Synthesis of Magnetic Photocatalystic Particles for Bacterial Control

Abstract:

Magnetic photocatalystic particles (MPCs) become an alternative process for water and wastewater treatment due to the high removal rate of organic pollutants and a good recovery. Little information of MPCs on the control of microorganisms was obtained in previous researches. In this study, the synthesized MPCs combined with 365 nm UVA irradiation under a light of 1.0 mW/cm² were applied to control a typical gram-negative strain Staphylococcus sciuri (99% Identified by the NCBI website), which was isolated from an indoor traditional market in the middle area of Taiwan. As a result, the highest bactericidal efficiency (BE) of MPCs contained 0.50 g magnetic particles in nutrient broth was achieved to 68.18% at 50 mins. Considering to each contribution of bacterial control, UVA irradiation played an important role of BE increased from 34.88% at 10 mins to 63.64% at 50 mins. Photocatalystic reaction provided extra more 11.02% of BE at initial 20 mins. The synthesized MPCs demonstrated good crystallinity of anatase by SEM-EDS and XRF. The 76% MPCs can be recovered by simple magnets after photocatalystic reaction.

• Periodical: Applied Mechanics and Materials (Volumes 217-219)
• Pages: 821-825
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.217-219.821
• Online since: November 2012
• Authors: Yi Tang Chang, Yu Jie Chang, Cheng Che Chiang

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