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Study on the Control of Phase Transformation and Photocatalytic Properties of Composite Photocatalysts

Author: WangChengJian
Tutor: XuMingXia
School: Tianjin University
Course: Materials Science
Keywords: SnO2 doped Anatase Rutile Crystal transition Sol-gel Titanium dioxide film Photocatalytic Oxidation
CLC: TB383
Type: Master's thesis
Year: 2003
Downloads: 304
Quote: 1
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Abstract


Industrial grade titanyl sulfate as raw materials , respectively, with a fractional precipitation method and coating prepared different SnO2 doping amount of Ti-Sn -based composite powder; powders were heat - treated under different conditions by XRD , TEM and BET were investigated crystal type of powder morphology and specific surface area , and specific surface area data calculated by the equivalent diameter of the particles . The article is mainly to study the impact of TiO2 powder from anatase to rutile phase transformation factors ; focused on the of SnO2 doping and calcination system of crystal transition . The experimental results show that : a significant reduction of SnO2 doped TiO2 from anatase to rutile phase transition temperature ; and have a great impact in the A / R ratio of SnO2 doping of TiO2 . Experiment with methyl orange solution simulate actual sewage , using a Ti-Sn compound powder as a photocatalyst , the use of an inorganic binder of aluminum phosphate to be adhered on the glass , the photocatalytic degradation experiments . The content of rutile and SnO2 doped amount of composite powders photocatalytic properties . The results show that : 600 ℃ 30min processing step precipitate prepared composite powder the SnO2 doped amount of 16 % ( 22.75% ) of the R phase content , the highest decolorization rate , the powder has the best photocatalytic performance , 4h methyl orange decolorization rate of 88.4% . Article also TiOSO4 and Ti (OBu) 4 as precursor sol , glass fiber cloth and glass plate as the carrier prepared Supported TiO2 as a photocatalyst . The results show that the film of the sol-gel method is higher photocatalytic activity than the supported composite powders , the load Tetrabutoxide the glass for better performance of the precursor film 4h methyl orange decolorization rate 92.1% .

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CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Special structural materials
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