Synthesis and Characterization of Vanadium-Titanium-Tungsten Composite Materials

• Main Authors: Pei-Yin Chou, 周佩吟
• Other Authors: Jem-Kun Chen
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/zh7nzh

碩士 === 國立臺灣科技大學 === 材料科學與工程系 === 99 === The study investigated the properties of V1-xTiXO2-WO3 powder and V1-xTiXO2-WO3 thin film. TiO2 as a self-cleaning materials had been used widely in the glass. VO2 was mainly used in glass as energy-saving materials; a high transparent glass with energy-saving function to become an important topic currently. TTIP、VO(OiPr)3 and WO3 containing various molar ratio were used to mix to be precursor. It’s had better photocatalytic ability of the composite material. The precursor of V1-xTiXO2-WO3 was sintered at 500℃ and 700℃ under air environment to turn into V1-xTiXO2-WO3 nanopowders. The TiO2 doped molar ratio composition were 0, 2, 4, 6, 8, and 10, expressed as Ti0V10W0.1, Ti2V8W0.08, Ti4V6W0.06, Ti6V4W0.04, Ti8V2W0.02 and Ti10V0W0. X-ray diffraction analysis crystalline phase identification of the composite material and the V1-xTiXO2-WO3 material was observation surface morphology under scanning electron microscope . The results illustrated of Ti0V10W0.1 composite powder and Ti2V8W0.08 composite powder demonstrated rod beam-like, with titanium dioxide doping content increased the formation of powder particles tend to form spherical. Ti10V0W0 powder particle size was about 1.096 μm under 500℃ sintering temperature, Ti10V0W0 powder particle size was about 164 nm in 700℃ sintering temperature. Titanium dioxide was doped 0, 2, 4, 6, 8, 10 molar ratio in the VO2-WO3 decreased the phase transition temperature from 68℃ to 62℃. The glass substrate by O2 plasma treatment to increase the polarity of the surface strength, the composite oxide precursor was spin-coated on the glass substrate, then by 700℃ temperature thermal reduction. V1-xTiXO2-WO3 precursor was spin-coated one layer on the glass. The precursor of thin film of thickness was about 38.55 ± 2nm. After sintering 700℃, the thin film of V1-xTiXO2-WO3 of thickness was 23.77 ± 2nm. The decomposition efficiency of Methylene blue of Ti0V10W0.1, Ti2V8W0.08, Ti4V6W0.06, Ti6V4W0.04, Ti8V2W0.02 and Ti10V0W0 to approach 13.11、 12.31、 40.52、 45.70、 61.12 and 91.99% under UV light exposure after 24 hours,. The result illustrate that vanadium containing in TiO2 particles enhance the efficiency of photocatalyst.