The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 25, 2006
Filed:
Mar. 12, 2003
Debra Rolison, Arlington, VA (US);
Jeremy Pietron, Washington, DC (US);
Rhonda Stroud, Washington, DC (US);
Debra Rolison, Arlington, VA (US);
Jeremy Pietron, Washington, DC (US);
Rhonda Stroud, Washington, DC (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
Gold-titania (Au—TiO) composite aerogels and ambigles were synthesized, characterized, and tested as ambient temperature catalysts for carbon monoxide. Adding alkanethiolate-monolayers-protected gold clusters (with ˜2 nm Au cores) directly to titania sol before gelation yields uniformly dispersed guests in the composite aerogel. The Au guests aggregate to 5 to 10 nm upon calcination to remove alkanethiolate and crystallize amorphous titania to anatase. The resulting composite aerogel exhibits high catalytic activity toward CO oxidation at room temperature at Au particle sizes that are essentially inactive in prior Au—TiOcatalysts. Transmission electron microscopy illustrates the three-dimensional nature of the catalytic nanoarchitecture in which gold guests contact multiple anatase nanocrystallites.