US 12,403,437 B2
Method for producing nanodiamonds doped with group 14 element, and method for purifying same
Tomoaki Mahiko, Tokyo (JP); Yuto Makino, Tokyo (JP); Akihiko Tsurui, Tokyo (JP); Ming Liu, Tokyo (JP); and Masahiro Nishikawa, Tokyo (JP)
Assigned to DAICEL CORPORATION, Osaka (JP)
Appl. No. 17/598,110
Filed by DAICEL CORPORATION, Osaka (JP)
PCT Filed Mar. 16, 2020, PCT No. PCT/JP2020/011340
§ 371(c)(1), (2) Date Mar. 18, 2022,
PCT Pub. No. WO2020/195999, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 2019-058397 (JP), filed on Mar. 26, 2019; and application No. 2019-212822 (JP), filed on Nov. 26, 2019.
Prior Publication US 2022/0331766 A1, Oct. 20, 2022
Int. Cl. B01J 3/08 (2006.01); B01J 3/06 (2006.01); B82Y 30/00 (2011.01); B82Y 40/00 (2011.01); C01B 32/15 (2017.01); C01B 32/28 (2017.01)
CPC B01J 3/08 (2013.01) [B01J 3/062 (2013.01); C01B 32/15 (2017.08); C01B 32/28 (2017.08); B01J 2203/0655 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); C01P 2004/64 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for producing a nanodiamond doped with a Group 14 element selected from the group consisting of Si, Ge, Sn, and Pb, the method comprising:
subjecting a nanodiamond composition to an alkali treatment to remove the Group 14 element and/or oxide thereof, wherein the nanodiamond composition comprises a nanodiamond doped with the Group 14 element, a Group 14 element and/or an oxide thereof,
a ratio (H/D) of a peak area (H) of a surface hydroxy group (OH) to a peak area (D) of diamond by Raman spectroscopy is from 0.1 to 5, and
a ratio (C/D) of a peak area (C) of a surface carbonyl group (CO) to a peak area (D) of diamond by Raman spectroscopy is from 0.01 to 1.