METHOD FOR PRODUCING CORE-SHELL STRUCTURE AND CATALYST COMPRISING THE STRUCTURE PRODUCED THEREBY AND FOR CLEANING EXHAUST GAS

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a core-shell structure, wherein the thickness of the shell part is controlled at a nano-meter level and properties, particularly heat resistance, given by the materials to be used in a core part are improved.

SOLUTION: The method for producing the core-shell structure composed of the core part based on a first metal oxide and a shell part based on a second metal oxide different from the first metal oxide comprises: a step (a) of adding powder of the first metal oxide to an aqueous solution containing metal salt being a supply source of the second metal oxide; a step (b) of adding hexamethylenetetramine to a suspension liquid obtained at the step (a) and heating the hexamethylenetetramine-added suspension liquid at the temperature enough to decompose hexamethylenetetramine; and a step (c) of firing a product obtained at the step (b).

COPYRIGHT: (C)2010,JPO&INPIT