Self cleaning ceramic tiles and glass windows
K. Murugan
Self cleaning ceramic glaze tiles and glass are being developed with nanostructured titania coating. Nano titania is being produced by various synthesis routes and is dip coated on ceramic glaze and microscope glass. The dip-coated tiles are subsequently fired at different temperatures.
SEM image of spin coated nano TiO2 on ceramic glaze tiles
Finger print on uncoated (left) and coated (right) part of tiles after exposed to sun light
Nano silver coated ceramic filter candles for disinfectant water filter applications
K. Murugan, J. Revathi, Neha Hebalkar and Tata Narasinga Rao
Technology for nano silver coated ceramic drinking water filters has been successfully developed and commercialized. The amount of silver present in the filtered water is well below the EPA permissible level for safe drinking water. The antibacterial effect of the nano silver coated ceramic drinking water filter conforms to IS 1622:1981 for E-coli and was also put on field trials in rural areas in collaboration with the Byrraju Foundation. Currently, new techniques are being developed for reducing the silver loading as well as improved antibacterial performance.
Cross section of nano silver-coated and uncoated ceramic candles
XRD on bar candle and nano silver coated candle
Before filtration (105 cfu/ml)
SEM image of nano silver inside the candle
Laboratory to Market
After filtration (Ocfu/ml)
Nanosilver-candle filter technology has been successfully transferred to a company and the product is in the market with the brand name of PURITECH.
