Nanostructured titanium dioxide film preparation using inorganic nanoparticles instead of organic precursor materials

Jamali, A. y Eghbali, M. H. (2011) Nanostructured titanium dioxide film preparation using inorganic nanoparticles instead of organic precursor materials. Química Hoy, 1 (4). pp. 9-18. ISSN 2007-1183

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Resumen

Carbon dioxide is a major contributor to global warming. A promising method of reducing the concentration of atmospheric carbon dioxide is by photocatalytic conversion of carbon dioxide into renewable fuels, which has to be done using a photocatalytic film. The nanostructured film preparation method proposed in this study is a preparation of colloidal solution followed by film deposition using manual coating methods, mostly vertical dip-coating. Deposited films were calcined to form a crystalline film on the glass substrate. This method was adopted in case of film preparation from titanium dioxide. Comprehensive study on impact of different factors including temperature, type of surfactants, type of solvents, concentration of surfactants, and concentration of solvents on quality of thin film including band gap, particle size, strength and homogeneity was performed in this work. Material characterization tests including UV-Visible spectroscopy and field emission scanning electron microscopy were carried out to analyse the film characteristics. Mechanical tests including wipe test, rinse test, acetone test, scratch test and scotch tape test were performed to analyse the mechanical strength of obtained thin film. Nanostructured films were successfully prepared with controlled particle size in the range of 70-100 nm for TiO2. Films obtained in this study demonstrate acceptable durability and partial uniformity. The film preparation method used in this study was markedly economical, facile and reproducible.

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