Progress in Natural Science-Materials International
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2020
·
IF 4
Guangzhen Cui,Linbo Wang,Ling Li,Wei Xie,Guangxin Gu
MXene, a novel two-dimensional (2D) multi-layer material, has drawn unusual interest as the microwave absorbers for electromagnetic energy attenuation. Synthetic MXene-based heterostructure composites via optimizing structure is an effective strategy to endow MXene materials with high-performance microwave absorption. This study reports the fabrication and investigation of the microwave absorption performance of a sandwich-like CuS/Ti 3 C 2 T x MXene composites prepared by loading CuS nanoparticles onto 2D Ti 3 C 2 T x via a solvothermal method. The morphology and electromagnetic absorption properties of this composite were investigated and the results demonstrated that the CuS/Ti 3 C 2 T x composite with a heterolayered architecture displayed superior microwave absorption ability. With a 35 wt% filler loading in the paraffin matrix, the minimum reflection loss value reached −45.3 dB at a frequency of 7.3 GHz and the effective absorption bandwidth achieved a value as high as 5.2 GHz with a thickness of 2.0 mm. The enhanced microwave absorption performances can be ascribed to the cooperation of the conductive network, interface polarization, dipole polarization, multiple reflection and scattering. Therefore, the synthesized CuS/Ti 3 C 2 T x MXene composites offer an efficient foundation for the design and utilization of other lightweight microwave absorbers.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Hongtao Ren,Wence Xu,Shengli Zhu,Zhenduo Cui,Xianjin Yang,Akihisa Inoue
Nanoporous CuS and Ag 2 S/CuS composite are synthesized by chemical dealloying method. The Ag 2 S content of the composite catalysts is controlled by Ag atom in the original amorphous alloys. The composite catalysts reveal an good activity for hydrogen evolution reaction (HER) with a small potential of ∼0.2 V when current density is 10 mA cm −2 and a high current density of 163.4 mA cm −2 at 400 mV overpotential, which is associated with the enriched active sites on CuS and the improved electrical conductivity by Ag 2 S. The Tafel slope of Ag 2 S/CuS (75 mV dec −1 ) indicates that the combination of VH (Volmer-Heyrovsky) and VT (Volmer-Tafel) mechanisms might be involved to produce molecular hydrogen over Ag 2 S/CuS catalysts and the rate-determining step is likely some other than purely Heyrovsky or Tafel step. In addition, the composites exhibit good durability in acidic electrolytes and this method would open up a new type of highly efficient electrocatalyst.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2021
·
IF 3.423
Tianming Zhao,Qi Wang,An Du
To alleviate the energy shortage and to improve the environmental problems, low-cost and highly efficient materials for H 2 production are of considerable importance. Here, we report a nanostructure from CuS/ZnO NWs on steel mesh via a two-step hydrothermal route for piezo-photocatalytic H 2 production. The CuS/ZnO exhibits an absorption band in visible and ultra-violet bands. Under solar and ultrasonic exposure, the CuS/ZnO NWs demonstrate great piezo-photocatalytic performance (140 μmol g −1 h −1 ). The working mechanism can be attributed to the piezo-photocatalytic effect that the photogenerated electrons and holes are driven along opposite directions by built-in electrical field, decreasing the recombination rate and producing H 2 . This H 2 production mechanism holds great promise for development novel clean fuel.
研究领域:
材料科学
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能源科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yachao Xu,Zhong Zhou,Peng Yu,Ying Wang
Synergistically tuning electronic states at the atomic level to facilitate photocatalytic overall water splitting is a challenge. However, elucidation of the role of specific electronic states of Znln 2 S 4 (ZIS) in regulating both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) is still scarce, making it difficult to accurately predict the actual photocatalytic performance. Here, the substitution of Zn sites with Al atoms was found to modulate the potential difference of the ZIS surface domain heterojunction structure, and electrons were further transferred to CuS to form a built-in field that promotes charge separation. When Al doping is present on the ZIS surface, ZIS exhibits p-type semiconductor properties, which leads to the formation of p-n junctions within Al-CuS/ZIS itself. Due to the large work function and metallic properties of CuS, and Al-CuS/ZIS as a whole tends to form a Schottky heterojunction, and the two heterojunction structures synergistically promote the migration of photogenerated carriers. In addition, the Al doping changes the electronic states around the ZIS, allowing the Al ZIS to promote the adsorption of O* and H* during OWS. The solar-driven photocatalytic overall water splitting efficiency of Al-CuS/ZIS is as high as 153.6 (HER) and 73.1 (OER) μmol/h g −1 , which is about 10 times that of ZIS. This work opens the possibility to design efficient photocatalytic materials through tunable composition and electronic structure.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Junhua Lu,Hedong Jiang,Pingchun Guo,Jiake Li,Hua Zhu,Xueyun Fan,Liqun Huang,Jian Sun,Yanxiang Wang
As excellent energy storage devices, supercapacitors (SCs) have received widespread attention. Designing a reasonable SC device structure and exploring better active electrode materials are important ways to improve the electrochemical performance of supercapacitors. CuS electrodes were prepared in situ on a brass substrate by using an in situ chemical reaction method. The impact of the temperature and duration of concentrated hydrochloric acid treatment on the electrode materials was examined. Morphological and compositional analyses of the CuS electrode materials were conducted using SEM, EDS, XRD, Raman spectroscopy, and XPS. The electrochemical properties were assessed through CV, GCD, and EIS. By utilizing a 70 min treatment with concentrated HCl at 78 °C, CuS materials exhibiting nanosheet/nanoparticle composite morphologies were synthesized. The nanoparticles were approximately 10 nm in diameter, while the nanosheets, which were interconnected to form honeycomb structures, were 300 nm in diameter and 10 nm in thickness. When the current density was set at 5 mA cm–2, the area-specific capacitance of the CuS electrode reached 1814 mF cm–2. An asymmetric supercapacitor, CuS∥rGO, was fabricated by using the aforementioned conditions for the anode and rGO for the cathode. This configuration achieved a surface capacitance of 256 mF cm–2 at a current density of 2 mA cm–2. The maximum energy density attained was 0.05 mWh cm–2, with a peak power density of 12.15 mW cm–2. After 10,000 constant current charge–discharge cycles, the capacity retention rate reached 74%, while the Coulombic efficiency remained above 96%.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2022
·
IF 3.475
Zhenliang Li,Xuerui Liu,Shuye Li,Enke Feng,Zhiqiang Wu,Zhiming Yang,Xinxian Ma,Xinning Han
In view of recent advances in photodegradation of antibiotics, low cost and stable photocatalyst remain rare. In this article, shape-controlled Cu2O@CuS nanocubes with the larger specific surface area were successfully prepared via a simple template-engaged strategy. Cu2O nanocubes were synthesized through a reduction method as original templates, the core-shelled Cu2O@CuS nanocubes were formed by sulphuration with Na2S as sulphur source, and the Cu2O core can be incompletely removed by Na2S2O3 to generate the Cu2O@CuS nanoboxes. Herein, hierarchical nanoboxes with two-layered Cu2O@CuS were used as photocatalyst materials for photocatalytic degradation of tetracycline (TC). The obtained nanocubes manifested high specific surface area (39.65 m2 g−1) and large pore volume (12.3 cm3 g−1). The degradation performance for TC was investigated in detail, including the effect of parameters such as photocatalyst, pH and catalyst dosage. The results indicated that degradation efficiencies were higher than 90% under visible light. Moreover, the degradation efficiency was 71% after six times.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Rongping Xu,Jinlong Li,Guozhe Sui,Yan Zhuang,Dongxuan Guo,Ze Luo,Shuang Liang,Hong Yao,Chao Wang
The construction of heterojunctions is considered as an effective strategy to boost catalytic degradation activity of photo-Fenton catalyst. Herein, a series of CdS@CuS/g-C 3 N 4 (CC-x/CN) heterojunctions have been successfully prepared by hydrothermal and cation exchange process, which have been applied for the removal of methyl orange (MO) via photo-Fenton process. The results demonstrate that the exchange of Cu 2+ for Cd 2+ on g-C 3 N 4 could inhibit the aggregation of CdS@CuS and increase the light absorption range and the active sites. Under visible light illumination, CC-10/CN (molar ratio of CuS to CdS is 10%) exhibits the optimal photo-Fenton-like catalytic performance with the degradation efficiency of 96% towards MO (40 mg L −1 ) and the total organic carbon removal rate of 75% within 35 min illumination. The apparent reaction rate constant of CC-10/CN (0.088 min −1 ) is approximately 22 and 6.29 times higher than those of pure g-C 3 N 4 and CdS@CuS (molar ratio of CuS to CdS is 10%), respectively. The enhanced photo-Fenton catalytic activity of CC-x/CN is mainly ascribed to the formation of the photo-Fenton effect between CC-10 and g-C 3 N 4 , which promotes the conversion and recycling of Cu 2+ and Cu + . Meanwhile, the successful formation of the heterojunctions reduces the recombination rate of carriers. In addition, the cycling experiments demonstrate that CC-10/CN possesses favorable stability and recoverability. Overall, the well-designed CC-x/CN heterojunctions reveal desirable potential application in the effective treatment of sewage via photo-Fenton process.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ChemMedChem
·
2021
·Vol. 17
·期 3
·e202100570
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IF 3.466
Yan Zhao,Jing-Jing Zhao,Jia-Xin Guo,Shuang-Qing Liu,Yang Li,Xiao-Yi Wang,Rong Li,Hui-Qin Tang,Zhen-Yu Li,Hui-Fen Yang,Bing Chen
Graphical Getting under the skin : BSA-CuS nanoparticles were used as photothermal reagents for depth photothermal therapy (PTT) treatment of subcutaneous abscesses. These nanoparticles exhibited remarkable photothermal conversion and low cytotoxicity combined with tissue-penetrating NIR laser (1064 nm) light. PTT based on BSA-CuS and 1064 nm NIR laser irradiation was found to sterilize drug-resistant pathogens in vitro and to eliminate subcutaneous abscesses in vivo effectively. That is OK, thank you! The treatment of subcutaneous abscess caused by drug-resistant bacteria is facing great difficulties and receiving more attention. In this work, we employed BSA-CuS nanoparticles as a photothermal reagent to apply photothermal therapy (PTT) to combat drug-resistant bacteria in vitro and subcutaneous abscess in vivo . The BSA-CuS nanoparticles were found to be stable and biocompatible without cytotoxicity toward NIH3T3 and 4T1 cells. In vitro experiments showed that three species of drug-resistant pathogens, including Escherichia coli , Staphylococcus aureus , and Candida albicans , could be effectively sterilized under co-incubation with BSA-CuS nanoparticles and then irradiation with 1064 nm NIR laser via tissue penetration. BSA-CuS nanoparticles together with 1064 nm NIR laser irradiation could also effectively diminish subcutaneous abscesses caused by drug-resistant bacteria on mice under PTT and depth PTT without causing any serious side effects and organic damage in vivo .That is OK, thank you!
研究领域:
医学
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生物材料学
·
感染性疾病
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Hao-Nan Wang,Xin Chen,Rong Chen,Xun Zhu,Qiang Liao,Ding-Ding Ye,Biao Zhang,You-Xu Yu,Wei Zhang,Jin-Wang Li
High-performance photocathode development is critically important to improve the solar energy utilization. In this study, a highly-active visible-light responsive photocathode with the ternary hybrid CuS/Cu 2 O/Cu nanowires is proposed to enhance electron transfer via the nanowired and gradient band structure and thereby the solar energy utilization. The experimental results confirm the improved photoelectrochemical activity with the ternary hybrid CuS/Cu 2 O/Cu nanowired photocathode toward oxygen reduction reaction . Besides, a photocatalytic fuel cell with the ternary hybrid CuS/Cu 2 O/Cu nanowired photocathode is also developed for direct power generation accompanying with wastewater treatment . It is demonstrated that the ternary hybrid CuS/Cu 2 O/Cu nanowired photocathode shows promising perspective. This new photocathode can be employed not only for photocatalytic fuel cells but also for other photoelectrochemical systems.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 12
·2087
·
IF 5.719
Xinman Tu,Linhong Ge,Lamei Deng,Li Zhang
Metal sulfide is often utilized as a catalyzed material to form colorimetric response system for some heavy metal detection. While the aggregation effect and conventional morphology limited the catalyzed efficiency. Herein, a robust method based on morphology adjustment was proposed to improve the dispersibility and catalytic performance of CuS. The results demonstrated when the solvent ratio of ethylene glycol and dimethyl sulfoxide arrived at 3:1, it displayed an optimal structure which is like a patulous flower. Meanwhile, an optimal surface binding energy (ΔE) of 120.1 kcal/mol was obtained via theoretical calculation model. The flower-like structure caused a 2-fold increase in the catalytic level. Subsequently, the CuS was employed to make colorimetric detection of Cr(VI) in water. The assay results exhibited a linear range of the Cr(VI) from 60 to 340 nM, the limit of detection was 1.07 nM. In the practical tests for Qianhu lake water, the spiked recoveries were 93.6% and 104% with the RSD of 4.71% and 3.08%. Therefore, this CuS-based colorimetric method possesses a satisfactory application prospect for the Cr(VI) determination in water.Keywords:CuS;morphology adjustment;solvent ratio;Cr(VI);colorimetric detection
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 9
·4272-4282
·
IF 3.925
Yu Lei,Huiqi Wu,Jianfeng Ma,Hao Cheng,Sridhar Komarneni
Layered α-Fe2O3/CuS nanoflowers with abundant active sites were synthesized by a hydrothermal method. The heterogeneous composite catalyst of α-Fe2O3/CuS nanoflowers exhibited a remarkable degradation capacity of 97.8% within 25 min for the Orange II (OII) dye under visible light, which was attributed to the synergistic effect of Na2S2O8 to generate ˙SO4− and ˙OH radicals. The initial pH tests revealed that this system showed better adaptability for its application in a wider pH range (pH = 3–9). In addition, the degradation of different azo dyes such as methylene blue (MB), Orange G (OG) and malachite green (MG) was also studied under the same conditions. The catalyst was characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) to analyze its size, morphology, valence states of elements and chemical components. α-Fe2O3/CuS was further characterized using a vibrating sample magnetometer (VSM) and diffuse reflectance spectroscopy (DRS) to demonstrate its magnetic properties and light absorption capacity. Moreover, α-Fe2O3/CuS showed good recovery and reuse performance as a catalyst after four repeated cycles. A possible mechanism of degradation was proposed by quenching and ESR experiments, which revealed that the highly active species of ˙SO4−, ˙OH and ˙O2− enhanced the photocatalytic performance of the photocatalytic system.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Shuai Liu,Yang Meng,Chunlin Luo,Huiwen Zhu,Yunshen Song,Honglei Zhang,Tao Wu
The emergence of global warming issues has triggered the interest in producing carbon-neutral energy sources and fossil-based chemicals from affordable and renewable feedstocks (e.g., bio-ethanol). Herein, the synthesis of highly dispersed CuS/TiO 2 photothermal catalysts is reported for simultaneously converting ethanol into hydrogen and acetaldehyde under simulated sunlight. The catalyst achieved a hydrogen evolution rate of 51.61 mmol g −1 h −1 and an acetaldehyde production rate of 48.63 mmol g −1 h −1 , with a maximal acetaldehyde selectivity of 97% among carbon-containing products. Compared to pristine TiO 2 , the introduction of plasmonic CuS largely extended the light adsorption range and enhanced the photothermal performance, whilst the formation of heterojunction structure improved the charge transfer and separation efficiency. The density functional theory calculation results demonstrate that CuS/TiO 2 composite interfaces could significantly lower the activation energy of ethanol dehydrogenation reaction and improve hydrogen evolution reaction ability. This study provides deep insight into understanding and optimizing hot carrier dynamics in photothermal catalytic systems.
研究领域:
能源化学
·
催化材料科学
✓ 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）