Dissertation > Excellent graduate degree dissertation topics show

Study of Preparation of Nanometer-Scale Metal Oxides by Homogeneous Precipitation Method

Author: WuDi
Tutor: LuoFang；WangEnBo
School: Northeast Normal University
Course: Inorganic Chemistry
Keywords: Homogeneous Precipitation Nonionic Surfactant Triton X-100 Electrochemical Corrosion Cu2O CuO
CLC: TB383.1
Type: Master's thesis
Year: 2006
Downloads: 304
Quote: 0
Read: Download Dissertation

Abstract


Nanotechnology is a high and new technology, which has been developing from its birth at the endof the 1980s.The preparation of nanomaterials is an important part of nanotechnology. Because of its wideprospective applications in the filed of chemical industry catalysis, fine chinaware, irradiance parts of anapparatus, absorbance of IR, photoconductive materials, magnetism, metal oxide nanomaterials have beenpaying more and more attentions. The preparation of uniform metal oxide nanomaterials by homogeneousprecipitation method in solution is an active field in current material science.In this paper, copper-based metal oxide nanomaterials were prepared in solution to investigate thetwo key problems of homogeneous precipitation—how to provide precipitator continuously in a lowconcentration by chemical method, and how to prevent from the aggregation of primary nanoparticles.Triton X-100, which is a nonionic surfactant, was used as capping agent to prepare Cu2O nanomaterial inthe process of Cu（II） cations hydrolysis in organic solution. Uniform single crystal nanotubes with outerdiameters of about 20 nm, inner diameters of about 10 nm and lengths of about 120 nm were prepared.Using the “soft templates” formed by Triton X-100 molecule aggregates, uniform Cu2O nanocube andhollow cube polycrystals with lengths of about 180 nm were synthesized. Modulating the amount ofethanol additives, the size of hollow structure can be controlled. Using deionized water as solutionmedium and copper foils as electrodes, pure and monodisperse CuO shuttle-like particles with length ofabout 200 nm consist of parallel nanowires with diameters of 3-5 nm were obtained in the process ofelectrochemical corrosion under low potentials. The regular morphologies of anode films composed ofuniform CuO nanoparticles were also obtained in the corrosion process under different temperatures andcurrent densities. The co-discharge of oxygen and Cu（II） cations was realized on cathode under lowcurrent densities by controlling the concentration of soluble oxygen, and the dense films composed ofuniform Cu2O cubes with length of about 900 nm were obtained. The uniform FeOOH、Ni（OH）2、ZnOnanoparticles were also prepared in the same corrosion process using Fe、Ni、Zn as electrodesrespectively.X-ray powder diffraction（XRD）、transmission electron microscopy（TEM） and scanning electronmicroscope（SEM） were applied to characterize the compositions and morphologies of the products.

Related Dissertations

  1. Efficient Oxidative Degradation of 2,4-dichlorophenol Over Supported CuO-based Catalysts,X703
  2. Study on the Preparation of Cu-Sn Co-doped Nino-Titanium Dioxide and Its Photocatalytic Property,O643.36
  3. Preparation and Properties of Rare Earth Sesquisulfides,O611.4
  4. Effects of the CuO on the BaTiO3-based PTC Ceramics,TM28
  5. Preparation and Luminescence Characteristics of Eu-doped Nanocrystalline Zinc Oxide,TB383.1
  6. Synthesis and Electrochemical Performance of Zinc Sulfide Anode Material for Lithium-Ion Batteries,TM912
  7. Process Study on High-Sulfur and High-arsenic Refractory Gold Concentrate Nitrate Leaching Liguid Purification and Preparation of Nano Iron Oxide,TB383.1
  8. Preparation of Hydrotalcite and Research on Adsorption Capacity,O611.3
  9. The Preparation and Performance Characterization of (Sb, Ta, Li) Modified Alkali Metal-Containing Niobate-Based Piezoceramics,TM282
  10. The Studies on the Properties of the ZnO Based p/n Heterojunction Devices,TN304
  11. Preparation and Properties of Nano Oxides,TB383
  12. Nanometer copper oxide , cuprous oxide , Preparation and properties of,TB383
  13. Preparation and Performance Investigation of Cu2O Nanostructures,TB383.1
  14. First-principles Study of CuO-based and CdS-based Molecular and Solids Compounds,TB383.1
  15. Studies on the Characterization and the Properties of CuO-MnxOy/γ-Al2O3 Catalyst for NO Catalytic Reduction,O643.36
  16. Preparation and Characterization of PMMA / PAN precursor of carbon nanotubes,O631.3
  17. Preparation and Application of Cu2O Nano Composite Film,TB43
  18. Study on Performance and Fabrication of Organic Thin Film Transistors,TN321.5
  19. Studies on Preparation and Catalysis Performance of the CuO/ZnO/Al2O3 Catalyst for Liquid-phase Methanol Synthesis System,TQ223.121
  20. Study on the Synthetic Process of Titanium Silicalite and Its Catalytic and Oxidative Performance,O643.3
  21. Theoretical Study on the Infrared Absorption Spectrum and Cu-O Bond Vibration、Energy of CuO2 Plane of Bi-System High Temperature Superconductor,TM26

CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Special structural materials
© 2012 www.DissertationTopic.Net  Mobile