Synthesis of Magnetic TiO₂ Particles for a Recoverable Application on Water Treatment

Abstract:

The magnetic photocatalysts (MPCs) can provide both a high specific surface area and an alternative for recovering used catalyst from treated water by the application of a magnetic field. In this study, the Fe₃O₄ particles were synthesized by co-precipitation under alkaline condition. After annealing, the suspension of magnetite particles can be separated by magnet. The magnetite particles were dried and then mixed with TTIP (titanium tetraisopropoxide) for sol-gel method. The MPCs were then achieved after dried and calcined in 300°C. The MPCs synthesized in this study can be separated from treated water by a simple magnet. The photocatalytic abilities of synthesized MPCs were evaluated by measuring the residual methylene blue (MB) amounts after irradiation under a light intensity of 1.0 mW/cm² at 365 nm. The results showed that the synthesized MPCs had good crystallinity of anatase and magnetite. The MPCs can be separated by a simple magnet and did not reduce the photocatalytic abilities significantly. With the advantages of reusability, durability, and separability the synthesized MPCs in this study appear a good alternative for water treatment and widely other potential applications. A MPC with an optimal Fe/Ti ratio and smaller particle size is expected to perform a more practical alternative on water treatment in the future.

• Periodical: Advanced Materials Research (Volumes 255-260)
• Pages: 2710-2713
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.255-260.2710
• Online since: May 2011
• Authors: Chih Hsiu Shen, Yu Jie Chang, Shang Lien Lo
• Keywords: Magnetic Photocatalyst (MPCs), Methylene Blue (MB), TiO₂ Particles

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