Details

Autor(en) / Beteiligte

• Zhang, Qiang
• Li, Chaoyang

Titel

Effects of water-to-methanol ratio on the structural, optical and photocatalytic properties of titanium dioxide thin films prepared by mist chemical vapor deposition

Ist Teil von

• Catalysis today, 2020-12, Vol.358, p.172-176

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Anatase TiO2 films fabricated by a novel mist chemical vapor deposition method work as efficient photocatalyst. [Display omitted] •The novel mist CVD method was applied to deposit pure anatase phase TiO2 thin films.•The ratio of water-to-methanol was investigated during the deposition.•The growth of {001} facets of TiO2 thin films were dependent on the water-to-methanol ratio.•The enhanced photodegradation of methyl red was obtained from the TiO2 films synthesized with solvent of pure methanol. The mist chemical vapor deposition method was used to synthesize pure anatase phase titanium dioxide thin films on glass substrates. The effects of water-to-methanol ratio on the structural, optical and photocatalytic properties of titanium dioxide thin films were investigated. Titanium dioxide films deposited by mist chemical vapor deposition were always anatase phase independent of the various water-to-methanol ratios investigated. From the GIXRD results, it was found that with the decrease of the water-to-methanol ratio, the growth of {001} facets was enhanced. The uniformity of the synthesized titanium dioxide thin films was characterized by field emission scanning electron microscopy and atomic force microscope. The highest surface roughness and surface area was obtained with a water-to-methanol of 0 %, corresponding to undiluted 100 % methanol. The transmittance of all anatase titanium dioxide films was higher than 70 % in the visible region. By decreasing the water-to-methanol ratio, the photocatalytic efficiency of the anatase titanium dioxide films exhibited an increasing trend. Due to the highest ratio of {001} facets and maximized surface area, the titanium dioxide films deposited with a water-to-methanol of 0 % have the optimum photocatalytic efficiency, with a high potential for photocatalyst applications.