Highly active photocatalyst and process for producing the same
AssigneeNittetsu Mining Co., Ltd.
InventorsKazuyuki Tohji, Akira Kishimoto, Takafumi Atarashi
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Abstract
Provided are a photocatalyst which is high in catalytic activity, is nontoxic, has a long life, allows visible light to be used directly for its photocatalytic reaction and is especially useful for hydrogen generation, and a process for producing it. It contains a cadmium compound, has a capsular structure, has an average particle diameter of 100 nm or less and can be manufactured by dropping a solution of a cadmium salt into a solution of a sodium compound or admixing a solution of a sodium compound in a suspension of particles of a cadmium compound.
Claims22
A photocatalyst comprising a capsule structure which comprises a cadmium compound shell and a void and having an average particle diameter of 50 nm or less.
A process for producing a photocatalyst comprising a capsule structure which comprises a cadmium compound shell and a void, said process comprising:
- dropping a solution of a cadmium salt into a solution of a sodium compound to first form a microscopic solid phase of cadmium hydroxide, which then turns into a cadmium compound instantaneously to form the shell of the capsule of the photocatalyst;
- and
- obtaining a photocatalyst comprising a capsular structure, which comprises a cadmium compound shell and void.
A process for producing a photocatalyst comprising a capsule structure, which comprises a cadmium compound shell and a void and having an average particle diameter of 100 nm or less, said process comprising:
- admixing a solution of a sodium compound in a suspension of particles of a cadmium compound;
- and
- obtaining a photocatalyst comprising a capsular structure, which comprises a cadmium compound shell and void.
Dependencies are inferred from the claim text.