The Effect of TiO2 Composition on The Self Cleaning on A Glass Surface

Lizda J Mawarani

Abstract


One of the technologies that are being developed for self-cleaning applications is to utilize TiO2 photocatalytic
material through a photocatalytic chemical reaction process assisted by the energy of ultraviolet rays. Photocatalytic effect
decomposes the impurities in the form of organic compounds. TiO2 synthesized by using precursor of TiCl3. The synthesis
uncorporates ammonia washing and calcination at 300C for 4 hours to obtain TiO2 anatase. TiO2 solution was coated on the
glass sample in the form of paste made by mixing PEG 4000, chloroform, and TiO2 powder. TiO2 composition was varied, i.e. 0
gram, 1 gram, 1.5 grams, 2 grams, 2.5 grams and 3 grams, while PEG and chloroform amounts fixed for all variations observed.
Coatings were was under taken by the doctor blade technique. Self cleaning testing was using two types of impurities, namely
mud and dyes. The test was done in two ways, namely hydrophilic and photocatalytic properties tests. The results showed that
the best self-cleaning properties was obtained on the sample with a composition of TiO2 of 3 grams with the ability to eliminate
impurities up to 96% under direct sun and 74% in UV radiation. It has a transmittance difference of up to 58.8%. The
hydrophilic properties depend on photocatalytics. However, due to profuse agglomeration of TiO2 the hydrophilic properties
decreases.

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