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HYDROPHILIC, LIGHT ACTIVE COATING FOR MEMBRANES

United States Patent Application

20170203258
A1
View the Complete Application at the US Patent & Trademark Office
A porous membrane provides enhanced filtration of pollutants and particles by coating the membrane with conformal thin films of doped titanium dioxide via atomic layer deposition or, alternatively, sequential infiltration synthesis. The membrane can either be organic or inorganic, and the doping of the membrane, usually with nitrogen, is an important feature that shifts the optical absorption of the TiO.sub.2 from the UV range into the visible-light range. This enables the use of lower energy light, including sunlight, to activate the photocatalytic function of the film. The coating described in the present invention is compatible with virtually any porous membrane and allows for precise tuning of the pore size with molecular precision. The present invention presents a new coating process and chemical structure that provides catalytic activity, strongly enhanced by light, to both mitigate fouling and break down various organic pollutants in the process stream.
Darling, Seth B. (Chicago, IL), Lee, Anna (Darien, IL), Elam, Jeffrey W. (Elmhurst, IL), Libera, Joseph A. (Clarendon Hills, IL)
UCHICAGO ARGONNE, LLC (Chicago IL)
15/ 002,102
January 20, 2016
STATEMENT OF GOVERNMENT RIGHT [0001] The United States Government claims certain rights in this invention pursuant to DE-AC02-06CH11357 between the United States Department of Energy and UChicago Argonne, LLC representing Argonne National Laboratory and also through LDRD 09299-00-153.