Carbon dioxide reducing photocatalyst and preparation method therefor, and carbon dioxide reducing method

A method comprising:

• preparing a first source solution that includes a poly 3-hexyl thiophene (P3HT) polymer concentrator;
• providing an electron acceptor that includes titanium dioxide (TiO2) in the first source solution, thereby producing a preliminary photocatalyst in which the P3HT polymer concentrator is deposited on the electron acceptor;
• providing the preliminary photocatalyst in a second source solution containing a rhenium catalyst, thereby depositing the rhenium catalyst on the electron acceptor and producing a carbon dioxide reducing photocatalyst, wherein a content of the P3HT polymer concentrator in the carbon dioxide reducing photocatalyst is 0.5 mg per 10 mg of the electron acceptor;
• and
• adsorbing an additive on a surface of the electron acceptor, wherein the additive includes trifluoroethanol (TFE),
• wherein the carbon dioxide reducing photocatalyst has a carbon dioxide reduction efficiency that is greater than a carbon dioxide reduction efficiency of an alternative carbon dioxide reducing photocatalyst prepared by depositing the rhenium catalyst on an alternative electron acceptor before depositing the P3HT polymer concentrator on the alternative electron acceptor.