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Antibacterial and photocatalytic activity of TiO2 and ZnO nanomaterials in phosphate buffer and saline solution |
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| Authors: | Alan Man Ching Ng Charis May Ngor Chan Mu Yao Guo Yu Hang Leung Aleksandra B Djurišić Xu Hu Wai Kin Chan Frederick Chi Chung Leung Shuk Yin Tong |
| Institution: | 1. Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, Hong Kong 2. Department of Physics, South University of Science and Technology of China, Shenzhen, China 3. School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, Hong Kong 4. Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, Hong Kong |
| Abstract: | We studied antibacterial and photocatalytic activity of anatase TiO2 and ZnO in phosphate buffer and saline solution. We found that the different anions in the suspension medium (chloride and phosphate) significantly affected the following suspension properties: the stability of nanoparticle suspension, the release of metal ions from the nanoparticles, and the production of the reactive oxygen species by the nanoparticles. As a result, antibacterial activity and photocatalytic dye degradation were also affected. However, the effect of the suspension medium was different for ZnO and TiO2. Obtained results are discussed. |
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