Dissertation > Excellent graduate degree dissertation topics show

Manganese oxide particles in water and ZnO on TiO_2 photocatalytic bactericidal activity

Author: ZhuZuo
Tutor: LiuJingZe；MaZiChuan
School: Hebei Normal
Course: Ecology
Keywords: Photocatalytic Sterilize TiO2 ZnO Manganese oxide E. coli
CLC: Q93-3
Type: Master's thesis
Year: 2010
Downloads: 88
Quote: 1
Read: Download Dissertation

Abstract


Photocatalytic disinfection technology because of low consumption, high efficiency and other characteristics of much attention, in water treatment has also been more widely used. Water treatment to kill pathogens in drinking water treatment in particular extremely important part. Water to be treated not only contains a variety of pathogens, there are many particulate impurities which affect the photocatalyst particles by the nature or the photocatalytic process, can affect its photocatalytic activity. This paper selected two commonly used photocatalyst TiO 2 and ZnO as a drinking water purification instructions to kill bacteria Escherichia coli ATCC 8099, select contaminated water three common manganese oxide particles α- MnO 2 , β-MnO 2 and γ-MnOOH as an impurity particles. The main contents of the study are: ultraviolet excitation light sources of different TiO 2 bactericidal activity, different crystal manganese oxide particles on TiO 2 and ZnO photocatalytic bactericidal activity, different initial pH values ??(4.0,6.0,8.0) manganese oxide particles on TiO 2 and ZnO photocatalytic bactericidal activity of different concentrations of manganese oxide particles on TiO 2 and ZnO photocatalytic bactericidal activity, different excitation light sources of manganese oxide particles on TiO 2 and ZnO photocatalytic bactericidal activity. Found that with shorter wavelength excitation light source and light intensity enhancement, TiO 2 bactericidal activity was enhanced; manganese oxide particles on TiO 2 strong photocatalytic bactericidal activity inhibition, and the α-MnO 2 strongest inhibition, γ-MnOOH followed, β-MnO 2 Again, while manganese oxide particles photocatalytic bactericidal activity of ZnO almost no inhibition; bacterial suspension initial pH on manganese oxide particles on TiO 2 inhibition of photocatalytic bactericidal activity have a greater impact, initial pH 8.0, the strongest inhibition, pH, is 4.0 second, pH value 6.0 again, and for ZnO, and manganese oxide particles of the three pH values ??are not inhibit the photocatalytic bactericidal activity; with the bacterial suspension concentration increased manganese oxide, TiO 2 photocatalytic bactericidal activity is inhibited also increases, while the ZnO photocatalytic activity even with higher concentrations of manganese oxide is not co-suppressed, increasing the concentration of manganese oxide can not be to impact; long wavelength excitation light irradiation, TiO 2 photocatalytic activity may be the inhibition of manganese oxide particles, short-wave excitation light irradiation, the manganese oxide particles produce inhibition of its greatly reduced, regardless of the longwave or shortwave excitation source, manganese oxide ZnO particles were unable to suppress the photocatalytic bactericidal activity. In summary, ZnO as a photocatalyst, the bodies of water of manganese oxide particles having stability, TiO 2 photocatalyst in the long-wavelength excitation light source, the bactericidal activity of the photocatalytic particles may be manganese oxide inhibition by short-wave excitation light irradiation greatly reduced inhibition.

Related Dissertations

  1. Studies on the Synthesis and Technology of Dipentaerythritol and Its Derivative,TQ223.164
  2. Preparation and Photocatalytic Properties for Water Decomposition of Titanate Photocatalyst,O643.36
  3. Preparation of Based on the Phenolic Resin of Activated Carbon and Adsorption-Photopcatalytical Character of Supported TiO2,TQ424.19
  4. Establish a Quantitative Method and Its Kit for Detection of Escherichia Coli and Salmonella. Spp,S154.3
  5. The Preparation and Research of Magnetically Separable TiO2 Photocatalyst Nanofibers,TB383.1
  6. Studies on Synthesis, Characterization and Properties of Fe-V Co-doped TiO2 Catalyst,O614.411
  7. The Study of Preparation and Photocatalytic Activity of TiO2 by Electrospinning,O614.411
  8. Study on the Chimisorption Removal of FCC Gasoline Sulfur Compound,TE624.55
  9. Of Bi N Co-doped TiO \u003csub\u003e 2 \u003c/ sub\u003e of the preparation and performance,O614.411
  10. Investigation of Fabrication, Characterization and Property of Fuctional Titanium Dioxide Nanoporous Materials,TB383.1
  11. Investigation of Preparation and Properties of Ordered Porous TiO2,TB383.2
  12. Preparation and Performance of V2O5-WO3/MOx/Cordierite Catalyst Modified with Cu、Mn、Ce for DeNOx,X701
  13. Study on Properties of Ce、Co、Ni/V-W/TiO2 Modified by Composite Sol for Selective Catalytic Reduction,X701
  14. Preparation of One-dimensional Nano TiO2 and Study on the Decolorization of Dyeing Wastewater,TB383.1
  15. Molecular Cloning and Differential Expression of Isopentenyl-Diphosphate Delta Isomerase 1 Gene from the Fungus Ganoderma Lucidum,S567.31
  16. Photodegradation of Orange Ⅱ by Mesoporous TiO2,X791
  17. Combination Degradation of Chlor Pyrifos Via Biodegradation and Photodegradation,X592
  18. Study the Detection and Adsorption of Formaldehyde in Indoor Air,X831
  19. Preparation and Photocatalytic Properties of Semiconductor Oxides,O643.36
  20. Inorganic filler of the modified polylactic acid,TQ320.1
  21. Degradation of microcystin and Elimination Methods,X173

CLC: > Biological Sciences > Microbiology > Microbiology and microbial experiments
© 2012 www.DissertationTopic.Net  Mobile