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Title: Effect of alcohol solvents on TiO<inf>2</inf>films prepared by sol–gel method
Authors: Orawan Wiranwetchayan
Surin Promnopas
Titipun Thongtem
Arnon Chaipanich
Somchai Thongtem
Keywords: Chemistry
Materials Science
Physics and Astronomy
Issue Date: 15-Oct-2017
Abstract: © 2017 Elsevier B.V. The TiO2(anatase) films were prepared by sol-gel method using titanium (IV) isopropoxide (TTIP) as a precursor and polyvinylpyrrolidone (PVP) as a polymeric precursor dissolved in different alcohol solvents (methanol, ethanol, isopropanol and 1-butanol) and were heated treatment at 450 °C for 1 h. In this research, the alcohol solvents have significant influence on the morphology, crystalline degree and energy band gap of TiO2. The number of carbon, boiling point, dielectric constant and viscosity of alcohol solvents were the main factor influencing the size of TiO2nanoparticles. The alcohol solvent with higher boiling point and viscosity, and long length of carbon chain can lead to the smaller crystallite size. The number of carbon and viscosity of solvent and crystallite size can play the important role in the agglomeration of particles. The energy band gaps of the films determined by UV-visible spectroscopy were in the 3.00–3.30 eV range.
ISSN: 02578972
Appears in Collections:CMUL: Journal Articles

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