Dissertation > Excellent graduate degree dissertation topics show

Synthesis, Characterization and Application of Functionalized Mesoporous Silicas

Author: ZhuYanFang
Tutor: ZhangZuo
School: Shantou University
Course: Applied Chemistry
Keywords: aimo-functionalized mesoporous silica Chromium(Ⅵ) trichloroethylene
CLC: O613.72
Type: Master's thesis
Year: 2006
Downloads: 376
Quote: 1
Read: Download Dissertation

Abstract


Functionalized mesoporous materials show a large BET surface area, controllable distributed pore sizes and a pore arrangement, thermal and mechanical stability, and featuring high functionality. These materials are known to be promising candidates for the use in electronic, chemical and biochnological industries, and biomedical fields. Resecently, the development of functionalized mesoporous matericals for adsorption the heavy metal ions has generated considerable interst of many researchers. In this thesis, we first state the synthesis, characterization and adsorption properties of amino-functionalized mesoporous silicas. Subsequently, we report the synthesis and application of nanoscale Fe/Ni. The main research work is as follows:1. The mesoporous silicas has been prepared by tetraethoxysilane （TEOS） using oil-in-water microemulsion template in the presence of cetyltrimethylammonium bromide （CTAB, as structure-directing agent） and 1,3,5-trimethylbenzene （TMB, as oil phase）. 3-Aminopropyl-triethoxysilane （ATES） was then added onto the interior surface via post-synthesis grafting. The prepared materials were characterized by SEM、 XRD、 FT—IR and nitrogen sorption. The results indicate that the amino-functionalized mesoporous silicas have not any long range ordering structure, whose diameters ranging from 1.5 to 7 nm （mean pore size: 3.3 nm） and the surface area is up to 562 m2/g. The animo functiomal groups have been successfully boned to the interior mesoporous surfaces.2. The study on the absorption capacity of Cr6+ showed that the amino groups played a main role to Cr6+ immobilization, the most absorption capacity can up to 2.32mM/g. The react balance time no more than 10 minutes; The adsorption capacity can be obviously improved by reducing pH of the solution. In addition, adsorbed Cr6+ can be readily recovered and re-utilized repeatedly through simple acid （HCL） treatment, the recycle is more than 90% of the initial activity. The metal ion adsorption capacity and reusability of the material makes it promising adsorbents for wastewater cleanup.3. Nanoscale Fe/Ni via wet chemistry was presented with mesoporous silica what has been prepared by oil-in-water microemulsion template. The materials have been characterized bySEM、 TEM and XPS. The results demonstrated that nanoscale Fe/Ni alloy distributed on the

Related Dissertations

  1. The Investigation on the Renal Injury and Effects on Oxidative Stress of Guinea Pigs Induced by Trichloroethylene,R363
  2. Study on Extraction Spectrophotometric Determinaion of Cr(Ⅵ), Ni(Ⅱ) and Zn(Ⅱ) in Aquous Two-Phase System and Its Application,O657.3
  3. Serological Proteome Analysis on Trichloroethylene-treated L-02 Liver Cells and the Expression Change of Rho GDIα,R595
  4. Determination of Chromium(VI) by Automatic Reference Reverse Flow Colorimetry and the Application in Leather Analysis,TS513
  5. Trichloroethylene Induced Cytotoxicity on Cultured Human Keretinocytes and Vitamin E’s Proctective Effect on It,R96
  6. Trichloroethylene-induced Mitochondrial Damage in Keratinocytes and Protective Effect of Ginkgo Biloba Extract,R131
  7. Using Iron Minerals Catalyzed Hydrogen Peroxide-sodium Persulfate to Remove Trichloroethylene in Groundwater,X523
  8. In Vitro Study of Trichloroethylene-induced Keratinocytes Damage and Protective Role of Vitamin E and Ginkgo Biloba Leaf Extracts,R751
  9. A Study on Trichloroethylene Degradation by Aerobic Cometabolism and Volatile Model,X132
  10. Preparation of Nanoscale Iron and Palladiumized Iron Particles and Their Application in Groundwater Remediation,X523
  11. Study on the Mechanisms and Susceptibility of Occupational Medicamentosa-alike Dermatitis Due to Trichloroethylene,R758.25
  12. Preparation of Polymer Coated Nanoiron Particles for Remediation of Contaminated Groundwater,TB383.1
  13. The Study on Dechlorination of Chlorinated Organic Compounds in Water by Ni/Fe Nanoparticles and with Assistance of Ultrasound,X703
  14. Properties of Silicon Nitride Thin Films Deposited by R.F Magnetron Sputtering,O613.72
  15. Study of the Size Control Technology of Silica Sol Prepared by Silicon Power Method,O613.72
  16. Study on Eu or Tb Doped Alkaline Earth Polysilicate Phosphors,O613.72
  17. Study of Biochemical Surface Modification of Porous Silicon,O613.72
  18. Preparation Characterization and Hydrogen Separation of Cobalt-doped Silica Memebranes,O613.72
  19. Study on Gas Doping Technology on Sillicon Single Crystal,O613.72
  20. Structural Transition of Silicon Dioxide, Carbon and Silicon under High Pressure and High Temperature,O613.72
  21. Study of Silicon Thin Films Deposited by Magnetron Sputtering,O613.72
  22. Atmospheric-pressure Plasma Chemical Vapor Deposition for Polycrystalline Silicon Preparation from SiCl4 and OES Diagnosis,O613.72

CLC: > Mathematical sciences and chemical > Chemistry > Inorganic Chemistry > Non-metallic elements and their compounds > Part Ⅳ family of non-metallic elements (carbon and silicon ) and its compounds > Si Si
© 2012 www.DissertationTopic.Net  Mobile