US 12,215,038 B2
Method for preparing two-dimensional ordered mesoporous nanosheets by inorganic salt interface-induced assembly
Yonghui Deng, Shanghai (CN); Liangliang Liu, Shanghai (CN); Yidong Zou, Shanghai (CN); and Xuanyu Yang, Shanghai (CN)
Assigned to FUDAN UNIVERSITY, Shanghai (CN)
Appl. No. 17/603,587
Filed by FUDAN UNIVERSITY, Shanghai (CN)
PCT Filed Mar. 9, 2020, PCT No. PCT/CN2020/078361
§ 371(c)(1), (2) Date Oct. 14, 2021,
PCT Pub. No. WO2020/228400, PCT Pub. Date Nov. 19, 2020.
Claims priority of application No. 201910391031.7 (CN), filed on May 11, 2019.
Prior Publication US 2022/0194811 A1, Jun. 23, 2022
Int. Cl. C01G 23/053 (2006.01); B32B 18/00 (2006.01); C01B 32/15 (2017.01); C01B 33/113 (2006.01); C01F 7/30 (2022.01); C01F 17/235 (2020.01); C01F 17/32 (2020.01); C01G 25/02 (2006.01); B82Y 30/00 (2011.01); B82Y 40/00 (2011.01)
CPC C01G 23/053 (2013.01) [B32B 18/00 (2013.01); C01B 32/15 (2017.08); C01B 33/113 (2013.01); C01F 7/30 (2013.01); C01F 17/235 (2020.01); C01F 17/32 (2020.01); C01G 25/02 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); C01P 2004/01 (2013.01); C01P 2004/24 (2013.01); C01P 2006/16 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for preparing two-dimensional (2D) ordered mesoporous nanosheets by inorganic salt interface-induced assembly, comprising the following steps:
(1) preparing a nanomaterial precursor solution by using an amphiphilic block copolymer as a template;
(2) introducing the nanomaterial precursor solution into a soluble inorganic salt serving as a substrate; guiding mass diffusion of the nanomaterial precursor solution in the soluble inorganic salt by a physical means of suction filtration or low-speed centrifugation to realize a single-layer dispersion interface on a surface of the precursor solution, wherein the suction filtration is less than 0.03 MPa, and the low-speed centrifugation is less than 4,000 rpm;
(3) based on a principle of solvent evaporation-induced co-assembly (EICA), regulating a volatile organic solvent to evaporate in a gradient temperature-controlled manner, to realize self-assembly of a molecular precursor and the amphiphilic block copolymer on a surface of the soluble inorganic salt;
(4) heating up to 300-600° C. in N2; carrying out calcination for 2-3 h to remove the amphiphilic block copolymer and to obtain a layered 2D ordered mesoporous organic/inorganic hybrid composite; heating up to 430-630° C. in air in a muffle furnace; carrying out calcination for 2-3 h to remove residual carbon and to obtain an ordered mesoporous structure;
dissolving the soluble inorganic salt with an amount of deionized water to obtain a 2D single-layer ordered mesoporous nanosheet material.