Dissertation > Excellent graduate degree dissertation topics show

Studies on Soft Cluster Template in the Synthesis of Cu-containing Nano/Submicro Particles

Author: ChenFangBo
Tutor: FangYun
School: Jiangnan University
Course: Applied Chemistry
Keywords: Sodium dodecyl sulfate Polyvinylpyrrolidone Bound micelle Cuprous oxide Hollow Submicrospheres Secondary self-assembly Copper nanoparticles Soft template
CLC: TB383.1
Type: Master's thesis
Year: 2007
Downloads: 62
Quote: 1
Read: Download Dissertation

Abstract


In this paper , the anionic surfactant sodium dodecyl sulfate (SDS) , and water - soluble non-ionic macromolecular polyvinyl pyrrolidone (PVP) is formed soft cluster object of study, by the surface tension method and fluorescence quenching technique study with interaction , exploration of copper ions form a soft cluster structure of copper ions in the presence of SDS and PVP . Surface tension experiment showed that the addition of copper ions SDS is still bound to the micelle form with PVP clusters role of γ-lgc CuSO4 -SDS -PVP system curve remains double the critical concentration characteristics . Copper ion concentration increased beneficial SDS clusters PVP chain , so that the decrease of the surface tension γ strengthening , while C1 c2 increases decreases . The amount of saturated cluster Γ ∞ than the the the saturated cluster set amount of [Γ ∞] with the increase in the concentration of copper ions increases. The steady-state fluorescence quenching experiments results show that the the bound micelle aggregation number Nb with SDS concentration increases with the increase in the concentration of copper ions and reduce . N2H4 · H2O as reductant , SDS-PVP Soft Template restore the the CuSO4 preparation hollow Cu2O Submicrospheres . XRD patterns were determined by the average particle diameter of 11 ~ 22 nm of the original level Cu2O nanograins constitute mainly of (111) crystal face orientation . SEM and TEM experiments show that the resulting 420 ~ 550 nm structured hollow Cu2O Submicrospheres . SDS-PVP clusters like double soft template structure model successfully explained and a self-assembled the original level Cu2O nanocrystals synthesized in the the SDS bound micelles heavy template in the template in the second tier of the PVP stereo bridging secondary self-assembled secondary the hollow Cu2O Asia microspheres . Experimental facts indicate that SDS-PVP composite system , only the cluster -like structure is dominant only capable of inducing a synthetic the tacticity hollow Cu2O Submicrospheres ; adjustment cSDS can regulation within a certain range of the particle diameter of the hollow Cu2O Submicrospheres wall thickness and morphology . N2H4 · H2O restore the CuSO4 preparation of copper nanoparticles as a reducing agent in the SDS-PVP Soft Template . TEM and XRD experiments showed that the product of the average particle size of 20 ± 3 nm copper nanoparticles showed a face-centered cubic (fcc) structure . Combined with UV-Vis experiments shows that only when the SDS and PVP form a soft clusters exhibit particle morphology , size , superior regulation scale uniformity , dispersion and shape consistent nanoparticles .

Related Dissertations

  1. Infrared spectroscopy surfactant aqueous two- phase system of,O647.2
  2. Synthesis and Characterization of Polyaniline Micro/nano Structure and Its Composites,TB383.1
  3. Purification of an Estrogen Receptor from Carp and the Interaction with Phthalic Acid Esters (PAEs),S917.4
  4. Electrical stimulation between tredecimguttatus proteomic analysis of venom,Q51
  5. Study on Preparation and Performance of Potocatalytic Degradation of Cuprous Oxide Powder and Film,TB383.2
  6. Preparation and Characterization of Three-Dimensionally Ordered Macroporous Cu2O Films,TB383.2
  7. Preparation and Properties of Water-Soluble Core-Materials Applied for RTM,TB332
  8. Studies on the Properties of Organized Assemblies in Mixtures of CTAB/SDS Surfactants System by Cyclic Voltammetry,O647.2
  9. Controllable Synthesis and Applications of Copper, Zinc-Based Micro/nanosemiconductors,TB383.1
  10. Preparation and Characterization of PVP/Fe3O4 Composite Nanofibers,TB383.1
  11. Preparation and Electromechanical Properties of Nafion-Metal Composites,TB333
  12. The Preparation and Characterization of CdS, ZnS and ZnXCd1-XS Nanomaterials,TB383.1
  13. A Study on the Molecular Motion and Charge Storage of PVP,O633.5
  14. Some Drugs Molecular Spectroscopy Studies,O657.3
  15. Preparation of Cuprous Oxide/Rectorite Nano-composite and Research of Photocatalysis Properties,X703.1
  16. Preparation of Polythene/Layered Double Hydrotalcide Nanocomposites,TB383.1
  17. Photocatalytic degradation of organic matter and the kinetics of,X53
  18. Control of the morphology and particle size of ultrafine cuprous oxide,TB383.1
  19. SDS / cyclohexane / n-butanol / water microemulsion system, the nature of the research and the synthesis of nanomaterials,TB383.1
  20. Study on Extraction and Putification of the Tatol Flavons in Puhuang and the Preparation of Solid Dispersion Tablet,R283
  21. The Study of Recovery of Cd2+ by an Electrolytic Process from the Concentrated Solution of Micellar Enhanced Ultrafiltration,X703

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