Catalysts
·
2024
·Vol. 14
·期 2
·153
·
IF 3.8
Yishan Jiang,Ying Xu,Qichao Zhang,Xin Zhao,Feng Xiao,Xinbo Wang,Guojun Ma
Nowadays, it is highly desired to develop highly active and humidity-resistive ozone decomposition catalysts to eliminate the ozone contaminant, one of the primary pollutants in the air. In this work, a series of Cu2S hollow structured materials were rapidly synthesized using different structured Cu2O templates. The Cu2S from porous Cu2O showed the highest ozone catalytic decomposition efficiency of >95% to 400 ppm ozone with a weight hourly space velocity of 480,000 cm3·g−1·h−1in dry air. Importantly, the conversion remained >85% in a high relative humidity of 90%. The mechanism was explored by diffusive reflectance infrared spectroscopy which showed the decomposition intermediate of O22−, and X-ray photoelectron spectroscopy revealed the dual active site of both Cu and S. The EPR and UPS characterization results also explained the superiority of porous Cu2S catalysts from the material itself. All these results show the effective decomposition of ozone by Cu2S, especially in harsh environments, promising for active ozone elimination.
研究领域:
环境科学
·
材料科学
·
催化
·
空气污染控制
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Yunpeng Wang,Zhenhua Ge,Xing Li,Jinping Zhao,Bo Ma,Yantao Chen
Water oxidation reaction often impedes the overall water splitting for the multi-step electron transfer process. Transition metal sulfides are earth abundant and widely studied for accelerating water splitting reactions. Cuprous sulfide, which is a common mineral and generally regarded as less active for oxygen evolution reaction, can also effectively promote water oxidation by introducing coarse surfaces on the as-prepared Cu 2 S nanorod arrays, with a largely increased double layer capacitance and thereby a greatly improved electrochemically active surface area, which only needs an overpotential of 360 mV to deliver 50 mA cm −2 and exhibits a rapid kinetics for oxygen evolution reaction. The fabrication strategy of creating coarse surfaces on pre-synthesized nanostructures for increased electrochemically active surface area can be promising for developing precious-metal-free electrocatalysts by providing more active sites and surface areas for water oxidation, and is also valuable for promoting the activity of less active but earth-abundant materials to achieve a better cost-effectiveness in scale-up application of water splitting technology.
研究领域:
材料科学
·
电催化
✓ 已验证
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Yiming Zhang,Xiaoyan Yang,Yonglin Wang,Peng Zhang,Dan Liu,Yongwei Li,Zhouzheng Jin,Bhekie B. Mamba,Alex T. Kuvarega,Jianzhou Gui
For obtaining ultra-fine Cu 2 S nanoparticles with reduced recombination of their photogenerated electron/hole pairs, in-situ growth of Cu 2 S nanoparticles on exfoliated MoS 2 nanosheets was achieved in this study. We have exhaustively studied l -cysteine in-situ conjugation with sulfur defects on the surface of MoS 2 nanosheets, which makes particle-level superlattice structured Cu 2 S nanoparticles (average 6.2 nm) well disperse on MoS 2 nanosheets. Further, XPS and Raman analysis confirm that the intense interfacial effects are formed between Cu 2 S and MoS 2 for the 2-Cu 2 S-MoS 2 composite, which significantly promote separation of photogenerated electron-hole pairs and prolong their lifetime, as shown by PL and TRPL. As a result, 2-Cu 2 S-MoS 2 exhibits the fastest photoreduction rate of Cr(VI) (0.0058 min −1 ) under visible light irradiations, which are almost 8.3 times and 2.9 times higher than that of MoS 2 nanosheets (0.0007 min −1 ) and pure Cu 2 S (0.002 min −1 ), respectively. Meanwhile, 2-Cu 2 S-MoS 2 also possesses an optimal composite proportion between Cu 2 S and MoS 2 , which presents outstanding photocatalytic activity among series of x-Cu 2 S-MoS 2 composites. The photoreduction mechanism of Cr(VI) is investigated in detail. As a matter of fact, l -cysteinecoupled with sulfur defects on MoS 2 nanosheets could produce the coordination inner heterojunction interface of 2-Cu 2 S-MoS 2 samples, which greatly improves migration efficiency of photoinduced carriers and ultimately endows it outstanding photoreduction activities. Furthermore, the strategy was extended to fabricate CdS-MoS 2 and ZnS-MoS 2 heterojunctions, implying that this strategy is of promising potentials for designing more active metal sulfides heterojunction photocatalysts.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jie Zhang,Jiasheng Li,Quanxi Zhang,Donggang Guo
Constructing a Z-scheme photocatalytic system offers great advantages for boosting photocatalytic performance due to its effective charge carrier transfer and strong redox capability. Herein, Cu 2 S/CuS nanosheets heterojunction were prepared by a facile one-pot solvothermal method. CuS/Cu 2 S Z-scheme heterojunction realized rapid bacteria-killing under near-infrared (NIR) irradiation. The optimized CuS/Cu 2 S (CuS/Cu 2 S-1) achieved 99 % antibacterial efficiency against Escherichia coli ( E. coli ) within 10 min NIR irradiation. Owing to the optimization of CuS/Cu 2 S-1 Z-scheme heterojunction, the efficient interfacial charge separation was realized, thereby resulting in a high yield of reactive oxygen species. Moreover, the heterojunction exhibited locally a higher temperature under NIR irradiation, favorable for eradicating bacteria. In addition, radical scavenging tests and ESR spectra results showed that ⋅O 2 – , ⋅OH and 1 O 2 were main active species responsible for sterilization. Under the synergy of photocatalytic and photothermal effects, the membrane structure of bacteria was severely damaged in CuS/Cu 2 S-1 system. This study not only offers a reliable approach for photothermocatalytic inactivation, but also affords the bases for the development of Z-scheme heterojunction aimed at designing highly efficient photocatalysts.
研究领域:
材料科学
·
生物医学工程
·
光催化技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
·
2020
·
IF 5.797
Xinrui He,Yalin Hu,Hanqing Tian,Zhipeng Li,Pei Huang,Jing Jiang,Chao Wang
For pursing high-performance supercapacitors, both of the design strategy and structural characteristic of electrode materials are crucial. Herein, we report the in-situ growth of flexible self-assembled 3D hollow tubular Cu 2 S nanorods on Cu foam substrate (Cu 2 S@Cu). The Cu substrate is simultaneously acted as a copper source and a collector, which reduces the contact resistance. Moreover, the highly ordered 3D unique structure increases the redox reactive sites and enhances the ion transmission effectively, resulting in greatly improved electrochemical performance. Based on the Cu 2 S@Cu electrode, the supercapacitor exhibits high areal capacitance of 1000 mF cm −2 at a current density of 2 mA cm −2 , and great cycle stability, maintaining 96.9% capacitance after 10,000 cycles. Furthermore, the supercapacitor also shows an excellent flexibility with no significant decrease in the twisting or bending state. The capacity retention rates are 99.8% and 86.1%, respectively, and finally recover to 99.3%, confirming its great potential in practical application for portable electronic devices.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2023
·Vol. 136
·期 5
·2655-2665
·
IF 1.8
Wang Ziwei,Chen Ying,Liao Fang
In this study, MoS 2 /Cu 2 S/PANI with ‘wheat ear' structure was synthesized on nickel foam (NF) for electrocatalytic hydrogen production. The experimental results show that the catalyst exhibits excellent HER performance. At a current density of 10 mA cm −2 , it only has an overpotential of 98 mV. And it has good durability within 24 h. Compared with other materials, MoS 2 /Cu 2 S/PANI has better catalytic performance. There are three reasons for the enhancement of catalytic activity. On the one hand, polyaniline (PANI) has strong conductivity, which can improve the poor conductivity of MoS 2 . On the other hand, the nitrogen species derived from the PANI structural unit tend to bind metal ions such as Cu 2+ . Make the active material more evenly dispersed on the substrate. Cu 2+ further attracted negatively charged molybdate (MoO 4 2− ) to distribute uniformly on the surface of PANI. As a result, the synthesized molybdenum disulfide (MoS 2 ) is not stacked together, the specific surface area becomes larger, and the active sites increase. In addition, Cu 2 S, as a strong chemical bond between PANI and MoS 2 , should act as an electron transfer channel in the HER process. All of these make the composites exhibit excellent HER performance and thermal stability. Graphical abstract Synthesis mechanism of MoS 2 /Cu 2 S/PANI on nickel foam
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2024
·Vol. 35
·期 41
·415501
·
IF 2.9
Yanxin Liao,Shupei Sun,Qian Du,Nianfeng Shi,Guangfu Yin,Zhongbing Huang,Xiaoming Liao
Metal–organic frameworks (MOFs) are believed to be promising precursors for constructing novel and efficient catalysts for glucose sensing. Herein, HKUST-1 precursors are first fabricated using a one-pot hydrothermal approach, and then HKUST-1 is converted into porous Cu2S/CuO octahedrons through conformal sulfidation with the help of OH− ions. The as-obtained Cu2S/CuO composite can provide rich electrochemical active sites and promoted electric transfer kinetics. Benefiting from these combined merits, the as-fabricated Cu2S/CuO composite is confirmed to be a high-performance catalyst, with high sensitivities of 8269.45 and 4140.82 μA mM−1cm−2 in the corresponding ranges of 0.05 ∼ 0.6 mM and 0.6 ∼ 1.2 mM, respectively. Moreover, the as-prepared electrode materials possess good anti-interference ability, reproducibility and long-term stability. This work opens up new avenues for the design and preparation of transition metal sulfide composites.
研究领域:
材料科学
·
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2019
·
IF 4.959
Yanqiu Fu,Wei Jin
Glucose detection is of great importance for the medical diagnosis, food biotechnology and pharmaceutical analysis. In this study, we synthesized a core-shell CuS-Cu 2 S decorated carbon nanotube-graphene nanocomposite via a facile hydrothermal method. It exhibits great sensing performance towards glucose with wide linear range ranging from 0.001 to 2 mM, ultra-sensitivity of 1923 μA·cm − 2 ·mM − 1 and 0.33 μM detection limit in alkaline solutions. The excellent electrocatalytic activity originates from the synergistic effect between heterogeneous copper sulfides structures and carbon nanomaterials. Besides, the fabricate sensor also has great durability, selectivity and great potential for practical applications.
研究领域:
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Beilei Yuan,Qiqian Gao,Xueyu Zhang,Lianfeng Duan,Li Chen,Zhu Mao,Xuesong Li,Wei Lü
For improving the counter electrodes (CEs) quality of quantum dot-sensitized solar cells (QDSSCs), reduced graphene oxide (RGO)/Cu 2 S composite material has been prepared by a facile solvothermal method . The photovoltaic and electrochemical properties of the RGO/Cu 2 S CEs are investigated in detail. Compared with bare Cu 2 S CEs, the QDSSCs based on RGO/Cu 2 S composite electrodes display an apparent improvement in cell performances, the photovoltaic conversion efficiency (PCE) has been enhanced 51%. The QDSSCs with RGO/Cu 2 S CEs yield a PCE of 4.76% with short circuit current density (J sc ) of 17.10 mA cm −2 , open circuit voltage (V oc ) of 0.58 V and fill factor (FF) of 0.48. Present work demonstrates RGO/Cu 2 S composite could be a potential material for CEs of QDSSCs because of its excellent electrical conductivity, better catalytic activity, higher stability and smaller charge transfer resistance.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2021
·
IF 9.594
Yuanyuan Li,Lixue Gai,Guilin Song,Qingda An,Zuoyi Xiao,Shangru Zhai
CoS 2 /Cu 2 S embedded N/S co-doped mesh-like carbonaceous composites with enhanced electromagnetic wave absorbing performance was successfully prepared using carboxymethyl cellulose hydrogel spheres as starting materials by freeze-drying and high-temperature carbonization , in which thiourea as a source of N/S was favorably achieved. This newly designed three-dimensional mesh-like structures embedded with CoS 2 and Cu 2 S nanoparticles was confirmed by various techniques, while the N/S co-doped carbonaceous matrix, would contribute to the enhancement of electron transport , interfacial polarization , dipole polarization, ferromagnetic resonance, and magnetic coupling . This unique three-dimensional mesh structure facilitates multiple reflections and scattering of electromagnetic waves within the single matrix. By adjusting the dosage ratio between components and the filling amount of filler, the composite material exhibited a good impedance matching, which promotes the synergy between conductive loss, dielectric loss, and magnetic loss, and improves the electromagnetic wave loss. When the composite is filled with 25 wt%, there is a minimum reflection loss value of −51.68 dB at 5.20 GHz, and when the coating thickness is 4.5 mm, the effective absorption bandwidth is 3.84 GHz when the coating thickness reaches 2.0 mm. The experimental results illustrated that the synthesized composites might be alternative materials for low-frequency band electromagnetic wave absorption.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Junhua Lu,Hedong Jiang,Pingchun Guo,Jiake Li,Hua Zhu,Xueyun Fan,Liqun Huang,Jian Sun,Yanxiang Wang
In recent years, significant progress has been made in the development of supercapacitors (SCs) for high-power applications, including electric vehicles, consumer electronics, military, and industrial uses. One crucial research area focuses on enhancing the electrochemical properties of SCs through the development of superior electrode materials. A composite electrode material (CuS/Cu 2 S/rGO) that combines Cu-sulfur compounds and graphene has been synthesized using the continuous ion layer adsorption (SILAR) method on reduced graphene thin films (rGO). The CuS/Cu 2 S/rGO film SC demonstrates exceptional electrochemical properties, attributed to the synergistic effect of CuS, Cu 2 S, and rGO. At a current density of 0.5 A g −1 , the mass-specific capacitance reaches 355.70 F g −1 , with a high energy density of 49.40 Wh kg −1 and a peak power density of 8511.49 W kg −1 . Even at an increased current density of 5 A g −1 , the mass-specific capacitance remains impressive at 239.62 F g −1 , indicating excellent rate performance. Furthermore, after 1000 constant current charge and discharge cycles, the material maintains a capacity retention rate of 87.13 %, underscoring its robust cycling stability.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Shuang Sheng,Yao Yang,Yaoyao Xu,Shasha Zhao,Dongyan Fu,Hua Li,Jina Guo,Guowei Deng,Min Yang,Congdi Chen
Background: Antibiotics extensively utilized in the livestock and poultry industries due to their cost-effectiveness and significant therapeutic efficacy. In recent years, the issue of indiscriminate and excessive use of antibiotics has grown increasingly severe, posing a substantial threat to food safety and human health. Consequently, there is an urgent need to develop rapid and sensitive detection methods for antibiotics. Traditional detection methods often suffer from limitations such as expensive equipment, lengthy analysis times, and complex sample pretreatment procedures. In contrast, electrochemical sensor-based analytical methods offer advantages including simple instrumentation, rapid analysis, and high sensitivity. Results: Through the electrochemical properties of the glass carbon electrode(GCE) in its original state and under CuCo 2 S 4 @Cu 2 S/GCE, CuCoS 4 @Cu 2 S/GCE and Cu 2 CoS 4 @Cu 2 S/GCE modifications, the electrochemical active areas of modified CuCo 2 S 4 @Cu 2 S/GCE, CuCoS 4 @Cu 2 S/GCE and Cu 2 CoS 4 @Cu 2 S/GCE are 0.0643 cm 2 , 0.0740 cm 2 and 0.1056 cm 2 , respectively. Using the optimized scaled electrode Cu 2 CoS 4 @Cu 2 S/GCE, the response error was less than 5 % for five repeated samples. These results demonstrate the excellent conductivity and reproducibility of the composite, while maintaining satisfactory sensitivity and strong specificity. The Cu 2 CoS 4 @Cu 2 S/GCE based sensor has a dynamic linear range of 10–20 μmol/L with the extremely low detection limit of 0.534 μmol/L and a sensitivity of 6.37 μA μm −1 cm −2 . The sensor successfully quantified CAP in water samples with a recovery rate of 99.3 % to 102.5 % and an RSD of less than 3.2 %. Significance: This study reports the synthesis of nanocomposites exhibiting exceptional electrical sensing performance, their modification onto electrode surfaces, and their application in the rapid detection of antibiotics in food samples. The selectivity, accuracy, and practical applicability of the developed analytical method rigorously evaluated. Additionally, a systematic investigation into the electrochemical reaction mechanism of antibiotics conducted, which holds significant implications for environmental antibiotic detection.
研究领域:
分析化学
·
环境科学
·
电化学传感
·
食品安全
·
纳米材料
·
药物残留检测
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）