US 12,227,422 B2
Sol-gel synthesis of max phase functional materials
Christina S. Birkel, Tempe, AZ (US); and Jan P. Siebert, Tempe, AZ (US)
Assigned to Arizona Board of Regents on behalf of Arizona State University, Scottsdale, AZ (US)
Filed by Christina S. Birkel, Tempe, AZ (US); and Jan P. Siebert, Tempe, AZ (US)
Filed on Jul. 21, 2022, as Appl. No. 17/814,095.
Claims priority of provisional application 63/225,845, filed on Jul. 26, 2021.
Claims priority of provisional application 63/225,127, filed on Jul. 23, 2021.
Claims priority of provisional application 63/225,121, filed on Jul. 23, 2021.
Prior Publication US 2023/0037291 A1, Feb. 9, 2023
Int. Cl. C01B 32/907 (2017.01); B29C 39/00 (2006.01); B29C 39/38 (2006.01); C01B 21/06 (2006.01); B29K 105/00 (2006.01); B29L 7/00 (2006.01)
CPC C01B 32/907 (2017.08) [B29C 39/003 (2013.01); B29C 39/38 (2013.01); C01B 21/0602 (2013.01); B29K 2005/00 (2013.01); B29K 2105/0061 (2013.01); B29L 2007/008 (2013.01); C01P 2004/03 (2013.01); C01P 2004/04 (2013.01); C01P 2004/32 (2013.01); C01P 2004/61 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method of making carbonaceous MAX phase structures, the method comprising:
forming a gel comprising a transition metal M, a Group 3A or Group 4A metal or semimetal A, and an acidic chelating agent or gelling agent comprising X, wherein the chelating agent or gelling agent comprises a polysaccharide, and X comprises one or both of carbon and nitrogen;
shaping the gel to yield a shaped gel; and
heating the shaped gel to yield MAX phase structures with a composition represented by Mn+1AXn, wherein n is 1, 2, 3, or 4.