Dissertation > Excellent graduate degree dissertation topics show

The Study of Preparation and Photocatalytic Activity of TiO2 by Electrospinning

Author: ChenYingSheng
Tutor: ChenRiYao;ChenZhen
School: Fujian Normal University
Course: Environmental Engineering
Keywords: TiO2 electrospinning nanofiber doping load photocatalysis degradation
CLC: O614.411
Type: Master's thesis
Year: 2011
Downloads: 20
Quote: 0
Read: Download Dissertation

Abstract


Water is one of the substances for the human survival.And now, the shortage of water resource in the worldwide not only restricts the economic development, but also threatens the survival of mankind. More and more people are devoted to developing technology for waste water treatment. The photocatalytic degradation is one of the new developed techniques. Photocatalytic oxidation technology is usually adopted for its high effciency, low energy consumption, simple operation, mild reaction condition, wide application range, and little secondary pollution.Nano-TiO2 is widely applied in photocatalysis degradation due to its advantages of large specific surface area, non-toxicity, low cost, and long service life. The usage of nano-TiO2 is limited by its strong polar, high surface free energy and easily agglomeration in water and organic solvents, which reduces the effective action area of nano-TiO2. Meanwhile, the coverage rate of organic pollutant on nano-TiO2 surface is very low. And the nano-TiO2 photocatalyst only absorbs the very small ultraviolet part of solar light due to its wide band gap of 3.2eV. All of the above factors results in the low adsorption and photocatalytic degradation efficience of the organic pollutant. Therefore, nano-TiO2 should be modified to solve above problems.The Ti(OC4H9)4/Zn(CH3COO)·2H2O PVP fibers were prepared by electrospinning using polyvinyl pyrrolidone(PVP)/Zn(CH3COO)2·4H2O/Ti(OC4H9)4 sol, and then Ti(OC4H9)4/Zn(CH3COO)2·2H2O PVP fibers were heated at 550℃for 6h to obtain Zn2+ doped TiO2 nanofibers. The structure and properties of the ZnO-TiO2 coaxial fibers were investigated using FTIR,XRD, SEM. The photocatalytic properties of ZnO-TiO2 nanofibers were studied by the degradation of methylene blue under UV irradiation.The photocatalytic degradation of 100mL 2.0mg/L methylene blue by ZnO-TiO2 nanofibers under UV irradiation for 40 minutes showed that ZnO-TiO2 exhibited high photocatalytic activity. The degradation rate of methylene blue was more than 70%.The Ti(OC4H9)4/Ni(CH3COO)2-4H2O PVP fibers were prepared by coaxial electrospinning using PVP/Ni(CH3COO)2·4H2O sol as the core and PVP/Ti(OC4H9)4 sol as the shell, and then Ti(OC4H9)4/Ni(CH3COO)2·4H2O PVP fibers were heated at 550℃for 6h to obtain NiO-TiO2 coaxial nanofibers. The structure and properties of the NiO-TiO2 coaxial fibers were investigated using FTIR, XRD, SEM, and TG. The photocatalytic properties of NiO-TiO2 coaxial nanofibers were studied by the degradation of methylene blue under UV irradiation. In comparing with TiO2 nanofibers, the NiO-TiO2 coaxial nanofibers exhibited higher photocatalytic activity for the degradation of methylene blue. And the catalyst could be used repeatedly.The fabrication of the kryptol nanofibers were investigated, which were made of polyvinylpyrrolidone (PVP) sol using the electrospinning technique. And then they were preoxidized at 250℃and carbonized at 850℃. The carbon nanofibers were soaked by titanium n-butyloxide (Ti(OC4H9)4), then heat-treated at 200℃and calcined at 550℃to obtaine TiO2 nanoparticles loaded on the carbon nanofibers. The morphological structure of the ultrafine fibers were studied by SEM, FT-IR, and XRD. TiO2 loaded on carbon nanofibers degraded 100mL 2.0mg/L methylene blue under UV irradiation for 40 minutes, which indicated that TiO2 loaded on carbon nanofibers exhibited high photo-catalytic activity. The degradation rate of methylene blue was more than 75%. And the TiO2 nanoparticles loaded on the carbon nanofibers were good for reused.

Related Dissertations

  1. Studies on the Synthesis and Technology of Dipentaerythritol and Its Derivative,TQ223.164
  2. Preparation of Based on the Phenolic Resin of Activated Carbon and Adsorption-Photopcatalytical Character of Supported TiO2,TQ424.19
  3. Study on the Degradation of Unsaturated Polyester Resin and Fiber Reinforced Polymer in Hot Compressed Water,TQ320.1
  4. The Design & Research of Automatic Transmission Load Simulator,TH132.46
  5. Based on Nonliner Finite Element Analysis of the Infilled Wall Frame Structure,TU323.5
  6. The Development of Soft System for Power Load Management Terminal Testing Device,TP311.52
  7. Process Optimization and Degradation Kinetics for Microwave Vacuum Drying of Different Traditional Chinese Medicine Extract,TQ461
  8. The Preparation and Research of Magnetically Separable TiO2 Photocatalyst Nanofibers,TB383.1
  9. Study on the Preparation of the Low Molecular Weight Fuciodan from Sargassum Henslowianum (C.Agardh) and Anti-tumor Activity,TS254.9
  10. Study on Activated Carbon Supported Cerium Catalytic Ozone Oxidation of Chloramphenicol,X703
  11. Study and Preparation of BaTiO3-based NTC Ceramic Thermistors,TQ174.1
  12. Process and Mechanism of Eucalyptus Pulp Bleaching Catalysed by Cu2+/Co2+,TS745
  13. Research on Vocabulary Acquisition through Reading in the Perspective of Incidental Vocabulary Learning,G633.41
  14. First- principles calculations of doped anatase titanium dioxide photocatalytic properties,O643.36
  15. Of Bi N Co-doped TiO \u003csub\u003e 2 \u003c/ sub\u003e of the preparation and performance,O614.411
  16. The Research on Sulfate Leaching Properties of Cation-exchange Resin Used in Power Plants,TQ425.23
  17. Cost-Benefit Analysis on Management Practices of Agricultural Non-Point Source Point Source Pollution in Yixing,X592
  18. Study of Nitrobenzene Wastewater’s Treatment by Combination of Immobile Phanerochaete Chrysosporium and Activated Sludge,X703
  19. Study on the Breeding of High Efficient Detoxification Strains and Suggestion Parameters of Solid Fermentation on Cottonseed Meal,S816.6
  20. Investigation of Fabrication, Characterization and Property of Fuctional Titanium Dioxide Nanoporous Materials,TB383.1

CLC: > Mathematical sciences and chemical > Chemistry > Inorganic Chemistry > Metal elements and their compounds > Section Ⅳ group metal elements and their compounds > The titanium Vice family ( IV B group metal elements) > Ti Ti
© 2012 www.DissertationTopic.Net  Mobile