▎ 摘　　要

NOVELTY - Photocatalyst comprises reduced graphene oxide, p-type nickel(II) oxide particles, and nickel(II) oxide/cerium(IV) oxide/reduced graphene oxide heterostructure nanocomposite containing n-type cerium oxide particles. The p-type nickel(II) oxide particles and the n-type cerium(IV) oxide particles are grafted onto the reduced graphene oxide sheet. USE - The photocatalyst is useful for carbon dioxide reduction under visible light irradiation on the photocatalyst to form formaldehyde (All claimed). ADVANTAGE - The photocatalyst: reduces carbon dioxide reduction cost; and converts carbon dioxide into fuel products.