Dissertation > Excellent graduate degree dissertation topics show

The Preparation and Characterization of Kaolinite Substrate Photocatalytic Nanometer TiO2

Author: GuYongQin
Tutor: LeiShaoMin
School: Wuhan University of Technology
Course: Mineral Processing Engineering
Keywords: Nano - titanium dioxide Kaolinite Characterization Photocatalytic Degradation Acid Red
CLC: O643.3
Type: Master's thesis
Year: 2004
Downloads: 221
Quote: 6
Read: Download Dissertation

Abstract


The semiconductor photocatalytic material research topic in recent years, caused many scholars widespread concern. In many semiconductor photocatalysts, TiO 2 has good chemical stability, high photocatalytic efficiency advantages of low-cost, non-toxic, broad applications in environmental engineering, green building materials in the field will show prospects. The nanoscale TiO 2 has a higher catalytic activity, but nanopowder TiO 2 photocatalyst degradation of pollutants, there is a TiO 2 Easy reunion, not to facilitate recycling and reuse, and other issues, and thus the actual application is limited. At present, there are many scholars dedicated to the study of the photocatalytic photocatalytic activity, so that it can be reused. So far, it has been studied many carriers, such as: ceramics, glass, quartz, stainless steel, activated carbon, fiber etc.. Rich in non-metallic mineral resources in China, if the photocatalyst with the surface of the non-metallic mineral composite prepared Photocatalyst / mineral composite materials, will promote the pace and study the process of photocatalytic technology in environmental engineering, green building materials in the field. In this paper, kaolinite carrier successfully prepared by sol - gel method kaolinite based nano-TiO 2 photocatalyst. And preliminary hydrolysis temperature, hydrolysis time, drying temperature, calcination temperature, pulp density and other factors on kaolinite based nano-TiO 2 photocatalyst photocatalytic activity. Preliminary studies indicate that: kaolinite based nano-TiO 2 photocatalytic materials: hydrolysis temperature 37 ° C, hydrolysis time 4h, drying temperature of 80 ° C, the thermostat 1h, calcination temperature of 550 ° C thermostat 3h. The kaolinite stone based nano-TiO obtained 2 photocatalyst were characterized by analysis kaolinite surface and interfacial characteristics. XRD analysis shows that with the calcination temperature of the different a of TiO 2 photocatalyst shows the different crystalline forms; kaolinite is of 5-10nm of TiO 2 can be clearly seen in the TEM photograph < / sub> particles uniform coverage; seen by IR characterization the TiO 2 and kaolinite in the Si-O-Ti bonding; XPS analysis available kaolinite based nano-TiO 2 surface atomic distribution, combined with Raman spectra we conclude successfully the TiO 2 nano thin film in the form of uniform fixed in the surface of the kaolinite formed TiO 2 / kaolinite mineral composite photocatalytic materials. In order to evaluate the kaolinite based nano-TiO 2 photocatalyst photocatalytic activity were simulated dye wastewater Acid Red dye wastewater azo dyes as the research object, through the degradation experiments found that the sol - gel Preparation of kaolinite based nano TiO 2 photocatalyst simulated dye wastewater, or the actual dye wastewater have good photocatalytic decolorization effect. Previous studies, this study is the low temperature (37 ° C hydrolysis 4h, 80 ° C dry 1h), sol - gel preparation a uniform particle size distribution, chemical activity good nano TiO 2 / kaolinite mineral composite photocatalytic materials. Simulated dye wastewater acidic red under UV irradiation (20mg / L) decolorization rate of 82.44%, 91.67% of the actual dye wastewater copper complex azo dyes decolorization rate. In this study of nano-TiO 2 / kaolinite mineral composite photocatalytic materials further research to provide a theoretical and experimental basis.

Related Dissertations

  1. The convergence of mathematics teaching in primary and secondary schools under the new curriculum with the problem representation,G633.6
  2. Studies on Synthesis, Characterization and Properties of Fe-V Co-doped TiO2 Catalyst,O614.411
  3. Characterization of Corn Lectin and Application to Screen of Growth-promoting Bacteria from Corn Rhizosphere,S513
  4. Health-based and Ecological Risk Assessment of Contaminated Sites,X820.4
  5. Preliminary Research on Characterization of Thermophilic Protease Pasey and Helicase Htc16,Q814
  6. Cloning and Expression of Xylanase Gene from Thermobifida Halotolerans YIM 90462~T,Q78
  7. Isolation and Characterization of Carbendazim-Degrading Strains, Cloning and Expression of the mheI Gene,X172
  8. Characterization of an Atrazine-Degrading Strain, Cloning of Key Degrading Related Genes and Construction of a Gene Cluster,X172
  9. Study on the Characteristics of Endoproteases and Changes of Main Nitrogenous Components during Brown Rice Germination,TS210.1
  10. Characterization and Combining Ability of New CMS Lines Improved Using Zhenshan 97 B, an Early Maturity Maintainer, in Indica Rice (Oryza Sativa L.),S511.21
  11. Isolation of Xylanase Producing Bacteria from the Large Intestine of Adult Inner Mongolia Black Sow and Its Enzyme Producing Factors,S816.7
  12. Characterization of a New L-amino Acid Oxidase from Agkistrodon Blomhoffii Ussurensis Snake Venom,Q55
  13. The Research of the Characterization of Cellulase and Isolation from Omphis fuscidentalis,Q814
  14. Preparation, Separation of Monascus Pigments and Structural Characterization of Monascus Yellow Pigment,TS264.4
  15. Written by English bilingual mental representation of word recognition and activation process of,B84
  16. Molecularly Imprinted Polymer Microspheres and Evaluation,O631.3
  17. Complexes of two iodine three Allylthiourea together Synthesis and Characterization of cadmium,O627
  18. 1,4 - bis (4 - amino-2 - (trifluoromethyl) phenoxy ) benzene -type Schiff base imide copolymer synthesis and characterization,O631.3
  19. New water-based whiteboard ink water development,TS951.23
  20. Quad core and single-core 1,3,5 - triazine pentadiene Synthesis and characterization of metal,O627
  21. The Frequency Characteristics of Mind Wandering: Questionnaire Development,B841

CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Chemical kinetics,catalysis > Catalytic
© 2012 www.DissertationTopic.Net  Mobile