,Linghui Meng,Zongtai Wang,Maozhong An
Ultra-thin copper foil is critical for high-density interconnects and flexible electronics, yet developing a reliable release layer remains challenging. Here, we report an amorphous Ni–W alloy release layer and systematically evaluate its performance through experimental characterization and theoretical analysis. The Ni–W alloy (59.9 % Ni, 40.1 % W) forms a smooth, defect-free surface with an average roughness of 0.9 μm. In 50-cycle peel tests, the average peel strength stabilizes at 0.038 N/mm with a standard deviation of only 0.003, demonstrating highly controllable and stable cyclic peel behavior. The release layer maintains thermal stability below 600 °C, and atomic diffusion of Ni and W at 200 °C over 50 h has negligible impact on the copper foil conductivity. Theoretical calculations indicate that the Cu/Ni–W interface exhibits lattice mismatch, leading to weak adhesion (W a d = 1.45 J/m 2 ); in contrast, a co-deposited Ni-enriched transition layer achieves coherent lattice matching, significantly enhancing Ni–W/Cu interfacial strength and enabling differential control of interface bonding. This study represents the first scalable electro-deposition of an amorphous alloy release layer, providing precise control over peel strength and robust industrial applicability for ultra-thin copper foil production.
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APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Zhenhui Huang,Xiangying Wang,Wei Na,Xinyu Ling,Xingpeng Sun,Runqin Chen,Wengui Gao,Hua Wang
The surface properties of catalysts play a crucial role in CO 2 hydrogenation. In this study, Cu-loaded Ce–Zr oxide (CCZ) catalysts with distinct activities were synthesized via four methods. Catalytic testing revealed that the CCZ-HM catalyst exhibited the highest performance, achieving the greatest methanol space–time yield (STY). Structural and surface analyses revealed that low-valence Cu specie, oxygen vacancies, strong metal–support interactions, and balanced acid–base properties contributed to enhanced catalytic performance of the CCZ catalysts. Mechanistic studies indicated that CCZ-CP and CCZ-HM catalysts exhibited higher oxygen vacancy concentrations and enhanced surface acidity-basicity, which promoted CO₂ adsorption and the formation of carbonate species. In a CO 2 + H 2 atmosphere, both catalysts mainly formed bidentate formate species, which served as key intermediates in methanol synthesis. However, the strong adsorption capacity and limited H 2 spillover of the CCZ-CP catalyst hindered further hydrogenation of these intermediates, thereby reducing methanol production. In contrast, the excellent acid–base synergy and efficient H₂ spillover of CCZ-HM promoted the hydrogenation of CO₂-derived intermediates to methanol, resulting in enhanced STY. These findings indicate that the rational control of catalyst surface acidity, oxygen vacancy concentration, and H 2 activation ability is crucial for improving overall catalyst performance.
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Catalysts
·
2025
·Vol. 15
·期 5
·455
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IF 4
Wenjun Lei,Yan Fu,Shipeng Gu,Shuaishuai Qiu,Jie Chang
Catalytic hydrogenolysis of lignin to produce high-value monophenols has emerged as a pivotal strategy in modern biorefineries. In this study, we synthesized spherical nitrogen-doped porous carbon (SNCB) materials by using Al/Co-BTC as a precursor, introducing melamine as a supplementary carbon and nitrogen source, and activating the material with NaOH solution. The SNCB framework was decorated with Cu-Pd bimetallic nanoparticles, exhibiting outstanding catalytic activity in the hydrogenolytic depolymerization of organosolv lignin. The Cu-Pd@SNCB catalyst exhibited remarkable activity, attributed to the hierarchical porous structure of SNCB that facilitated metal nanoparticle dispersion and reactant accessibility. The synergistic effect between Cu as the reactive site for reactant adsorption and Pd as the reactive site for H2adsorption enhanced the catalytic activity of the catalyst. Systematically optimized conditions (2 MPa H2, 270 °C, 3 h) yielded 43.02 wt% phenolic monomers, with 4-(3-hydroxypropyl)-2,6-dimethoxyphenol dominating the product profile at 46.3% selectivity. The catalyst and its reaction products were analyzed using advanced characterization techniques, including XPS, XRD, TEM, SEM, BET, GC-MS, GPC, 2D HSQC NMR, and FT-IR, to elucidate the reaction mechanism. The mechanism proceeds through: (1) nucleophilic substitution of the β-O-4 hydroxyl group by MeOH, followed by (2) simultaneous hydrogenolytic cleavage of Cβ-O and Cα-O bonds mediated by Cu-Pd@SNCB under H2atmosphere, which selectively produces 4-(3-hydroxypropyl)-2,6-dimethoxyphenol and 4-propyl-2,6-dimethoxyphenol. This study proposes a bimetallic synergistic mechanism, offering a general blueprint for developing selective lignin valorization catalysts.
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CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Kang Feng,Jing Cao,Dandan Wu,Jianan Li,Qi Zuo,Shaojun Bai
This study investigates the effect of sodium percarbonate (SPC) as an eco-friendly oxidant on the flotation separation of bornite and arsenopyrite. Micro-flotation tests demonstrated that SPC significantly suppressed arsenopyrite floatability while maintaining bornite floatability. In artificial mixed-ore tests conducted at pH 10 with 500 mg/L SPC and 5 × 10 −5 mol/L sodium butyl xanthate (NaBX), bornite recovery reached 87.93 %, whereas arsenopyrite recovery was only 14.51 %, which resulted in a substantial recovery difference of 73.42 %. Surface analysis via contact angle measurements, scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), atomic force microscopy (AFM), localized electrochemical impedance spectroscopy (LEIS), X-ray photoelectron spectroscopy (XPS), and time-of-flight secondary ion mass spectrometry (ToF-SIMS) revealed that SPC treatment enhanced the hydrophilicity of arsenopyrite compared with that of bornite. LEIS, XPS, and ToF-SIMS confirmed the formation of hydrophilic oxides such as FeAsO 4 , H 3 AsO 3 , Fe(OH) 3 , and Fe 2 (SO 4 ) 3 on arsenopyrite surfaces, which ultimately reduced floatability. In contrast, bornite surfaces exhibited only slight oxidation, with minimal increases in Cu(OH) 2 , Fe(OH) 3 , and Fe 2 (SO 4 ) 3 which only resulted in a modest decrease in floatability. SEM–EDS and AFM analyses revealed significant changes in the surface morphology of arsenopyrite after SPC treatment, with increased oxygen content and surface roughness, which indicated the formation of an oxide layer. In contrast, bornite surfaces remained relatively smooth, with only a slight increase in oxygen content. This study provides valuable theoretical reference into the use of eco-friendly depressants for copper–arsenic mineral separation.
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SCIENCE OF THE TOTAL ENVIRONMENT
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2024
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IF 8.2
Xinyu Peng,Xiaoxian Zhang,Hongrui Chen,Xiaoran Zhang,Chaohong Tan,Xiaojuan Bai,Yongwei Gong,Yang Qu,Haiyan Li,Ziyang Zhang
In recent years, the escalating attention on Pharmaceutical and Personal Care Products (PPCPs) and Heavy Metals in urban stormwater runoff highlights the critical role of Road-deposited sediments (RDS) as a significant carrier for pollutant occurrence and transport in runoff. However, existing research has overlooked the composite characteristics of PPCPs and Heavy Metals, hampering a holistic understanding of their transformation in diverse forms within runoff. This limitation impedes the exploration of their subsequent migration and conversion properties, thereby obstructing coordinated strategies for the control of co-pollution in runoff. This study focuses on the typical PPCP sulfamethoxazole (SMX) and heavy metal Cu(II) to analyze their occurrence characteristics in the Runoff-RDS system. Kinetics and isotherm studies reveal that RDS effectively accumulates SMX and Cu(II), with both exhibiting rapid association with RDS in the early stages of runoff. The accumulation of SMX and Cu(II) accounts for over 80 % and 70 % of the total accumulation within the first 240 min and 60 min, respectively. Moreover, as runoff pH values decrease, the initially synergistic effect between the co-pollutant transforms into an antagonistic effect. In the composite system, varying pH values from 2.0 to 6.0 lead to an increase in SMX accumulation from 4.01 mg/kg to 6.19 mg/kg and Cu(II) accumulation from 0.43 mg/g to 3.39 mg/g. Compared to the single system, the composite system capacity for SMX and Cu(II) increases by 0.04 mg/kg and 0.33 mg/g at pH 4.0. However, at pH 3.0, the composite system capacity for SMX and Cu(II) decreases by 0.21 mg/kg and 0.36 mg/g, respectively. Protonation/deprotonation of SMX under different pH conditions influences electrostatic repulsion/attraction between SMX and RDS. The mechanism of RDS accumulation of SMX involves Electron Donor-Acceptor (EDA) interaction, hydrogen bond interaction, and Lewis acid-base interaction. Cu(II) enrichment on RDS includes surface complexation reaction, electrostatic interaction, and surface precipitation. Complex formation enhances the accumulation of both SMX and Cu(II) on RDS in runoff. This study elucidates the co-occurrence characteristics and mechanisms of SMX and Cu(II) co-pollution in runoff systems. The findings contribute valuable insights to understanding the existence patterns and mechanisms of co-pollution, providing a reference for investigating the migration and fate of co-pollutant in runoff. Moreover, these insights could offer guidance for the development of effective strategies to mitigate co-pollution in rainwater.
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PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 7
·1656
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IF 4.2
Qian Zhang,Linlin Hu,Jianyu Yang,Pengfei Guo,Jinhong Wang,Weifen Zhang
Immobilized metal ion affinity chromatography (IMAC) adsorbents generally have excellent affinity for histidine-rich proteins. However, the leaching of metal ions from the adsorbent usually affects its adsorption performance, which greatly affects the reusable performance of the adsorbent, resulting in many limitations in practical applications. Herein, a novel IMAC adsorbent, i.e., Cu(II)-loaded polydopamine-coated urchin-like titanate microspheres (Cu-PDA-UTMS), was prepared via metal coordination to make Cu ions uniformly decorate polydopamine-coated titanate microspheres. The as-synthesized microspheres exhibit an urchin-like structure, providing more binding sites for hemoglobin. Cu-PDA-UTMS exhibit favorable selectivity for hemoglobin adsorption and have a desirable adsorption capacity towards hemoglobin up to 2704.6 mg g−1. Using 0.1% CTAB as eluent, the adsorbed hemoglobin was easily eluted with a recovery rate of 86.8%. In addition, Cu-PDA-UTMS shows good reusability up to six cycles. In the end, the adsorption properties by Cu-PDA-UTMS towards hemoglobin from human blood samples were analyzed by SDS-PAGE. The results showed that Cu-PDA-UTMS are a high-performance IMAC adsorbent for hemoglobin separation, which provides a new method for the effective separation and purification of hemoglobin from complex biological samples.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Jiawei Li,Zejing Chu,Shimeng Wang,Haipeng Liu,Biao Dong
Photodynamic antibacterial based on metal organic framework (MOF) structure shows broad application prospects. But it is limited by the problem of hypoxia in the bacterial microenvironment. The oxygen-producing nanozyme strategy is the key to solving the problem. In this work, MnO 2 oxygen-producing nanozyme was introduced on the basis of the metal organic framework Cu-TCPP to obtain Cu-TCPP@MnO 2 , which can produce oxygen synchronously during PDT. Moreover, under the excitation of 660 + 808 nm dual laser irradiation, the synergistic treatment of PDT, CDT and PTT was achieved. In the in vitro antibacterial experiment, the inhibition rate of Cu-TCPP@MnO 2 against Staphylococcus aureus under dual laser excitation can reach 99.9 %, and the biofilm removal rate is close to 80 %. The inhibition rate of Escherichia coli is also as high as 99.5 %. In the in vivo treatment of mouse models, the wound area was only 2.39 % after 13 days, achieving efficient sterilization, controlling inflammation and promoting tissue repair. This synergistic antibacterial strategy has shown remarkable effects in wound healing giving the material great potential for medical applications.
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危险品化学品经营许可证（带存储）