CHEMBIOCHEM
·
2020
·Vol. 21
·期 18
·2620-2627
·
IF 2.576
Dandan Li,Qianqian Guo,Liming Ding,Wei Zhang,Lu Cheng,Yanqiu Wang,Zhuobin Xu,Huihui Wang,Lizeng Gao
Graphical Cleaning wounds : A bimetallic CuCo 2 S 4 nanozyme exhibits enhanced peroxidase-like activity at neutral pH, and can convert H 2 O 2 into highly toxic hydroxyl radicals for killing bacteria. The CuCo 2 S 4 nanozyme effectively facilitates the healing of burn wounds infected with drug-resistant bacteria. Peroxidase-mimicking nanozymes that can generate toxic hydroxyl radicals ( . OH) hold great promise as antibacterial alternatives. However, most of them display optimal performance under strongly acidic conditions (pH 3–4), and are thus not feasible for many medical uses, including burn infections with a wound pH close to neutral. Herein, we report a copper-based nanozyme (CuCo 2 S 4 ) that exhibits intrinsic peroxidase-like activity and can convert H 2 O 2 into . OH at neutral pH. In particular, bimetallic CuCo 2 S 4 nanoparticles (NPs) exhibited enhanced peroxidase-like activity and antibacterial capacity, superior to that of the corresponding monometallic CuS and CoS NPs. The CuCo 2 S 4 nanozymes possessed excellent ability to kill various bacteria, including methicillin-resistant Staphylococcus aureus (MRSA). Furthermore, this CuCo 2 S 4 nanozymes could effectively disrupt MRSA biofilms in vitro and accelerate MRSA-infected burn healing in vivo. This work provides a new peroxidase mimic to combat bacteria in neutral pH milieu and this CuCo 2 S 4 nanozyme could be a promising antibacterial agent for the treatment of burn infections.
研究领域:
生物化学
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纳米技术
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材料科学
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医学微生物学
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Wenying Li,Yongkang Lv,Huazhang Zhao,Jianfeng Li
Electrochemical method has been used to induce peroxymonosulfate (PMS) activation for removing contaminants, yet low PMS activation rate limited its reaction activity. In this study, a microbial fuel cell (MFC) system with CuCo 2 S 4 as cathode catalyst for PMS activation (PMS/CuCo 2 S 4 -MFC) was established. The results showed that three-dimensional nanoflake structure of CuCo 2 S 4 could provide more active sites for PMS activation and exhibited the excellent electrochemical performance. The apparent degradation rate ( k a ) of Rhodamine B (RhB) in this system was 6.5 times and 1.2 times higher than MFC and CuCo 2 S 4 alone, suggesting that PMS activation was attributed to both CuCo 2 S 4 and electrochemistry in the system. In addition, the decrease of k a over five cycles in the system was approximately 3 times slower than CuCo 2 S 4 alone, indicating that the catalyst stability was improved significantly. This is mainly attributed to the in-situ regeneration of Cu 2+ and Co 3+ through receiving the electrons generated from MFC anode . The radical quenching results indicated that RhB was degraded mainly through the radical pathway, in which sulfate radical was the key reactive species. This study provides an energy-saving approach for PMS activation, which will be useful for further development of PMS-based advanced oxidation process .
研究领域:
环境科学
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电化学
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催化材料
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DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Jing Zeng,Wenqin Wu,Xiao Chen,Shenling Wang,Huimin Wu,Ahmed A. El-Kady,Amnart Poapolathep,Alejandro Cifuentes,Elena Ibañez,Peiwu Li,Zhaowei Zhang
As emerging contaminants, microplastics threaten food and environmental safety. Dibutyl phthalate (DBP, released from microplastics) and benzo[ a ]pyrene (BaP, adsorbed on microplastics) coexisted in food and the environment, harming human health, requesting a sensitive and simultaneous testing method to monitor. To address current sensitivity, simultaneousness, and on-site portability challenges during dual targets in complex matrixes, CuCo 2 S 4 /Fe 3 O 4 nanoflower was designed to develop a smartphone-assisted photoelectrochemical point-of-care test (PEC POCT). The carrier transfer mechanism in CuCo 2 S 4 /Fe 3 O 4 was proven via density functional theory calculation. Under optimal conditions, the PEC POCT showed low detection limits of 0.126, and 0.132 pg/mL, wide linearity of 0.001–500, and 0.0005–50 ng/mL for DBP and BaP, respectively. The smartphone-assisted PEC POCT demonstrated satisfied recoveries (80.00%–119.63%) in real samples. Coherent results were recorded by comparing the PEC POCT to GC–MS (DBP) and HPLC (BaP). This novel method provides a practical platform for simultaneous POCT for food safety and environment monitoring.
研究领域:
食品安全
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环境监测
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分析化学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Zhiliang Jin,Cheng Yang
The research in the field of photocatalysis has progressed, with the development of heterojunctions being recognized as an effective method to improve carrier separation efficiency in light-induced processes. In this particular study, CuCo 2 S 4 particles were attached to a new cubic CdS surface to create an S-scheme heterojunction, thus successfully addressing this issue. Specifically, owing to the higher conduction band and Fermi level of CuCo 2 S 4 compared to CdS, they serve as the foundation and driving force for the formation of an S-scheme heterojunction. Through in-situ X-ray photoelectron spectroscopy and electron paramagnetic resonance analysis, the direction of charge transfer in the composite photocatalyst under light exposure was determined, confirming the charge transfer mechanism of the S-scheme heterojunction. By effectively constructing the S-scheme heterojunction, the d-band center of the composite photocatalyst was adjusted, reducing the energy needed for electron filling in the anti-bonding energy band, promoting the transfer of photogenerated carriers, and ultimately enhancing the photocatalytic hydrogen production . performance. After optimization, the hydrogen evolution activity of the composite photocatalyst CdS-C/CuCo 2 S 4 -3 reached 5818.9 μmol g −1 h −1 , which is 2.6 times higher than that of cubic CdS (2272.3 μmol g −1 h −1 ) and 327.4 times higher than that of CuCo 2 S 4 (17.8 μmol g −1 h −1 ), showcasing exceptional photocatalytic activity. Electron paramagnetic resonance and in situ X-ray photoelectron spectroscopy have established a theoretical basis for designing and constructing S-scheme heterojunctions, offering a viable method for adjusting the D-band center to enhance the performance of photocatalytic hydrogen evolution.
研究领域:
材料科学
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能源化学
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环境科学
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DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Ziyin Yang,Sai Zhang,Yanyi Fu,Xiaohui Zheng,Jianbin Zheng
Controllable synthesis of CuCo 2 S 4 was reported for electrochemical sensing of H 2 O 2 . It is the first time that CuCo 2 S 4 was explored as electrocatalyst for H 2 O 2 oxidation. A facile hydrothermal approach is developed for the shape-controlled synthesis of CuCo 2 S 4 by just changing the type of metal precursor. The structures, compositions and electrochemical properties of CuCo 2 S 4 were studied. Electrochemical studies showed that flower-like CuCo 2 S 4 with large surface area and three-dimensional porous structure exhibited excellent electrocatalytic activity toward H 2 O 2 oxidation and an excellent analytical performances with a high sensitivity of 857.1 μA mM −1 cm −2 , a low detection limit of 0.084 μM (S/N = 3) and a wide linear range of 4 orders of magnitude were achieved. These results demonstrated that CuCo 2 S 4 was a promising efficient sensing material for electrochemical sensing of H 2 O 2 .
研究领域:
材料科学
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电化学
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传感器与生物传感器
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纳米材料
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Wenhui Li,Da Qiu,Junwei Huang,Haoyi Li,Hongna Xing,Xiuhong Zhu,Juan Feng,Yan Zong,Xinghua Li,Xinliang Zheng
The intrinsically low conductivity of CuCo 2 S 4 severely limits its electrochemical performance as an electrode. Herein, we propose an atomic-level doping strategy via a ternary Cu-Co-Ni MOF precursor to precisely incorporate Ni into the CuCo 2 S 4 lattice. First-principle calculations reveal that Ni doping introduces localized electronic states near the Fermi level, effectively narrowing the bandgap and inducing a semiconductor-to-metallic transition. This electronic structure modulation significantly enhances bulk electron mobility and strengthens the adsorption of electrolyte OH - ions. Coupled with the preserved porous carbon framework and multi-metal synergistic interface, the optimized Ni-CuCo 2 S 4 @C electrode achieves a high specific capacitance of 1046 F g -1 at 1 A g -1 . The assembled asymmetric supercapacitor delivers an energy density of 32 Wh kg -1 at 750 W kg -1 , alongside excellent cycling stability. This work elucidates the electronic origin of performance enhancement and provides a doping-guided design principle for high-conductivity metal sulfide electrodes.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Ling Kang,Chun Huang,Jian Zhang,Mengyao Zhang,Nan Zhang,Shude Liu,Yan Ye,Chen Luo,Zhiwei Gong,Chaolun Wang,Xiaofeng Zhou,Xing Wu,Seong Chan Jun
The intriguing features of copper cobalt sulfide (CuCo 2 S 4 ), such as multiple Faradaic reactions and abundant valance states, enable it a promising electrode material for supercapacitors. However, the sluggish transfer kinetics of charges and the insufficient number of active sites hamper its practical application. Herein, an efficient strategy was proposed to boost the electrochemical performance of CuCo 2 S 4 through a synergetic incorporation of F dopants and S vacancies. The induced effects of F dopant and S vacancy of CuCo 2 S 4 (denoted as F-CuCo 2 S 4−x ) on the physical characteristics and the electrochemical behaviors were investigated systemically. Experimental results reveal that through introduction of F dopants and S vacancies in dominant lattice, the low oxidation state concentrations of Cu and Co species are boosted remarkably, which lead to the improved electric conductivity and the enhanced interfacial activities of F-CuCo 2 S 4−x , and facilitate the reaction kinetics. The as-synthesized F-CuCo 2 S 4−x exhibits the ultrahigh specific capacity of 2202.7 C g −1 at 1 A g −1 , and the excellent capacity retention of 96.7% after 5000 cycles at 20 A g −1 . An asymmetric supercapacitor assembled with F-CuCo 2 S 4−x and activated carbon as the positive and the negative electrodes, respectively, delivers the favorable energy density of 49.8 W h kg −1 at 897.39 W kg −1 , as well as the long-term cycling lifetime. This study offers an effective strategy to optimize the transition metal compounds for electrochemical energy-storage devices.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jingxuan Zheng,Dapeng Meng,Junxin Guo,Zhao Wang
Transition metal sulfide (TMS) are considered promising alternatives to noble metals for high-efficiency oxygen reduction and oxygen evolution (ORR/OER). However, traditional preparation methods or post-treatment processes can lead to the formation of oxide overlayers on the TMS catalysts, which can hinder their electrochemical performance. Herein, a sulfur-vacancy enriched CuCo 2 O 4 /CuCo 2 S 4 heterostructure was prepared using cold plasma. Plasma also achieved the in-situ etching of oxide overlayers on the surface of catalysts. There is a strong correlation between the oxide overlayers and ORR/OER activity. Specifically, the number of ORR electrons transferred increased (n: from 2.8 to 3.7), while the OER overpotential decreased ( η : from 417 to 330 mV) in 0.1 M KOH with the decrease of the oxide overlayer concentration ( SO 4 2 − / S M − S : from 1.795 to 0.798). The theoretical calculation reveals the influence of oxide overlayers and S vacancy on the binding energy of the intermediate. The findings suggest that this work provides a new idea for designing metal sulfide electrochemical catalyst.
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 52
·期 1
·1-9
·
IF 2.047
Wang Liang,Jiang Shiqi,Li Xiaoyue,Huang Jiajie,Li Yaxuan,Gao Jingyi,Wang Yuting,Yang Yefeng
Cobalt disulfide (CoS 2 ) has attracted much attention as anodes of sodium-ion batteries (SIBs) due to its high theoretical capacity. Nevertheless, the serious volume variation and polysulfide dissolution issues during cycling usually lead to poor electrochemical performance, greatly limiting its application. Here, by employing a CuCo-based metal organic framework (MOF) and bacterial cellulose (BC) as precursor and template, we have fabricated heterostructured CoS 2 /CuCo 2 S 4 particles anchoring on an N-doped carbon framework (denoted as CuCo-S/NC) through ion adsorption and exchange reaction with a subsequent thermal annealing process. The generation of a CoS 2 /CuCo 2 S 4 heterostructure which can boost the charge transfer rate in the hybrid composite has been investigated, while the introduction of an N-doped carbon framework derived from the BC could not only enhance the electrical conductivity but also improve the structural integrity by mitigating the mechanical stress and inhibiting the aggregation of active materials. Benefitting from the designed composition and structure, the optimal CuCo-S/NC electrode exhibits a high capacity of 889 mAh g −1 at 0.2 A g −1 and an outstanding rate capability of 394 mAh g −1 at 10 A g −1 . The results achieved in this work indicate the great potential of this bimetallic MOF-derived template method for the rational design and fabrication of novel hybrid composite anodes for high-performance SIBs.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Yuqi Wang,Yu Li,Kaige Huang,Mengmeng Ma,Zhanwei Shen,Aiwei Tang,Xiaomin Dou,Shizhong Yue,Zhijie Wang
Simultaneous achievement of green hydrogen production and pollutant removal is an attractive approach for mitigating energy scarcity and environmental pollution. This work successfully constructed an all-solid-state CdZnS/CNT/CuCo 2 S 4 Z-scheme heterojunction via a combined hydrothermal and solvent evaporation approach, enabling highly efficient bifunctional photocatalytic performance in hydrogen production and tetracycline removal. Benefiting from visible light excitation, the tailored CdZnS/CNT/CuCo 2 S 4 heterostructure delivered an outstanding photocatalytic H 2 generation activity, as high as 10.29 mmol g −1 h −1 . The catalytic performance was 3.3 times superior to pristine CdZnS. Moreover, it achieved 92.3% degradation of tetracycline within 30 min. The boosted photocatalytic performance originates from the Z-type charge transmission pathway supported by CNT electron bridges, significantly promoting carrier separation and transport. Excited electrons in CdZnS reduce water to produce hydrogen, while the holes in CuCo 2 S 4 degrade tetracycline. This study paves a rational pathway for the fabrication of Z-scheme heterojunction photocatalysts that employ carbon nanotubes as electron mediators.
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Xuehui Wang,Guangwu Zhang,Kaifeng Huang,Xiang Fang,Cheng Wang,Haojun Xu,Chenchen Zhang,Xiaoya Wang,Qiye Zheng,Jinyun Liu
Heterostructured cathodes are widely credited with accelerating conversion kinetics in magnesium/lithium hybrid-ion batteries (MLHBs). Here, we construct a Cu7S4/CuCo2S4 heterostructure in a single hydrothermal process, in which the two phases sharing a common Cu-S sublattice form a coherent interface within individual particles. By fixing the phase ratio independently through Rietveld refinement and benchmarking against both phase-pure constituents under identical conditions, we show that the composite exceeds the composition-weighted rule-of-mixtures prediction by a factor of 3.4 at 0.3 A g-1. Because the constituents exhibit closely comparable charge-discharge profiles, the redox chemistry itself is unchanged, and this strongly super-additive response can primarily originate from the interface rather than from composition. Elemental mapping and surface-sensitive XPS, together with the coexistence of Li2S and MgS in in situ XRD, further reveal that storage is spatially partitioned: Li+ converts the particle interior while Mg2+ reacts predominantly in the near-surface region, so that the two carriers occupy complementary regions of the same particle. Comparing APC-LiCl with APC-LiTFSI at matched salt concentration, and identical in every other respect, localizes the electrolyte effect to the electrode interface, where the chloride-containing system suppresses the progressive Mg-surface passivation that drives continuous overpotential growth in the TFSI- system. The resulting cell delivers 400 mAh g-1 at 0.3 A g-1 and retains 152.56 mAh g-1 after 330 cycles at 1.0 A g-1 at ∼100% Coulombic efficiency. DFT calculations indicate increased states near the Fermi level and a localized interfacial electrostatic gradient consistent with the measured kinetics.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Yang Liu,Hailong Feng,Weiyi Li,Xueping Wang,Guoxiang Huang,Longxia Wang,Xingqiu Li,Yuxing Xie,Chenglu Liang
Catalysts in-situ reconstructed from transition metal sulfides for oxygen evolution reaction (OER) have been regarded as potential alternatives for the noble metal catalysts . Intriguingly, it was found that the self-optimized SO 4 2− @Cu doped Co(OH) 2 catalyst was reconstructed from bimetallic sulfide of CuCo 2 S 4 . During the OER process, the copper was partially leached and meantime doped into the in-situ generated Co(OH) 2 with SO 4 2− adsorption, while only oxides were discovered in counterparts of mono-metal sulfides. As a result, the SO 4 2− @Cu doped Co(OH) 2 catalyst exhibited superior OER performances, with low overpotentials of 211/272 mV to achieve the current densities of 10/100 mA cm −2 , exceeding the counterparts reconstructed from mono-metal sulfides. Experimental and theoretical results suggested that the in situ generated Cu doped Co(OH) 2 possessed thin and loosely layered structure with expanded lattice spacing (lattice spacing expanded from 0.28 nm to 0.46 nm) due to the SO 4 2− adsorption, making the intermediates more accessible to the active centers. In addition, the catalyst surface changed from hydrophobicity to super hydrophilicity , which greatly accelerated the mass transfer. This work indicated that the in-situ reconstruction process was greatly influenced by the interactions between metal sites and sulfide species, directly influencing the OER performances of the reconstructed catalysts.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）