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Study on Preparation and Properties of TiO2 Nanotubes and Hollow Spheres

Author: LinXing
Tutor: LiuWeiLiang
School: Jingdezhen Ceramic Institute
Course: Materials Physics and Chemistry
Keywords: TiO2 nanotubes TiO2 hollow spheres Hydrothermal method Photocatalytic properties
CLC: TB383.1
Type: Master's thesis
Year: 2010
Downloads: 164
Quote: 0
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Abstract


TiO2 photocatalytic materials important part , TiO2 nano- tubes , hollow ball has a larger surface area , they are mainly in the photocatalytic degradation of pollutants , solar energy storage, photoelectric conversion has an important purpose . In this paper, tetrabutyl titanate as precursor by the sol - gel Synthesis of TiO2 powder . Glucose as reactants the Hydrothermal Synthesis carbonaceous polysaccharide microspheres carbonaceous polysaccharide microspheres as a template , using the sol-gel method TiO2 hollow spheres . TiO2 nano- powder and NaOH as raw materials, Hydrothermal Synthesis of titanate nanotubes , the nanotubes at 350 ° C , 450 ° C , 550 ° C calcination 6 hours after anatase TiO2 nanotubes ( TNT ) . The performance of the product were characterized by X-ray diffraction , scanning electron microscopy , transmission electron microscopy , UV - visible spectrophotometer test methods to explore the factors that affect the photocatalytic properties . The experimental results show that the hydrothermal reaction time increases , the particle diameter of the carbon-containing polysaccharide microspheres gradually increased . Carbonaceous polysaccharide microspheres as a template prepared anatase TiO2 hollow sphere particle size of about 650nm, the ball wall thickness to 18 nm . Hydrothermal Synthesis of nanotubes as amorphous composition H2Ti2O5 · H2O . With the extension of the hydrothermal reaction time , increased content of nanotubes and nanotube growth ; when the hydrothermal reaction temperature is within a certain range , as the hydrothermal reaction temperature is elevated , increased content of nanotubes , nanotube growth . The photocatalytic efficiency nanotubes hydrothermal reaction time and hydrothermal temperature is proportional to . Titanate nanotubes calcination treatment to obtain titania nanotubes ( TNT ) , TNT in anatase content increases with increasing calcination temperature , but the tubular structure is destroyed . TiO2 nanotubes Effect of methylene blue photocatalytic efficiency factors , including adsorption properties and crystal . Hydrothermal reaction temperature of 200 ° C , the reaction time was 20h prepared titanate nanotubes after calcination at 450 ℃ , the best of methylene blue photocatalytic degradation .

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