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US 2010/0075836 A1Published application
Deactivation resistant photocatalyst and method of preparation
AssigneeCarrier Corporation
InventorsTreese Hugener-Campbell, Thomas Henry Vanderspurt, Wayde R. Schmidt, Steven M. Zhitnik
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Abstract
A photocatalyst formed using a sol-gel process provides high photoactivity, increased photocatalyst lifetime, and improved resistance to performance degradation caused by siloxane-based contaminants. The photocatalyst is formed by a method including the steps of photocatalyst template creation, template conditioning, template refinement, and coating application.
Claims20
A method of forming a UV photocatalyst, the method comprising:
- forming a catalyst material with a hydrolysis reaction in solution, where the hydrolysis reaction or reaction products of an organometallic precursor react simultaneously or in conjunction with a metal salt or a disassociation species of a metal salt;
- aging of the catalyst material produced by the hydrolysis reaction;
- filtering the catalyst material produced by the hydrolysis reaction;
- refluxing the catalyst material with a solvent having a lower surface tension than water;
- removing the solvent from the catalyst material;
- calcining the catalyst material;
- forming an aqueous slurry of the catalyst material;
- and
- applying the aqueous slurry to a surface of a substrate to form a photocatalyst film.
6 more elements
Dependencies are inferred from the claim text.