US 12,437,938 B2
Alkali metal quaternary nanomaterials
Nosipho Moloto, Johannesburg (ZA); Kalenga Mubiayi, Johannesburg (ZA); and Grace Ngubeni, Johannesburg (ZA)
Assigned to UNIVERSITY OF THE WITWATERSRAND, JOHANNESBURG, Johannesburg (ZA)
Appl. No. 17/910,022
Filed by UNIVERSITY OF THE WITWATERSRAND, JOHANNESBURG, Johannesburg (ZA)
PCT Filed Mar. 11, 2021, PCT No. PCT/IB2021/052050
§ 371(c)(1), (2) Date Sep. 8, 2022,
PCT Pub. No. WO2021/181334, PCT Pub. Date Sep. 16, 2021.
Claims priority of application No. 2020/01521 (ZA), filed on Mar. 11, 2020.
Prior Publication US 2023/0112176 A1, Apr. 13, 2023
Int. Cl. B82Y 30/00 (2011.01); C01B 19/00 (2006.01); C01G 19/00 (2006.01); H01G 9/00 (2006.01); H01G 9/20 (2006.01); B82Y 20/00 (2011.01); B82Y 40/00 (2011.01)
CPC H01G 9/2022 (2013.01) [B82Y 30/00 (2013.01); C01B 19/002 (2013.01); C01G 19/006 (2013.01); H01G 9/0029 (2013.01); H01G 9/2059 (2013.01); B82Y 20/00 (2013.01); B82Y 40/00 (2013.01); C01P 2002/72 (2013.01); C01P 2002/77 (2013.01); C01P 2002/82 (2013.01); C01P 2002/86 (2013.01); C01P 2004/04 (2013.01); C01P 2004/64 (2013.01); C01P 2006/40 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An alkali metal quaternary crystalline nanomaterial having general Formula A, wherein Formula A is I2-II-IV-VI4, wherein the nanomaterial is selected from the group consisting of Li2ZnSnSe4 (LZTSe), Na2ZnSnSe4 (NZTSe), Li2ZnSnS4 (LZTS), and Na2ZnSnS4 (NZTS);
wherein a crystal phase of the crystalline nanomaterial is not kesterite and/or stannite; and
wherein the crystal phase of the nanomaterial is a primitive mixed Cu—Au like structure (PMCA) and the nanomaterial has a space group: P42m.