| 摘要 |
PROBLEM TO BE SOLVED: To provide a colloidal solution stably dispersed in water, substantially containing only a compound represented by general formula: [M<SP>2+</SP><SB>1-x</SB>M<SP>3+</SP><SB>x</SB>(OH)<SB>2</SB>]<SP>x+</SP>and monovalent inorganic anions, and useful for a catalyst, etc., and to provide a method for producing the same. SOLUTION: The aqueous dispersion type colloidal solution is prepared by sophisticatedly reacting a mixed aqueous solution of a divalent metal salt and a trivalent metal salt with an aqueous alkali solution and dispersing in water a layered double hydroxide synthesized by coprecipitating the divalent metal salt and the trivalent metal salt by the reaction. The colloidal solution substantially contains only a compound represented by the general formula: [M<SP>2+</SP><SB>1-x</SB>M<SP>3+</SP><SB>x</SB>(OH)<SB>2</SB>]<SP>x+</SP>and monovalent inorganic anions, wherein a molar ratio of the monovalent inorganic anions to the compound is in a range of 0.1-0.4. In the general formula, M<SP>2+</SP>represents a divalent metal ion; M<SP>3+</SP>represents a trivalent metal ion; and x is in a range of 0.13<x<0.28. COPYRIGHT: (C)2011,JPO&INPIT |
