Dissertation > Excellent graduate degree dissertation topics show

The Preparation and Research of Magnetically Separable TiO2 Photocatalyst Nanofibers

Author: ZhangLianLian
Tutor: LiCongJu
School: Beijing Institute of Clothing Technology
Course: Materials Science
Keywords: Electrospinning TiO2 Nanofiber Nanospheres Magnetism Photocatalysis
CLC: TB383.1
Type: Master's thesis
Year: 2012
Downloads: 13
Quote: 0
Read: Download Dissertation

Abstract


Sr1-xLaxFe12-xCoxO19(x=00.5) ferrite nanofibers were successfully abtained by electrospinning technique. The samples, morphology, phases, structure and magnetic properties of the nanofibers were characterized by Scanning electron microscopy(SEM), Transmission electron microscope(TEM), X-ray diffraction(XRD) and Vibrating sample magnetometer(VSM). The results show that the samples have an uniform diameter of 80150 nm after being calcined at 800 oC. The substitution of La3+ and Co2+ obviously increases the magnetic properties of the as-prepared samples at x≤0.1, the coercivity(Hc) and remanent magnetization(Mr) of Sr0.9La0.1Fe11.9Co0.1O19 nanofiers correspondingly are 432.02 kA/m, 28.9 A·m2/kg, which were much enhanced compared to the Sr0.9La0.1Fe11.9Co0.1O19 powder sample.TiO2/Mn2O3 nanofibers were abtained by electrospinning methods. The TiO2/Mn2O3 nanofibers were characterized by SEM, TG-DTA, XRD and UV-Vis spectrophotometer. The results showed that it can be produced into TiO2/Mn2O3 nanofibers with a small diameter of 100 nm after calcination at 500°C. The incorporation of Mn2O3 into titania dioxide can significantly extend the absorption by the photocatalysts into visible range.On the base of above research, magnetically separable photocatalysis materials, La3+-TiO2/CoFe2O4 nanofibers and TiO2/SrFe12O19 nanospheres, were obtained by means of a novel two-spinneret electrospinning technique and sol-gel method. The photocatalysis materials were characterized by XRD、SEM、TEM and VSM respectively. The results show that, the <1.0% La-doped TiO2>/CoFe2O4 nanofibers have an efficient photocatalytic property, and the degradation rate of MB could reach 93% in 2.5 h. Moreover, the nanofibers show a good magnetic response. The average diameter of the TiO2/SrFe12O19 nanospheres is 300-700 nm after calcination. and the photodegradation ratio of MB by TiO2/SrFe12O19 nanospheres is up to 93% under irradiation for 2.5 h. The nanospheres has a large coercivity, indicating the possibility of those easy recycling property.

Related Dissertations

  1. Preparation of Based on the Phenolic Resin of Activated Carbon and Adsorption-Photopcatalytical Character of Supported TiO2,TQ424.19
  2. The Study of Preparation and Photocatalytic Activity of TiO2 by Electrospinning,O614.411
  3. First- principles calculations of doped anatase titanium dioxide photocatalytic properties,O643.36
  4. Of Bi N Co-doped TiO \u003csub\u003e 2 \u003c/ sub\u003e of the preparation and performance,O614.411
  5. Investigation of Fabrication, Characterization and Property of Fuctional Titanium Dioxide Nanoporous Materials,TB383.1
  6. Investigation of Preparation and Properties of Ordered Porous TiO2,TB383.2
  7. Preparation and Performance of V2O5-WO3/MOx/Cordierite Catalyst Modified with Cu、Mn、Ce for DeNOx,X701
  8. Preparation and Characterization of Polymer Micro/Nano Fibers by Laser Melt Electrospinning,TQ340.64
  9. Preparation of One-dimensional Nano TiO2 and Study on the Decolorization of Dyeing Wastewater,TB383.1
  10. Bio-inspired Mineralization Process of TiO2 and CaCO3 in Agarose Gel Medium,O611.3
  11. Study the Detection and Adsorption of Formaldehyde in Indoor Air,X831
  12. Iron, lanthanum -doped nano TiO \u003csub\u003e 2 \u003c/ sub\u003e Preparation and photocatalytic properties,O614.411
  13. Inorganic filler of the modified polylactic acid,TQ320.1
  14. Ni / TiO 2 -SiO 2 Preparation, Characterization and Hydrogenation of Maleic Anhydride,TQ225.2
  15. Nano LaFeO 3 Controllable Synthesis and TiO 2 bridged construct composite photocatalyst,O643.36
  16. PVA / Polystyrene Composite Nanofibers Preparation and Characterization,TQ340.1
  17. Composite fiber BiVO 4 Preparation and visible light photocatalytic properties of dyeing wastewater,X791
  18. Doped Modification and Application of Titania Photocatalyst,O643.36
  19. Preparation of Highly Reactive Anatase Titanium Dioxide and Its Application in Photocatalytic Hydrogen Generation,TQ116.2
  20. Hydrogen Evolution Process of Water Electrolysis Assisted by TiO2 Nanotubes and TiO2/ZnO Nanorodes Assembled on Ni Substrate,TQ116.21

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