公开(公告)号：US20230303402A1

公开(公告)日：2023-09-28

申请号：US18124792

申请日：2023-03-22

Applicant: Kunming University of Science and Technology

Inventor： Fei Wang ,  Kai Li ,  Ping Ning ,  Zhao Li ,  Xin Sun ,  Yixing Ma ,  Chi Wang

IPC: C01F7/34

CPC classification number: C01F7/34 ,  C01P2006/82 ,  C01P2004/64

Abstract: The present disclosure provides a preparation method of nano-aluminum oxide (nano-Al2O3) with a controllable hydroxyl content, belonging to the technical field of nano-alumina. H2O2 dissolved in water dissociates a large number of hydroxyl radicals. In the present disclosure, a resulting H2O2 solution is used as a solvent for precipitation; during the precipitation, a soluble aluminum salt and a pore-enlarging agent are reacted to generate a precipitate under alkaline conditions, and the hydroxyl radicals are distributed on a surface of the precipitate. During drying, the hydroxyl radicals are converted into bound water and distributed on a surface and in pores of an aluminum hydroxide precursor; during roasting, the bound water is destroyed to form hydroxyl. The hydroxyl content of the nano-Al2O3 can be regulated by controlling a concentration of the H2O2 solution, and the nano-Al2O3 has the hydroxyl content positively correlated with the concentration of the H2O2 solution.