Production of photocatalytically active TiO₂ –P₂O₅ glasses by the Sol-gel process

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2019

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Öztürk, Yiğit Cansın

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TiO2-P2O5 (TP) gels containing large amounts of TiO2 were successfully synthesized by the sol-gel process. Influence of processing parameters such as pH, Ti precursor type, amount, H2O/Ti ratio, solvent type, concentration on the formation of homogeneous gels were investigated. Prepared gels were subjected to regulated heat-treatments at various temperatures, durations, and heating rates to obtain monolithic TP glasses. Binary glasses having compositions of xTiO2 . (1-x)P2O5 (x= 70, 80, 90, 95 mol %) were produced and evaluated in terms of their appropriateness for self-cleaning applications. The results revealed that photocatalytic activity of glasses could be customized by controlling processing and heat-treatment conditions carefully. TP glasses have effectively decomposed Methylene Blue (MB) under UV illumination and best MB degradation rate was 96.1 % after exposing to UV light for 90 min. Enhanced photocatalytic activity was attributed to compatibility of anatase crystallinity along with high specific surface area owing to the amorphous.

Subject Keywords

Glass., Sol-gel, Glass, TiO₂, P₂O₅, Photocatalytic, Self-cleaning.

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http://etd.lib.metu.edu.tr/upload/12624383/index.pdf
https://hdl.handle.net/11511/44678

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

Y. C. Öztürk, “Production of photocatalytically active TiO₂ –P₂O₅ glasses by the Sol-gel process,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences. Metallurgical and Materials Engineering., Middle East Technical University, 2019.