Self-Cleaning and Antibacterial Properties of Paint Containing ZnO and WO₃ Co-Doped VO₂ Thermochromic Nano-Pigment

Abstract:

Thermochromic nano-pigments of ZnO and WO₃ co-doped VO₂ for mixing in paint were prepared by chemical method. The samples were successfully synthesized after annealing at 700°C for 1 h in nitrogen atmosphere. ZnO concentrations of 0.1, 0.3 and 0.5 at% were co-doped with WO₃ in VO₂. The 0.1 at% ZnO doping exhibited an amorphous phase, while 0.3 and 0.5 at% ZnO doping showed monoclinic phase having thermochromic transition temperatures of 59.43 and 52.60°C, respectively. The crystallite size of 0.5 at% ZnO doped monoclinic phase was 42 nm. The coating paints on glass substrates were prepared by mixing white colour paint with 0.1, 0.3 and 0.5 wt% of the 0.5 at% ZnO and WO₃ co-doped VO₂ nano-pigment. It was found that the paint with 0.5 wt% loading exhibited self-cleaning properties and 99.99% antibacterial against under UV irradiation for 40 min.

• Periodical: Applied Mechanics and Materials (Volume 835)
• Pages: 27-33
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.835.27
• Online since: May 2016
• Authors: Vittaya Prommin, Lek Sikong*, Kalyanee Kooptarnond
• Keywords: Antibacterial Agent, Nanopigment, Self-Cleaning, Vanadium Dioxide, Zinc Oxide

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