Dissertation > Excellent graduate degree dissertation topics show

Preparation and Photoelectrocatalytic Activity of Titania-based Photoanode Coated on Foam Nickel

Author: ZengMengXiong
Tutor: LiYouZuo
School: Jishou University
Course: Applied Chemistry
Keywords: TiO2 foam nickel activated carbon doped Ag photoelectrocatalytic methylene blue
CLC: O643.3
Type: Master's thesis
Year: 2013
Downloads: 44
Quote: 0
Read: Download Dissertation


The porous TiO2film electrode coated foam nickel (PTFN) was successfullyprepared by a hard-template method with using activated carbon, foam nickel as apore-forming agent and a substrate in this paper. The photoelectrocatalytic degradationof methylene blue(MB) by the porous TiO2film electrode coated foam nickel under UVirradiation light was investigated in a homemade photoelectrocatalytic reactor whichused the thin film electrode as working electrode, copper electrode as counter electrode.the main influencing factors, such as the number of coating, activated carbon doping,anode bias voltage, ventilation rate and initial concentration of MB, which effect of thephotoelectrocatalytic degradation of MB was discussed. The results show that thephotoelectrocatalytic degradation rate of MB was greatly enhanced by the synergeticeffect of photoelctrocatalysis and adding activated carbon as a pore-forming agent.Additionally, there exits an optimum photoelectrocatalytic degradation conditions. whencoating thin film four times and under3V of bias voltage,40L·h-1of ventilation rateand1mg·L-1of MB initial concentration with a mole ratio of activated carbon to Tielement in precursor bing10%, the photoelectrocatalytic degradation efficiency of MBis the highest, the degradation rate of MB could reach99%in150min. Meanwhile, it isalso find that MB molecuars are oxidated by free radicals in the process ofphotoelectrocatalytic degradation and occurred in the C=N bond rupture demethylation,and finally are degraded into H2O, CO2and ions such as SO42, NO3and Cl.The porous Ag-TiO2film coated foam nickel (PATFN) was successfully preparedon foam nickel substrates by a hard-template method with using activated carbon aspore-forming agent. The modified porous Ag-TiO2thin films coated foam nickel werecharacterized by the techniques of XRD, SEM, TEM, XPS and TG-DTA. The SEMpatterns indieated that the surface of the porous Ag-TiO2thin film electrode was unevenand had porous structures; As confirmed by XRD showed that the crystal structure ofTiO2was still anatase-form, the effects of Ag doping on crystal structure of TiO2wasnot obvious. The results showed that the PATFN shows the highest photoelectrocatalyticactivity for the degradation of methylene blue when the mole ratio of Ag ion to TiO2is0.3%In addition, the degradation rate of MB could reach99%in150min when coatingthin film four times and under3V of bias voltage,40L·h-1of ventilation rate,1mg·L-1of MB initial concentration and pH=9. Meanwhile, the degradation rate of MB alsocould reach80%after five times recycle of the photoanode.The kinetics of photoelectrocatalytic degradation reaction, photocatalytic degradat-ion reaction and electriccatalytic degradation reaction for MB on porous Ag+-dopedTiO2thin film photoanode was discussed. Meanwhile, the kinetics of photoelectrocatal-ytic oxidation reaction for different initial concentration of MB was studied. The resultsshowed that the catalytic kinetic equation followed the equation of Langmuir-Hinshelw-ood equation.The catalytic kinetic equation is y=7.07x+23.85, the photoelectrocata-lytic surface reaction rate constant is kc=0.1414mg·L-1·min-1, and the adsorptionbalance constant is Kc=0.299L·mg-1.

Related Dissertations

  1. Preparation of Based on the Phenolic Resin of Activated Carbon and Adsorption-Photopcatalytical Character of Supported TiO2,TQ424.19
  2. Studies on Synthesis, Characterization and Properties of Fe-V Co-doped TiO2 Catalyst,O614.411
  3. Study on Activated Carbon Supported Cerium Catalytic Ozone Oxidation of Chloramphenicol,X703
  4. Under microaerobic conditions closed calcium carbide furnace exhaust COS gas adsorption purification,X781
  5. Preparation of Activated Carbon from Tobacco Stems and Application for Low Concentration Phosphine Adsorption,X712
  6. Study on the Algae-Lytic Mechanism of Algicidal Bacteria on Microcystis Aeruginosa and the Algiciadal Substance Characteristics,X173
  7. Study on Properties of Ce、Co、Ni/V-W/TiO2 Modified by Composite Sol for Selective Catalytic Reduction,X701
  8. Preparation of One-dimensional Nano TiO2 and Study on the Decolorization of Dyeing Wastewater,TB383.1
  9. Development of Functional Automotive Interior Textiles,TS106.6
  10. Effects of Different Vegetation Restoration Types on Soil Carbon, Nitrogen and Microbial Flora in Guandi Mountain,S154.4
  11. Ni / TiO 2 -SiO 2 Preparation, Characterization and Hydrogenation of Maleic Anhydride,TQ225.2
  12. Preparation of Supported TiO2 Photocatalyst by Molecular Sieves of KIT-6 and Its Photocatalysis Properites Research,O643.36
  13. Preparation and Characterization of Carbon Materials as Electrode Materials for Supercapacitor,TM53
  14. Study on the Preparation of Functionalized Graphene and Adsorption of Heavy Metal and Methylene Blue,O647.3
  15. Study on the Preparation of Chemically Modified Lawny Grass Cellulose Containing Cyanex272 Adsorbents and Biosorption of Heavy Metals Pb(Ⅱ), Cd(Ⅱ) and Methylene Blue,X703
  16. Synthesis of FeTiO3 Mineral and Characteristic of Photocatalysis,X703
  17. Preparation of POM/TiO2 and Its Photocatalytic Degradation of Dye Wastewater,X791
  18. Studies on the Catalytic Performance of Modified Activated Carbon in the Regeneration of Fe(Ⅱ)EDTA Solution,TQ424.1
  19. Advanced Oxidation Processes for the Degradation of Toluenediamine Wastewater,X78
  20. The Experimental Study on Modification Activated Carbon for the Adsorption of 2,4,6-TCP from Water and Microwave Regeneration,X703
  21. Studies on Degradation of Acephate by Advanced Oxidation Processes,X703

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