Synthesis of Carbon-Sphere@TiO₂/Cu Core-Shell Composites and the Studies on their Photocatalytic and Antibacterial Properties

Abstract:

Non-contacting (rattle-type) carbon-sphere@TiO₂/Cu core-shell composites were prepared through the spray drying technique combined with calcinations using melamine formaldehyde (MF) microspheres as core templates, and TiO₂ colloid and cupric salt as shell precursors. After the calcination of the as-dried MF@TiO₂/cupric salt core-shell spheres at elevated temperatures under nitrogen, rattle-type carbon-sphere@TiO₂/Cu core-shell composites were derived with relative uniform sizes. Photocatalytic tests showed that the composites obtained at 550 °C exhibited higher efficiency than those obtained at 700 and 800°C and also higher than the P25 commercial TiO₂ for the degradation of methylene blue (MB) under visible light irradiation. Antibacterial studies revealed that the rattle-type composites owned excellent antibacterial ability and were stable and reusable.

• Periodical: Advanced Materials Research (Volume 664)
• Pages: 574-577
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.664.574
• Online since: February 2013
• Authors: Hong Yan Wang, Hong Liang Li, Hui Liu, Ai Ping Fu, Guang Wei Kan, Qiao Wang
• Keywords: Antibacterial Activity, Core-Shell Composites, Photocatalytic Activity, Spray Drying

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