Production of Highly Efficient Photocatalytic TiO₂ Powders by Mechanical Ball Milling

Abstract:

Highly efficient photocatalytic TiO₂ powders were prepared using a conventional ball mill with various milling times of 0, 12, 24 and 48 h. The photocatalytic activity of the prepared TiO₂ powders was evaluated using the decomposition rate obtained by methylene blue (MB) solution and acetic acid gas under UV light irritation. After 24 h milling, the particle size decreased from 555 nm to 122 nm without changing any of the crystal structure. The photocatalytic TiO₂ powders prepared by 24 h milling decomposed 94% of the methylene blue solution while the non-milled TiO₂ powders provided only 61% decomposition. After the removal of acetic acid gas, it took 1.5 h for the 24h-milled powders to decompose 100%, while the non-milled TiO₂ showed 73% decomposition with same UV illumination duration.

• Periodical: Advanced Materials Research (Volume 650)
• Pages: 44-48
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.650.44
• Online since: January 2013
• Authors: Tugce Oztas, Jongee Park, Abdullah Öztürk
• Keywords: Ball Milling, Photocatalyst, TiO₂

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