Methods of removing odors, particularly odors within enclosed environments are provided which employ nanocrystalline metal oxide and metal hydroxide particles. The nanocrystalline particles are dispersed within an enclosed space so as to contact exposed surfaces located within the space such as walls,...http://www.google.com.au/patents/US8038935?utm_source=gb-gplus-sharePatent US8038935 - Treatment of odors using nanocrystalline metal oxides
