Influence of Sol-Gel pH and Soaking Time on the Morphology, Phases and Grain Size of TiO2 Coating
| Autor: | Muharniza Azinita Musa, Nur Dalilah Johari, Jariah Mohamad Juoi, Zulkifli Mohd Rosli |
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| Rok vydání: | 2017 |
| Předmět: |
Morphology (linguistics)
Materials science Brookite Inorganic chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Grain size 0104 chemical sciences Chemical engineering visual_art Tio2 coating visual_art.visual_art_medium General Materials Science 0210 nano-technology Sol-gel |
| Zdroj: | Solid State Phenomena. 268:219-223 |
| ISSN: | 1662-9779 |
| DOI: | 10.4028/www.scientific.net/ssp.268.219 |
| Popis: | Titanium oxide, (TiO2), can exist in three distinct crystallographic phases known as anatase, rutile, and brookite. Brookite, however, is the least known TiO2 phases and usually exists as byproduct during synthesising rutile or anatase. Therefore, in this study, the influence of sol-gel pH and soaking time on surface morphology, phases and grain size of TiO2 coating were investigated in an attempt to develop brookite thin film. Titanium (IV) isopropoxide (TTiP) is used as precursor for preparing TiO2 sols. Prior to heating, TiO2 layers were deposited on a glass slide by dipping it five times into TiO2 sols. The TiO2 layers were then heated at 450°C and soaked for 1 and 3 hours to form TiO2 coating. Analysis on the phases and grain size were carried out using X-ray diffraction (XRD). The TiO2 surface morphology was investigated using Scanning Electron Microscope (SEM). Results showed that brookite phase with grain size of 27.40 nm successfully deposited on glass slide from sols with pH12. Conversely, the TiO2 coatings deposited from sols of pH1 and pH7 are amorphous. The effect of soaking time on phases and grain size is insignificant but enhances coatings uniformity as the soaking time increased. Thus, it can be concluded that sol-gel pH affect TiO2 crystallinity and phases. Brookite film is develop only when the TiO2 sols is in bases condition or at higher pH value. |
| Databáze: | OpenAIRE |
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