The Effect Of Ni-TiO2 Coating On Different Substrates

Mohd Faizairi, Muhammad Faiq Aqil (2019) The Effect Of Ni-TiO2 Coating On Different Substrates. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Common ceramic tiles do not have any self-cleaning property which can reduce the growth of bacteria that are harmful to humans. After several years, ceramic tiles with self-cleaning property are gaining ranks in the market of ceramic tiles. This was possible after years of research and development to improve the existing ceramic tiles. The improve self-cleaning ceramic tiles can be used in many areas especially areas that require high level of hygiene such as in food industries, pharmaceutical industries and hospitals. The aim of this study is to investigate the effect of Ni addition on the microstructure of TiO2 coating on different ceramic substrates and to determine the photocatalytic properties of Ni-TiO2 coating. Firstly, TiO2 sol is made by using sol – gel dip coat method. Nickel was added to the pure TiO2 sol creating a Ni-TiO2 sol. Glass, unglazed and glazed ceramic substrates were used as the substrates. The dip – coat process was done in five dipping time. The surface morphology and thickness of coated substrates are determined by using the SEM analysis while the phase formation is determined by using XRD analysis followed with the photocatalytic testing. It was observe that cracks was produced on the unglazed ceramic tile, meanwhile on glass and glazed ceramic tile, even coating was observed. Thickness of coating was vary depend on the type of substrates as unglazed ceramic tile had thicker coating followed by glazed and glass. In XRD analysis, anatase presence was higher compared to rutile for all the substrates that would lead to good photocatalytic properties. Result from photocatalytic testing indicate that unglazed ceramic tile had the better rate of methylene blue degradation among other substrates. In conclusion, the addition of Nickel into pure TiO2 sol had a different effect on the surface morphology, thickess, phase formation and photocatalytic property of the coating depending on the type of substrates.

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