Dissertation > Excellent graduate degree dissertation topics show

Study on Microwave-assisted Synthesis of TiO2 -loaded Sulfonated Coal at Low Temperature

Author: WangQiong
Tutor: ZhangLvHong
School: Tianjin University
Course: Chemical Engineering
Keywords: sulfonated coal nano-TiO2 microwave assisted low temperature
CLC: O614.411
Type: Master's thesis
Year: 2010
Downloads: 18
Quote: 0
Read: Download Dissertation

Abstract


In this paper, nano-TiO2 was successfully loaded on sulfonated coal by the liquid phase deposition method under the help of microwave radiation with sulfonated coal chosen as the supporter, ammonia as the precipitator and Ti（SO4）2 as precursor. The components and morphology of the as-gained samples were characterized by the high resolution transmission electron microscopy （HRTEM）, X-ray diffraction （XRD）, and the scanning electron microscope （SEM） with energy dispersive spectrometer （EDS）. The effects of the size of sulfonated coal, the mass ratio of sulfonated coal to theoretical yield of TiO2, the firstly microwave radiation power and its time, as well as the bathing time, and the pH value of the solution when TiO2 deposited on the particle sizes of nano-TiO2, its morphology, crystallinity and its photocatalytic activity, the etc. were investigated in this paper. The adsorption behavior of methyl orange by the gained samples was also discussed.It was revealed by the XRD results that nano-TiO2 particles coated on the supporters were pure anatase with high crystallinity and a narrow distribution of sizes around 4.0 nm.The orthogonal test manifested that the firstly microwave radiation power among the three discussed factors had the strongest effect on the particle size and crystallinity of nano-TiO2 which indicated that microwave radiation without sintering at high temperature in place of conventional heating methods not only provided the heat necessary for the synthesis, but also impelled the nucleus formation and growth of the crystal.The single factor variants experiment showed that the time of firstly microwave radiation had a very strong influence on the particle sizes while almost had no influence on the crystallinity; prolonging the bathing time or keeping the pH value of the solution when TiO2 precipitated between 6～9 were in favor of the nucleus formation of the crystal; a positive relationship between the pH value, in the range of 6 to 9, of the solution when TiO2 precipitated and the particle sizes of nano-TiO2 was discovered.It was observed that the adsorption of methyl orange by the samples belonged to physical adsorption, releasing 9.229 Joule per mole.The kinetic character of the photocatalytic degradation of methyl orange in aqueous suspension by the as-gained samples under ultraviolet light was researched and it was discovered that the photocatalytic reaction obeyed the first-order kinetic reaction equation; the apparent reaction rate constant was used to judge the photocatalytic activity of the as-gained samples. It was confirmed that the sizes and crystallinity of nano-TiO2 particles loaded on the sulfonated coal had a positive relationship with its photocatalytic activity.The study of repeatedly used samples in photocatalytic experiment showed that the as-gained samples had a quite good photocatalytic activity and performed strong stability.

Related Dissertations

  1. Fly Ash study of low temperature ceramic foam,TU52
  2. Cryopreservation and Transportation for Portunus Pelagicus, Soft Shell Crab and Spawning Crab,S968.252
  3. Effects of Low Temperature Stress on Fatty Acid Composition and Content of Oreochromis Hornorum,S917.4
  4. The Study of NO Low-temperature Catalytic Oxidation Over MnFeO_x Catalyst,X701
  5. Effects of Low Temperature Stress on Blood Physiological and Biochemical Indexes of Oreochromis Hornorum,S917.4
  6. Theeffect of Environmental Factor on Rooting Culture of Paeonia Suffruticosa in Vitro,S685.11
  7. Effects of Temperature and Raising Seedling Pattern on the Growth and Development of Strawberry,S668.4
  8. Cryopreservation and Damage Research of Sperm of Cobia (Rachycentron Canadum) and Crimson Snapper (Lutjanus Erythopterus),S961.2
  9. The Study of Anode Catalyst Pd/C for Direct Formic Acid Fuel Cell,O643.36
  10. Curing Mechanism and Properties of Fluorenyl Epoxy Resin,TQ323.5
  11. Identification、Diversity and Phylogenetic Analysis of Antagonistic Bacillus Isolated from Different Chinese Areas,S476.1
  12. Agrobacterium-mediated Transformation of GmWRKY21 into Soybean,S565.1
  13. Study on Cold Tolerance of Flower Organ of Cut Chrysanthemum in Winter,S682.11
  14. Effects of Low Temperature Conditioning and Salicylic Acid Treatment on Chilling Injury of Peach Fruit and the Possible Mechanicsms,S662.1
  15. Functional Analysis of MdCBF1 in Malus Domestica Borkh. CV. Fuji,S661.1
  16. Studies on Postharvest Physiology and Storage Technology of Honey Peach Fruits,S662.1
  17. Study on the Synthesis of New Containing Pyrazole Ring Aminophosphonate and 1,4-DPHs Derivatives,O626
  18. Large-scale demonstration of coal pyrolysis Exploration and Practice,TQ536
  19. Lithium anode material calcined alumina crucible Development,TQ174.6
  20. The Effect of Low Temperature Stress on Fatty Acid of Cell Membrane in Alfalfa Crowns,S541.9
  21. Effects and Mechanism of Fluoroethylene Carbonate on Low Temperature Performance of Li-ion Batteries,TM912

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