Nanomaterials
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2023
·Vol. 13
·期 7
·1260
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IF 5.3
Huanran Miao,Yanlong Wu,Cheng Zhou,Zhimao Yang,Chuncai Kong
The controlled growth of Cu2S nanoarrays was constructed by a facile two-step impregnation synthesis route. The as-synthesized Cu2S/CuO@Cu samples were precisely characterized in terms of surface morphology, phase, composition, and oxidation states. At the laser irradiation of 808 nm, Cu2S/CuO@Cu heated up to 106 °C from room temperature in 120 s, resulting in an excellent photothermal conversion performance. The Cu2S/CuO@Cu exhibited excellent cycling performance—sustaining the photothermal performance during five heating-cooling cycles. The finite difference time domain (FDTD) simulation of optical absorption and electric field distributions assured the accuracy and reliability of the developed experimental conditions for acquiring the best photothermal performance of Cu2S/CuO@Cu.Keywords:Cu2S nanoparticles;photothermal;FDTD
研究领域:
材料科学
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纳米技术
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
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IF 5.3
Guojun Ma,Jian Guan,Qiuyi Zhu,Ning Han,Yunfa Chen
In this work, a Cu2S monolithic catalyst with a nanosheet structure was prepared by treating copper foam with a liquid-phase vulcanization method. The surface of the catalyst was modified by a series of straightforward oxidation, reduction, and vulcanization processes, and in this way, the nanostructure was also changed from nanowires to granular and irregular nanosheets. This material can remove 100% of ozone at a concentration of 20 ppm and a gas hourly space velocity of 70,000 h–1, making it one of the best-reported performances among monolithic ozone decomposition catalysts. In situ diffuse reflectance infrared spectroscopy characterization was used to clarify the intermediate products in the ozone decomposition process, revealing the mechanism of sulfide semiconductor materials decomposing ozone. The liquid-phase vulcanization modification method reported in this work has universal applicability to other transition metal oxides and great potential for application in the field of the catalytic decomposition of harmful gas pollutants.
研究领域:
环境科学
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催化材料
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化学工程
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产品关联
DOI
高影响因子
Battery Energy
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2024
·
IF 9
Xiangchao Xu,Fen Qiao,Yanzhen Liu,Wenjie Liu
Cu(OH) 2 has the advantages of ease of structural regulation, good conductivity, and relatively low cost, making it a suitable candidate material for use as an electrocatalyst. However, its catalytic efficiency and stability still need to be improved further. Therefore, Cu(OH) 2 /Cu 2 S was successfully prepared on copper foam (CF) using the in situ growth and hydrothermal method. The structural characterization showed that sulfidation treatment induced transformation of Cu(OH) 2 /CF from smooth nanorods into a coral-like structure, which exposed more active sites of Cu(OH) 2 /Cu 2 S and enhanced the performance of electrocatalytic hydrogen evolution reaction (HER). Compared with Cu(OH) 2 , Cu(OH) 2 /Cu 2 S showed better alkaline HER performance, especially when the vulcanization concentration was 0.1 M, the overpotential of Cu(OH) 2 /Cu 2 S was 174 mV, and the reaction kinetics was 64 mv dec −1 at a current density of 10 mA cm −2 . In this work, the morphology and electronic structure of copper-based metal sulfide electrocatalysts were adjusted by sulfide treatment, which provided a new reference for improving HER performance.
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
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Xue Xu,Huile Jin,Qian Ren,Aili Liu,Jun Li,Dewu Yin,Xin Feng,Xiaomei Dong,Jichang Wang,Shun Wang
The focus of this study is to explore ways of accelerating the corrosion rate of copper anodes for the possible synthesis of copper nano-composites on the counter electrode, and the subsequent applications of such composites as nonenzymatic glucose sensor. Normally, a strong corrosion resistance of copper anodes emerges in alkaline solutions due to the formation of a passive copper hydroxide film, which prevents further corrosion. In this research the presence of sulfide ions in the electrolyte was found to dramatically promote the corrosion process and eventually led to the production of CuxO/Cu2S (where CuxO was consist of Cu2O and CuO) nanocomposites on the counter electrode during the electrochemical corrosion process. When the as-prepared copper nanocomposites electrodes were used to detect the oxidation of glucose, a strongly enhanced anodic process was obtained, in which the detection limit was found to be around 10 uM with a linear range of 10-1000 uM and a detection sensitivity of 2688 uA cm -2 mM -1 .
研究领域:
材料科学
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分析化学
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生物医学工程
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Shuyi Fu,Wenrui Feng,Ying Jia,Tielong Deng,Wenzhong Wang,Guling Zhang,Junli Fu
ZnO/Cu 2 S nanotube arrays are fabricated firstly by a facile and capping-agent-free method, and the photo-electrochemical performance has been studied systematically. The results show that ZnO/Cu 2 S nanotube arrays achieve enhanced photo-electrochemical water splitting performance and the photocurrent densities of ZnO/Cu 2 S are 7.9 times than that of ZnO at 0 V versus Ag/AgCl. The performance of the ZnO/Cu 2 S nanotube arrays can be adjusted by changing the amount of Cu 2 S microcrystals. The results confirm that the enhanced photo-electrochemical performance of ZnO/Cu 2 S is due to the significantly improved visible light absorption, effective separation of photo-induced carriers due to the well band energy match and the formed p-n junction between ZnO and Cu 2 S.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2019
·
IF 4.85
Xiao Shao,Tianyong Zhang,Bin Li,Minghao Zhou,Xiaoyuan Ma,Jingchao Wang,Shuang Jiang
Ligand-induced chirality in core/shell nanocrystals (NCs) has attracted extensive attention because of many valuable potential applications. However, the cause of chirality especially in semiconductor nanomaterials is still under debate despite the creation of chiral type I core/shell structures. Herein, we synthesized a kind of new Cu2S/CdSe core/shell nanostructure to study the underlying reason. Four samples of Cu2S/CdSe were synthesized utilizing successive ion layer adsorption and reaction to vary the thickness of the CdSe shell upon a Cu2S core with 5 nm diameter. The chirality of type II Cu2S/CdSe NCs is imparted by l-/d-cysteine and penicillamine, which could be modulated with an increasing thickness of the CdSe shell. To the best of our knowledge, this is the first report of chiral type II core/shell semiconductor NCs. The hybridization theory can explain the variation trend of g factors with every increase in shell thickness from four monolayers (4 ML) to 7 ML. The results indicate that the chiroptical activity of semiconductor NCs is mainly due to hybridization between the holes in the valence band of NCs and the highest occupied molecular orbitals of the chiral ligands. In addition, Cu2S/CdSe NCs show a better chiroptical intensity in comparison with the type I structure according to previous work. The first design of chiral type II Cu2S/CdSe core/shell NCs and a detailed investigation of chiral variation trend help to give a better understanding of the chiral interaction between ligands and core/shell semiconductor nanostructures.
研究领域:
纳米材料科学
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光学
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材料化学
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 26
·11042-11048
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IF 3.288
Yi Yang,Qiu Zhang,Fengyan Li,Zhinan Xia,Lin Xu
This paper reports for the first time the preparation of Co3O4 nanorods by simple hydrothermal and annealing methods, which are doped with polyoxometalates that act as an intermediary in electronic transmission to accelerate electron transport. The designed H3PW12O40(PW12)/Co3O4–Cu2S composite film was prepared by the screen printing method to boost its efficiency as the counter electrode for quantum dot-sensitized solar cells, where the preparation process is simple and inexpensive. PW12/Co3O4–Cu2S (Jsc = 16.60 mA cm−2, Voc = 0.636 V, Rct = 0.32 Ω and FF = 0.436) shows better electrocatalytic performance compared to the original Co3O4 and Cu2S. Accordingly, the photoelectric conversion efficiency of PW12/Co3O4–Cu2S is 4.67%, which is 10%, 46%, 55.6%, and 72% higher than those of Co3O4–Cu2S (4.2%), Cu2S (2.54%), PW12/Co3O4 (2.07%), and Co3O4 (1.30%), respectively. Electrochemical impedance spectroscopy and Tafel measurements performed on two CE symmetric virtual cells proved the excellent electrocatalytic activity of PW12/Co3O4–Cu2S. Therefore, this composite film can be used as an alternative option for QDSSC counter electrodes.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
Nanoscale
·
2013
·Vol. 5
·期 17
·8114-8121
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IF 6.233
Wei Zhang,Lanlan Zhai,Na He,Chao Zou,Xiaozhen Geng,Lujun Cheng,Youqing Dong,Shaoming Huang
Cu2ZnSnS4 is a promising solar absorbing material in solar cells due to its high absorption coefficient and abundance on earth. We have demonstrated that wurtzite Cu2ZnSnS4 nanoleaves could be synthesized through a facile solution-based method. Detailed investigation of the growth process indicates that α-Cu2S nanocrystals are first formed and then serve as a catalyst to introduce the Cu, Zn, and Sn species into the nanoleaf growth for fast ionic conduction. The structure of the as-synthesized nanoleaves is characterized by powder X-ray diffraction, high-resolution transmission electron microscopy, fast Fourier transform, and energy dispersive X-ray spectroscopy mapping. Photoresponses of Cu2ZnSnS4 nanoleaves are evaluated by I–V curves of a Cu2ZnSnS4 nanoleaf film. It is believed that the enhancement of the photoresponse current of the Cu2ZnSnS4 nanoleaf film can be attributed to fast carrier transport due to the single crystalline nature and enhanced light absorption resulting from larger absorption areas of the Cu2ZnSnS4 nanoleaves.
研究领域:
材料科学
·
太阳能电池研究
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DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2015
·
IF 4.762
Li An,Panpan Zhou,Jie Yin,He Liu,Fengjuan Chen,Hongyan Liu,Yaping Du,Pinxian Xi
The synthesis of semiconducting nanoplates (NPs) with defined crystal phase is of particular interest, especially their intriguing properties related to the size, shape, and crystal phase. Herein, a liquid-state transformation process from hexagonal-phase CuS NPs is employed to fabricate the cubic-phase Cu2S NPs. The CuS NPs were converted into Cu2S NPs but maintained the morphology. The Cu2S NPs exhibit better oxygen evolution reaction (OER) activity than CuS NPs. Furthermore, the OER activity of Cu2S NPs can be improved by the addition of a glycine (Gly) solution. The Cu2S NPs with Gly in a phosphate buffer solution exhibit excellent OER activity and durability, which approaches that of the best known commercial Ir/C (20%) nanocatalyst. In this work, a good strategy for fabricating a noble-metal-free OER catalyst has been proposed, which could provide insight into developing new water oxidation catalysts with high activity.
研究领域:
材料科学
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催化化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Qianghui Tian,Yuanyu Chen,Ze Yang,Haixia Zhang,Ying Hou,Junjie Guo
Transition metal sulfide heterostructures have demonstrated significant potential in enhancing the performance and cycling stability of supercapacitors due to their adjustable electronic structure. In this study, we synthesized an integrated electrode by constructing NiFeS 2 @Cu 2 S heterostructure nanorods onto a copper foam (CF) substrate. The heterostructure displays a crucial role in improving the electrochemical properties of the NiFeS 2 @Cu 2 S electrode, which exhibits a high specific capacity of 588 mAh g −1 at a current density of 1 A g −1 . Moreover, The assembled CF@NiFeS 2 @Cu 2 S //CF@AC asymmetric supercapacitor (ASC) delivers an impressive energy density of 68.6 Wh kg −1 at a power density of 800 W kg −1 . This work provides a novel strategy to design and construct highly efficient electrode materials for energy storage applications.
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
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yi Li,Yanghan Chen,Tao Chen,Guoqiang Shi,Lin Zhu,Ye Sun,Miao Yu
Ethanol (C2H5OH) is an economically ideal C2 product in electrochemical CO2 reduction. However, the CO2-to-C2H5OH conversion yield has been rather low and the underlying catalytic mechanism remains vague or unexplored in most cases. Herein, by decorating small Cu2S nanocrystals uniform ly on Cu nanosheets, three desirable features are integrated into the electrocatalyst, including a relatively high positive local charge on Cu (Cuδ+), abundant interfaces between Cuδ+ and zero-valence Cu0, and a non-flat, stepped catalyst surface, leading to the promoted affinity of *CO, decreased *COCO formation barrier, and thermodynamically preferred *CH2CHO-to-*CH3CHO conversion. As a result, a high partial current density of ∼20.7 mA cm–2 and a Faraday efficiency of 46% for C2H5OH are delivered at −1.2 V vs reversible hydrogen electrode in an H-cell containing a 0.1 M KHCO3 solution. This work proposes an efficient strategy for the high-yield CO2-to-C2H5OH conversion, emphasizing the promise for the industrial production of alcohol and related products from CO2.
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Cai-Wu Luo,Liang Jiang,Chao Xie,Deng-Gao Huang,Tian-Jiao Jiang
The copper-based materials were considered as promising catalysts for the activation of peroxydisulfate (PDS), but the study on the Cu 2 S-activated PDS under LED illumination and alkaline condition was little reported. In this work, Cu 2 S, a simple and readily available heterogeneous catalyst, was employed to enhance the activation of PDS under alkaline condition through LED illumination. The results indicated that under LED illumination, the degradation rate of tetracycline (TC) during the first 15 min was 3.55 times higher than that of the darkness. A series of important influencing factors were optimized, including anions, humic acid and complex water matrices. The results showed that the Cu 2 S/PDS/LED system exhibited excellent adaptability. Besides, the Cu 2 S maintained a good stability. The quenching experiments and electron spin resonance analysis demonstrated that the electron transfer and 1 O 2 were two primary pathways for the degradation of TC, and also other species such as SO 4 •- and •OH played important roles. Furthermore, X-ray photoelectron spectroscopy characterization and a series of experiments confirmed that the Cu + was the primary catalytic active site, while the S 2- could directly activate PDS and accelerate the cycles of Cu 2+ /Cu + . The toxicity test proved that the toxicity of TC decreased after the degradation. This study not only highlighted the potential of the Cu 2 S/PDS/LED system for efficient TC degradation under alkaline condition but also provided new insights for the development of Cu-based catalytic technologies.
研究领域:
环境科学
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催化材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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