Preparation of Tio₂-PEG Thin Film on Hydrophility Performance and Photocurrent Response

Maulidiyah, Halimahtussaddiyah Ritonga, Catur Elok Faiqoh, Dwiprayogo Wibowo and Muhammad Nurdin*

Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Halu Oleo, Kendari 93232 – Southeast Sulawesi, Indonesia

DOI : http://dx.doi.org/10.13005/bbra/1865

ABSTRACT: TiO₂ photocatalytic process has been developed and used in various applications. One of the use of TiO₂ is related to the hydrophilic properties, which is shown with a small contact angle between the surface of object and liquid (<10°). In this study, TiO₂ was coated on a glass surface with the dip coating method. TiO₂ catalyst was prepared by titanium tetraisopropoxide (TTIP) as precursor and polyethylen glycol (PEG) as template calcined at a temperature of 450°C. The addition of PEG was varied to obtain optimal conditions. Measurement of Diffuse Reflectance Spectroscopy UV-Vis (DRS UV-Vis) showed a decrease in the value of the band gap for TiO₂, TiO₂-PEG 200, TiO₂-PEG 400 and TiO₂-PEG 1000 were 3.153 eV; 3.056 eV; 3.012 eV and 2.975 eV, respectively. Results of contact angle measurements have been achieved hydrophilic properties. While, the photocurrent response of the three TiO₂ working electrodes added the PEG 200, PEG 400, PEG 100 were 2.3×10^-3 A, 2.2×10^-3 A and 4.2×10^-3 A, respectively. Therefore, PEG could improve the performance of TiO₂ catalysts.

KEYWORDS: TiO₂-PEG; Thin film; Hydrophilic; Photoelectrocatalytic

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