JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Jinhua Wang,Qiong Zhu,Yunwen Liao,Hongquan Fu,Jinming Chang,Yuling Zhang,Taotao Kan,Hejun Gao,Wenchao Huang
Nano-CuO have been grown on the surface of CdS nanorods by a simple solution-phase reaction, which greatly enhanced the hydrogen evolution ability of CdS. The physical chemistry properties of CuO/CdS nanocomposites were investigated by XRD, SEM, TEM, BET, XPS and electrochemical methods. The morphology and crystal structure of CdS were not influenced by the loading of Nano-CuO. And it was helpful to delay the time of electron recombination to the hole, and greatly improved the hydrogen evolution performance of CdS. When the loading of Nano-CuO was 1 wt%, the photocatalytic performance of CdS increases from 105 μmol g −1 h −1 to 3317.5 μmol g −1 h −1 . After several cycles, the structure of CuO/CdS nanocomposites was not changed, and Nano-CuO could effectively prevent the photo-corrosion defects of CdS. This work provides a new way to improve the hydrogen evolution performance of CdS by growing nano-oxide on CdS surface.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
Journal of Advanced Dielectrics
·
2014
·
IF 0
Juan Li,Renli Fu,Yue Xu,Zhenxiao Fu,Hongjuan Su
The TiO 2 ceramics doped with nano CuO were fabricated by the conventional solid-state reaction method. The crystal structure, microstructure, microwave dielectric properties and lattice vibrations of TiO 2 ceramics doped with nano CuO have been investigated. Nano CuO with higher sintering capability worked as flux former and effectively improved the sintering process of TiO 2 ceramics. The microwave dielectric properties of TiO 2 doped with nano CuO were much better than that doped with micron CuO at the same doping content. Raman spectra showed that the full width at half maximum of E g mode of TiO 2 doped with micron CuO was larger than nano CuO doped ones, which indicated a poor crystalline and a short phonon lifetime. TiO 2 doped with 1 wt.% nano CuO , sintered at 950°C for 2 h had compact and homogeneous microstructure and possessed the following dielectric properties: ε r = 106, Q × f = 24808, τ f = 371 ppm/°C.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
·
2024
·
IF 2.3
Boren Xu,Chunwang Yi
In this work, by simply using barium hydroxide (Ba(OH)2·8H2O) to react with cupric(II) sulfate pentahydrate (CuSO4.5H2O) in methanol under room temperatures, cupric oxide and barium sulfate co-precipitates (CuO@BaSO4) were one-step prepared, and the methanol can be recycled after separating the co-precipitates. The CuO@BaSO4 co-precipitates were then blended with polyamide 6 (PA6) to prepare PA6-CuO@BaSO4 composites and composites fiber via melt extrusion and melt spinning methods to improve the mechanic and antibacterial properties synchronously. The as-prepared CuO@BaSO4 co-precipitates have a regular size of 30–50 nm and are highly compatible with the PA6 matrix. Further investigations disclosed that the CuO@BaSO4 co-precipitates had a good dispersion in the PA6 matrix and synchronously improved the mechanical properties and thermal stability. What’s more, the PA6-CuO@BaSO4 composites showed excellent antibacterial performance and high spinnability. The bactericidal rate reached 100% when adding tiny content (0.24 wt%) of Cu2+ into PA6 fibers.
研究领域:
材料科学
·
高分子化学
·
生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 25
·11609-11621
·
IF 3.553
Wang Wei,Peng Rui,Liu Jiali,Wang Zhenzhen,Guo Tao,Liang Qisheng,Carrier Andrew J.,Wang Li,Zhang Xu
Herein, we constructed a nano-CuO film on copper foil for the in situ generation of reactive chlorine species (RCS) for the contact killing of bacteria and biofilm suppression and dispersal. Both Staphylococcus aureus and Escherichia coli were susceptible to this treatment . Additionally, we demonstrate the solid nano-CuO interface-based heterogeneous Fenton chemistry rather than leached copper-ion-based homogeneous Fenton chemistry is responsible for RCS generation and bacterial cytotoxicity. This process is modulated by the H 2 O 2 and Cl − concentrations in bacterial growth environment. The potential applications for in situ generation of RCS might be the incorporation of CuO nanoparticles into functional food contact surfaces as well as coating materials for marine biofouling control.
研究领域:
微生物学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2011
·
IF 3.65
Qin Hao,Houyi Ma,Zhicheng Ju,Guangda Li,Xiaowei Li,Liqiang Xu,Yitai Qian
LiCoO 2 nanoparticles were prepared through a sol–gel method, and then appropriate amount of CuO nanoparticles were deposited onto their surfaces to improve their cycling performances. It is found that the CuO coated sample has the capacity retention higher than 90% at the rates below 30 C after 10 cycles, which also has the highest capacities of 135 and 123 mAh g −1 at 40 C (5480 mA g −1 ) and 50 C (6850 mA g −1 ), respectively. The cyclic voltammograms result reveals that the CuO coating reduces the polarization and improves the electrochemical activity of cathode. In addition, experimental results indicate that CuO coating plays an important role in reducing the charge transfer resistance of the cell during cycling, which has been demonstrated by the electrochemistry impedance spectroscopy analysis. The above data indicate the potential application of CuO coated LiCoO 2 in high power field.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Nanomedicine
·
2018
·
IF 5.005
Yahui Zhang,Lin Wang,Xiang Xu,Fang Li,Qingsheng Wu
Aim: The combined efficacy of CuO nanoparticles (NPs) with 22 kinds of antibiotics against Escherichia coli was systematic studied, and CuO with cephalexin synergistic system was screened out. Methods: Antimicrobial susceptibility test included disk diffusion test, checkerboard method and time-kill assay. The interactions of CuO NPs and antibiotics were analyzed by x-ray photoelectron spectroscopy, Fourier transform infrared spectra and Zeta. The interactions between bacteria and antibacterial agents were studied by surface plasmon resonance sensor for the first time. Results & Conclusion: Synergistic effect (1+1>2) was observed when CuO NPs combined with cephalexin against E. coli. The concentrated cephalexin molecules interacted more strongly with the E. coli cells to make cell wall become loose. Then, CuO NPs were more easily to damage and penetrate cells. Besides, the presence of antibiotics did not enhance Cu2+ release, Cu2+ uptake and reactive oxygen species generation. But the presence of cephalexin greatly enhanced cell permeability in comparison to others.
研究领域:
微生物学
·
药理学
·
纳米医学
✓ 已验证
DOI
高影响因子
SENSORS
·
2019
·Vol. 20
·期 1
·140
·
IF 3.031
Yaqi Lu,Dan Wu,Ziyin Li,Quanjie Lin,Xiuling Ma,Zhangjing Zhang,Shengchang Xiang
It very important to be able to efficiently detect hydrazine hydrate in an aqueous medium due to its high toxicity. Here, we have proposed a new idea: to construct a sensor for the rapid determination of hydrazine hydrate based on the nano-CuO derived by controlled pyrolysis of HKUST-1 [Cu3(BTC)2(H2O)3]. The as-prepared CuO at 400 °C possesses a uniform appearance with nano-structure via SEM images, and the nano-CuO-400 has exhibited excellent electrocatalytic activity towards hydrazine oxidation. Amperometrici-tcurves shows the peak current as linearly proportional to the hydrazine concentration within 1.98–169.3 μmol L−1and 232–2096 μmol L−1with the detection limit of 2.55 × 10−8mol L−1and 7.01 × 10−8mol L−1, respectively. Moreover, the sensor constructed in the experiment shows good selectivities, and it is feasible to determining actual water samples.
研究领域:
分析化学
·
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Rumin Fu,Cairong Xiao,Zhekun Zhang,Kunyu Ren,Zhengnan Zhou,Zhengao Wang,Chengyun Ning,Chunlin Deng,Lei Zhou,Peng Yu,Xiaolan Wang,Guoxin Tan
Ceramic-based materials are widely used as dental restorative materials due to their excellent corrosion resistance and low shrinkage. However, the pathogenicity caused by abnormal adhesion and colonization of these dental restorative materials by bacteria in the oral cavity significantly affects the restorative results. Therefore, we report an efficient anti-Streptococcus mutans ( S. mutans ) ceramic material achieved by introducing small copper oxide nanoparticles into the sodium aluminosilicate ceramic material. Our results show that the composite ceramic can efficiently kill S. mutans (up to 99.99% antibacterial rate) and has excellent biocompatibility. By examining copper ion release assay, SEM observation, MTT, total protein, and DNA content after co-culture of bacteria, we speculate that copper ions in the composite ceramic disrupt the permeability of S. mutans membrane, affect the respiratory system of bacteria, and disrupt DNA proliferation thereby affecting the regular life activity of bacteria and eventually killing S. mutans . Based on our work, it is feasible to develop an efficient antimicrobial material for restorative dentistry by introducing copper ions into the ceramic materials, providing a new perspective for designing high-performance antimicrobial dental restorative materials.
研究领域:
牙科学
·
材料科学
·
细菌学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9
Bo Xu,Zhengcai Zhu,Silin Yang,Haiyan Yang,Jing Yang,Zhengjun Shi,Dawei Wang
Regulating the surface charge of biochar is crucial for its catalytic performance and adsorption capability. Here, Cu 2+ and melamine (Me) modified pomegranate peel powder (Cu-Me-PP) was prepared by coordination self-assembly method using waste pomegranate peel as the raw material. Then, nano-CuO and N-graphite doped biochar (CuO-N-PC) with positively charged surfaces were successfully prepared by pyrolysis of Cu-Me-PP and valence state regulation. The CuO-N-PC-300/ peroxymonosulfate (PMS) system could completely degrade the chloroquine phosphate (CQ) antibiotic within 30 min. Moreover, the effects of catalyst dosage, PMS dosage, solution pH, CQ concentration, and coexisting ions on the degradation efficiency of CQ were studied. It was found that CuO-N-PC-300 could not only catalyze the degradation of CQ but also remove 86.8 % of the phosphorus in the solution via electrostatic adsorption. Zeta potential analyses and molecular electrostatic potential calculations revealed that the electrostatic adsorption between the positively charged biochar and PO 4 3− were the key factors for the recovery of phosphorus. Electrochemical analyses, quenching experiments, electron paramagnetic resonance (EPR) tests, and DFT calculations were employed to explore the potential activation mechanism of PMS. Both interfacial electron transfer and the Cu 2+ /Cu + redox reaction were important pathways for activating PMS, generating a large number of •OH and 1 O 2 during the degradation of CQ. Finally, two degradation pathways of CQ were proposed based on LC-MS analysis, and the ecological toxicity was evaluated. This work provided an efficient method for the activation of PMS and the recovery of phosphorus by constructing positively charged nano-CuO sites on the surface of biochar.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2025
·
IF 5.2
Yue Zhang,Jinli Li,Yaya Jia,Linzhe Wang,Kang Wu,Shan Liu,Bing Liu
Solar salt (SS), serving as both a thermal energy storage (TES) material and heat transfer fluid (HTF), plays a critical role in determining the overall efficiency of concentrating solar power (CSP) plants through its thermophysical properties. Thus, a high-temperature static melting method and ultrasonic aqueous solution method was used to prepare nano CuO-SS nanocomposites for investigating the thermal properties improvement of SS by two different particle sizes of nano CuO (40 nm and 100 nm). The liquid specific heat capacity (c p ) appeared a trend of first increasing and then decreasing with the addition of nano CuO. It was 1.99 J/(g·K) and 1.81 J/(g·K) when the two nano CuO content was both 1.5 wt% in two system, and there was an increase of 28.39 % (nanocomposite CuO1-SS-4 of CuO1-SS system, Cu1SS-4) and 16.77 % (nanocomposite of CuO2-SS system, Cu2SS-4) compared with the pure SS respectively. The nanocomposites Cu1SS-4/Cu2SS-4 maintained excellent thermal stability, showing no change in their working temperature range compared to pure SS. The uniform dispersion of nano CuO particles was confirmed through scanning electron microscopy (SEM) characterization. The superior heat storage capacity results from the greater surface area and higher surface energy of smaller nano CuO, which facilitated more efficient thermal energy storage in the system. It had increasement of 47.25 % and 56.04 % about thermal conductivity of nanocomposite Cu1SS-4 and Cu2SS-4. The nitrate-based nanocomposite as a promising candidate material for thermal energy storage, due to its high heat storage, excellent chemical compatibility, large suitable working temperature and high thermal stability.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Aiyun Guo,Qixing Zhou,Yanyu Bao,Fanghan Qian,Xu Zhou
Conjugative plasmid transfer is a major contributor to the spread of antibiotic resistance genes (ARGs). However, the role of conventional fungicides on conjugative plasmid transfer has been neglected. Based on the condition that the increasing use of the combination of nano- and conventional fungicides will lead to combined contamination, the effects of a conventional fungicide prochloraz alone or in combination with nano-CuO on the conjugation of plasmid RP4 between Escherichia coli in phosphate-buffered saline were investigated in this study. The results demonstrated that 50 µg/L prochloraz alone significantly increased the conjugative transfer by 1.82 folds. The combination of 100 µg/L nano-CuO and prochloraz at 5, 50, and 500 µg/L significantly increased the conjugation by 2.56, 3.61, and 2.13 folds, respectively. The promotion of conjugative transfer of ARGs mediated by fungicides is mainly attributed to (i) the increased cell membrane permeability, (ii) the increased cell adhesion via enhancing the synthesis of polysaccharides in extracellular polymeric substances, and (iii) the up-regulation of the genes relevant to conjugation, oxidative stress, SOS response, outer membrane, polysaccharide export, intercellular adhesion, and ATP synthesis. Our findings provide evidence for the contribution of fungicides to ARGs transfer, which is significant to control the risk of ARGs dissemination.
研究领域:
微生物学
·
环境科学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
ChemNanoMat
·
2022
·Vol. 8
·期 6
·e202200118
·
IF 3.82
Zhe Shi,Changsheng Tang,Yidong Xu,Yinghui Hu,Jian Zhang,Zhaoyang Zhu,Jian Zheng,Ruiqing Fan,Debin Xia,Yulin Yang
Graphical In this study, n-CuO-X/g-C 3 N 4 composites have been synthesized and were applied for catalyzing AP thermal decomposition. The generated n-CuO/g-C 3 N 4 composites were the excellent catalyst for AP-based composite solid propellants to improve their decomposition efficiency and energy output. The thermal decomposition mechanism of AP was investigated and n-CuO-X/g-C 3 N 4 composites could effectively change the thermal decomposition path of AP and significantly inhibited the conversion of N 2 O to NO during decomposition, thus increasing the apparent heat release of AP decomposition. Enhancing the exothermic decomposition of ammonium perchlorate (AP) is of great significance to obtain solid propellants with excellent combustion performance. Herein, we prepared a series of composites for catalyzing the exothermic decomposition of AP by a facile method with different masses of nano copper oxide (n-CuO) dispersed in graphene-nitride carbon (g-C 3 N 4 ) nanosheets. Among them, n-CuO-8/g-C 3 N 4 showed the best catalytic activity, which reduced the high-temperature decomposition (HTD) value by 95.0 °C, and increased the total heat release by 505 J ⋅ g −1 . The n-CuO-12/g-C 3 N 4 also reduced the activation energy ( E a ) of the HTD stage by 47.34 kJ ⋅ mol −1 . The catalytic mechanism study suggested that the n-CuO-X/g-C 3 N 4 composites promoted the transition of electrons (e − ) and holes (h + ) from ClO 4 − to NH 4 + and inhibited the recombination of e − and h + , which further enhanced the exothermic decomposition of AP. During decomposition, the transformation of N 2 O to NO was significantly inhibited by the n-CuO-X/g-C 3 N 4 composites, thus increasing the integral heat release as evidenced by Real-time thermogravimetry/Fourier transform infrared spectroscopy. This study illustrated that n-CuO-X/g-C 3 N 4 composites are catalysts for the efficient decomposition of AP, which further enhance the energy performance of solid propellants.
研究领域:
材料科学
·
燃烧与推进
✓ 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）