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cu2+对香港牡蛎急性毒性和抗氧化酶活性的影响

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渔业研究 2025年

作者：蔡思灿吴汉亮张方琪黄东明栗志民广东海洋大学水产学院

【背景】香港牡蛎（Crassostrea hongkongensis）是一种肉质鲜美、营养价值丰富的经济贝类。21世纪以来，随着重金属排放日益增多，香港牡蛎的存活受到了极大的威胁。【目的】探究铜离子(cu2+)对香港牡蛎存活的影响。【方法】设置5个处... 详细信息

【背景】香港牡蛎（Crassostrea hongkongensis）是一种肉质鲜美、营养价值丰富的经济贝类。21世纪以来，随着重金属排放日益增多，香港牡蛎的存活受到了极大的威胁。【目的】探究铜离子(cu2+)对香港牡蛎存活的影响。【方法】设置5个处理组，cu2+浓度分别为40.00 、56.62、79.98、113.24和160.00 mg/L，开展96 h急性毒性试验，以及考察cu2+胁迫对香港牡蛎不同组织（外套膜、鳃、肝胰腺、生殖腺）过氧化氢酶（CAT）、总超氧化物歧化酶（T-SOD）、谷胱甘肽过氧化物酶（GSH-PX）和谷胱甘肽-S转移酶（GSH-ST）活性变化的影响。【结果】在cu2+胁迫下，香港牡蛎48、72、96 h的半致死浓度(LC50)分别为116.01、84.33、65.32 mg/L，安全浓度（SC）为0.65 mg/L。在cu2+胁迫96 h内，随着试验时间的的延长，cu2+对香港牡蛎不同组织的抗氧化酶活性均产生显著的影响（Pcu2+的敏感程度具有一定的组织特异性，该发现可作为cu2+浓度生态监测的重要依据。本试验结果可为香港牡蛎的健康养殖提供参考。

关键词：香港牡蛎 cu 急性毒性抗氧化酶

Synthesis of water-soluble cu nanoparticles and evaluation of their tribological properties and thermal conductivity as a water-based additive

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Friction 2019年第3期7卷 246-259页

作者： Junhua ZHAO Guangbin YANG Chunli ZHANG Yujuan ZHANG Shengmao ZHANG Pingyu ZHANG Engineering Research Center for Nanomaterials Henan University

Efficient and sustainable use of water-based lubricants is essential for energy ***,the use of water-lubricated mechanical systems instead of conventional oil lubricants is extremely attractive from the viewpoint of resource *** this study,water-soluble cu nanoparticles of size approximately 3 nm were prepared at room temperature(around 25 °C) via in-situ surface *** tribological behavior of the as-synthesized cu nanoparticles as an additive in distilled water was evaluated using a universal *** results show that the as-synthesized cu nanoparticles,as a water-based lubricant additive,can significantly improve the tribological properties of distilled *** particular,the lowest friction coefficient of 0.06 was obtained via lubrication with a concentration of 0.6 wt% of cu nanoparticles in distilled water,which is a reduction of 80.6% compared with that obtained via lubrication with distilled water *** is considered that some cu nanoparticles entered the contact area of the friction pairs to form a complex lubricating film and prevent direct contact of the friction ***,some cu nanoparticles in the solution accelerate the heat transfer process,which also results in good tribological properties.

关键词： cu nanoparticles water-soluble lubricant additive tribological properties

cu2O-templated fabrication of Ni(OH)2·0.75H2O hollow tubes for electrocatalytic oxygen evolution reaction

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Progress in Natural Science:Materials International 2022年第5期32卷 554-560页

作者： Yu Zhang Xueai Teng Zequn Ma Rongming Wang Woon-Ming Lau Aixian Shan Beijing Advanced Innovation Center for Materials Genome Engineering & Center for Green Innovation School of Mathematics and Physics University of Science and Technology Beijing Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science School of Mathematics and Physics University of Science and Technology Beijing Institute of Materials Science and Devices School of Materials Science and Engineering Suzhou University of Science and Technology Shunde Innovation School of University of Science and Technology Beijing

cu2O is an ideal template material for the preparation of transition metal hydroxide/oxyhydroxides with oxygen evolution reaction(OER) enhanced catalytic performance. Here, inspired by Pearson’s principle, cu2O wires were prepared and used as a sacrificial template to prepare Ni(OH)2·0.75H2O hollow tubes(Ni(OH)2HTs) with highly improved surface roughness. Benefiting from unique structural advantages, the Ni(OH)2HTs showed excellent catalytic activity, rapid kinetics and a long-term stability as the OER catalyst, where an overpotential of only 207mV was required to drive a current density of 10 mA cm-2, an ideal kinetics with a Tafel slope as 79.8 mV dec-1was calculated, and no obvious attenuation in chronoamperometry was discovered after operation for 24 h. This paper provides a novel template-assisted strategy to prepare high-performance transition metal-based OER catalysts possessing hollow and tubular structures.

关键词： Ni(OH) 2 hollow tube cu 2 O wire Template One-dimensional hollow structure Oxygen evolution reaction

Application of the Embedded-atom Method to Liquid Binary cu-Ni Alloys

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Journal of Materials Science & Technology 1997年第2期13卷 117-122页

作者： Hongbo LIU Kuiying CHEN Zhuangqi HU (State Key Lab. of RSA, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, China)Geying AN(School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China) State Key Lab. of RSA Institute of Metal Research Chinese Academy of Sciences Shenyang 110015 China School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China

A simple analytic embedded-atom model of monoatoms that includes more than nearest neighbours has been extended to study properties of binary liquid cu-Ni alloys, here the two-body potential between different species of atoms is taken as a function of the two-body potential for the pure metals with a unique form which yields alloy models with the same invariance to electron density transformations as monoatomic models. Faber-Ziman structure factors have been computed by molecular dynamics simulation on the base of this model. The results are in good agreement with experimental data given by Waseda, thus supporting the overall validity of the approach, especially for cross potential of cu-Ni pair. Further, a detailed description of structure of binary liquid cu-Ni alloys with different compositions have been performed using pair analysis and bond orientational order method etc., and then the chemical short range order has also been examined to reveal the structural characterization.

关键词： Rev Li Application of the Embedded-atom Method to Liquid Binary cu-Ni Alloys cu Ni

Fabrication and Photocatalytic Activity of cu_2O Nanobelts on Nanoporous cu Substrate

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Acta Metallurgica Sinica(English Letters) 2019年第1期32卷 63-73页

作者： Yun Li Chuan Ji Yu-Chen Chi Zhen-Hua Dan Hai-Feng Zhang Feng-Xiang Qin School of Materials Science and Engineering Nanjing University of Science and Technology College of Materials Science and Engineering Nanjing Tech University Shengyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Science

In this paper, we report the fabrication of the photocatalysts composed of cu_2O nanobelts and nanoporous cu(NP cu)substrate, which is obtained by soaking the NP cu in dehydrated ethanol. The NP cu substrate is achieved by dealloying of Ti_(40.6)Zr_(9.4)cu_(40.6)Ni_(6.3)Sn_(3.1) amorphous ribbons in HF solutions. The dealloying process is considered to be a thermally activated process, obeying the Arrhenius law. The surface diffusivity increases with increasing dealloying temperature and concentration of HF solutions. The activation energy of the diffusion of cu adatoms is estimated to be 76.4 kJ/mol. The cu_2O nanobelts with the width of 10–15 nm and the length of about 1 lm are formed on the surface of NP cu after immersion in dehydrated ethanol. The photocatalysts of cu_2O on nanoporous cu exhibit superior photocatalytic activity toward the degradation of methyl orange and methylene blue under the irradiation of the sunlight due to the coexistence of cu_2O semiconductor nanobelts and large amount of heterojunctions as flowing path for photoelectrons.

关键词： Nanoporous cu Dealloying cu2O Photocatalytic activity

Optimization of mechanical property, antibacterial property and corrosion resistance of Ti-cu alloy for dental implant

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Journal of Materials Science & Technology 2019年第10期35卷 2336-2344页

作者： Jiewen Wang Shuyuan Zhang Ziqing Sun Hai Wang Ling Ren Ke Yang School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China

Ti-cu alloys with different cu contents(3, 5 and 7 wt%) were fabricated and studied as novel antibacterial biomaterials for dental application. The Ti-cu alloys were annealing treated at different temperatures(740℃, 830℃ and 910℃) in order to obtain three typical microstructures, β-Ti + Ti2cu, β-Ti + transformed α-Ti, and transformed α-Ti. Mechanical, antibacterial and biocorrosion properties of Ti-cu alloys with different microstructures were well analyzed by scanning electron microscopy(SEM),X-ray diffraction(XRD), transmission electron microscopy(TEM), tensile test, electrochemical test and antibacterial test. The results indicated that the Ti-cu alloys with microstructure of β-Ti + Ti2 cu showed the best ductility compared with other Ti-cu alloys with microstructures of β-Ti + transformed α-Ti and complete transformed α-Ti, and meanwhile, increase of the cu content significantly contributed to the decreased ductility due to the increasing amount of Ti2 cu, which brought both solid solution strengthening and precipitation strengthening. Finally, the Ti-5 cu alloy with microstructure of β-Ti + Ti2 cu exhibited excellent ductility, antibacterial property and corrosion resistance, providing a great potential in clinical application for dental implants.

关键词： Ti-cu alloy Ti2cu Microstructure cu contents Optimization

Meso-macroporous Fe-doped cu O: Synthesis, characterization, and structurally enhanced adsorption and visible-light photocatalytic activity

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Journal of Central South University 2015年第11期22卷 4105-4111页

作者：朱剑飞肖奇 Department of Inorganic Materials School of Resources Processing and BioengineeringCentral South University

The meso-macroporous Fe-doped cu O was prepared by a simple hydrothermal method combined with post-annealing. The samples were characterized by X-ray powder diffraction(XRD), scanning electron microscopy(SEM), Brunauer-Emmett-Teller N2 adsorption-desorption analyses and UV-vis diffuses reflectance spectroscopy. The Fe-doped cu O sample shows higher adsorption capacity and photocatalytic activity for xanthate degradation than pure cu O under visible light irradiation. In addition, the adsorption process is found to fit Langmuir isotherms and pseudo-second-order kinetics. The the first order kinetic Langmuir Hinshelwood model was used to study the reaction kinetics of photocatalytic degradation, and the apparent rate constant( k) was calculated. The value of k for Fe-doped cu O is 1.5 times that of pure cu O. The higher photocatalytic activity of Fe-doped cu O is attributed to higher specific surface area together with stronger visible light absorption.

关键词： meso-macroporous Fe-doped cu O adsorption photocat

Thermal Conductance of cu and Carbon Nanotube Interface Enhanced by a Graphene Layer

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Chinese Physics Letters 2015年第8期32卷 120-122页

作者：黄正兴王立莹白素媛唐祯安 School of Electronic Science and Technology Dalian University of Technology Dalian 116024 School of Physics and Electronic Technology Liaoning Normal University Dalian 116029

Thermal conduetances between cu and graphene covered carbon nanotubes （gCNTs） are calculated by molecular dynamics simulations. The results show that the thermal conductance is about ten times larger than that of cu- CNT interface. The enhanced thermal conductance is due to the larger contact area introduced by the graphene layer and the stronger thermal transfer ability of the cu-gCNT interface. From the linear increasing thermal conductance with the increasing total contact area, an effective contact area of such an interface can be defined.

关键词： Thermal Conductance of cu and Carbon Nanotube Interface Enhanced by a Graphene Layer cu

Calculation of the Surface Segregation of cu-0.3 at. pct Au Alloy

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Journal of Materials Science & Technology 2000年第6期16卷 639-640页

作者： Liping ZHENG and Risheng LI (International Center for Material Physics, Chinese Academy of Sciences, Shenyang 110015, China) Yuanxun ZHANG and Shi QIU (Shanghai Institute of Nuclear Research, Chinese Academy of Sciences, Shanghai 201800, China) Bingyao JI Int. Cent. for Material Phys. Chinese Acad. of Sci. Shenyang 110015 China

Monte Carlo simulation technique with the energetics described by the embedded atom method has been used to calculate the surface segregation of cu-0.3 at. pct Au alloy at T=800 K. It is found that the component Au in... 详细信息

关键词： cu Calculation of the Surface Segregation of cu-0.3 at pct Au Alloy