Patent ID: 8343454

Claim:
A preparation method for a Cu 2 O spherical assembly particle composition, comprising: (Step 1) preparing a Cu 2 O precursor solution by dissolving a carboxyl copper compound expressed by the following Chemical Formula 1, or a copper salt and a carboxyl group-contained compound expressed by the following Chemical Formula 2 into a solvent; Chemical Formula 1 (R 1 —COO) 2 Cu where R 1 is an alkyl group having a carbon number in the range from 1 to 18, Chemical Formula 2 R 1 —COOH where R 1 is an alkyl group having a carbon number in the range from 1 to 18, (Step 2) putting a weak reducing agent having a standard reduction potential in the range from −0.2 to −0.05V into the Cu 2 O precursor solution to form Cu 2 O spherical assembly particles, each of which is formed by agglomerating a plurality of Cu 2 O ultrafine particles that have an average diameter in the range from 1 to 100 nm and a standard deviation on the diameter in the range from 0 to 10%, the Cu 2 O spherical assembly particles having an average diameter in the range from 0.1 to 10 μm and a standard deviation on the diameter in the range from 0 to 40%; and (Step 3) separating the Cu 2 O spherical assembly particles from the resultant material of the Step 2.